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. 16, 2000
Filed:
Oct. 02, 1995
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355271 ;
Abstract
A contact type image transferring device and method incorporated in an image forming apparatus for cleaning a residual toner on a transfer roller. The transfer roller is in contact with a photoconductive drum at a first force and forms nip between the roller and the drum. A sheet of paper passes through the nip and a toner image on the drum is transferred to the sheet of paper. When the sheet of paper is not at the nip, the transfer roller is moved such that the force of the roller against the drum is a second force which is different from the first force. A cleaning bias voltage is applied to the roller and toner on the roller is transferred to the drum.