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, 2012
Filed:
May. 21, 2010
Noriyuki Chino, Kawasaki, JP;
Yuji Uramoto, Tokyo, JP;
Shoji Kanemura, Sagamihara, JP;
Kota Kiyama, Kawasaki, JP;
Junji Yasuda, Kawasaki, JP;
Katsuhiko Takano, Yokohama, JP;
Yoshinobu Sekiguchi, Machida, JP;
Noboru Koumura, Narashino, JP;
Noriyuki Chino, Kawasaki, JP;
Yuji Uramoto, Tokyo, JP;
Shoji Kanemura, Sagamihara, JP;
Kota Kiyama, Kawasaki, JP;
Junji Yasuda, Kawasaki, JP;
Katsuhiko Takano, Yokohama, JP;
Yoshinobu Sekiguchi, Machida, JP;
Noboru Koumura, Narashino, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus capable of enhancing the accuracy of the scanning position of a laser beam to thereby obtain a more precise image. Optical sensors detect reflected light from a surface of a photosensitive drum. During image formation, the apparatus detects the scanning speed of the laser beam in a main scanning direction based on detection signals from the respective optical sensors in each of divisional sections of an image forming area in the main scanning direction. The apparatus corrects magnification of the image in the main scanning direction, based on results of detection of the scanning speed of the laser beam in the main scanning direction.