Mca Disco-vision, Inc.

Discovision Associates

Manfred H Jarsen

Csaba K Hunyar

Norma Abigania Avanzado

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 is bonded to the substrate. The cured combination is stripped from the mold and is given a metallic coating to improve reflectivity. A clear plastic coating may be applied to protect the metal surface.

Elastomeric videodisc mold

A player for video discs includes an improved rotating turntable to provide a fluid cushion bearing to support a thin, flexible video disc. The turntable includes apertures which direct an air flow between the disc and the turntable surface and the flow of air acts as a hydrodynamic bearing.

Fluid cushion turntable for video disc player

A video disc master of glass, having a metal surface with microscopic apertures therein representing information, is coated with a photosensitive resist. The resist is uniformly exposed through the glass disc. The unexposed resist is removed. The resulting disc having surface irregularities can be used in a first process to produce 'stampers' for embossing replicas and, in a second process, to produce a mold for casting replicas.

Method of creating a replicating matrix

Method for making video discs and video disc molds

Replication utilizing a casting process

A video disc master of glass, having a metal surface with microscopic apertures therein representing information, is coated with a commercial photosensitive resist, the sensitivity of which has been enhanced. The resist is uniformly exposed through the glass disc. The unexposed resist is removed using conventional developers to which a surfectant is added. The resulting disc has surface irregularities of predetermined height which can be alternatively used to product 'stampers' for embossing replicas or to produce a mold for casting replicas.

A player for video disc includes a vacuum reading head to 'read' recorded information from a thin, flexible video disc. A rotating turntable provides a fluid cushion bearing to support the disc and the vacuum associated with the transducing head assembly 'draws' the disc toward the head and maintains an optimum head-to-disc spacing.

Growing community of inventors

Encino, CA, United States of America

Manfred H Jarsen