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. 20, 2026
Filed:
Jun. 06, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Hirokazu Fujino, Shizuoka, JP;
Motonari Ito, Shizuoka, JP;
Naoki Fukushima, Shizuoka, JP;
Masahiro Kurachi, Shizuoka, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes an image bearing member, a charging roller, a cleaning roller and a developing member. The charging roller is provided with a surface contacting a surface of the image bearing member and charges the surface of the image bearing member. The cleaning roller is provided with an elastic foam layer contacting the surface of the charging roller cleans the surface of the charging roller. A storage elastic modulus of the surface of the charging roller measured in a measuring environment of 23° C., 50% RH and a measuring frequency of 10 Hz is defined as E'C and a storage elastic modulus of the elastic foam layer of the cleaning roller is defined as E′CC. The storage elastic modulus E′C of the surface of the charging roller and the storage elastic modulus E′CC of the elastic foam layer of the cleaning roller satisfy E′C>E′CC.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile