US20120273452A1 - Combined lip and shoulder seal for threaded cap - Google Patents

Combined lip and shoulder seal for threaded cap Download PDF

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Publication number
US20120273452A1
US20120273452A1 US13/520,638 US201113520638A US2012273452A1 US 20120273452 A1 US20120273452 A1 US 20120273452A1 US 201113520638 A US201113520638 A US 201113520638A US 2012273452 A1 US2012273452 A1 US 2012273452A1
Authority
US
United States
Prior art keywords
cap
lip
opening
bottle
shoulder
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
US13/520,638
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English (en)
Inventor
Daniel P. Soehnlen
Gregory M. Soehnlen
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.)
Creative Edge Design Group Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US13/520,638 priority Critical patent/US20120273452A1/en
Assigned to CREATIVE EDGE DESIGN GROUP, LTD reassignment CREATIVE EDGE DESIGN GROUP, LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SOEHNLEN, DANIEL P., SOEHNLEN, GREGORY M.
Publication of US20120273452A1 publication Critical patent/US20120273452A1/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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/08—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures
    • B65D47/0804—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having articulated or hinged closures integrally formed with the base element provided with the spout or discharge passage
    • B65D47/0833—Hinges without elastic bias
    • B65D47/0838—Hinges without elastic bias located at an edge of the base element
    • 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • 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
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B65D47/04—Closures with discharging devices other than pumps
    • B65D47/06—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10—Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B65D47/103—Membranes with a tearing element

Definitions

  • Blow molded containers or bottles are used for a wide variety of fluid products, and find particular use in the dairy industry for milk, juices, flavored waters, etc.
  • the bottle typically includes a raised shoulder or neck surrounding an opening that is used for introducing or filling the fluid into the bottle, and likewise the same opening is oftentimes subsequently used for dispensing the fluid from the bottle.
  • the opening may be used for only one of filling or dispensing and, in either situation, a closure cap is typically positioned over the opening once the bottle has been filled.
  • the cap is internally threaded and cooperates with external threads on the neck that surround the bottle opening (see, for example, WO2008/091936 developed by the same inventors, the details of which are expressly incorporated herein by reference). It is desirable for the opening to be sealed from the external environment. This can be accomplished in a number of different ways. For example, a foil or gasket seal is commonly placed over the opening and secured to the bottle.
  • the foil seal represents extra material, i.e., the gasket or foil, as well as additional processing which includes associated equipment, material, and additional time in the processing line to secure the gasket/foil seal over the opening for use in conjunction with the cap.
  • an internal surface of the cap includes a series of closely spaced concentric ribs, i.e., a series of concentric projecting surfaces, placed under axial compression as the ribs are essentially compressed or crushed against an outer radial surface of the neck as a result of imposing a high torque on the cap as the cap is threaded onto the bottle.
  • the material used is preferably a softer material that is capable of being compressed, for example a polypropylene is commonly used. This arrangement does not provide a tamper evident feature.
  • the torque developed between the neck and cap may be insufficient to develop the desired force to compress the ribs and provide an effective seal.
  • an imperfect neck finish e.g., a burr or flash remaining on the neck
  • the cap does not properly seal to the bottle.
  • An alternative manner of sealing the bottle is to use a flexible flap that extends from the internal surface of the cap and forms an interference seal with a shoulder on the bottle neck.
  • the flap extends downwardly from the inner surface of the cap, and has an outer radial dimension greater than an inner diameter of the bottle opening.
  • the cross-sectional thickness of the flap preferably decreases as the flap extends outwardly from the cap.
  • a distal end of the flap is positioned for receipt within the neck that forms the opening of the bottle and advantageously centers or orients the cap in place on the neck.
  • a softer material such as a polypropylene is commonly used for a cap of this type in order to provide sufficient flexibility to the flap as the flap is urged into sealing engagement with the inner wall surface of the shoulder that forms the opening.
  • This seal arrangement also requires a precise fit or else the flap is not properly oriented relative to the neck and there is no other structure in the arrangement that holds or guides the flap into the correct location. Further, this seal arrangement does not provide tamper evidence.
  • An improved cap is provided that provides an effective seal with the bottle opening, and substantially decreases the cost per cap.
  • the cap includes a generally planar surface that overlies the bottle opening.
  • a sidewall extends from the planar surface and surrounds the bottle opening.
  • the lip extends from the planar surface and is directed inwardly from the side wall for receipt in the bottle opening.
  • a shoulder extends outwardly from the planar surface and is spaced laterally or radially inwardly from the lip for engaging the seal lip.
  • the lip has a variable thickness along the length thereof.
  • the cap is preferably formed of a rigid plastic such as HDPE.
  • the shoulder extends outwardly from the generally planar surface a dimension less than the lip extends outwardly from the same surface.
  • a stop surface may be provided on the cap to operatively engage a corresponding stop shoulder on the bottle to limit or define a maximum force imposed on the lip and shoulder.
  • a pour opening may be incorporated into the generally planar member, and a closure lid hinged to the cap.
  • the pour opening includes a thin-walled tamper-evident member that is integrally molded with the generally planar member.
  • a primary advantage associated with the present disclosure is the improved sealing associated with the new cap.
  • Another advantage residing in this disclosure relates to the substantially reduced costs to manufacture.
  • Still another benefit is associated with the reduced quality required of the neck finish.
  • Yet another advantage resides in the elimination of components (such as a separate gasket or foil seal) as well as reduced processing time in the manufacture of the bottle.
  • Yet another advantage is associated with the ability to provide a tamper-evident feature without additional costs.
  • FIG. 1 is a cross-sectional view of a portion of a bottle neck and associated cap of a prior art arrangement.
  • FIG. 2 is a cross-sectional view of a portion of a cap of yet another prior art arrangement.
  • FIG. 3 is a perspective view of the new cap with a hinged lid shown in an open position.
  • FIG. 4 is a plan view of an outer surface of the cap of FIG. 3 .
  • FIG. 5 is cross-sectional view through the new cap taken generally along the lines 5 - 5 of FIG. 4 .
  • FIG. 6 is an enlarged sectional view of the encircled region of FIG. 5 .
  • FIG. 7 is an enlarged view similar to FIG. 6 but illustrating the cap secured to the bottle.
  • FIGS. 8-10 illustrate plan, elevational, and cross-sectional views of a tear away panel that may be included in the cap.
  • FIG. 1 is an enlarged, cross-sectional view of a portion of a cap received on the neck of a known bottle 100 .
  • the bottle or container 100 is preferably a thin-walled blow molded plastic bottle as is conventionally used in the dairy industry.
  • the bottle has a weight-to-volume ratio on the order of sixty to seventy grams per gallon and an average wall thickness on the order of 0.010-0.015 millimeters, although the weight-to-volume ratio may be different without departing from the scope and intent of the present disclosure.
  • the bottle includes an opening 102 formed by a neck or wall 104 that oftentimes protrudes outwardly from a surface 106 of the bottle.
  • the neck typically includes a thread portion such as helically extending thread portions 108 that extend at least partially about a circumference or outer surface 110 of wall 104 of the neck.
  • An inner surface 120 of wall 104 defines the opening 102 through the bottle.
  • the opening is advantageously used to fill the fluid contents into the bottle, and is oftentimes used to also serve as the pour opening for selectively dispensing the fluid contents from the bottle.
  • the inner surface 120 forms a sharp corner or edge 122 with an upper surface 124 of the wall 104 .
  • the sharply defined edge 122 is dimensioned for engagement with flap 140 that extends outwardly from cap 142 , particularly the planar portion 144 thereof.
  • the flap typically depends from an underside surface of the planar portion 144 at a region spaced radially inward from sidewall 146 of the cap.
  • the sidewall likewise includes a thread portion 148 such as the internal thread portions that cooperate with the external thread portion 108 of the neck.
  • the flap 140 and particularly surface 150 thereof, engages the sharp edge 122 of the shoulder. Further axial advancement of the cap onto the shoulder by rotating the cap onto the bottle results in further deflection of the lip 140 and sealing engagement with the edge 122 and interior surface of the neck.
  • FIG. 2 An alternative arrangement is shown in FIG. 2 .
  • like reference numerals will refer to like components, while new reference numerals will identify new components.
  • the flap is eliminated in this embodiment, and instead a gasket or series of ribs 170 extend axially inward from the inner face of planar member 144 , at a location spaced radially inward from the sidewall 146 of the cap.
  • the cap is preferably internally threaded as represented by reference numeral 148
  • the shoulder/wall 104 is preferably externally threaded as represented by thread portions 108 .
  • cap 190 is formed entirely of a high density polyethylene, a preferred material of construction. Even using this harder material, the cap is able to effectively seal along an inside region of the neck of the bottle opening.
  • Cap 190 includes a planar portion 192 and sidewall 194 that is disposed substantially perpendicular to the planar portion.
  • the sidewall is preferably internally threaded as represented by threaded region 196 (such as a helical thread) that cooperates with external threaded portion 108 of the shoulder/wall 102 in much the same manner as described above with respect to the prior art arrangements.
  • a seal flap 200 (sometimes referred to as a flapper valve) extends downwardly from the cap, preferably from the interior face of planar region 192 , at a region spaced radially inward from the interior surface of the cap sidewall 194 .
  • the flap 200 has a tapering conformation in the preferred arrangement that decreases in thickness as it extends away from the planar portion 192 to an outer terminal end 202 . This tapering conformation provides greater flexibility to the flap adjacent its outer terminal end.
  • the interconnecting region of the flap with the interior surface of the cap is preferably spaced radially inward from the sidewall 194 to accommodate the cross-sectional thickness of the shoulder 120 extending from the bottle.
  • the interconnecting region of the flap with the cap interior surface is spaced approximately 0.110 inches from the inner surface of the cap sidewall and the terminal and of the flap in an un-deflected state is spaced a greater distance from the cap sidewall inner surface.
  • the terminal end 202 is spaced approximately 0.117 inches from the cap sidewall inner surface, although these dimensions are meant to be exemplary only and not limiting.
  • the general purpose of the inward bend and the tapering conformation of the flap is to provide centering of the seal flap/cap relative to the bottle opening as the cap is threaded onto the bottle shoulder and the cap axially advances onto the shoulder.
  • the seal assembly of the present disclosure also includes a rigid pinch rib or shoulder 210 that is disposed radially inward of the flap. Particularly, the rib is spaced by radial gap 212 from the flap.
  • the pinch rib extends generally normally outward from the underside or interior surface of the cap planar portion at a substantially reduced height relative to the height of the flap. As shown in FIGS. 6 and 7 , the rigid pinch rib has a height approximately one-half the height of the flap.
  • the pinch rib is also illustrated as merging into a central depressed region on the cap although it will be appreciated that the rib can also be formed as an annular projection extending from the underside of the cap and over a limited radial extent if so desired.
  • the rigid material of the cap that forms the pinch rib can handle substantial compressive forces.
  • an effective inner diameter seal is formed between the flap and the chamfer or tapered surface 214 of the bottle opening.
  • the chamfer 214 is provided along the upper, inner face of the shoulder 104 . That is, the chamfer 214 is preferably defined at the intersection or interface of wall/shoulder 102 and the upper surface 124 of the shoulder. Further inward deflection of the flap, however, is precluded by the abutting engagement between the flap 200 and the rigid pinch rib 210 .
  • the opposite or inner face of the flap sealingly engages with the pinch rib 210 is precluded.
  • the chamfer of the body shoulder serves as a self-centering or lead-in portion for the flap to assure proper location of the cap on the neck opening.
  • the pinch rib 210 serves as a stop to limit the torque imposed on the flap.
  • the structure can be made so that the cap is never removed from the bottle. That is, it is contemplated that the opening may be used only for filling the bottle, the cap then positioned in place, and an anti-taper member or ring to 240 (shown in dotted line in FIG. 6 ) provided on the lowest extension of the sidewall 194 of the cap.
  • the anti-tamper ring 240 is secured by circumferentially spaced frangible portions 242 .
  • An undercut region 244 snaps into place over a radial protrusion 246 extending from the shoulder, but if the cap is subsequently removed from the shoulder, the frangible connections will break, and thus provide clear indication of attempted removal of the cap, i.e., tampering.
  • FIGS. 3-7 can also be used in a dispensing opening.
  • a pour opening and pour lip are provided in a hinged cap (see co-pending PCT application Serial No. PCT/US09/057336, filed 17 Sep. 2009, the disclosure of which is incorporated herein by reference).
  • the cap 190 includes an opening 300 that is selectively closed by hinged lid 302 , and particularly a seal member 304 that extends outwardly from the lid 302 for receipt in the opening 300 .
  • a removable or tear-away seal panel 310 in the cap (of the type generally shown and described in the co-pending PCT application identified above) is preferably integrally molded with the cap.
  • the panel 310 is segregated about a periphery by a frangible, thin walled portion 312 where the tear-away panel interconnects with the closing surface 314 of the cap.
  • a tab such as ring tab 320
  • ring tab 320 is secured to the tear-away panel 310 , and once a consumer opens the lid 302 of the cap assembly, by rotating the lid about the hinge 322 to an open position ( FIG. 8 ), the tab 320 is exposed and the consumer can remove the tear-away panel 310 by rupturing along the frangible connection. Once the tear-away panel is removed, the opening 300 is formed in the cap assembly.
  • seal 304 extending from the underside of the lid 302 is dimensioned for a sliding sealing fit as an original seal, and subsequent re-sealing of the contents of the fluid container.
  • Tamper-evident protection is also provided by way of the tear-away panel 310 , i.e., a consumer can readily recognize if the tear-away panel is missing and whether the contents of the container have been possibly compromised.
  • Use of the tear-away panel which may be easily removed by pulling on the ring tab 320 and removing the panel 310 from the remainder of the cap assembly 190 , advantageously eliminates the need for a separate foil seal, gasket, or similar structure.
  • each cap can be reduced by approximately fifty percent (50%) with the present cap, while still maintaining the ability to effectively seal along the inside of the neck, providing for tamper-evident capability, and providing an effective seal that allows substantial torque to be imposed on the cap to create the seal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US13/520,638 2010-01-06 2011-01-06 Combined lip and shoulder seal for threaded cap Abandoned US20120273452A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/520,638 US20120273452A1 (en) 2010-01-06 2011-01-06 Combined lip and shoulder seal for threaded cap

