WO1988002339A1 - Self-sealable liquid dispensing container - Google Patents

Self-sealable liquid dispensing container Download PDF

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Publication number
WO1988002339A1
WO1988002339A1 PCT/US1986/002051 US8602051W WO8802339A1 WO 1988002339 A1 WO1988002339 A1 WO 1988002339A1 US 8602051 W US8602051 W US 8602051W WO 8802339 A1 WO8802339 A1 WO 8802339A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
passage
sheets
fluid
pouch
Prior art date
Application number
PCT/US1986/002051
Other languages
French (fr)
Inventor
James Patrick Hawkins
Original Assignee
James Patrick Hawkins
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 James Patrick Hawkins filed Critical James Patrick Hawkins
Priority to PCT/US1986/002051 priority Critical patent/WO1988002339A1/en
Priority to EP19860906534 priority patent/EP0334839A4/en
Priority to JP61505555A priority patent/JPH01501056A/en
Publication of WO1988002339A1 publication Critical patent/WO1988002339A1/en
Priority to KR1019880700611A priority patent/KR880701667A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/266Auxiliary operations after the thermoforming operation
    • B29C51/267Two sheets being thermoformed in separate mould parts and joined together while still in the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D35/00Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
    • B65D35/22Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor with two or more compartments
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/004Preventing sticking together, e.g. of some areas of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/244Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being non-straight, e.g. forming non-closed contours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/84Specific machine types or machines suitable for specific applications
    • B29C66/851Bag or container making machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52Details
    • B65D75/58Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5816Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion
    • B65D75/5822Opening or contents-removing devices added or incorporated during package manufacture for tearing a corner or other small portion next to the edge, e.g. a U-shaped portion and defining, after tearing, a small dispensing spout, a small orifice or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81411General 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
    • B29C66/81421General 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 convex or concave
    • B29C66/81422General 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 convex or concave being convex
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81411General 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
    • B29C66/81421General 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 convex or concave
    • B29C66/81423General 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 convex or concave being concave
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/816General 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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8167Quick change joining tools or surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/818General 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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8183General 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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal conducting constructional aspects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D75/00Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding

