公开(公告)号：US20220412878A1

公开(公告)日：2022-12-29

申请号：US17355692

申请日：2021-06-23

申请人： Xerox Corporation

发明人： Donald THRESH ,  Jonathan IRELAND ,  Bruce H. SMITH ,  Michael N. SOURES ,  James D. VANBORTEL

IPC分类号： G01N21/21 ,  B41N3/08 ,  B41F7/24

摘要： An optical light reflectance measurement system above an imaging member surface measures fountain solution surface light reflectance interference on reflective substrate portions of the imaging member surface in real-time during a printing operation. The measured light reflectance interference corresponds to a thickness of the fountain solution layer and may be used in a feedback loop to actively control fountain solution layer thickness by adjusting the volumetric feed rate of fountain solution added onto the imaging member surface during a printing operation to reach a desired uniform thickness for the printing. This fountain solution monitoring system may be fully automated.

公开(公告)号：US20220203749A1

公开(公告)日：2022-06-30

申请号：US17137516

申请日：2020-12-30

申请人： Xerox Corporation

发明人： Douglas K. HERRMANN ,  Chu-heng LIU ,  Seemit PRAHARAJ ,  Paul J. MCCONVILLE ,  Jason M. LEFEVRE ,  Michael J. LEVY

IPC分类号： B41N3/08 ,  B41F33/00 ,  B41F7/24

摘要： According to aspects of the embodiments, there is provided a method of measuring the amount of fountain solution employed in a digital offset lithography printing system. Fountain solution thickness is measured using a glass roll at a lower temperature than the fountain solution. The lower temperature causes the fountain solution to undergo a change in state and in a solid state the fountain solution crystalizes and changes roll opacity with the thickness of the film. When radiated with a light source the opacity is continuously measured through the surface of the roller. The thickness of the crystallized fountain solution can then be determined via the opacity level increase by the crystallization and the impact to the opacity on the glass roll.

公开(公告)号：US20180072899A1

公开(公告)日：2018-03-15

申请号：US15262809

申请日：2016-09-12

申请人： XEROX CORPORATION

发明人： C. Geoffrey ALLEN ,  Marcel P. BRETON ,  Naveen CHOPRA ,  Aurelian Valeriu MAGDALINIS ,  Jonathan Siu-Chung LEE ,  Biby E. ABRAHAM ,  James D. MAYO

IPC分类号： C09D11/101 ,  C09D11/104 ,  B41F7/24

CPC分类号： C09D11/101 ,  B41F7/24 ,  C09D11/00 ,  C09D11/10 ,  C09D11/104 ,  C09D11/34

摘要： An ink composition useful for digital offset printing applications includes a colorant and a high viscosity thickening agent. The ink is formulated to incorporate a gellant into the ink set to help meet the requirement of two different viscosity or temperature pairs at two different stages of the ink delivery process. In lithography imaging a bulk ink is first transferred onto an anilox roll and then onto the imaging cylinder blanket. The first transfer from bulk ink to anilox roll requires the ink to have a low viscosity while the transfer from roll to imaging blanket requires a high viscosity. The addition of the gellant will increase the viscosity difference within the allowable temperature range thus increasing process latitude and robustness.

公开(公告)号：US09643398B1

公开(公告)日：2017-05-09

申请号：US14967134

申请日：2015-12-11

申请人： XEROX CORPORATION

发明人： Peter J. Knausdorf ,  Jack T. Lestrange

IPC分类号： B41F7/24

CPC分类号： G03G15/1625 ,  G03G2215/00523

摘要： An improved apparatus and method for printing directly onto Infra-Red (IR) transparent material (print media) such as Mylar using a method that is capable of using medium to high viscosity materials such as those needed for printed electronics. The proposed method would be able to print with variable data/imaging. A proposed method uses an IR receptor of which a print media is placed or passed over. Prior to irradiation the print media is coated with a sub-micron layer of dampening solution such as silicone oil that is then selectively evaporated off via a laser imaging device which passes IR energy thorough the dampening solution, print media and onto the receptor to evaporate dampening solution in areas that will be inked.

