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Sheet process apparatus and control method thereof

  • US 10,046,939 B2
  • Filed: 08/05/2015
  • Issued: 08/14/2018
  • Est. Priority Date: 08/05/2015
  • Status: Active Grant
First Claim
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1. A sheet process apparatus, comprising:

  • a feed unit configured to feed a plurality of sheets one-by-one; and

    a process unit configured to process one-by-one the sheets fed by the feed unit;

    wherein the sheet comprises;

    a one or two-dimensional code printed on a first or second surface thereof;

    wherein the process unit comprises;

    a process mechanism configured to conduct a predetermined process for the sheet; and

    a transfer mechanism configured to transfer the process mechanism;

    wherein the sheet process apparatus further comprises;

    a memory part configured to store both a plurality of position information on the process mechanism and a reference position of the code;

    a camera configured to image the code printed on the sheet fed by the feed unit; and

    a control unit configured to control an operation of the transfer mechanism;

    wherein the control unit comprises;

    an acquisition part configured to acquire an image data of the code imaged by the camera;

    a read part configured to read information of the code from the image data acquired by the acquisition part;

    a position measure part configured to measure a real position of the code from the image data acquired by the acquisition part;

    a retrieval part configured to retrieve the position information corresponding to the information of the code read by the acquisition part, from a plurality of the position information on the process mechanism stored in the memory part;

    a calculation part configured to calculate an amount of deviation between the real position of the code measured by the position measure part and the reference position of the code stored in the memory part;

    a determination part configured to correct the position information on the process mechanism retrieved by the retrieval part on the basis of the amount of deviation calculated by the calculation part so as to determine a target position of the process mechanism; and

    a target position output part configured to output the target position of the process mechanism determined by the determination part toward the transfer mechanism; and

    wherein the transfer mechanism transfers the process mechanism toward the target position of the process mechanism output from the target position output part;

    wherein the position measure part comprises;

    an outline recognition part configured to recognize an outline of the code on the basis of the image data; and

    a coordinate measure part configured to measure a coordinate of predetermined one point on the outline of the code recognized by the outline recognition part;

    wherein the predetermined one point is disposed on one corner of the outline of the code;

    wherein the coordinate measure part is con figured to sub-pixel process the image data acquired by the acquisition part within limited area of the one corner so as to measure a coordinate of the corner; and

    wherein the position measure part comprises;

    an angle measure part configured to measure an angle of a line connected with predetermined two points on the outline of the code recognized by the outline recognition part;

    a judge part configured to judge whether the angle measured by the angle measure part is more than a predetermine angle; and

    a stop signal output part configured to output a signal for stopping the sheet process apparatus when the judge part judges that the angle is more than the predetermined angle.

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