Extrusion die having elongated extrusion nozzle which facilitates tool changes
CA 1319478 C · Owner: Lupke, Manfred A. A. · Inventors: Lupke, Manfred A. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns extrusion dies for apparatus for producing seamless thermoplastic tubing. An elongate hollow core is provided extending through a bore in the extrusion head. The hollow core may carry service lines to downstream parts of the apparatus and may act as or may carry an inner mandrel extending coaxially in an extrusion nozzle. The invention provides hollow core, the diameter of which is not greater than the diameter of the bore of the extrusion head. Thus, it may be possible to withdraw the core in a downstream direction for tool changes and the like without the necessity of dismantling the extrusion head.
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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.