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:
Dec. 07, 2021
Filed:
Mar. 24, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroki Katayama, Suntou-gun, JP;
Jun Nagatoshi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus for forming an image in accordance with image information on a sheet includes a photosensitive member; a scanner unit for scanning the member with a laser beam in accordance with the information, the scanner unit including a source for emitting the beam, a deflector having a polygonal mirror for reflecting the beam to deflect it, and a sensor for receiving the beam deflected by the deflector; a controller for controlling scanning start timing of the beam in response to an output of the sensor. A reference position of scanning lines of the beam in a sub-scan direction and a center position of a receipt surface of the sensor in the direction are deviated from each other. For all scanning lines by reflecting surfaces of the rotatable polygonal mirror, only parts, in the direction, of the scanning lines pass the receipt surface of the sensor.