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. 02, 1982
Filed:
Feb. 03, 1981
Tsuyoshi Watanabe, Kawasaki, JP;
Hidetoshi Murase, Yokohama, JP;
Akira Murayama, Yokohama, JP;
Mikio Nakasugi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An elastic roller composed of an axial core member and an elastic, liquid retentive layer of foam structure with uniform layer thickness surrounding the circumference of said core member, said elastic roller further comprising a flexible, liquid permeable member in the form of a cylinder or sleeve having an inner diameter smaller than the outer diameter of said roller, said flexible member being disposed to cover the circumference of said roller and having extensions extending beyond both side ends of said roller and being shrunk along the ends of said elastic foam structure layer at both sides, respectively, so as to cover also said side ends of the layer with said flexible member. A method of making the elastic roller is also disclosed.