US20080002921A1 - Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates - Google Patents

Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates Download PDF

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Publication number
US20080002921A1
US20080002921A1 US11/898,041 US89804107A US2008002921A1 US 20080002921 A1 US20080002921 A1 US 20080002921A1 US 89804107 A US89804107 A US 89804107A US 2008002921 A1 US2008002921 A1 US 2008002921A1
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United States
Prior art keywords
pouch
indent
thin film
forming
stress
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/898,041
Inventor
Sanford Redmond
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to US11/898,041 priority Critical patent/US20080002921A1/en
Publication of US20080002921A1 publication Critical patent/US20080002921A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/321—Both sheets being recessed
    • 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
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • 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
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • 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
    • B29C51/00—Shaping 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
    • B29C51/14—Shaping 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 using multilayered preforms or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/003—Layered products comprising a metal layer

Definitions

  • pouch (sachet) style packages made of various very thin films, for example films of about 3 mils (0.003′′) and less in thickness, in a variety of combinations such as coextruded multi-layer plastics, metal foil/thermoformable plastics, etc.
  • one or more bulges can be formed in at least one of the walls of the pouch (sachet) style containment package to increase the volumetric capacity of the pouch and/or to reduce the amount of material used to contain a specific volume, which reduces the cost significantly without much loss of barrier qualities.
  • bulges may be thermoformed for totally plastic walls, or, in the case of metal foil/plastic laminated combinations, where the foil is very thin, for example on the order of 0.0003′′, air pressure forming has been the most efficient means.
  • the pre-heating for thermoforming is detrimental for foil/plastic combinations since it weakens the bond between the foil and the plastic film which the foil needs for support, and the foil ruptures in numerous stress cracks when being pressure formed. It has been further observed that the rounded ball corners of such bulges tend to thin out to where they also show stress cracks.
  • the invention is directed to a system which will relieve excessive thinning and stress cracking of such rounded ball corners.
  • the invention includes the formation of one or more stress-relieving formations in the bulge formation.
  • the stress-relieving formation is an indent in the wall of the bulge formation.
  • the stress-relieving formation is a bulge or protrusion extending from the bulge formation.
  • the stress-relieving formation may be a relatively shallow flat indented or protruded formation with semi-circular ends in the wall of the bulge formation.
  • FIG. 1 shows a pouch (sachet) with a bulge formation with a stress-relieving indent with semi-circular ends.
  • FIG. 2 shows another embodiment of a stress-relieving indent in the form of a channel with a semi-circular cross-section.
  • FIG. 3 shows another embodiment, with a plurality of stress-relieving indents.
  • FIG. 4 shows various shapes for stress-relieving indents, with FIG. 4A showing an alternative embodiment with the indent being a reverse indent or protrusion.
  • a typical pouch-style package is normally rectangular.
  • a bulge member 10 may be formed in one or more walls of the pouch. These bulges with or without indents may be utilized in ordinary rectangular pouches as currently available or with various patented easy opening pouches with a flap, or with a directional tear system.
  • the bulge member 10 may be parallel to the edge seals 20 with ball corners 12 .
  • an indent 30 with semi circular ends is formed in the wall of the pouch. The tiny wall of the indent relieves the stresses of forming the ball corners 12 by flattening out a little when the ball corners 12 are formed.
  • This indent system may further be utilized to reduce stresses and thinning in various other packaging and/or other uses which require formed thin wall systems.
  • the stress relieving indents may be of a variety of shapes. It may further be recognized that multiple indents of various or similar shapes may be applied to a single unit. The concept is that the indent yields additional material when the film/foil is being formed into a greater shape by flattening or deforming as the film is stretched, thereby yielding stress relief to the greater shape.
  • FIG. 2 shows another embodiment of a stress-relieving indent in the form of a channel with a semi-circular cross-section, as indicated by the line A-A′.
  • FIG. 3 shows another embodiment, with a plurality of stress-relieving indents, having a cross-section as indicated by the line B-B′.
  • FIG. 4 and FIG. 4A show various shapes for stress-relieving indents or protrusions.
  • the indent at C-C′ in FIG. 4 is a semi-circular indent.
  • FIG. 4A shows an alternative embodiment, in which the semi-circular indent in FIG. 4 is a reverse indent or protrusion.
  • the indent at C′′-C′′′ in such an alternative embodiment is a reverse indent or protrusion having a similar shape as the indent at C-C′.
  • the indent at D has a shape like a quarter-circle.
  • the indent at E-E′ has an oblong shape.
  • the indents at F-F′ and G-G′ are oblong in shape and crossed.
  • stress-relieving indent or protrusion may take a variety of shapes within the scope of the claims.

