Abstract: A folding assembly for producing a gable portion of a sealed package of pourable product, wherein the gable portion has first and second walls sloping with respect to each other and joined at a seal, and a flap connecting lateral edges of the first and second walls. The folding assembly is supplied with packs, each having an axis and, at one end and on opposite sides of the axis, two end portions which are folded to form the gable portion, with the end portions having, respectively, a first and a second portion to be folded, which are joined by a lateral face of the pack. The folding assembly includes a folding mechanism which interacts, on opposite sides of the axis, with the first and second portion of the pack to fold the second portion onto the lateral face, and the first portion onto the second portion to form the flap.

Abstract: An apparatus 10 for sealing packages 20 is to be mounted as a part of a larger packaging machine, which fills packages 20 with products or substances, preferably food or beverages but could be any other suitable substance, then closes and seals the packages using the sealing apparatus 10 by folding each package transversally, thereby closing it and sealing the transversal fold, and subsequently delivers the packages to a final folding station.

Abstract: A top sealer for a gable top package having a sealed top fin includes an arm support and a pair of opposing arms pivotally mounted to the arm support. The arms each have a sealing jaw at about an end thereof. The arms are pivotal to move the sealing jaws toward and away from one another through an arc. The arm support is linearly movable toward and away from the package, as the arms pivot, to move the sealing jaws downward, toward the package, to alter the arc of the pivoting sealing jaws.

Abstract: A folding assembly for producing a gable portion of a sealed package of pourable product, wherein the gable portion has first and second walls sloping with respect to each other and joined at a seal, and a flap connecting lateral edges of the first and second walls. The folding assembly is supplied with packs, each having an axis and, at one end and on opposite sides of the axis, two end portions which are folded to form the gable portion, with the end portions having, respectively, a first and a second portion to be folded, which are joined by a lateral face of the pack. The folding assembly includes a folding mechanism which interacts, on opposite sides of the axis, with the first and second portion of the pack to fold the second portion onto the lateral face, and the first portion onto the second portion to form the flap.

Abstract: An automatic packaging machine for forming a latching flip-top box from a blank. A plurality of mandrels are coupled to a conveyor system. Each of the mandrels includes a mounting block for coupling the mandrel to the automatic packaging machine, a package-holding assembly operatively connected to the mounting block and being rotatable about a first axis from a first position to a second position, and a flap holder assembly operatively connected to the mounting block. The flap holder assembly is rotatable about a second axis substantially perpendicular to the first axis. A plurality of plows and tucker assemblies sequentially manipulate portions of the blank in order to form portions of the box.

Abstract: Pressure pads useful in the closing and sealing of multiple components which define the bottom of a carton, particularly a gable-type carton, bottom having a square or rectangular footprint. The invention is especially useful in the closing of the bottom of cartons wherein the sealing fin of the carton bottom is non-handed.

Abstract: A paper packaging container is obtained by tube forming with a longitudinal seal of web-shaped packaging material. The package is filled with liquid food, and a transverse seal of the tube packaging material is made to form a pillow-shaped preliminary shape container. The preliminary shape container is then cut, and a final shape container having a top, side walls and a bottom is formed by folding the packaging material along crease lines. Flaps are formed during the forming of the top of the container and are folded outwardly and downwardly onto side wall faces of the container. The top of the container is formed as a shed roof shape. The method of folding the flaps outwardly from the top of the container and the resulting shaped container allows attachment of a large spout with a wide mouth on the top, while achieving high speed manufacturability without subjecting the paper packaging material to high stresses.

Abstract: A bottom folding assembly for a packaging machine is configured to infold the bottom side panels, leading panel and trailing panel of a carton for forming a sealed carton bottom in such a manner as to reduce the contact of rotating elements with the carton material to reduce the generation of dust. The bottom folding assembly is positioned about a rotating turret that defines a turret plane. The mandrels are configured to receive a carton in the tubular form and to carry the carton with the carton positioned such that a bottom of the carton is positioned at a free end of the mandrel. The bottom folding apparatus, located between a carton bottom heater and a carton bottom sealer includes a rotating drive shaft mounted transverse to the turret plane and a pair of opposing rotating members are operably mounted to the drive shaft and are disposed on either side of the turret rotational path. The rotating member rotate in a plane transverse to the turret plane.

