Matches 51 - 89 out of 89 < 1 2
Match Document Document Title
4370740 Rotary recording medium  
A rotary recording medium has an information signal along a spiral main track comprising a multiplicity of successively adjacent track turns of respective track turn numbers, first and second...
4346469 High density information disc  
High density information discs comprising a conductive carbon-loaded polyvinylchloride disc lubricated with a fractionated methyl alkyl siloxane lubricant which contains a hexaalkyldisilazane...
4346468 High density information disc  
High density information discs comprising a conductive carbon-loaded polyvinylchloride disc lubricated with a fractionated methyl alkyl siloxane lubricant which contains a...
4342660 High density information disc lubricants  
High density information discs comprising a conductive carbon loaded polyvinylchloride disc is lubricated with a fractionated methyl alkyl siloxane lubricant which contains an...
4340953 Information recording medium and recording and reproducing system using the same  
An information recording medium comprises a silicon substrate, a silicon dioxide film formed on one principal surface of the semiconductor substrate and a silicon nitride film formed on the silicon...
4327430 Information signal recording medium of rotary type with overlapped tracks  
An information signal recording medium of rotary type has a flat surface with successions of pits formed therein as respective concavities in response to an information signal. The successions of...
4321621 High density recording system using side-by-side information and servo tracks  
An information signal recording system records both an information signal and at least one kind of reference signal for providing a tracking control on a recording medium. The reference signal is...
4316279 Optical recording in thin photoresist  
A method of producing an information storage disc by optical techniques includes the steps of coating a flat, reflective disc surface with a thin coating of radiant energy sensitive material,...
4304806 Information carrying discs  
An information carrying element comprising a substrate having adhered to at least one surface thereof a separate layer having a thickness of 1.0 to 100 microns and a circular or spiral pattern of...
4299736 Conductive molding composition and discs therefrom  
Polyvinyl chloride base molding compositions containing conductive carbon particles which have been treated with a fatty acid chloride have reduced melt viscosities, improved processabilities, and...
4296158 Information carrying discs  
Information-carrying discs are comprised of a substrate having an information bearing layer derived from 15 to 100% by weight of at least one polyacryloyl-containing heterocyclic monomer.
4275101 Video disc lubricants  
Molecular distillation of methyl alkyl siloxanes of the formula ##STR1## wherein R 1 and R 2 are alkyl groups of 4-20 carbon atoms and m and p are integers to produce a distillate having a...
4275100 Video disc processing  
A conductive video disc replica is cleaned by washing with an aqueous solution comprising an oxidizing agent, a base and a surfactant of a fluorocarbon added in an amount so that the solution has a...
4241120 Video discs and molding compositions therefor  
A polyvinyl chloride based molding composition containing polymer grafted conductive carbon particles has good processability, low heat distortion temperature and good dispersion of the conductive...
4228050 Conductive molding composition  
An improved molding composition having a bulk resistivity below about 500 ohm-cm at 900 megahertz for compression molding video discs comprising sufficient conductive carbon black particles to...
4206256 Metallized video disc having an insulating layer thereon  
Methyl alkyl siloxanes can be employed as the dielectric coating on metallized video disc replicas when the metal surface on the disc has a high surface energy.
4151132 Molding composition  
An improved molding composition for compression molding non-coated video discs containing about 12-20 percent of conductive carbon black particles, about 10 percent of a vinyl chloride-vinyl...
4148067 Modulated groove records with a thick metal layer and method for making same  
A modulated groove record, such as a video disc, has a coating on a conductive layer bearing the modulated groove formed from the material of the layer. The material may be aluminium and the...
4137550 Video disc with a dielectric layer formed from acetylene and nitrogen  
This invention relates to a video disc with a thin polymeric dielectric layer formed from acetylene and nitrogen in a glow discharge. The dielectric layer has improved age deterioration resistance...
4127872 Novel amino siloxane lubricants  
Novel siloxane lubricants of the formula ##STR1## wherein R 1 is methyl or (CH 3 ) 3 SiO--, R 2 is methyl, R 3 is ##STR2## WHEREIN R 4 is methyl or --(CH 2 ) n NH--CH 2 ) m NH 2 , n is an...
4106107 MIS readout device with dielectric storage medium  
A readout device is disclosed which comprises a substrate of semiconductive material having a source and drain region formed therein. These regions of the device are placed adjacent to the surface...
4098030 Method for forming a narrowed-electrode pickup stylus for video disc systems  
A novel pickup stylus includes a tapering dielectric support element which has a tip defined by a prow and a relatively flat surface remote from the prow. The dielectric support element has an...
4077052 Video disc capacitive recording means with a conductive bilayer  
This invention relates to a capacitive recording means comprising a video disc with a thin conductive bilayer on the surface of the disc wherein the bilayer is a first layer of copper and a second...
4077051 Video disc with a conductive layer having an oxygen content gradient  
This invention pertains to a video disc having a conductive bilayer thereon of a copper layer and a nickel/chromium/iron alloy layer wherein the alloy layer contains oxygen which decreases in...
4072985 Video disc with a dielectric layer formed from styrene and nitrogen  
This invention relates to a video disc with a thin polymeric dielectric layer formed from styrene and nitrogen. The dielectric layer has improved age deterioration resistance, wear characteristics...
4018984 Video disc record having spirally aligned sync storage locations  
Video disc record is provided with a spiral information track containing recorded representations of composite video signals. The information representations occupying the length of each...
4018945 Method of making a metallized video disc having an insulating layer thereon  
A polymeric film applied to a video disc by glow discharge techniques is treated with a subsequent glow discharge in air to improve wear properties.
4007295 Olefin-SO.sub.2 copolymer film adhesion to a substrate  
To improve the adherence of an olefin-SO 2 copolymer film employed as an electron beam resist to a metallic substrate, a thin film of gold is first applied to the substrate. The resulting bond is...
4004080 Metal coating for video discs  
An improved metal coating for a video disc of a grooved polymer disc, a conductive metal coating thereon and a dielectric coating on said metal coating, wherein said metal coating comprises a film...
3982066 Metal coating for video discs  
An improved metal coating for a video disc of a grooved polymer disc, a conductive metal coating thereon and a dielectric coating on said metal coating comprising a trilayer film of a first layer...
3968326 Trapezoidal smooth grooves for video disc  
A method of forming a disc having an information recording groove of regular cross-sectional shape by forming a preliminary spiral groove of trapezoidal cross-section in a disc having a relatively...
3909517 Disc records with groove bottom depth variations  
An information record employs a storage medium comprising a metallized base material having a dielectric coating thereon. The dimensions of an information track contained in a groove in the storage...
3882214 Trapezoidal smooth grooves for video disc  
A method of forming a disc having an information recording groove of regular cross-sectional shape by forming a preliminary spiral groove of trapezoidal cross-section in a disc having a relatively...
3833408 VIDEO DISCS HAVING A METHYL ALKYL SILICONE COATING  
Application of certain methyl alkyl siloxane compounds to the surface of video disc replicas reduces surface friction generated during playback with no sacrifice in video quality.
3081383 Method and means for variable resistance recording  
2997451 Conductive phonograph record containing thermoplastic resin and carbon black  
2253014 Phonograph record  
1807270 Visionograph record and method of making the same  
0903198 Title is not available  
Matches 51 - 89 out of 89 < 1 2