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. 19, 2023
Filed:
Jul. 27, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Shuichi Tetsuno, Kanagawa, JP;
Shinji Katagiri, Kanagawa, JP;
Koji An, Saitama, JP;
Hiroko Yokoyama, Tokyo, JP;
Wataru Takahashi, Tokyo, JP;
Shohei Ishio, Tokyo, JP;
Takayuki Tanaka, Tokyo, JP;
Tomonori Matsunaga, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus includes a rotatable image bearing member and a rotatable developing member to carry developer made up of toner particles and carrier particles adhered to surfaces of the toner particles. Where a pressing force pressing the developing member against the image bearing member is F, a total number of the carrier particles interposed between the toner particles and the image bearing member is N, and an adhesion Ft between a carrier particle and a toner particle, measured when the carrier particle is pressed against the toner particle with F/Nthat is a pressing force per unit carrier particle, and an adhesion Fdrbetween the carrier particle and the image bearing member, measured when the carrier particle is pressed against the image bearing member with F/N, satisfy Ft≤Fdr