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. 31, 2023
Filed:
Oct. 18, 2022
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroomi Kojima, Kanagawa, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An electrophotographic belt includes a biaxially stretched cylindrical film as a base layer, wherein the biaxially stretched cylindrical film includes crystalline polyester, amorphous polyester and carbon black, a content of the carbon black with respect to the biaxially stretched cylindrical film is 2.0% by mass or more, and a surface resistivity measured on the surface of the biaxially stretched cylindrical film in an environment of 23° C. and 50% RH is 1×10Ω/square or higher and 1×10Ω/square or lower, and A/B is 3.00 or smaller, where A (Ω/square) represents a surface resistivity of the biaxially stretched cylindrical film after the film is left to stand for 24 hours in an environment of 23° C. and 50% RH, and B (Ω/square) represents a surface resistivity of the biaxially stretched cylindrical film after the film is left to stand for 24 hours in an environment of 30° C. and 80% RH.