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. 06, 1990
Filed:
Jul. 28, 1988
John B Morse, Boston, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A disk cartridge, operable with a disk drive, includes a generally flat-shaped case enclosing a recording medium disposed on a disk about a central hub. The case includes top and bottom walls disposed on opposite sides of the disk, the bottom wall having an access opening through which a disk drive is to engage with the hub. A foil spring has a generally flared dish shape, and is symmetrically formed and positioned about a central axis of the hub. The spring is positioned between the disk and the top wall for urging the disk toward the bottom wall to close the access opening with the hub and to close a spindle receiving aperture in the hub to prevent entry of contaminants during periods of nonuse.