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:
May. 05, 2015
Filed:
Jul. 03, 2012
Takenori Ohtoshi, Osaka, JP;
Norio Tomita, Osaka, JP;
Kiyoshi Sasoh, Osaka, JP;
Yuji Kumagai, Osaka, JP;
Takenori Ohtoshi, Osaka, JP;
Norio Tomita, Osaka, JP;
Kiyoshi Sasoh, Osaka, JP;
Yuji Kumagai, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In a registration step, the temperature near a polygon mirror () is detected by a first temperature sensor (), and the internal ambient temperature of an image forming apparatus () is detected by a second temperature sensor (). Also, a registration adjustment value of each color is determined and stored in a memory (). In a printing step, the registration adjustment value (A) of each color determined in the registration step is corrected based on a change in the temperature near the polygon mirror () and a change in the internal ambient temperature of the image forming apparatus (). Furthermore, the write timing of an electrostatic latent image onto each photosensitive drum () by an optical scanning device () is controlled. Then, the position of the electrostatic latent image on each photosensitive drum () is shifted by an amount corresponding to the corrected registration adjustment value.