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. 23, 1995
Filed:
Nov. 22, 1993
Applicant:
Inventors:
Fumihiro Arahira, Kanagawa, JP;
Tsuyoshi Watanabe, Ebina, JP;
Takao Honda, Yokohama, JP;
Makoto Yanagida, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355219 ; 361225 ;
Abstract
A charging device includes a member to be charged, and a charging member for charging the member to be charged. The charging member includes a surface layer which can contact the surface of the member to be charged. A voltage is applied between the member to be charged and the charging member. The contact angle with water .gamma..sub.R of the surface layer of the charging member is greater than the contact angle with water .gamma..sub.D of the surface of the member to be charged. An image forming apparatus includes the above-described charging device.