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AssigneeSasib S.p.A.
InventorsSanto Caenazzo, Sandro Corticelli
Estimating the term…
The invention relates to a device for sealing the folded over and overlapped end flaps (L1, L2) of the plastics material wrapper for packages (P), particularly for packages of cigaerettes. In this device, the packages (P) to be sealed are passed after each other between the heated sealer bodies (7) of at least a stationary pair of opposite sealer bodies (7--7) the active faces of which engage, in their operative position, the respective ends of the packages (P) with the intermediary of the parallel facing stretches (102) of two endless belts running in the same direction and at the same speed as the packages. According to the invention, the active surface of each sealer body (7) of at least one pair of opposite sealer bodies (7--7) comprises at least two slightly protruding i.e. in-relief zones (8,9; 18,19,20; 108,208,308,109,209,309; 118,119,120,218,219,220) staggered from each other both in the direction (F) of movement of the packages (P) and transversely to said direction. In the operative position of two opposite sealer bodies (7,7), the distances between the surfaces of the slightly protruding zones of the two sealer bodies is such that the higher specific pressure exerted at said slightly protruding zones will not damage the packages (P) and their contents.
A device for sealing folded over and overlapped end flaps of a plastic material wrapper for packages, said device comprising means for moving the packages in serial relationship along a predetermined path, first and second endless belts disposed on opposite sides of said path, such that parallel stretches of said endless belts extend along opposite sides of said path, means for moving said endless belts in the same direction as, and at the same speed as, the packages, at least one pair of opposed sealer members located on opposite sides of said path and movable to an operative position wherein an active surface of each sealer member provides engagement between a respective end face of a said package and a corresponding intermediate portion of respective ones of said parallel stretches of said first and second endless belts, said active surfaces of said at least one pair of sealer members each comprising at least two slightly protruding zones staggered with respect to each other both in the direction of movement of said packages along said path and transversely to said direction of movement, and the spacing between the protruding zones of said sealer members, when said sealer members are in said operative position, being such that pressure exerted at said protruding zones will not damage the packages and the contents thereof.
Dependencies are inferred from the claim text.