Entries |
Document | Title | Date |
20080240749 | Image Forming Apparatus - An image forming apparatus includes a calculating device, a waiting time calculating device, and a print controlling device. The calculating device divides print data to be printed onto a recording medium into a plurality of zones along a conveyance direction of the recording medium. The calculating device calculates printing time and drying time per each divided zone based on a data amount in each zone. The waiting time calculating device calculates waiting time from completion of printing onto the recording medium until the recording medium has been dried, based on the printing time and the drying time per each zone in consideration of elapse of the drying time of the previously printed zone(s) during printing. The print controlling device configures settings for printing of the recording medium based on the waiting time and performs printing according to the settings. | 10-02-2008 |
20080285988 | Image forming apparatus and recording-medium feeding method - An image forming apparatus includes a storage unit configured to store a recording medium, an image forming unit configured to form an image on the recording medium, a paper feed unit configured to supply the recording medium from the storage unit, a conveying unit configured to convey the recording medium supplied by the paper feed unit to the image forming unit, and a control unit configured to control the paper feed unit and the conveying unit in conveying the recording medium. In accordance with a conveyance state in which the recording medium supplied from the storage unit by the paper feed unit is conveyed to the conveying unit, the control unit controls the conveying speed of the next recording medium supplied by the paper feed unit. | 11-20-2008 |
20080292337 | Image forming apparatus and printing control method therefor - The present invention is an image forming apparatus having no two-sided printing mechanism in which, by setting a front side printed paper sheet in a manual paper feed section, the paper sheet is taken from the manual paper feed section and a back side printing is executed. At this moment, when a paper detecting switch | 11-27-2008 |
20080310868 | IMAGE FORMING APPARATUS AND METHOD TO CONTROL A VELOCITY RATIO THEREOF - An image forming apparatus and a method to control a velocity ratio thereof. The image forming apparatus includes a developing device to rotate opposite a photoconductive medium and to supply the photoconductive medium with a developer, and a controller to control a velocity ratio of the developing device to the photoconductive medium according to an accumulated number of printed copies. | 12-18-2008 |
20090041484 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus and an image forming method capable of executing process control at appropriate timing are provided. A control section of an image forming apparatus carries out control for determining execution time of process control and executing the process control. The control section includes a counting section, a determining section and a process control management section. The counting section counts a number of printed sheets. The determining section determines on what time process control is to be executed form the counted number of printed sheets for each time zone. The process control management section manages the process control executed at an image forming section with the whole of the image forming apparatus. | 02-12-2009 |
20090041485 | Image forming apparatus - A disclosed image forming apparatus includes a transport unit configured to transport a recording medium along a transport path, a transport status detection unit disposed on the transport path and configured to detect a transport status of the recording medium, a control unit configured to control transport by the transport unit according to the transport status of the recording medium detected by the transport status detection unit, and a container unit configured to hold the recording medium. If the transport status detection unit detects a delay in transporting the recording medium, the control unit controls the transport unit to discharge the recording medium or another recording medium in the transport path into the container unit. | 02-12-2009 |
20090080916 | XEROGRAPHIC COPYING APPARATUS AND METHOD OF CHECKING TROUBLE POINT IN THE SAME AND COMPUTER PROGRAM - In a method of checking a trouble point in a xerographic copying apparatus of the invention, a sequence code is selected from a plurality of sequence codes to distinguish a plurality of sequences to stop an operation of the xerographic copying apparatus in any one process of a plurality of print processing processes for print output of a sheet, an operation of a photoconductor in a state where toner is attached is stopped in any one process among the plurality of print processing processes in accordance with the sequence corresponding to the selected sequence code, and any one trouble point is checked, and therefore, the point where a poor image is generated is suitably grasped. | 03-26-2009 |
20090092406 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREFOR - An image forming apparatus in which surplus tabbed sheets produced in one set of output can be utilized for the next set of output, without requiring a user to perform a laborious task. In the image forming apparatus, a CPU calculates the number of tabbed sheet groups which will be used for one set of image formation and the number of tabbed sheets which will be used from among the last tabbed sheet group. Among the last tabbed sheet group, surplus tabbed sheets which will be left unused in the one set of image formation are determined. If the number of tabbed sheets is equal to or less than the number of the surplus tabbed sheets, at least one of the surplus tabbed sheets is used to carry out two sets of image formation. | 04-09-2009 |
20090116859 | IMAGE FORMING APPARATUS - An image forming apparatus includes a counting unit that, when a driving unit for rotating an image carrier is operating, adds a predetermined first count value to a total count value in a predetermined timing and that, when the driving unit is being stopped, subtracts a predetermined second count value from the total count value in every predetermined timing; and a suspending unit that suspends printing when the total count value becomes equal to or larger than a preset suspend value. | 05-07-2009 |
20090129796 | IMAGE FORMING APPARATUS - There are provided a control unit which controls image quality maintenance, a detection unit which detects a print command of image data, a calculation unit which calculates a print ratio of the image data when the print command for printing at least a predetermined number of sheets is detected, and a toner specific concentration control unit which sets toner specific concentration for each print of the plural sheets on the basis of the print ratio calculated by the calculation unit. | 05-21-2009 |
20090162082 | Image forming apparatus - An image forming apparatus includes an image forming unit, a first sheet stack portion, a sheet output section, and a post processing unit. The image forming unit forms an image on a sheet. The first sheet stack portion is provided at an upper face of the image forming unit. The sheet output section outputs the sheet on which the image is formed by the image forming unit from one side of the image forming apparatus to the first sheet stack portion. The post processing unit is provided adjacent to a lateral side of the image forming unit at an upstream side of the sheet output section to execute post processing on the sheet. A sheet subjected to post-processing by the post-processing unit is output to the first sheet stack portion from the same direction as a sheet not subjected to post-processing by the post-processing unit. | 06-25-2009 |
20090169223 | IMAGE FORMING APPARATUS - An image forming apparatus capable of appropriately cleaning an image carrier is provided. An image forming apparatus | 07-02-2009 |
20090175636 | IMAGE FORMING APPARATUS - To prevent image defects such as fog and irregularities caused by the accumulation of the oppositely charged toner by flying the toner toward a photoreceptor to compulsorily consume the toner even though the toner is oppositely charged toner having a small charged amount. A potential difference between the photoreceptor and the development roller is set at a value at which the normally charged toner on the development roller can be flown toward the photoreceptor in the development phase at the time of compulsorily consuming the toner, and this potential difference is set at a value at which the flown normally charged toner can be returned to the development roller in the recovery phase. A development duty and a frequency f are set in such a way that a time period in the development phase is larger than a time taken for the normally charged toner on the development roller to fly to a point located midway between the development roller and the photoreceptor and is smaller than a time taken for arriving at the photoreceptor, and a time period in the recovery phase is larger than a time taken before the normally charged toner arrived at the point located midway between the development roller and the photoreceptor arrives at the photoreceptor, returns to the development roller to beaten out the oppositely charged toner and the oppositely charged toner beaten out flies to the photoreceptor. | 07-09-2009 |
