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:
Jun. 15, 2021
Filed:
Apr. 15, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Takashi Mukai, Kawasaki, JP;
Takayuki Namiki, Yokohama, JP;
Taichi Sato, Yokohama, JP;
Yuki Yamamoto, Shiroi, JP;
Kazunari Hagiwara, Yokohama, JP;
Minoru Nakamura, Mishima, JP;
Takahiro Kawamoto, Yokohama, JP;
Yasukazu Ikami, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developer bearing member including: a rotational shaft; and an elastic layer on an outer circumference surface of the rotational shaft, developer being borne on a surface of the elastic layer, wherein the elastic layer is configured such that a load per unit area of a contact portion between one surface of a flat glass plate and the surface of the elastic layer is to be 5.8 N/mmor more, in a state that the one surface of the flat glass plate being parallel with an axis direction of the rotational shaft and the one surface of the flat glass plate coming into contact with the surface of the elastic layer with a predetermined penetration level, and wherein a ten-point average roughness Rzjis on the surface of the elastic layer is greater than a volume-average particle diameter of a particle of the developer.