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:
Oct. 12, 2021
Filed:
Nov. 12, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Shinichi Hagiwara, Tokyo, JP;
Yasukazu Ikami, Tokyo, JP;
Kosuke Ikada, Machida, JP;
Keitaro Nakata, Suntou-gun, JP;
Hideharu Shimozawa, Numazu, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A process cartridge using an image forming apparatus, including a rotatable image bearing member having a circumferential surface; a developing unit configured to supply a developing agent to the image bearing member; and a cleaning member that cleans the circumferential surface, wherein the developing agent contains a toner including toner particles and a metal soap, the image bearing member includes a plurality of grooves formed on the circumferential surface to extend in a circumferential direction of the circumferential surface and to be arranged side by side in a rotation axis direction, and the plurality of grooves and portions between the grooves form concave-convex portions on the circumferential surface. The circumferential surface of the image bearing member had surface roughness Rz of 0<Rz≤0.70 μm and average interval Sm between concave-convex portions on the circumferential surface of 0<Sm≤70.0 μm.