Patent ID: 6193180
Filing Date: 2001-02-27
Classification: D21B

Abstract:
An apparatus for grinding wood in a pulp grinder, the apparatus comprising:a grindstone;a feed chute extending to the grindstone for feeding wood therein to the grindstone along a feed direction, the feed chute defining a width crosswise to the feed direction;a piston movable within the feed chute along the feed direction for pressing wood in the feed chute against the grindstone, the piston being retractable away from the grindstone to allow a new batch of wood to be fed into the feed chute ahead of an end of the piston that presses against the wood, the end of the piston defining recesses therein; andpushing members disposed on two opposite sides of the feed chute, the pushing members being insertable into the recesses in the end of the piston when the piston reaches an end of its travel in the feed direction such that the pushing members move behind the wood in the feed chute, the pushing members being structured and arranged to push the wood in the feed direction toward the grindstone as the piston is retracted to allow a new batch of wood to be fed into the feed chute.