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:
Dec. 01, 2020
Filed:
Nov. 07, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kosuke Ikada, Machida, JP;
Katsuichi Abe, Susono, JP;
Kodai Hayashi, Suntou-gun, JP;
Yasukazu Ikami, Tokyo, JP;
Shinichi Hagiwara, Tokyo, JP;
Shuhei Kawasaki, Susono, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes a regulating member that regulates a developing agent that a developing agent carrying member carries in order to develop an electrostatic image, and a regulatory bias application portion that applies a regulatory bias to the regulating member, wherein the developing agent includes a toner containing a toner particle, inorganic silicon fine particles present on the surface of the toner particle, and a metal soap, wherein the amount of water-washing migration of the inorganic silicon fine particles is 0.20 mass % or less, wherein a peripheral speed ratio, which is a ratio of a peripheral speed of the developing agent carrying member to a peripheral speed of an image bearing member, has a range of 120% to 300%, and a dark portion potential Vd on the surface of the image bearing member and a regulatory bias Vb satisfy the relationship of Vd<Vb.