Process and apparatus for the production of a colour wedge foil
CA 1193060 A · Owner: Dynamit Nobel Aktiengesellschaft · Inventors: Pabst, Horst; Brinkmann, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for the co-extrusion of a foil consisting of two differently coloured or colourless meltstreams, each melted in its own extruder of thermoplastic, plastic. The apparatus comprises a wide-slot tool with a distributing channel, a choker-bar, a flow-channel consisting of a bottom and a top lip, and a nozzle. It is characterized in that two wide-slot tools, geometrically alike in crosssection, each having a nozzle-width corresponding to that of the two melt-streams, are flanged together to form a tool having a nozzle-width made up of the individual nozzle-widths. And a process carried out by this apparatus.
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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 September 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 10, 2002.
- 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.