Abstract: A combined machine to make laminar separators of products contained in boxes and crates, specially designed to make the separators made of at least two laminar sheets of paper that are bound together by an adhesive bond.

Abstract: A method and apparatus for forming packages including articles enclosed between first and second continuous paper sheets having their edges joined by a thermally-activated adhesive, wherein the first and second continuous paper sheets are heated while subjected to a longitudinal tension.

Abstract: A heating unit for heating a continuous web, includes a heating roller rotating about an axis of rotation and having an outer surface comprising a pattern of thermally conductive areas and thermally insulating areas, and at least one induction heater electromagnetically coupled to the thermally conductive areas of the outer surface of the heating roller.

Abstract: A device (10) for sealing three-dimensional objects (16) in the bag opening (14) of a film bag (12) comprises a clamp (36, 38) for the film bag (12), which has a pair of clamping shoes (42, 44) on each side, between which the edge of the film bag (12) is held. A heat sealer (26, 28) is provided for sealing the three-dimensional object (16) in the bag opening (14) of the film bag (12), wherein the heat sealer (26, 28) has a pair of sealing jaws (26, 28) between which the bag opening (14) of the film bag (12) can be sealed. The two clamping shoe pairs (42, 44) of the clamp (36, 38) are moved apart from one another during the sealing process.

Abstract: A vertical bag-making/filling/packaging machine (1) comprises: a film supplying portion (5) which lets out a film (F) from a roll (Fr); a bag-making guide (31) which folds the film (F) into a tubular shape and changes a conveying direction downward; a vertical sealing portion (60) which thermally seals side edges of the film (F) to each other in an up-down direction so as to make the film into a tubular shape; a film conveying portion (50) which conveys the film (F) downward; a filling portion (70) which loads a content (X) into an interior of the film (F); a lateral sealing portion (80) which thermally seals the film (F) in a left-right direction so as to make a bag body; a square-bottom sealing portion (90) which expands a bottom of the bag body to a rectangular shape from an inside and then thermally seals the bottom to form a rectangular bottom surface; and a cutter (89) which cuts off the bag body from the film (F).

Abstract: Provided are a method and an apparatus for extruding into a tube and filling the tube at a high speed and simultaneously sealing the tube. Specifically provided is a method for producing a polymer tube, containing a liquid therein and being sealed at constant intervals, the method including an extrusion step of continuously melt-extruding a polymer material through a die into at least one tube, while feeding a liquid into the tube to obtain at least one liquid-containing tube; and sealing step of discontinuously pressing the at least one liquid-containing tube between a pair of pressurizing members at constant intervals to cause pressure-bonding before the tube solidifies, while continuously taking up the extruded tube.

Abstract: A spring system that includes a compressible material that is used to control the speed of the rod movement.

Abstract: An improved method and apparatus for making a multi-compartment package on a form, fill, and seal machine. Two pairs of heat sealing jaws are provided below a product delivery tube.

Abstract: A vertical bag-manufacturing and packaging machine includes a feeding unit having an upstream tube portion, an opening/closing mechanism, and a downstream tube portion. The upstream tube portion is configured and arranged to downwardly convey the article. The opening/closing mechanism is disposed on a downstream side of the upstream tube portion with a gap being formed between a downstream end of the upstream tube portion and an upstream end of the opening/closing mechanism, and configured and arranged to selectively open or close to selectively discharge or hold the article discharged by the upstream tube portion. The downstream tube portion is disposed on a downstream side of the opening/closing mechanism, and configured and arranged to downwardly convey the article discharged by the opening/closing mechanism, the downstream tube portion having an internal diameter that is larger than an internal diameter of the upstream tube portion.

Abstract: A packaging and filling machine is capable of easily preforming with the forming flaps by keeping the pressure of the filled liquid food in the tube the positive pressure, capable of preventing the pressure of the liquid food from dropping to negative pressure, even if the pressure of the liquid food decreases due to the up-and-down of the liquid food pressure, and capable of preventing outside atmosphere materials from invading into the tube. A positive pressure keeping means absorbs fluctuation of the pressure of the liquid food in the tube below the pressure flange, and prevents the liquid food pressure from dropping in negative pressure to keep the pressure of the liquid food in the tube below the pressure flange a positive pressure.

