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:
Nov. 22, 1988
Filed:
Dec. 05, 1986
Steven R Seeman, Moundsview, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A method and apparatus for magnetically detecting the edge of a magnetic recording tape to enable accurate positioning of a tranversely movable recording/playback unit at any of a plurality of track locations across the width of the tape. The gain of a playback amplifier is first dynamically adjusted in response to a played back periodic test signal based on the number of flux transitions detected during playback of a given length of tape, and an edge of tape reference position thereafter establishing by comparing the number of flux transitions detected during the playback of a periodic test signal recorded along the edge of a given length of tape when the recording/playback unit is successively stepped toward the edge of the tape.