Profiling apparatus for a disk-like article having a cylindrical face and rounded corners

An apparatus for forming a cylindrical face and rounded corners joining both ends thereof on a disc-like article rotatably carried, having a traverse slide for movement in parallel relation with said cylindrical face, a cross slide slidably mounted on said traverse slide for movement in a direction transversal to the movement of said traverse slide, traverse feed means for reciprocatively moving said traverse slide, a profiling tool carried on said cross slide, a full form template having a straight portion and rounded corners joining both ends thereof, a non-extensible stylus fixed to said cross slide, and means for urging said cross slide to maintain contact between said stylus and said template, the improvement comprising;

• first and second assistant templates fixedly disposed and respectively presenting outwardly downward gentle slopes from said rounded corners of said full form template,
• extensible stylus means extensibly provided on said cross slide for contact engagement with said first and second assistant templates, and
• stylus actuation means for moving said extensible stylus means so as to bring the extensible stylus means into contact with said first assistant template when said non-extensible stylus ascends one of said rounded corners of said full form template and with said second assistant template when said non-extensible stylus ascends the other of said rounded corners of said full form template.