Abstract: A method is described for sealing a continuous tubular packaging (20), which is fed in a vertical direction, the continuous tubular packaging (20) being shaped as a continuous tubular element (20) exhibiting with a closed bottom (5), in which products are contained, and a group (1) for actuating the method. The group (1) comprises: sealing means (4), configured such as to act in a transversal direction with respect to the continuous tubular packaging (20) in order to separate an inner volume thereof, such that a closed stick pack (2), containing said products, and a new closed bottom (5) are formed; and compression means (8, 9) arranged downstream of the sealing means (4) with respect to the feeding direction (W) of the continuous tubular packaging (20), which are configured such as to compress the continuous tubular packaging (20), consequently eliminating air fluid contained therein, and which are activatable prior to sealing the continuous tubular packaging (20) with the sealing means (4).

Abstract: The invention is a waste disposal system, particularly constructed to package and collect feminine hygiene and sanitary products, which creates an airtight containment space by use of paired arms which simultaneously seals and feed a continuous, plastic tube type bag fed through the apparatus.

Abstract: A composite air and foam protective packaging product comprises a packaging cushion having, in cross-section, at least three plies of plastic film, foam between a first ply and a second ply of the three plies of plastic film, and air between the second ply and a third ply of the three plies of plastic film.

Abstract: Disclosed is a device for automatically wrapping medicine which is hard to eat or food stuff in a unit which is convenient to eat, and also crushing fruits, vegetables and the like and automatically wrapping crude juice extracted from the crushed fruits and vegetables into a capsule. According to this, a user does not have to make an excessive amount of capsule products at one time and preserve the products for a long time even passing a proper expiration date. Thus, the automatic wrapping device is very useful in that the user can directly crush and eat food and medicine as desired and the capsule products can be kept fresh.

Abstract: Tandem, vertically-aligned vertical form, fill, and seal (VFFS) assemblies enable a method for manufacturing an ingredient package. An inner ingredient-bearing package is manufactured by a first superior VFFS assembly, which inner package is then downwardly displaced to a second inferior VFFS assembly. The inner package and a second ingredient are deposited (filled) into an open-ended outer packaging material being formed by the inferior VFFS assembly. After deposing the inner package and the second ingredient into the formed outer package, the outer package and inner package are sealed to one another at superior ends thereof to finally form an ingredient package. The finally formed package may be removed from partially formed packages in superior adjacency thereto. The finally formed package compartmentalizes the first and second ingredients for later consumer consumption.

Abstract: A bag packaging machine with vertical intermittent operation, which has a sealing station for the opposite pair of films that form the bags, in which two sealing plates operate in opposite position with respect to the symmetrical vertical axis Y-Y of the machine, which are supported with possibility of free sliding by corresponding frames fixed to free shafts that extend from the back to the front of the machine with forward inclination towards the front of the machine.

Abstract: A method and apparatus for making a foam-in-place cushion in which a foam-forming composition is dispensed between two plastic film portions in a predetermined fashion to selectively control the distribution of the foam in the cushion. A foam dispenser can be moved in a transverse direction as foam is dispensed. A dispersion device can be employed to apply pressure on predetermined areas of the film portions towards each other so as to cause the composition to be redistributed in position in a predetermined manner while the composition is in a less than fully expanded state. The plastic film can then be sealed closed to form an expanding foam cushion that can be placed into a shipping carton where the cushion expands to fill void space, or into a mold where the cushion expands and is molded into a desired shape.

Abstract: A method for manufacturing bag packages, in which netting material of bags to be formed is connected to at least two foil strips which are each provided with a printing repeating in the longitudinal direction of the strip, with the foil strips being supplied in a coupled manner from one stock. The foil strips are preferably obtained from a foil stock comprising a single strip of foil with at least two repeating printing patterns with concurrent repeat which are applied next to each other, with the single strip being divided into sub-strips each bearing a repeating printing pattern.

Abstract: Various embodiments and alternatives for vertical form fill and seal methods and apparatus are disclosed. In particular, two sheets of web are fed by forming collars to a fill tube (or in some embodiments, side by side fill tubes) wherein the sheets of web are wrapped approximately 180 degrees around the periphery of the fill tube. Zippers can be provided mounted transversely on the first sheet of web, mounted in the machine direction on the first sheet of web, or fed as a continuous length between the two longitudinal edges of the two sheets of web. Additionally, some embodiments fill side by side bags from a single fill tube. Other embodiments fill side by side bags from side by side fill tubes.