Abstract: An automatic packaging machine for forming a latching flip-top box from a blank. A plurality of mandrels are coupled to a conveyor system. Each of the mandrels include a mounting block for coupling the mandrel to the automatic packaging machine, a package-holding assembly operatively connected to the mounting block and being rotatable about a first axis from a first position to a second position, and a flap holder assembly operatively connected to the mounting block. The flap holder assembly is rotatable about a second axis substantially perpendicular to the first axis. A plurality of plows and tucker assemblies sequentially manipulate portions of the blank in order to form portions of the box.

Abstract: An apparatus for forming the bottom end wall of a carton from a rectangular carton blank having oppositely disposed scored end panels and oppositely disposed unscored end panels includes a rotating mandrel assembly adapted to receive an open-ended carton blank through an open top end of the carton blank, a heating station, a folding station and a sealing station. The folding station has a pair of oppositely disposed reciprocating break fingers to contact and fold inwardly the scored bottom end panels and biasing means for folding inwardly down the unscored bottom end panels. The folding station is rotatable 90° between two functional orientations, a first orientation wherein the break fingers are aligned in the direction of mandrel movement, and a second orientation in which the break fingers are perpendicular to the direction of mandrel movement.

Abstract: A carton pulling assembly pulls a partially formed carton from a mandrel on a form, fill and seal packaging machine. The machine has a vacuum source for providing a vacuum and includes a machine controller. The partially formed carton has a sealed bottom wall. The carton pulling assembly includes a carton puller element movable in a reciprocating manner toward and away from the mandrel. A vacuum head assembly is mounted to the carton puller element for reciprocating movement therewith. The vacuum head assembly includes a cylinder and a finger configured for reciprocating movement within the cylinder having a suction element mounted thereto. The finger has a vacuum channel for communicating vacuum from the cylinder to the suction element. The finger is movable between an extended position in which the suction element contacts and engages the partially formed carton sealed bottom wall and a retracted position in which the reciprocating finger pulls the carton from the mandrel.

Abstract: Methods of producing a laminated package with an opening which is sealed by a tear-off strip or a pouring element as well as a corresponding laminated package are described. To be able to produce a laminated package with such a closure inexpensively, the following steps are provided in the method punching out an opening in a packaging material, coating the packaging material at least in the area of the opening, creating a package sheathing from the coated packaging material, conveying the package sheathing to a filling machine or to an equipment unit from the filling machine, and attaching a tear-open strip to the opening in the package sheathing in the filling machine or in the equipment unit upstream from the filling machine.

Abstract: The disclosure relates to a method and an apparatus for forming and thermosealing one end of a packaging container which is manufactured from thermosealing material. The packaging container is placed in a conveyor which brings it into contact with mechanical forming devices (22) which progressively reform the packaging container end so that a sealing fin (6) oriented in the direction of movement of the packaging container is formed. In a subsequent sealing station (12), thermoplastic material located in the sealing fin (6) is heated to sealing temperature, whereafter wall portions included in the sealing fin are mechanically urged against one another during simultaneous cooling and continued advancement.

Abstract: An apparatus for forming the bottom end wall of a carton from a rectangular carton blank having oppositely disposed scored end panels and oppositely disposed unscored end panels includes a rotating mandrel assembly adapted to receive an open-ended carton blank through an open top end of the carton blank, a heating station, a folding station and a sealing station. The folding station has a pair of oppositely disposed reciprocating break fingers to contact and fold inwardly the scored bottom end panels and biasing means for folding inwardly down the unscored bottom end panels. The folding station is rotatable 90° between two functional orientations, a first orientation wherein the break fingers are aligned in the direction of mandrel movement, and a second orientation in which the break fingers are perpendicular to the direction of mandrel movement.

Abstract: A top sealer for a form, fill and seal packaging machine includes first and second anvils disposed on opposing sides of a processing path of the machine. The anvils are configured to move transverse to the processing path for engaging the top fins of each of the cartons and compressing the fins for forming the carton top seal portion. A first wedge section is mounted to the first anvil and a second wedge section is mounted to the second anvil. The first wedge section includes a raised portion extending from a face of the wedge. The first wedge is mounted to the anvil to contact the raised portion with a first vertical panel/extended gable panel juncture contemporaneous with the anvils engaging the top fins. Contact of the raised portion with the first vertical panel/extended gable panel juncture forms a crease at that juncture. A method for forming a top seal at the fin panels and a crease at the juncture is also disclosed.

