Method and means for producing laminated sheets
CA 1047713 A · Owner: Welex · Inventors: Nissel, Frank R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermoplastic sheet comprising a lamina-bearing base is produced by feeding a heat-plastified laminated rod into a conventional sheet-forming die. The laminated rod is formed using an adaptor die which is interposed between a rodforming die and the sheet-forming die and which deposits a layer of heat-plastified material constituting the lamina on a segment of the peripheral surface of the cross-section of a heat-plastified rod of the base material as the rod is extruded, from the rod-forming die. The sheet-forming die converts the heat-plastified laminated rod into a laminated sheet.
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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 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.