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    2.
    发明专利
    未知

    公开(公告)号：BR9902379A

    公开(公告)日：2000-01-18

    申请号：BR9902379

    申请日：1999-05-03

    Applicant: XEROX CORP

    Inventor： RAKER CATHLEEN J ,  LAM-CHON SUE K ,  WALLER PATRICK O ,  MAURER DANIEL R ,  WARD JOSEPH W ,  BRACCO ROSARIO A ,  SHAUL RONALD E ,  MARA ROBERT M ,  MONGEON RAYMOND L ,  MASTRANDREA JOSEPH A ,  PAPALEO PATRICIA A ,  TREMAINE COLLEEN

    IPC: G03G15/00 ,  G03G21/00

    Abstract: There is provided a method for use with a printing machine having a movable imaging member and a projecting system for modulating a beam and projecting an image into the movable imaging member. The printing machine further includes a developer for application of developer material to the image projected onto the movable imaging member for transfer of the image to a print media sheet. The method, which is intended for use in controlling exposure of a test patch on the movable imaging member includes the steps of: a) providing a time-keeping device with the time-keeping device including a variable value which is either incrementable or decrementable; b) detecting a signal indicating that the movable imaging member is positioned relative to the beam in a selected orientation, wherein the movable imaging member passes by the beam at a selected speed; c) providing a reference value with the reference value varying as a function of the selected speed; d) in response to the detecting of (b), modulating the beam, relative to the movable imaging member, so as to expose a portion for the test patch; e) concurrent with the modulating of (d), incrementing or decrementing the variable value of the time keeping device; and f) repeating said modulating of (d) until the value of the variable value is about equal to the reference value and the test patch is exposed.

    METHOD AND DEVICE FOR COLOR-PRINTING BY USING COLOR REGISTRATION SYSTEM
    5.
    发明专利
    METHOD AND DEVICE FOR COLOR-PRINTING BY USING COLOR REGISTRATION SYSTEM 审中-公开

    公开(公告)号：JP2002139881A

    公开(公告)日：2002-05-17

    申请号：JP2001270002

    申请日：2001-09-06

    Applicant: XEROX CORP

    Inventor： OMELCHENKO MARK A ,  LOFTHUS ROBERT M ,  COSTANZA DANIEL W ,  RAMIREZ OLGA Y ,  KERXHALLI DAVID M ,  CONROW BRIAN R ,  SHAUL RONALD E ,  WALLACE STANLEY J

    IPC: G03G21/14 ,  G03G15/01 ,  H04N1/50

    Abstract: PROBLEM TO BE SOLVED: To provide a registration system which accurately registers a color image on an image supporting member of a color printer to another color image. SOLUTION: In color printing using a color registration system for registering a plurality of color images on a photoreceptor belt 12 of the color printer 10, a register mark is image-formed on an image supporting surface. The register mark corresponds to the color image and is detected by register mark sensors 20A, 20B. In an initial general registration mode, a first register mark of an extended angular target 36 shape is automatically image-formed at first. Even when initial general misregistration is present, the extended angular target 36 is largely extended in a processing direction in order to avoid overlapping of the marks. A second register mark (a standard angular target 34 or the like) by which higher registration accuracy can be obtained when allowable initial registration is attained and which is arranged at a narrower space and has denser distribution, is image-formed. The registration targets 34, 36 can be generated along both sides of an image region 30 in the processing direction.

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