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US29271410P 2010-01-06 2010-01-06
PCT/US2011/020311 WO2011085061A1 (fr) 2010-01-06 2011-01-06 Combinaison de rebord et de joint d'épaulement pour bouchon fileté
US13/520,638 US20120273452A1 (en) 2010-01-06 2011-01-06 Combined lip and shoulder seal for threaded cap

Publications (1)

Publication Number Publication Date
US20120273452A1 true US20120273452A1 (en) 2012-11-01

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Application Number Title Priority Date Filing Date
US13/520,638 Abandoned US20120273452A1 (en) 2010-01-06 2011-01-06 Combined lip and shoulder seal for threaded cap

Country Status (7)

Country Link
US (1) US20120273452A1 (fr)
EP (1) EP2521673A4 (fr)
CN (1) CN102834330A (fr)
AU (1) AU2011203587A1 (fr)
CA (1) CA2786595A1 (fr)
MX (1) MX2012007949A (fr)
WO (1) WO2011085061A1 (fr)

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Publication number Priority date Publication date Assignee Title
JP2019077461A (ja) * 2017-10-23 2019-05-23 ホクト産業株式会社 食品容器用キャップ
USD900606S1 (en) 2018-03-02 2020-11-03 Berlin Packaging, Llc Closure
USD931101S1 (en) 2018-03-02 2021-09-21 Berlin Packaging, Llc Closure

Families Citing this family (3)

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SE537984C2 (sv) * 2014-02-07 2016-01-12 Cloz Man Ab Applikator för applicering av en produkt på huvudhår och färgningskit innefattande nämnda applikator
CH715394A1 (de) * 2018-09-28 2020-03-31 Alpla Werke Alwin Lehner Gmbh & Co Kg Kunststoffbehälter mit einem an einer Seitenwand anschliessenden Hals mit einer Ausgiessöffnung.
TWI741811B (zh) * 2020-09-28 2021-10-01 展絃科技有限公司 瓶口密封裝置

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019077461A (ja) * 2017-10-23 2019-05-23 ホクト産業株式会社 食品容器用キャップ
JP7091051B2 (ja) 2017-10-23 2022-06-27 ホクト産業株式会社 食品容器用キャップ
USD900606S1 (en) 2018-03-02 2020-11-03 Berlin Packaging, Llc Closure
USD931101S1 (en) 2018-03-02 2021-09-21 Berlin Packaging, Llc Closure

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MX2012007949A (es) 2012-10-03
CA2786595A1 (fr) 2011-07-14
AU2011203587A1 (en) 2012-08-09
WO2011085061A1 (fr) 2011-07-14
EP2521673A1 (fr) 2012-11-14
EP2521673A4 (fr) 2013-05-22
CN102834330A (zh) 2012-12-19

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