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. 16, 2002
Filed:
Nov. 03, 2000
Applicant:
Inventor:
Masamichi Sato, Saitama, JP;
Assignee:
Keytech Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/502 ; G03G 1/516 ;
U.S. Cl.
CPC ...
G03G 1/502 ; G03G 1/516 ;
Abstract
A charging device or a transfer device used for an electrophotographic printer includes a charging unit. In this charging unit, a shaft is loosely encased by a conductive elastic cylinder. Further, the conductive elastic cylinder is loosely encased by a seamless charging tube. As to the charging device, the charging unit is pressed against a photosensitive drum. The seamless charging tube and the conductive elastic cylinder are driven to rotate in association with a rotation of the photo sensitive drum. A charging voltage is applied between the seamless charging tube and the photosensitive drum.