Disk adapter for disk cartridge

Claim 2

A disk adaptor for a disk cartridge comprising a rigid plate-like member, wherein said rigid plate-like member includes: an opening at approximately the center thereof for rotatably accommodating a disk-shaped recording medium therein; a plurality of recesses adjacent to and communicating with said opening for use in removing the disk-shaped recording medium from said adapter; said plate-like member having one end substantially rounded and the other end having at least two corner projections integrally formed with said plate-like member for positioning and retaining the disk adapter in a disk housing section of the disk cartridge by placing said corner projections into complementary corner recesses formed as part of the disk housing section; and at least one locating lug protruding from the outer periphery of the adapter proximate said two corner projections for engaging a complimentary slot formed in the disk housing section of the disk cartridge for locating the adapter upon placement into the disk cartridge.

Claim 3

The disk adapter according to claim 1 wherein the disk adapter has a size to fit in the disk housing section of the disk cartridge and a thickness approximately equal to the height of the disk housing section of the disk cartridge.

Claim 4

The disk adapter according to claim 2, wherein the disk cartridge includes a centrally arranged window and said disk adapter further comprises a step formed on the disk adapter as an area of reduced thickness for alignment along the window of the disk cartridge such that a clearance is provided adjacent the window.

Claim 5

A disk adapter for a disk cartridge comprising a rigid plate-like member having a front end facing a reproducing/recording head and a rear end opposite from the front end, wherein said rigid plate-like member includes: an opening at approximately the center thereof for rotatably accommodating a disk-shaped recording medium therein; two recesses adjacent to and communicating with said opening located on opposite sides midway between the front and rear ends of said adapter for use in removing the disk-shaped recording medium from said adapter; said plate-like member having the rear end substantially rounded and the front end having at least two corner projections integrally formed on the front end of said plate-like member for positioning and retaining the disk adapter in a disk housing section of the disk cartridge by placing said corner projections into complementary corner recesses formed as part of the disk housing section; and at least one locating lug protruding from the front end of the adapter proximate said two corner projections for engaging a complementary slot formed in the disk housing section of the disk cartridge for locating the adapter upon placement into the disk cartridge.

Claim 6

A disk adapter for a disk cartridge comprising a rigid plate-like member having a front end facing a reproducing/recording head and a rear end opposite from the front end, wherein said rigid plate-like member includes: an opening at approximately the center thereof for rotatably accommodating a disk-shaped recording medium therein; two recesses adjacent to and communicating with said opening located on opposite sides midway between the front and rear ends of said adapter for use in removing the disk-shaped recording medium from said adapter; said plate-like member having the rear end substantially rounded and the front end having at least two corner projections integrally formed on the front end of said plate-like member for positioning and retaining the disk adapter in a disk housing section of the disk cartridge by placing said corner projections into complementary corner recesses formed as part of the disk housing section; and at least one locating lug protruding from the front end of the adapter proximate said two corner projections for engaging a complementary slot formed in the disk housing section of the disk cartridge for locating the adapter upon placement into the disk cartridge.