Tool for dressing pulpstones

A burr for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp, said burr comprising:

• a cylindrical body portion having an outer surface, a longitudinal axis, and an axial dimension;
• a plurality of teeth protruding radially outward from said outer surface;
• the plurality of teeth extending helically along said outer surface;
• at least one annular channel extending transversely to the longitudinal axis along said outer surface;
• and
• said burr being configured for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp.

A burr for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp, said burr comprising:

• a cylindrical body portion having an outer surface, a longitudinal axis, and an axial dimension;
• a plurality of teeth protruding radially outward from said outer surface;
• the plurality of teeth extending helically along said outer surface;
• at least two annular channels disposed in said outer surface;
• and
• said burr being configured for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp.

A burr for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp, said burr comprising:

• a cylindrical body portion having an outer surface, a longitudinal axis, and an axial dimension;
• a plurality of teeth protruding radially outward from said outer surface;
• the plurality of teeth extending helically along said outer surface;
• at least one annular channel disposed in said outer surface;
• said burr being configured for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp;
• and
• wherein said at least one annular channel includes a radial depth dimension greater than or about equal to a radial height dimension of said teeth, said depth dimension and said height dimension being substantially perpendicular to said longitudinal axis.

A burr for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp, said burr comprising:

• a cylindrical body portion having an outer surface, a longitudinal axis, and an axial dimension;
• a plurality of teeth protruding radially outward from said outer surface;
• the plurality of teeth extending helically along said outer surface;
• at least one annular channel disposed in said outer surface;
• said burr being configured for dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp;
• and
• wherein said cylindrical body portion comprises a cylindrical ring having a radial thickness dimension, wherein said at least one annular channel includes a radial depth ranging from about 20 to about 50 percent of said radial thickness of said cylindrical ring.

A burr for dressing a grinding surface of a pulpstone grinding tool, said burr comprising:

• a cylindrical ring having an outer surface, a longitudinal axis, and an axial dimension;
• two annular channels disposed in said outer surface, said two annular channels dividing said outer surface into three surface regions having approximately equal axial dimensions, each of said two annular channels including an axial dimension ranging from about 1 to about 10 percent of the axial dimension of the cylindrical ring;
• a plurality of elongated teeth protruding radially outward from said outer surface, said plurality of elongated teeth including substantially triangular cross sections and extending in a direction offset from said longitudinal axis by a lead angle ranging from about 5 to about 75 degrees;
• and
• said burr being useful for dressing a grinding surface of a pulpstone grinding tool.

A method of dressing a grinding surface of a pulpstone grinding tool adapted for mechanical preparation of wood pulp, said method comprising:

• providing a burr including:
• a cylindrical body portion having an outer surface;
• a plurality of teeth disposed on and protruding from the outer surface;
• the teeth extending helically along the outer surface;
• at least one annular channel disposed in the outer surface;
• rotatably mounting the burr on an assembly adapted to traverse the axial dimension of the pulpstone grinding tool;
• pressing the burr into contact with the grinding surface of the pulpstone grinding tool;
• rotating the pulpstone grinding tool, wherein the burr rolls over the grinding surface of the tool;
• and
• traversing the burr along the axial dimension of the pulpstone grinding tool.

A method of preparing wood pulp comprising:

• providing a burr including:
• a cylindrical body portion having an outer surface;
• a plurality of teeth extending from the outer surface;
• the teeth extending helically along the outer surface;
• at least one annular channel disposed in the outer surface;
• rotatably mounting the burr on an assembly adapted to traverse the axial dimension of the pulpstone grinding tool;
• pressing the burr into contact with the grinding surface of the pulpstone grinding tool;
• rotating the pulpstone grinding tool, wherein the burr rolls over the grinding surface thereof;
• traversing the burr along the axial dimension of the pulpstone grinding tool;
• and
• using the pulpstone grinding tool to mechanically grind wood into wood pulp.