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:
May. 19, 2020
Filed:
Sep. 12, 2019
Sumitomo Riko Company Limited, Aichi, JP;
Kentaro Imai, Aichi, JP;
Kadai Takeyama, Aichi, JP;
Yutaka Kadoshima, Aichi, JP;
Kosuke Minematsu, Aichi, JP;
Satoshi Tatsumi, Aichi, JP;
Sumitomo Riko Company Limited, Aichi, JP;
Abstract
Provided is a development roll for electrophotography devices in which image defects are suppressed and which achieve both maintenance of high charging properties and discharging properties. The development roll is provided with a shaft member, an elastic substance layer formed on the outer circumference of the shaft member, an intermediate layer formed on the outer circumference of the elastic substance layer, and a surface layer formed on the outer circumference of the intermediate layer. The volume resistivity of the surface layeris within the range of 1.0×10to 1.0×10Ω·cm, and the volume resistivity of the intermediate layeris within the range of 1.0×10to 1.0×10Ω·cm.