EP1976767A1 - Emballage contenant / fermeture à étanchéité améliorée - Google Patents

Emballage contenant / fermeture à étanchéité améliorée

Info

Publication number
EP1976767A1
EP1976767A1 EP06830672A EP06830672A EP1976767A1 EP 1976767 A1 EP1976767 A1 EP 1976767A1 EP 06830672 A EP06830672 A EP 06830672A EP 06830672 A EP06830672 A EP 06830672A EP 1976767 A1 EP1976767 A1 EP 1976767A1
Authority
EP
European Patent Office
Prior art keywords
container
closure
taper
wall
channel
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Withdrawn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
EP06830672A
Other languages
German (de)
English (en)
Inventor
Galen German
James L Martin
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.)
Crown Packaging Technology Inc
Original Assignee
Crown Packaging Technology 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 Crown Packaging Technology Inc filed Critical Crown Packaging Technology Inc
Publication of EP1976767A1 publication Critical patent/EP1976767A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/14—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars
    • B65D51/145—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars by means of an additional element connected directly to the container
    • 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
    • B65D45/00—Clamping or other pressure-applying devices for securing or retaining closure members
    • B65D45/02—Clamping or other pressure-applying devices for securing or retaining closure members for applying axial pressure to engage closure with sealing surface
    • B65D45/30—Annular members, e.g. with snap-over action or screw-threaded

