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:
Aug. 06, 1996
Filed:
Apr. 28, 1994
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355219 ; 361225 ;
Abstract
A charging member for charging a member to be charged includes a foamed layer; a supporting member for supporting the foamed layer, and for being supplied with a voltage; a resistance layer closer to the member to be charged than the foamed layer; wherein the foamed layer has a specific gravity not less than 0.1 (g/cm.sup.3) and not more than 0.6 (g/cm.sup.3), and wherein an average outer diameter of pores in a cross-section of said foamed layer is not less than 50 microns and not more than 1 mm.