Definitions

  • This invention relates to flexible dispensing containers for limited amounts of liquid which are made from sheets of pliable material sealed around their edges and provided with a narrow outlet channel running through one of the sealed edge sections of the container and terminating near a corner which can be torn off to open the channel and allow the liquid to be dispensed when the container is squeezed.
  • a third object of this invention is to provide a means to accommodate large variations in the internal pressure of the liquid holding pouch due to carbonation.
  • Figure 1 is a perspective view of a flexible liquid container according to the invention.
  • Figure 2 is a partial frontal view of the working face of a container molding plate
  • Figure 3 is a cross-sectional view of a couple of cooperating molding plates
  • Figure 4 is a perspective view of a convex, blister-molding insert
  • Figure 5 is a perspective view of a concave, blister-molding insert
  • Figure 6 is a frontal view of the upper part of a molding plate showing a first alternate configuration
  • Figure 7 is the frontal view of a molding plate showing a second alternate configuration
  • Figure 8 is a diagrammatical and cross- sectional view of an expansion chamber in the deflated condition.
  • Figure 9 is the diagrammatical and cross- sectional view of an inflated expansion chamber.
  • FIG. 1 a flexible liquid container 10 according to the invention.
  • the container is made from two sheets 18 and 19 of pliable synthetic material which has been heat-sealed about their edge and about a carefully delineated area of the upper portion 20 of the container.
  • the unsealed area between the two sheets 18 and 19 form a pouch 13 for holding a fluid, as well as a self-sealing outlet 11, a pouring spout 12 and a expandable ballast chamber 14.
  • FIG 2 illustrates the working face of the upper part of a pair of heat-sealing plates 21 and 22.
  • Each plate is preferably made of a highly heat-conductive metal which, as shown in Figure 3 is bonded to a backplate 23.
  • the backplate acts as a heat distributing element.
  • the backplate 23 may be heated by various well-known means such as embedded resistive elements and the like.
  • Area 24 of the working face of each backplate which corresponds to the liquid-holding pouch 13, the outlet 11 and the spout 12 indicated by stippling in Figure 2 has been etched to a depth of a few milimeters.
  • the channel 26 is relatively long and narrow so that in the absence of strong internal pressure the walls of the resulting outlet tend to collapse against each other and remain closely stuck under the effect of capillarity even after the outlet has been opened by tearing off the corner part 16. It can now be understood that any fluid stored in the pouch 13 can be extracted by two separate means, either by way of the self- sealing outlet 11 once the corner part 16 has been -1-
  • the expandable plastic chamber 14 is formed during the manufacturing process of the container 10 by installing a pair of blister-shaping inserts through line-up balls in the plates 21 and 22.
  • One insert 34 offers a concave area on the working face of the plate 22 while the other insert 33 shows a corresponding convex area 36 which is positioned and dimensioned to nest intimately within the concave area 35 of the other insert 34.
  • the inserts are made from a hard material which has a lower heat conductibility than the material from which the plates 21 and 22 are made. The heat transmitted to the insert as well as other relevant parameters are adjusted to cause the forming of nesting blisters in the two layers of the container material without allowing any material adhesion.
  • Figures 4 and 5 respectively illustrate the shape of the inserts 33 and 34.
  • the threshold between the non-adhesive shaping of the blister and the bonding of the two layers of the synthetic material used in the fabrication of the container depends on the combination of three parameters: heat, pressure and dwell-time. While the dwell-time is common to all areas of the container, the pr-essure applied by the nesting of the two faces 35 and 36 of the inserts may be made different than the pressure applied by the non- etched area 25 of the plates 21 and 22 by carefully contouring and adjusting the faces of the inserts 33 and 34. Similarly the heat transferred to the insert can be adjusted by varying the penetration of the mounting screws 37 and 37A into the body of the inserts 33 and 34 respectively. The choice of insert material between various grades of ceramic and resin will also dictate the amount of heat applied by the insert to form the blister.
  • Figure 6 illustrates a first alternate treatment of the upper part of the forming plates 21. It should be noted that the ovoid insert 38 extend over the cut-off area 31 of the spout 12; thus providing two inlets 39 and 40 into the blister area.
  • Figure 7 illustrates a second alternate embodiment wherein the blister-forming insert 41 is postitioned under the outlet-forming channel 42.
  • the expandable ballast chamber has an inlet near the conjuncture of the inner pouch and the beginning of the self-sealing outlet. Accordingly, once the self-sealing outlet 11 has been used and a portion of the liquid has been evacuated from the pouch, any building of gas pressure in this area will tend to expand the volumetrically variable chamber 44 rather than through the tightly closed outlet 11.
  • the size and shape of the blistered area as well as the gauge and length of outlet can be adjusted to accommodate various types and volumes of carbonated liquid within the pouch 13 and yet allow for an immediate self-sealing of the outlet after first or subsequent drawing of the carbonated drink from the pouch. While the preferred embodiment of the invention has been described and alternate configurations have been suggested, it should be understood that other embodiments may be devised and modifications can be made without departing from the spirit of the invention and the scope of the appended claims.

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

Abstract

A liquid dispensing container (10) made from pliable sheets of synthetic material having a self-sealable outlet (11) and a pouring spout (12) each of which can be opened by tearing off one of the corners of the container. The inner corner (15) of the liquid-holding pouch (13) which is proximate to the self-sealable outlet has been rounded away from the tearable part (16) in order to prevent inadvertent puncture of the pouch. An expandable ballast chamber (14) is provided near the junction of the outlet (11) and the inner pouch (13) to absorb the pressure due to escape of carbonation gases in order to releave the pressure against the self-sealable outlet (11) and prevent leakage once the outlet corner (16) has been broken, except when extra pressure is applied to the pouch (13).