Abstract

A pouch-style package formed of thin film comprising a front wall, a back wall, edge seals joining the front wall and back wall, and at least one bulge formation formed in a wall of the pouch-style package, having a stress-relieving indent formed in the wall in which said bulge formation is formed, the stress-relieving indent providing material to relieve excessive thinning or stress cracking at corners of the bulge formation.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is a continuation of U.S. patent application Ser. No. 11/191,055, filed Jul. 28, 2005, and claims priority to U.S. Provisional Patent Application Ser. No. 60/591,623, filed Jul. 28, 2004, and U.S. Provisional Patent Application Ser. No. 60/598,064, filed Aug. 3, 2004, all of which are incorporated by reference herein.
    • BACKGROUND OF THE INVENTION
  • In the matter of pouch (sachet) style packages made of various very thin films, for example films of about 3 mils (0.003″) and less in thickness, in a variety of combinations such as coextruded multi-layer plastics, metal foil/thermoformable plastics, etc., it has been found that one or more bulges can be formed in at least one of the walls of the pouch (sachet) style containment package to increase the volumetric capacity of the pouch and/or to reduce the amount of material used to contain a specific volume, which reduces the cost significantly without much loss of barrier qualities. These bulges may be thermoformed for totally plastic walls, or, in the case of metal foil/plastic laminated combinations, where the foil is very thin, for example on the order of 0.0003″, air pressure forming has been the most efficient means. As a matter of fact, the pre-heating for thermoforming is detrimental for foil/plastic combinations since it weakens the bond between the foil and the plastic film which the foil needs for support, and the foil ruptures in numerous stress cracks when being pressure formed. It has been further observed that the rounded ball corners of such bulges tend to thin out to where they also show stress cracks.
    • SUMMARY OF THE INVENTION
  • The invention is directed to a system which will relieve excessive thinning and stress cracking of such rounded ball corners. The invention includes the formation of one or more stress-relieving formations in the bulge formation. In certain embodiments, the stress-relieving formation is an indent in the wall of the bulge formation. In other embodiments, the stress-relieving formation is a bulge or protrusion extending from the bulge formation. In one example, the stress-relieving formation may be a relatively shallow flat indented or protruded formation with semi-circular ends in the wall of the bulge formation.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a pouch (sachet) with a bulge formation with a stress-relieving indent with semi-circular ends.
  • FIG. 2 shows another embodiment of a stress-relieving indent in the form of a channel with a semi-circular cross-section.
  • FIG. 3 shows another embodiment, with a plurality of stress-relieving indents.
  • FIG. 4 shows various shapes for stress-relieving indents, with FIG. 4A showing an alternative embodiment with the indent being a reverse indent or protrusion.
    • DETAILED DESCRIPTION OF THE DRAWINGS
  • A typical pouch-style package is normally rectangular. A bulge member 10 may be formed in one or more walls of the pouch. These bulges with or without indents may be utilized in ordinary rectangular pouches as currently available or with various patented easy opening pouches with a flap, or with a directional tear system.
  • The bulge member 10 may be parallel to the edge seals 20 with ball corners 12. In the embodiment of FIG. 1, an indent 30 with semi circular ends is formed in the wall of the pouch. The tiny wall of the indent relieves the stresses of forming the ball corners 12 by flattening out a little when the ball corners 12 are formed.
  • This indent system may further be utilized to reduce stresses and thinning in various other packaging and/or other uses which require formed thin wall systems.
  • It may be seen that the stress relieving indents may be of a variety of shapes. It may further be recognized that multiple indents of various or similar shapes may be applied to a single unit. The concept is that the indent yields additional material when the film/foil is being formed into a greater shape by flattening or deforming as the film is stretched, thereby yielding stress relief to the greater shape.
  • FIG. 2 shows another embodiment of a stress-relieving indent in the form of a channel with a semi-circular cross-section, as indicated by the line A-A′.
  • FIG. 3 shows another embodiment, with a plurality of stress-relieving indents, having a cross-section as indicated by the line B-B′.
  • FIG. 4 and FIG. 4A show various shapes for stress-relieving indents or protrusions. The indent at C-C′ in FIG. 4 is a semi-circular indent. FIG. 4A shows an alternative embodiment, in which the semi-circular indent in FIG. 4 is a reverse indent or protrusion. As shown in FIG. 4A, the indent at C″-C′″ in such an alternative embodiment is a reverse indent or protrusion having a similar shape as the indent at C-C′. The indent at D has a shape like a quarter-circle. The indent at E-E′ has an oblong shape. The indents at F-F′ and G-G′ are oblong in shape and crossed.
  • It will be appreciated that the stress-relieving indent or protrusion may take a variety of shapes within the scope of the claims.

