Extrusion device having intermediate extruder
CA 1090078 A · Owner: Gabbrielli, Ernesto · Inventors: Gabbrielli, Ernesto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In extrusion devices it is known to have a screw-type conveyor extrusion press. In this invention an extrusion device comprises an extruder housing, having a cylindrical interior wall and a cylindrical rotor rotatable in the wall at spaced relationship from the interior wall of the housing so, as to define an extrusion passage therebetween which connects at one end to an inlet, and at an opposite end to an outlet which has an extrusion control, device located to close a portion of the extrusion passage. The construction also includes at least one second extrusion control device located in the passage between the outlet and the inlet which is regulated to close at, least a portion 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 November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- 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.