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:
Feb. 26, 2013
Filed:
Mar. 14, 2008
Yasumasa Tomita, Mitaka, JP;
Yasumasa Tomita, Mitaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An optical scanning unit used in an image forming apparatus having a latent image carrier includes a light emitter, a rotary deflector, an inclination adjustment unit, and a controller. The light emitter emits a light beam. The rotary deflector deflects and scans the light beam onto a surface of the latent image carrier. The inclination adjustment unit adjusts an inclination of a scan line corresponding to the light beam relative to a reference scan line on the latent image carrier. The controller changes at least one of a linear velocity of the latent image carrier and a rotation speed of the rotary deflector so as to change a ratio between the linear velocity of the latent image carrier and a scan speed of the light beam, and controls the inclination adjustment unit based on the ratio to keep the scan line from inclining relative to the reference scan line.