Air bearing for information carrier in the form of a flexible disc and disc reader using this air bearing
CA 1112761 A · Owner: Thomson-Brandt · Inventors: Roullet, Gerald; Chevalier, Serge; Bortuzzo, Jean-P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, The invention relates to support systems for flexible information-carrying discs. More particularly the inven-, tion relates to an air bearing support plate (1) for a flexible disc (3) of which the sliding surface (2) is free in a preponderant sector from any profile irregularity (6) capable of affecting the flatness of the annular band of the disc (3) containing the information. The invention is applicable in particular to the optical reading by reflection or transmission of information carried by a flexible disc.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.