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:
Jan. 15, 1991
Filed:
Oct. 05, 1988
Applicant:
Inventor:
Hajime Doi, Ibaraki, JP;
Assignee:
Hitachi Maxell, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360133 ;
Abstract
A disk cartridge which comprises a cartridge case receiving a magnetic disk and a cleaning sheet fixed by spot or line welding to the inner surfaces of the cartridge case such as to contact both sides of the magnetic disk; the density of the welding spots or lines is reduced or eliminated in the regions of the cleaning sheet which undergo the most pressure exerted by pressing pads on the recording/reproducing apparatus for the disk cartridge.