METHOD OF MENDING DEFECTIVE WOOD PLATE

摘要

A method of mending a defective wood plate uses, instead of putty, a solid patching material which is smaller in thicknesswise shear strength and compressive strength than the wood plate and is sized greater than a defect of the plate which is to be mended. The solid patching material is applied to the plate in such a manner as to cover the defect and then compressed in the thicknesswise direction to undergo shear fracture. As a result, that part of the material which overlies the defect is thrust into the defect. The compression is effected in two consecutive stages, one using a rigid member and the other an elastic member. The part of the material filled in the defect is separated from the other part which remains on the plate. Where this method is applied to plywood production, the material will be forced into the defect without resorting to an extra compression step while the plate is being bonded to another.