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    Apparatus and method for providing accurate layer registration for multiple layer electronic printing systems
    101.
    发明公开
    Apparatus and method for providing accurate layer registration for multiple layer electronic printing systems 失效
    装置和用于多层电子打印装置产生更准确的记录层的方法。

    公开(公告)号：EP0588551A1

    公开(公告)日：1994-03-23

    申请号：EP93307081.5

    申请日：1993-09-08

    Applicant: XEROX CORPORATION

    Inventor： Curry, Douglas N.

    IPC: H04N1/04 ,  H04N1/18

    CPC classification number: H04N1/0473 ,  G06K15/1271 ,  H04N1/1135 ,  H04N1/12 ,  H04N1/1912 ,  H04N2201/03162 ,  H04N2201/04748 ,  H04N2201/04781 ,  H04N2201/04787

    Abstract: An apparatus and method are disclosed for providing accurate layer registration for multiple layer electronic printing systems, typically multi-beam laser raster output scanners, in which accurate layer registration is critical. The method comprises determination of a time delay between page sync signal and start-of-scan signal, using this delay to determine a delay dependent offset factor called the phase registration parameter, and correctively mapping image data to proper output channels based on the phase registration parameter and the laser number. The phase registration parameter must be determined at the beginning of each scan layer and the offset factors must be re-adjusted based on the new phase delay.

    Abstract translation: 的装置和方法都是游离缺失光盘为多层电子印刷系统，其中准确的层配准是很关键通常多光束激光光栅输出扫描器提供准确的层配准。 该方法包括页面同步信号和启动的扫描信号之间的时间延迟的确定，使用这种延迟确定性矿称为相位登记参数的延迟相关的偏移因子，和校正性映射基于相位登记图像数据，以适当的输出信道 参数和激光数量。 相位登记参数必须是确定性的在每次扫描层的开始开采并基于新的相位延迟的偏移的因素必须重新调整。

    MULTIPLE CAMERA AUTOMATIC DIGITIZER WITH SKEW CORRECTION
    104.
    发明公开
    MULTIPLE CAMERA AUTOMATIC DIGITIZER WITH SKEW CORRECTION 失效
    自动数字化仪与SLANT失真校正多台摄像机。

    公开(公告)号：EP0125238A1

    公开(公告)日：1984-11-21

    申请号：EP83900119.0

    申请日：1982-11-10

    Applicant: RIDGE, Warren J. ,  ROBERTS, Dennis C.

    Inventor： RIDGE, Warren J. ,  ROBERTS, Dennis C.

    IPC: H04N1

    CPC classification number: H04N1/19584 ,  H04N1/047 ,  H04N1/195 ,  H04N1/19594 ,  H04N2201/02425 ,  H04N2201/03162 ,  H04N2201/0414 ,  H04N2201/0472 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04787 ,  H04N2201/04789 ,  H04N2201/04791

    Abstract: A multiple camera automatic digitizer includes a plurality of spaced video cameras (19) mounted within a housing (3) under a transparent digitizing surface (51). Multiplexing circuitry (37) multiplexes video signals from a selected video camera into a video amplifier (51), the output of which is converted to a digital number representing the darkness of the point of the document most recently scanned by a presently selected one of the video cameras. In accordance with the invention, the automatic digitizer includes a microprocessor (111), system controls that allows selection of various ones of the video cameras to achieve digitizing of corresponding areas of a large document, and computes skew correction factors for each camera as the basis of digitizing of a plurality of permanent alignment marks (P) on a bottom surface of a cover (11) for the digitizing surface. The skew correction factors are used to skew correct the camera data produced by the corresponding camera. The skew corrected lateral offset of each camera is computed by the microprocessor on the basis of the digitized coordinates of the alignment points and is used to automatically compute skew corrected, offset corrected document coordinates for all of the video cameras.

    A scanner system with automatic compensation of positioning errors
    108.
    发明授权
    A scanner system with automatic compensation of positioning errors 失效
    扫描自动位置误差补偿

    公开(公告)号：EP0849932B1

    公开(公告)日：2003-05-07

    申请号：EP97203908.5

    申请日：1997-12-12

    Applicant: Océ-Technologies B.V.

