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US 4,908,817 AGranted
Cartridge for optical data discs
AssigneeOpticord, Inc.
InventorsPatrick B. Sandell, Albert Ditzig
Life of this patent
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AssigneeOpticord, Inc.
InventorsPatrick B. Sandell, Albert Ditzig
Estimating the term…
An optical data disc is enclosed in a protective cartridge including a pair of interlocking plastic shells. The shells have integral resilient fastening hooks which are locked by plugs to prevent disassembly. A two-piece sliding door is opened for exposing the disc during a read operation. In one embodiment, the sliding door includes two metal shutters having forward portions stamped with resilient hooks which are permanently retained in an undercut groove formed in a plastic slider engaged in a track defined by two plastic shells. The rear portions of the metal shutters are overlapped by respective shutter retainer strips secured to ledges formed in the shells. The door is urged towards a closed position by a double coil torsion spring providing a substantially constant closing force along the range of travel of the slider. A pivot having detent positions is provided for selectible blocking of a write protect hole formed through the shells. An alternative embodiment of sliding door is disclosed which comprises two molded plastic shutters that each have an integrally formed slider which are adapted for innerfitting engagement and for supporting the door for sliding movement relative to the cartridge shells. A locking lever also is disclosed for engaging the disc in response to movement of the door to a closed position for retaining the disc against movement during periods of non-use of the cartridge.
A protective cartridge for a data information disc, comprising a pair of interlocking shells enclosing said disc, a sliding door movable between a closed position for covering said disc and an open position for exposing said disc during a read operation, said shells defining a track along a forward edge portion of said cartridge, said door including a slider mounted for sliding movement in said track and a pair of separate shutters each having a first planar portion overlapping a respective one of the shells and a forward portion, and said shutter forward portions being formed with means for positively engaging said slider.
A protective cartridge for an optical data information disc comprising a pair of interlocking plastic shells enclosing said disc, a sliding door movable between a closed position for covering said disc and an open position for exposing said disc during a read operation, said shells defining a track along a forward edge portion of said cartridge, said door including a slider mounted for sliding movement in said track and a pair of separate sheet metal shutters each having a flat planar portion overlapping an external face of a respective one of the shells, said shutters each having a forward edge portion and a rear edge portion, said forward edge portion of each shutter having means for engaging said slider, and a retaining strip secured to each shell in overlapping relation to the rear edge portion of a respective one of the shutters.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, one of said shells having a pair of integrally formed resilient hooks that are disposed in laterally spaced relation to each other, the other of said shells being formed with an aperture extending through a side thereof which during assembly of said shells receive said hooks and force the hooks together and then allow the hooks to spring apart to lock the shells, and a plug positionable through said aperture from the outside of said other shell, said plug having a first portion for positioning between said resilient hooks after assembly to prevent disassembly and end portion for covering the ends of said hooks received in said aperture.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, said shells being formed with integral interlocking fastening means including a pair of spaced resilient hooks which are forced together during assembly of said cartridge and spring apart to lock the shells together, a plug jammed between said resilient hooks after assembly to prevent disassembly, said plug having a shank portion that is positionable between said resilient hooks and a head at the outer end of said shank portion, and said head being formed with a pair of notches that extent through the head and an undercut recess section communicating with each notch on an underside of said head.
A protective cartridge for a cylindrical data information disc, said cartridge having a pair of interlocking rectangular configured shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, said shells being formed with a write protection hole, a pivot element pivotally mounted between said shells adjacent a corner of said shells for selectively closing said hole, said pivot element being movable between a first position in substantially tangential relation to said disc and a second position in which an end thereof is displaced from said disc, and detent means for selectively maintaining said pivot element in first and second positions.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, a wire torsion spring connected between at least one of said shells and said door for urging said door toward said closed position, and said torsion spring including two cylindrical coils each having an axis and a plurality of turns, and said coil aces being substantially parallel and offset from each other.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, said door including a pair of separate shutters each having a flat planar portion overlapping a respective one of the shells and a forward portion, means for positively connecting said shutter forward portions to form a unitary door structure, and said connecting means including means for supporting said door for sliding movement relative to said shells.
A protective cartridge for a data information disc comprising a pair of interlocking shells enclosing said disc, a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, a locking lever mounted for pivotal movement within said shells, means responsive to movement of said door to said closed position for pivoting said locking lever into engagement with said disc for retaining said disc against movement during periods of non-use of said cartridge, and means responsive to movement of said door to said open position for pivoting said locking lever to a position out of engagement with said disc.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, said door including a pair of separate shutters each having a flat planar portion overlapping a respective one of the shells and an integrally formed forward portion, said shutter forward portions being directly engageable with each other to form a unitary door structure, and means for supporting said door for sliding movement relative to said shells.
A protective cartridge for a data information disc, said cartridge having a pair of interlocking shells enclosing said disc and a sliding door which is movable from a closed position for covering said disc to an open position for exposing said disc during a read operation, said door including a pair of separate shutters each having a flat planar portion overlapping a respective one of the shells and an integrally formed forward portion, means for positively connecting said shutter forward portions to form a unitary door structure, and means for supporting said door for sliding movement relative to said shells.
Dependencies are inferred from the claim text.