Apparatus for manufacturing cured polyolefin-insulated cables
CA 1049719 A · Owner: Fujikura Cable Works · Inventors: Ono, Motoyuki; Takaoka, Michio; Sano, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for manufacturing cured polyolefin-insulated cables comprising a curable polyolefin-extruding device a cur-, ing tube partitioned into heating and cooling zones by way of a certain partition area, for example, an area composed of a seal packing, the two zones being filled with circulating silicone oil and connected to different circulating systems through which, the polyolefin-covered cable core is drawn and a die provided, at the other end of the curing tube and connected to a supercooling device, where the pressurized oil is super-cooled to increase its density to such extent that the clearance between the outer surface of the cable core and the inner wall surface of the …
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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 March 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 6, 1996.
- 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.