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:
Jul. 21, 1992
Filed:
Dec. 03, 1990
John A Heveron, Champlin, MN (US);
Vincent P Teuber, Hastings, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An erasure preventing button for preventing recording on a magnetic tape cassette slides within a cavity in a side wall of the cassette between a released position and a depressed position. The erasure preventing button includes a base, which interacts with the tape recorder when the button is released, and a front wall. The front wall includes an arm with a shoulder which is biased toward an opening formed in the side wall of the cavity. The shoulder extends into the opening when the erasure preventing button is released and includes a planar inclined surface which frictionally engages one corner of the opening to prevent the button from sliding from the released position to the depressed position. A rear arm extending from the base prevents the erasure preventing button from being removed from the cavity.