Importance

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Abstract

Defects in wooden boards, such as knots, knotholes or cracks, are repaired by forming an opening in the board at the site of the defect and forming a plug that fills the opening. In some forms of the invention the opening has a shape which interlocks the plug to the board. In another form of the invention, the plug is held in place by a transversely extending resilient member that is embedded in the plug and which is under tension which causes edge portions of the member to bite into or bear against the adjacent wood. Forming the opening includes cutting away bark encasement tissue that may adjoin the defect which encasement can cause a discoloration upon painting of the board and may eventually loosen. In some forms of the invention, cracks are repaired by making plural saw cuts along a crack to form the opening with the saw having a different angling relative to the board during each saw cut. In another form of the invention, the opening and plug extend between opposite surfaces of the board and have a width which increases at a plurality of spaced apart locations within the board and decreases at a plurality of alternate locations.

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First Claim