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. 26, 2015
Filed:
Mar. 14, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Takaaki Doshida, Moriya, JP;
CANON KABUSHIKI KAISHA, , JP;
Abstract
An image forming apparatus stabilized in transferability of an image from the photosensitive member to the intermediate transfer belt. The image forming apparatus includes photosensitive drums and an intermediate transfer belt (ITB) that rotates in contact with each drum, brushless DC motors for driving the drum and the ITB for rotation. Rotary encoders associated with the drum and the ITB detect respective rotational speeds thereof. A controller sets a target value for the drum-associated rotary encoder for making the surface speeds of the drum and the belt equal to each other during normal printing operation, from a detection value from the drum-associated rotary encoder in a state of the drum being friction-driven by the belt at the primary transfer section, and controls the drum-associated motor such that the target value becomes a detection value.