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. 14, 2013
Filed:
Apr. 10, 2012
Masahide Hirai, Numazu, JP;
Yoshiro Saito, Susono, JP;
Kazuhiro Funatani, Mishima, JP;
Hiroyuki Seki, Mishima, JP;
Tatsuya Kinukawa, Mishima, JP;
Yasutaka Yagi, Numazu, JP;
Masahide Hirai, Numazu, JP;
Yoshiro Saito, Susono, JP;
Kazuhiro Funatani, Mishima, JP;
Hiroyuki Seki, Mishima, JP;
Tatsuya Kinukawa, Mishima, JP;
Yasutaka Yagi, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided an image forming apparatus including a rotation member used for image forming and a detector for detecting light from the rotation member. First waveform data of an image-formed surface used to form an image on the rotation member is acquired by the detector. Second waveform data of the image-formed surface used to form an image on the rotation member is acquired. The second waveform data includes at least part of a detected section of the first waveform data. Information on the actual circumference of the rotation member is calculated based on matching between the acquired first and second waveform data. The acquired first waveform data and second waveform data are compared to determine whether or not to use the calculated information on the circumference. When it is determined not to use the calculated information on the circumference, information on the circumference of the rotation member is recalculated.