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. 04, 2000
Filed:
Nov. 28, 1994
Katsuhiko Nishimura, Yokohama, JP;
Kimio Nakahata, Kawasaki, JP;
Masuo Yamazaki, Yokohama, JP;
Masami Takeda, Kawasaki, JP;
Hiromichi Yamada, Yokohama, JP;
Tatsuya Nakamura, Tokyo, JP;
Tohru Saitou, Yokohama, JP;
Tohru Kosaka, Machida, JP;
Takashi Shibuya, Kawasaki, JP;
Yasuo Yoda, Kawasaki, JP;
Masahide Hirai, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus including a rotatable developing member having a plurality of developing devices for developing an image bearing member at a first developing station, and a second single developing device arranged upstream of the rotatable developing member for developing the image bearing member exclusively at a second developing station different from the first developing station. The second developing device has a cover portion covering the rotatable developing member, and a portion of the cover portion is disposed at a position spaced apart from a rotation axis of the rotatable developing member by a predetermined length in a horizontal direction away from the image bearing member. The rotatable developing member rotates in an opposite direction with respect to the direction of rotation of the image bearing member to prevent toner from scattering toward the optical system.