Claims (20)

1. A pouch-style package formed of thin film and containing a product to be dispensed, the pouch-style package formed by a process comprising the steps of:
providing a first thin film comprising laminated layers of metal foil and plastic;
providing a second thin film comprising laminated layers of metal foil and plastic;
forming a stress-relieving indent in at least the first thin film by air pressure forming;
sealing the first thin film to the second thin film at edge seals, the edge seals defining edges of the pouch-style package, wherein the pouch-style package comprises a first wall formed of the first thin film and a second wall formed of the second thin film, and wherein the first wall comprises the stress-relieving indent; and
forming a bulge formation in said first wall, wherein the step of forming a bulge formation includes the step of having the stress-relieving indent flatten or deform to facilitate the formation of the bulge formation in said first wall.
2. A pouch-style package as claimed in claim 1, wherein said bulge formation has corners and wherein the stress-relieving indent provides material to relieve excessive thinning or stress cracking at corners of the bulge formation.
3. A pouch-style package as claimed in claim 2, wherein the corners of the bulge formation are rounded ball corners.
4. A pouch-style package as claimed in claim 1, wherein the indent is a reverse indent so as to form a stress-relieving protrusion.
5. A pouch-style package as claimed in claim 1, wherein the indent is a relatively shallow flat indent with semi-circular ends.
6. A pouch-style package as claimed in claim 1, wherein the indent has a semi-circular cross-section.
7. A pouch-style package as claimed in claim 1, wherein the indent is oblong in shape.
8. A pouch-style package as claimed in claim 1, wherein the step of forming a bulge formation in said first wall takes place prior to sealing the first thin film to the second thin film.
9. A pouch-style package as claimed in claim 1, wherein the step of forming a bulge formation in said first wall takes place after sealing the first thin film to the second thin film.
10. A pouch-style package as claimed in claim 1, wherein the stress-relieving indent provides material to relieve excessive thinning or stress cracking in the bulge formation.
11. A process for forming a pouch-style package comprising the steps of:
providing a first thin film comprising laminated layers of metal foil and plastic;
providing a second thin film comprising laminated layers of metal foil and plastic;
forming a stress-relieving indent in at least the first thin film by air pressure forming;
sealing the first thin film to the second thin film at edge seals, the edge seals defining edges of the pouch-style package, wherein the pouch-style package comprises a first wall formed of the first thin film and a second wall formed of the second thin film, and wherein the first wall comprises the stress-relieving indent; and
forming a bulge formation in said first wall, wherein the step of forming a bulge formation includes the step of having the stress-relieving indent flatten or deform to facilitate the formation of the bulge formation in said first wall.
12. A process for forming a pouch-style package as claimed in claim 11, wherein said bulge formation has corners and wherein the stress-relieving indent provides material to relieve excessive thinning or stress cracking at corners of the bulge formation.
13. A process for forming a pouch-style package as claimed in claim 12, wherein the corners of the bulge formation are rounded ball corners.
14. A process for forming a pouch-style package as claimed in claim 11, wherein the indent is a reverse indent so as to form a stress-relieving protrusion.
15. A process for forming a pouch-style package as claimed in claim 11, wherein the indent is a relatively shallow flat indent with semi-circular ends.
16. A process for forming a pouch-style package as claimed in claim 11, wherein the indent has a semi-circular cross-section.
17. A process for forming a pouch-style package as claimed in claim 11, wherein the indent is oblong in shape.
18. A process for forming a pouch-style package as claimed in claim 11, wherein the step of forming a bulge formation in said first wall takes place prior to sealing the first thin film to the second thin film.
19. A process for forming a pouch-style package as claimed in claim 11, wherein the step of forming a bulge formation in said first wall takes place after sealing the first thin film to the second thin film.
20. A process for forming a pouch-style package as claimed in claim 11, wherein the stress-relieving indent provides material to relieve excessive thinning or stress cracking in the bulge formation.
US11/898,041 2004-07-28 2007-09-07 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates Abandoned US20080002921A1 (en)

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Application Number Priority Date Filing Date Title
US11/898,041 US20080002921A1 (en) 2004-07-28 2007-09-07 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates

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US59162304P 2004-07-28 2004-07-28
US59806404P 2004-08-03 2004-08-03
US11/191,055 US20060023975A1 (en) 2004-07-28 2005-07-28 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates
US11/898,041 US20080002921A1 (en) 2004-07-28 2007-09-07 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates

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US11/191,055 Continuation US20060023975A1 (en) 2004-07-28 2005-07-28 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates

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US11/898,041 Abandoned US20080002921A1 (en) 2004-07-28 2007-09-07 Stress relieving indent formation for very thin thermoformed plastic films or foil/plastic laminates

