Process and apparatus for coating webs and adjusting the wet app

Details Process and apparatus for coating webs and adjusting the wet app Process and apparatus for coating webs and adjusting the wet app

1979-10-04

1981-07-21

Lusignan, Michael R.

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

118126, 118407, 427358, 427428, B05D 312, B05D 128, B05C 1102, B05C 302

Patent

active

042799490

ABSTRACT:
The disclosure concerns both an apparatus and a method for adjusting the applied weight of a coating composition on a web traveling over a support roll. The support roll is opposed by a scraper that removes excess coating composition which was just previously applied to the web. The scraper has an entrance flank that is opposed to the support roll. The downstream end of the entrance flank is defined by a sharp edged end. The length of the pressing zone between the scraper and the support roll is adjusted by swiveling the scraper around its axis with respect to the support roll so as to adjust the position of the sharp edged end of the scraper with respect to the coated surface of the web. The surface of the support roll is elastic so that it can be depressed under the pressure applied thereto by the sharp edged end of the entrance flank. The scraper may be developed as a sector of a roll having the axis of the scraper as the axis of the curve. Further, there may be a plurality of scrapers on a single support body, thereby facilitating easy substitution of scrapers.

REFERENCES:
patent: 2051403 (1936-08-01), Boyer et al.
patent: 2534320 (1950-12-01), Taylor
patent: 3143438 (1964-08-01), Campbell

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