Process and apparatus for producing endless laminated veneer boards

Abstract

A process and an apparatus for producing endless laminated veneer boards from a veneer-panel strand comprising veneer panels laid together in a plurality of layers by means of gluing and compression in a heated, continuously operating press. The veneer-panel strand is run through a preliminary press with a preheating device before it enters the press. The layers of glue applied to the veneer panels and/or the veneer panels for the center or a central-layer strand have a higher moisture content than the layers of glue and/or the veneer panels for the outer layers or the cover-layer strands. The veneer panels are each then assembled to give an upper and a lower cover-layer strand and, if required, a central-layer strand, and are combined to give a veneer-panel strand. Before it enters the continuously operating press, the veneer-panel strand is passed through a preliminary press with a microwave or high-frequency preheating device, the heat input of which into the veneer-panel strand acts from the inside outwards.

Dependencies are inferred from the claim text.