×

Original scanning apparatus and image forming apparatus

  • US 5,124,744 A
  • Filed: 08/22/1990
  • Issued: 06/23/1992
  • Est. Priority Date: 08/30/1989
  • Status: Expired due to Fees
First Claim
Patent Images

1. An original scanning apparatus, comprising:

  • means for scanning an original supported by a supporting member;

    a step motor energized by an exciting current, for moving to advance and return said scanning means;

    means for driving said step motor by supplying an exciting current to said step motor; and

    means for controlling said driving means such that the torque of said motor is increased by increasing said exciting current during an interval from a start of a movement in a first direction of said scanning means to an end of an acceleration movement in a second direction opposite to said first direction of said scanning means.

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