20090190941 | IMAGE FORMING APPARATUS - An image forming apparatus is disclosed in which a guide member configured to guide a sheet to a nip section between a heating roller and a pressing roller is disposed close to the upstream side of the rollers and on the pressing roller side. A downstream end of the guide member is disposed on the heating roller side with respect to the nip surface between the rollers so that a header of the sheet to be printed is in contact with the heating roller first, and a downstream end of the fixing device introduction guide member is concavely curved. | 07-30-2009 |
20090208229 | Image Forming Apparatus - An image forming apparatus includes an endless belt which is wound around a plural rollers and conveys a recording medium in a conveying direction; a plurality of image forming units which sequentially form images on the recording medium conveyed by the endless belt in an overlap manner; a fixing unit which is provided at a downstream of the endless belt in the conveying direction; a first detection unit which detects a temperature of a roller closest to the fixing unit; a second detection unit which detects a temperature of the endless belt; an error calculation unit which calculates an error of a conveying speed of the recording medium based on a difference between the detected temperatures, and a number of a recording medium, on which images are next to be formed; and a compensation unit which compensates the error calculated by the error calculation unit. | 08-20-2009 |
20090220258 | IMAGE FORMING APPARATUS - An image forming apparatus is provided. When a user inputs a print request, life count values stored in a life management section are read out. A table of correlation between the life count values and a rotating speed of a driving roller is looked up, a rotating speed of the driving roller corresponding to the life count values read out is determined at which the driving roller is set to rotate. With the driving roller rotating at the set rotating speed, a printing process is performed so that a transfer belt turns at a constant running speed. Following the printing process, the life count values are updated based on the latest total number of printed copies and the latest revolving speed of the transfer belt. | 09-03-2009 |
20090220259 | Image Forming Apparatus, Image Forming Method and Image Forming Program - An image forming apparatus includes an image forming unit that forms multicolor toner images superposed on a transfer belt. A sensor is disposed in an image formation region and detects a pattern on the transfer belt. A controller determines, when image data is received, whether or not a region of a toner image based on the image data will be superposed on a region of the pattern. The controller controls the image forming unit to form the toner image based on the image data and the pattern simultaneously on the transfer belt when the controller determines that the region of the toner image based on the image data will not be superposed on the region of the pattern. | 09-03-2009 |
20090245822 | IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND COMPUTER PROGRAM PRODUCT - A patch-pattern forming unit causes an image forming unit to form a patch pattern including a plurality of patches on a conveying member. A detecting unit detects the patch pattern formed on the conveying member. An adjusting unit adjusts an image forming condition of the image forming unit based on a result of detection by the detecting unit. The patch pattern has a length substantially equal to a distance between a patch-pattern start position, which is located at a space corresponding to at least a predetermined margin of a recording medium from a position of the image, and a position of the detecting unit. | 10-01-2009 |
20090285589 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member for bearing a toner image; toner image forming means for forming a toner image on the image bearing member; a detecting member for directing light to an object and for detecting the light reflected by the object; a controller for controlling a toner image forming condition of the toner image forming means in accordance with an output of the detecting member with respect to the toner image formed on the image bearing member and an output of the detecting member with respect to the image bearing member; a cleaning member, in contact to the image bearing member, for cleaning the image bearing member; an executing portion for executing, when the output with respect to the image bearing member reaches a reference level, an operation in a cleaning mode in which the cleaning member cleans the image bearing member; and a change portion for changing the reference level in accordance with a use amount of the image bearing member. | 11-19-2009 |
20090297182 | IMAGE FORMING APPARATUS - An image forming apparatus which predicts VL fluctuations of a photosensitive drum in consideration of a double-sided print mode, and performs an image formation control based on the prediction, and thus always obtains a stable density image. The image forming apparatus performs an appropriate image formation control by controlling an image forming condition based on a photosensitive member rotation time, a photosensitive member stop time, a temperature of an atmospheric environment, an absolute humidity of the atmospheric environment, and whether an image formation that precedes a subsequent image formation is performed in single-sided printing or double-sided printing. | 12-03-2009 |
20090310989 | IMAGE FORMING APPARATUS - An image forming apparatus which is free from occurrence of image noise due to the bleed phenomenon even without providing any contact-and-separation mechanism for the transfer member includes a control device which counts stop time elapsing from a stop to a restart of the image carrier, calculates an avoidance sheet count corresponding to the stop time at a restart of the image carrier, and makes a toner image carried on only part of the image carrier that has been out of the nip against the transfer member during the stop of the image carrier until the avoidance sheet count is reached after the restart of the image carrier. | 12-17-2009 |
20090310990 | IMAGE FORMING APPARATUS EXECUTING STABILIZATION PROCESS AT PROPER FREQUENCY - In an MFP, when a count of printed sheets of paper exceeds a predetermined count, a controller reads, from internal counters, a frequency of a stabilization process executed in return, a frequency of a stabilization process executed automatically in printing, a frequency of a stabilization process executed manually based on a user's instruction, and a frequency of return, respectively. When the frequency of the stabilization process executed automatically is small while the frequency of the stabilization process executed manually is large, the controller raises a frequency level of execution of the stabilization process. When the frequency of the stabilization process executed manually is small, the controller lowers the frequency level of execution of the stabilization process. | 12-17-2009 |
20090324265 | IMAGE FORMING APPARATUS - An image forming apparatus includes a control mechanism capable of selecting a plurality of print modes and a fixing device fixing an image developed based on one of the print modes selected by the control mechanism. The control mechanism selects any one of the print modes based on a successive print sheet number determined by print information received from a host device and a power consumption amount of each of the print modes calculated from fixing temperature of the fixing device prior to starting print operation. | 12-31-2009 |
20100008681 | Image forming apparatus, computer program product for forming image, and image forming method - A first calculating unit calculates an allocation time required for forming a patch pattern. A second calculating unit calculates a maximum patch-pattern length of the patch pattern that can be formed within the allocation time based on the number of patch patterns that can be formed within the allocation time. A setting unit calculates a difference between an environmental temperature around the image forming apparatus and an environmental temperature at which the image forming condition stored in the storing unit is set, and newly sets an image forming condition for the patch patterns based on a result of comparing the difference with a predetermined threshold. | 01-14-2010 |
20100028030 | IMAGE FORMING APPARATUS AND POWER-SUPPLY CONTROL METHOD - A detecting unit detects a usage state of a charge storage unit for each predetermined time period. A setting unit determines whether the usage state of the charge storage unit satisfies a predetermined condition for each time period, and when it is determined that the usage state satisfies the predetermined condition, sets a corresponding time period as a charge-use permitted time. A control unit determines whether a current time falls in the charge-use permitted time, and when it is determined that the current time falls in the charge-use permitted time, allows a discharging unit to discharge the charge storage unit. | 02-04-2010 |
