Method and apparatus for adjusting pressure of cushioning pneumatic cylinder pressure on press, when cushion platen is at its setup position
CA 2124173 C · Owner: Kirii, Kazunari · Inventors: Kirii, Kazunari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a cushioning device of a press having a pneumatic cylinder for producing a blank-holding force to be applied to a blank through a cushion platen arid a pressure ring an optimum initial value of the pneumatic pressure of the pneumatic cylinder when the cushion platen is placed at a setup position lower than the lower stroke end is calculated based on die-set information relating to the pressure ring and including a predetermined optimum value of the blank-holding force and machine information relating to the cushioning device so that the calculated optimum initial pneumatic pressure provides the optimum blank-holding force during a pressing operation irrespective of a volumetric increase …
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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 May 24, 1994 and granted November 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2016.
- 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
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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.