Abstract: A slotting apparatus has a slotting tool for producing a slot of a substantially arcuate cross section axially in an inner circumferential surface of a tubular workpiece held in position. When the slotting tool moves in one direction axially in the tubular workpiece, it follows an arcuate path by moving progressively toward and away from the inner circumferential surface of the tubular workpiece. The slotting tool cuts off the inner circumferential surface of the tubular workpiece, forming an arcuate slot therein. When the slotting tool moves back, it is spaced from the slotted surface region of the workpiece, and travels along a straight path back to its starting position. The slotting tool is supported on a tool support angularly movably supported by first and second link arms in a casing.

Abstract: A machine for automatically shaving a large bar of chocolate for forming a thin chocolate shaving that curls into a spiral, for use for decorative purposes. The machine has cutters that will cut an end of a chocolate bar in three separate spirals, on each stroke of the cutter. The chocolate bar is moved a desired distance for new cuts. The knives are partly curved in cross section and have cutting edges that are angled to insure a smooth separation of a thin shaving to form the curl around the curvature of the individual knife. The chocolate temperature is important in cutting, and generally is maintained in the range of 88 to 90 degrees Fahrenheit. The machine itself can be placed in a suitable environment or chamber to maintain that temperature.