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:
Jan. 15, 2013
Filed:
Oct. 26, 2011
Tetsuya Sano, Mishima, JP;
Akimichi Suzuki, Yokohama, JP;
Yuki Nishizawa, Susono, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A circumferential length of a belt is measured within a short period of time. A plurality of marks is provided on a belt. Distances between the marks are set to be all different from each other. The distance between the marks is set to allow the mark to be identified by measuring a period of time between the detection of one mark and that of the next mark even if the length of the belt is changed to some degree by the expansion of the belt or the like. Then, a period of time between the identified mark and the next mark is accurately measured. The total circumferential length of the belt is measured based on the results of measurement.