EP1608556A2 - Systeme et procede permettant de former un plateau integre pour emballage sous vide - Google Patents

Systeme et procede permettant de former un plateau integre pour emballage sous vide

Info

Publication number
EP1608556A2
EP1608556A2 EP04718016A EP04718016A EP1608556A2 EP 1608556 A2 EP1608556 A2 EP 1608556A2 EP 04718016 A EP04718016 A EP 04718016A EP 04718016 A EP04718016 A EP 04718016A EP 1608556 A2 EP1608556 A2 EP 1608556A2
Authority
EP
European Patent Office
Prior art keywords
panel
bag
article
inner layer
gas
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.)
Withdrawn
Application number
EP04718016A
Other languages
German (de)
English (en)
Inventor
Hongyu Wu
Charles Wade Albritton
David Brakes
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.)
Tilia International Inc USA
Original Assignee
Tilia International Inc USA
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 US10/794,951 external-priority patent/US20050035020A1/en
Priority claimed from US10/794,369 external-priority patent/US7138025B2/en
Application filed by Tilia International Inc USA filed Critical Tilia International Inc USA
Publication of EP1608556A2 publication Critical patent/EP1608556A2/fr
Withdrawn legal-status Critical Current

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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/04—Forming flat bags from webs
    • B65B43/06—Forming flat bags from webs from more than one web
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
    • B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
    • B65D81/2038—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum with means for establishing or improving vacuum
    • 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
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/50—Enclosing articles, or quantities of material, by disposing contents between two sheets, e.g. pocketed sheets, and securing their opposed free margins
    • 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
    • B65B5/00—Packaging individual articles in containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, jars
    • B65B5/02—Machines characterised by incorporation of means for making the containers or receptacles
    • 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
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/02—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging
    • B65B61/025—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for perforating, scoring, slitting, or applying code or date marks on material prior to packaging for applying, e.g. printing, code or date marks on material prior to packaging
    • 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
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • B65B9/042—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material for fluent material
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/004—Information or decoration elements, e.g. level indicators, detachable tabs or coupons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
    • B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
    • B65B2009/047—Rotary pocket formers

Definitions

  • the present invention relates to bags for use in vacuum packaging and methods and devices for manufacturing bags for use in vacuum packaging.
  • Methods and devices for preserving perishable foods such as fish and meats, processed foods, prepared meals, and left-overs, and non-perishable items are widely known, and widely varied.
  • Foods are perishable because organisms such as bacteria, fungus and mold grow over time after a food container is opened and the food is left exposed to the atmosphere.
  • Most methods and devices preserve food by protecting food from organism-filled air.
  • a common method and device includes placing food into a gas-impermeable plastic bag, evacuating the air from the bag using suction from a vacuum pump or other suction source, and tightly sealing the bag.
  • a bag for use in vacuum packaging can consist of a first panel and second panel, each panel consisting of a single layer of heat-sealable, plastic-based film (for example, polyethylene).
  • the panels are sealed together along a substantial portion of the periphery of the panels by heat-sealing techniques so as to form an envelope.
  • Perishable products such as spoilable food, or other products are packed into the envelope via the unsealed portion through which air is subsequently evacuated. After perishable products are packed into the bag and air is evacuated from the inside of the bag, the unsealed portion is heated and pressed such that the panels adhere to each other, sealing the bag.
  • 2,778,173, incorporated herein by reference, discloses a method for improving the evacuation of air from the bag by forming channels in at least one of the panels with the aid of embossing techniques. Air escapes from the bag along the channels during evacuation.
  • the embossing forms a pattern of protuberances on at least one of the panels.
  • the protuberances can be discrete pyramids, hemispheres, etc., and are formed by pressing a panel using heated female and male dies.
  • the first panel is overlaid on the second panel such that the protuberances from one panel face the opposite panel.
  • the contacting peripheral edges of the panels are sealed to each other to form an envelope having an inlet at an unsealed portion of the periphery.
  • a vacuum bag is formed having a first panel and a second panel consisting of laminated films. Each panel comprises a heat- sealable inner layer, a gas-impermeable outer layer, and optionally, one or more intermediate layers.
  • U.S. Pat. No. Re.34,929 Such a bag is described in U.S. Pat. No. Re.34,929, incorporated herein by reference. At least one film from at least one panel is embossed using an embossing mold to form protuberances and channels defined by the space between protuberances, so that air is readily evacuated from the vacuum bag.
  • U.S. Pat. No. 5,554,423, incorporated herein by reference discloses still another bag usable in vacuum packaging.
  • the bag consists of a first and second panel, each panel consisting of a gas-impermeable outer layer and a heat-sealable inner layer. A plurality of heat-sealable strand elements are heat bonded at regular intervals to the inner layer of either the first panel or the second panel.
  • the spaces between strand elements act as channels for the evacuation of air.
  • the strand elements are extruded from an extrusion head and heat bonded to the heat-sealable layer by use of pressure rolls. Separate equipment is required for producing strand elements, and a procedure of heat bonding a plurality of strand elements at regular intervals to the heat-sealable inner layer is complicated. Also, various shapes of pattern are hard to form using this process.
  • FIG. 1 A is a perspective view of a method for manufacturing a vacuum bag in accordance with one embodiment of the present invention
  • FIG. 1B is a side view of the method shown in FIG. 1A illustrating the embossing method used in an embodiment of the present invention
  • FIG. 1C is a close-up view of a portion of FIG. 1B;
  • FIG. 2A is a plan view of a panel in accordance with one embodiment of the present invention, manufactured by the process shown in FIG. 1A-1C;
  • FIG. 2B is a cross-section view of a panel in accordance with one embodiment of the present invention, manufactured by the process shown in FIG.1A-1C; and [0036]
  • FIG. 3 is a perspective view of a vacuum bag in accordance with one embodiment of the present invention.
  • FIGs. 1A-1C illustrate one embodiment of a method for manufacturing a vacuum bag in accordance with the present invention.
  • the vacuum bag comprises a first panel and a second panel, wherein each panel comprises a gas-impermeable base layer 108 and a heat-sealable inner layer 106 with at least one panel having raised walls for preventing shifting of perishable or other product contained inside the vacuum bag.
  • a laminating roll 102 and a cooling roll 104 are arranged so that the heat-sealable inner layer 106 can be laminated to the gas-impermeable base layer 108 as the melt-extruded resin is cooled. As illustrated in FIG.
  • the gap between the laminating roll 102 and the cooling roll 104 can be controlled according to specifications (for example, thickness) of a panel for use in vacuum packaging.
  • the temperature of the cooling roll 104 is maintained in a range such that the melt-extruded heat-sealable resin is sufficiently cooled to form the desired pattern. For example, a temperature range of about -15° to about -10° can be sufficient to properly form the desired pattern.
  • the temperature range of the cooling roll 104 can vary according to the composition of the resin, the composition of the gas-impermeable base layer 108, environmental conditions, etc. and can require calibration.
  • the cooling roll 104 can be sized to have a larger diameter than the laminating roll 102, thereby bringing the melt-extruded resin into contact with more cooled surface area.
  • the diameter of the cooling roll 104 can be about one-and-a-half to about three times as large as that of the laminating roll 102.
  • the heat-sealable inner layer 106 is typically made of a thermoplastic resin.
  • the resin can be comprised of polyethylene (PE) suitable for preserving foods and harmless to a human body.
  • PE polyethylene
  • a vacuum bag can be manufactured by overlapping two panels such that the heat-sealable resin layers 106 of the two panels is brought into contact and heat is applied to a portion of the periphery of the panels to form an envelope.
  • the thermoplastic resin can be chosen so that the two panels strongly bond to each other when sufficient heat is applied.
  • the gas-impermeable base layer 108 is fed to the gap between the cooling roll 104 and the laminating roll 102 by a feeding means (not shown).
  • the gas-impermeable base layer can be comprised of polyester, polyamide, ethylene vinyl alcohol (EVOH), nylon, or other material having similar properties and capable of being used in this manufacturing process, and also capable of being heated.
  • the gas-impermeable base layer 108 can consist of one layer, or two or more layers. When employing a multilayer-structured base layer, it should be understood that a total thickness thereof is also adjusted within the allowable range for the total gas-impermeable base layer 108.
  • An extruder 110 is positioned in such a way that the melt-extruded resin is layered on the gas-impermeable base layer 108 by feeding the melt-extruded resin to the nip between the cooling roll 104 and the gas-impermeable layer 108.
  • the resin is fed through a nozzle 112 of the extruder 110.
  • the temperature of the melt-extruded resin is dependent on the type of resin used, and can typically range from about 200° to about 250°.
  • the amount of resin to be extruded into the laminating unit 100 is dependent on the desired thickness of the heat-sealable inner layer 106.
  • a pattern fabricated on the circumferential surface of the cooling roll 104 in accordance with one embodiment of the present invention can include cavities for forming raised walls defining one or more discrete trays.
  • the pattern can also optionally include cavities (and/or protuberances) for forming ridges or protuberances within the raised walls for suspending a perishable or other product over a base of the trays, thereby allowing liquid to collect in the tray.
  • the resin extruded by the nozzle 112 is pressed between the cooling roll 104 and the gas-impermeable base layer 108 and flows into the cavities of the cooling roll
  • the melt-extruded resin quickly cools and solidifies in the desired pattern while adhering to the gas-impermeable base layer 108, thereby forming the heat sealable inner layer 106 of the panel.
  • the heat-sealable inner layer 106 can be formed while the resin is sufficiently heated to allow the resin to flow, thereby molding the resin, unlike conventional methods adopting a post-embossing treatment where the heat-sealable inner layer is drawn by a die or embossed between male and female components.
  • FIG. 2A is a plan view of a panel formed by the cooling roll 104 for use in a vacuum bag, in which the heat-sealable inner layer 106 is molded in such a way that raised walls 232 are formed for defining a tray 230 for restricting the movement of perishable or other products.
  • raised walls 232 of the tray are formed within the raised walls 232 of the tray.
  • ridges 234 are cross- hatched and form reservoirs 236 for liquid to collect.
  • the ridges can be formed in a multitude of different patterns, allowing for the formation of reservoirs 236 having a multitude of different shapes and sizes.
  • the tray 230 can include protuberances, wherein the protuberances can be discrete pyramids, hemispheres, etc., thereby allowing liquid to collect evenly in the base of the tray 230.
  • the panel 220 can include a plurality of discrete trays 230, each sized to suit an application and optionally having ridges 234 or protuberances.
  • the panel 220 can be configured to restrict the movement of perishable products within a vacuum bag.
  • the thickness of the raised walls 232 and ridges 234 formed on the heat- sealable inner layer 106 of a panel 220 can be determined by the depth of the cavities of the cooling roll 104, and the width of the raised walls 232 and ridges 234 can be determined by the width of the cavities.
  • the shape, width, and thickness of the raised walls 232 and ridges 234 can be controlled by changing the specifications for the cavities of the cooling roll 104.
  • FIG.2B is a cross-sectional view of the panel 220 described above.
  • the raised walls 232 can range, for example, from about 35-75 mils or more in height
  • the gas-impermeable base layer 108 can range, for example, from about 0.5-8.0 mils in thickness
  • the heat-sealable inner layer 106 can range, for example, from about 0.5-6.0 mils in thickness (without the raised walls 232).
  • ridges 234 or protuberances can by included. The ridges 234 or protuberances can have a height lower than the raised walls 232, thereby suspending the perishable or other product while still retaining the perishable product within the tray 230.
  • FIG.3 illustrates a bag for use in vacuum packaging in accordance with one embodiment of the present invention.
  • the vacuum bag 350 comprises a first panel 320 and a second panel 322 overlapping each other. At least one tray 230 is formed on the first panel 320 in accordance with an embodiment described above.
  • the second panel 322 (or first panel 320) optionally includes channels (not shown) along a portion of the panel for evacuating air and other gases from the bag.
  • the channels can be formed, for example, as described in the cross-referenced application "LIQUID-TRAPPING BAG FOR VACUUM PACKAGING," incorporated herein by reference.
  • the heat-sealable resin layer 106 and the gas-impermeable base layer 108 of the first and second panels 320,322 are typically made of the same material respectively, but can alternatively be made of different materials that exhibit heat-sealability and gas-impermeability respectively. As described above, the heat- sealable resin layer 106 is used as an inner layer and the gas-impermeable base layer 108 is used as an outer layer.
  • the lower, left, and right edges of the first and the second panel 320,322 are bonded to each other by heating, so as to form an envelope for receiving a perishable or other product to be vacuum packaged.
  • air and/or other gases can be evacuated from the bag 350, for example by a vacuum sealing machine as described in U.S. Pat. No. 4,941 ,310, which is incorporated herein by reference.
  • the inlet can be sealed by applying heat, thereby activating the heat- sealable inner layers 106 and bonding them together.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Vacuum Packaging (AREA)

Abstract

Poche pour emballage sous vide pouvant comprendre un premier et un second panneaux se recouvrant l'un l'autre. Un ou plusieurs plateaux destinés à recevoir des produits périssables ou autres sot formés dans au moins un des panneaux. Chaque plateau peut éventuellement comporter des rebords permettant de recueillir du liquide dans le plateau. Dans un mode de réalisation, l'invention concerne un procédé de fabrication d'un tel sac consistant à introduire un matériau imperméable aux gaz dans l'espace entre un rouleau de refroidissement et un rouleau de laminage. De la résine est extrudée dans l'écartement entre rouleaux se telle sorte qu'elle remplisse une pluralité de cavité dans le rouleau de refroidissement et forme une couche intérieure qui adhère sur le matériau imperméable aux gaz. La feuille ainsi obtenue est repliée pour former un premier et un second panneau, puis scellée pour former une poche. Pour d'autres caractéristiques, aspects et objets de l'invention, se reporter au spécifications, chiffres et caractéristiques.
EP04718016A 2003-03-05 2004-03-05 Systeme et procede permettant de former un plateau integre pour emballage sous vide Withdrawn EP1608556A2 (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
US45217203P 2003-03-05 2003-03-05
US45217103P 2003-03-05 2003-03-05
US452171P 2003-03-05
US452172P 2003-03-05
US794951 2004-03-04
US794369 2004-03-04
US10/794,951 US20050035020A1 (en) 2003-03-05 2004-03-04 Sealable bag having an integrated tray for use in vacuum packaging
US10/794,369 US7138025B2 (en) 2003-03-05 2004-03-04 Method for manufacturing a sealable bag having an integrated tray for use in vacuum packaging
PCT/US2004/006774 WO2004078591A2 (fr) 2003-03-05 2004-03-05 Systeme et procede permettant de former un plateau integre pour emballage sous vide

Publications (1)

Publication Number Publication Date
EP1608556A2 true EP1608556A2 (fr) 2005-12-28

Family

ID=32966717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04718016A Withdrawn EP1608556A2 (fr) 2003-03-05 2004-03-05 Systeme et procede permettant de former un plateau integre pour emballage sous vide

Country Status (6)

Country Link
EP (1) EP1608556A2 (fr)
KR (1) KR20050107602A (fr)
AU (1) AU2004217918A1 (fr)
CA (1) CA2517894A1 (fr)
MX (1) MXPA05009458A (fr)
WO (1) WO2004078591A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006100287B4 (en) * 2002-04-18 2006-08-17 Alto Packaging Limited Trays

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105491A (en) * 1975-02-21 1978-08-08 Mobil Oil Corporation Process and apparatus for the manufacture of embossed film laminations
US4321997A (en) * 1979-11-23 1982-03-30 Miller Alan H Receptacle for moisture-exuding food products
IT231279Y1 (it) * 1993-10-13 1999-08-02 Abate Luigi Elemento tubolare per la formazione di sacchetti per il confezionamento di prodotti sottovuoto
DE19851778C2 (de) * 1998-11-10 2001-02-15 Weller Frank Uwe Kombination aus einem flüssigkeitsdichten Fleischtablett mit eingelegter Saug-Trennschicht

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004078591A2 *

Also Published As

Publication number Publication date
KR20050107602A (ko) 2005-11-14
WO2004078591A2 (fr) 2004-09-16
WO2004078591A3 (fr) 2005-02-10
MXPA05009458A (es) 2005-11-23
CA2517894A1 (fr) 2004-09-16
AU2004217918A1 (en) 2004-09-16

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