20100040385 | IMAGE FORMING APPARATUS AND PAPER DISCHARGE SPEED CONTROL METHOD FOR IMAGE FORMING APPARATUS - A sheet temperature sensor which detects temperature of a recording medium that is fed is provided downstream in a sheet feeding direction from a fixing device. A controller counts the number of sheets on which an image is continuously formed, and controls the number of sheets discharged by the fixing device per unit time in accordance with the counted number of sheets and the temperature detected by the sheet temperature sensor. | 02-18-2010 |
20100046969 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An image forming apparatus and a control method thereof to improve quality of an image in consideration of a change in posture of a print media. The image forming apparatus can include a transferred unit on which a visible image is formed, a transferring unit to form a transfer region through which the visible image is transferred onto a print medium, along with the transferred unit, a bias supplying unit to supply bias to the transferring unit so that a transfer electric field is produced in the transfer region, and a controller to control the bias supplying unit to supply different first to third biases to the transferring unit while at least first to third regions of the print medium pass through the transfer region, respectively. | 02-25-2010 |
20100061744 | IMAGE FORMING APPARATUS AND METHOD TO CLEAN STAINED PORTION OF IMAGE FORMING APPARATUS - An image forming apparatus including a case, a printing medium feeding unit disposed in the case to feed printing media, an image forming unit disposed in the case to form images on a printing medium fed from the printing medium feeding unit using developer and to include at least one portion being stained when the images are formed, and a control portion to control the image forming unit to form the images in a plurality of print modes. The control portion sends a cleaning command to clean the at least one stained portion when the amount of the developer used by the image forming unit reaches a reference amount of the developer or when the number of the printing media supplied by the printing medium feeding unit reaches a reference value of the number of the printing media. | 03-11-2010 |
20100061745 | IMAGE FORMING APPARATUS - An image forming apparatus including a carriage including image forming units, the carriage driven reciprocally in a main scanning direction; a conveyance unit to convey a sheet of recording media to a position where the image forming units perform image formation; a first detector provided to the carriage, the first detector including a light emitting part and a light receiving part to periodically detect a surface of the sheet; a calculation unit to calculate a relative amount of movement between the sheet and the image forming units by comparing patterns periodically detected by the first detector; and a control unit to control a timing to perform image formation by the image forming units and an amount of conveyance of the sheet conveyed by the conveyance unit based on a result calculated by the calculation unit. | 03-11-2010 |
20100092189 | IMAGE FORMING APPARATUS, SHEET-FEED CONTROL METHOD, AND COMPUTER PROGRAM PRODUCT - A sheet is placed on a sheet feed unit. A main-scanning sensor detects first detection information for identifying a sheet size in a main-scanning direction and a sub-scanning sensor detects second detection information for identifying a sheet size in a sub-scanning direction. A sheet sensor detects presence of the sheet on the sheet feed unit. It is monitored whether the sheet sensor has detected a sheet and a timer starts counting a first elapsed time from a time point at which the sheet sensor detects a sheet. A size identifying unit identifies, when the first elapsed time exceeds a first predetermined set time, a sheet size based on the first and the second detection information. | 04-15-2010 |
20100098445 | IMAGE FORMING APPARATUS - An image forming apparatus for printing an image on a continuous print medium includes an image processing unit for converting print data received to image data printable; a developer image forming unit for forming a developer image using specific developer according to the image data; a transfer unit for transporting the continuous print medium and transferring the developer image to the continuous print medium; and a control unit for instructing timings of the developer image forming unit to form the developer image and the transfer unit to transport the continuous print medium when the control unit receives a conversion process completion notice from the image processing unit. Further, it is arranged so that an initialization operation of the developer image forming unit is performed before the developer image forming unit forms the developer image. | 04-22-2010 |
20100104300 | IMAGE FORMING APPARATUS - In case of printing of a monochrome image is performed and the number of counts of a K-counter reaches a predetermined number, a K developing device forcibly consumes a toner when a printing ratio is lower than a predetermined value, and does not forcibly consume the toner when the printing ratio is equal to or higher than the predetermined value. When the number of counts of the K counter reaches the predetermined number, necessary amounts of toners are supplied to developing devices for all colors for Y, M, C, and K according to detection results of auto toner sensors. | 04-29-2010 |
20100150586 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member; a plurality of developing devices, contactable to the image bearing member, for developing a latent image on the image bearing member with toner; a rotatable member for rotatably supporting the plurality of developing devices; a detecting device for detecting a position of the image bearing member, wherein on the basis of an output of the detecting device, the rotatable member is rotated; and a control device for changeably controlling a period from timing of detection by the detecting device to timing of contact of one of the plurality of developing device, rotated by the rotatable member, to the image bearing member. | 06-17-2010 |
20100183322 | Image forming apparatus - In an image forming apparatus, a rotation detector detects an angular velocity or an angular displacement of a shared drive motor, or an angular velocity or an angular displacement of a photosensitive element. A drive control unit executes a process for controlling a drive speed of a drive source of the photosensitive element based on a result of detection by the rotation detector. | 07-22-2010 |
20100196025 | IMAGE FORMING APPARATUS, IMAGE FORMING SYSTEM, AND RECORDING MEDIUM FOR PERFORMING IMAGE FORMING METHOD - An image forming apparatus including a receiving part for receiving an image forming request, a conveyor belt for rotating and conveying a recording paper, a charging part for applying charges to the conveyor belt, and an image forming part for forming an image on the recording paper is disclosed. The image forming apparatus includes a cleaning part configured to clean a surface of the conveyor belt by rotating the conveyor belt and setting a contacting member in contact with the surface of the conveyor belt when a bias voltage of the charges is reduced. The cleaning part is configured to clean the surface of conveyor belt when a printing process and a post-printing process are completed by the image forming part and no subsequent image forming request is received by the receiving part. | 08-05-2010 |
20100209126 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device includes: a developing roller on the surface of which intersecting inclined grooves are formed by rolling working; and a seal member which comes into contact with the developing roller, wherein ridge portions of a convex portion surrounded by the inclined grooves of the surface of the developing roller are formed such that rotational resistance due to the contact of the seal member on the downstream side of a rotation direction opposite to a rotation direction of the developing roller at the time of development is larger than rotational resistance due to the contact of the seal member on the downstream side of a rotation direction of the developing roller at the time of development, and at the time of refreshing of the seal member, the developing roller is rotated in the opposite direction to a direction at the time of development. | 08-19-2010 |
20100226666 | IMAGE FORMING APPARATUS - An image forming apparatus of the present invention includes: an image carrier on whose surface is formed a latent image; a developing unit that forms a developer image with a developer including toner, carrier and additive; a transfer unit that transfers the developer image onto a recording medium; a recovery member that recovers the developer remaining on the surface of the image carrier after the developer image is transferred; a supply member that supplies, to the image carrier, a recovery promoter; and a voltage application unit that applies, to the supply member, an alternating-current voltage whose amplitude is changed in accordance with a change in the percentages of the amount of toner and the amount of carrier per unit area of a developer image forming portion of the developing unit. | 09-09-2010 |
20100239276 | IMAGE FORMING DEVICE AND COMPUTER-READABLE RECORDING MEDIUM - An image forming device includes an image support object, a charging unit, an exposure unit, and a developing unit. The image forming device further includes a monitoring unit that sequentially updates a count value to a new count value according to a rotation state and a stop state of the image support object, and an intermittent driving unit that intermittently rotates the image support object according to the new count value generated by the monitoring unit after an image formation operation to form the toner image on the image support object surface is completed. | 09-23-2010 |
