Extrusion head for extruding a tube-shaped strand from at least one thermoplastic melt for producing blown films
CA 2364156 A1 · Owner: Rubhausen, Anton · Inventors: Rubhausen, Anton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an extrusion head for extruding a tube-shaped strand from at least one, thermoplastic melt for producing blown films containing an internal member , and an external member, between which an annular space is formed wherein the external member , has at least one extrusion module with two extrusion members which are arranged on top of each , other and, wherein a separating gap, which terminates in the annular space is formed , between the extrusion, members of each one of the extrusion modules and wherein a channel system for , distributing the plastic melt into the annular space is formed in each extrusion module wherein the channel system, comprises an inlet area a …
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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
- Filed November 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2023.
- 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.