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    Dual encoder system to minimize reflex printing variation
    1.
    发明授权
    Dual encoder system to minimize reflex printing variation 有权

    公开(公告)号：US10752028B2

    公开(公告)日：2020-08-25

    申请号：US16204326

    申请日：2018-11-29

    Applicant: Xerox Corporation

    Inventor： Patricia J. Donaldson ,  James P. Calamita ,  David M. Kerxhalli

    IPC: B41J11/42 ,  B41J2/155 ,  B41J15/16 ,  B41J25/00 ,  B41J15/04 ,  B41J2/21

    Abstract: A printing system includes a pair of encoders to compensate for encoder noise in the velocity of a media transport as the transport moves past a plurality of printheads. One encoder monitors a roller that positioned at a location of low thermal stress and the signal generated by this encoder is used by a controller to maintain a constant velocity for the media transport. The second encoder monitors a roller used to drive the media transport and is positioned close to the print zone opposite the printheads. The signal from the second encoder is used to identify a corrected distance between each tic in the tics generated by the second encoder and the corrected distance is used to count a firing distance for generation of a dot clock signal to activate ejectors in a printhead when a substrate has traveled the firing distance.

    System and method for reducing or eliminating hue shift in three-dimensional printed objects
    6.
    发明授权
    System and method for reducing or eliminating hue shift in three-dimensional printed objects 有权
    用于减少或消除三维打印物体色调偏移的系统和方法

    公开(公告)号：US09550328B2

    公开(公告)日：2017-01-24

    申请号：US14578963

    申请日：2014-12-22

    Applicant: Xerox Corporation

    Inventor： Patricia J. Donaldson

    IPC: B28B17/00 ,  B28B1/16 ,  B29C35/08 ,  B29C67/00 ,  B29L9/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y80/00

    CPC classification number: B29C67/0088 ,  B29C64/112 ,  B29C64/386 ,  B29C67/0059 ,  B29L2009/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y80/00

    Abstract: A method of forming an image on a three-dimensional printed object includes operating first plurality of ejectors to form a first layer of a blocking material having an opacity level that prevents transmission of incident visible light to another layer in the three-dimensional printed object, operating a second plurality of ejectors to form a second layer of a primer material over the first layer, and operating a third plurality of ejectors to form a printed image from at least one marking agent over the primer material. The layers of blocking material and primer material reduce or eliminate hue shift in the image.

    Abstract translation: 在三维印刷对象上形成图像的方法包括操作第一多个喷射器以形成阻挡材料的第一层，其具有防止将入射的可见光传输到三维打印物体中的另一层的不透明度水平， 操作第二多个喷射器以在所述第一层上形成底漆材料的第二层，以及操作第三多个喷射器以从所述底漆材料上的至少一个标记剂形成印刷图像。 阻挡材料和底漆材料的层减少或消除了图像中的色相偏移。

    SYSTEM AND METHOD FOR TEST PATTERN FORMATION DURING THREE-DIMENSIONAL OBJECT PRINTING
    7.
    发明申请
    SYSTEM AND METHOD FOR TEST PATTERN FORMATION DURING THREE-DIMENSIONAL OBJECT PRINTING 审中-公开
    三维物体印刷期间测试图形的系统和方法

    公开(公告)号：US20160101568A1

    公开(公告)日：2016-04-14

    申请号：US14509827

    申请日：2014-10-08

    Applicant: Xerox Corporation

    Inventor： Howard A. Mizes ,  Brian R. Conrow ,  Patricia J. Donaldson ,  Jeffrey J. Fokins ,  Paul A. Hosier ,  Robert J. Kleckner

    IPC: B29C67/00

    CPC classification number: B29C64/386 ,  B29C64/106 ,  B29C64/112 ,  B29C64/393 ,  B29K2101/12 ,  B29L2031/772 ,  B33Y10/00 ,  B33Y50/02

    Abstract: A three-dimensional object printer ejects drops of a build material from a plurality of ejectors in a first printhead to form an object on a first region of a member and ejects drops of a support material from a plurality of ejectors in a second printhead to support the object on the first region of the member. The second printhead ejects drops of the support material onto a second region of the member that is separate from the first region to form a substrate layer. The first printhead ejects drops of the build material onto the substrate layer to form a printed test pattern. An image sensor generates image data of the printed test pattern to identify an inoperable ejector in the first printhead.

