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:
Jul. 12, 2022
Filed:
Sep. 14, 2021
Sumitomo Riko Company Limited, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
A development roller for an electrophotographic device that can both reduce resistance and suppress bleeding-out of an ion-conducting agent is provided. A development roller for an electrophotographic deviceis provided with a shaft body, an elastic body layerformed on the outer periphery of the shaft body, and a surface layer formed on the outer periphery of the elastic body layer. The surface layerincludes the following constituents (a) to (c), and the content of constituent (b) is 3.0 to 60 parts by mass, relative to 100 parts by mass of constituent (a). Constituent (a) is a binder comprising acrylonitrile-butadiene rubber, where the content of acrylonitrile is 31 mass % or more and 36 mass % or less. Constituent (b) is an ion-conducting agent. Constituent (c) is an acrylic polymer comprising at least one selected from among a silicone group and a fluorine group.