Definitions

  • This invention relates to a container and closure package and more particularly to a container and closure package configuration for improving sealing, and method of making such a package.
  • Container threads may be formed during injection moulding of a preform for a container or may be formed during blow moulding of an injection moulded or extruded preform.
  • the process for forming blow-moulded threads often includes forming an intermediate article that includes a structure above the container finish.
  • Patent Citation 0001 US 6228317 B -. discloses a moil stricture, formed during blow moulding, that is severed from the container.
  • a goal of the present invention is to provide a package including a container and composite closure having improved sealing capabilities and a corresponding method for manufacture of such a package.
  • a retortable package according to the invention includes a container and a composite closure.
  • the container includes a finish portion that terminates in an opening having a peripheral circular lip.
  • a taper is formed on an internal surface of the finish portion and this taper merges into the lip.
  • the taper in transverse cross section forms an angle of 6° to 14° to the vertical.
  • the closure includes a circular skirt, an insert disk, and a sealant.
  • the insert disk includes a peripheral bead, a raised channel inboard of the peripheral bead and a circular centre portion inboard of the channel.
  • the raised channel has an outer wall, a substantially flat top portion, and an inner wall sloped at approximately the same angle as the taper angle of the container finish portion.
  • Sealant is disposed in the channel and is at least partially deformed upon ap- plication of the closure to the container.
  • the sealant forms a seal between the closure and each of (i) an outer wall of the finish portion proximate the lip, (ii) the lip, and (iii) the taper.
  • the seal between the finish portion taper and the channel inner wall is enhanced by the contraction of the finish portion diameter.
  • the sealant is groove-less prior to application of the closure to the container.
  • the taper on the finish portion of the container is preferably spaced apart from the channel inner wall of the closure by a gap of between 0.13 mm and 0.38 mm (0.005" and 0.015") prior to retorting.
  • this gap is reduced to between 0 mm and 0.38 mm (0.00" and 0.015") more preferably between 0.051 mm and 0.25 mm (0.002" and 0.010") and most preferably between 0.076 mm and 0.20 mm (0.003" and 0.008").
  • the slope of the inner wall of the channel preferably defines a first point on the inner wall proximate the top portion and a second point on the inner wall proximate its centre portion.
  • the uppermost portion of the container lip preferably forms and angle of between 1° and 12° from the horizontal, more preferably between 2° and 8° from the horizontal and most preferably between 2° and 5° from the horizontal.
  • a method of forming a container / closure package including the steps of:
  • the preferred composite closure employed in this method includes a circular skirt, an insert disk, and a sealant.
  • the insert disk includes a peripheral bead, a raised channel inboard of the peripheral bead, and a circular centre portion inboard of the channel.
  • the raised channel includes an outer wall, a substantially flat top portion, and an inner wall sloped at approximately the same angle as the taper angle.
  • the sealant is disposed in the channel.
  • FIG. 1 (Prior At) is a cross section view of a container / closure package including a container and composite closure;
  • FIG. 1 is a cross section view of a container package including a container and composite closure illustrating an embodiment of the present invention
  • [fig.] Figure 3 is an enlarged view of a portion of the package shown in [fig.] Figure 2.
  • FIG. 1 illustrates the potential problems with prior art container / closure packages and related methods of manufacture.
  • a prior art container and composite closure package 110 includes prior art container 112 and composite closure 140.
  • Container 112 includes threads 122 formed on an outboard side of the finish and a lip 126 at the uppermost portion of the finish.
  • Closure 140 includes a plastic band 142 and a metal disk 144.
  • Disk 144 includes a peripheral bead or curl 160, a downwardly facing raised channel 162, and a centre portion 164.
  • Sealant 174 is disposed in channel 162.
  • sealant 174 is groove-less prior to application of the closure to the container.
  • container threads 122 are formed by blow-moulding or injection moulding.
  • a projection 113 which protrudes substantially radially inwardly from lip
  • 126 is the lower portion of a stricture formed to locate a blade in a moil trimming operation.
  • Patent Citation 0002 US 6228317 B -. describes the forming of the container lip and illustrates an inward projection sirh as projection 113. Because lip 126 is pressed into sealant 174, projection 113 inhibits or prevents the flow of sealant 174 toward the inner surface of the container neck, which diminishes or prevents sealing or sealing contact at the container neck, especially at the inner surface.
  • a container / closure package 10 includes a container 12 and composite closure 40.
  • Closure 40 is provided to illustrate an embodiment of the present invention, and the present invention is not limited to any particular type or material of closure, nor is it limited to any particular closure configuration, and includes for example closures formed in one piece.
  • Container 12 has a sidewall 14 that forms an enclosed bottom portion (not shown in the figures).
  • a finish portion 16 extends upwardly from sidewall 14 and includes, in transverse cross section, an outboard side 18 and an inboard side 20.
  • Container threads 22 are formed on the outboard side 18 of the finish portion 16.
  • the threads 22 of container 12 are formed by a blow-moulding process.
  • outboard side 18 includes an upper outer sidewall 24 that slopes toward a lip 26.
  • container 12 is formed of a thermoplastic, such as polypropylene, or other material suitable for retorting or like heat treatment.
  • Lip 26 includes an outer curved transition portion 30 and an inner curved transition portion 32.
  • an upper face 34 is disposed between curved transition portions 30 and 32.
  • Upper face 34 may be substantially planar in transverse cross section or may be curved.
  • Transition portions 30 and 32 may be defined by a single radius or multiple radii or may be a substantially flat bevel or like configuration lacking curved surfaces. Transition portion 30 need not have the same configuration as that of transition portion 32.
  • Inner transition portion 32 yields to a taper 36, which merges into the inner surface 38 of the finish portion.
  • upper face 34 is sloped inwardly and downwardly at an angle C and preferably is straight in transverse cross section.
  • angle C is between 1° and 12° from a horizontal line H, more preferably, between 2° and 8°, most preferably between 2° and 5°.
  • the present invention also encompasses an upper face of the finish having a substantially horizontal top as well as an upper face formed of a curve or curves, multiple straight portions, or a combination thereof (not shown in the figures).
  • the angle C may be measured from an outermost point of the upper face to an innermost point of the upper face.
  • taper 36 (as shown in Figures 2 and 3) is formed by a reaming process that removes projection 113.
  • Taper 36 is substantially flat in transverse cross section or frustoconical and inclined from a vertical line at an angle A.
  • angle A is between 6° and 14°.
  • the present invention encompasses configurations of the portion between transition portion 32 and container inner surface 38 other than flat, such as curves, multiple flat surfaces, or a combination thereof.
  • Such alternative configurations are encompassed by the term "taper" as used herein.
  • the angle A may be measured between an upper point where the taper meets transition portion 32 and a lower point where the taper meets inner surface 38.
  • Composite closure 40 includes a band 42, which preferably is formed of a plastic, and an insert disk 44, which preferably is formed of a metal.
  • Band 42 includes a skirt 46 and a flange 48 extending radially inwardly from an upper portion of skirt 46.
  • a tamper evident band 50 extends from a lower portion of skirt 46.
  • An inboard surface of skirt 46 includes closure threads 52 and, preferably, a retaining bead 54 that is spaced apart from disk 44 when the closure is applied to the container.
  • Pads 56 are formed on the underside of the flange 48 and the space between the pads 56 and retaining bead 54 enables disk 44 to float during application and removal of closure 40. Floating disk 44 enables the initial unscrewing of closure 40 to occur in sequence. First, a torque is required to disengage closure threads 54 from container threads 22, then a torque is required to breake the frangible bridges of the tamper evident band 50 and then retaining bead 54 urges upwardly against disk 44 as the closure 40 is unscrewed.
  • the present invention is not limited to sequential opening configurations, but sirh configuration is employed for illustration. For example, the present invention may be employed with closure / container combinations that employ ratchets rather than spaced pads.
  • Disk 44 includes a peripheral bead 60, a downwardly-opening channel 62 disposed radially inward of bead 60 and a circular centre portion 64 disposed radially inward of channel 62.
  • Channel 62 is composed by an outer wall 66, a top 68 extending from outer wall 66 and an inner wall 70 extending from top 68.
  • top 68 is linear in transverse cross section.
  • Top 68 may be sloped inwardly and downwardly at an angle sirh that top 68 forms a frustum of a cone.
  • the angle C is between 1° and 12° from a horizontal line H, more preferably, between 2° and 8°, most preferably between 2° and 5°.
  • the angle of slope of top 68 matches angle C of container upper surface 34, and the shape in transverse cross section of top 68 matches that of upper surface 34.
  • the present invention also encompasses a channel having a substantially horizontal top and a curved top (not shown in the figures).
  • channel inner wall 70 forms an angle B with the vertical.
  • inner wall 70 is straight-sided in transverse cross section.
  • the invention encompasses a curved or irregularly-shaped wall, in which configuration angle B may be measured between a first point on inner wall 70 proximate a transition to top 68 and a second point on inner wall 70 proximate centre portion 64.
  • channel inner wall angle B is substantially the same as that angle A of taper 36.
  • Gap G for the embodiment illustrated may be 0 mm to 0.51 mm (0.000 to 0.020") preferably between 0 mm and 0.38 mm (0.00" and 0.015") more preferably between 0.05 mm and 0.25 mm (0.002" and 0.010") and most preferably between 0.076 mm and 0.20 mm (0.003" and 0.008").
  • the container 12 often is not circular after retorting and gap G may vary around the circumference. Accordingly, the dimensions quoted above for gap G are averages.
  • Sealant 74 forms an outside seal against an outboard side of finish portion 16 (preferably on transition 30 and outboard side 18) a top seal against upper face 34, and an inboard seal against an inboard side of finish portion 16 (preferably on transition 32 and taper 36).
  • the inside seal is enhanced because projection 113 from the moil trimming operation has been removed upon formation of the taper 36.
  • package 10 may be subjected to retorting, pasteurizing, or other sterilizing or heat-treatment step, the plastic material of container 12 may shrink upon application of heat while the metal disk maintains its dimensions.
  • the inner radius, shown schematically as dimension R in Figure 2, of container 12 will diminish after such heating step and the gap (dimension G) will decrease, thereby enhancing the inner seal.
  • the present invention also encompasses a method of forming a container package having an improved seal.
  • container 12 is provided with a moil (not shown in the figures) that is removed by a moil trimming operation.
  • Patent Citation 0003: US 5617768 B -. discloses apparatus and methods for moil trimming.
  • the interior portion of the container neck is reamed to form a taper 36 on an interior portion of the finish.
  • a composite closure 40 is applied to container 12 and the sealant 74 is deformed by the container finish portion 16.
  • sealant 74 forms a seal against each of (i) an outer wall of the finish portion 16 proximate the lip 26, (ii) the lip 26, and (iii) the taper 36, as described above.
  • Container / closure package 10 is retorted or otherwise heat treated such that container finish 16 decreases in diameter to diminish the gap G between the finish portion taper 36 and channel inner wall 70 to enhance the seal therebetween.
  • container / closure package such as the retorting process or like heat treatment, the formulation and processing of the container such that it is suitable for reforming, manufacture and well-known structure and functional aspects of the closure and methods and apparatus for the reaming processes are all understood by persons familiar with container and£>r closure manufacture, and any of such processes may be applied to produce the structure described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

