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. 04, 1985
Filed:
Oct. 17, 1983
Applicant:
Inventors:
James J Wulfing, Afton, MN (US);
Robert M Rood, Woodbury, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
B65H / ; G03B / ; G11B / ;
U.S. Cl.
CPC ...
242 718 ; 242199 ;
Abstract
Videocassette tape spool, the wear button of which is a protuberance of a small plastic piece which may serve to lock the parts of the spool together. By using a small piece for the wear button, substantial savings in raw material can be realized since highly wear-resistant plastics tend to be quite expensive. The novel tape spool also can be assembled less expensively compared to tape spools now used in videocassettes.