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:
Mar. 30, 1993
Filed:
Mar. 20, 1991
Applicant:
Inventors:
Bernd Scholtysik, Munich, DE;
Jose Toral, Munich, DE;
Hermann Brandstetter, Munich, DE;
Manfred Baumann, Munich, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, US;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
361149 ; 307101 ;
Abstract
The invention relates to a demagnetizing device for magnetic recording media, so-called pancakes, wound up in the form of a tape, which device consists of a cylindrical coil (1), the field distribution (3) of which extends essentially parallel to the winding plane (2) of the recording medium (4), while the pancakes (4) can be inserted into the coil (1) in the axial direction by a lifting device (5). The compact form enables an entire pancake stack to be demagnetized at the same time (FIGURE).