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:
Mar. 28, 2017
Filed:
Jul. 13, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Yutaka Arai, Kawasaki, JP;
Takeshi Suzuki, Yokohama, JP;
Jun Miura, Kawasaki, JP;
Shigeaki Takada, Abiko, JP;
Toshinori Nakayama, Kashiwa, JP;
Naoki Akiyama, Toride, JP;
Daigo Matsuura, Tokyo, JP;
Yasuhiro Miyahara, Tokyo, JP;
Akeshi Asaka, Kashiwa, JP;
Shuichi Tamura, Moriya, JP;
Katsuhisa Matsunaka, Inagi, JP;
Shinsuke Takahashi, Kashiwa, JP;
Hiroto Sugimoto, Toride, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An elastic layer includes a needle-shaped filler and a void and has a porosity of 20 vol % or more and 60 vol % or less. The elastic layer contains a first area and a second area. The first area extends from a surface of the elastic layer opposite to a surface facing the mandrel toward the mandrel and has a thickness of 30% of the thickness of the elastic layer. The second area is a central area in a thickness direction of the elastic layer and has a thickness of 40% of the thickness of the elastic layer. The needle-shaped filler in the second area has an orientation degree of 50% or lower. The needle-shaped filler in the first area has an orientation degree higher than that of the needle-shaped filler in the second area.