Disk jacket

Claim 2

A disk jacket for receiving a photo disk which is rotated by a spindle, and which records, reproduces and erases information stored thereon by means of an optical head, the disk jacket comprising: a pair of disk jacket section disposed in opposed facing relation from each other for receiving therebetween a photo disk; and means defining a single opening in at least one of the jacket sections and extending along a radius of the photo disk, the single opening being configured to receive a spindle therein to rotatably support the photo disk and to receive the optical head therein so as to enable movement of the optical head along the radius of the photo disk from the radially outermost end thereof to the radially innermost portion thereof.

Claim 3

A disk jacket for receiving a disk-like medium which records, reproduces and erases information on tracks thereof by means of a head, the disk jacket comprising: a pair of disk jacket sections disposed in opposed facing relation from each other for receiving therebetween a disk-like medium; and means defining an opening in at least one of the disk jacket sections and extending in a radial direction with respect to the disk-like medium, the opening having a central portion disposed in the vicinity of the center of the one disk jacket section and configured to receive therein a spindle for rotatably supporting the disk-line medium, and a radial portion contiguous with the central portion and extending outwardly therefrom in the radial direction and configured to receive therein the head to thereby enable the head to undergo movement in the radial direction between the radial innermost and outermost tracks of the disk-like medium.

Claim 4

A disk jacket for receiving a disk-like medium which records, reproduces and erases information on tracks thereof by means of a head, the disk jacket comprising: a pair of disk jacket sections disposed in opposed facing relation from each other for receiving therebetween a disk-like medium; and means defining an opening in at least one of the disk jacket sections and extending in a radial direction with respect to the disk-like medium, the opening having a central portion disposed in the vicinity of the center of the one disk jacket section and configured to receive therein a spindle for rotatably supporting the disk-line medium, and a radial portion contiguous with the central portion and extending outwardly therefrom in the radial direction and configured to receive therein the head to thereby enable the head to undergo movement in the radial direction between the radial innermost and outermost tracks of the disk-like medium.

Claim 5

A disk jacket according to claim 2; wherein the radial portion of the opening is dimensioned to receive a head of a photo disk apparatus.

Claim 6

A disk jacket according to claim 2; wherein the radial portion of the opening is dimensioned to receive a head of a photo-magnetic disk apparatus.

Claim 7

A disk jacket for receiving a disk-like medium which records, reproduces and erases information stored thereon by means of a head, the disk jacket comprising: a pair of generally rectangular disk jacket sections disposed in opposed facing relation from each other for receiving therebetween a disk-like medium; means defining a single opening in at least one of the generally rectangular jacket sections and extending along a center line of the one rectangular jacket section parallel to a side line thereof, the single opening being configured to receive the head therein so as to enable movement of the head along a radius of the disk-like medium; and a pair of shutter blades disposed between the pair of generally rectangular jacket sections and pivotably supported at opposite corners thereof relative to the center line for cooperatively opening and closing the single opening.

Claim 8

A disk jacket for receiving a disk-like medium which records, reproduces and erases information stored thereon by means of a head, the disk jacket comprising: a pair of generally rectangular disk jacket sections disposed in opposed facing relation from each other for receiving therebetween a disk-like medium; means defining a single opening in at least one of the generally rectangular jacket sections and extending along a center line of the one rectangular jacket section parallel to a side line thereof, the single opening being configured to receive the head therein so as to enable movement of the head along a radius of the disk-like medium; and a pair of shutter blades disposed between the pair of generally rectangular jacket sections and pivotably supported at opposite corners thereof relative to the center line for cooperatively opening and closing the single opening.

Claim 9

A disk jacket according to claim 5; including a pair of springs each engaged between the jacket sections and one of the shutter blades for urging the shutter blades to close the single opening; and opening means connected to each of the shutter blades for moving each of the shutter blades to an opposite side with respect to the center line so as to open the single opening.

Claim 10

A disk jacket according to claim 5; in which each of the shutter blades comprises a boomerang-shaped bent plate.

Claim 11

A disk jacket according to claim 5; in which the single opening is configured to receive a spindle therein to contact with and rotatably support the disk-like medium.

Claim 12

A disk jacket according to claim 5; wherein each of the jacket sections has a single opening therein.

Claim 13

A disk jacket according to claim 9; in which each of the pair of shutter blades comprises a set of double blades for coincidently closing both of the single openings.

Claim 14

A disk jacket according to claim 7; including a disk retainer for retaining the disk-like medium when the shutter blades close the single opening.

Claim 15

A disk jacket according to claim 6; wherein the opening means includes means operable in response to inserting and removing movements of the disk jacket relative to an information recording and reproducing apparatus for effecting opening of the shutter blades.