Patent ID: 7566023

Claim:
Device for coiling a long product comprising a mandrel with a substantially cylindrical shape and rotating around its own axis, and a containing element coaxial with said mandrel, rotating together therewith and defining a front wall to contain the coil of product to be formed, wherein said mandrel comprises a forming zone for at least a first spiral of said coil, wherein said containing element comprises an annular channel to clamp the leading end of said product around said mandrel, and wherein said containing element is axially movable with respect to said mandrel between a first position in which said leading end of said product is inserted and said annular channel is arranged in correspondence with said forming zone, and a second position for forming at least one subsequent spiral in which said coil of product is completed and said annular channel is displaced from said forming zone, said containing element remaining in said first position temporarily and said second position being retracted with respect to said mandrel so that said annular channel is outside the space occupied by said coil during the completion of said coil, wherein said at least one subsequent spiral is parallel with said first spiral with no subsequent spirals protruding laterally with respect to said first spiral after completion of said coil and aligned on a plane transverse to said first spiral.