    Abstract translation: 三维物体打印机从第一打印头中的多个喷射器喷射建筑材料的液滴，以在构件的第一区域上形成物体，并且从第二打印头中的多个喷射器喷射支撑材料的液滴以支撑 该成员的第一个区域上的对象。 第二打印头将支撑材料的液滴喷射到与第一区域分离的构件的第二区域上以形成基底层。 第一打印头将构建材料的液滴喷射到基底层上以形成印刷的测试图案。 图像传感器产生打印的测试图案的图像数据，以识别第一打印头中的不可操作的喷射器。

    In situ calibration of multiple printheads to reference ink targets
    8.
    发明授权
    In situ calibration of multiple printheads to reference ink targets 有权
    多个打印头的原位校准以参考墨水目标

    公开(公告)号：US08801140B2

    公开(公告)日：2014-08-12

    申请号：US13786540

    申请日：2013-03-06

    Applicant: Xerox Corporation

    Inventor： R. Enrique Viturro ,  Yeqing Zhang ,  Patricia J. Donaldson

    IPC: B41J29/393 ,  B41J2/045

    CPC classification number: B41J29/393 ,  B41J2/04508 ,  B41J2/04581 ,  B41J2/04588 ,  B41J2/0459 ,  B41J2029/3935 ,  B41J2202/21

    Abstract: A method for calibrating in situ a plurality of printheads in an imaging device has been developed. Firing signals operate a plurality of printheads to form ink test patterns on an image receiving member. Reflectance measurements of light reflected from the test patterns and optical density measurements for a portion of the patterns formed by only one printhead in the plurality of printheads are used to adjust the firing signals and enable the printheads to print within a predetermined range about an average reflectance value and a predetermined optical density.

    Abstract translation: 已经开发了用于在成像装置中原位校准多个打印头的方法。 发射信号操作多个打印头以在图像接收部件上形成墨测试图案。 用于从由多个打印头中的一个打印头形成的图案的一部分图案从测试图案反射的光的反射率测量值和光密度测量结果用于调整点火信号，并使得打印头能够在围绕平均反射率的预定范围内打印 值和预定的光密度。

    DUAL ENCODER SYSTEM TO MINIMIZE REFLEX PRINTING VARIATION
    9.
    发明申请
    DUAL ENCODER SYSTEM TO MINIMIZE REFLEX PRINTING VARIATION 审中-公开

    公开(公告)号：US20200171855A1

    公开(公告)日：2020-06-04

    申请号：US16204326

    申请日：2018-11-29

    Applicant: Xerox Corporation

    Inventor： Patricia J. Donaldson ,  James P. Calamita ,  David M. Kerxhalli

    IPC: B41J11/42 ,  B41J2/155 ,  B41J2/21 ,  B41J25/00 ,  B41J15/04 ,  B41J15/16

    Abstract: A printing system includes a pair of encoders to compensate for encoder noise in the velocity of a media transport as the transport moves past a plurality of printheads. One encoder monitors a roller that positioned at a location of low thermal stress and the signal generated by this encoder is used by a controller to maintain a constant velocity for the media transport. The second encoder monitors a roller used to drive the media transport and is positioned close to the print zone opposite the printheads. The signal from the second encoder is used to identify a corrected distance between each tic in the tics generated by the second encoder and the corrected distance is used to count a firing distance for generation of a dot clock signal to activate ejectors in a printhead when a substrate has traveled the firing distance.

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