中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

51 records (took 0.018 seconds)

    System and method for closed loop regulation of ink drop volumes in a printhead
    23.
    发明授权
    System and method for closed loop regulation of ink drop volumes in a printhead 有权

    公开(公告)号：US10814620B1

    公开(公告)日：2020-10-27

    申请号：US16598356

    申请日：2019-10-10

    Applicant: Xerox Corporation

    Inventor： Seemit Praharaj ,  Stuart A. Schweid ,  Michael J. Levy ,  John T. Newell

    IPC: B41J2/045 ,  B41J29/393

    Abstract: A printer includes a plurality of printheads, a plurality of printhead drivers, and an optical sensor configured to generate image data of a substrate after the substrate has been printed by the plurality of printheads. A controller operates the printheads using the printhead drivers to print a pattern of ink drops on the substrate, determine from image data of the ink drop pattern received from the optical sensor whether a density response for the pattern of ink drops for each printhead is within a predetermined range about a reference density response for the pattern of ink drops, identify a peak voltage for each printhead determined to have the density response outside the predetermined range, and store the identified peak voltage in the printhead driver for the printhead. The printhead driver uses the identified peak voltage to generate firing signals for the printhead operatively connected to the printhead driver.

    System and method for attenuating the drying of ink from a printhead
    24.
    发明授权
    System and method for attenuating the drying of ink from a printhead 有权

    公开(公告)号：US10518537B1

    公开(公告)日：2019-12-31

    申请号：US16204411

    申请日：2018-11-29

    Applicant: Xerox Corporation

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

    IPC: B41J2/165

    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 with an opening corresponding to a perimeter of a printhead, a pair of members pivotably mounted to the printhead receptacle so the members can move between a first position where the members expose the opening of the printhead receptacle and a second position where the members cover the opening of the printhead receptacle, and an actuator operatively connected to the pair of members to move the members between the first position and the second position. A controller is operatively connected to the actuator to operate the first actuator to move the members between the first position and the second position.

    RECOVERY OF MISSING JETS
    26.
    发明申请
    RECOVERY OF MISSING JETS 审中-公开

    公开(公告)号：US20190016139A1

    公开(公告)日：2019-01-17

    申请号：US15647318

    申请日：2017-07-12

    Applicant: Xerox Corporation

    Inventor： Seemit Praharaj ,  Michael J. Levy

    IPC: B41J2/165 ,  B41J2/21 ,  B41J2/17

    Abstract: A jet recovery print process is performed each time before printing a print job, when an inactivity period of non-printing has been exceeded, or during a long print job, where the jets might clog with debris. The jet recovery print process ejects the ink from the inkjets by printing (using the inkjets) a sacrificial page in a jet recovery pattern, while operating the actuators in the inkjets at their maximum voltage rating. The jet recovery pattern is designed to purge all the ink from all the inkjets. Thus, in the jet recovery print process, the controller operates the actuators at their maximum voltage rating so as to provide a higher driving force for the ink to be ejected from the inkjets and thereby make the purge process more effective.

    In-situ nip measurement for printing
    28.
    发明授权
    In-situ nip measurement for printing 有权
    打印原位压区测量

    公开(公告)号：US09233563B1

    公开(公告)日：2016-01-12

    申请号：US14606260

    申请日：2015-01-27

    Applicant: XEROX CORPORATION

    Inventor： Jason M. LeFevre ,  Michael J. Levy

    IPC: B41J2/01 ,  B41J13/00

    CPC classification number: B41J13/0027 ,  B41J13/025

    Abstract: A method for evaluating a nip condition in a printer is provided. The method includes printing a print area with a uniform density of marking material on a substrate; moving the substrate along a process direction into a spreading position in a nip while the nip is in an open position; stopping movement of the substrate along the process direction while the substrate is in the nip in the open position; closing the nip where the nip exerts pressure on a spread portion of the print area and the substrate such that the spread portion is visibly different from a remainder of the print area outside of the spread portion; opening the nip; moving the substrate away from the spreading position and out of the nip; and analyzing the spread portion relative to the remainder of the print area to determine characteristics of the nip condition.

    Abstract translation: 提供了一种用于评估打印机中的压区条件的方法。 该方法包括在衬底上印刷具有均匀密度的标记材料的印刷区域; 在夹持部处于打开位置时，将基板沿着加工方向移动到辊隙中的扩展位置; 当衬底处于打开位置的辊隙中时，停止衬底沿着加工方向的移动; 关闭压区，其中压区对打印区域和基板的展开部分施加压力，使得展开部分与展开部分外部的打印区域的其余部分明显不同; 打开辊隙 使基板远离扩展位置并移出辊隙; 并且相对于打印区域的其余部分分析展开部分以确定压区条件的特征。

    System and method for highlighting printed material on a document
    29.
    发明授权
    System and method for highlighting printed material on a document 有权
    在文档上突出显示打印材料的系统和方法

    公开(公告)号：US08950855B1

    公开(公告)日：2015-02-10

    申请号：US14087510

    申请日：2013-11-22

    Applicant: Xerox Corporation

    Inventor： Jason M. LeFevre ,  Michael J. Levy

    IPC: B41J2/01 ,  B41J11/00

    CPC classification number: B41J11/0015 ,  B41J2/01 ,  B41M7/0027

    Abstract: An inkjet printer and a method of operating an inkjet printer provide a luminescent background for facilitating viewing of indicia printed on porous media in no-light or low-light conditions. The printer and method apply a first enhancement material to a surface of porous media to which ink has been applied to form indicia and a second enhancement material to a back side of porous media. The two enhancement materials combine through the porous media to provide a luminescent background for the indicia printed on the media. The two surfaces of the porous media can be covered with laminating material to protect the enhancement materials.

    Abstract translation: 喷墨打印机和操作喷墨打印机的方法提供发光背景，以便于在无光或低光条件下观察印刷在多孔介质上的标记。 打印机和方法将第一增强材料施加到多孔介质的已经被施加墨的表面上以形成标记，并将第二增强材料施加到多孔介质的背面。 两种增强材料通过多孔介质结合，为印刷在介质上的标记提供发光背景。 多孔介质的两个表面可以覆盖层压材料以保护增强材料。

    Active airflow control device for vacuum paper transport
    30.
    发明授权
    Active airflow control device for vacuum paper transport 有权

    公开(公告)号：US11639067B2

    公开(公告)日：2023-05-02

    申请号：US16679220

    申请日：2019-11-10

    Applicant: Xerox Corporation

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

    IPC: B41J11/00 ,  B41J2/155 ,  B65H5/22 ,  B41J13/08

    Abstract: A marker transport system and a method of operating the marker transport system. A group of print bars is located with respect to a marker transport platen and a marker transport belt. A vacuum source and a pneumatic solenoid block are associated with the marker transport platen. The marker transport platen includes airflow sections divided into process-direction slots and cross-section direction slots. The cross-section direction slots are located beneath the print bars and are connected to the vacuum source via the pneumatic solenoid block, which facilitates an individual control of each of the cross-process direction slots. Pneumatic valves are associated with the pneumatic solenoid block, which supplies a flow of vacuum to the cross-process direction vacuum slots. The pneumatic vales can be timed to allow the vacuum to be present when a sheet is present over a corresponding vacuum slot among the process-direction slots and the cross-section direction slots.

Patent Agency Ranking