La présente invention concerne un emballage « contenant / fermeture » 10 comprenant un contenant 12 et une fermeture 40 composite. Le contenant 12 comprend une partie de finition 16 qui se termine par une ouverture pourvue d’une lèvre circulaire périphérique 26. Une conicité 36 est formée sur une surface interne de la partie de finition 16, ladite conicité 36 se combinant à la lèvre 26. La fermeture 40 comprend une jupe ou bande circulaire 42, un disque d’insertion 44 et un matériau d’étanchéité 74. Le disque d’insertion 44 comprend un bourrelet périphérique 60, un passage rehaussé 62 à l’intérieur du bourrelet périphérique et une partie centrale circulaire 64 à l’intérieur du passage. Le passage rehaussé 62 possède une paroi externe 66, une partie supérieure sensiblement plate 68, et une paroi interne 70 dont l’inclinaison suit un angle presque similaire à l’angle de conicité de la partie de finition 16 du contenant.
EP06830672A 2005-12-30 2006-12-15 Emballage contenant / fermeture à étanchéité améliorée Withdrawn EP1976767A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75503105P 2005-12-30 2005-12-30
PCT/EP2006/069790 WO2007077110A1 (fr) 2005-12-30 2006-12-15 Emballage contenant / fermeture à étanchéité améliorée

