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:
Oct. 16, 1990
Filed:
Jan. 30, 1989
Budiman Sastra, Eindhoven, NL;
Jacob G Fijnvandraat, Eindhoven, NL;
Leonardus H Maaswinkel, Eindhoven, NL;
Everhardus A Muijderman, Geldrop, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A rotatable magnetic-head unit comprises a cylindrical drum with at least one magnetic head for recording and/or reproducing signals on/from a magnetic tape. This magnetic tape is wrapped around a part of the circumference of the drum and is moved past that part of the drum circumference. in order to obtain a stable bearing arrangement for the magnetic-head unit the magnetic head is fixedly connected to the drum, whose wall is supported by means of spiral-groove bearings in the direct proximity of the magnetic heads in a stationary cylindrical housing. The drum can rotate inside the housing. The housing is formed with an opening in which the magnetic tape moves.