20100239277 | IMAGE FORMING APPARATUS, PRINTING OPERATION CONTROL METHOD AND COMPUTER-READABLE INFORMATION RECORDING MEDIUM - An image forming apparatus includes a photosensitive member driving part that drives a photosensitive member, a counting part that carries out an adding operation when the photosensitive member driving part drives the photosensitive member, and carries out a subtracting operation when the photosensitive member driving part stops the photosensitive member; and a control part that interrupts, when a count value of the counting part becomes equal to or more than a first predetermined value, a printing operation of driving the photosensitive member, forming an electrostatic latent image on the photosensitive member, and fixing a toner adhering to the photosensitive member onto a recording sheet, and causes the counting part to start the subtracting operation. | 09-23-2010 |
20100239278 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image forming section attached on an apparatus main body, having a forming and writing section that forms and writes an electrostatic latent image on an image carrier based on image information, and a transfer section which transfers a developed image after the electrostatic latent image has been developed, onto a sheet; a sheet conveyance section detachably attached on the apparatus main body, which conveys the sheet to the image forming section; a sheet detection section attached on the apparatus main body, which detects a sheet position conveyed to the image forming section by the sheet conveyance section; and a position correction section which corrects an image writing position for an image in the image forming section based on information of the detected sheet position. | 09-23-2010 |
20100247120 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image forming device, a time detection unit, a humidity measurement unit and a controller. The image forming device includes a photoconductive body, a developing device and a transfer device. The time detection unit detects information concerning a stop time period of the developing device. The humidity measurement unit is provided in a casing in which the image forming device is provided and measures a humidity. The controller controls a developer supply member in the developing device based on the information concerning the stop time period detected by the time detection unit and information concerning the humidity measured by the humidity measurement unit, so as to rotate at a lower speed than a rotation speed at a normal time before the developing device starts a first developing operation after the developing device stopped. | 09-30-2010 |
20100247121 | IMAGE FORMING APPARATUS - An image forming apparatus is configured to control the timing to switch a development unit by a development rotary after forming an image, based on the size of the image to be formed. Accordingly, if the switching of the development unit is completed within a time period corresponding to a trailing edge margin of an image area, a subsequent color image can be formed without idling an intermediate transfer member, so that the image forming apparatus can suppress or reduce degradation of the throughput. | 09-30-2010 |
20100266301 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes: an image carrier; a developer carrier configured to supply developer to the image carrier; a power supply unit configured to apply a voltage to the developer carrier; a drive unit configured to rotationally drive the image carrier and developer carrier; a rotation amount determiner configured to determine the amount of rotation of the image carrier or the developer carrier in a predetermined time period; and a drive control unit configured to instruct the drive unit to rotate the image carrier and the developer carrier in a non-printing state, when it is determined that the rotation amount in a printing operation in the predetermined time period was equal to or greater than a threshold. | 10-21-2010 |
20100272455 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image carrier that carries an electrostatic latent image; a development device that includes a toner carrier which is disposed opposite to the image carrier, carries and supplies toner to the image carrier, and develops the electrostatic latent image formed on a surface of the image carrier; and a control means that performs a refresh process in which toner is ejected from the toner carrier to the image carrier in a time an image is not formed, and a toner ejection pattern which is formed by ejecting a line image a plurality of times that has an acute angle to a main scan direction at predetermined intervals in a circumferential direction of the image carrier over a total width of a development region. | 10-28-2010 |
20100296826 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image carrier on which an electrostatic latent image is formed; a developer carrier being in contact with the image carrier and configured to develop the electrostatic latent image on the image carrier with a developer; a temperature humidity measurement unit configured to measure the temperature and humidity around the developer carrier; a pressure changing mechanism configured to change a pressure of a contact between the image carrier and the developer carrier; and a pressure controller operable to change, based on the temperature and humidity measured by the temperature humidity measurement unit, the pressure by controlling the pressure changing mechanism. | 11-25-2010 |
20100303485 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes a receiver to receive image information from an external device, a movable intermediate transfer member, a plurality of latent image bearing members on which a latent image is formed based on the image information, a plurality of developing devices, each of which disposed in proximity to the latent image baring member, to develop the latent image on the latent image bearing member with toner to form a toner image thereon, a transfer bias application mechanism to apply a transfer bias to the intermediate transfer member and halt temporarily and periodically application of the transfer bias in a continuous output mode in which a plurality of images are continuously formed on different recording media sheets based on the image information of the plurality of images received continuously by the receiver, and a secondary transfer member to transfer the superimposed toner image onto a recording medium. | 12-02-2010 |
20100303486 | IMAGE FORMING APPARATUS - An image forming apparatus includes a toner carrying member for supplying toner to the image bearing member to visualize the latent image; a rotatable toner supply member, contacted to the toner carrying member, for supplying the toner to the toner carrying member, the toner supply member including a surface foam layer; a voltage applying device for applying voltages to the toner carrying member and the toner supply member; a controller for controlling the voltage application apparatus such that A and B have a polarity which is the same as a regular charging polarity of the toner, where A=Vs | 12-02-2010 |
20100316397 | IMAGE FORMING APPARATUS - An image forming apparatus includes a charging unit, an image carrier, an exposing unit, a developing unit, a transfer belt on which the transfer material is placed, a fixing unit that fixes the toner image transferred onto the transfer material, a cleaning unit that cleans up toner attached to the fixing unit, and a control unit that controls printing of the image on the transfer material. The control unit causes the exposing unit to expose a latent image of a first image having an image-area ratio equal to or larger than a predetermined ratio, causes the developing unit to form a toner image of the latent image and to transfer the toner image to the transfer material, and causes the fixing unit to fix the toner image transferred by the transfer belt to the transfer material. | 12-16-2010 |
20110158664 | IMAGE FORMING APPARATUS - Provided is an image forming apparatus capable of performing stable charging and thus stable image formation over a long term by changing a charge control method based on various environments. An engine control section serves as a first applied voltage determining unit, obtains a relationship between an applied voltage and a discharge current amount to a charging roller, and determines a voltage value of an applied voltage corresponding to a predetermined discharge current amount. The engine control section serves as a second applied voltage determining unit and determines a voltage value of a voltage to be applied to the charging roller based on the environment information detected by the environmental sensor. The engine control section selects, as the voltage to be applied to the charging roller, any one of the voltage values determined by the first and the second applied voltage determining units based oh the environment information. | 06-30-2011 |
