Patent ID: 7617658

Claim:
A sealing device for producing sealed packages filled with pourable food product from a sheet packaging material, said sealing device comprising: a supporting frame; forming means movable with respect to said frame along a given path to fold said sheet packaging material into a given shape; sealing means carried by said forming means to seal said sheet packaging material and form said packages; and electromagnetic power means for supplying electric energy to said sealing means, said power means comprising at least one primary winding fixed to said frame and connectable to an electric energy source, and a secondary winding movable along said path, powering said sealing means, and receiving electric energy by electromagnetic induction from said primary winding as said secondary winding travels past the primary winding; wherein when interconnected by electromagnetic induction, said primary winding and said secondary winding are arranged so as to have respective adjacent portions interjacent in a first direction crosswise to said path and so that said adjacent portions of said primary winding and said secondary winding face one another in a second direction perpendicular to said first direction and perpendicular to said path.