Plywood manufacture using foamed glues

Details Plywood manufacture using foamed glues Plywood manufacture using foamed glues

1973-03-23

1976-06-29

McIntosh, John P.

Coating apparatus

With treatment of coating material

By agitation

118315, 222190, 222330, 222485, 261 28, B05C 1110, B32B 518

Patent

active

039658600

ABSTRACT:
Plywood is made by continuously propelling a liquid plywood glue in unfoamed condition at a predetermined flow rate, continuously foaming the glue as it is propelled, and continuously extruding or otherwise applying the foamed glue to the surface of a plurality of wood veneers. The flow rate of the unfoamed and foamed glue is maintained substantially the same on a unit weight of liquid glue per unit time basis. The veneers then are laid up into a plywood assembly and pressed into a plywood panel. The veneers may be preheated to expedite setting of the glue. The method is applicable generally to the application of a foamed liquid to a solid surface.

REFERENCES:
patent: 2731253 (1956-01-01), Spencer
patent: 2749005 (1956-06-01), Plusquellic
patent: 2791353 (1957-05-01), Dorn et al.
patent: 2982995 (1961-05-01), Groleau
patent: 3112527 (1963-12-01), Pankratz et al.
patent: 3224411 (1965-12-01), Blaha et al.
patent: 3239100 (1966-03-01), Peterson
patent: 3377655 (1968-04-01), Kucharski et al.
patent: 3408981 (1968-11-01), Poppe et al.
patent: 3428985 (1969-02-01), Boyd
patent: 3452710 (1969-07-01), Hentschel

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