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:
Apr. 18, 2006
Filed:
Apr. 15, 2003
Takeshi Kawamura, Shizuoka-ken, JP;
Koichi Otaka, Shizuoka-ken, JP;
Yasushi Shimizu, Shizuoka-ken, JP;
Yasunori Chigono, Susono, JP;
Ken Nakagawa, Mishima, JP;
Hikaru Osada, Numazu, JP;
Takeshi Kawamura, Shizuoka-ken, JP;
Koichi Otaka, Shizuoka-ken, JP;
Yasushi Shimizu, Shizuoka-ken, JP;
Yasunori Chigono, Susono, JP;
Ken Nakagawa, Mishima, JP;
Hikaru Osada, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member; a charging member for electrically charging the image bearing member; developing means for developing with a developer an electrostatic latent image formed on the image bearing member, the developing means having a developer carrying member for carrying the developer, wherein a gap is formed between the developer carrying member and the image bearing member; bias voltage applying means for applying a bias voltage to the developer carrying member, wherein the bias applying means applies an AC bias when the electrostatic latent image is developed, wherein the developing means is capable of collecting the developer fro the image bearing member, and an amplitude of an AC bias voltage applied to the developer carrying member by the bias applying means when the the developer is collected, is larger than that when the the electrostatic latent image is developed.