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    IMPROVED BI-CELL CHEVRONS DETECTION COLOR REGISTRATION SYSTEM FOR COLOR PRINTING
    2.
    发明专利
    IMPROVED BI-CELL CHEVRONS DETECTION COLOR REGISTRATION SYSTEM FOR COLOR PRINTING 未知

    公开(公告)号：CA2363891C

    公开(公告)日：2005-04-12

    申请号：CA2363891

    申请日：2001-11-27

    Applicant: XEROX CORP

    Inventor： LOFTHUS ROBERT M ,  BORTON MICHAEL D ,  WALLACE STANLEY J

    IPC: G03G15/01 ,  H04N1/50 ,  B41J2/525 ,  B41F21/12 ,  B41F21/14

    Abstract: In color printing with a color registration system for the registration of plural color images on an image bearing surface, such as a photoreceptor belt of a color printer, chevron shaped registration marks are imaged on the image bearing surface, which registration marks correspond to the color images and are sensed by a registration marks sensor as the image bearing surface moves in its process direction. The registration marks sensor has chevron shaped optical sensing areas provided by a matching pair of spaced apart elongated bi-cell detector s in a generally chevron shaped pattern. Each of these spaced apart elongated bi-ce ll detectors has a parallelogram shaped optical sensing area. That parallelogra m shaped sensing area is defined by elongated parallelogram sides extending at the same angle as one leg of the chevron shaped registration marks, and parallelogram ends which are parallel to the process direction, so as to provide higher color registration accuracy.

    4.
    发明专利
    未知

    公开(公告)号：BR0105748A

    公开(公告)日：2002-07-02

    申请号：BR0105748

    申请日：2001-11-29

    Applicant: XEROX CORP

    Inventor： CASELLA JAMES M ,  COSTANZA DANIEL W ,  LOFTHUS ROBERT M ,  OMELCHENKO MARK A ,  MARTIN MICHAEL J ,  HOU JAMES S ,  WING JOSEPH M ,  FURST MICHAEL R ,  LACAYO ORLANDO J ,  ADILETTA MARK A ,  LEO MICHAEL F ,  AHL DAVID K ,  BRESSLER LOUIS J ,  SIRIANNI JOHN F

    IPC: G03G21/00 ,  G03G15/00 ,  G03G15/01

    Abstract: A belt drive module and a corresponding method includes or employs a belt (10) that moves along a path, at least one support roller (12) or other structure that supports the belt as it moves along the path, a drive roller (11) that effects movement of the belt along the path, a tension roller (74) that applies a tension force to the belt in order to maintain engagement of the belt with the drive and/or support rollers, at least one processing station (e.g., an image processing station) disposed along the path that performs a process relative to a predetermined position of the belt, and a torque assist drive that applies a torque assist force (Td) at a location between the drive roller and the tension roller. Torque assist may be provided by a current limited DC motor or by a constant torque friction clutch applied to a roller (66), e.g., a stripper roller of an electrophotographic imaging system. Advantageously, the torque assist force (Td) facilitates accurate positioning of the belt (e.g., latent image registrations in a color imaging process employing multiple imaging processing stations) by reducing slippage between the drive roller and the belt that may be encountered due to belt wear, toner contamination and/or other debris.

    5.
    发明专利
    未知

    公开(公告)号：BR0105748B1

    公开(公告)日：2014-08-12

    申请号：BR0105748

    申请日：2001-11-29

    Applicant: XEROX CORP

    Inventor： CASELLA JAMES M ,  COSTANZA DANIEL W ,  OMELCHENKO MARK A ,  MARTIN MICHAEL J ,  HOU JAMES S ,  WING JOSEPH M ,  FURST MICHAEL R ,  LACAYO ORLANDO J ,  ADILETTA MARK A ,  LEO MICHAEL F ,  AHL DAVID K ,  BRESSLER LOUIS J ,  SIRIANNI JOHN F ,  LOFTHUS ROBERT M

    IPC: G03G15/01 ,  G03G21/00 ,  G03G15/00

    Abstract: A belt drive module and a corresponding method includes or employs a belt (10) that moves along a path, at least one support roller (12) or other structure that supports the belt as it moves along the path, a drive roller (11) that effects movement of the belt along the path, a tension roller (74) that applies a tension force to the belt in order to maintain engagement of the belt with the drive and/or support rollers, at least one processing station (e.g., an image processing station) disposed along the path that performs a process relative to a predetermined position of the belt, and a torque assist drive that applies a torque assist force (Td) at a location between the drive roller and the tension roller. Torque assist may be provided by a current limited DC motor or by a constant torque friction clutch applied to a roller (66), e.g., a stripper roller of an electrophotographic imaging system. Advantageously, the torque assist force (Td) facilitates accurate positioning of the belt (e.g., latent image registrations in a color imaging process employing multiple imaging processing stations) by reducing slippage between the drive roller and the belt that may be encountered due to belt wear, toner contamination and/or other debris.

    7.
    发明专利
    未知

    公开(公告)号：DE60109544D1

    公开(公告)日：2005-04-28

    申请号：DE60109544

    申请日：2001-08-30

    Applicant: XEROX CORP

    Inventor： OMELCHENKO MARK A ,  LOFTHUS ROBERT M ,  COSTANZA DANIEL W ,  RAMIREZ OLGA Y

    IPC: G03G15/01 ,  H04N1/50 ,  H04N1/047

    Abstract: In color printing with a color registration system for the registration of plural color images on an image bearing surface, such as a photoreceptor belt (12) of a color printer, registration marks (32) are imaged on the image bearing surface, which registration marks correspond to the color images and are sensed by a registration marks sensor (22). The system first automatically images first registration marks (32), preferably "Z" targets, which provide wider initial mis-registration latitude for the sensor (22) for gross registration. When an initial registration is achieved, the system automatically switches to imaging second registration marks (36), preferably chevron targets, providing higher registration accuracy for the sensor (22). These registration targets may be generated along opposite sides of the image area on opposite sides of the photoreceptor (12) or other belt.

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