Abstract: Plywood and other glued, laminated assemblies are made by spreading a liquid foamed glue on a surface of a first lamina. A second lamina is superimposed and, while the glue is in a fluid condition, the resulting assembly is prepressed under pressure sufficient to spread the glue and to wet and unite the opposed faces of the laminae. This forms a flat, self-sustaining intermediate laminate which thereafter may be pressed further to develop the glue bond between the laminae.

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.