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:
Feb. 12, 1985
Filed:
Feb. 08, 1982
Applicant:
Inventors:
Richard T Purdy, Inglewood, CA (US);
Alden H Packard, Glendora, CA (US);
Assignee:
Perfect Data Corporation, Chatsworth, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G11B / ; G11B / ;
U.S. Cl.
CPC ...
360128 ; 360 99 ; 360133 ; 360137 ;
Abstract
A cleaning disk made of a thin fibrous material is provided with an opaque ring so that the cleaning disk will look like magnetic media to the sensors of a flexible disk system. The opaque ring may be in the form of a separate plastic ring which is bonded to the cleaning disk and extends to the center opening of the disk. Such a structure provides the requisite opaque area as well as providing reinforcement to the central area of the cleaning disk.