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JPS598220B2 |
1526197 Trimming disc records EMI Ltd 15 Sept 1975 [3 Oct 1974] 42897/74 Heading B5A In a disc record producing apparatus an extruder produces a shot of material at a first station, the shot is pressed to form a disc record with attached...
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JPS5933644A |
PURPOSE: To form guide pits with high accuracy of dimension, by providing a signal information producing layer on a substrate and then a tracking guide forming layer of a different material from the signal information producing layer on ...
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JPS5933645A |
PURPOSE: To produce easily and with high accuracy a master disk for an optical disk, etc., by providing a substrate serving as a recessed/projected part forming layer to form a tracking guide to the substrate and forming information sign...
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JPS5928257A |
PURPOSE: To form the center hole of a disk master with high accuracy and at the same time to prevent the generation of warps and fins to the master, by using the center hole of a glass disk as a guide to form the center hole of the maste...
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JPS5928258A |
PURPOSE: To avoid the generation of warps or fins to a disk master when the master is separated from a glass disk, by forming the center hole of the disk master with an etching process after a photoresist layer is removed by means of a c...
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JPS5924631A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS5920439U |
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JPS5922727A |
PURPOSE: To obtain the high quality duplicating matrix with long service life and no generation of deformation by a structure wherein a rib part to fit to a metal mold and a hole for mounting to and dismounting from the metal mold are pr...
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JPS595411B2 |
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JPS593869Y2 |
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JPS5920627A |
PURPOSE: To obtain an information recorded disk having an uneven surface molded in excellent transferability and improved picture and sound qualities by performing compression molding of an information recorded medium in unrecorded dies,...
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JPS5916155A |
PURPOSE: To facilitate peeling from a stamper after manufacturing a disc to prevent a warp or the like deformation, and to enable its use in any environment whatever, from the view point of production, by using a transparent plate made o...
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JPS5916152A |
PURPOSE: To prevent a warp or the like deformation of a disc, and to enable its use in any environment, by laminating a thermoplastic resin layer made of a copolymer of α-methylstyrene and methacrylate having pits corresponding to infor...
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JPS5910134U |
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JPS5911553A |
PURPOSE: To improve the tansparency, the low bending restorability, the formability, and the performance of vapor deposition, by adopting a three-layer structure constituting the front and rear layers of the 1st thermoplastic resin and t...
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JPS599024A |
PURPOSE: To obtain the titled duplicate in which a fine air bubble does not mix in a resin layer and a dropout is scarce, by arranging a base plate opposing to a mold, reducing the pressure of a clearance part, casting a radiation curabl...
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JPS598149A |
PURPOSE: To form a uniform thin film to form high-precision signal pits, by providing a thin metallic film consisting of a metal, which can be etched optically and chemically, on the surface of a glass board. CONSTITUTION: A thin aluminu...
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JPS597023A |
PURPOSE: To make it possible to mold a disk without dust adhering to it, by allowing a stamper that is mounted on a mold to be secured at its central section by a securing shaft and at its periphery by a securing ring, and providing blow...
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JPS595017A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS591221A |
PURPOSE: To obtain the disk of a good S/N ratio, by controlling the feeding of a material to a main screw by the control of the rotation of a feed motor and varying the load of a main motor and the material density fed to the main screw ...
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JPS591222A |
PURPOSE: To improve the accuracy of a transfer, by placing a softened utraviolet-curing resin between said surface of the original plate having undulatory information signals on its surface and a transparent base plate, pressing the tran...
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JPS58224450A |
PURPOSE: To obtain an original disc of an optical disc high in quality, by forming a specified org. substance layer on a base, forming a metallic layer on this layer, forming holes corresponding to information bits with light beams, and ...
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JPS5858214B2 |
This invention relates generally to a manner of cooling an injection mold assembly which is designed for molding a centrally apertured part such as a video disc. The mold assembly comprises two halves 14, each including a platen 148 whic...
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JPS58220709A |
PURPOSE: To improve a manufacturing efficiency and enable to reduce a manufacturing cost, by pushing out a cooling water in a groove by sending a pneumatic air into the fluid passing groove provided in a mold, then sending a steam for he...
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JPS58218056A |
There is disclosed a new and improved method for making a stamping master for video disk replication wherein a film (18) of material which is reversibly convertible between two stable states, one having a high electrical conductivity and...
