Apparatus and method for applying variable pressure to a surface in corrugated paperboard manufacturing
CA 2212301 C · Owner: Lauderbaugh, David M. · Inventors: Lauderbaugh, David M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (12) and method for applying variable pressure to a surface (10). The apparatus includes a frame (34) secured to a fixed structure and located proximate to the surface (10). A plurality of pressure applicators (200) are mounted on the frame (34). Each pressure applicator (200) includes a foot (56) in movable relation relative to the frame (34) in a direction substantially perpendicular to the surface (10). The foot (56) is connected to a pressure device (226) that biases the foot (56) away from the surface (10). Each pressure applicator (200) also includes a variable pressure source (202) connected to a control device (230, 232) for varying the pressure supplied to the …
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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 December 6, 1996 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2018.
- 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.