Patent application number | Description | Published |
20080298827 | IMAGE FORMING APPARATUS - An image forming apparatus comprises: an image forming mechanism including a motor, and an image forming unit which operates by the motor to form an image on a recording sheet; a registration unit which registers a job; a control unit which controls the image forming mechanism to form an image corresponding to the job registered through the registration unit on a recording sheet; a number obtaining unit which obtains the number of recording sheets required for the job registered through the registration unit; and a setting unit which sets a rotation speed of the motor according to the number of recording sheets obtained by the number obtaining unit. The control unit controls the image forming mechanism to form the image corresponding to the job registered through the registration unit on the recording sheet by rotating the motor at the rotation speed set by the setting unit. | 12-04-2008 |
20090185834 | Image Forming Apparatus - A toner supply apparatus | 07-23-2009 |
20090232562 | Image Forming Apparatus - A toner supply apparatus | 09-17-2009 |
20090322018 | CONVEYANCE DEVICE AND CONVEYANCE METHOD - A conveyance device includes a motor, a conveyance unit, a movement detection signal output unit, a storage unit, a time measurement unit, a first updating unit, a standby time setting unit, a second updating unit, a manipulated variable determination unit, and a motor driving unit. The standby time setting unit sets a value larger than a parameter value TX stored in the storage unit as a standby time TW. The second updating unit updates the parameter value TX stored in the storage unit to the standby time TW each time the elapsed time measured by the time measurement unit reaches the standby time TW. | 12-31-2009 |
20100067926 | ELECTRONIC DEVICE - An electronic device includes a carriage conveyance unit, a sheet conveyance unit, a failure detection unit, a position detection unit, and a jam determination unit. The carriage conveyance unit includes a motor and conveys a carriage in a main scanning direction by a driving force of the motor. The sheet conveyance unit conveys a sheet in a sub-scanning direction which crosses the main scanning direction in which the carriage is conveyed. The failure detection unit detects a conveyance failure of the carriage. The position detection unit detects a position of the carriage in the main scanning direction. The jam determination unit determines whether or not the conveyance failure is due to jamming caused by interference between the carriage and the sheet, based on the position of the carriage detected by the position detection unit at a time when the conveyance failure is detected by the failure detection unit. | 03-18-2010 |
20100239315 | Image Forming Device Employing Charger for Charging Photosensitive Member - An image forming device includes a photosensitive member and a charger for charging the photosensitive member. The photosensitive member has a photosensitive surface that moves in a moving direction and that is configured to form a latent electrostatic image thereon. The charger opposes the photosensitive surface and includes a wire electrode, a grid electrode and a shield electrode. The wire electrode is applied with a voltage for charging the photosensitive surface. The grid electrode is disposed between the wire electrode and the photosensitive surface. The shield electrode is arranged to partly surround the wire electrode, the shield electrode having a plurality of sections, the shield electrode having an opening at a side the same as the grid electrode with respect to the wire electrode, the shield electrode including a first end and a second end each facing the photosensitive surface, the first end being disposed upstream relative to the second end in the moving direction, the opening being defined between the first end and the second end, a shortest distance being defined between each of the plurality of sections of the shield electrode and the wire electrode and being a length of a straight line that connects the wire electrode and an imaginary plane extending along the each section and that is perpendicular to the imaginary plane, the shortest distances between the respective sections of the shield electrode and the wire electrode being equal to one another, a first distance defined between the first end and a reference plane being smaller than a second distance defined between the second end and the reference plane, the reference plane including the wire electrode and extending perpendicularly to the photosensitive surface. | 09-23-2010 |
20110074856 | Conveyance Device and Image Forming Apparatus - A conveyance device includes a linear encoder that outputs an encoder signal corresponding to displacement of a conveyed object. The encoder includes an encoder fence provided on an intersecting plane that intersects a reference plane orthogonal to a direction in which a guide element supports the conveyed object. The encoder fence is configured such that a plurality of light-transmitting portions and light-shielding portions are arranged alternately on a side of the encoder fence. The light-transmitting portions and the light-shielding portions are formed so that a first point on each boundary between each of the light-transmitting portions and each of the light-shielding portions adjacent to each other and a second point on the each boundary, which is positioned separately from the first point with respect to a direction along the side of the encoder fence and perpendicular to the conveying direction, are separately positioned with respect to the conveying direction. | 03-31-2011 |
20110103847 | Image Forming Apparatus - A toner supply apparatus | 05-05-2011 |
20110188100 | Drive Control Device and Drive Control Method - A drive control device includes a signal generation unit, a position detection unit, a speed detection unit, and a drive control unit. Based on at least one light receiving signal inputted from at least one light receiving unit of an encoder, the signal generation unit digitizes the at least one light receiving signal to generate at least one non-interpolated digital encoder signal, and digitizes and interpolates the at least one light receiving signal to generate at least one interpolated digital encoder signal. The position detection unit detects a position of an object based on the at least one interpolated digital encoder signal. The speed detection unit detects a speed of the object based on the at least one non-interpolated digital encoder signal. The drive control unit performs a drive control of the object based on the above-detected position and speed. | 08-04-2011 |
