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:
Nov. 03, 2015
Filed:
Aug. 16, 2011
Hiromi Sakurai, Suntou-gun, JP;
Eiichiro Kimizuka, Mishima, JP;
Yuichiro Inaba, Chigasaki, JP;
Yasuhiro Fukase, Kawasaki, JP;
Toshiyuki Watanabe, Yokohama, JP;
Hiromi Sakurai, Suntou-gun, JP;
Eiichiro Kimizuka, Mishima, JP;
Yuichiro Inaba, Chigasaki, JP;
Yasuhiro Fukase, Kawasaki, JP;
Toshiyuki Watanabe, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A belt unit used for an image forming apparatus is provided. The belt unit includes a rotatable endless belt, a plurality of stretching members configured to stretch the belt, an urging member, and a contact and separation unit configured to be able to switch a position of the stretching member urged by the urging member. In moving the stretching member urged by the urging member from the separation position to the contact position, the contact and separation unit makes one end side of the stretching member urged by the urging member in a longitudinal direction coming into contact with the inner surface of the belt faster than the other end side, and temporarily decreases the movement speeds of the both ends of the stretching member in the longitudinal direction respectively before arriving at the contact position.