Abstract: A top panel pre-folder for a form, fill and seal packaging machine for forming, filling and sealing an extended top panel gable top carton includes an mandrel positioned along the machine processing path that is movable from above the carton to the interior of the carton as the carton moves along the processing path. A pair of spaced apart pivotal arms, each disposed on opposing sides of the mandrel and transverse to the processing path, is pivotal about an axis toward and away from the mandrel. Each arm includes a flap mounted thereto having a raised portion extending from a face of the flap. The arms pivot to contact the flaps with gable side panels of the carton to infold the gable side panels inwardly over the mandrels. The flap raised portions contact the gable side panels at about gable side panel/vertical side panel junctures.

Abstract: A packaging machine includes a bottom breaker which has first to third prefolding members (41) to (43). The third prefolding member (43), serving to prefold a fold forming portion (27) by bending this portion (27) outward along a base part thereof, is pivotally movable from a nonoperative position P0 to a second operative position P2 via a first operative position P1. The fold forming portion (27) is moved with a first bottom panel (21) by the operation of the second prefolding member (42) so as to be brought into contact with the third prefolding member (43) and thereby bent outward while the third prefolding member (43) is pivotally moved from the nonoperative position P0 toward the first operative position P1. The third prefolding member (43) is pivotally moved from the first operative position P1 toward the second operative position P2 after the operation of the second prefolding member (42) to thereby bend the fold forming portion (27) through an increased angle.

Abstract: A pressure pad suitable for use in the heat sealing of a substantial universe of bottom-panel folding designs for closing the bottom of a carton or container. This new pressure pad includes a pattern of sculpting of that surface thereof which is presented to the infolded panels of the bottom of a laminated paperboard carton thereby providing a pressure pad that is substantially universal with respect to its ability to repeatedly effect the desired heat sealing of a plurality of geometrically differing combinations of bottom panels defining the bottom of a paperboard carton.

Abstract: A gussetting machine having adjustable spans between the gussetting fingers. The gussetting fingers on opposite sides of a wrapper move in opposite directions driven by rotating a spline shaft which engages a hub having an angled bore therethrough such that the surface of the hub nutates with a pitch and yaw motion. A housing riding on the surface of the hub experiences the pitch and yaw motions. A bracket surrounding the hub has a shaft for allowing the hub to rotate about the pitch axis. A the bracket is pivotably mounted on a pivot block to allow the bracket to yaw. Gussetting arms attached to the brackets swing back and forth in opposite directions simultaneously. The angled bores in the hubs are 180 degrees offset from each other such that the gussetting arms move in unison in opposite directions. The angles of the bores can be increased for larger gussetting arm swings or decreased for smaller gussetting arm swings.

Abstract: The disclosure relates to a method in the forming of packaging containers (1) which have sealing fins in which the packaging material is sealed inside-to-inside, and also projecting, double-walled corner flaps (8). In order to form a parallelepipedic packaging container, the corner flaps are folded down and sealed to the outside of the packaging container, which subjects a sealing fin running between the corner flaps to stresses which may entail untightness in the packaging container. This is avoided in that the sealing fin, prior to the downward folding operation, is deformed in that at least a portion of the fin (4) is laterally displaced in relation to adjacent portions of the fin.

Abstract: The present invention forms and seals the top end of a container prior to filling and bottom sealing. The top end may have a fitment attached thereon at a variety of different positions on a form, fill and seal packaging machine. The fitment may be a screw cap, a push-in, a flip-cap type or similar fitments. The container may be a flat top, tetrahedral or similar type container. The fitment may be applied on the exterior or the interior of the container.

Abstract: The present invention forms and seals the top end of a container prior to filling and bottom sealing. The top end may have a fitment attached thereon at a variety of different positions on a form, fill and seal packaging machine. The fitment may be a screw cap, a push-in, a flip-cap type or similar fitments. The container may be a flat top, tetrahedral or similar type container. The fitment may be applied on the exterior or the interior of the container.

Abstract: The combination of a carrier for a container, a squaring plate, a drive for the squaring plate, and a sealing assembly. The carrier accepts a container having first and second spaced flat walls that are substantially parallel to each other with the container in an erected state and third and fourth walls each connecting between the first and second flat walls. The carrier has a first edge against which the first wall of the container can be abutted so that the first wall is thereby supported in a first orientation with the container operatively held by the carrier. The squaring plate is guided in movement relative to the carrier towards the first edge.

Abstract: The present invention forms and seals the top end of a container prior to filling and bottom sealing. The top end may have a fitment attached thereon at a variety of different positions on a form, fill and seal packaging machine. The fitment may be a screw cap, a push-in, a flip-cap type or similar fitments. The container may be a flat top ., tetrahedral or similar type container. The fitment may be applied on the exterior or the interior of the container.

