公开(公告)号：US08958723B2

公开(公告)日：2015-02-17

申请号：US13631989

申请日：2012-09-29

Applicant: Xerox Corporation

Inventor： Chu-heng Liu

IPC: G03G15/10

CPC classification number: G03G15/10 ,  G03G15/101 ,  G03G15/104

Abstract: Ink-based digital printing systems useful for ink printing include a photoreceptor layer configured to receive a layer of liquid immersion fluid. The liquid immersion fluid includes dampening fluid, dispersed solid particles, and charge directors that impart charge to the solid particles. The photoreceptor surface is charged to a uniform potential, and selectively discharged using an ROS according to image data to form an electrostatic latent image. The charged liquid immersion fluid adheres to portions of the photoreceptor surface according to the electrostatic latent image to form a liquid immersion fluid image. The fluid portion of the liquid immersion fluid image is partially transferred to an imaging member and/or transfer member to form a dampening fluid image, either or both of which may be electrically biased. The dampening fluid image is inked on the transfer member, and the resulting ink image transferred to a recording medium.

Abstract translation: 可用于油墨印刷的基于油墨的数字印刷系统包括被配置为接收液浸液体层的感光体层。 液体浸液包括润湿流体，分散的固体颗粒和赋予固体颗粒电荷的电荷引导剂。 将感光体表面充电至均匀电位，并根据图像数据使用ROS选择性地放电以形成静电潜像。 带电的液浸流体根据静电潜像粘附到感光体表面的部分以形成液浸流体图像。 液浸流体图像的流体部分被部分地转移到成像构件和/或转印构件以形成阻尼流体图像，或者两者都可以是电偏置的。 润湿液体图像在转印部件上着色，并将所得油墨图像转印到记录介质上。

公开(公告)号：US08777396B2

公开(公告)日：2014-07-15

申请号：US13720368

申请日：2012-12-19

Applicant: Xerox Corporation

Inventor： Howard A. Mizes ,  Jeffrey J. Folkins ,  Paul J. McConville ,  David A. Mantell ,  Anthony S. Condello ,  Chu-heng Liu

IPC: B41J2/01

CPC classification number: B41J2/01 ,  B41J2/04505 ,  B41J2/04508 ,  B41J2/0451 ,  B41J2/04586 ,  B41J2002/012

Abstract: An aqueous inkjet printer is configured to evaluate and adjust multiple components within the printer with reference to image data of the surface of a rotating member obtained at different times during a single print cycle. The print cycle can be performed in a multiple pass manner to enable a single optical sensor to be used for generation of the image data. Alternatively, the print cycle can be performed in a single revolution of the rotating member and multiple optical sensors positioned about the rotating member to generate the image data.

Abstract translation: 水性喷墨打印机被配置为参考在单个打印循环期间在不同时间获得的旋转部件的表面的图像数据来评估和调整打印机内的多个部件。 打印循环可以以多次方式执行，以使单个光学传感器能够用于生成图像数据。 或者，打印循环可以在旋转构件的一圈中旋转并且围绕旋转构件定位的多个光学传感器执行以产生图像数据。

公开(公告)号：US20140168313A1

公开(公告)日：2014-06-19

申请号：US13720409

申请日：2012-12-19

Applicant: XEROX CORPORATION

Inventor： Palghat S. Ramesh ,  Paul J. McConville ,  Chu-heng Liu ,  Anthony S. Condello

IPC: B41J2/14

CPC classification number: B41J2/14153 ,  B41J2/0057 ,  B41J29/377

Abstract: An aqueous inkjet printer includes a print zone with a relative humidity sensor and a temperature sensor. A controller identifies a dew point of air between a printhead and an intermediate imaging member with reference to the air temperature and the moisture in the air of the print zone, and identifies a target dew point with reference to the image data used to operate the printhead. The controller operates a heater and an air mover to adjust the dew point of the air between the printhead and the intermediate imaging member to the target dew point.

Abstract translation: 水性喷墨打印机包括具有相对湿度传感器和温度传感器的打印区域。 控制器参考打印区域的空气温度和空气中的水分来识别打印头和中间成像构件之间的空气露点，并且参考用于操作打印头的图像数据来识别目标露点 。 控制器操作加热器和空气推动器，以将打印头和中间成像构件之间的空气的露点调整到目标露点。

公开(公告)号：US20140168304A1

公开(公告)日：2014-06-19

申请号：US13720333

申请日：2012-12-19

Applicant: XEROX CORPORATION

Inventor： Howard A. Mizes ,  Jeffrey J. Folkins ,  Chu-heng Liu ,  David A. Mantell

IPC: B41J2/125

CPC classification number: B41J11/0015 ,  B41J2/0057

Abstract: An inkjet printer is configured to apply a coating material to an imaging surface before an ink image is formed on the surface. At least one optical sensor generates image data of the coating on the imaging surface and identifies a thickness of the coating material. Components of the coating material applicator can be adjusted to keep the thickness of the coating material within a predetermined range.