20120154474 | LIQUID EJECTION APPARATUS AND STORAGE MEDIUM STORING PROGRAM - A liquid ejection apparatus including: a liquid-ejection head having ejection openings to eject liquid to record an image on a recording medium; a sealing mechanism configured to selectively establish a sealed state and an unsealed state; a humid-air supply mechanism which supplies a humid air into the ejection space; and a controller, wherein, during the sealed state of the ejection space, the controller controls the humid-air supply mechanism to supply the humid air into the ejection space such that one of a density and a viscosity of the liquid to be ejected from the ejection openings becomes less than a predetermined appropriate value, and then controls the liquid-ejection head such that the liquid having an amount equal to or larger than a set amount is preliminarily ejected prior to the ejection of the liquid onto the recording medium for recording the image on the recording medium, is disclosed. | 06-21-2012 |
20140063112 | CONTROL DEVICE AND IMAGE FORMING SYSTEM - There is provided a control device configured to control a drive system including a motor and a driven object. The control device includes a controller configured to compute an operation amount, to measure a control amount of the controlled object, to input a measurement signal of the control amount to an inverse model of a model indicating input-output characteristics of the controlled object, and to generate a differential signal between an output of the inverse model and the operation amount; and a filter configured to filter the generated differential signal, and which has frequency characteristics of attenuating a vibrational component which is developed due to mechanical characteristics of the controlled object, from the differential signal. The controller is configured to make a judgment of whether or not a defect has occurred in the controlled object, based on an output of the filter. | 03-06-2014 |
20140086649 | Fixing Device - A fixing device configured to thermally fix a developing agent image to a recording sheet includes a fixing belt having a tubular shape defining an inner space, a heat generating member, a nip member, and a stay which are disposed in the inner space of the fixing belt, and a rotating member disposed outside the inner space of the fixing belt. The fixing belt is nipped between the nip plate and the rotating member. The stay comprises a first receiving portion and a second receiving portion which are positioned upstream and downstream of the heat generating member, respectively, in a conveying direction of the recording sheet and are configured to receive a force exerted from the rotating member to the nip member. The heat insulator is disposed between the nip member and one of the first receiving portion and the second receiving portion of the stay. | 03-27-2014 |
20140294462 | Fixing Device Provided with Reinforced Nip Member - A fixing device may include a metal plate, an endless belt, a rotating body, and a stay. The metal plate may have a main part comprising a first end portion, a second end portion, and a center portion positioned therebetween and having rigidity higher than that of the first end portion and the second end portion. The endless belt may have an inner peripheral surface configured to be in sliding contact with the metal plate. The main part may be aligned with the rotating body in a direction from the metal plate to the rotating body. The stay may be disposed opposite to the nip region with respect to the metal plate. The stay and the main part of the metal plate may be deformable upon application of the load to the stay such that the main part may provide a convex shape protruding toward the rotating body. | 10-02-2014 |
20140294463 | Fixing Device Provided with Rotating Member Having Concave Shape - The present invention provides a fixing device that may include a nip member, a rotating body and an endless belt. The endless belt may be in sliding contact with the nip member. The rotating body may constitute a nip region. The nip region may define a first, second and third imaginary planes. The first imaginary plane may be perpendicular to the sliding direction. The second imaginary plane may be perpendicular to the axial direction of the rotating body and may contain a first end portion of the nip region. The third imaginary plane may contain a second end portion of the nip region. The first surface may be a convex shape in a first cross-section along the first imaginary plane, and may be concave shape concaved in a direction opposite to the rotating body in second and third cross-sections along the second and third imaginary planes. | 10-02-2014 |
20140294464 | Fixing Device Provided with Stay Having Rigidity Distribution - A fixing device may include a nip member, an endless belt, a rotating body, and a stay. The endless belt may be in sliding contact with the nip member. The rotating body may nip the endless belt to constitute a nip region. The stay may be disposed opposite to the nip region, and may receive a pressure from the nip member. A pressure direction may be defined as a first direction. The rotating body may define an axial direction as a second direction. The stay may have a first wall. The first wall may include a center portion, a first end portion, a second end portion and a supporting portion. The first end portion may include a first low rigidity portion. The second end portion may include a second low rigidity portion. The supporting portion may provide a convex shape protruding toward the nip member upon receiving the pressure. | 10-02-2014 |
20140294465 | Fixing Device Fixing Transferred Developing Agent Image to Sheet - The present invention provides a fixing device that may include a nip member, an endless belt, a rotating member and a stay. The stay may have a first supporting face. The first supporting face may have a first downstream edge. The first downstream edge may have a first portion, a third portion, and a second portion. The second portion may be positioned between the first portion and the third portion. The second supporting face may have a second downstream edge. The second downstream edge may have a fourth portion, a sixth portion, and a fifth portion. The second portion and the fifth portion may define a first distance. The first portion and the fourth portion may define a second distance. The third portion and the sixth portion may define a third distance. The second distance and the third distance may be longer than the first distance. | 10-02-2014 |