Patent ID: 6190156
Filing Date: 2001-02-20
Classification: B29C,B65H,Y10S,Y10T

Abstract:
In combination, a flexible thermoplastic wire and a coil forming apparatus for forming an elongated continuous coil out of a straight continuous source of said flexible wire, said apparatus comprising:an axially rotative helical channel mounted about a fixed longitudinal axis and defining an upstream end having an inlet opening allowing the wire to be fed therein and a downstream end having an outlet opening allowing the coil to be discharged therethrough;an injection nozzle for feeding the wire into said channel inlet opening, and integrally rotatable with said channel;a power device, for rotating said helical channel and said injection nozzle in a common rotative movement;wherein the wire fed into said channel will slide therealong according to a helical travelling direction upon which it will be formed into a coil,wherein the helix curve angle of said wire remains constant through the full length of said helical channel,said helical channel rotating in a direction opposite the travelling direction of the wire and at a speed of rotation allowing the coil being discharged at said channel outlet opening to be imparted with an output translational displacement, while being exempt of any rotational displacement about said longitudinal axis.