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AssigneeU.S. Philips Corporation
InventorsHerman Gerard Lakerveld, Gerard Eduard VAN Rosmalen, Kornelis Bulthius, Johannes Petrus Sinjou
Estimating the term…
A playing apparatus, more specifically a video player for playing round records with a central hole, which are made of a transparent material, which records at one side have a transparent surface and at their other side are provided with information tracks which are optically readable with the aid of a read beam, which tracks are covered by a light-reflecting layer. In order to enable both relatively thick rigid records and relatively thin flexible records to be played on one playing apparatus, the invention provides a transparent adapter disc, which together with a flexible record can be positioned on the playing apparatus and driven in a rotary fashion. In order to prevent dust particles from being trapped between the flexible record and the transparent adapter disc, the adapter disc may be provided with a central recess with a number of air admission apertures at the circumference thereof, so that during operation a thin film of air is formed between the flexible record and the adapter disc.
An apparatus for playing a round disc provided with a center hole and a transparent body reflectively encoded with optically readable information on a surface of the transparent body, the apparatus comprising:
An apparatus for playing a round disc provided with a center and a transparent body reflectively encoded with optically readable information on a surface of the transparent body, the apparatus comprising:
Dependencies are inferred from the claim text.