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:
Aug. 10, 1993
Filed:
Apr. 04, 1991
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360132 ; 360137 ; 242199 ;
Abstract
A tape cassette has a magnetic tape wound and housed in a casing, the magnetic tape having a magnetic recording layer in the form of a ferromagnetic thin metal film. The tape cassette has a trap layer disposed near a portion of the magnetic tape. The trap layer is made of a resin having at least an amino group or an amide group. Even when the tape cassette is used in harsh environments in the presence of corrosive gases, the trap layer adsorps corrosive gases which have entered the tape cassette, thereby protecting the magnetic tape against deterioration.