WO2008146160A2 - Product in seal deflection device - Google Patents

Product in seal deflection device Download PDF

Info

Publication number
WO2008146160A2
WO2008146160A2 PCT/IB2008/001841 IB2008001841W WO2008146160A2 WO 2008146160 A2 WO2008146160 A2 WO 2008146160A2 IB 2008001841 W IB2008001841 W IB 2008001841W WO 2008146160 A2 WO2008146160 A2 WO 2008146160A2
Authority
WO
WIPO (PCT)
Prior art keywords
bag
sealing
product
tube
zone
Prior art date
Application number
PCT/IB2008/001841
Other languages
French (fr)
Other versions
WO2008146160A3 (en
WO2008146160A8 (en
Inventor
Michael Calvin Cecil
Xuan Pham
George Van Bergen
Original Assignee
Philips Morris Products S.A.
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
Application filed by Philips Morris Products S.A. filed Critical Philips Morris Products S.A.
Publication of WO2008146160A2 publication Critical patent/WO2008146160A2/en
Publication of WO2008146160A3 publication Critical patent/WO2008146160A3/en
Publication of WO2008146160A8 publication Critical patent/WO2008146160A8/en

Links

Classifications

    • 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
    • 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
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/7451—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 the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
    • B29C66/7373—Joining soiled or oxidised materials
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • 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
    • B29C66/81411—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • B29C66/81417—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 characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled being V-shaped
    • 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
    • B29C66/81431—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 comprising a single cavity, e.g. a groove
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B29/00—Packaging of materials presenting special problems
    • 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