Abstract: This is a double acting, multi-lane machine and method for the forming, filling and sealing of plastic or paper film pouches of various sizes commonly used to hold liquid viscous, dry, particulated or powdery materials or other substances. The machine includes a four roll film dispensing station, a multi unit pump or dispensing station, one of each double acting stations such as side seal station, pull wheel station, cross seal station, and cross cut station. The invention provides for production of a multitude of pouches in a manner of two sets of two films allowing to double the production output of current machinery without any change to cycle time or increase of operational time. Coordination and movement of the various stations is accomplished through electronic computer control, working in conjunction with multiple motion controlling devices such as servo motors, air cylinders, belts, linkages and the like.

Abstract: A form-fill-seal machine for making a pouch style package is provided, comprising an optional bulge forming station for forming a puff or bulge; a heating and filling station for creating seals and filling the pouch; and an optional flap making station comprising a mechanism for folding over a flap and sealing the inside portion of the flap to the front face of the pouch.

Abstract: Machine for manufacturing mesh bags from a continuous roll of tubular mesh, and for filling and closing said mesh bags, which comprise an expansion device which is perimetric to the tubular mesh, the core expander of which is equipped with a vertical aperture which, as if it were a slot, traverses said core expander and connects the two frontal faces thereof and extends from its base to an intermediate point, for which the core expander adopts an inverted “U” shape, the machine also being fitted with preventive welding means, adapted for partially welding the two frontal faces of the tubular mesh and, as the case may be, the adjoining laminates of thermally weldable material through the aperture of the core expander; a traction device which drags a section of the tubular mesh provided with a bottom; conveyor means; and second and third filling and closing stations, respectively, both being arranged linearly.

Abstract: A form-fill-seal machine for making a pouch style package is provided, comprising an optional bulge forming station for forming a puff or bulge; a heating and filling station for creating seals and filling the pouch; and an optional flap making station comprising a folding mechanism for folding over a flap and sealing the inside portion of the flap to the front face of the pouch.

Abstract: In order to be able to realize complicated jaw movements in a device for welding of a foil tube, comprising two welding jaws, which can be moved opposingly and clamp the foil tube between one another, whereby a linear motor is provided as the jaw drive, it is suggested that the gearing houses a cam plate connected to a movable part of the linear drive, that the cam plate has two separate curves, and that each one cam connected to a jaw carrier is guided along a curve.

Abstract: A fluid dispenser generally includes a housing and a valving rod disposed in and movable within the housing, the valving rod including a central bore, at least one inlet for receiving a cleaning fluid composed of a solvent and a gas, and one or more outlet ports in fluid communication with the bore, wherein the outlet ports are capable of directing cleaning fluid radially outwards from the bore and against an interior surface of the dispenser to facilitate the removal of at least a portion of any fluid product or derivatives thereof that may be in adherence with such interior surface.

Abstract: A device for wrapping an article, the device comprising a first feeder for a first sheet of plastics film, a second feeder for a second sheet of plastics film, a carriage for positioning the article between the first and second sheets of plastics film and a sealing mechanism for sealing the first and second sheets of plastics film together adjacent the periphery of the article.

Abstract: A packaging machine including a seal bar assembly for bonding layers of polymeric material together about a wrapped product to form an airtight package seal comprises a length of SILVERSTONE encapsulated, flat electrical resistance heating ribbon disposed upon a rigid seal bar having a smooth face surface. The seal bar is preferably constructed of thermally conductive and electrically insulating materials, such as virgin TEFLON. The heating ribbon is mounted onto the seal bar under nearly constant tension throughout its temperature range. Low resistance electrical leads provide a path for supplying electricity to the heating ribbon. A silicon rubber-backed seal bar mating assembly for providing pressure to the polymeric materials during bonding is disclosed.

Abstract: A high speed vertical form, fill and seal packaging machine has a dual pump pouch-filling system, adjustable packaging material roll holders and side-seal jaws that are longer than pouches being formed in the machine, and which move with the packaging material traveling through the machine. Packaging material is moved in a semi-continuous manner and has side seals formed therein that are slit by a slitter system and pulled downwardly by a multi-jaw, rotary cross-seal system. After being completed, the formed pouches are cut off by a reciprocating or rotary cut-off system.

