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:
Jun. 22, 1999
Filed:
Mar. 11, 1993
Kikuji Kawakami, Miyagi, JP;
Hiroyuki Osaki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic tape guide apparatus which can guide not only a magnetic tape having an applied magnetic layer thereon but also a magnetic thin metal film magnetic tape with a high transport performance is disclosed. The magnetic tape guide apparatus comprises a magnetic tape guide drum or a guide pin having a cylindrical profile for guiding a magnetic tape along a magnetic guide face provided by an outer circumferential face thereof. The magnetic tape guide face is formed as a roughened face wherein the height .delta. of crests is selected within the range of 0.2 .mu.m to 3.0 .mu.m and the pitch x of the crests is selected so that it satisfies 0.050 mm .ltoreq.x.ltoreq.(329.delta.)1/4 mm.