Angled-rib blocking slab for pulpwood grinder
AssigneeLake Superior Paper Industries
InventorJames H. Bittinger, Jr.
Life of this patent
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Abstract
A blocking slab is used in a grinding chamber of a pulpwood grinder having a rotatable grindstone. The pulpwood grinder is suitable for reducing wood into pulp and objectionable shims and shives. The blocking slab includes a retaining side extending the length of the grindstone for permitting the passage of pulp. The blocking slab also includes a plurality of ribs forming a collecting channel proximate the retaining side and extending the length of the grindstone for collecting shims and shives therein. The plurality of ribs are angled for directing the shims and shives collected in the collecting channel toward the ends of the grindstone thus providing further reduction of the shims and shives.
Claims18
A pulpwood grinder having:
- a frame;
- a grindstone for rotation in a direction of travel;
- and a blocking slab, the blocking slab comprising:
- a first rib extending the length of the grindstone and having a convex leading side with an apex;
- wherein the rib is affixable to the frame proximate the grindstone such that the leading side and the apex are arranged opposing the direction of travel;
- and
- wherein the rib includes a trailing side opposite the leading side.
A pulpwood grinder including a rotatably mounted grindstone having an axis of rotation and a direction of travel and a blocking slab proximate the grindstone, the blocking slab comprising:
- a plurality of longitudinally spaced-apart convex ribs each having two axial ends and an intermediate portion therebetween, wherein a first rib includes a retaining side generally parallel to the axis of rotation and a second rib includes a remote side generally parallel to the axis of rotation;
- the ribs defining at least one convex channel therebetween and extending the length of the grindstone;
- wherein each channel forms an apex in the intermediate portion such that the channel is proximate the retaining side relative to the remote side at the apex and extends from the apex generally toward the axial ends and toward the remote side.
A pulpwood grinder suitable for reducing wood into pulp and shives, the pulpwood grinder having a rotatable grindstone with two ends;
- and a blocking slab, the blocking slab comprising:
- a retaining side affixed to the grinding chamber proximate the grindstone and extending the length of the grindstone for permitting the passage of the pulp between the grindstone and the blocking slab and preventing the passage of the wood of a selected size;
- and
- a rib extending the length of the grindstone and forming a collecting channel, the collecting channel operably connected to the retaining side and extending the length of the grindstone, for collecting the shives;
- wherein the rib and collecting channel are angled for directing the shives collected in the collecting channel toward the ends of the grindstone.
A pulpwood grinder comprising:
- a grinding chamber;
- a grindstone having two ends and a direction of rotation wherein the grindstone is rotatably mounted proximate the grinding chamber;
- and
- a plurality of blocking slabs affixed to the grinding chamber and proximate the grindstone wherein the blocking slabs include a first convex rib extending the length of the grindstone.
Dependencies are inferred from the claim text.