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:
Sep. 23, 1997
Filed:
Apr. 02, 1996
Tsutomu Sawa, Fujisawa, JP;
Hiroyuki Takenoshita, Yokohama, JP;
Toshiki Hada, Fujisawa, JP;
Hirohide Komatsu, Machida, JP;
K R D Corporation, Kanagawa-ken, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
There is provided a paper feed roller capable of being used for delivering and feeding paper, which is high in coefficient of friction, has sufficient hardwearing properties with the coefficient of friction not affected by the change in environment of temperature and humidity, is low in ink transferability and is small in change in passage of year of the coefficient of friction of the surface. A coating layer 5 formed of an elastic material such as rubber is formed on an surface of a core material 4 molded of a foamed material such as sponge, and a bonding agent 6 having an elasticity such as denatured silicon is coated on the surface of the coating layer 5 so that ceramic particles 7 are fixed without clearance to provide a paper feed roller 1. Alternatively, the bonding agent 6 is directly coated on the surface of the core material 4 molded of a pliable material such as soft rubber and sponge so that the ceramic particles 7 are fixed without clearance to provide the paper feed roller 9.