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:
Apr. 26, 1977
Filed:
Jun. 30, 1975
Applicant:
Inventors:
Michael Conan Barrett, Austin, TX (US);
Eric Sigfried Petterson, Austin, TX (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ;
U.S. Cl.
CPC ...
360137 ; 1161 / ; 1161 / ; 360106 ; 360132 ;
Abstract
A magnetic tape cartridge includes a housing for supporting the tape for movement therein and for enclosing a portion of the tape. The tape is expandable from a particular reference point along its width by virtue of temperature and humidity changes. A track position indicator attached to the cartridge includes indicia thereon relative to track positions along the width of the tape. The indicator has a coefficient of expansion closely similar to the coefficient of expansion of the tape, and in the preferred embodiment is made of the same material as the magnetic tape substrate material.