Abstract: A dual chamber sachet with a dispensing outlet can be made in a form/fill sequence by attaching the dispensing outlet to the film that is to form the chamber divider wall followed by attaching films that are to form the outer walls of the sachet to the dispensing outlet. The upper and side lateral edges of the sachet then are sealed together to produce a sachet with an open bottom end. The sachet can be produced from three film sources, two film sources with the outer walls being formed from a single film, or from a single film formed into a W-shape. The sachet preferably is filled through the open bottom end and the bottom end then sealed. However the sachet can be top filled through the nozzle. The sachets then are severed one from the other by cutting along a lateral seal and packed into a carton, or preformatted along a lateral seal and cut to produce a string of a set number of sachets. The sachets can have a single use dispensing outlet or a reclosable dispensing outlet.

Abstract: A system for providing dunnage to packages as the packages are formed is disclosed. The system includes a dunnage forming machine having a work station for inflating and sealing plastic pouches to form dunnage units. An accumulator is positioned below the station for receiving and collecting such units as they are formed. The accumulator includes an outlet opening laterally offset from the station. A pair of counter rotating brushes having axes journaled in spaced relationship are mounted at the outlet. Each of the brushes includes circumferentially spaced bristle sets defining unit receiving spaces between adjacent sets. A motor drive is operably connected to the brushes for causing counter rotation. A unit volume sensor is provided for emitting a machine start signal when the volume of units in the accumulator reaches a predetermined low volume. A process for providing dunnage in packages being formed is also disclosed.

Abstract: The present invention is an automated and integrated method and apparatus for packaging, loading, storing, and/or retrieving a specified product. A preferred embodiment of a system comprises a packager, a feeder device, a magazine, an unloading device, and a control unit. The packager is adapted to package a predetermined quantity of a product in a package. The feeder device has a loading screw which engages the package and transfers it to a storage screw in the magazine. The magazine preferably comprises multiple horizontal rows of storage screws. Each horizontal row of storage screws may be individually rotated about a central axis of the magazine. The control unit maintains a data base of the location and contents of each package in the magazine. The unloading device is adapted to retrieve a desired package from the magazine. The unloading device then transfers the desired package to a predetermined location such as a tote, bin, or patient specific drawer.

Abstract: In a heat seal device of a filling and packaging machine, wherein a continuously fed film F is vertically sealed by a vertical seal mechanism 19 and the laterally sealed by lateral seal mechanisms 20, 21, contents W, W1, W2 are filled in the film formed in the bottomed cylindrical shape and, while the film F is fed, a portion of the film F which forms a bag opening part side is sealed laterally by the lateral seal mechanisms 20,21 for continuously packaging as pouches P, the vertical seal mechanism 19 comprises a pair of rotating shafts 25 incorporating heaters H and mounted rotatably and two pairs of vertical seal rolls 31, 34 which are mounted in pairs on the rotating shafts 25 with a given distance in the axial direction of the rotating shafts 25 and have seal portions 30,35 protruded in a flange shape around outer peripheral portions thereof respectively, the heaters H incorporated in the rotating shafts 25 are disposed movably along the axial direction of the rotating shafts 25 with the position of the h

Abstract: A cutter cleaning apparatus for a filling machine which prevents liquid food adhering to the cutting knife from dirtying cut ends of packaging material. A web-shaped packaging material is continuously sealed in the longitudinal direction thereof to be formed into a tubular shape, a liquid food is charged into the tubular packaging material (11), and the tubular packaging material (11) is nipped from opposite lateral sides at a position below the surface of the liquid food, so that a laterally sealed portion (S) is formed. Subsequently, the laterally sealed portion (S) is cut in order to obtain an original-shape container. The cutter cleaning apparatus includes a cutting knife (21) for cutting the laterally sealed portion (S), and cleaning medium supply means for supplying a cleaning medium to the tip end of the cutting knife (21).

Abstract: A funnel for a form-fill-seal (FFS) machine configured to make transverse-zippered reclosable packages from a continuous supply of thermoplastic film having a plurality of zipper strips transversely sealed thereto at package length intervals is provided. The funnel includes a lower surface a contoured to keep the zipper profiles substantially parallel to each other as the thermoplastic film is fed over the FFS machine forming collar and folded around the FFS machine filling tube. A method and apparatus for making transverse zippered reclosable packages is also provided.

