Curtain coater with displaceable edge guides and method

Details Curtain coater with displaceable edge guides and method Curtain coater with displaceable edge guides and method

1992-06-09

1994-07-19

Beck, Shrive

Coating processes

Falling curtain of coating material utilized

118324, 118DIG4, B05D 130, B05C 500

Patent

active

053307976

ABSTRACT:
A curtain coater and coating method for coating a moving web with at least one layer of a liquid coating composition utilizes a web-supporting roller for conveying the web along a path, a coating hopper for forming a free falling generally planar curtain of the coating composition which extends transversely of the web and impinges upon the web at a point on the path where the web is supported on the roller, edge guides on opposite sides of the web path for laterally guiding the falling curtain by contact with the curtain side edges, and a curtain intercepting member is occasionally displaceable from an inoperative position out of the path of the falling curtain to an intercepting position adjacent the web for intercepting the falling curtain, wherein the intercepting member has a dimension transversely of the web that is greater that the transverse dimension of the web itself and a portion of each of the edge guides adjacent to the web is displaceable independently of the coating hopper away from the web to a position removed from the web, preferably out of the plane of the falling curtain, and out of the way of the intercepting member to allow the intercepting member to take its intercepting position, and when the intercepting member is moved to inoperative position, each edge guide portion is returned to its position adjacent the web.

REFERENCES:
patent: 4479987 (1984-10-01), Koepke et al.
patent: 4647482 (1987-03-01), Degrauwe et al.
patent: 4922851 (1990-05-01), Morikawa et al.

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