Arrangement for providing continuous grinding in a pulp grinder
CA 2275637 A1 · Owner: Setala, Simo · Inventors: Setala, Simo; Liimatainen, Heikki; Tuovinen, Olli
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement for providing continuous grinding in a pulp grinder comprising a feed chute and a piston in the feed chute moving lengthwise of the feed chute for pressing the wood in the feed chute against a grindstone. The arrangement comprises rotary feed members (6) between the piston (5) and the grindstone (1) on the sides of the feed chute (2) for pushing the compressed wood (3) further against the grindstone (1). Also the arrangement comprises a , closing member (7) that can be pushed between the compressed wood (3) and the piston (5) to prevent the wood (3) from moving backward with the piston (5) as the piston (5) is moved to the initial position ready for the stroke, to , …
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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 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2019.
- 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.