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:
Dec. 04, 1990
Filed:
Aug. 01, 1989
Yasuo Miyauchi, Yokohama, JP;
Akio Takeda, Kawasaki, JP;
Haruo Uchida, Yokohama, JP;
Yasutsugu Saijo, Tokyo, JP;
Akihiro Nomura, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention relates to a process cartridge removably mountable on an image forming apparatus comprising a support, a rotary member having an image bearing surface and rotatably supported by the support, and a rotatable developing roller supported by the support, for carrying developer thereon and supplying the developer to the image bearing surface to develop a latent image formed on the image bearing surface. A first gear is arranged coaxial with the rotary member, a second gear is arranged coaxial with the developing roller and meshed with the first gear, and a guide means is provided for guiding the developing roller in a direction toward and away from the rotary member. The direction in which the developing roller is guided by the guide means is inclined with respect to a straight line connecting the center of rotation of the rotary member to the center of rotation of the developing roller, by an angle between 0.7.times..THETA. (.THETA. is a pressure angle of the second gear) and 1.3.times..THETA.. The cartridge further includes a bias means for biasing the developing roller toward the image bearing surface.