Abstract: An apparatus for sealing an open end of a package comprises a first longitudinally extending sealing jaw, bearing mounted on a first eccentric shaft rotatable around a first rotational axis, and a second longitudinally extending sealing jaw, bearing mounted on a second eccentric shaft rotatable around a second rotational axis, the second sealing jaw being parallel with the first sealing jaw. At least one motor drives rotation around the first and second rotational axis in opposite directions, wherein the first and the second sealing jaws oppose each other, and are allowed to oscillate between sealing and open positions by moving towards and away from each other. A first and second transversally extending guiding bar cooperate with the first and second eccentric shaft via guiding pins running in guiding grooves, such that transverse play between the first and the second eccentric shaft and the first and second sealing jaw is allowed.

Abstract: An apparatus for sealing an open end of a package comprises a first longitudinally extending sealing jaw, bearing mounted on a first eccentric shaft rotatable around a first rotational axis, and a second longitudinally extending sealing jaw, bearing mounted on a second eccentric shaft rotatable around a second rotational axis, the second sealing jaw being parallel with the first sealing jaw. At least one motor drives rotation around the first and second rotational axis in opposite directions, wherein the first and the second sealing jaws oppose each other, and are allowed to oscillate between sealing and open positions by moving towards and away from each other. A first and second transversally extending guiding bar cooperate with the first and second eccentric shaft via guiding pins running in guiding grooves, such that transverse play between the first and the second eccentric shaft and the first and second sealing jaw is allowed.

Abstract: Described herein is a method and a unit for the formation of groups of products in a machine for continuous packaging of products, according to which at least two continuous rows of products are fed via two conveyor devices set in series with respect to one another along a first given path and in contact with at least one alignment element, which is set transverse to the first path and in front of the rows of products to align the rows themselves with respect to one another, and is displaced along a second, loop-like, path defined by two portions, along which the alignment element is set on the inside and on the outside, respectively, of the first path.

Abstract: Methods for forming packages from a web of preformed bags. In one exemplary method of forming packages from a web of preformed bags, a first bag is held open with air. A product is loaded into the first bag that is held open with air. An opening of the first bag is sealed. A next bag is indexed such that an opening of the next bag is proximate to an engagement member. The web is engaged with the engagement member. The web may be reverse indexed to pre-open the next bag. The web is disengaged by the engagement member. The next bag is opened with air for loading.

Abstract: A machine for forming a bag of a strip of weldable material, filling the bag with a fluent filling, and sealing the filled bag forms the strip into a longitudinally extending and laterally closed tube and continuously advances the tube longitudinally downward through a welding/folding station while pouring the filling into the tube above the station. A cross-seam welder and a folder at the station are both horizontally closable on opposite sides of the tube to form therein folds and a bag-forming crosswise weld. A vertically shiftable lifter is engageable under a filled section of the tube below the station. Simultaneously the welder and folder are closed on the tube to form a crosswise weld and to fold the tube horizontally inward while the filled section is raised and the welder and folder are moved downward generally synchronously while in contact with the downwardly moving tube.

Abstract: A packaging machine has a wrapping device for forming a tubular wrapping from a continuous web of heat-seal material, and for feeding products successively into the tubular wrapping; each product being located between two free tubular portions of the tubular wrapping, which are folded substantially onto the relative products, and are stabilized by means of at least two pairs of sealing devices fed along relative paths with independent laws of motion.

Abstract: An apparatus and method is disclosed for sealing in a single package bundles of product cartons which are conveyed in series along a moving conveyor belt. A stationary frame is aligned with the conveyor, and a movable carriage assembly is connected to the frame. Packages or cartons of product are stacked and bundled by film, such as thermoplastic film, in a series of sealing steps. The apparatus includes at least one motor mounted on the stationary frame and capable of engaging the carriage assembly to facilitate reciprocating movement of the carriage assembly in relation to the moving packages. A separate computer controlled servo motor drives the opening and closing of seal bars on the carriage assembly to seal the film at each end of the package.

Abstract: A packaging system includes a conveyor belt having a carrying surface for carrying an article to be packaged by a package film and an end sealing device including spaced upper and lower sealing blocks between which the article passes. A recessed chamber is formed in the carrying surface by extending the conveyor belt around specially arranged rollers. The end sealing device includes a machine frame slidably supported on rails. A driving system includes a motor and a reciprocating mechanism having an adjustable stroke coupling the machine frame to the motor. The rollers of the recessed chamber are attached to the machine frame to be movable therewith. The upper and lower sealing blocks are movably supported on the machine frame by upright posts with the lower sealing block accommodated in the chamber of the conveyor. Racks extend from the upper and lower sealing blocks with a toothed wheel matingly interposed therebetween for mechanically coupling the sealing blocks together.

Abstract: A latitudinal seal mechanism includes seal jaws 78, fixed cams 75, cam followers 76, a pair of partial cams 88, partial cam followers 78a, rotational shafts 80, coupling members 79, and shaft support portions. The seal jaws 78 are heated, and move circularly such that the seal jaws 78 abut on and move away from tubular film. The fixed cams 75 have shapes that correspond to locuses of movement of the seal jaws 78. The cam followers 76 support the seal jaws 78, and move along the fixed cams 75. The rotational shafts 80 move the cam followers 76 relatively about rotational centers of the rotational shafts 80. The coupling members 79 couple the rotational shafts 80 and the cam followers 76. The shaft support portions rotatably support the rotational shafts 80. The partial cams 88 have a shape that corresponds to a locus of movement of the pair of seal jaws 78 when the pair of seal jaws 78 holds the tubular packaging films.

Abstract: A method and machine for wrapping a product in a sheet of heat-seal wrapping material, whereby the sheet of wrapping material is folded by a fixed folding device onto a wall of the product so as to superimpose at least two portions of the sheet of wrapping material; the sheet of wrapping material, once folded, is gradually released from the fixed folding device; and a sealing surface of a sealing head is brought gradually into a position facing the superimposed portions as the superimposed portions are gradually released from the folding device.