Abstract: In a process of forming a profiled tread surface on a ski, a cutting tool is moved in steps of defined length in the longitudinal direction of the tread surface to be profiled and in steps of defined length transversely to said longitudinal direction. The cutting tool thus moved is used to form said tread surface with individual recesses, which partly overlap and are defined by sawtooth-shaped step ramps extending in said longitudinal direction. Adjacent transverse rows of said recesses overlap preferably by one-half of the length of each of said transverse steps.

Abstract: A rail and stile member of a wood frame is joined at a curvilinear edge at abutting facial surfaces. In a number of embodiments the members have a tenon and mortise connection behind the curvilinear edge. In one embodiment a three piece joint is formed with curvilinear edges at each pair of abutting facial surfaces. The method of forming the joint includes the forming of a guide template having the desired configuration but displaced from the joint line and cutting of the rail and stile with a router tool of a preselected bit size.

Abstract: Apparatus and method for forming V-shaped grooves in a board material including a grooving tool having a V-shaped leading cutting edge with a preselected included angle for cutting a V-shaped groove to a preselected depth in the board material, means for producing relative movement of said grooving tool and said board material to cut the V-shaped groove in said board material, guide means for inhibiting nonlinear relative movement of said grooving tool and said board material to cause a straight groove to be cut in said board. The board material thus grooved may be folded to form structures for use as boxes and in certain furniture applications.