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:
Dec. 01, 1998
Filed:
Nov. 19, 1996
Vacuumschmelze GmbH, Hanau, DE;
Abstract
In the manufacture of magnetic data carriers, such for example, hard-disk storages, it must be assured that neither the data carrier itself nor component parts of the data carrier system situated in the proximity has magnetic contaminants. An improved measuring method allows the determination of the magnetic contaminants which were attached to an adhesive tape applied to the surface being examined. The improvement is that a magnetized soft-magnetic measuring substrate has a surface provided with a parting agent which is then brought into contact with the magnetic contaminants adhering to the adhesive tape. A reduction of the remanent field that is produced by this contact represents a criterion for the magnetic contamination of the surface under examination.