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110024462A1 (en) * 2004-01-02 2011-02-03 Sands Innovations Pty Ltd Dispensing Utensil
USD636890S1 (en) 2009-09-17 2011-04-26 Sands Innovations Pty. Ltd. Dispensing utensil
US8485360B2 (en) 2011-03-04 2013-07-16 Sands Innovations Pty, Ltd. Fracturable container
US8511500B2 (en) 2010-06-07 2013-08-20 Sands Innovations Pty. Ltd. Dispensing container
US8523016B2 (en) 2008-12-09 2013-09-03 Sands Innovations Pty Ltd. Dispensing container
US8919594B2 (en) 2007-01-31 2014-12-30 Sands Innovations Pty Ltd Dispensing container
USD739227S1 (en) * 2013-03-15 2015-09-22 The J.M. Smucker Company Container
USD744014S1 (en) * 2012-06-06 2015-11-24 Stephen S. Gleason Composite coring reinforcement material
USD913807S1 (en) * 2017-12-20 2021-03-23 Intercontinental Great Brands Llc Confectionery packaging
USD914327S1 (en) 2017-12-20 2021-03-30 Intercontinental Great Brands Llc Confection
USD948346S1 (en) 2018-06-25 2022-04-12 Intercontinental Great Brands Llc Confectionery packaging
USD953886S1 (en) 2018-05-11 2022-06-07 Intercontinental Great Brands Llc Confectionery packaging

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US4899976A (en) * 1988-04-29 1990-02-13 Arctic Icewater, Inc. Ice cube tray
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US5511697A (en) * 1994-12-19 1996-04-30 The Procter & Gamble Company Reclosable pouch and method of construction
US5954204A (en) * 1995-10-20 1999-09-21 Phatmacia & Upjohn Company Blister package
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US1853374A (en) * 1930-04-05 1932-04-12 Orenda Corp Cushioning panel
US3367380A (en) * 1964-03-05 1968-02-06 Dev Consultants Inc Collapsible container
US4429792A (en) * 1981-09-11 1984-02-07 Medication Services, Inc. Medication-dispensing card
US4574954A (en) * 1984-12-07 1986-03-11 Medication Services Inc. Pill dispenser
US5205650A (en) * 1988-04-18 1993-04-27 Rasmussen O B Tubular bag with shock absorber band tube for making such bag, and method for its production
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8091242B2 (en) 2004-01-02 2012-01-10 Sands Innovations Pty Ltd Dispensing utensil
US8528736B2 (en) 2004-01-02 2013-09-10 Sands Innovations Pty Ltd. Frangible container with hinge cover
US20110024462A1 (en) * 2004-01-02 2011-02-03 Sands Innovations Pty Ltd Dispensing Utensil
US8919594B2 (en) 2007-01-31 2014-12-30 Sands Innovations Pty Ltd Dispensing container
US8523016B2 (en) 2008-12-09 2013-09-03 Sands Innovations Pty Ltd. Dispensing container
USD636890S1 (en) 2009-09-17 2011-04-26 Sands Innovations Pty. Ltd. Dispensing utensil
US8511500B2 (en) 2010-06-07 2013-08-20 Sands Innovations Pty. Ltd. Dispensing container
US8485360B2 (en) 2011-03-04 2013-07-16 Sands Innovations Pty, Ltd. Fracturable container
USD744014S1 (en) * 2012-06-06 2015-11-24 Stephen S. Gleason Composite coring reinforcement material
USD739227S1 (en) * 2013-03-15 2015-09-22 The J.M. Smucker Company Container
USD913807S1 (en) * 2017-12-20 2021-03-23 Intercontinental Great Brands Llc Confectionery packaging
USD914327S1 (en) 2017-12-20 2021-03-30 Intercontinental Great Brands Llc Confection
USD915880S1 (en) * 2017-12-20 2021-04-13 Intercontinental Great Brands Llc Confectionery packaging
USD927987S1 (en) 2017-12-20 2021-08-17 Intercontinental Great Brands Llc Confectionery packaging
USD939185S1 (en) 2017-12-20 2021-12-28 Intercontinental Great Brands Llc Confection
USD953886S1 (en) 2018-05-11 2022-06-07 Intercontinental Great Brands Llc Confectionery packaging
USD948346S1 (en) 2018-06-25 2022-04-12 Intercontinental Great Brands Llc Confectionery packaging

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WO2006015095A2 (en) 2006-02-09
WO2006015095A3 (en) 2006-12-07
EP1778552A2 (en) 2007-05-02
US20060023975A1 (en) 2006-02-02
EP1778552A4 (en) 2009-06-10

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