Apparatus for the uniform application of foamed liquid...

Details Apparatus for the uniform application of foamed liquid... Apparatus for the uniform application of foamed liquid...

B - Operations, Transporting

05

C

32/36

B05C 9/12 (2006.01)

Patent

CA 1043096

ABSTRACT OF THE DISCLOSURE Foamed liquid mixtures are applied to substrates, in particu- lar foamed plywood glues are spread on traveling wood veneers in the manufacture of plywood, by a method comprising the following steps: The liquid is withdrawn from a source of the same and foamed. The foam is continuously extruded or otherwise spread on an inter- mittently moving substrate during the periods of motion of the sub- strate. The foamed liquid is continuously diverted from the sub- strate during the periods of rest of the substrate, The diverted foamed liquid then is defoamed and cycled back to the liquid source where it is mixed with fresh liquid. This makes possible applying a uniform spread of the foamed liquid on the substrate even though the motion of the substrate is started and stopped at frequent in- tervals.

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