Doctoring apparatus
AssigneeThermo Electron Web System, Inc.
InventorsRonald F. Goodnow, Robert A. Reid, Robert Austin
Life of this patent
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Abstract
An apparatus for doctoring a cylindrical rotating surface, comprising a doctor back mounted for rotation about a first axis, and a blade carrier assembly mounted on the doctor back for rotation about a second parallel axis. A doctor blade is removably supported by the blade carrier assembly and is loaded against the rotating surface by a force applied to rotate the doctor back about the first axis. A liquid filled flexible walled tube extends along the second axis between the doctor back and the blade carrier assembly. The blade angle is adjusted by expanding and contracting the liquid filled tube to rotate the blade carrier about the second axis.
Claims6
Apparatus for doctoring a cylindrical rotating surface, said apparatus comprising:
- a doctor back;
- means for mounting said doctor back for rotational movement about a first axis parallel to the rotational axis of said surface;
- a blade carrier assembly;
- means for mounting said blade carrier assembly on said doctor back for rotational movement about a second axis parallel to said first axis;
- a doctor blade removably supported on said blade carrier assembly, said doctor blade having a working edge adapted to be applied to said surface;
- flexible-walled first and second tubes extending along opposite sides of said second axis at locations interposed between and in contact with said blade carrier assembly and said doctor back;
- a supply of liquid contained in said first tube;
- actuating means for loading the working edge of said doctor blade against said surface by rotatably urging said doctor back in one direction about said first axis, with rotation of said blade carrier assembly in the opposite direction about said second axis being hydraulically opposed by the liquid contained in said first tube;
- and
- means for pneumatically pressurizing said second tube to rotatably urge said blade carrier assembly in the said opposite direction about said second axis and against said first tube.
Apparatus for doctoring a cylindrical rotating surface, said apparatus comprising:
- a doctor back;
- means for mounting said doctor back for rotational movement about a first axis parallel to the rotational axis of said surface;
- a blade carrier assembly;
- means for mounting said blade carrier assembly on said doctor back for rotational movement about a second axis parallel to said first axis, said means for mounting comprising a plurality of bracket members fixed relative to said doctor back at spaced locations along said second axis, and a plurality of pivot rods affixed to said blade carrier assembly, said pivot rods being removably received by and being supported on said bracket members for rotational movement about said second axis;
- a doctor blade removably supported on said blade carrier assembly, said doctor blade having a working edge adapted to be applied to said surface;
- a flexible-walled tube extending along one side of said second axis at a location interposed between and in contact with said blade carrier assembly and said doctor back;
- a supply of liquid contained in said tube;
- and
- actuating means for loading the working edge of said doctor blade against said surface by rotatably urging said doctor back in one direction about said first axis, with said blade carrier assembly thus being rotatably urged in the opposite direction about said second axis and against said tube.
Dependencies are inferred from the claim text.