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. 28, 1996
Filed:
Nov. 18, 1993
Seiichi Miyakawa, Nagareyama, JP;
Shigeru Suzuki, Yokohama, JP;
Kazuaki Iizuka, Tokyo, JP;
Yoshiyumi Tamiya, Yokohama, JP;
Kenichi Shimizu, Kawasaki, JP;
Harumitsu Mashiko, Tokyo, JP;
Takashi Seto, Ayase, JP;
Eishu Ohdake, Tokyo, JP;
Tadahiro Suzuki, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus for electrostatically transferring a latent image formed on a photoconductive drum or similar image carrier to a recording medium held by a clamp drum or similar medium conveying member. The clamp drum has a cylinder or base made of aluminum, a conductive rubber layer covering the cylinder, and an overcoat layer covering the rubber layer and higher in electric resistance than the rubber layer. A bias voltage for latent image transfer is applied while the rubber layer is connected to ground. The photoconductive drum and clamp drum are pressed against each other by a predetermined force, the former following the rotation of the latter. The photoconductive drum is provided with a photoconductor having a great electrostatic capacity, thereby preventing the effective transfer voltage at the time of image transfer from increasing.