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. 02, 1988
Filed:
Jul. 01, 1986
Johannes C Muller, Eindhoven, NL;
Cornelis M Beijersbergen Van Henegouwen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A helical scan head drum assembly includes upper and lower drums having an aligned guide surface. The upper and lower drums can be easily separated from each other to install or replace a head support between the drums, and reassembled without loss of alignment of the circumferential guide surface. Each drum has three positioning elements formed in a wall portion, arranged such that the positioning elements of the two drums engage each other pairwise to form a statically defined alignment of the two drums. The fixing element presses the two drums together at the location of the positioning elements to fix them in place.