Apparatus for transversely sealing a wrapper hose

Abstract

An apparatus for periodically forming transverse seams in a longitudinally advanced wrapper hose for transversely sealing the wrapper hose between articles previously arranged therein, has cooperating rotary upper and lower sealing shoes between which the wrapper hose passes and which periodically pinch the wrapper hose walls together and transversely seal them to one another. There is further provided a flexible bar grate arranged to support the wrapper hose in the zone of the sealing shoes. The bar grate is formed of a plurality of parallel-spaced interconnected bars which include two end bars, each articulated to a connecting rod. The connecting rods, in turn, are articulated to one another by a joint pin. A drive arm is affixed to the shaft of the lower sealing shoe spaced from and aligned with the latter. The drive arm has a radial guide groove into which projects the joint pin of the connecting rods. The lower sealing shoe projects into the space between the two end bars. The bar grate is rotated -- in synchronism with the lower sealing shoe -- by the shaft of the lower sealing shoe through the drive arm, the joint pin and the connecting rods.