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Abstract

A guide device for cutting a through dovetail joint consisting of a tail board template and a pin board template, the templates being made of a relatively thin material. The tail board template has a series of cutouts in the shape of an isosceles trapezoid provided longitudinally therein, the narrowest portions or tops of the cutouts in parallel alignment with the top edge of the tail board template and the broadest portions or bottoms of the cutouts in alignment below the tops of the cutouts. The pin board template has a main body serving as a base or bottom of the template and a series of fingers in the general shape of an isosceles trapezoid, of generally the same size and shape of the isosceles trapezoidal cutouts in the tail board, protruding from the main body of the pin board template. The isosceles trapezoidal fingers are connected to the main body by relatively short rectangular connecting portions or bridges, forming a series of rectangular areas that are open topped between adjacent fingers. Use of these templates with a router greatly facilitate the accurate cutting of tail boards and pin boards to form a through dovetail joint. There is also a stopper that can be used to with the tail board template for accurately adjusting the workpiece before cutting.

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