Description

Self-Sealable Liquid Dispensing Container Field of the Invention
This invention relates to flexible dispensing containers for limited amounts of liquid which are made from sheets of pliable material sealed around their edges and provided with a narrow outlet channel running through one of the sealed edge sections of the container and terminating near a corner which can be torn off to open the channel and allow the liquid to be dispensed when the container is squeezed.
Background of the Invention
Squeezeable liquid pouch containers with self- sealing outlets have been addressed in the past, their basic embodiment was disclosed in U.S. Patent Number 2,707,581 Kaplan et al which was reissued under Number RE. 24,251. Additional improvements were disclosed in U.S. Patent Number 4,275,840 Staar, Number 4,331,264 Staar and 4,491,245 Jamison. Another U.S. Patent Number 4,592,493 Smith discloses a dispensing container with a self- sealing passageway with some minimal structural similarities to some aspects of the invention.
The various containers disclosed in this prior art exhibit a variety of defects. In the first place the sealed area, usually located in the upper section of the container, which surround the torturous path of the self-sealing outlet represents a large portion of the overall container, thus limiting the size of the liquid- holding pouch-. The delineation of the tear-off section which usually spans the upper portion of the container does not allow for the placement of multi-functional outlets. More significantly, this prior art did not address the problem of storing soda pop and other carbonated drinks with large variations of positive internal pressure.
Summary of the Invention
The primary object of this invention is to provide a flexible pouch-type liquid container with self-sealing outlet which allows for maximum liquid capacity. Another object of the invention is to provide multiple ways of extracting the contents of the container through either a self-sealing outlet activated by squeezing the pouch, and by means of a non-sealing spout. A third object of this invention is to provide a means to accommodate large variations in the internal pressure of the liquid holding pouch due to carbonation.
These and other objects are achieved by means of carefully planned configuration of the outlet and spout using tear-off corner sections in the upper part of the container. The inner corner of the liquid-holding* pouch proximate to a tear-off corner are carefully rounded to avoid inadvertent puncture of the pouch. An expandable chamber is formed at the conjuncture of the pouch and resealing outlet by means of nesting blisters formed into the walls of the container.
Brief Description of the Drawings
Figure 1 is a perspective view of a flexible liquid container according to the invention;
Figure 2 is a partial frontal view of the working face of a container molding plate;
Figure 3 is a cross-sectional view of a couple of cooperating molding plates;
Figure 4 is a perspective view of a convex, blister-molding insert;
Figure 5 is a perspective view of a concave, blister-molding insert;
Figure 6 is a frontal view of the upper part of a molding plate showing a first alternate configuration;
Figure 7 is the frontal view of a molding plate showing a second alternate configuration;
Figure 8 -is a diagrammatical and cross- sectional view of an expansion chamber in the deflated condition; and
Figure 9 is the diagrammatical and cross- sectional view of an inflated expansion chamber.
Description of the Preferred Embodiment of the Invention
Referring now to the drawing, there is shown in Figure 1 a flexible liquid container 10 according to the invention. The container is made from two sheets 18 and 19 of pliable synthetic material which has been heat-sealed about their edge and about a carefully delineated area of the upper portion 20 of the container. The unsealed area between the two sheets 18 and 19 form a pouch 13 for holding a fluid, as well as a self-sealing outlet 11, a pouring spout 12 and a expandable ballast chamber 14.
The construction and operation of those various elements can be best understood by reference to the tool used for fabricating such a container. Figure 2 illustrates the working face of the upper part of a pair of heat-sealing plates 21 and 22. Each plate is preferably made of a highly heat-conductive metal which, as shown in Figure 3 is bonded to a backplate 23. The backplate acts as a heat distributing element. The backplate 23 may be heated by various well-known means such as embedded resistive elements and the like. Area 24 of the working face of each backplate which corresponds to the liquid-holding pouch 13, the outlet 11 and the spout 12 indicated by stippling in Figure 2 has been etched to a depth of a few milimeters. When two overlaid sheets of eight-syllable material are pressed together between two of such plates where the working - face of each plate is a mirror image of the other, the non-etched areas 25 of the plates by a combination of heat pressure cause a sharply delineated adherence of the two sheets thus forming the edge and upper part of the pouch 13. The etched channel 26 which forms the outlet 11 of the pouch is brought near to one of the upper corners 27- a line of indentation 28 cut across the channel and the corner. Those indentations are designed to create a easily tearable line in the container material. A similar line 29 cutting across a portion 30 of the pouch-corresponding area is provided at the opposite corner 31. The channel 26 is relatively long and narrow so that in the absence of strong internal pressure the walls of the resulting outlet tend to collapse against each other and remain closely stuck under the effect of capillarity even after the outlet has been opened by tearing off the corner part 16. It can now be understood that any fluid stored in the pouch 13 can be extracted by two separate means, either by way of the self- sealing outlet 11 once the corner part 16 has been -1-
torn away by squeezing the main body of the pouch 13. An alternate way of extracting the contents of the pouch is to tear off the opposite corner section 17 through the non-resealing spout 12. In order to avoid inadvertent puncture of the pouch 13, the corner 32 of the etched area 24 nearest the end of the outlet-shaping channel 26 has been rounded away from the indentation line 28.
The expandable plastic chamber 14 is formed during the manufacturing process of the container 10 by installing a pair of blister-shaping inserts through line-up balls in the plates 21 and 22. One insert 34 offers a concave area on the working face of the plate 22 while the other insert 33 shows a corresponding convex area 36 which is positioned and dimensioned to nest intimately within the concave area 35 of the other insert 34. The inserts are made from a hard material which has a lower heat conductibility than the material from which the plates 21 and 22 are made. The heat transmitted to the insert as well as other relevant parameters are adjusted to cause the forming of nesting blisters in the two layers of the container material without allowing any material adhesion. Figures 4 and 5 respectively illustrate the shape of the inserts 33 and 34. It should be understood that the threshold between the non-adhesive shaping of the blister and the bonding of the two layers of the synthetic material used in the fabrication of the container depends on the combination of three parameters: heat, pressure and dwell-time. While the dwell-time is common to all areas of the container, the pr-essure applied by the nesting of the two faces 35 and 36 of the inserts may be made different than the pressure applied by the non- etched area 25 of the plates 21 and 22 by carefully contouring and adjusting the faces of the inserts 33 and 34. Similarly the heat transferred to the insert can be adjusted by varying the penetration of the mounting screws 37 and 37A into the body of the inserts 33 and 34 respectively. The choice of insert material between various grades of ceramic and resin will also dictate the amount of heat applied by the insert to form the blister.
Figure 6 illustrates a first alternate treatment of the upper part of the forming plates 21. It should be noted that the ovoid insert 38 extend over the cut-off area 31 of the spout 12; thus providing two inlets 39 and 40 into the blister area. Figure 7 illustrates a second alternate embodiment wherein the blister-forming insert 41 is postitioned under the outlet-forming channel 42.
The operation of the expandable ballast chamber is diagrammatically illustrated in Figures
8 and 9. In the absence of gas pressure the two blister-shaped wall areas 43 and 44 are nested together. Under the action of gases such as when the pouch is holding a carbonated drink, the inner blister area 43 is made to pop out in the opposite direction, thus creating the ballast chamber 45.
One will notice that in the various configurations described above, the expandable ballast chamber has an inlet near the conjuncture of the inner pouch and the beginning of the self-sealing outlet. Accordingly, once the self-sealing outlet 11 has been used and a portion of the liquid has been evacuated from the pouch, any building of gas pressure in this area will tend to expand the volumetrically variable chamber 44 rather than through the tightly closed outlet 11. The size and shape of the blistered area as well as the gauge and length of outlet can be adjusted to accommodate various types and volumes of carbonated liquid within the pouch 13 and yet allow for an immediate self-sealing of the outlet after first or subsequent drawing of the carbonated drink from the pouch. While the preferred embodiment of the invention has been described and alternate configurations have been suggested, it should be understood that other embodiments may be devised and modifications can be made without departing from the spirit of the invention and the scope of the appended claims.