20110164890 | METHOD AND APPARATUS FORMING IMAGE - According to one embodiment, a fuser including, a heating unit configured to heat a toner to be fixed on a sheet medium and the sheet medium and including at least three heat sources that can be independently driven, a temperature detecting unit configured to detect temperature of the heating unit in at least two positions spaced apart in a longitudinal direction of the heating unit, and a control unit configured to change power supply to the heat sources of the heating unit according to elapse time from the power supply to the heat sources, a number of sheet media to be continuously processed, and a type of the sheet media. | 07-07-2011 |
20110217058 | Image forming apparatus - An image forming apparatus includes an image forming unit forming an image on a sheet transported along a transport path in a printing operation; a sheet stacking unit in which the sheet ejected at the end of the transport path is stacked; a sheet detecting unit detecting the presence or absence of the sheet in the transport path; a counting unit counting number-of-sheet data of the sheet detected by the sheet detecting unit; and a control unit controlling the printing operation in accordance with a first print request from a print instructing unit for a print job and based on a count value obtained by the counting unit. The control unit clears the count value in the absence of a next print request from the print instructing unit within a predetermined time after completion of the printing operation. | 09-08-2011 |
20110217059 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member for bearing a developer image; a developing device including a developer carrying member for forming the developer image on the image bearing member; a fixing device for fixing the developer image on a sheet material, on which the developer image has been transferred, by heating the sheet material; a memory medium for storing an operation hysteresis value, of the developing device, which varies depending on a state of an operation of the developing device from start of the operation; and a controller for controlling a temperature of the fixing device. The controller controls, when the operation hysteresis value stored in the memory medium reaches a preset threshold, the temperature of the fixing device so as to be lower than that before the operation hysteresis value reaches the preset threshold. | 09-08-2011 |
20110229166 | IMAGE FORMING APPARATUS - An image forming apparatus includes: a heating device that heats images that have been formed on a sheet-like recording medium to thereby fix the images to the recording medium; an ejection member that rotates in a forward direction and ejects to the outside the recording medium that has been conveyed from the heating device; a blower member that blows air onto the recording medium conveyed between the heating device and the ejection member; and a controller that controls the blower member such that the blower member operates when a recording page count where images are continuously formed on the recording medium is equal to or greater than a predetermined recording page count. | 09-22-2011 |
20110229167 | IMAGE FORMING APPARATUS - An image forming apparatus includes a sheet supply unit for supplying a printing medium; and a sheet discharge unit for discharging the printing medium after an image is transferred to the printing medium. Further, the image forming apparatus includes a transport path medium number storage unit for storing a transport path medium number; a discharge number storage unit for storing a discharge number; an upper limit print number storage unit for storing an upper limit print number; an addition unit for calculating an addition sum of the discharge number and the transport path medium number; a number comparison unit for comparing the addition sum with the upper limit print number; and a sheet supply stop unit for stopping the sheet supply unit when the addition sum exceeds the upper limit print number. | 09-22-2011 |
20110243587 | IMAGE PRINTING METHOD WITH REDUCED BANDING - Cross-track banding artifacts and wear in an electrophotographic (EP) print engine are reduced. A development member and a supply member are disposed so that charge is transferred between them in a charge-transfer region. The members are retained in a first position with respect to each other for a first dwell time, and neither member is rotated during the first dwell time, so that charge is transferred between members in the charge-transfer region. One of the members is rotated so that at least one point on one of the members is moved out of the charge-transfer region. The members are retained in a second position with respect to each other for a second dwell time that is greater than the time for one revolution of the development member, wherein neither member is rotated during the second dwell time. | 10-06-2011 |
20110262156 | IMAGE FORMING APPARATUS, CONTROL DEVICE, DETECTING METHOD OF REFERENCE INDEX ON TRANSFER BODY, AND COMPUTER READABLE MEDIUM - An image forming apparatus includes: a latent image forming unit scanning and exposing an image carrier according to image data, to form a latent image; a transfer body on which a toner image is transferred and a reference index for setting an output start time point of the image data is formed; a detecting unit facing the reference index and outputting a detection signal changing in accordance with passing of the reference index; and a controller controlling the output start time point with the detection signal. The controller starts a first period during which change of the detection signal is ignored, according to first change of the detection signal, starts a second period after the first period, regards second change of the detection signal occurring first in the second period as a reference of the output start time point, and ignores change of the detection signal after the second change. | 10-27-2011 |
20110262157 | IMAGE FORMING APPARATUS AND IMAGE STABILIZATION CONTROL METHOD IN IMAGE FORMING APPARATUS - According to one embodiment of the present invention, an image forming apparatus includes: an image formation unit; an image formation frequency count unit; a first control unit; a target contrast potential determination unit, and a second control unit. The image formation unit forms an image pertaining to a print job input from an external on an image carrier. The image formation frequency count unit counts an image formation frequency of the image in the image formation unit. The first control unit controls the image formation unit, and executes a first image stabilization mode for adjusting a development bias voltage on the basis of a concentration of a pattern image formed on the image carrier. The target contrast potential determination unit determines a target contrast potential which is a target value of a potential difference between a potential of the image carrier after exposed and a potential of a developing device, when the print job is a continuous print job of the same image according to the image formation frequency counted in the continuous print job. The second control unit executes a second image stabilization mode for adjusting a development bias on the basis of the target contrast potential under execution of the continuous print job with the develop bias at the time of completing the first image stabilization mode executed by the first control unit as a reference value. | 10-27-2011 |
20110262158 | IMAGE FORMING APPARATUS AND METHOD OF FORMING IMAGE - An image forming apparatus includes a fixing unit fixing toner images to paper sheets, a timing adjusting unit adjusting the timing of supplying paper sheets to the fixing unit, a temperature detecting unit detecting the temperature of a predetermined section of a heating rotating body included in the fixing unit, and a timing control unit selecting a first mode or a second mode immediately after start-up of the image forming apparatus in accordance with whether the number of paper sheets to be printed exceeds a predetermined number, wherein in the first mode, when the temperature detected by the temperature detecting unit exceeds a first temperature, the first paper sheet is supplied to the fixing unit and, in the second mode, when the detected temperature exceeds a second temperature different from the first temperature, the first paper sheet is supplied to the fixing unit. | 10-27-2011 |
20110274452 | IMAGE FORMING APPARATUS AND PHOTOCONDUCTIVE MEMBER CLEANING METHOD IN THE IMAGE FORMING APPARATUS - According to one embodiment, an image forming apparatus includes an image bearing member, a developing device, a cleaning executing section, and a potential adjusting section. An electrostatic latent image is formed on the image bearing member. The developing device stores a two-component developer including a toner and a carrier, includes a toner carrying member, which carries the two-component developer, arranged to be opposed to the image bearing member, and forms a toner image corresponding to the electrostatic latent image on the surface of the image bearing member. The cleaning executing section performs cleaning of the image bearing member. The potential adjusting section adjusts, during the cleaning, development contrast potential, which is a potential difference between the electrostatic latent image potential of the image bearing member and the potential of the developing device, such that the carrier adheres to the image bearing member together with the toner. | 11-10-2011 |