Abstract: An apparatus for air and liquid-tight packing of objects for disposal, such as sanitary towels, disposable nappies, hypodermic needles and other hospital wastes comprises a pair of supply rolls of mutually adhesive foil strips. The side edge of the foil strips are urged towards each other to seal the respective side edges together while a transport system engages the side edges and moves the foil strips through the apparatus. A pressing system includes a pair of substantially flat elements, at least one of which is rotatable, which extend substantially over the width of the foil strips and guide the strips together capturing and sealing an object to be packed therebetween, and sealing the foil strips together across their width after passage of the object.

Abstract: A film for a multiple bag which film is a multiple film comprising at least two sheets of film put one on another and having scattered along its both-side edge portions spot-fused portions by which the at least two sheets of film is partially united.

Abstract: A multiple compartment package having a connecting bridge with a frangible internal barrier is made from two composite or thermoplastic sheets or webs welded together to form the front and back walls of the package, and the central bridge portion is defined by one or more partitions spanning the short distance between the webs. In the preferred embodiment, multiple partitions form a plurality of parallel compartment strips to create an obstruction to penetration of substances from one packet to the other. One process for making the invention uses a comb-shaped mask and a thermoplastic insert strip interwoven between the tines of the comb. The tines are extended down between the welding heads of the packaging machine, preventing welding from taking place between the thermoplastic sheets wherever the comb mash is, with the result that the welding occurs between the strip and an alternating one of the side webs creating a zig-zag pattern that forms the vacant barrier compartments.

Abstract: An improved instrumentation and method for manufacturing from film wrapping material hermetically sealed packages containing an untangled, unknotted segment of flaccid filament, and packages produced by the instrumentation and method. Instrumentation improvements include a gripper assembly for impeding uncut filament from backing up during filament loading in the course of package construction, an improved piston also impeding filament backup and facilitating deposition of a filament segment into an open package compartment, and a sealing mechanism for superimposing a seal over the top and bottom package seals.

Abstract: A sanitary fill tube assembly includes a pair of large diameter fill tubes connected to a spreader having a rotary valve system mounted therein. The rotary valve system is actuated by pairs of actuator arms guided through openings in a manifold connected to the fill tubes to precisely move the rotary valve between open and closed position. The rotary valve includes elongated openings therein which are closely matched with and connected to the same size and shape passageways and discharge openings in the spreader so as to more accurately control and meter material being fed into a pouch, and to maintain the overall assembly in a sanitary condition.

Abstract: Method of and apparatus for cutting and heat sealing a film with a smooth seam which extends substantially the transverse width of a wrapped package utilizes a mechanism having a cool clamping portion and a hot sealing portion which are sequentially actuated. The clamping portion, with segments upstream and downstream of a sealing position, is activated to firmly hold the film against a base plate. The sealing portion is located between the upstream and downstream segments of the clamping portion. The heated sealing portion is brought into contact with the film as a cutting member cuts the film. The sealing head is retracted as the clamping portion holds the film to allow longitudinal film shrinkage and prevent transverse film shrinkage of the film. The clamping portion separates and the next package in a succession of film-enclosed packages is moved downstream of the sealing position.

Abstract: A bag maker bends an elongated bag-forming film into a tubular shape, moves it longitudinally along a path, seals its mutually overlapping side edges into a tubular shape, fills it with articles to be packaged and simultaneously seals it transversely with a transverse sealer to make individual filled bags. The transverse sealer has a pair of seal jaws opposite each other across the path of the film, each adapted to move in a D-shaped closed trajectory and inwardly towards each other to transversely seal the film over a seal area. A pair of shutters is disposed on the seal jaws so as to each move behind corresponding one of the seal jaws when moving downward. These shutters are biased inward towards each other and normally protrude inwardly from the inward-facing surfaces of the seal jaws so as to prevent articles intended for the next bag to be produced will not be caught between the seal jaws when transverse sealing is effected.

Abstract: A cutoff assembly for a form, fill and seal packaging machine having a fixed blade and a floating movable blade. The movable blade is adjustable horizontally with respect to the machine and the fixed blade so as to accurately cut off formed pouches, passing downwardly, in the vertical direction, through the machine.

Abstract: A cross-sealing device for a tubular-bag packaging machine operable with stripping rods moved along the plastic foil tube to be sealed, which stripping rods assure that the sealing surfaces are free of packaging material prior to the sealing task. A drive is provided for the stripping rods which is mechanically robust and makes it possible to adapt the stripping paths on the plastic foil tube to the special requirements. Belt drives are provided for this purpose which are driven independently of the cross-sealing jaws and are controlled by a position controller controlling the position of the stripping rods.

