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US 4,071,862 AGranted
Disc cartridge
AssigneeNashua Corporation
InventorsFrancis O. Lathrop, Jr., Edward H. Jacobs, William E. Wood, Patrick A. Taylor
Life of this patent
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AssigneeNashua Corporation
InventorsFrancis O. Lathrop, Jr., Edward H. Jacobs, William E. Wood, Patrick A. Taylor
Estimating the term…
Disclosed is a magnetic disc cartridge of the type in which a magnetic disc assembly is supported for rotation within cartridge covers. Various improvements in the disc cartridge facilitate the manufacture and use thereof. For example, the cartridge inside cover is permanently secured to the cartridge top cover by a series of integral hooks on the inside cover and mating hook anchors on the top cover; a simplified release lever serves to draw the magnetic disc assembly away from the bottom cover when removal of the bottom cover from the remainder of the cartridge is desired; an improved snubber assembly is provided for inhibiting rotation of the disc assembly when the release lever is actuated; and an improved design of the hub which forms a part of the magnetic disc assembly permits the distortion-free operation of the hub, even when made from a synthetic plastic material.
In a disc cartridge for a magnetic disc, the cartridge comprising
In a disc cartridge comprising a magnetic disc assembly supported within cartridge covers, said magnetic disc assembly comprising a magnetic disc having a circular central opening and a hub to which said disc is secured, the improvement wherein said hub comprises a unitary molded non-metallic plate having an annular disc-engaging surface with an inner diameter substantially equal to the diameter of said disc's central opening and a second annular surface radially inward of said disc-engaging surface and offset therefrom by a distance substantially equal to the thickness of the magnetic disc adjacent its central opening, said hub including a plurality of holes therethrough in said second annular surface;
In a disc cartridge comprising a magnetic disc assembly supported within secured-together top and inside covers, a bottom cover magnetically secured to said magnetic disc assembly, and a release lever for incrementally moving said magnetic disc assembly relative to said bottom cover to break the magnetic attraction therebetween, the improvement wherein said release lever is mounted in a well in the exterior surface of said top cover and includes a gripping portion and a pair of parallel legs each integral with and cantilevered from, said gripping portion, each said leg having a camming surface for engagement with a bearing surface in said well, and a pin projecting from the plane of the leg, each said pin being received in a loose fit in a mating receptacle of said magnetic disc assembly, said camming surfaces shaped with respect to said pins such that a predetermined rotation of said lever, from a first to a second position, moves said pins in a direction away from said bearing surface, whereby said magnetic disc assembly is moved away from said bottom cover.
In a circular disc cartridge having an axis and comprising a magnetic disc assembly supported within cartridge covers, said magnetic disc assembly movable between first and second positions along said axis relative to said covers, said magnetic disc assembly being rotatable with respect to said covers in said first position but engaging a rotation-inhibiting snubber assembly when in said second position, the improvement where said snubber assembly comprises
Dependencies are inferred from the claim text.