×

Document conveying apparatus, determination method, and computer-readable, non-transitory medium

  • US 10,196,222 B2
  • Filed: 06/06/2016
  • Issued: 02/05/2019
  • Est. Priority Date: 11/18/2015
  • Status: Active Grant
First Claim
Patent Images

1. A document conveying apparatus comprising:

  • a light source;

    a first roller for conveying a conveyed document;

    a second roller which contacts with the conveyed document and rotates as the document is conveyed;

    a disk including a plurality of slits spaced apart with a predetermined interval in a rotation direction of the disk, the disk rotating in the rotation direction with a rotation speed, by the rotation of the second roller;

    a light reception element at a position facing the light source with the disk interposed therebetween;

    a first signal generator for generating a first signal in accordance with light received by the light reception element;

    a second signal generator for generating a second signal obtained by removing, from the first signal, a noise component of the light according to the rotation speed of the disk; and

    a controller for determining whether the document is conveyed by comparing the second signal with a signal value of a delayed signal obtained by delaying the second signal by a predetermined period of time, wherein the predetermined period of time is greater than zero.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×