Definitions

  • a device for a repetitive motion bagging machine that deflects a product from the seal zone of a bag prior to sealing the bag.
  • the device includes a product stopper for pinching the bag just below the sealing zone prior to sealing the bag.
  • the product stopper is located adjacent to a sealing element of a bagging machine.
  • the product stopper includes a spring loaded mechanism that is capable of pinching the bag.
  • the product stopper is set to pinch the bag prior to sealing and release the bag after the bag is sealed.
  • the product stopper includes an air assist mechanism that pinches the bag.
  • the product stopper may be mounted on the sealing element of a bagging machine.
  • the product stopper may include two opposing parts, each spring loaded or air assisted, that come together to pinch the bag when activated.
  • each of the opposing parts includes a pinching element having a spring loaded mechanism for pinching the bag proximal to the sealing zone.
  • the sealing element in an embodiment, also includes two opposing parts that converge on the sealing zone of the bag to form a seal.
  • one portion of a product stopper may be attached to each portion of the sealing element.
  • the sealing element is a heat sealing element that heat seals the sealing zone of a bag after the product stopper has pinched the bag to prevent a product from entering the sealing zone.
  • the sealing element is capable of forming a top seal of a first bag and a bottom seal of a second bag simultaneously, while the product stopper prevents the enclosed product from interfering with the seals.
  • the product stopper is made from a material selected from the group consisting of metal, plastic, wood, and combinations thereof.
  • the product stopper releases said first bag after the sealing element has formed the top seal.
  • the product stopper pinches the span of the first bag.
  • Figure 1 is a perspective view of an apparatus for filling and sealing bags, not including a product stopper.
  • Figure 2 is a perspective view of an apparatus for filling and sealing bags including a product stopper having a spring loaded mechanism.
  • Figure 3 is a front view of an apparatus for filling and sealing bags including a product stopper having an air assist mechanism.
  • Figures 4A, 4B, 4C and 4D are front views of an apparatus for filling and sealing bags including a product stopper.
  • Figure 5 is a side view of an apparatus for filling and sealing bags including a product stopper.
  • a repetitive feed vertical fill bagging machine 100 includes a sealing element 120 that seals a tube 200 at select locations to form at least a first bag 460 and a second bag 470. At set points along the tube 200, seals 250, 350 are formed at the sealing zone 150 by the sealing element 120 to form the bags 460, 470 as the tube 200 runs through the machine. Preferably, the bags are formed repetitively as the tube 200 runs through the machine.
  • a bagging machine includes multiple sets of sealing elements 120 for sealing the tube at set locations. Alternatively, the bagging machine includes a single set of sealing elements 120.
  • the tube that forms the bags is made of plastic.
  • the bag is made of paper or metal.
  • the bag is made of a permeable material.
  • the bag is made of an impermeable material.
  • the sealing element 120 seals the tube 200 at a sealing zone 150 at select points along the tube 200 to form a top seal 250 at the top 400 of a first bag 460 and a bottom seal 350 at the bottom 450 of a second bag 470.
  • the sealing element 120 forms the top seal 250 for the first bag 460 and the bottom seal 350 for the second bag 470 simultaneously.
  • the two simultaneously formed seals 250, 350 are preferably formed by a sealing element 120 that has at least two sealing surfaces.
  • the sealing element 120 is a heat sealer so that when the two layers of the bag are pressed together and heat is applied, a seal is formed.
  • the sealing element 120 is heated by a resistance heater. In another embodiment, the sealing element 120 is heated by convection.
  • the bagging machine includes a hopper that holds the loose product 300.
  • a nozzle descends from the hopper to just above the open tube 200.
  • the bagging machine is programmed to insert a fixed amount of the loose product 300 into the tube 200.
  • the product 300 may interfere with the sealing element 120 by entering the sealing zone 150 causing the bag to be only partially sealed.
  • a device for preventing loose product from interfering with a seal is provided.
  • the device 10 may be retrofitted onto an existing, traditional, sealing element of a continuous feed, vertical fill bagging machine, such as the sealing element 120 shown in Figure 1.
  • the device 10 includes a product stopper 14 that is adjacent to a sealing element 12 of a bagging machine.
  • the product stopper 14 is made of plastic. In another embodiment, the product stopper 14 is made of metal. In an embodiment, the product stopper 14 includes a mount 15 and a pinching element 37. Preferably, the mount 15 supports the pinching element 37 that pinches the tube 200 prior to sealing the bag.
  • the product stopper 14 is mounted onto a sealing element 12 of a continuous feed bagging machine by the mount 15.
  • the mount 15 of the product stopper 14 is bolted to the sealing element 12.
  • the mount 15 of the product stopper 14 is welded onto the sealing element 12.
  • the product 300 is a tobacco product.
  • the tobacco product is in its final form and ready to be packaged and shipped to consumers.
  • tobacco products include chewing tobacco or a pouched tobacco product.
  • the chewing tobacco or pouched tobacco products are inserted in the tube 200 for packaging in a set quantity.
  • the bagging machine has a hopper with a nozzle that ejects the set quantity of product into the tube 200.
  • the bagging machine with the product stopper 14 is used to make consumable pouch products such as a snus.
  • a permeable pouch material forms the tube 200, which in turn forms small bags when sealed at select locations.
  • a loose tobacco material is portioned and inserted into the tube above a bottom seal.
  • a top seal is then formed in the tube to form a pouched tobacco product.
  • the pouched tobacco product is sized for oral consumption and has dimensions of less than about 5cm (2 inches).
  • the bagging machine with a product stopper 14 is used to form a pouched, non-tobacco product.
  • the oral, non-tobacco product has dimensions of less than about 2 inches.
  • the pinching element 37 of the product stopper 14 is sized so that it can span the width of most tubes 200 that form the bags so that bags of varying sizes may be formed and sealed using the product stopper 14.
  • the pinching element 37 is designed to pinch the span of the tube so that no holes are left open through which the product may travel into the sealing zone 24 of a tube 200.
  • the pinching element 37 is designed to pinch only a portion of the span of the tube so that air can be released prior to sealing.
  • the pinching elements 37 are sized to allow air to release, but prevents product that may be initially entrained with the air from moving up and into the area to be sealed.
  • the pinching element 37 pinches the tube 200 at select locations along the span to prevent the loose product 300 from traveling into the seal zone 24.
  • the product stopper 14 includes a spring loaded mechanism 45 that pinches the first bag 20 just below the sealing zone 24 prior to sealing by the sealing element 12.
  • the product stopper includes two opposing parts, each spring loaded, that converge on an area proximal to the sealing zone 24 and pinch the substantial span of the tube 200 when activated.
  • the two opposing, spring-loaded parts are pinching elements 37.
  • each opposing, spring-loaded pinching element 37 is mounted onto the bagging machine by a mount 15.
  • the product stopper 14 includes a pinching element 37 with an air assist mechanism 70, as seen in Figure 3.
  • the product stopper 14 includes two opposing parts, each having an air assist mechanism that converges on the tube 200.
  • the two opposing parts are pinching elements 37 that pinch that tube 200.
  • the product stopper 14 is programmed to converge on the sealing zone 24 at set times or at set lengths along the tube 200.
  • the sealing element 12 also includes two opposing parts that converge on the sealing zone 24 of the bag to form a seal.
  • one portion of a product stopper 14 may be attached to each portion of the sealing element 12 by the mount 15.
  • the sealing element 12 also includes a cutting edge 16 that separates a bag after the open end of the bag is sealed. As the tube 200 advances, seals are formed at the top of the lower bag and bottom of an upper bag. Once the top seal is formed by the sealing element 12, the cutting edge 16 penetrates the tube 200 to separate the newly sealed bag from the remaining tube 200.
  • the sealing element 12 is a heat sealing element with opposing sides 11 , 13 that converge on a sealing zone 24 between a first bag 20 and a second bag 22.
  • the sealing element 12 forms the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22 simultaneously.
  • the sealing element 12 includes two opposing sides 11 , 13 each having two heating surfaces 700, 701 , 702, and 703 on each of the opposing sides 11 , 13 so that when the sealing element 12 closes on the sealing zone 24, the tube 200 is sealed at two points, creating the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22.
  • the sealing element 12 glues opposing sides of the bag together to form a seal.
  • the opposing sides of the bag are stapled together to form a seal.
  • the opposing sides of the bag are tucked and folded together to seal the bag.
  • a cutting edge 16 lies between each heating surface 700, 703 on one of the opposing sides 11 , and between each heating surface 701 , 702 on the second opposing side 13.
  • the second bag 22 takes the place of the first bag 20 to make room for the formation of additional bags.
  • a product stopper 14 is located adjacent to or mounted onto each sealing element 12.
  • a predetermined amount of the product 300 is fed into the tube 200.
  • the predetermined amount of the product 300 is fed into the tube 200 as the sealing elements 12 move from their lower, retracted positions "D" to their upper, retracted positions "A". As shown in Figure 4B, just before the sealing elements 12 fully arrive at their position
  • the pinching elements 37 close and pinch the bag at a location adjacent the sealing zone 24 just before the sealing elements 12 close on the tube 200 at the sealing zone 24.
  • the sealing element 12 also moves downwardly with the tube to position “B” as shown in Figure 4C.
  • the cutting element 16 severs the tube 200 at the sealing zone 24 between the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22.
  • the sealing elements 12 then retract to position "C” as shown in Figure 4D, releasing the tube, and allowing the first bag 20 to detach from the machine.
  • the sealing element 12 moves upwardly to position "D.” While the sealing element moves to and/or is in position "D,” product 300 has been or is placed in the tube.
  • the bagging machine includes pins 2, which indent the sides of the tube to form opposed creases prior to the formation of the top seal.
  • the action of the pins 2 reduces the volume of the bag, which tend to force the product 300 up into the sealing zone 24.
  • the stopper 14 is activated prior to the pins to prevent the product 300 from entering the sealing zone 24 just before sealing.
  • the stopper 14 may be activated after the pins have indented the sides of the tube.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Package Closures (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Abstract

A device 10 for deflecting a loose fill product from the seal zone of a bag 20 and sealing the bag is provided. The device includes a product stopper 14. The product stopper is adjacent to the sealing element 12 of a bagging machine. The product stopper includes a mount 15 that mounts the product stopper to a bagging machine and a pinching element 37 that pinches a bag proximal to a sealing zone 24 before the bag is sealed by the sealing element at the sealing zone. In one embodiment, the pincher includes a spring loaded mechanism 45 for pinching the bag proximal to the sealing zone. In another embodiment, the pincher includes an air assist mechanism for pinching the bag proximal to the sealing zone. A method of sealing a bag to prevent a product from entering a seal zone of the bag prior to sealing is also provided.

Description

PRODUCT IN SEAL DEFLECTION DEVICE
CROSS REFERENCE TO RELATED APPLICATION
This application claims priority under 35 U. S. C. §119(e) to U.S. provisional Application No. 60/924,795, filed on May 31, 2007, the entire content of which is incorporated herein by reference.
BACKGROUND
During filling and sealing of bags on high speed, repetitive motion bagging machines, loose products are inserted into a tubing that is sealed at one end to form the bottom of a bag. Once the tube is filled, the top of the bag must also be sealed.
It is common for the loose product being inserted into the bags, to migrate into the sealing zone, thereby interfering with the sealing element as the top seal is formed. As a result, the product may be lodged in the seal, causing a shorter shelf-life or loss of freshness. Additionally, bags with incomplete seals are not tamper proof.
Generally, bags with incomplete seals are not acceptable for shipping to stores. Therefore, there is a loss of time and money for bags that are improperly sealed.
Thus there remains a need in the art for a device for a repetitive motion bagging machine that deflects a product away from the sealing zone of a bag prior to sealing.
SUMMARY
Provided is a device for a repetitive motion bagging machine that deflects a product from the seal zone of a bag prior to sealing the bag.
In a preferred embodiment, the device includes a product stopper for pinching the bag just below the sealing zone prior to sealing the bag. Preferably, the product stopper is located adjacent to a sealing element of a bagging machine.
In a preferred embodiment, the product stopper includes a spring loaded mechanism that is capable of pinching the bag. Preferably, the product stopper is set to pinch the bag prior to sealing and release the bag after the bag is sealed. In another embodiment, the product stopper includes an air assist mechanism that pinches the bag.
In an embodiment, the product stopper may be mounted on the sealing element of a bagging machine. Preferably, the product stopper may include two opposing parts, each spring loaded or air assisted, that come together to pinch the bag when activated. Preferably, each of the opposing parts includes a pinching element having a spring loaded mechanism for pinching the bag proximal to the sealing zone. Likewise, the sealing element, in an embodiment, also includes two opposing parts that converge on the sealing zone of the bag to form a seal. Preferably, one portion of a product stopper may be attached to each portion of the sealing element.
Preferably, the sealing element is a heat sealing element that heat seals the sealing zone of a bag after the product stopper has pinched the bag to prevent a product from entering the sealing zone.
In an embodiment, the sealing element is capable of forming a top seal of a first bag and a bottom seal of a second bag simultaneously, while the product stopper prevents the enclosed product from interfering with the seals. Preferably, the product stopper is made from a material selected from the group consisting of metal, plastic, wood, and combinations thereof.
Preferably, the product stopper releases said first bag after the sealing element has formed the top seal.
Preferably, the product stopper pinches the span of the first bag.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of an apparatus for filling and sealing bags, not including a product stopper.
Figure 2 is a perspective view of an apparatus for filling and sealing bags including a product stopper having a spring loaded mechanism.
Figure 3 is a front view of an apparatus for filling and sealing bags including a product stopper having an air assist mechanism.
Figures 4A, 4B, 4C and 4D are front views of an apparatus for filling and sealing bags including a product stopper. Figure 5 is a side view of an apparatus for filling and sealing bags including a product stopper.
DETAILED DESCRIPTION
As seen in Figure 1, a repetitive feed vertical fill bagging machine 100 includes a sealing element 120 that seals a tube 200 at select locations to form at least a first bag 460 and a second bag 470. At set points along the tube 200, seals 250, 350 are formed at the sealing zone 150 by the sealing element 120 to form the bags 460, 470 as the tube 200 runs through the machine. Preferably, the bags are formed repetitively as the tube 200 runs through the machine. In an embodiment, a bagging machine includes multiple sets of sealing elements 120 for sealing the tube at set locations. Alternatively, the bagging machine includes a single set of sealing elements 120.
In a preferred embodiment, the tube that forms the bags is made of plastic. In other embodiments, the bag is made of paper or metal. In an embodiment, the bag is made of a permeable material. In another embodiment, the bag is made of an impermeable material.
The sealing element 120 seals the tube 200 at a sealing zone 150 at select points along the tube 200 to form a top seal 250 at the top 400 of a first bag 460 and a bottom seal 350 at the bottom 450 of a second bag 470. In an embodiment, the sealing element 120 forms the top seal 250 for the first bag 460 and the bottom seal 350 for the second bag 470 simultaneously. The two simultaneously formed seals 250, 350 are preferably formed by a sealing element 120 that has at least two sealing surfaces.
Preferably, the sealing element 120 is a heat sealer so that when the two layers of the bag are pressed together and heat is applied, a seal is formed. In an embodiment, the sealing element 120 is heated by a resistance heater. In another embodiment, the sealing element 120 is heated by convection.
Once the bottom seal 250 of the second bag 470 is in place, a loose product 300 is dropped into the tube 200 to fill the second bag 470. The bagging machine includes a hopper that holds the loose product 300. In an embodiment, a nozzle descends from the hopper to just above the open tube 200. Preferably, the bagging machine is programmed to insert a fixed amount of the loose product 300 into the tube 200. However, nothing prevents the loose product 300 from entering the upper sealing zone 150 of the bag 460 prior to sealing the upper end of the bag. Thus, the product 300 may interfere with the sealing element 120 by entering the sealing zone 150 causing the bag to be only partially sealed.
As such the freshness of the product 300 may be compromised. In addition, such bags may appear as if they have been tampered with and thus cannot be sold.
As described herein and shown in Figure 2, a device for preventing loose product from interfering with a seal is provided.
In a preferred embodiment, the device 10 may be retrofitted onto an existing, traditional, sealing element of a continuous feed, vertical fill bagging machine, such as the sealing element 120 shown in Figure 1.
Preferably, as seen in Figure 2, the device 10 includes a product stopper 14 that is adjacent to a sealing element 12 of a bagging machine.
In an embodiment, the product stopper 14 is made of plastic. In another embodiment, the product stopper 14 is made of metal. In an embodiment, the product stopper 14 includes a mount 15 and a pinching element 37. Preferably, the mount 15 supports the pinching element 37 that pinches the tube 200 prior to sealing the bag.
In one embodiment, the product stopper 14 is mounted onto a sealing element 12 of a continuous feed bagging machine by the mount 15. In an embodiment, the mount 15 of the product stopper 14 is bolted to the sealing element 12. In another embodiment, the mount 15 of the product stopper 14 is welded onto the sealing element 12.
In a preferred embodiment, the product 300 is a tobacco product. Preferably, the tobacco product is in its final form and ready to be packaged and shipped to consumers. Such tobacco products include chewing tobacco or a pouched tobacco product. Preferably, the chewing tobacco or pouched tobacco products are inserted in the tube 200 for packaging in a set quantity. Preferably, the bagging machine has a hopper with a nozzle that ejects the set quantity of product into the tube 200.
In another embodiment, the bagging machine with the product stopper 14 is used to make consumable pouch products such as a snus. Preferably, a permeable pouch material forms the tube 200, which in turn forms small bags when sealed at select locations. A loose tobacco material is portioned and inserted into the tube above a bottom seal. A top seal is then formed in the tube to form a pouched tobacco product. The pouched tobacco product is sized for oral consumption and has dimensions of less than about 5cm (2 inches). In another embodiment, the bagging machine with a product stopper 14 is used to form a pouched, non-tobacco product. The oral, non-tobacco product has dimensions of less than about 2 inches.
The bagging machine with a product stopper 14 is then used to place multiple pouched products in a larger bag for sealing. Preferably, the pinching element 37 of the product stopper 14 is sized so that it can span the width of most tubes 200 that form the bags so that bags of varying sizes may be formed and sealed using the product stopper 14. Preferably, the pinching element 37 is designed to pinch the span of the tube so that no holes are left open through which the product may travel into the sealing zone 24 of a tube 200. In another embodiment, the pinching element 37 is designed to pinch only a portion of the span of the tube so that air can be released prior to sealing. The pinching elements 37 are sized to allow air to release, but prevents product that may be initially entrained with the air from moving up and into the area to be sealed.
In an embodiment, the pinching element 37 pinches the tube 200 at select locations along the span to prevent the loose product 300 from traveling into the seal zone 24. in one embodiment, the product stopper 14 includes a spring loaded mechanism 45 that pinches the first bag 20 just below the sealing zone 24 prior to sealing by the sealing element 12. Preferably, the product stopper includes two opposing parts, each spring loaded, that converge on an area proximal to the sealing zone 24 and pinch the substantial span of the tube 200 when activated. In an embodiment, the two opposing, spring-loaded parts are pinching elements 37. Preferably, each opposing, spring-loaded pinching element 37 is mounted onto the bagging machine by a mount 15. In another embodiment, the product stopper 14 includes a pinching element 37 with an air assist mechanism 70, as seen in Figure 3. Preferably, the product stopper 14 includes two opposing parts, each having an air assist mechanism that converges on the tube 200. In a preferred embodiment, the two opposing parts are pinching elements 37 that pinch that tube 200. In an embodiment, the product stopper 14 is programmed to converge on the sealing zone 24 at set times or at set lengths along the tube 200.
In an embodiment, the sealing element 12 also includes two opposing parts that converge on the sealing zone 24 of the bag to form a seal. Preferably, one portion of a product stopper 14 may be attached to each portion of the sealing element 12 by the mount 15. In an embodiment, the sealing element 12 also includes a cutting edge 16 that separates a bag after the open end of the bag is sealed. As the tube 200 advances, seals are formed at the top of the lower bag and bottom of an upper bag. Once the top seal is formed by the sealing element 12, the cutting edge 16 penetrates the tube 200 to separate the newly sealed bag from the remaining tube 200. Preferably, the sealing element 12 is a heat sealing element with opposing sides 11 , 13 that converge on a sealing zone 24 between a first bag 20 and a second bag 22.
In a preferred embodiment, the sealing element 12 forms the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22 simultaneously.
In a preferred embodiment, the sealing element 12 includes two opposing sides 11 , 13 each having two heating surfaces 700, 701 , 702, and 703 on each of the opposing sides 11 , 13 so that when the sealing element 12 closes on the sealing zone 24, the tube 200 is sealed at two points, creating the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22.
In another embodiment, the sealing element 12 glues opposing sides of the bag together to form a seal. In another embodiment, the opposing sides of the bag are stapled together to form a seal. In yet another embodiment, the opposing sides of the bag are tucked and folded together to seal the bag.
Preferably, a cutting edge 16 lies between each heating surface 700, 703 on one of the opposing sides 11 , and between each heating surface 701 , 702 on the second opposing side 13. The cutting edge 16, located between the top seal 30 and the bottom seal 35, separates the first bag 20 from the second bag 22 as the bottom seal 35 of the second bag 22 and the top seal 30 of the first bag 20 are formed. Once the cut is made, the first bag 20 is then ready for packaging, while the second bag awaits filling and a top seal.
As the tube 200 advances through the machine, the second bag 22 takes the place of the first bag 20 to make room for the formation of additional bags. As shown in Figure 2, when the continuous feed vertical fill bagging machine is equipped with two or more sealing elements 12, a product stopper 14 is located adjacent to or mounted onto each sealing element 12.
Referring now to Figure 4A, as the sealing elements 12 are moved from their upper, retracted positions "A" to their upper, closed position "B", whereupon a new bag is closed and sealing action is initiated. While closed, the sealing elements 12 begin moving downwardly from their upper, closed position "B" to their lower, closed positions "C", drawing additional column of tubular bag material 200 with them. At the lower, closed positions "C", the bottom seal is fully formed and the knives 16 are actuated (closed) to sever away a newly formed bag. Thereafter, the sealing elements 12 retract from their lower, closed positions "C" to their lower, retracted positions "D" From there, they return to their upper, retracted positions "A". While the sealing elements 12 move into, through or beyond their lower, retracted positions "C", a predetermined amount of the product 300 is fed into the tube 200. Preferably, the predetermined amount of the product 300 is fed into the tube 200 as the sealing elements 12 move from their lower, retracted positions "D" to their upper, retracted positions "A". As shown in Figure 4B, just before the sealing elements 12 fully arrive at their position
"A," the pinching elements 37 close and pinch the bag at a location adjacent the sealing zone 24 just before the sealing elements 12 close on the tube 200 at the sealing zone 24. The sealing element 12 also moves downwardly with the tube to position "B" as shown in Figure 4C. Once in position "B," the cutting element 16 severs the tube 200 at the sealing zone 24 between the top seal 30 of the first bag 20 and the bottom seal 35 of the second bag 22. The sealing elements 12 then retract to position "C" as shown in Figure 4D, releasing the tube, and allowing the first bag 20 to detach from the machine.
Once the first bag 20 has been severed and detached, the sealing element 12 moves upwardly to position "D." While the sealing element moves to and/or is in position "D," product 300 has been or is placed in the tube.
As shown in Figure 5, in an embodiment, the bagging machine includes pins 2, which indent the sides of the tube to form opposed creases prior to the formation of the top seal. The action of the pins 2 reduces the volume of the bag, which tend to force the product 300 up into the sealing zone 24. In a preferred embodiment, the stopper 14 is activated prior to the pins to prevent the product 300 from entering the sealing zone 24 just before sealing. In other embodiments, the stopper 14 may be activated after the pins have indented the sides of the tube. While the foregoing has been described in detail with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications may be made, and equivalents thereof employed, without departing from the scope of the claims.

Claims

CLAIMS:
1. A device for deflecting loose fill product from a seal zone of a bag comprising: a product stopper adjacent to a sealing element of a vertical fill bagging machine, wherein said product stopper pinches a first bag proximal to a sealing zone prior to said first bag being sealed by said sealing element at said sealing zone to prevent a product from migrating into said sealing zone.
2. The device of Claim 1 , wherein said product stopper includes a mount and a pinching element.
3. The device of Claim 1 , wherein said product stopper includes at least two opposing members, each having a mount and a pinching element, that converge to pinch said bag proximal to said sealing zone.
4. The device of claim 3, wherein each of said opposing members includes a pinching element having an air assist mechanism that pinches said first bag proximal to said sealing zone.
5. The device of Claim 1 , wherein said sealing element includes a cutting edge proximal to said sealing element for separating said first bag from a second bag.
6. The device of Claim 1 , wherein the sealing element is a heat sealing element.
7. The device of Claim 1 , wherein said sealing element is configured to form a bottom seal of a first bag and a top seal of a second bag simultaneously.
8. The device of Claim 1 , wherein said product stopper has a width that is less than the width of said first bag.
9. The device of Claim 1 , wherein said product stopper has a width that is the same as the width of said first bag.
10. The device of Claim 1 , wherein said bag is made of a material selected from the group consisting of plastic, paper, metal, and combinations thereof.
11. A method of sealing a bag to prevent a product from entering a seal zone of said bag prior to sealing comprising: forming a tube; forming a bag along said tube; filling the bag with a loose product; pinching the tube at a location proximal to a sealing zone with a product stopper; and sealing the tube to form a sealed bag.
12. The method of Claim 11 , wherein seals are formed at a top of a downstream bag and a bottom of an upstream bag along the tube.
13. The method of Claim 11 , further including cutting said tube between seals to separate the tube into filled bags.
14. The method of Claim 11 , wherein the sealing is accomplished by a method selected from the group consisting of heat sealing, tucking and folding, gluing, stapling, and combinations thereof.
PCT/IB2008/001841 2007-05-31 2008-05-30 Product in seal deflection device WO2008146160A2 (en)

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US60/924,795 2007-05-31

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