Patent ID: 6050065
Filing Date: 2000-04-18
Classification: B29C,B65B

Abstract:
A packaging machine of the flowpacking type, comprising a conveyor line for a continuously advanced packaging web, to which products to be packed are supplied successively, a length joining station for joining the packaging web to form a hose about the mutually separated products, and a cross joining station for closing this hose between the consecutive products and preferably also for cutting the hose in order to form separated, fully enclosed products, said cross joining station comprising two opposed, parallel jaw tools connected with a moving system for moving the jaws in two different main directions, viz. for imparting to the jaws, respectively, a working movement towards and away from each other and a reciprocating transport movement along said conveyor line for cooperation with successive cross joining areas on the advanced hose, the jaw tools being mounted opposite to each other on a sledge, which is mounted and driven so as to be reciprocally moves along a section of the conveyor line, while the jaws are mounted on this sledge so as to be cross displaceable towards and away from each other driven through movable transmission means from a motor which does not participate in the reciprocations of the sledge, characterized in that said transmission means comprise a rotary bushing which is mounted on the sledge and, in a longitudinally displaceable manner, is in operative engagement with a rotary shaft having a non-circular cross section and extending in a fixed position in said cross joining station along the moving path of the sledge, said rotary shaft being driven by a driving motor likewise mounted in a fixed position in the cross joining station.