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:
Feb. 12, 2019
Filed:
Jul. 11, 2018
Sumitomo Riko Company Limited, Aichi, JP;
Kunio Ito, Aichi, JP;
Masanori Satoh, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
Provided is a charging roll for an electrophotographic apparatus, which includes a surface layer that suppresses bleeding of a base layer component and achieves uniform resistance by improving the dispersibility of a conductive agent. A charging roll for an electrophotographic apparatus includes a shaft body, an elastic layer that is formed on the outer circumference of the shaft body, and a surface layer that is formed on the outer circumference of the elastic layer, wherein the surface layer contains the following components (A)-(D), i.e., at least one resin (A) selected from among fluororesins and fluorine-modified acrylic resins, a carbon black (B), an ester-based polymer dispersant (C) and a sulfonic acid-based dispersant (D).