Abstract: A carton score line breaker assembly for breaking four end closure panels. The assembly includes two oppositely disposed pairs of breaker elements for, in turn, breaking the two oppositely disposed panels inwardly. Both pairs of elements are continuously rotating.

Abstract: A carton end panel folding mechanism for forcing both the leading and trailing panels of a gable top carton inwardly prior to the sealing of same. The folding mechanism includes four equally spaced blades, wherein each blade is shaped along its leading and trailing edges so as to be engaged at its trailing edge by a leading panel, forcing the leading panel inwardly and the blade forward, causing the leading edge of the next blade to engage the trailing panel and urge same inwardly.

Abstract: An inner seal portion (30a) of an open edge portion (1a, 1b) of a paper container (1) is aligned face-to-face with an inner peripheral heating portion of a seal-heating apparatus. An outer seal portion (30b) of the open edge portion is aligned face-to-face with an outer peripheral heating portion (4, 5, 6, 7, 13, 14, 15, 16) of the seal-heating apparatus. At least the inner peripheral heating portion (8, 17) is oscillated about an axial line thereof so as to vary the hitting position of the inner seal portion against which hot air blown from the hot air blowing holes (8a) of the inner peripheral heating portion (8) hits. Thus, the seal portion (30) of the paper container (1) can be equally and properly heated.

Abstract: A linear drive apparatus for moving a canon in a packaging machine from a first position to a second position is set forth. The apparatus includes first and second spaced apart guide rods and an engagement assembly that is disposed between and slidably engages the first and second guide rods. The engagement assembly is adapted to engage one or more cartons for movement between the first and second positions. The apparatus further includes a drive shall onto which a drive roller is disposed for co-rotation. A first drive belt is connected to the drive roller and disposed about the drive roller in a clockwise direction at a first end thereof while a second end of the first drive belt is connected to a first portion of the engagement assembly.

Abstract: A carton score line breaker assembly for breaking four end closure panels. The assembly includes two oppositely disposed pairs of breaker elements for, in turn, breaking the two oppositely disposed panels inwardly. Both pairs of elements are continuously rotating.

Abstract: A gable-bottom carton gripper is disclosed for lifting and transporting container blanks between various positions within a packaging machine. Container blanks are sealed in a gable-bottom configuration using predesigned sealing jaws. The sealing jaws feature strategically placed ribs which, during ultrasonic sealing of the container bottoms, cause the formation of a longitudinal bubble disposed along a bottom fin of each gable-bottom container. A carton gripper is adapted to grip the bottom fin while supporting the bottom panels of the container. The gripper includes a rigid member bent to conform to the shape of a gable-bottom container, with a gripping edge defining a fin channel to secure the bottom fin within a fin chamber. The longitudinal bubble prevents the fin from being displaced from the fin chamber during the lifting and transporting process.

Abstract: An apparatus for sealing a fin at a gabled end of a carton is disclosed. The apparatus includes a longitudinal force mechanism for applying a sealing force to a first pair of opposed flaps of the gabled end of the carton. The longitudinal force mechanism is movable from a first position in which the gabled end of the carton is in a generally open condition to a second position at which the fin of the gabled end is sealed. A transverse force mechanism applies oppositely directed transverse forces to a second pair of opposed flaps of the gabled end of the carton as the longitudinal force mechanism moves from the first position to the second position. The transverse force mechanism urges the second pair of opposed flaps toward one another during movement of the longitudinal force mechanism. The second pair of opposed flaps are thus urged inward toward one another as the longitudinal force mechanism moves to form and seal the fin thereby preventing "duckbilling".

Abstract: A carton blank includes a laminated blank body having a top and a bottom. A plurality of bottom creases are formed in the bottom of the blank body. The bottom creases define bottom flaps that are adapted to be folded and sealed to form a substantially rectangular bottom surface of a finished gable top carton. The bottom flaps are sealed together along a bottom seal that substantially bisects the bottom surface of the finished carton. A plurality of top creases are formed in the top of the blank body. The top creases define top flaps that are adapted to be folded and sealed into a gable top of the finished gable top carton, with the gable top having an upstanding longitudinal top fin. The top creases are arranged on the blank body to enable the carton blank to be folded and sealed such that the top fin of the finished gable top carton may be either parallel with, or transverse to, the bottom seal of the finished gable top carton.

