Watanabe, Toshio; Mori, Hidenori;

Disc cartridge

A disc cartridge which is capable of effectively preventing undesirable and deteriorating recording and playback characteristics of an optical disc accommodated and retained therein due to the effects of dust particles and other foreign materials being adhered to the surfaces of the optical disc. In accordance therewith, shock relieving or sealing members close a gap between the shutter and the case of the disc cartridge to prevent dust particles and other foreign materials from intruding onto the surfaces of the optical disc. In addition, sheet-like members are provided in this disc cartridge for cleaning the surfaces of the optical disc.

• Iodinated vasopressin antagonists Butterfly valve
• Paint spray booth Closing cap for two-chamber containers
• Halftone image scaling Network terminal driver communications subsystem
• Variable flow valve Electro optic switch
• Chloramphenicol derivatives antigens and antibodies Linerless bottle cap
• Combination fuze for missiles Idler roll bearing assembly
• Gasket seal Disc changer with improved operability
• War games land mine Anti-human ceruloplasmin monoclonal antibody
• Ankle prosthesis with angle adjustment Overheat protection for fluid pump
• Detergent tablet Multi-capillary electrophoresis apparatus
• Flush fitting protective strip assembly Magnetic water conditioner
• Photoconductor belt seam detection Mounting bracket
• Parameter value communication system Camera with touch sensitive switch
• Door extension for vehicle doors Nonmagnetic one-component developing method
• Collapsible cabinet Waste water treatment
• Cyclic glycerophosphates and analogs thereof Ozonizer feeding device
• Method of fabricating semiconductor devices Signal analyzing system
• Adjusting mechanism Inverter
• Clip-on glasses Reusable wall fastener
• Hybrid nudger roll Tub grinder control
• Fluid dispenser with fill adapter 2,4-Dichlorophenoxyacetyl thiolcarbamate hydrazines
• Method for fabricating semiconductor device Fishing rod
• Roasting appliance Vaginal device
• All gauge skeet set barrel Governor stabilizer
• Silicon diaphragm capacitive pressure transducer Crane swing safety control
• Garment hanger Lighting fixture
• Excessive pronation correcting device Suction-cup release mechanism

What is claimed is:

1. A disc cartridge for accommodating and retaining an optical disc having data recorded onto and reproduced therefrom by irradiation of a laser beam wherein said optical disc can be rotated in said disc cartridge but cannot be easily removed from said disc cartridge, said disc cartridge comprising:

an opening extending in a radial direction of said optical disc to a periphery thereof;

a shutter for closing and exposing said opening when the shutter is respectively moved between first and second positions; and

a sealing member located at partly around the periphery of said opening without engaging said shutter and closing a gap between said shutter and the periphery of said opening for preventing and/or reducing foreign material from entering said opening and being adhered to said optical disc, and

wherein said laser beam can be irradiated upon said optical disc through said exposed opening by sliding said shutter to its said second position.

2. The disc cartridge of claim 1 wherein said sealing member is an elastic member positioned on a surface of a housing of said disc cartridge surrounding said opening.

3. The disc cartridge of claim 1 wherein said sealing member is made of felt positioned on a surface of a housing of said disc cartridge surrounding said opening.