公开(公告)号：US09643397B2

公开(公告)日：2017-05-09

申请号：US14580108

申请日：2014-12-22

申请人： Palo Alto Research Center Incorporated

发明人： Timothy D. Stowe ,  Eric Peeters

IPC分类号： B41F7/24 ,  B41F7/02 ,  B41F7/00 ,  B41F7/26 ,  B41F31/30 ,  B41F35/02

CPC分类号： B41F7/24 ,  B41F7/00 ,  B41F7/025 ,  B41F7/26 ,  B41F31/302 ,  B41F35/02 ,  B41M1/06 ,  B41P2227/70

摘要： A reimageable layer of an imaging member is provided with a dampening fluid layer. The reimageable layer has specific properties such as composition, surface profile, and so on so as to be well suited for receipt and carrying the dampening fluid layer. An optical patterning subsystem such as a scanned modulated laser patterns the dampening fluid layer. Ink having a first set of properties such as color, composition, etc., is applied at an inking subsystem such that it selectively resides in voids formed by the patterning subsystem in the dampening fluid layer to thereby form an inked latent image. The inked latent image is then transferred to a substrate, and the reimageable surface cleaned. The process is repeated for a second ink having properties different than the first. Each ink image may successively be applied to the substrate, or a composite image may be formed then applied to the substrate.

公开(公告)号：US09551934B2

公开(公告)日：2017-01-24

申请号：US15048930

申请日：2016-02-19

申请人： PALO ALTO RESEARCH CENTER INCORPORATED ,  XEROX CORPORATION

发明人： Janos Veres ,  David K. Biegelsen ,  Chu-heng Liu

IPC分类号： G03F7/20 ,  B41F7/24 ,  G03G17/02

CPC分类号： G03F7/20 ,  B41F7/24 ,  G03G17/02

摘要： A system comprises an electrophotographic subsystem, a transfer subsystem, an imaging member, and an inking subsystem. The electrophotographic subsystem comprises a photoreceptor, a charging subsystem, an exposure subsystem, and a development subsystem. In operation, the photoreceptor is charged areawise. An exposure pattern is formed by the exposure subsystem on the surface of the charged photoreceptor to thereby write a latent charge image onto the photoreceptor surface. The image is developed with an image definition material, such as a dampening fluid. The image definition material forms a positive pattern of the image to be printed. The image pattern is then transferred to the reimageable surface. The transferred pattern is then developed by selectively applying an ink over regions of image definition material. The inked image may be transferred to a substrate.

摘要翻译： 系统包括电子照相子系统，传输子系统，成像构件和着墨子系统。 电子照相子系统包括感光体，充电子系统，曝光子系统和开发子系统。 在操作中，感光体面积充电。 通过曝光子系统在带电感光体的表面上形成曝光图案，从而将潜像写入感光体表面。 图像用诸如润版液的图像定义材料显影。 图像定义材料形成要打印的图像的正图案。 然后将图像图案转移到可再成像的表面。 然后通过在图像定义材料的区域上选择性地施加墨水来显影转印图案。 着墨的图像可以被转印到基底上。

公开(公告)号：US20160059541A1

公开(公告)日：2016-03-03

申请号：US14838277

申请日：2015-08-27

申请人： KOMORI CORPORATION

发明人： Hiroyoshi Kamoda ,  Taichi Kawase

IPC分类号： B41F7/24 ,  B41F7/04

CPC分类号： B41F7/24 ,  B41F5/02 ,  B41F7/02 ,  B41F7/025 ,  B41F7/04 ,  B41F7/06 ,  B41F7/26 ,  B41F7/40 ,  B41F11/02

摘要： A printing press includes an impression cylinder, a blanket cylinder, a collecting plate cylinder, a collecting blanket cylinder, a plurality of partial plate cylinders, a plurality of inking devices, and a dampening unit. The impression cylinder holds and transports a sheet. The blanket cylinder is in contact with the impression cylinder. The collecting plate cylinder is in contact with the blanket cylinder, and a lithographic printing plate is mounted on the collecting plate cylinder. The collecting blanket cylinder is in contact with the collecting plate cylinder. The plurality of partial plate cylinders are in contact with the collecting blanket cylinder. The plurality of inking devices supply ink to the plurality of partial plate cylinders, respectively. The dampening unit supplies dampening water to the collecting plate cylinder.