Abstract translation: 喷墨打印机被配置为在表面上形成油墨图像之前将涂料施加到成像表面。 至少一个光学传感器产生成像表面上的涂层的图像数据并识别涂层材料的厚度。 可以调节涂料施加器的部件以将涂层材料的厚度保持在预定范围内。

公开(公告)号：US12219110B2

公开(公告)日：2025-02-04

申请号：US17859901

申请日：2022-07-07

Applicant: Xerox Corporation

Inventor： Chu-heng Liu ,  Jorge A. Alvarez ,  Douglas L. Herrmann ,  Jason Matthew LeFevre ,  Seemit Praharaj

IPC: H04N1/32 ,  G06K15/10

Abstract: Methods and systems for securely rendering a security feature with image data to be printed, can involve providing within the image data, data relating to a group of spots, and within the image data, mixing spots of two or more spot sizes among the group of spots to embed information within a stochastic or frequency modulation halftone image. In an embodiment, operations may be implemented for rendering a part of the image with a first spot among the group of spots and a remaining portion of the image with a second spot among the group of spots, wherein the second spot is smaller in size than the first spot.

公开(公告)号：US11685150B2

公开(公告)日：2023-06-27

申请号：US17358634

申请日：2021-06-25

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Chu-heng Liu ,  Paul J. McConville ,  Douglas K. Herrmann ,  Jason M. Lefevre

IPC: B41F31/02 ,  B41F31/13

CPC classification number: B41F31/022 ,  B41F31/13

Abstract: A coefficient of friction (COF) sensor on a carrier roll surface wetted with fountain solution transferred from an imaging member measures COF of the wetted carrier roll surface in real-time, even between or during printing operations. The transferred fountain solution may be concentrated and/or chilled to solidify before the measurement. The measured COF is used in a feedback loop to actively control the fountain solution layer thickness by adjusting the volumetric feed rate of fountain solution added onto the imaging member surface during an imaging or other 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：US20220332116A1

公开(公告)日：2022-10-20

申请号：US17850526

申请日：2022-06-27

Applicant: XEROX CORPORATION

Inventor： Chu-heng Liu

IPC: B41J2/14

Abstract: A method for operating a printer can include draining a print material from a printer, placing a sacrificial metal into the printer, ejecting the sacrificial metal from a nozzle of the printer, and cooling to printer to a temperature that is below a melting point of the print material and the sacrificial metal. The print material can be or include aluminum and the sacrificial metal can be or include tin. The print material can be drained from the printer when the print material is in molten form, for example, from about 600° C. to about 2000° C. The sacrificial metal can be ejected from the nozzle at a temperature above the melting point of the sacrificial metal but below the melting point of the print material, for example, below about 300° C. The method can reduce or eliminate cracking of various printer structures such as the nozzle during a shutdown or cooling of the printer.

公开(公告)号：US20220283683A1

公开(公告)日：2022-09-08

申请号：US17190501

申请日：2021-03-03

Applicant: Xerox Corporation

Inventor： Douglas K. Herrmann ,  Seemit Praharaj ,  Jason M. LeFevre ,  Paul J. McConville ,  Chu-heng Liu ,  Linn C. Hoover ,  David A. VanKouwenberg

IPC: G06F3/0488 ,  B08B1/00

Abstract: Devices include first and second frame elements having mounting points connectable to opposite ends (e.g., first end, second end) of the touchscreen. First and second rollers are connected, respectively, to the first and second frame elements. A web of transparent material is supported by and between the first and second rollers. Further, an ultraviolet light device is connected to the second frame element and is positioned to expose the web of transparent material to ultraviolet radiation to disinfect the transparent material between users.

公开(公告)号：US20220257810A1

公开(公告)日：2022-08-18

申请号：US17177300

申请日：2021-02-17

Applicant: Xerox Corporation

Inventor： Seemit Praharaj ,  Douglas K. Herrmann ,  Chu-heng Liu ,  Paul J. McConville ,  Jason M. LeFevre ,  Linn C. Hoover ,  David A. VanKouwenberg

IPC: A61L2/10 ,  H04N1/00

Abstract: An apparatus includes, among other components, a frame adapted to be connected to the exterior surface of a device that has a touchscreen. A retractable cover is operatively connected to the frame. The size of the retractable cover is equal to at least the size of the touchscreen, and the retractable cover is positioned to extend so as to cover the touchscreen. At least one ultraviolet light is also operatively connected to the frame. The ultraviolet light is positioned to direct ultraviolet lighting toward the touchscreen when the retractable cover extends to cover the touchscreen.

公开(公告)号：US10933641B2

公开(公告)日：2021-03-02

申请号：US16908959

申请日：2020-06-23

Applicant: Xerox Corporation

Inventor： David A. VanKouwenberg ,  Linn C. Hoover ,  Michael J. Levy ,  Jason M. LeFevre ,  Chu-heng Liu ,  Paul J. McConville ,  Douglas K. Herrmann ,  Seemit Praharaj

IPC: B41J2/165 ,  B41J2/175

Abstract: An inkjet printer is configured with capping stations for storing printheads in the printer during periods of printer inactivity so the viscosity of the ink in the nozzles of the inkjets of the printheads does not increase significantly. Each capping station has a printhead receptacle that encloses a volume, a planar member configured to move between a first position at which the planar member is located within the printhead receptacle and a second position at which the planar member is external of the printhead receptacle, a first actuator operatively connected to the planar member, the first actuator being configured to move the planar member from the first position to the second position, and a controller configured to operate the first actuator to move the planar member from the first position to the second position to mate the planar member with a face of a printhead.