20110293299 | IMAGE FORMING APPARATUS, CONTROL DEVICE, DETECTING METHOD OF REFERENCE INDEX ON TRANSFER BODY, AND COMPUTER READABLE MEDIUM - An image forming apparatus includes: a latent image forming unit forming a latent image; a transfer body on which a reference index for setting an output start time point of image data is formed; a detecting unit facing the reference index and outputting a detection signal changing in accordance with passing of the reference index; a measuring unit measuring change duration time; and a controller controlling the output start time point with the detection signal. The controller starts a first period during which change of the detection signal is ignored, according to first change of the detection signal, starts a second period after the first period, regards change of the detection signal occurring first in the second period as a reference of the output start time point if the change duration time is longer than a predetermined period, and ignores change of the detection signal after the change occurring first. | 12-01-2011 |
20110293300 | IMAGE FORMING APPARATUS - An image forming apparatus including an image bearing member; a developing device for developing with toner an electrostatic latent image formed on the image bearing member; a humidity sensor for providing information on ambient humidity of said image forming apparatus; and a controller for controlling a parameter on a density of an image to be formed on a recording material on the basis of pieces of the information provided by the humidity sensor at different times. The controller is capable of controlling the parameter so that, when a first image forming job is ended at an ending time and then a second image forming job is executed after a lapse of a predetermined time from the ending time and in a period in which a detection result of the humidity sensor changes and then is constant, a difference between a first set value which is the parameter set during formation of a final image in a first image forming job and a second set value which is the parameter set during image formation on a first sheet in the second image forming job after the lapse of the predetermined time from the ending time, increases with an increase of proportion of a time in which the developing device is driven during the lapse of the predetermined time. | 12-01-2011 |
20110299864 | REMOVING TONER FROM LONGITUDINAL MEMBER IN PRINTER - Apparatus for removing toner after a selected time interval from a longitudinal member in a dry electrophotographic printer for printing a visible image on a receiver. An end block is disposed at one end of a rotatable development member, and a longitudinal member is disposed adjacent to the development member or photoreceptor and is connected to the end block. A backup bar is disposed adjacent to the photoreceptor and can selectively make physical contact with at least one point on the end block. When a measured time interval of printer operation reaches the selected time interval, a controller causes the backup bar to apply a selected force to the end block to cause toner on the longitudinal member to be removed from the member. | 12-08-2011 |
20110299865 | PROCESS CONTROL WITH LONGITUDINAL MEMBER TONER REMOVAL - A dry electrophotographic printer is operated to remove toner from a longitudinal member. A process-control time interval, and a cleaning time interval that is a positive multiple thereof, are selected. Prints are produced until the process-control time interval elapses, as measured by a timing device. A process-control patch is produced in a process-control frame. This is repeated until the cleaning interval has elapsed. In the process-control frame, after the cleaning interval elapses, the photoreceptor and development member are spaced apart, then, after a selected time delay, brought into operational relationship, so that a stop at one end of the photoreceptor contacts an end block at one end of the development member, and toner is removed from the longitudinal member, which is connected to the end block. | 12-08-2011 |
20110311248 | IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING IMAGE DEFECT - Disclosed is an image forming apparatus, including: a toner image forming unit that includes an image carrier forming toner images by supplying toner to formed electrostatic latent images and transferring the formed toner images; a cleaning member that is in contact with the image carrier and removes the toner remaining in the image carrier after the toner images are transferred; a spacing part that spaces the cleaning member from the image carrier; an environment information acquisition unit that acquires information regarding temperature or humidity that is environment information, in the toner image forming unit; an environment determination unit that determines whether the temperature or the humidity in the toner image forming unit satisfies a reference by using the environment information; and a control unit that controls the spacing part to space the cleaning member from the image carrier when it is determined that the temperature or the humidity in the toner image forming unit does not satisfy the reference. | 12-22-2011 |
20120087682 | IMAGE FORMING APPARATUS, PRINTING METHOD APPLICABLE TO IMAGE FORMING APPARATUS, AND COMPUTER PROGRAM FOR IMPLEMENTING A PRINTING PROCESS CARRIED OUT BY IMAGE FORMING APPARATUS - An image forming apparatus includes a counting section, a storage section, a control section, and a driving member control section. The counting section counts the number of recording media subjected to successive printing. The storage section stores the number counted by the counting section. The control section performs a control process including: setting a power saving mode by selecting a printing speed of the fixing section which is lower than a preset normal speed used in the normal mode while selecting a preset fixing temperature of the fixing section which is lower than a preset normal temperature used in the normal mode when the normal mode is alive while a frequency of successive printing on not more than three recording media is a predetermined percentage or more. The driving member control section switches a current printing speed of the fixing section to a printing speed selected by the control section. | 04-12-2012 |
20120093528 | IMAGE FORMING APPARATUS - An image forming apparatus includes a developing device including a developing roller to bear a developing agent to develop a latent image formed on an image bearing member, a cooling device to reduce an internal temperature of the image forming apparatus, a controller to calculate a travel distance of the developing roller to control the cooling device, and a memory unit to store the total travel distance of the developing roller. The controller calculates the total travel distance of the developing roller every Y minutes in the last X minutes, and a difference between the latest total travel distance of the developing roller and the total travel distance stored Z minutes ago by the memory unit to obtain the total travel distance during Z minutes and operate the cooling device for W minutes after image forming operation where the difference is equal to or greater than a threshold value M. | 04-19-2012 |
20120114343 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes a fixing member, a pressing member, a heating member, a movement mechanism, and a control unit. The fixing member fixes a toner image onto a recording material. The pressing member is pressed against an outer circumferential surface of the fixing member to form a fixing pressure part between the pressing member and the fixing member. The heating member heats the outer circumferential surface of the fixing member. The movement mechanism moves the heating member to contact with and be apart from the fixing member. The control unit controls the movement mechanism to move the heating member relatively apart from the fixing member after a predetermined time elapses after a trailing end of a recording material in a transport direction thereof passes through the fixing pressure part each time when a recording material passes through the fixing pressure part. | 05-10-2012 |
20120141151 | IMAGE FORMING APPARATUS AND TONER SUPPLYING METHOD - An image forming apparatus includes: a first image forming unit including an image carrier, a developing device configured to develop an electrostatic latent image formed on the image carrier and to form a toner image on the image carrier, and a first cleaning unit configured to remove residual toner on the image carrier; a second image forming unit including an image carrier, a developing device having toner in which an external additive has a larger amount than in toner in a developing device of a first image forming unit, the developing device configured to develop an electrostatic latent image formed on an image carrier and to form a toner image on the image carrier, and a second cleaning unit configured to remove residual toner on the image carrier; a transfer body facing the first and second image forming units and configured to convey the toner images transferred respectively from the image carriers at the time of executing a printing process; and a control unit configured to control to transfer the toner image from the image carrier of the second image forming unit to the transfer body at a timing other than the printing process, to reversely transfer the transferred toner image to the image carrier of the first image forming unit, and to supply the reversely transferred toner to a first cleaning unit. | 06-07-2012 |
