GENERAL PURPOSE PLYWOOD CONSTRUCTION Russian patent published in 2021 - IPC B27D1/04 

FIELD: woodworking industry.

SUBSTANCE: invention relates to the woodworking industry, in particular to the production of plywood. The construction of general-purpose plywood with an even number of veneer sheets includes two central veneer sheets with an adhesive layer and with the same direction of wood grain in them and the remaining veneer sheets, which are located symmetrically to the central axis of the plywood sheet with alternation - a veneer sheet with an adhesive layer and a veneer sheet without him. At the same time, the rest of the veneer sheets, except for the two outer ones - the upper and the lower, where they are located one at a time, are arranged symmetrically to the central axis of the plywood sheet, two at a time. Wherein these two veneer sheets have the same arrangement of wood fibers, one of which with an adhesive layer, and the other without it, and they alternate with two veneer sheets, both of which have the same arrangement of wood fibers, one of them with an adhesive layer, and the other without it, and the two veneers have a mutually perpendicular direction of wood grain relative to two adjacent veneers.

EFFECT: strength of the plywood sheet increases in the directions of its length and width.

1 cl, 4 tbl