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:
Feb. 10, 2004
Filed:
Jan. 30, 2002
Applicant:
Inventor:
Norio Takami, Mishima, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/502 ;
U.S. Cl.
CPC ...
G03G 1/502 ;
Abstract
A charging device includes a rotatable elastic charging roller, contactable to a member to be charged, for electrically charging the member to be charged. The charging device also includes a DC voltage source for applying a DC voltage to the charging roller. The voltage source is capable of controlling the width of a variation of the DC voltage, the variation being caused by passage of a deformed portion of the charging roller, resulting from contact between the member to be charged and the charging roller, by a charging region of the charging roller for the member to be charged, to be not more than 1%.