20120141152 | IMAGE FORMING APPARATUS AND IMAGE BEARING MEMBER DRIVING METHOD - According to one embodiment, an image forming apparatus includes: an input section, an image bearing member, a transfer member, a cleaning section, and a control section configured to calculate, if the number of continuously printed sheets in one printing job input from the input section is equal to or larger than a first number of sheets, a printing ratio of a document image of the printing job, determine on the basis of the calculated printing ratio whether the image bearing member is caused to perform rotation opposite to the rotation during the transfer, and suspend printing under execution and drive to reversely rotate the image bearing member according to a determination result. | 06-07-2012 |
20120177389 | IMAGE FORMING DEVICE - An image forming device includes a carrying part, an image forming part, a fuser, a fusion temperature controller, a winding part, a storage part and a controller. The controller stops a carrying of recording medium by the carrying part and heating by the fusion temperature controller, after the carrying part carries the recording medium by a predetermined length while the fusion temperature controller heats the fuser, when printing is started in a state where the recording medium is not wound on the winding part, and resumes the carrying of the recording medium by the carrying part and the heating by the fusion temperature controller upon detection that the time measured by the measurement part has reached the stop time for the recording medium stored in the storage part. | 07-12-2012 |
20120263483 | PRINT CONTROL APPARATUS AND CONTROL METHOD THEREOF - A print control apparatus that controls a printing unit is provided. A determination unit determines print quality of a print image printed by the printing unit. A first counting unit counts the number of pages of each of sets whose print quality is determined by the determination unit not to satisfy a predetermined criterion. A second counting unit counts the number of same pages of the sets whose prnt quality is determined by the determination unit not to satisfy a predetermined criterion. A control unit stops printing by the printing unit if a count value counted by the first counting unit reaches a first predetermined value and stops printing by the printing unit if a count value counted by the second counting unit reaches a second predetermined value. | 10-18-2012 |
20120321330 | LUBRICANT SUPPLYING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS - A lubricant supplying device includes a lubricant supplying roller configured to rotate in a certain direction and makes a sliding contact with an image carrier on which a toner image is carried; a solid lubricant arranged to slide in contact with the lubricant supplying roller; a changing unit configured to change a revolution of the lubricant supplying roller to adjust an amount of the solid lubricant supplied onto the image carrier; and a calculation unit configured to obtain a product life or total consumption of the solid lubricant from a total running distance or total operating time of the image carrier or the lubricant supplying roller, the product life or the total consumption of the solid lubricant being corrected based on the amount of the solid lubricant supplied onto the image carrier. | 12-20-2012 |
20130011149 | IMAGE FORMING APPARATUS AND METHOD FOR CONTROLLING IMAGE FORMING APPARATUS, WHICH INCLUDES FIXING AND DECOLORIZING SECTION - An image forming apparatus includes a count section configured to count time during which no image forming is performed and a control section configured to allow heating of a heat generating section at temperature for decolorizing after the time counted by the count section reaches the a predetermined threshold time. | 01-10-2013 |
20130011150 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An image forming apparatus includes an operation progressing condition that is considered when the image forming apparatus enters an apparatus protection mode. Further, a method of controlling the image forming apparatus includes receiving an apparatus protection mode entry condition of the image forming apparatus, detecting the temperature of the image forming apparatus or the number of continuously printed sheets, judging whether or not the apparatus protection mode entry condition is satisfied, if the temperature of the image forming apparatus is higher than a predetermined temperature or the number of continuously printed sheets is greater than the predetermined number of sheets, and maintaining a basic printing operation of the image forming apparatus, if the apparatus protection mode entry condition is not satisfied, thereby increasing user's satisfaction and operation efficiency. | 01-10-2013 |
20130058667 | CHARGING DEVICE AND IMAGE FORMING APPARATUS - A charging device includes a charging member and a pulling device. The charging member charges a surface of an image carrier and includes a charging member body and axial-end members. The charging member body is arranged so as to face the image carrier and extends along an axial direction of a rotation shaft of the image carrier. The axial-end members are supported at both ends of the charging member body in the axial direction and do not extend through the inside of the charging member body in the axial direction. The pulling device pulls the charging member in the axial direction. | 03-07-2013 |
20130108288 | IMAGE FORMING APPARATUS CAPABLE OF REDUCING IMAGE DENSITY IRREGULARITY | 05-02-2013 |
20130108289 | Image Forming Apparatus | 05-02-2013 |
20130108290 | IMAGE FORMING APPARATUS | 05-02-2013 |
20130177328 | IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive member (drum); a rotatable charging member for electrically charging the drum; a bias applying device for applying a charging bias to the charging member in the form of a DC voltage biased with an AC voltage; a current detector for detecting an AC current passing between the charging member and the drum; a temperature and humidity detector; a setting device for setting a condition of the charging bias on the basis of a plurality of detected AC currents passing between the charging member and the drum when a plurality of AC voltages depending on an output of the temperature and humidity detector are applied to the charging member; and a corrector for correcting the set condition of the charging bias on the basis of an output of the current detector when a predetermined AC voltage is applied to the charging member. | 07-11-2013 |
20130259497 | IMAGE FORMATION APPARATUS AND METHOD OF ADJUSTING DEVELOPER DISCARD AMOUNT FOR THE SAME - An image formation apparatus includes an exposure unit to form an electrostatic latent image with image dots on a rotatable image carrier by exposing the image carrier to irradiation light, a development unit to form a developer image by attaching a developer to the electrostatic latent image, a voltage supply unit to supply the development unit with a development voltage, a cleaning unit to clean up the developer left on the image carrier after the development, and a developer discard amount controller to control an amount of the developer to be forcibly attached to the image carrier based on a total rotation number of the image carrier if the number of image dots printed during a prescribed number of rotations of the image carrier is smaller than a reference value, and to forcibly attach the controlled amount of the developer to the image carrier to discard the developer. | 10-03-2013 |
20130308967 | IMAGE FORMING APPARATUS - An image forming apparatus includes first and second developer carrying members and a control device. The apparatus is operable in a first mode where an image of a single color is formed using the first developer carrying member and is operable in a second mode, wherein an image of a plurality of colors is formed using the first and second developer carrying members. The control device controls a first discharging operation for discharging developer from the first developer carrying member and a second discharging operation for discharging developer from each of the first and second developer carrying members. When the apparatus executes only the first mode, the control device performs more image formations, in a period between completion of the second discharging operation and start of the first discharging operation, compared to a period between completion of the first discharging operation and start of a subsequent first discharging operation. | 11-21-2013 |
20130336668 | IMAGE FORMING APPARATUS - An image forming apparatus includes first and second image bearing members configured to bear electrostatic latent images, a rotatable belt configured to receive toner images from the first and second image bearing members, and an executing portion configured to execute an operation in a correction mode for determining timing at which formation of the electrostatic latent image starts on at least one of the first and second image bearing members with respect to a widthwise direction of the belt between test toner images transferred onto the belt from the first and second image bearing members. In addition, first and second detecting members detect positions of the belt with respect to the widthwise direction, and a calculating portion calculates a movement distance of a predetermined point on the belt with respect to the widthwise direction. An adjusting portion adjusts the timing determined by the executing portion on the basis of a result of the calculation in the correction mode and a result of the calculation of the calculating portion when the image is to be formed in accordance with an image formation signal. | 12-19-2013 |
