Patent ID: 6035615
Filing Date: 2000-03-14
Classification: B29C,B29L,B65B

Abstract:
A packaging unit for continuously producing aseptic sealed packages, containing a pourable food product, from a tube made of heat-seal packaging material in sheet form and fed along a vertical supply path said tube being filled with said food product, and said unit comprising:a first chain conveyor having a number of jaws, and defining an endless first path along which said jaws are fed;a second chain conveyor having a number of counter-jaws, and defining an endless second path along which said counter-jaws are fed;said first path and said second path comprising respective work portions adjacent to said tube supply path extending symmetrically on opposite sides of said supply path, so that said jaws of said first conveyor cooperate with respective said counter-jaws of said second conveyor along at least part of the respective said work portions, to grip said tube at respective equally spaced cross sections;at least said jaws comprising heating means for heat-sealing said tube;first cam guide means along said respective work portions for guiding said jaws, and second cam guide means along said respective work portions for guiding said counter-jaws, said jaws and said counter-jaws comprising cam-following means cooperating with said respective first and second cam guide means;wherein said first cam guide means and said second cam guide means each comprise at least a pair of cams, each cam of said pair of cams having a profile different from the other cam of said pair of cams along at least part of said respective work portions, said cam-following means comprising, for each said jaw and counter-jaw, at least a pair of cam-following elements, each cam-following element cooperating with a respective cam in a pair of cams.