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. 14, 2012
Filed:
May. 22, 2009
Masato Koyanagi, Mishima, JP;
Shinji Katagiri, Yokohama, JP;
Masahiro Yoshida, Tokyo, JP;
Kazunori Hashimoto, Numazu, JP;
Hisashi Yamauchi, Numazu, JP;
Masato Koyanagi, Mishima, JP;
Shinji Katagiri, Yokohama, JP;
Masahiro Yoshida, Tokyo, JP;
Kazunori Hashimoto, Numazu, JP;
Hisashi Yamauchi, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A toner supplying roller which is used in a developing apparatus and has the following characteristics: (1) an average diameter of a foam cell opening portion on a surface of a foam elastic member is 100 to 800 μm, (2) an unopened cell closed by a skin layer of a film thickness of 50 μm or less is present in the surface of the foam elastic member, and (3) assuming that a surface area of the foam elastic member is A, a total area of the foam cell opening portions is B, and a surface area of the unopened cell is C, the following relationship is satisfied: