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US20100199614A1 - Packaging machine for block bottom bags - Google Patents

Packaging machine for block bottom bags Download PDF

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Publication number
US20100199614A1
US20100199614A1 US12/665,023 US66502308A US2010199614A1 US 20100199614 A1 US20100199614 A1 US 20100199614A1 US 66502308 A US66502308 A US 66502308A US 2010199614 A1 US2010199614 A1 US 2010199614A1
Authority
US
United States
Prior art keywords
machine
carriage
jaws
jaw
bag material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/665,023
Other languages
English (en)
Inventor
Alfred Alexander Taylor
Michael Don Bray
Robert Erich Fritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TNA Australia Pty Ltd
Original Assignee
TNA Australia Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2007904567A external-priority patent/AU2007904567A0/en
Application filed by TNA Australia Pty Ltd filed Critical TNA Australia Pty Ltd
Assigned to TNA AUSTRALIA PTY LIMITED reassignment TNA AUSTRALIA PTY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRAY, MICHAEL DON, FRITZ, ROBERT ERICH, TAYLOR, ALFRED ALEXANDER
Publication of US20100199614A1 publication Critical patent/US20100199614A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B29C66/83513—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums cooperating jaws mounted on rollers, cylinders or drums and moving in a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B29C66/8491—Packaging machines welding through a filled container, e.g. tube or bag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306—Counter-rotating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8246—Servomechanisms, e.g. servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2056—Machines for packages of special type or form

Definitions

  • the present invention relates to packaging machines that form bags and more particularly but not exclusively to packaging machines that form bags to contain a product such as a food product.
  • Packaging machines receive a strip of bag forming material and pass the material about a former so that the bag material assumes a tubular configuration.
  • the material is longitudinally sealed, and product delivered to the interior of the tubular bag material through the former.
  • the sealing jaws then engage the tubular bag material to transversely seal and cut the bag material so as to produce bags containing the product.
  • U.S. Pat. No. 4,663,917 is a packaging machine that can form bags as discussed above.
  • the particular machine of this USA patent has sealing jaws that are rotatably driven through repeated revolutions in opposite angular directions.
  • Operatively associated with the sealing jaws are stripper bars and closer bars that strip the tubular bag material and close the tubular bag material to aid the jaws in forming the bags.
  • the stripper bars move down the tubular bag material to aid in reducing the volume occupied by the product.
  • the closer bars engage the tubular bag material above the stripper bars so as to provide a length of tubular bag material that is engaged by the jaws. This length of tubular bag material, by cooperation of the stripper bars and closer bars is free of any product thereby ensuring a good seal.
  • the sealing jaws have a blade that transversely cuts the tubular bag material so as to form the bags.
  • the above discussed machines typically form bags that taper in depth at each end.
  • bags that have a “block bottom”. That is a bag that has a longitudinal end formed so that the bag can stand on that longitudinal end on a shelf.
  • These bags are not formed by a rotary machine as described in the abovementioned USA patent. These are formed by vertically reciprocating machines in which the jaws are reciprocated vertically along a linear path, and also reciprocated horizontally along a linear path, with the jaws approaching each other and engaging the tubular bag material to form the bag ends. To form a “block bottom” bag movement of the tubular bag material through the machine is haltered.
  • These machines that are adapted to form block bottom bags have a number disadvantages including low production rates and complexity of the machinery since the jaws must be vertically and horizontally reciprocated. This horizontal and vertical reciprocation also makes the machines vulnerable to failure due to the accelerations imposed on the various components.
  • a packaging machine to form bags, containing a product, from tubular bag material into which the product is delivered, the tubular bag material being moved relative to the machine in a predetermined direction, said machine including:
  • a jaw carriage supported on the base for reciprocating movement generally parallel to said direction;
  • a pair of jaws mounted on the carriage and moved in unison to engage the tubular bag material to transversely seal the tubular bag material to form bags;
  • each shaft being operatively associated with a respective one of the jaws to drive the jaws, the shafts having longitudinally axes that extend generally transverse of said direction;
  • a jaw drive assembly operatively associated with the shafts to drive the shafts through repeated revolutions in opposite angular directions so that the jaws engage the tubular bag material;
  • a controller operatively associated with the drive assemblies to coordinate the assemblies.
  • said machine includes a pair of cooperating stripper bars, each stripper bar being operatively associated with a respective one of the jaws to move therewith to strip the tubular bag material.
  • said machine includes a pair of tube closer bars, each of the closer bars being operatively associated with a respective one of the jaws to engage the tubular bag material to close the tubular bag material.
  • said jaw drive assembly is mounted on said carriage.
  • said carriage drive assembly is a linear motor at least partly mounted on said base and at least partly mounted on said carriage, so that said carriage when reciprocated moves along a generally linear path.
  • each jaw is attached to its respective shaft by a jaw support.
  • each jaw support includes at least one arm extending generally radially relative to its respective shaft.
  • each jaw is fixed relative to its respective support.
  • each jaw is attached to its respective shaft by a support, with each jaw being mounted on its respective support for angular movement relative thereto about an axis generally transverse of said direction.
  • the jaws are attached by guides so that the jaws move in unison in opposite directions while facing each other.
  • the jaws are mounted on their respective supports for movement relative thereto in a radial direction.
  • said carriage includes a pair of generally parallel walls between which said shafts extend, and an end wall adjacent said base and including portion of said linear motor.
  • FIG. 1 is a schematic isometric view of a packaging machine
  • FIG. 2 is a schematic isometric view of the packaging machine of FIG. 1 ;
  • FIG. 3 is a schematic isometric view of a bottom isometric view of the packaging machine of FIGS. 1 and 2 ;
  • FIG. 4 is a schematic side elevation of the jaw mechanism of the packaging machine of FIG. 1 ;
  • FIG. 5 is a schematic end elevation of the jaw assembly of FIG. 4 , with the jaws in various positions;
  • FIG. 6 is a schematic side elevation of the jaws of FIG. 5 ;
  • FIG. 7 is a schematic end elevation of an alternative jaw assembly to that of FIGS. 4 to 6 ;
  • FIG. 8 is a schematic side elevation of the jaw assembly of FIG. 7 ;
  • FIG. 9 is a further schematic side elevation of the jaw assembly of FIG. 7 , with the jaws in various positions.
  • FIGS. 1 to 6 of the accompanying drawings there is schematically depicted a rotary packaging machine 10 .
  • the machine 10 would receive tubular bag material moving in the direction 11 .
  • the tubular bag material would be configured by a former (not illustrated).
  • Product is delivered into the interior of the tubular bag material, and then delivered to the machine 10 to form bags.
  • the machine 10 would also have a film drive assembly that moves the tubular bag material through the machine 10 .
  • Typical film drive units are disclosed in U.S. Pat. No. 4,910,943 and U.S. patent application Ser. No. 11/178150 (lodged on 8 Jul. 2005).
  • An example of a former assembly is described in U.S. Pat. No. 7,152,387.
  • the machine 10 has a base 12 providing a wall 13 that is generally vertically oriented. Mounted for vertical reciprocating movement adjacent the wall 13 is a jaw is carriage 14 . The jaw carriage 14 it reciprocates in the direction 15 , that is a direction generally parallel to the direction 11 . In this embodiment the direction 15 is generally vertical.
  • the carriage 15 includes a pair of side walls 16 that are generally parallel and coextensive and spaced transversely of the direction 15 .
  • the side walls 16 are fixed to and supported by an end wall 17 , the end wall 17 being generally vertically oriented and located adjacent the wall 13 .
  • a carriage drive assembly 18 Mounted on the wall 13 and end wall 17 is a carriage drive assembly 18 , the drive assembly 18 being an electric linear motor 19 including tracks 20 .
  • the tracks 20 are fixed to the wall 13 and engage bearings 21 fixed to the end wall 17 .
  • the tracks 20 and bearings 21 restrain the carriage 14 to reciprocate in the direction 15 .
  • the carriage 14 Upon electric power being delivered to the motor 19 , the carriage 14 is caused to reciprocate in a controlled manner.
  • the carriage 14 has vertical limits in respect of its movement, at which limits limit switches or stops 21 are engaged.
  • attached to the wall 13 would be the “stator” of the motor 19
  • attached to the wall 17 is the “rotor” 24 .
  • the motor 19 could be a “stepper” or “servo” motor or an induction motor.
  • the jaw assembly 20 could typically be the jaw assembly described in U.S. Pat. No. 4,663,917 (European Patent 0165819).
  • the jaw assembly 20 includes a pair of shafts 25 that are rotatably supported in bearings mounted in the walls 16 . Accordingly the shafts 25 extend generally transverse of the direction 11 , and therefore in this embodiment extends generally horizontal. As the shafts 25 are generally parallel, the shafts have generally parallel longitudinal axes 26 that are also generally horizontally oriented. Fixed to each of the shafts 25 is a jaw support 27 , which in this embodiment is an arm 28 that extends radially from its respective shaft 25 . At the radially outer end of each arm 28 is a sealing jaw 29 that would typically incorporate a blade to cut the bags from the tubular bag material. The sealing jaws 29 heat the tubular bag material to form the transverse seals in the tubular bag material. As best seen in FIGS.
  • the shafts 25 are illustrated in three positions, A, B and C. As can be seen from the drawings, the shafts 25 reciprocate vertically as they are mounted in the carriage 14 .
  • the arms 28 are rotated in synchronism in opposite rotational directions 30 and 31 , and are rotated through repeated revolutions in their respective directions.
  • the jaw assembly 22 is includes a pair of stripper bars 32 with which there is associated bag shields 33 .
  • the bars 32 and shields 33 are supported by pairs of levers 34
  • tube closer bars 34 are supported by pairs of levers 36 .
  • the levers 34 and 36 are pivotally mounted on a bracket 43 fixed to a respective one of the shafts 25 .
  • each jaw 29 As the arms 28 rotate about their respective axis 26 , each jaw 29 , relative to the carriage 14 , follows a circular path about the respective axis 26 .
  • the stripper bars 32 and closer bars 35 follow predetermined paths at least partly defined by the cam surfaces 37 and 38 .
  • the arms 28 are illustrated being rotated with the carriage 14 being maintained stationary. Accordingly the motor 23 has been activated to retain the carriage 14 stationary at a desired position relative to the base 12 .
  • the stripper bars 32 engage the tubular bag material and move down the tubular bag material to move the product towards the previously formed seal. Thereafter the tube closer bars 35 engage the tubular bag material and prevent further product passing down the tubular bag material towards the stripper bars 32 .
  • the stripper bars 32 and closer bars 35 separate so as to provide a strip of tubular bag material that is engaged by the sealing jaws 29 to form the transverse seal and to cut the formed bag from the tubular bag material.
  • the jaw assembly 22 behaves as illustrated in FIGS. 5 and 6 .
  • the shafts 25 are illustrated in three positions A, B and C.
  • the jaws 22 can move along a desired path.
  • the jaws 29 could be moved along a linear path 39 by the appropriate positioning of the carriage 14 , as well as the velocity of the carriage 14 and the acceleration of the carriage 14 , in combination with rotational speed of the shaft 25 .
  • the path 39 may be varied from a linear path again by proper coordination of the carriage 14 and the shafts 25 .
  • the machine 10 includes a jaw drive assembly 40 including an electric motor 41 that may be an induction stepper or servo motor.
  • the motor 41 drives gears 42 , which each of the gears 42 being drivingly connected to a respective one of the shafts 25 so that the shafts 25 are rotably driven through repeated revolutions in opposite directions.
  • the stripper bars 32 and closer bars 35 can be moved along an appropriate path, such as a linear path by co-ordination of the drive assembly 18 and drive assembly 40 .
  • the path is a linear path approaching the tubular bag material.
  • the carriage drive assembly 18 and jaw drive assembly 40 are electrically connected to a controller 43 (incorporating a computer) that delivers electric power to and controls the operation and coordination of the motors 19 and 41 so that a desired bag configuration is produced.
  • a controller 43 incorporating a computer
  • the carriage 14 can be selectively maintained stationary or can be reciprocated at a desired rate, and the shafts 25 rotated at the desired rate to provide bags of desired configuration.
  • FIGS. 7 to 9 there is schematically depicted a jaw assembly 50 that is a modification of the assembly 22 .
  • the shafts 25 are employed.
  • the devices 52 each include a jaw base 54 pivotally attached to a support 51 by a pivot 53 , so that each jaw base 54 is pivotally mounted on its associated shaft 25 .
  • the jaw bases 54 follow a circular path about their respective shafts 25 , however their orientation remains unchanged since the jaw bases are linked by one or more bars 58 that are slidably associated with the jaw bases 54 .
  • Each bar 58 extends between the jaw bases 54 . Accordingly as each shaft 25 rotates, each jaw base 54 rotates about its respective pivot 53 .
  • Each jaw base 54 has a jaw 55 as well as a stripper 56 and a closer bar 57 .
  • the bars 56 and 57 are slidably located in their respective bases 54 so that they are movable between an extended position (as shown in FIG. 7 ) and a partly retracted position as shown in FIGS. 8 and 9 .
  • the bars 56 engage the tubular bag material to strip the bag material, while the bars 57 close the bag material to thereby provide an area that is engaged by the sealing jaws 55 .
  • FIG. 8 there is schematically depicted the assembly 50 in operation with the carriage 14 stationary. Accordingly the bases 54 follow a circular path.
  • FIG. 9 there is schematically depicted the assembly 50 of FIG. 7 , with the carriage 14 being reciprocated to vertically move the shafts 25 so that “block bottom” bags are is formed.
  • the jaws 54 are shown in three positions, A, B and C.
  • movement of the carriage 14 can be governed and coordinated with rotation of the shafts 25 so that the jaws 55 move along a generally linear path when stripping and closing the tubular bag material and generally up until when the jaws 55 engage the tubular bag material to form a seal and separate the bag being formed.
  • the jaws 29 or 55 follow generally circular paths relative to the base 12 .
  • the carriage 14 is reciprocated vertically in a coordinated manner with the rotation of the shafts 25 , so that the jaws move along a linear path or a slightly curved path when approaching the tubular bag material to strip and seal the tubular bag material.
  • the path along which the jaws 29 and 55 pass is determined by the controller 43 that is “programmed” by an operator.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Making Paper Articles (AREA)
  • Basic Packing Technique (AREA)
US12/665,023 2007-08-23 2008-07-14 Packaging machine for block bottom bags Abandoned US20100199614A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2007904567A AU2007904567A0 (en) 2007-08-23 A packaging machine
AU2007904567 2007-08-23
PCT/AU2008/001028 WO2009023894A1 (en) 2007-08-23 2008-07-14 Packaging machine for block bottom bags

Publications (1)

Publication Number Publication Date
US20100199614A1 true US20100199614A1 (en) 2010-08-12

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US12/665,023 Abandoned US20100199614A1 (en) 2007-08-23 2008-07-14 Packaging machine for block bottom bags
US13/893,268 Abandoned US20130337988A1 (en) 2007-08-23 2013-05-13 Packaging machine for block bottom bags

Family Applications After (1)

Application Number Title Priority Date Filing Date
US13/893,268 Abandoned US20130337988A1 (en) 2007-08-23 2013-05-13 Packaging machine for block bottom bags

Country Status (5)

Country Link
US (2) US20100199614A1 (pt)
EP (1) EP2181042A4 (pt)
JP (1) JP2010536607A (pt)
BR (1) BRPI0813403A2 (pt)
WO (1) WO2009023894A1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10131106B2 (en) 2012-12-21 2018-11-20 Tna Australia Pty Limited Packaging machine former
US11312517B2 (en) * 2019-06-13 2022-04-26 Tna Australia Pty Limited Assembly for forming bags

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0813403A2 (pt) * 2007-08-23 2014-12-30 Tna Australia Pty Ltd Máquina de embalagem para sacos com um fundo reforçado
DE102013217548A1 (de) * 2013-09-03 2015-03-05 Robert Bosch Gmbh Horizontalquersiegelstation
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BRPI0813403A2 (pt) 2014-12-30
JP2010536607A (ja) 2010-12-02
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EP2181042A4 (en) 2013-09-11
US20130337988A1 (en) 2013-12-19

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