Abstract: A folding and tucker-tacker station operates upon a flat bottom end closure of a packaging sleeve, which closure comprises first and second panels opposite each other, third and fourth panels opposite each other and between the first and second panels, and a minor panel protruding from the outermost edge of the third panel. The station comprises a mounting supporting first, second and third jaws oscillatable transversely of the sleeve axis for folding inwards the first, second and third panels, and a fourth jaw displaceable along, but not transversely of, the axis for folding inwards the fourth panel. The third jaw has a recess for receiving the minor panel.

Abstract: A method and apparatus are provided for sealing a gable-top container to allow easier opening, as well as the carton sealed by the method provided When the container is sealed, a portion of at least one sealing jaw is recessed to prevent functional impairment of the underlying pouring spout tips.

Abstract: A folding and tucker-tacker station operates upon a flat bottom end closure of a packaging sleeve, which closure comprises first and second panels opposite each other, third and fourth panels opposite each other and between the first and second panels, and a minor panel protruding from the outermost edge of the third panel. The station comprises a mounting supporting first, second and third jaws oscillatable transversely of the sleeve axis for folding inwards the first, second and third panels, and a fourth jaw displaceable along, but not transversely of, the axis for folding inwards the fourth panel. The third jaw has a recess for receiving the minor panel. The fourth jaw is disposed after the third jaw along the path of a mandrel transporting the sleeve.

Abstract: Disclosed is a gable-top container including structure for reducing the force required to open the container by inducing buckling in the first and second upper rib panels of the gable-top container.

Abstract: A spouted, gable-topped carton has its top closure fin sealed by welding employing an ultrasonic horn and an anvil giving a suitable profile of contour sealing of the fin. There is a straight continuous lengthwise seal where the fin is two-ply and a meandering continuous lengthwise seal where it is four-ply, while the sealed portions of the four-ply spout part of the fin are of lesser total extent in proportion to the area of that spout part than are the sealed portions of the other four-ply part of the fin in proportion to its area.

Abstract: A mandrel used in a packaging machine being in a tubular shape and provided with a cooling chamber at one end so as to cool a plain plate which is positioned at the top of the mandrel and contacts the heated, infolded and compressed bottom of a tubular package carton blank. Four projections are formed on the outer surface of the mandrel so as to contact each corner of the tubular package carton blank to leave it open. A pair of water cooling pipes are provided in the tubular mandrel with a space left between the internal wall of the tubular mandrel and connected to the cooling chamber so that only the bottom of the heat-sealed container made of a tubular package carton blank with thermoplastic coatings thereon is cooled and the side walls of the container are free from moisture condensation.

Abstract: A container blank particularly suitable for carrying liquids formed from a paperboard web fed in from a roll, the upper and lower edges of which are provided with short cut lines along the score lines forming the side panels. The method for obtaining such as blank consists of a set of rectilinear cut lines spaced apart from each other in correspondence of said upper and lower edges executed at the same time as said short cut lines or during a following stage, the lips defined by short cut lines and by score lines parallel to the edges being folded over and brought into contact with the corresponding panels simultaneously with the carrying out of short cut lines or later after the side seaming of the blank; in this way the container can selectively exhibit different types of top and bottom end closures.

Abstract: An apparatus for folding the top closures of tubular containers of square to rectangular cross section having a bottom into the form of a gabled roof. The top closure comprises first and second pairs of opposed quadrilateral panels, and each of the first panels has fold lines. The apparatus comprises first and second folding members provided at an intermediate portion of a path of transport of the container by a conveyor, between a filling device and a top closure sealing device along the path. The first folding member inwardly folds the first pair of panels between the second pair while the container is being transported by the conveyor, whereupon the second folding member operates to inwardly fold the second pair of panels over the first pair already folded by the first folding member. The top closure is foldable into the gabled form reliably and can therefore be subsequently sealed free of any trouble.

Abstract: This relates to a carton or cup having a conventional type of gable end which includes sealing flaps which are heat sealed or bonded to one another. The cup is particularly adapted to be closed by hand wherein control over the sealing flap positions is not possible as in the case of machine closed cups. Accordingly, the intermediate folded sealing flaps are so configurated wherein the folded ends thereof will be spaced so as to define therebetween a leak path. One of the front and rear sealing flaps will be provided with a bead of hot melt material which will be aligned with the leak path and when the sealing flaps are heat bonded together, the hot melt material will melt and fill the leak path.

