Thermoformed cartridge for a magnetic record disc

Claim 2

A cartridge for containing a flexible, rotary, magnetic record memory disc comprising a substantially rigid first cover having an interior flat surface and a second cover which is substantially thinner than the first cover and which is deformed to provide a recess coextensive with the circumferential edge of the memory disc, the second cover having an interior surface which is bonded to the flat inTerior surface of the first cover along a path immediately adjacent to and exterior of the recess in the second cover to provide a circumferentially sealed cavity for housing the memory disc, the junction of the interior surface of the first and second covers lying entirely in a plane which is parallel to and spaced from the memory disc''s plane of rotation.

Claim 3

A cartridge for containing a flexible, rotary memory disc as recited in claim 1 wherein the interior surfaces of the first and second covers are separated from the memory disc by a pair of anti-friction, anti-static wiper layers, the diameter of the wiper layer adjacent to the first cover being such that its outer circumferential edge abuts the junction of the first and second covers to prevent the outer peripheral edge of the memory disc from engaging with the junction.

Claim 4

A cartridge for containing a flexible, rotary memory disc as recited in claim 2 wherein the wiper layers are made of a synthetic, non-woven fibrous material.

Claim 5

A cartridge for containing a flexible, rotary memory disc as recited in claim 1 wherein the first and second covers are made of a high impact plastic material.

Claim 6

A cartridge for containing a flexible, rotary memory disc as recited in claim 4 wherein the first cover is at least four times as thick as the second cover.

Claim 7

A cartridge for containing a flexible, rotary memory disc as recited in claim 4 wherein the second cover is heat formed to provide the recess which accommodates the memory disc.

Claim 8

In a magnetic recording system, the combination comprising: a flexible, rotary magnetic record disc; and a cartridge for containing the disc including a first cover having an interior flat surface and a second cover which is substantially thinner than the first cover and which is deformed to provide a recess coextensive with the circumferential edge of the memory disc, the second cover having an interior surface which is bonded to the flat interior surface of the first cover along a path immediately adjacent to and exterior of the recess in the second cover to provide a circumferentially sealed cavity for housing the memory disc, the junction of the interior surface of the first and second covers lying entirely in a plane which is parallel to and spaced from the memory disc''s plane of rotation; the disc being rotatable while the cartridge is stationary in the magnetic recording system.

Claim 9

In a magnetic recording system, the combination comprising: a flexible, rotary magnetic record disc; and a cartridge for containing the disc including a first cover having an interior flat surface and a second cover which is substantially thinner than the first cover and which is deformed to provide a recess coextensive with the circumferential edge of the memory disc, the second cover having an interior surface which is bonded to the flat interior surface of the first cover along a path immediately adjacent to and exterior of the recess in the second cover to provide a circumferentially sealed cavity for housing the memory disc, the junction of the interior surface of the first and second covers lying entirely in a plane which is parallel to and spaced from the memory disc''s plane of rotation; the disc being rotatable while the cartridge is stationary in the magnetic recording system.