EP0113787B1 - Emballage expansible pour récipients distributeurs - Google Patents

Emballage expansible pour récipients distributeurs Download PDF

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Publication number
EP0113787B1
EP0113787B1 EP19830100189 EP83100189A EP0113787B1 EP 0113787 B1 EP0113787 B1 EP 0113787B1 EP 19830100189 EP19830100189 EP 19830100189 EP 83100189 A EP83100189 A EP 83100189A EP 0113787 B1 EP0113787 B1 EP 0113787B1
Authority
EP
European Patent Office
Prior art keywords
pockets
sheet member
package
tape
pocket
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.)
Expired
Application number
EP19830100189
Other languages
German (de)
English (en)
Other versions
EP0113787A1 (fr
Inventor
Reid M. Mahaffy
George W. Anderson
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.)
Cessione ccl Technologies Inc
Original Assignee
Enviro-Spray Systems Inc
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 Enviro-Spray Systems Inc filed Critical Enviro-Spray Systems Inc
Priority to EP19830100189 priority Critical patent/EP0113787B1/fr
Priority to DE8383100189T priority patent/DE3369300D1/de
Publication of EP0113787A1 publication Critical patent/EP0113787A1/fr
Application granted granted Critical
Publication of EP0113787B1 publication Critical patent/EP0113787B1/fr
Expired 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
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like
    • B65D83/625—Contents and propellant separated by membrane, bag, or the like the propellant being generated by a chemical or electrochemical reaction

