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JPS56127942A |
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JPS56127946A |
PURPOSE: To obtain a disk-type recording medium that can transfer the information signal of a stamper in a high workability and high fidelity, by forming a layer (to be formed on a transparent supporter) having an information pit via the...
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JPS56127940A |
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JPS5634448B2 |
A device for pressing storage substrates made of thermoplastic material. It comprises: a press having two plates, a matrix attached to one of the plates, the matrix carrying the data to be stored in said substrate, and, arranged between ...
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JPS5698141A |
A method for manufacturing modulated disc records (i.e. video or audio records) including bonding a plastics material foil to the unmodulated face of a stamper plate before the stamper plate is secured between the rams of the record pres...
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JPS5633779B2 |
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JPS5686721A |
PURPOSE: To prepare a thin type high density information recording disk such as a video disk with a high speed by a method wherein while a PVC sheet is moved from the upper to the lower continuously, a heating, a pressure molding, a cool...
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JPS5683854A |
Video discs are cleaned with a water-based solution to remove water soluble salts from the surface of the discs, thereby reducing the moisture sensitivity of the discs.
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JPS5682724U |
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JPS5675830A |
PURPOSE: To manufacture a record disc of high tone quality and with pictures by preparing surface material layers of heat-gelatinized (semi)transparent thermoplastic resin on both sides of a printed paper on both surfaces of which is app...
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JPS5672332U |
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JPS5669126A |
PURPOSE: To manufacture an illustrated record disc with sound grooves having precise shape and the superior tone quality by a method wherein the press molding is performed by inserting a surface member, a metallic plate and another surfa...
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JPS5668903A |
PURPOSE: To improve visual recognition and operation by displaying the recorded contents of a record disk by characters, formed by roughening the surface, as a substitute for a label. CONSTITUTION: Mirror-surface part 2, where no signal ...
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JPS5662983A |
PURPOSE:To produce an original disc for recording of superior cutting characteristic and signal-to-noise ratio by using the compound shown by specific general formula as a copper sulfate plating additive and electroforming under specific...
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JPS5658145A |
PURPOSE: To obtain an information recording carrier, by forming the N type photoresist to the P type photoresist to which the information is recorded by exposure, applying the metal plating at the area where the P type photoresist is rem...
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JPS5657838A |
PURPOSE: To eliminate the plate-out phenomenon and improve the operating efficiency of the stamper press process to the utmost, by adding a partial ester of a polybasic acid to an information memory material without causing another noise...
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JPS5651031A |
An apparatus for making video discs by moulding from an engraved master which includes depositing on one edge of the master an elongated fillet of a curable resin; photopolymerizable or thermosettable and spreading gradually the resin be...
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JPS5641506A |
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JPS5637836A |
PURPOSE: To make it possible to transcribe a signal surface in a short time and with high precision by setting a replica material, which contains resin setting by ultraviolet rays, electron beams, etc., in contact with an original disk o...
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JPS5634430A |
Video disc nickel stampers are coated with a very thin, e.g., 100-250 angstroms, non-grainy layer of chromium which imparts increased scratch resistance to carbon-filled polyvinylchloride resins during compression molding.
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JPS5614371B2 |
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JPS5614069B2 |
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JPS5624223U |
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JPS564961B2 |
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JPS561213B2 |
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JPS55160338A |
The invention relates to an optically readable information disk, a method of manufacturing same, as well as a device for carrying out the method, in which the information disk which comprises an optically readable information track of in...
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JPS5546298B2 |
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JPS55148131A |
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JPS55144129A |
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JPS5543911B2 |
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JPS5543175B2 |
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JPS5538246B1 |
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JPS5530978B2 |
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JPS5597006A |
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JPS5594796A |
A device for making discs, comprising a press which includes at least one hydraulic pressure chamber, one wall of which is formed during operation by a flexible, thermally conductive plate which can be pressed against a thermoplastic sub...
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JPS5520848B1 |
1299951 Moulding gramophone records RCA CORPORATION 13 Feb 1970 [25 Feb 1969] 7001/70 Heading B5A Automatically operated apparatus for the production of gramophone records includes a moulding press with platens 36, 38 to which a measured...
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JPS5532298A |
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JPS557604B2 |
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JPS5518461A |
PURPOSE: The surface of record discs made of vinyl chloride resin is treated with low temperature plasma of a gas free from plasma polymerization, thus readily increasing the surface strength of record discs and preventing the noise. CON...
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JPS552094A |
Half-mould esp. for mfr. of gramophone record discs has a cooling and/or heating duct system evenly distributed beneath the pressing surface of the half-mould and fitted with an inelt and an outlet collecting chamber. The duct system is ...
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JPS54161901A |
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JPS54139702A |
PURPOSE: To enable reproduction to be stably perormed by recording imformation signals as geometrical shape changes and depositing a transparent sheet on the outside of the information recording region as the recording protection face of...
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JPS54106201A |
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JPS54100703A |
PURPOSE: To make it possible to mass-produce records, which are recorded with information in their roughnesses, by using a record pressing mold, which carries an original disc and a cutting blade, for film of thermoplastic resin, which i...
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JPS5489701A |
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JPS5414922B2 |
A method of producing a high resolution information storage disc includes the steps of forming a grooved disc coated with an electron beam sensitive material, exposing the coated disc to a signal modulated electron beam, replicating the ...
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JPS5423501A |
The process according to the invention uses a matrix engraved by any means, the tracks being perfectly centered on this matrix in relation to a center of rotation. The matrix is placed in a vacuum chamber on a supporting axis capable of ...
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JPS5414503U |
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JPS5412703A |
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JPS549603A |
A matrix is used to prepare a mold of an elastomeric material. A polymerizable compound is coated onto a flexible, thin substrate such as Mylar and is placed with compound side in intimate contact with the mold. The compound is cured and...
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