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. 02, 2019
Filed:
Dec. 07, 2016
Sumitomo Rubber Industries, Ltd., Kobe-Shi, Hyogo, JP;
Yuta Imase, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
Abstract
A developing roller () is provided, which includes a tubular porous inner layer () of a foamed product of a semiconductive rubber composition containing an ethylene propylene rubber and a paraffin oil, and an outer layer () of a seamless tube of a semiconductive thermoplastic polyamide elastomer provided on an outer peripheral surface () of the inner layer (), and has an overall Asker-C hardness of not less than 30 degrees and not greater than 60 degrees. A production method is also provided, which includes the steps of: preparing a tube having a thickness T of 100 to 400 μm and having an inner diameter Dfor an outer layer; preparing a tubular inner layer having an outer diameter D; and press-inserting the inner layer into the tube; wherein an interference represented by a difference D- Dbetween the outer diameter Dof the inner layer and the inner diameter Dof the tube is 100 to 400 μm.