Definitions

  • This invention relates to product dispensing containers wherein the container contents are forced out by internal pressure, usually under control of a valve at the top of the container. More particularly, this invention relates to a sealed package to be inserted in such a container to develop the dispensing pressure.
  • U.S. Patent No. 3,718,236 discloses a system for generating pressure within a dispensing container by mechanically combining two or more reactive chemicals in a sealed bag-like structure free-floating within the container.
  • the bag includes a number of sealed compartments containing sodium bicarbonate which are ruptured to combine that chemical with a mixture of citric acid and water so as to develop gas pressure within the bag. The rupturing of these compartments is carried out sequentially as the dispensing operation proceeds, in order to develop successive increments of additional pressurized gas as required to maintain an approximately constant pressure within the container as the contents are dispensed.
  • European Patent Publication No. 0 044 887 discloses a bag-like package of the above-described type wherein a first outer sheet member is formed with a plurality of pockets opening into the interior of the bag-like package. At least one of the pockets contains a first chemical component of a set of chemicals to be reacted together to form an initial dispensing pressure. A second component of the set of chemicals is disposed within the package for reacting with the first chemical component to develop the initial dispensing pressure.
  • the plurality of pockets includes a set of pockets containing additional chemical material capable of reacting with at least one chemical of said set of chemicals to develop further dispensing pressure.
  • the bag-like package further comprises a second outer sheet member sealed peripherally to the first outer sheet member.
  • a tape member is disposed between the first and the second outer sheet members and positioned over the first openings of the set of pockets.
  • the tape member is releasably sealed around the peripheries of the openings of the set of pockets to the first outer sheet member and is substantially permanently sealed to the second outer sheet member to provide for progressive lift-off of the tape member from the first outer sheet member.
  • the present invention is directed to improvements in the bag-like package of EP-A 0 044 887. It is an object of the invention to provide means adapted for retarding the flow of liquid out of at least one pocket, and thereby controlling the degree of an initial chemical reaction commenced upon placing the package into a vertical orientation.
  • the one pocket containing the first chemical component comprises a plurality of separate sections formed to allow communication therebetween, while another pocket is provided in the first outer sheet member for holding a charge of the second chemical component.
  • a sheet of flexible plastic packaging material 20 which is transported (from left to right) to a forming station 22 by conventional conveying means (not shown).
  • This sheet may for example be a 2-layer film or web comprising polyethylene/ polypropylene, with the polyethylene facing upwards.
  • thermoforming operations are carried out in accordance with known processes to form the sheet 20 with a number of pockets generally indicated at 24, 26 and 28, and adapted to receive chemicals to be reacted together for developing gas pressure.
  • thermoforming of the sheet 20 preferably is carried out in multiple across the width of the plastic film 20, for example, four abreast, as shown in Figure 1 between the machine frames 29.
  • four abreast as shown in Figure 1 between the machine frames 29.
  • only one of the four identical formed sections will be described in detail hereinafter.
  • the first of the formed pockets 24 may be circular in plan view, and provides a cell for holding one or more tablets or capsules containing citric acid in solid form.
  • the second of the pockets 26 is developed in this embodiment as three distinct but intercommunicating rectangular cells for holding a mixture of bicarbonate of soda and water.
  • the remaining set of pockets 28 provides a number (seven in this case) of separate but closely adjacent cells for holding citric acid in the form of a solution.
  • the pockets 24-28 are filled with chemical materials as set forth above (not shown in the drawings), in any convenient way, at the station 22 or at a subsequent station.
  • the formed and filled sheet member 20 is transported to another station 30 ( Figure 2) where a rectangular tape 32 is positioned over the set of pockets 28 and is heat-sealed to the sheet member 20 around the peripheries of the individual cells, e.g. closely adjacent the open mouths of the pockets, as illustrated by the shading at 34.
  • the tape 32 is a strip-like member of flexible plastic material. This tape is heat-sealed uniformly but lightly to the upper surface of the bottom sheet 20 in such a way that it can be pulled away with relatively low force, e.g. 300 to 1000 grams per inch of width.
  • the tape may for example be a 3-layer film comprising polyethy- lene/polyester/polypropylene, with the polypropylene being the bottom layer sealed to the polyethylene layer of the bottom sheet member 20 and advantageously providing the light-force peelability as described. Peelability in this case means that the pull force should be sufficiently light that the two films can readily be separated without resulting in any tearing of the films.
  • the bottom sheet 20 is moved forward to a subsequent station 38 ( Figure 3) where a second sheet of flexible plastic packaging material 40 is applied over the first sheet 20 and the tape 32, as with the aid of a laydown roller 41.
  • This second sheet is heat-sealed in peripheral fashion around the first sheet, as indicated by the shading 42, to form a strongly sealed enclosure encompassing all of the pockets 24-28 as well as the tape 32.
  • This top sheet 40 also is secured to the tape 32, as by heat-sealing the two together along a narrow line 44 adjacent the pockets 28.
  • This seal like seal 42, is a strong seal capable of holding the films together during normal operation of the package, capable of resisting a force order of magnitude greater than the force needed to open the peelable seal 34.
  • seals 42 and 44 effectively serve as welds, whereby application of a sufficiently large force would tear the film material rather than open the seal.
  • Figures 4-6 further illustrate the sealing configuration, with certain aspects of the interfilm spacing somewhat exaggerated to clarify the relationships involved. See also Figure 7 for an overall perspective view of the final package.
  • the top sheet 40 may for example be a 2- layered film or web consisting of polypropylene/ polyethylene, with the polyethylene on the lower (inner) side, facing downwards towards the tape 32.
  • This combination of materials provides for a very strong seal between the top sheet and the tape at 44, and between the top and bottom sheets at 42, because both are polyethylene-to- polyethylene seals.
  • the heat applied in making the seal 44 also produces unintended sealing between the tape 32 and the bottom sheet 20, it will be a weak polypropylene-to-polyethylene seal, using the types of sheet and tape materials suggested above, and will not interfere with the pulling of the tape up from the bottom web with only a light pulling force.
  • the amount of heat reaching the interface between the tape 32 and the bottom sheet 20 will be significantly less than that producing the seal 34, when using comparable heat sealing devices for both seals 34, 44, so if an inadvertant seal develops along line 44 between the tape and the bottom sheet it will be of even less strength than the light-force seal between the tape and the bottom sheet at the seal line 34.
  • the completed package thereafter is cut from the forming webs and is ready for use.
  • the water and sodium bicarbonate mixture in the cells 26 will flow to the tablets or capsule in cell 24, thus starting gas production within the sealed package.
  • Gas production will normally be slow enough to allow time to load the package into a dispensing container, particularly if the known means are employed to slow down the reaction.
  • the package expands to fill the space left by the dispensed contents.
  • the two sheet members 20 and 40 are gradually forced apart, especially in the central region adjacent the seal line 44.
  • This expansion thus also lifts up the tape 32 in a progressive fashion, starting at the inner edge of the tape which runs parallel to the seal line 44, and moving outwardly towards the side edge of the package, across the set of pockets 28. Since these pockets are staggered, the progressive lift-up of the tape causes the individual cells to be opened sequentially, thus developing successive additional increments of gas pressure to tend to maintain the internal container pressure approximately constant.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Claims (6)

1. Garniture destinée à être placée dans un conteneur de manière à y générer une pression servant à distribuer les produits du conteneur, cette garniture se composant d'une première feuille extérieure (20) comportant plusieurs poches (26, 28) débouchant à l'intérieur de la garniture, au moins l'une des poches (26) contenant un premier composant chimique d'un ensemble de produits chimiques destinés à réagir par réaction pour engendrer une pression initiale de distribution, un second composé chimique de cet ensemble de composés destiné à être dans la garniture pour réagir avec le premier composé chimique et engendrer cette pression initiale de distribution, ces différentes poches comprenant un ensemble de poches (28) contenant une matière chimique additionelle susceptible de réagir avec au moins l'un des produits chimiques de l'ensemble des produits chimiques pour développer une autre pression de distribution, cette garniture comprenant en outre une seconde feuille extérieure (40) scellée à la périphérie à la première feuille extérieure, cette garniture comprenant également un élément en forme de bande (32) entre la première et la seconde feuille extérieure, cet élément étant placé sur les ouvertures de l'ensemble de poches (28), en étant scellé de manière amovible autour de la périphérie des ouvertures de cet ensemble de poches (28) sur la première feuille extérieure (20) en étant scellé de manière pratiquement permanente (44) sur la seconde feuille extérieure (40) de manière à créer un dégagement progressif de l'élément en forme de bande (32) par rapport à la première feuille extérieure (20), caractérisée en ce que l'une (26) des poches contenant le premier composé chimique se compose de plusieurs sections distinctes réalisées de manière à permettre la communication du liquide entre ces sections, et caractérisée en outre en ce que cette autre poche (24) est prévue dans la première feuille extérieure, le second composé chimique étant placé dans cette autre poche (24).
2. Garniture selon la revendication 1, caractérisée en outre en ce qu'elle présente en plan une forme générale rectangulaire, l'autre poche (24) étant située à une extrémité de la garniture et en ce que l'une des poches (26) est située pratiquement au milieu entre les extrémités de ta garniture.
3. Garniture selon la revendication 2, caractérisée en ce que l'une des poches (26) est située près d'un grand côté de la forme de la garniture et en ce que l'ensemble des poches (28) est placé au voisinage de l'une des poches (26) et le long de l'autre grand côté de cette forme de garniture.
4. Procédé de fabrication d'une garniture étanche pour engendrer une pression de distribution à l'intérieur d'un conteneur de distribution, consistant à réaliser une première feuille (20) avec un ensemble de poches (28) à placer dans cet ensemble de poches une matière chimique susceptible de réagir avec l'un des deux composants chimiques pour générer une pression de gaz, à placer un élément en forme de bande (32) par dessus les ouvertures de cet ensemble de poches, à sceller une seconde feuille (40) sur la première feuille par un scellement périphérique de manière à former une enceinte scellée entourant toutes les poches et l'élément en forme de bande et à fixer la seconde feuille sur l'élément en forme de bande pour permettre un enlèvement progressif de l'élément en forme de bande par rapport à cet ensemble de poches, caractérisé en ce que (a) on réalise le premier élément en forme de feuille (20) avec une première poche additionelle (26) comprenant plusieurs sections distinctes réalisées de manière à permettre entre elles le passage d'un liquide, (b) on munit cette première feuille d'une seconde poche additionnelle (24), (c) on place dans la première et dans la seconde poche additionnelle un premier et un second composant d'un ensemble de deux composants chimiques, les étapes (a, b, c) étant effectuées avant de sceller la seconde feuille (40) sur la première feuille (20), l'enceinte scellée entourant la première et la seconde poche additionnelle.
5. Procédé selon la revendication 4, caractérisé en outre en ce que la seconde poche additionnelle (24) est réalisée prés d'une extrémité de la première feuille (20) et en ce que la première poche additionnelle (26) est formée entre la seconde poche additionnelle (24) et une extrémité opposée de la première feuille (20).
6. Procédé selon la revendication 4, caractérisé en outre en ce que la première feuille additionnelle (26) est réalisée au voisinage d'un grand côté de la première feuille (20) et en ce que l'ensemble de poches (28) est réalisé au voisinage d'un grand côté opposé de la première feuille (20).
EP19830100189 1983-01-12 1983-01-12 Emballage expansible pour récipients distributeurs Expired EP0113787B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19830100189 EP0113787B1 (fr) 1983-01-12 1983-01-12 Emballage expansible pour récipients distributeurs
DE8383100189T DE3369300D1 (en) 1983-01-12 1983-01-12 Improved expandible package for dispensing containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19830100189 EP0113787B1 (fr) 1983-01-12 1983-01-12 Emballage expansible pour récipients distributeurs

Publications (2)

Publication Number Publication Date
EP0113787A1 EP0113787A1 (fr) 1984-07-25
EP0113787B1 true EP0113787B1 (fr) 1987-01-21

Family

ID=8190229

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830100189 Expired EP0113787B1 (fr) 1983-01-12 1983-01-12 Emballage expansible pour récipients distributeurs

Country Status (2)

Country Link
EP (1) EP0113787B1 (fr)
DE (1) DE3369300D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA874580B (fr) * 1986-07-04 1988-01-04

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718236A (en) * 1969-12-04 1973-02-27 E Reyner Pressurized container with non-rigid follower
IE51803B1 (en) * 1979-12-19 1987-04-01 Enviro Spray Systems Inc Self-pressurizing dispensing container
US4376500A (en) * 1980-07-25 1983-03-15 Enviro-Spray Systems, Inc. Expandable bag
US4478044A (en) * 1981-08-05 1984-10-23 Enviro-Spray Systems, Inc. Inflatable pouch and method of manufacture

Also Published As

Publication number Publication date
DE3369300D1 (en) 1987-02-26
EP0113787A1 (fr) 1984-07-25

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