Bottom caul plate
CA 1108818 A · Owner: Canadian Forest Products Ltd. · Inventors: Patrick, Archibald P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A press useful in the production of hard board from a wet lap layer. The press has an upper and a lower platen which can be heated. The platen can be moved towards and away from each other. An upper caul plate goes against the upper platen and on top of the wet lap layer when the press is in use. A screen is positioned beneath the wet lap layers when the press is in use. A bottom caul plate does between the screen and the bottom platen. The bottom caul plate comprises a flat metal sheet having channels formed in one side. Apertures extend through the caul plate from the flat other side to the bases of the channels formed in the first side. A method of using the press is described. The press …
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 September 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 15, 1998.
- 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.