Doctor blade assembly

Details Doctor blade assembly Doctor blade assembly

B - Operations, Transporting

05

C

32/47

B05C 11/04 (2006.01) B41F 9/10 (2006.01)

Patent

CA 1048771

DOCTOR BLADE ASSEMBLY Abstract of the Disclosure A doctor blade assembly for paper coaters and gravure rolls and other doctor blade applications includes a cantilever-support blade controlled by a tube-type actuator. The tube has a collapsible wall section adjacent the blade and a blade-engaging extension which bears against the blade between its supported and free end. In one embodiment, a transversely movable profile adjuster or series of profile adjusters are disclosed which selectively apply side forces to the wall section of the tube to permit corresponding selective pressure adjustments on the blade, for the purpose of reducing or eliminating localized coating non-uniformities. A novel blade retention assembly permits the clamping of blades of varying thicknesses and includes one or more trans- versely positioned magnets for temporarily retaining the blade on the support. An opposing clamp is formed with an elastomeric pad or expandable tube which engages the blade adjacent its inner edge and which forces or urges the blade downwardly against a machined seat to assure proper seating. In a further embodiment, a twin blade coater is disclosed in which the tips of the blades are independently rotatable about a common axis and which utilize a pair of the tube-type actuators connected to a common pressure source. -1-

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