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:
Jan. 09, 1990
Filed:
Jun. 08, 1988
Takatoshi Murakami, Yokohama, JP;
Toshio Kida, Yokohama, JP;
Shiji Kon, Sagamihara, JP;
Toshinobu Asai, Yokohama, JP;
Yoshiyuki Nunome, Kawasaki, JP;
Showa Electric Wire & Cable Co., Ltd., Kanagawa, JP;
Abstract
A method of manufacturing a rubber or plastic-coated roller such as a fixing roller to be used in the thermal fixing part of an electrophotographic copying machine. The method is directed to the production of the rubber or plastic-coated roller by placing a cylindrical mold upright, fitting into the lower part of the cylindrical mold a lower plug provided in the inside thereof with a tapered surface for guiding a core shaft and at the center thereof with a material injection hole, inserting into the cylindrical mold the core shaft having tapered surfaces one each the opposite ends thereof or the core shaft having tapered surface one each at the opposite ends thereof and covered with caps, fitting into the upper part of the cylindrical mold an upper plug provided in the inside thereof with a tapered surface for guiding the core shaft and at the center thereof with an air vent, injecting liquid rubber or plastic under pressure into the cylindrical mold via the material injection hole of the lower plug, and allowing the injected rubber or plastic to set. By this method, there is produced a coated roller the rubber or plastic layer of which is free from eccentricity, and requires no secondary fabrication such as polishing.