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:
Jan. 11, 2005
Filed:
Oct. 29, 2002
Satoshi Otake, Shizuoka, JP;
Yasuhide Goseki, Kanagawa, JP;
Masayoshi Shimamura, Kanagawa, JP;
Yasutaka Akashi, Kanagawa, JP;
Kenji Fujishima, Kanagawa, JP;
Kazunori Saiki, Kanagawa, JP;
Naoki Okamoto, Shizuoka, JP;
Satoshi Otake, Shizuoka, JP;
Yasuhide Goseki, Kanagawa, JP;
Masayoshi Shimamura, Kanagawa, JP;
Yasutaka Akashi, Kanagawa, JP;
Kenji Fujishima, Kanagawa, JP;
Kazunori Saiki, Kanagawa, JP;
Naoki Okamoto, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a developing assembly including a two-component developer container and a developer-carrying member, the developer-carrying member has at least a substrate and a resin coat layer formed on the substrate surface, and the resin-coat layer contains at least a binder resin and solid particles for making the resin-coat-layer surface uneven. The solid particles have an average circularity of 0.64 or more, which is the average value of the values calculated according to the equationCircularity=(4×)/{()×Π},(wherein ML represents the Pythagorean-method maximum length of a particle projected image, and A represents the projected area of a particle image), and the resin-coat layer has a surface roughness fulfilling specific conditions attributable to the solid particles. Also disclosed are an image-forming apparatus and a process cartridge which employ the developing assembly.