System for stamping an optical storage disk
January 11, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3258324 3660002 3761220 Process for producing a stamper for videodisc purposes Method of manufacturing a plastic record carrier having a stratified structure Method for manufacturing optical memory disc Optically readable information disk and method of manufacturing same Method for applying material to a substrate High track density magnetic media with pitted optical servo tracks and method for stamping the tracks on the media Method and apparatus for parallel alignment of opposing mold surfaces by controlling the thermal expansion of the apparatus Patent #: 5125945 InventorsApplicationNo. 180183 filed on 01/11/1994US Classes:65/305, PRESS MOLDING MACHINE65/318, With means varying plunger pressure during pressing65/319, With means for heating or cooling apparatus65/356, Internally positioned65/374.12, Metallic65/374.13, Ceramic material65/374.15, Elemental carbon containing (e.g., graphite, charcoal, etc.)100/211, WITH FLEXIBLE OR DEFORMABLE PRESSURE SURFACE425/389, By fluid pressure actuated flexible diaphragm425/406, PRESS FORMING APPARATUS HAVING OPPOSED PRESS MEMBERS425/437By differential gas pressure ejecting meansExaminersPrimary: Jones, W. GaryAssistant: Griffin, Steven P. Attorney, Agent or FirmForeign Patent References
International ClassesC03B 011/00C03B 011/06 Foreign Application Priority Data1987-06-09 DEAbstractAn optical storage disk consists of a glass substrate (1) into which guide tracks (3) for servo-controlling the focussed light beams are directly stamped by a hot stamp process. After stamping, the glass substrate is thermally quenched in the stamping device to increase its breaking resistance through thermal curing. In order to achieve uniform guide tracks over the entire surface of an optical storage disk, flexible stamp stencils (35) in a flexible holder (34) are used whose curvature can be changed by applying hydro-static pressure. Suitable stamp stencils consist of monocristalline silicon disks with surface hardening, or of metal disks, structured in photolithographic processes. The stamp lands are made with bevelled edges to facilitate the separating of stamp and glass substrate after cooling.Other References
Field of SearchPRESS MOLDING MACHINEWith means for heating or cooling apparatus With means varying plunger pressure during pressing MEANS HEATING OR COOLING APPARATUS Internally positioned PREFORM RESHAPING MEANS WITH TREATING MEANS Metallic Ceramic material Elemental carbon containing (e.g., graphite, charcoal, etc.) Optical track structure (e.g., phase or diffracting structure, etc.) Specific disc profile Flexible Specified material Layered (e.g., permanent protective layer) Pit/bubble/groove structure specifies By fluid pressure actuated flexible diaphragm Vacuum or suction means Including shaping means comprising fluid pressure contacting work directly By differential gas pressure ejecting means MEANS TO CREATE A VACUUM OR APPLY FLUID PRESSURE WITHIN A PRESS FORMING MOLD Isostatic type PRESS FORMING APPARATUS HAVING OPPOSED PRESS MEMBERS Pressure applying member mounted for arcuate motion Opposed press shaping members insertable between opposed pressure applying means WITH FLEXIBLE OR DEFORMABLE PRESSURE SURFACE Circumferentially tightened loop Fluid actuated or controlled print means | |
