The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 1990
Filed:
Nov. 15, 1988
Hiroyuki Harada, Sakai, JP;
Tetsuji Kajitani, Kawanishi, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
An image forming apparatus includes a movable optical system for reading an original image, a motor for driving the optical system, a motor driving circuit, an encoder which outputs signals responsive to velocities of the motor, a control circut which controls the motor driving circuit such that the optical system starts from a home position and turns at a predetermined point to return again to the home position, and applies braking to the motor when the optical system is stopped at the home position, and a microcomputer for deciding timing to apply braking in response to an output of the encoder. By deciding brake timing in response to the output of the encoder, the optical system can be stopped accurately at the home position even when a moving load is abnormally increased due to stains on component members forming a running path for the optical system, or due to replacement of the optical system.