摘要翻译： 印刷机包括压印滚筒，橡皮布滚筒，收集印版滚筒，收集橡皮布滚筒，多个部分印版滚筒，多个上墨装置和阻尼单元。 压印滚筒保持和传送纸张。 橡皮布滚筒与压印滚筒接触。 收集印版滚筒与橡皮滚筒接触，平版印刷版安装在收集印版滚筒上。 收集橡皮布滚筒与收集印版滚筒接触。 多个部分印版滚筒与收集橡皮布滚筒接触。 多个上墨装置分别向多个部分印版滚筒供应墨水。 润湿单元为收集板气缸供给润湿水。

公开(公告)号：US08950322B2

公开(公告)日：2015-02-10

申请号：US13426209

申请日：2012-03-21

申请人： Chu-heng Liu ,  Peter Knausdorf

发明人： Chu-heng Liu ,  Peter Knausdorf

IPC分类号： B41F7/24 ,  B41N3/08

CPC分类号： B41C1/1033 ,  B41F7/00 ,  B41F7/30 ,  B41F33/0054 ,  B41N3/08

摘要： A system and corresponding methods are disclosed for controlling the thickness of a layer of dampening fluid applied to a reimageable surface of an imaging member in a variable data lithography system. Following deposition of the dampening fluid layer, a gas is passed over a region of the fluid layer prior to pattern forming. The gas causes a controlled amount of the dampening fluid layer to evaporate such that the remaining layer is of a desired and controlled thickness. Among other advantages, improved print quality is obtained.

摘要翻译： 公开了一种用于控制在可变数据光刻系统中施加到成像构件的可再成像表面的阻尼流体层的厚度的系统和相应方法。 在沉积润湿流体层之后，在图案形成之前气体通过流体层的区域。 气体导致受控量的阻尼流体层蒸发，使得剩余的层具有期望和受控的厚度。 除了其他优点之外，还获得了改进的打印质量。

公开(公告)号：US08037816B2

公开(公告)日：2011-10-18

申请号：US12147549

申请日：2008-06-27

申请人： Martin Gutfleisch ,  Axel Hauck

发明人： Martin Gutfleisch ,  Axel Hauck

IPC分类号： B41F7/24 ,  B41F25/00

CPC分类号： B41F33/0054 ,  Y10S101/45 ,  Y10S101/46

摘要： 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.

摘要翻译： 测量领域允许在印刷期间确定涂抹极限，特别是在平版印刷湿胶版印刷期间。 测量区域布置在其表面上具有印刷，墨水携带区域和非印刷，润湿溶液携带区域的印刷形式，特别是印刷版上。 与测量领域中的润湿溶液携带性​​相比，通过纳米镜涂层（例如，具有两亲分子）或未屏蔽的微观涂层（例如，聚合物涂层）来减少测量区域中的润湿溶液携带性​​能 印刷表面的非印刷区域。 纳米尺度涂层或微观涂层有利地导致涂抹极限的移动，即浮渣起始位置的移动，通过在测量区域内无浮渣印刷而增加的阻尼溶液要求 领域。 因此，这样的测量领域有利地用于阻尼溶液供应的闭环控制。

公开(公告)号：US06971310B1

公开(公告)日：2005-12-06

申请号：US10089456

申请日：2000-09-29

申请人： Henrik Christiansen

发明人： Henrik Christiansen

IPC分类号： B41F7/26 ,  B41F7/24 ,  B41F23/08 ,  B41F33/10 ,  B41F31/00

CPC分类号： B41F23/08 ,  B41F7/24

摘要： There is described a printing unit (1) for use in an offset machine. The printing unit enables wider application of offset machines (1). This is achieved by the coating means and the water application means comprising a unit (28) consisting of a doctor blade (30) and at least one roller (29, 32) for transferring coating or water from the doctor blade (30) to the plate cylinder (15)/blanket cylinder (14) of the printing unit. The unit (28) is arranged for pivoting so that water is transferred to plate cylinder, and coating is transferred directly to the blanket cylinder.

摘要翻译： 描述了一种用于胶印机的印刷单元（1）。 印刷单元可以更广泛地应用胶印机（1）。 这通过涂覆装置和施加水的装置来实现，所述施水装置包括由刮刀（30）和至少一个辊（29,32）组成的单元（28），用于将涂层或水从刮刀（30）转移到 印版滚筒（15）/橡皮布滚筒（14）。 单元（28）布置成用于枢转，使得水转移到印版滚筒，并且涂层直接传送到橡皮布滚筒。