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公开(公告)号：US4277071A
公开(公告)日：1981-07-07
申请号：US878872
申请日：1978-02-17
申请人： David E. Birt , Lyn Holt
发明人： David E. Birt , Lyn Holt
CPC分类号： G11B23/38
摘要： A record having an information track cut into the surface and a visible pattern formed on surface "lands" bordering the track. The pattern is shallower than the track depth, typically 0.7 micron for a 25 micron sound microgroove record track. A method of providing the marking by applying solvent to a lacquer before cutting a master is described.
摘要翻译： 具有切割到表面的信息轨道的记录和形成在与轨道相邻的表面“陆地”上的可见图案。 该图案比轨道深度浅，对于25微米声音微槽记录轨道，通常为0.7微米。 描述了在切割母版之前通过向漆施加溶剂来提供标记的方法。
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公开(公告)号：US4288481A
公开(公告)日：1981-09-08
申请号：US168643
申请日：1980-07-11
申请人： David E. Birt , Peter J. Clarke
发明人： David E. Birt , Peter J. Clarke
CPC分类号： B29C59/02 , B29D17/005 , B29C2791/001 , B29C59/04
摘要： A two stage moulding procedure for the production of foil video discs. In a first pressing operation a satin finish consisting of a surface irregularity is applied to a surface of the foil, and then, in a second pressing operation, the foil is pressed between stamper plates to impart thereto, at one or both surfaces an impression of the information or data to be recorded. The satin finish may be formed by pressing the foil between stamper plates bearing the satin finish at their inwardly facing surfaces or alternatively between a pair of rollers bearing the satin finish at their surfaces.
摘要翻译： 用于生产箔片视频光盘的两阶段成型程序。 在第一按压操作中，将由表面不规则形成的缎面整理施加到箔的表面上，然后在第二次压制操作中，将箔压在压模板之间以赋予其在一个或两个表面上的印模 要记录的信息或数据。 缎纹可以通过在其内表面上承载缎面精整的压模板之间或在其表面具有缎面精整的一对辊之间压制箔来形成。
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公开(公告)号：US4364816A
公开(公告)日：1982-12-21
申请号：US213483
申请日：1980-12-05
申请人： David E. Birt
发明人： David E. Birt
CPC分类号： C25D17/06
摘要： An apparatus, for use in an electroplating arrangement, for establishing electrical contact with a metal or metalized cathode plate used in production of a disc record matrix. The apparatus includes an electrically conductive contact member and a clamping means for holding the contact member against a cathode plate supported by the apparatus. The contact member and clamping means are shaped so that electrical contact is established at the periphery only of the cathode plate.
摘要翻译： 一种用于电镀装置的装置，用于与用于生产盘记录矩阵的金属或金属化阴极板建立电接触。 该装置包括导电接触构件和用于将接触构件保持抵靠由该装置支撑的阴极板的夹持装置。 接触构件和夹紧装置成形为使得仅在阴极板的周边处形成电接触。
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公开(公告)号：US4231730A
公开(公告)日：1980-11-04
申请号：US92062
申请日：1979-11-06
申请人： David E. Birt
发明人： David E. Birt
CPC分类号： B29C59/02 , B29D17/005 , B30B15/061 , Y10S425/81
摘要： A means for moulding thermoplastics video discs having one or two shaped resilient compensators to maintain the stamper plates in parallelism with the plastics foil during moulding. The compensators may be of a rubber and may contain a thermally conductive material.
摘要翻译： 用于模制具有一个或两个成形弹性补偿器的热塑性塑料视盘的装置，以在模制期间将压模板与塑料箔保持平行。 补偿器可以是橡胶，并且可以包含导热材料。
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