Patent ID: 7424987

Claim:
Coiling device to coil rolled or drawn long products, comprising a mandrel, arranged cantilevered and rotatable with respect to a central longitudinal axis, wherein said long products are able to be wound on said mandrel in adjacent and superimposed spirals, in order to form a compact coil having the geometric shape of a circular ring with lateral flanks substantially orthogonal, or very angled, with respect to said central longitudinal axis, wherein said mandrel comprises a flange substantially orthogonal, or very angled, with respect to said central longitudinal axis and able to define a first lateral flank of said coil, wherein said mandrel also comprises first arm elements, able to define the cylindrical surface of the core that forms said coil, and second arm elements, opposite said flange, and able to define a second flank of said coil, said first and said second arm elements being movable between a first coil-forming position and a second coil-removal position, wherein said second arm elements are provided with preventing means able to contact said first arm elements, in order to prevent said first arm elements from moving from said first coil-forming position to said second coil-removal position when said second arm elements are in said first coil-forming position, and wherein said second arm elements comprise a wall, which in said first coil-forming position is parallel to said flange, and a lower tooth which extends parallel to said central longitudinal axis and is aligned with said first arm elements to cooperate with a most external spiral of a first layer of said spirals of said coil and to facilitate an inversion of deposition of said spirals.