Importance

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Abstract

Heat-sealing device including mutually opposite active heads that are associated with respective counter-rotating driving shafts and are subjected to the action of cam elements that move the heads along a path that is partially parallel to a continuous tubular container that includes the products to be packaged. The oppositely arranged active heads, during the rotation of the respective counter-rotating driving shafts, move mutually closer to clamp the tubular container in the region that separates one product from the other and to perform the heat-sealing of that region and the cutting of the container that separates each package from the adjacent one. A planetary-gear system is interposed between the active heads and the corresponding driving shaft to make the individual heads, during the rotation of the driving shaft, perform a revolving motion that keeps them parallel to themselves, and to cause the mutual approach of the mutually opposite heads in a mutually parallel relationship along an approach path that is substantially perpendicular to the tubular container.

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First Claim