20140003827 | IMAGE FORMING APPARATUS | 01-02-2014 |
20140064753 | PRINTING APPARATUS - A printing apparatus includes: a conveyor configured to convey a sheet along a conveyance path; a driving device configured to drive the conveyor; a printing device configured to print an image on the sheet conveyed by the conveyor; and a controller. The controller executes a first processing in which, when a first indicator reaches a preset first value, the controller suppresses rise of a temperature in the printing apparatus. The first indicator is a value that changes based on an increase in the number of sheets printed by the printing device. The controller further executes a second processing in which the controller reduces frequency of execution of the first processing when the number of printings performed by the printing device within a set specific period is equal to or greater than a set reference number. | 03-06-2014 |
20140064754 | FIXING DEVICE - A fixing device includes first and second rollers forming a nip for fixing a toner image on a sheet; a heat absorption roller for absorbing heat from said first roller by contacting said first roller; a moving mechanism for moving said heat absorption roller to and away from said first roller; a counter for counting a number of continuously executed fixing process operations without said heat absorption roller contacting said first roller; a controller for determining, based on an output of said counter, whether to carry out an operation of a mode in which said heat absorption roller is contacted to said first roller by said moving mechanism and is rotated for a predetermined period, during non-fixing process period. | 03-06-2014 |
20140064755 | FIXING DEVICE AND CONTROL DEVICE - A fixing device includes a fixing device including rollers which form a nip therebetween to fix a toner image on a sheet; a reciprocating mechanism, including a motor, for reciprocating the fixing device within a predetermined range by moving the fixing device in a longitudinal direction thereof for each passages of a predetermined number of sheets through the nip; and a controller for controlling the motor so that a drive time of the motor per the predetermined number of the sheets is longer in a first range including a point at which a moving direction of the fixing device reverses than in a second range in which the moving direction of the fixing device does not reverse. | 03-06-2014 |
20140205307 | IMAGE HEATING APPARATUS - An image heating apparatus includes: an endless belt configured to heat an image on a sheet at a nip; a heating mechanism configured to heat the endless belt; a fan configured to send air toward a predetermined region of the endless belt; a heat pipe configured to move heat in a direction of uniformizing a temperature distribution of the endless belt with respect to a widthwise direction of the endless belt; and a controller configured to operate the fan such that an air flow rate is larger during heating of the image on a predetermined sheet providing an overlapping positional relationship with the predetermined region, than an air flow rate during the heating of the image on a sheet providing a non-overlapping positional relationship with the predetermined region. | 07-24-2014 |
20140294407 | IMAGE FORMING APPARATUS - The image forming apparatus includes: an image bearing member; a developer storage portion; a developer bearing member; a toner replenishing device that replenishes toner to the developer storage portion; a power supply that supplies an AC voltage or a voltage in which a DC voltage and an AC voltage are superimposed to the developer bearing member at least during an image forming period; and a controller that performs control such that a scattering toner discharge control mode in which the DC voltage only is applied to the developer bearing member in a non-image forming period so as to generate force such that normally charged toner moves from the developer bearing member to the image bearing member so that the toner is discharged from the developer bearing member to the image bearing member. | 10-02-2014 |
20140348521 | IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD EMPLOYED BY THE IMAGE FORMING APPARATUS - An image forming apparatus includes a latent image carrier, a charging device, a latent image forming device, a developing device, a transfer device, a toner amount detector, and a control circuit to execute an imaging condition determination process. The control circuit obtains a linear approximation formula of a developing potential and an amount of toner according to an exposure potential of the patch pattern and a detected amount of toner to calculate a developing gamma and a developing start voltage according to a gradient of the linear approximation formula, determines target charging potential, exposure potential and developing bias according to the developing gamma and the developing start voltage, determines an amount of a background potential to be corrected according to a difference between the developing start voltage and a target developing start voltage obtained according to environmental information, and corrects the target charging potential. | 11-27-2014 |
20150016831 | IMAGE HEATING APPARATUS - An image heating apparatus includes first and second rotatable members configured and positioned to form a nip for heating a toner image on a sheet; a rubbing rotatable member configured to rub a surface of the first rotatable member; a moving mechanism configured to move the rubbing rotatable member relative to the first rotatable member between a rubbing position for carrying out a rubbing process for the first rotatable member and a retracted position retracted the rubbing position; and an executing portion configured to execute the rubbing process in accordance with a number and a kind of the sheet processed by the image heating apparatus. | 01-15-2015 |
20150104205 | CONTROLLING APPARATUS, IMAGE HEATING APPARATUS AND IMAGE FORMING APPARATUS - A controller for controlling an image heating device which includes first and second rollers for heating therebetween a toner image on a sheet, a first rubbing roller for rubbing the first roller, and a second rubbing roller for rubbing the second roller, said controller including a counter configured to count a number of heated sheets; a first executing portion configured to execute rubbing by the first rubbing roller in accordance with an output of the counter; a second executing portion configured to execute rubbing by the second rubbing roller in accordance with an output of the counter; an acquiring portion execution instructions of an image glossiness improving mode operation provided by an operator; and a determination portion configured to determine which roller or rollers of the first second rollers is to be rubbed in accordance with an output of the counter, when the acquiring portion acquires the execution instructions. | 04-16-2015 |
20150301489 | IMAGE FORMING APPARATUS - An image forming section forms a printed image on paper based on image data. A post-printing processing section performs post-printing processing on the paper. A stabilization section performs stabilization on image data. A sheet interval detection section detects a sheet interval between consecutive sheets being conveyed in the post-printing processing section. A sheet interval determination section determines whether or not the sheet interval exceeds a reference period of time. A cumulative time measuring section measures a cumulative total time of an image formation operation. A time determination section determines whether or not the cumulative total time exceeds a predetermined period of time. A control section controls, upon determination that the cumulative total time exceeds the predetermined period of time and the sheet interval exceeds the reference period of time, the stabilization section to perform the stabilization during the sheet interval exceeding the reference period of time. | 10-22-2015 |
20160011553 | PRINTING APPARATUS, METHOD OF CONTROLLING THE SAME, AND COMPUTER-READABLE STORAGE MEDIUM | 01-14-2016 |
20160091836 | IMAGE FORMING APPARATUS - When a drive roller is at a stopped state, an execution portion executes a move mode in which a time from when a rotation of a drive roller has been stopped is measured, and based on the measured result, rotation of the drive roller is started and stopped. In the move mode, a portion of a secondary transfer belt having been at a first contact position in the stopped state is moved to a position other than the first contact position and the second contact position, and the rotation of the drive roller is stopped. | 03-31-2016 |
20160132012 | PRINTERS - Printers are disclosed herein. An example printer includes a housing; a non-refillable toner container permanently affixed within the housing, the toner container having a capacity sufficient to store enough toner to print a first number of pages that corresponds to an expected useful life of the printer; and a processor responsive to an input to enable a second number of pages to be printed by the printer, the second number of pages being less than the first number of pages. | 05-12-2016 |