Claims

CLAIMS 1. A flexible fluid container made from two sheets of synthetic pliable material, the edges of said sheet being sealed, one of said edges having a broad sealed area, a narrow passage from within said container extending through said sealed area into a peripheral section of said container, said peripheral section being severable at an intermediate point to open said passage in order to permit dispensing of said fluid through said narrow passage; and wherein the length and gauge of said passage are shaped and dimensioned to allow the walls of said passage to collapse against each other and to close said passage in the absence of fluid pressure from the inside of the container.
2. The container claimed in Claim 1 comprising an expandable chamber in communication with the fluid holding area of the container, said expandable chamber being formed by nested, non-sealed and blistered portions of said two sheets.
3. The container claimed in Claim 2, wherein said expandable chamber has an inlet at the juncture of said passage and said fluid holding area.
4. The container claimed in Claim 3, wherein said container has a quadrangular shape and each of said peripheral sections comprises a corner of said container.
5. The container claimed in Claim 4, wherein the inner corner of the fluid-holding area proximal to the peripheral section containing the tip of said passage is rounded away from said section.
6. The container claimed in Claim 5 further comprising a second severable peripheral section extending into the fluid holding area of said container.
7. An apparatus for forming a flexible fluid container from two sheets of pliable and heat- sealable material which comprises: means for heat-sealing the peripheral edges of said sheets and a patterned area along one of said edges; said means for heat-sealing including at least one heated pressure-plate with a working face having raised and non-raised portions defining said peripheral edges and said patterned area including a narrow passage from within the non-raised portion through the patterned area toward a section of one of said peripheral edges; and - means ' associated with said heat- sealing plate for forming a pair of nested, non-sealed blisters in said sheets.
8. The apparatus claimed in Claim 6, wherein said means for forming comprises: a first insert within the working face of said plate, said insert defining a concave form; and a second insert, in a matching plate, defining a convex form, said convex form being positioned, shaped and dimensioned to nest into said concave form.
9. The apparatus claimed in Claim 7, wherein said means for forming further includes means for limiting the temperature and pressure applied by said inserts to said sheets below a sealing threshold.
10. The apparatus claimed in Claim 8, wherein said inserts are in contact with the origin of said narrow passage.
11. The apparatus claimed in Claim 8, wherein said inserts are made from a material of lesser heat- conductivity than the faces of said plates.
PCT/US1986/002051 1986-10-01 1986-10-01 Self-sealable liquid dispensing container WO1988002339A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/US1986/002051 WO1988002339A1 (en) 1986-10-01 1986-10-01 Self-sealable liquid dispensing container
EP19860906534 EP0334839A4 (en) 1986-10-01 1986-10-01 Self-sealable liquid dispensing container.
JP61505555A JPH01501056A (en) 1986-10-01 1986-10-01 Self-sealable liquid dispensing container
KR1019880700611A KR880701667A (en) 1986-10-01 1988-05-31 Liquid dispensing container that can be self-sealed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1986/002051 WO1988002339A1 (en) 1986-10-01 1986-10-01 Self-sealable liquid dispensing container

