Extrusion die with interchangeable extrusion nozzles
CA 2111871 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 annular channel elongate nozzle of an extrusion die (10) suitable for use for extrusion into a travelling mold tunnel has an inner core (16) profiled for attachment to any one of a number of interchangeable end fitting nozzles outlet (100). The profiling takes the form of a step between an upstream portion (22) of the core and a reduced diameter downstream portion (24). Each end fitting outlet has an annular sleeve (34) to fit about the downstream core portion to extend the surface of the upstream portion of the core. The sleeve abuts the step (26) thereby locating the end fitting outlet correctly. No locking means is necessary between the end fitting and the core in the region of …
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
- Filed May 11, 1992 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 2014.
- 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.