Importance

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Abstract

An apparatus for doctoring a moving surface includes a blade holder component extending longitudinally across the moving surface and carrying a doctor blade. A support component is parallel to and supports the blade holder component. A first operating mechanism rotatably urges the doctor blade in a doctoring direction into contact with the moving surface, resulting in the doctor blade being acted upon by a reactionary thrust force in the plane of the doctor blade and a reactionary rotational force in a direction opposite to the doctoring direction. A pair of mutually opposed parallel guide rails are provided on one of the components, and rotatable rollers are spaced along the length of the other of the component. The rollers are in rolling contact and in mechanical interengagement with the guide rails to accommodate reciprocal movement of the blade holder component relative to the support component, and to resist both the reactionary thrust force and the reactionary rotational force acting on the doctor blade. A second operating mechanism reciprocally moves the blade holder component relative to the support component.

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First Claim