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:
Feb. 27, 1990
Filed:
Oct. 17, 1988
Mamoru Usami, Tokyo, JP;
Yoshitaka Kawamura, Owariasahi, JP;
Sanwa Needle Bearing Co., Ltd., Aichi, JP;
Asahi Seiki Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing a tape guide cylinder of small thickness from metal sheet by combination of drawing processing technique, flange processing technique, piercing technique, trimming technique, curling technique and optionally burring technique of metal working processing is disclosed. The tape guide cylinder produced has flange-like inward portions or inwardly bent portions at both ends of the cylinder which fit on cylinder attaching shaft of a cassette case, respectively. Therefore, the inward portions or inwardly bent portions contribute the reduction of the thickness of the cylinder body and thus the reduction of the material used for the production of a tape guide cylinder.