Mold block with air flow control
CA 2312873 C · Owner: Lupke, Manfred A. A. · Inventors: Lupke, Manfred A. A.; Lupke, Stefan A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mold block which is used in a moving mold tunnel comprises first and second mold block sections (3, 5) which meet at their parting faces (4 6) to close , the mold block. Each mold block section has a product shaping interior surface (15, 35) and an air movement passage (11 30). An air flow controller is , provided in each mold block section (3 5). Through various different , positionings of the two air flow controllers the mold block can be operated , in any one of four different modes including a first vacuum forming mode in which air is withdrawn from the mold block through both of the mold block sections (3, 5), a second vacuum forming mode in which air is withdrawn from the mold …
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 February 5, 1999 and granted April 8, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2021.
- 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.