Patent ID: 7246767

Claim:
Winding machine for rolled or drawn wire/rod with turn clutch device for automatic winding, of the type comprising a reel with mandrel and base flange and an external mobile containment counter flange, wherein the counter flange is openable to allow the axial extraction from the reel mandrel of the completed coil, the base flange comprising a substantially annular recess to receive the head of the wire/rod to be wound, characterized in that: i—said recess is formed by means of a continuous or discontinuous base rib, placed annularly projecting from an internal surface of said base flange; ii—said recess having a form with a section that substantially tightens toward the bottom, with an external entrance width equal to or greater than the diameter of the wire/rod and an internal base width smaller than said diameter of the wire/rod, so that the wire/rod can enter into said recess but cannot reach the bottom if not forced; iii—on the opposite side to said base rib, on the mandrel side, tilted ribs and/or a spiral course are provided that push by rolling and sliding said head of the wire/rod within said recess and toward the bottom of said recess, so that with a cooperation of the form of slight traction of the mandrel-coil said wire/rod is engaged by auto-clamping in said recess by its end and therefore is clamped by the formation of the first turn of the wire/rod and by the following turn without slackening.