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JPS58215320A |
Nickel stampers used for the molding of capacitive electronic discs are treated prior to use in the molding process by heating the stamper in the presence of an oxygen containing gas, at a temperature from about 220 DEG C. to about 300 D...
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JPS5853411B2 |
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JPS58201619A |
PURPOSE: To obtain a disk-like record carrier which is useful for an electrostatic capacity type video disk, etc. by such an arrangement wherein electroconductive carbon black is heat treated in an atmosphere of steam, O2 and SO2, etc. a...
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JPS58199124A |
PURPOSE: To obtain a disk excellent in regeneration, heat resistance and shock resistance by a method wherein the disk is formed by the material containing irradiation crosslinking resin of a comparatively low polymerization degree and r...
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JPS58171322U |
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JPS58196962A |
PURPOSE: To finish the surface of a thin plate satisfactorily in a short time by attaching the thin plate on a turntable to turn the plate and moving an abrasive member in the radial directon, while pressing and forcing it to vibrate. CO...
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JPS58163215U |
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JPS58163009U |
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JPS58185049A |
PURPOSE: To eliminate the separation of a metallic layer from a substrate, by forming a metallic layer having high coupling force with an adhesive on a metallic film to which a recording track pattern is formed and then adhering the meta...
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JPS58159619U |
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JPS58157609U |
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JPS58177536A |
PURPOSE: To generate a signal for tracking with high precision at low cost by providing a layer where a spiral porjection-recess signal for tracking is provided concentrically on a recording medium provided on a base disk. CONSTITUTION: ...
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JPS58177539A |
PURPOSE: To prevent a pickup head (reproducing stylus) from breaking, by arranging a conductive softened resin on the base film side of a lamination sheet formed by laminating a thermal deforming resin on a base film and performing compl...
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JPS58177540A |
PURPOSE: To form a high-density disk of high quality with good reproductivity, by arragning a softened resin on the base film side of a lamination sheet formed by laminating a thermal deforming resin film on a base film. CONSTITUTION: A ...
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JPS58175152A |
PURPOSE: To prevent a metallic film from being peeled from a substrate, namely, a backing material when a disc is duplicated, by attaching a peeling prevention member to the outside circumferential part. CONSTITUTION: A stamper consists ...
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JPS58173624A |
PURPOSE: To obtain an information disk of high precision by such an arrangement wherein a radial ray permeable base board is arranged against a metal mold having uneven information signals with a specified space provided between them, an...
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JPS58173623A |
PURPOSE: To obtain an information disk of which distance between its surface and the surface of information signal is constant by such an arrangement wherein a metal mold having uneven information signals, a base board and a pressing pla...
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JPS58173625A |
PURPOSE: To obtain an information disk of less eccentricity by such an arrangement wherein a radial ray permeable base board having a hole for positioning is coupled with a metal mold having a protruded point for positioning at its cente...
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JPS58173626A |
PURPOSE: To obtain a copy of an information disk which is uniform in thickness of its molded resin layer and free from air bubbles and warp by such an arrangement wherein a base board is arranged opposingly to a metal mold with a specifi...
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JPS58168528A |
PURPOSE: To obtain a recorded disc made of resin with a uniform thickness by a method wherein photosetting resin is coated on a duplicate mold and then a replica base is placed on the resin and clamped with a pressing plate, which enable...
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JPS58166550A |
PURPOSE: To enhance the resistance to heat, chemicals, moisture and impact, the transparency, resistance to optical rotation and fidelity in molding by forming a magnetic layer which can be changed by energy on one side of an optically t...
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JPS58166549A |
PURPOSE: To obtain a disk substrate with superior resistance to heat, moisture, impact and chemicals, superior transparency, resistance to optical rotation, fidelity in molding, etc. by using a specified polymer composition. CONSTITUTION...
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JPS58166545A |
PURPOSE: To improve heat resistance, molding workability, moisture resistance, replica properties, and mechanical strength as compared with usual unsatured polyester resins by using a thermosetting crystalline unsaturated polyester resin...
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JPS58141435U |
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JPS58159202A |
PURPOSE: To prolong service life, by using a radiation curing lacquer layer consisting essentially of a mixture of a radiation curable compd. and a polymer compd. which has compatibility with said compd. and has adhesion to plastic subst...
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