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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.:

US 12704799 B1

PDFFull Text
Date of Patent:
Aug. 11, 2026

Filed:

Jan. 28, 2025

Electrophotographic roller, process cartridge, electrophotographic image forming apparatus, and method for manufacturing electrophotographic roller

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Yuki Nasuno, Shizuoka, JP;

Yoshitaka Suzumura, Shizuoka, JP;

Atsushi Noguchi, Shizuoka, JP;

Kazuaki Nagaoka, Shizuoka, JP;

Assignee:

CANON KABUSHIKI KAISHA, Tokyo, JP;

Attorney:

VENABLE LLP

Primary Examiner:

Sophia S Chen

Int. Cl.
CPC ...
G03G 15/00 (2006.01); C08G 18/48 (2006.01); C08L 33/08 (2006.01); C08L 75/04 (2006.01); G03G 15/02 (2006.01); G03G 15/08 (2006.01); G03G 15/16 (2006.01); G03G 21/18 (2006.01);
U.S. Cl.
CPC ...
G03G 15/0818 (2013.01); C08G 18/4854 (2013.01); C08L 33/08 (2013.01); C08L 75/04 (2013.01); G03G 15/0233 (2013.01); G03G 15/0291 (2013.01); G03G 15/1685 (2013.01); G03G 21/1814 (2013.01); G03G 2215/026 (2013.01); G03G 2215/0861 (2013.01); G03G 2215/0863 (2013.01);
Abstract

An electrophotographic roller has a substrate with a conductive outer surface. A resin layer is provided on a side of the outer surface of the substrate, in which the volume resistivity of the outer surface of the electrophotographic roller is 1.0×10Ω·cm or higher, when a corona discharger having a grid part is relatively moved along the axial direction of the electrophotographic roller to charge the electrophotographic roller, and the potentials of the outer surface after 0.06 seconds from passage of the grid part are measured, when a maximum value of the potentials is lower than 20.0 V, the ionization potential of the outer surface of the electrophotographic roller is 5.0 to 5.6 eV, and an elastic modulus Ein a region from the outer surface of the electrophotographic roller to a depth of 0.1 μm is 200 MPa or higher.

Find Patent Forward Citations

Nasuno, Yuki. (2026). Electrophotographic roller, process cartridge, electrophotographic image forming apparatus, and method for manufacturing electrophotographic roller (U.S. Patent No. 12704799). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12704799

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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