Abstract: An apparatus for packaging granular materials, wherein the granular material flows vertically through various components, wherein the apparatus comprises a frame, a plurality of servo driven packaging payout means, a plurality of packaging material alignment means, granular material filler means, sealing means, and severing means. The apparatus further comprises a computer controlled coordination means for controlling and coordinating the operations performed by the components of the apparatus.

Abstract: A travelling two-ply web of infusion packages (11) is cut transversely by rotary cutting device (50) to form individual packages (1) which are attached to a styrene cover web (70). The packages 91) and web (70) are fed at the same speed rotary attachment device (100) comprising heated welding tips (102) cooperating with an anvil roller (90). The web (70) is fed to the attachment device at constant speed, but the packages (1) are accelerated up to the speed of the web (70) by accelerating rollers (62, 63) which grip the sealed edges of the packages. This introduces the necessary gap between successive packages. A hinge line (5) is produced in the web (70) by hinging device which facilitates folding of the cover and the package when the web carrying attached packages is cut into individual lengths.

Abstract: A pouch for holding viscous food product for dispensing from a specific hand held or similar type dispenser, is formed so as to include a tear strip to open a funnel-shaped, centrally disposed outlet spout formed to be sealingly held in the specific dispenser. The pouch includes a pair of alignment/holding openings formed on either side of the outlet spout for securing the pouch in a fixed position in the dispenser. The invention also includes head seal tooling having a pair of heated jaws which are brought together to simultaneously form the bottom seal of a top unfilled, pouch and the outlet spout and angularly disposed top seals of a filled lower pouch, while at the same time forming perforations for the tear strip, the pair of openings in the lower pouch and cutting-off the formed, filled and sealed lower pouch from the upper pouch.

Abstract: A multiple bag forming and filling apparatus and method utilizes a plurality of filling tubes which have a cross-sectional width in the range from one-third to one times the width of the tubular preform between the vertical seals at the filling tube means. There is also disclosed the directing of horizontally adjacent vertical tubular bag preforms to opposite sides of a center sealing bar prior to forming transverse seals by movable seal bars on the opposite sides. The horizontal displacement of the horizontally adjacent bags prevents the adjacent bags from being sealed together.

Abstract: The invention relates to a stripper mechanism for a tubular bag packaging machine, in which a foil strip (1) is formed into a tube (3) by means of a longitudinal sealing jaw (2) and is formed into bags by means of cross-sealing jaws (4). A stripper mechanism (5) is arranged in the area of the cross-sealing jaws (4), which stripper mechanism (5) includes two stripper rods (6) supported on the end areas of support arms (7). In order to provide a drive for the stripper mechanism (5), which drive is independent of the drive of the cross-sealing jaws (4), the stripper rods (6) are connected to a common closing mechanism (8), and that furthermore the stripper rods are connected to a moving mechanism (9) for effecting a relative movement along the foil tube (3).

Abstract: An arrangement for enveloping an object located between two heat weldable webs of enveloping material includes two coacting welding jaws for joining the webs together in their transversal direction on mutually opposite sides of the object. The welding jaws extend in the transverse direction of the webs, across the whole width thereof. One of the jaws is a wire-carrying jaw which supports a freely extending heating wire, and the other jaw is forked and has two legs. The jaws are moveable between a starting position on opposite sides of the webs, and a web welding position in which the webs are held together with the free ends of the fork legs in abutment with one side of the webs and with the heating wire located at the mouth region of the fork gap and in abutment with the other side of the webs. The wire functions to weld said material webs together and to melt-off the webs within the weld region.

Abstract: Machine for manufacturing mesh bags from a continuous roll of tubular mesh, and for filling and closing said mesh bags, which comprise an expansion device which is perimetric to the tubular mesh, the core expander of which is equipped with a vertical aperture which, as if it were a slot, traverses said core expander and connects the two frontal faces thereof and extends from its base to an intermediate point, for which the core expander adopts an inverted “U” shape, the machine also being fitted with preventive welding means, adapted for partially welding the two frontal faces of the tubular mesh and, as the case may be, the adjoining laminates of thermally weldable material through the aperture of the core expander; a traction device which drags a section of the tubular mesh provided with a bottom; conveyor means; and second and third filling and closing stations, respectively, both being arranged linearly.