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    DUAL ENCODER SYSTEM TO MINIMIZE REFLEX PRINTING VARIATION
    3.
    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.

    System and method for aligning images on media or platens
    4.
    发明授权
    System and method for aligning images on media or platens 有权

    公开(公告)号：US09643405B1

    公开(公告)日：2017-05-09

    申请号：US15224941

    申请日：2016-08-01

    Applicant: Xerox Corporation

    Inventor： James P. Calamita

    IPC: B41J11/42 ,  B41J2/045 ,  B41J2/21

    CPC classification number: B41J2/2146 ,  B41J2/2132 ,  B41J2/2135 ,  B41J11/008 ,  B41J11/0095

    Abstract: A printing system facilitates the registration of printheads in the system. The system includes a plurality of printheads, a planar member having at least three pins along a first edge of the planar member and a plurality of pins on a second edge of the planar member that is orthogonal to the first edge, a plurality of actuators, an optical imaging device, and a controller. The controller operates one of the printheads to form a registration target on the media sheet and processes image data of the planar member and the media sheet received from the optical imaging device to identify positions for the registration target and at least two of the three pins on the planar member. Error distances are identified from the positions for the registration target and the at least two pins on the edge of the planar member and are used to register the printheads.

    Method for measuring beam to beam stitch error in the presence of variable width beams
    5.
    发明授权
    Method for measuring beam to beam stitch error in the presence of variable width beams 有权

    公开(公告)号：US10594887B1

    公开(公告)日：2020-03-17

    申请号：US16356632

    申请日：2019-03-18

    Applicant: Xerox Corporation

    Inventor： James P. Calamita

    IPC: H04N1/06 ,  H04N1/04 ,  H04N1/10 ,  H04N1/113

    Abstract: According to aspects of the embodiments, there is provided process and architecture for enabling multiple digital micromirror devices (DMDs) that include optical modulation elements configured to modulate light outputting from a light source, and a projection unit configured to project light modulated by the optical modulation elements on a printing plate. Image defects due to misalignment in the cross-process direction of the output from the DMDs are discovered by using a single test pattern image and combined with knowledge of how individual pixels are rendered to register printing elements which can render a variable number of pixels. Misalignment errors can be corrected by selecting a different set of mirrors for a given DMD.

    System and method for identification of marks in printed test patterns
    8.
    发明授权
    System and method for identification of marks in printed test patterns 有权
    用于识别打印测试图案中的标记的系统和方法

    公开(公告)号：US09375962B1

    公开(公告)日：2016-06-28

    申请号：US14746894

    申请日：2015-06-23

    Applicant: Xerox Corporation

    Inventor： Patricia J. Donaldson ,  Michael B. Monahan ,  James P. Calamita

    IPC: B41J29/393

    CPC classification number: B41J29/393 ,  B41J2/16579 ,  B41J2/16585 ,  B41J2/2142 ,  B41J2/2146

    Abstract: A method of analyzing a printed test pattern includes printing first and second rows of marks, each row including at least two pluralities of marks. A gap between two pluralities of marks in the first row is located in a first position in a cross-process direction that is different than a second position of another gap between pluralities of marks in the second row. A controller identifies the first row of marks with reference to a predetermined set of image data corresponding to the first row of marks including the first plurality of marks, the second plurality of marks, and the gap in the first row.

    Abstract translation: 分析打印测试图案的方法包括打印第一和第二行标记，每行包括至少两个多个标记。 第一行中的两个多个标记之间的间隙位于与第二行中的多个标记之间的另一间隙的第二位置不同的交叉处理方向上的第一位置。 控制器参考对应于包括第一多个标记，第二多个标记和第一行中的间隙的第一行标记的预定的一组图像数据来标识第一行标记。

    Dual encoder system to minimize reflex printing variation
    10.
    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.

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