    Inventor： Classens, Wilhelmus Peter Johannes

    IPC: H04N1/193 ,  H04N1/047

    CPC classification number: H04N1/193 ,  H04N1/047 ,  H04N2201/02425 ,  H04N2201/03162 ,  H04N2201/04703 ,  H04N2201/04715 ,  H04N2201/04729 ,  H04N2201/04731 ,  H04N2201/04732 ,  H04N2201/04749 ,  H04N2201/04787 ,  H04N2201/04789 ,  H04N2201/04791 ,  H04N2201/04793

    Abstract: Apparatus for optically scanning a document and in so doing generating digital image data corresponding to local optical densities of the document, comprising a fixed glass plate, one side of which defines an original plane, transport means for transporting the said document in a sub-scanning direction in the original plane, at least two linear sensors situated in a main scanning direction, each comprising an array of opto-electrical converters and each provided with a lens which images on the sensor a linear observation area, situated in the original plane, the observation areas of the sensors being substantially in line and partially overlapping at the ends in the main scanning direction, an aligning element situated between the lenses and the original plane at a short distance from the latter in a position such that its perpendicular projection on to the original plane is situated within the overlapping ends of two adjoining observation areas, wherein the aligning element has a shape such that for each sensor in whose observation area it is situated the aligning element has a width in the main scanning direction which increases or decreases continuously as a function of the sub-scanning direction.

    VERFAHREN ZUR GRAVUR VON DRUCKZYLINDERN
    109.
    发明授权
    VERFAHREN ZUR GRAVUR VON DRUCKZYLINDERN 失效

    公开(公告)号：EP0986465B1

    公开(公告)日：2001-11-07

    申请号：EP98934805.7

    申请日：1998-05-27

    Applicant: Heidelberger Druckmaschinen Aktiengesellschaft

    Inventor： DÖLVES, Jürgen, Heinrich, Fritz

    IPC: B41C1/04 ,  H04N1/047

    CPC classification number: H04N1/1911 ,  B41C1/04 ,  H04N1/0473 ,  H04N1/2038 ,  H04N2201/03162 ,  H04N2201/0471 ,  H04N2201/04715 ,  H04N2201/04732 ,  H04N2201/04739 ,  H04N2201/04755 ,  H04N2201/04787 ,  Y10T409/302352 ,  Y10T409/302408 ,  Y10T409/302464 ,  Y10T409/30252

    Abstract: The invention relates to a method for engraving printing cylinders used for rotogravure in an electronic engraving machine. According to this said method, at least two engraving sections (A, B) of a given width (SB) are fitted next to each other, in the acial direct ion of the printing cylinder (1). These sections (AB) are engraved with their respective engraving element (3). Before engraving, an axial reference position is pre-set for each engraving element (3). The axial spacing between these reference positions corresponds to the pre-set widths (SB) of the engraving sections (A, B). The engraving elements (3) are placed approximately in their reference positions (RP). The differences in the axial spacing between the reference positions of the engraving elements (3) and the actual positions occupied as a result of the approximate positioning are then measured. During engraving, the engraving elements (3) are moved along the printing cylinder (1), still incorrectly spaced as a result of the approximate positioning. The spacing errors are compensated by displaced engraving of the engraving sections (A, b) on the printing cylinder (1), so that the engraving sections (A, B) have the pre-set widths (SB) despite the incorrect spacing between the graving elements (3).

    Abstract translation: 本发明涉及一种用于在电子雕刻机中雕刻用于轮转凹版的印刷滚筒的方法。 根据该方法，在印刷滚筒（1）的活塞直接离子中，至少两个给定宽度（SB）的雕刻部分（A，B）彼此相邻配合。 这些部分（AB）刻有各自的雕刻元件（3）。 在雕刻之前，为每个雕刻元件（3）预先设置轴向参考位置。 这些参考位置之间的轴向间距对应于雕刻部分（A，B）的预设宽度（SB）。 雕刻元件（3）大致位于其参考位置（RP）内。 然后测量雕刻元件（3）的参考位置与作为近似定位的结果占据的实际位置之间的轴向间距的差异。 在雕刻期间，雕刻元件（3）沿着印刷滚筒（1）移动，由于近似定位而仍然不正确地间隔开。 间距误差通过对印版滚筒（1）上的雕刻部分（A，b）进行移位雕刻来补偿，使得雕刻部分（A，B）具有预设宽度（SB），而不管 雕刻元素（3）。

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