Publications (1)

Publication Number Publication Date
EP1976767A1 true EP1976767A1 (fr) 2008-10-08

Family

ID=37808149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830672A Withdrawn EP1976767A1 (fr) 2005-12-30 2006-12-15 Emballage contenant / fermeture à étanchéité améliorée

Country Status (5)

Country Link
US (1) US20070163988A1 (fr)
EP (1) EP1976767A1 (fr)
AR (1) AR066179A1 (fr)
CA (1) CA2628619A1 (fr)
WO (1) WO2007077110A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018106314A1 (de) * 2018-03-19 2019-09-19 Saier Verpackungstechnik Gmbh & Co. Kg Sicherungsring zur Transportsicherung eines Deckels und Gebinde

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH657589A5 (de) * 1981-11-19 1986-09-15 Ernst & Co Inh Geiger & Neuens Schraubdeckel mit innen- und aussendeckel.
US4991731A (en) * 1989-08-03 1991-02-12 Abbott Laboratories/Ross Laboratories Retortable composite closure for plastic containers
US5346082A (en) * 1992-06-12 1994-09-13 Anchor Hocking Packaging Co. Composite closure with sealing force indicating means and ratchet operated tamper indicating band
US5617768A (en) * 1995-05-11 1997-04-08 M.C. Molds Inc. Trimmer for removing scraping from tops of plastic bottles
US5839592A (en) * 1995-06-09 1998-11-24 Anchor Hocking Packaging Co. Plastic closure
US6228317B1 (en) * 1998-07-30 2001-05-08 Graham Packaging Company, L.P. Method of making wide mouth blow molded container
US6662958B2 (en) * 2002-01-31 2003-12-16 Crown Cork & Seal Technologies Corporation Composite closure having disk tightening feature
PL379738A1 (pl) * 2003-08-26 2006-11-13 Crown Packaging Technology Inc Zamknięcie złożone mające wkładkę z obwodowym podwinięciem

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007077110A1 *

Also Published As

Publication number Publication date
US20070163988A1 (en) 2007-07-19
CA2628619A1 (fr) 2007-07-12
AR066179A1 (es) 2009-08-05
WO2007077110A8 (fr) 2008-08-28
WO2007077110A1 (fr) 2007-07-12

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