Abstract: Disclosed is a carton stop assembly for use in a machine which performs operations on a carton blank, and which includes a rotatable hub carrying a plurality of spaced radial mandrels, and insertion mechanism for telescopically inserting a carton blank over one of the mandrels. The carton stop assembly includes a track parallel to the one mandrel, having plurality of detents spaced therealong. An axially-reciprocable shaft has a first end overlying the one mandrel, and a second end overlying the track. The shaft carries track-engaging members at its second end, which enclose the detents on the track thereby stopping the shaft at a plurality of detent positions. A carton-engaging bracket is carried on the first end of the shaft and is arranged to overlie the one mandrel. As the shaft is reciprocated to a number of detent positions, the carton-engaging bracket is also placed at a number of positions along the mandrel.

Abstract: A container defining an inner containment region and having means for positively sealing and opening at least one end to provide access to the containment region. An enclosure member is provided with at least one closure secured thereto for hinged movement adjacent to the opening, the closure being bi-directionally movable from a locked first position wherein the closure seals the container opening, through an intermediate position to a locked second position wherein the closure positively unseals the opening. The enclosure member resiliently deforms in coopertive interaction with the closure as the closure moves between the first and second positions, respectively, to aid further movement thereof from the intermediate position to either of the first locked closed positiion or the second locked open position. A method for manufacturing the container is also disclosed.

Abstract: An apparatus which produces a precisely shaped and positioned perforated line in a blank for a parallelepipedic package has a blade and a roller for pressing the blank against the blade. The blade is stationary relative to the packaging blank and provides a perforated line which does not penetrate the inner layer of the packaging material. The roller is mounted on a connecting bar which is linked to a reciprocating drive. The roller moves in a guide which positions the roller relative to the blade during each stroke of the reciprocating drive.

Abstract: A folding device for imparting a folding habit to the opened top of a carton comprises a frame which is connected to a shaft for moving the frame upwardly and downwardly. A pair of squeezing plates are secured to the frame. The squeezing plates have oppositely tapering lower portions and parallel upper portions. A deforming plate having oblique edges is movable between the upper portions of the squeezing plates and is connected to the frame by a resilient mounting which permits upward relative movement of the deforming plate with respect to the squeezing plates. The lower edge of the deforming plate includes upwardly and outwardly extending edges for spreading opposite edges of a carton. The squeezing plates are used to squeeze opposite sides of the carton together so that the carton top can ultimately be closed.

Abstract: In the manufacture of packing containers of the non-returnable type for, e.g., milk, the forming and closing of the ridgelike top of the filled packing container represents the final phase in the manufacture. The top is provided with sealing panels which are intended jointly to form a top fin on the closed packing container. The present invention relates to an arrangement for the processing of a packing container by compressing and sealing the top fin of the container. The arrangement includes two processing jaws which are movably suspended in spring elements and are movable symmetrically between an active position wherein the jaws contact the sealing fin and an inactive position wherein the jaws are spaced from the sealing fin.

Abstract: A carton bottom end tucker-tacker assembly for folding over, closing and tacking the bottom ends of a pair of cartons mounted on a pair of mandrels at a tucker-tacker station on a carton packaging machine. The tucker-tacker apparatus includes a tucker apparatus for engaging a pair of opposed triangular bottom end closure members on the bottom ends of each of a pair of stationary cartons and breaking the bottom end closure members and folding them inwardly toward a closed position, after which the tucker apparatus recedes and a pair of swingably mounted tucker and tacker jaws then move under the partially closed bottom end members of each of the pair of cartons and complete the folding and tucking operations, and concluding with a tacking in place of the bottom end closure tuck-over panel on each carton to retain the bottom end closure members in a square condition for subsequent transferral to a carton bottom end pressure sealing station.

Abstract: A method and an apparatus for making a fillet seam closure on folding boxes fabricated from box-board internally lined with aluminum foil and coated with a thermal plastic resin includes folding the fillet seam along a fold line, holding the areas of the fillet seam to be welded together by applying compressive forces along a line parallel to the desired weld seam and slightly spaced therefrom between the weld seam and the fold line and ultrasonically welding the fillet seam with a simultaneous application of pressure in the weld seam which gradually decreases from the weld seam center line to the edge facing the fold line to effect the displacement of the thermal plastic resin from the center line towards the edge in the formation of a V-joint. The weld is allowed to cool off and the compressor forces are maintained during the welding and the cooling operations.