Magnetic record disk cover

Claim 2

In a magnetic recording system, the combination comprising: a rotary magnetic record disk; and a cover for containing said disk, having the inner surfaces thereof in physical and frictional contact with the adjacent record surfaces of said disk, said inner surfaces being a solid, porous, antistatic cleaning material, said cover having a transducing aperture to expose a portion of said rotary magnetic record disk, said disk being rotatable while said cover is maintained stationary in the magnetic recording system, whereby said solid, porous material cleans contaminants from said record disk during rotation of said record disk.

Claim 3

The combination set forth in claim 1, further comprising means coupled to said disk for rotating said disk.

Claim 4

The combination set forth in claim 1, wherein the outer perimeter of said cover is sealed therearound thereby to enclose said disk nonremovably therefrom.

Claim 5

The combination set forth in claim 1, wherein said magnetic record disk includes a plurality of sector-marking apertures equally spaced circumferentially around said disk and at the same radial distance from the center of said disk, and wherein said cover includes a reference aperture disposed so that said apertures of said disk will be aligned therewith upon rotation of said disk.

Claim 6

The combination set forth in claim 1, wherein said cover comprises a pair of sheets, each sheet of said pair including an outer protective layer and an inner layer, said inner layer including said inner surface, and wherein said magnetic record disk has an opening centrally disposed therethrough, and wherein at least one of said pair of sheets has said transducing aperture therethrough disposed radially between said central opening in said magnetic disk and an outer edge of the sheet.

Claim 7

In a magnetic recording system having a rotary drive and a magnetic transducer, the combination comprising: a magnetic record disk having an opening centrally disposed therethrough for coupling the rotary drive thereto to enable said disk to be rotated by the rotary drive; a cover containing said record disk and having on its inner surface a solid, porous, antistatic low-friction cleaning material, said inner surface being in contact with the record surface of said record disk, said cover having a transducing aperture disposed radially between said central opening in said magnetic disk and an outer edge of said cover, thereby to expose a portion of said disk record surface for contact with the magnetic transducer, so that rotation of said record disk causes the inner surfaces of said cover to continuously clean the record surfaces of said record disk.

Claim 8

In a magnetic recording system having a rotary drive and a magnetic transducer, the combination comprising: a magnetic record disk having an opening centrally disposed therethrough for coupling the rotary drive thereto to enable said disk to be rotated by the rotary drive; a cover containing said record disk and having on its inner surface a solid, porous, antistatic low-friction cleaning material, said inner surface being in contact with the record surface of said record disk, said cover having a transducing aperture disposed radially between said central opening in said magnetic disk and an outer edge of said cover, thereby to expose a portion of said disk record surface for contact with the magnetic transducer, so that rotation of said record disk causes the inner surfaces of said cover to continuously clean the record surfaces of said record disk.

Claim 9

In a magnetic recording system as in claim 6, wherein said magnetic record disk includes a plurality of sector-marking apertures equally spaced circumferentially around said disk and at the same radial distance from the center of said disk, and wherein said cover includes a reference aperture disposed so that said apertures of said disk will be aligned therewith upon rotation of said disk.