Publications (1)

Publication Number Publication Date
WO1988002339A1 true WO1988002339A1 (en) 1988-04-07

Family

ID=22195657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1986/002051 WO1988002339A1 (en) 1986-10-01 1986-10-01 Self-sealable liquid dispensing container

Country Status (4)

Country Link
EP (1) EP0334839A4 (en)
JP (1) JPH01501056A (en)
KR (1) KR880701667A (en)
WO (1) WO1988002339A1 (en)

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US4899911A (en) * 1988-08-02 1990-02-13 Multimix Systems, Inc. Apparatus and method for dispensing an individual beverage serving
US5018646A (en) * 1988-11-23 1991-05-28 S. C. Johnson & Son, Inc. Squeezable fluid container
US5419638A (en) * 1993-05-06 1995-05-30 Jamison; Mark D. Pressure sensitive gas valve for flexible pouch
US6260735B1 (en) * 2000-05-12 2001-07-17 Colgate-Palmolive Company Uniform dispensing dual chamber sachet
US6550493B2 (en) 2001-06-13 2003-04-22 Baxter International Inc. Vacuum demand valve
US6554023B2 (en) 2001-06-13 2003-04-29 Baxter International Inc. Vacuum demand flow valve
USD499793S1 (en) 2003-03-17 2004-12-14 Baxter International Inc. Valve
US6863261B2 (en) 2002-03-12 2005-03-08 Baxter International Inc. Valve stop
US20170043927A1 (en) * 2014-07-08 2017-02-16 Yushin Co., Ltd. Packaging bag

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899911A (en) * 1988-08-02 1990-02-13 Multimix Systems, Inc. Apparatus and method for dispensing an individual beverage serving
US5018646A (en) * 1988-11-23 1991-05-28 S. C. Johnson & Son, Inc. Squeezable fluid container
US5419638A (en) * 1993-05-06 1995-05-30 Jamison; Mark D. Pressure sensitive gas valve for flexible pouch
US6260735B1 (en) * 2000-05-12 2001-07-17 Colgate-Palmolive Company Uniform dispensing dual chamber sachet
US6672333B2 (en) 2001-06-13 2004-01-06 Baxter International Inc. Vacuum demand valve
US6554023B2 (en) 2001-06-13 2003-04-29 Baxter International Inc. Vacuum demand flow valve
US6604545B2 (en) 2001-06-13 2003-08-12 Baxter International Inc. Vacuum demand valve
US6648011B2 (en) 2001-06-13 2003-11-18 Baxter International Inc. Vacuum demand valve
US6550493B2 (en) 2001-06-13 2003-04-22 Baxter International Inc. Vacuum demand valve
US6679288B2 (en) 2001-06-13 2004-01-20 Baker International Inc. Vacuum demand valve
US6684903B2 (en) 2001-06-13 2004-02-03 Baxter International Inc. Vacuum demand valve
US6712095B2 (en) 2001-06-13 2004-03-30 Baxter International Inc. Vacuum demand valve
US6863083B2 (en) 2001-06-13 2005-03-08 Baxter International Inc. Vacuum demand flow valve
US6863261B2 (en) 2002-03-12 2005-03-08 Baxter International Inc. Valve stop
USD499793S1 (en) 2003-03-17 2004-12-14 Baxter International Inc. Valve
US20170043927A1 (en) * 2014-07-08 2017-02-16 Yushin Co., Ltd. Packaging bag
US10040616B2 (en) * 2014-07-08 2018-08-07 Yushin Co., Ltd. Packaging bag

Also Published As

Publication number Publication date
EP0334839A1 (en) 1989-10-04
EP0334839A4 (en) 1990-02-22
KR880701667A (en) 1988-11-04
JPH01501056A (en) 1989-04-13

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