Patent application number | Description | Published |
20080295719 | Method for drying a printing ink on a printing substrate in a printing press, and a printing press - A method for drying a printing ink ( | 12-04-2008 |
20090002430 | Measurement Field for Determining the Smearing Limit During Printing - A measurement field allows determining the smearing limit during printing, in particular during lithographic wet offset printing. The measurement field is arranged on a printing form, in particular a printing plate, which has printing, ink-carrying regions and nonprinting, dampening solution-carrying regions on its surface. A dampening solution-carrying property in the region of the measurement field is reduced by a nanoscopic coating (e.g., with amphiphilic molecules) or an unscreened, microscopic coating (e.g., a polymer coating) in comparison with the dampening solution-carrying property in the nonprinting regions of the surface of the printing form. The nanoscopic coating or the microscopic coating advantageously leads to a shifting of the smearing limit, that is to say to a displacement of the starting point of scumming, by the dampening solution requirement which is increased for scum-free printing within the region of the measurement field. Such a measurement field is thus advantageously used for the closed-loop control of a dampening solution supply. | 01-01-2009 |
20090025584 | Method for Developing Printing Plates in an Offset Printing Press and Printing Press for Carrying out the Method - A method for developing printing plates in a printing press having at least one printing unit includes loading an imaged, undeveloped printing plate with dampening solution before a start of printing for dampening in at least one printing unit of the printing press for an active duration corresponding at least to one and one half times a time duration or number of machine revolutions provided before a start of printing when an already developed printing plate is used in the same printing press. A printing press for carrying out the method is also provided. | 01-29-2009 |
20100000430 | OFFSET PRINTING PROCESS - An offset printing process is carried out in an offset printing unit. Offset printing ink pre-emulsified with a dampening solution is supplied to the offset printing unit through an ink metering device and further dampening solution is supplied in the offset printing unit. The offset printing ink is applied to a printing form with at least one ink applicator roller and a printing material is printed with the offset printing ink. In this way, a subject-independent, constant margin from the smearing limit for offset printing is obtained. | 01-07-2010 |
20110011289 | ROTARY LITHOGRAPHIC PRINTING MACHINE - A rotary lithographic printing machine includes an inking unit with a plurality of inking rollers and a dampening unit with a plurality of dampening rollers. One of the dampening rollers has a porous surface from which dampening solution emerges. At least two further rollers are disposed in a dampening solution flow between the dampening roller having the porous surface and a plate cylinder. | 01-20-2011 |
20110079160 | METHOD AND DEVICE FOR DETERMINING REGISTER DEVIATIONS THROUGH RECURSION ANALYSIS - A method and a device for determining color register and lateral register deviations on printing material during production in multi-color printing presses, include a computing unit which takes into consideration the influence of ghosting effects when measuring the deviations on the printing material. The ghosting effects of at least one preceding and/or one succeeding printed image are recursively taken into consideration in the computing unit, when measuring on the printing material. | 04-07-2011 |
20130199391 | METHOD FOR PRODUCING A CONTROL AREA FOR OFFSET PRINTING, CONTROL AREA AND PRINTING FORM HAVING A CONTROL AREA - A method for producing a control area to prevent scumming of a printing form that can be used for offset printing with dampening solutions, includes producing the control area separately from the printing form and joining the control area to the printing form thereafter. A cut-out is introduced into the printing form and the control area is inserted into the cut-out. A control area and a printing form having a control area are also provided. | 08-08-2013 |
20130312629 | OFFSET PRINTING METHOD - An offset printing method includes creating halftone dots corresponding to a printed image and formed of printing ink, on a surface of a transfer cylinder and transferring the halftone dots to a printing substrate while the transfer cylinder rotates about its longitudinal axis. A halftone value in a printed image on the printing substrate is adjusted to a desired value by modifying a halftone dot size. The offset printing method improves the quality of the printed image by increasing the halftone dot size by a desired amount by providing a relative offset between a device that creates the halftone dots and the surface of the transfer cylinder. | 11-28-2013 |