EP0136088B1 - Improvements relating to container closures - Google Patents

Improvements relating to container closures Download PDF

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Publication number
EP0136088B1
EP0136088B1 EP84305822A EP84305822A EP0136088B1 EP 0136088 B1 EP0136088 B1 EP 0136088B1 EP 84305822 A EP84305822 A EP 84305822A EP 84305822 A EP84305822 A EP 84305822A EP 0136088 B1 EP0136088 B1 EP 0136088B1
Authority
EP
European Patent Office
Prior art keywords
fin
end portion
free end
closure
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84305822A
Other languages
German (de)
French (fr)
Other versions
EP0136088A3 (en
EP0136088A2 (en
Inventor
John Harry Guest
James Frederick Herbert
Peter Reginald Haines
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.)
Arconic Closure Systems International UK Ltd
Original Assignee
Metal Closures Ltd
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
Priority claimed from GB838323037A external-priority patent/GB8323037D0/en
Priority claimed from GB838327991A external-priority patent/GB8327991D0/en
Application filed by Metal Closures Ltd filed Critical Metal Closures Ltd
Priority to AT84305822T priority Critical patent/ATE40327T1/en
Publication of EP0136088A2 publication Critical patent/EP0136088A2/en
Publication of EP0136088A3 publication Critical patent/EP0136088A3/en
Application granted granted Critical
Publication of EP0136088B1 publication Critical patent/EP0136088B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • 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
    • B65D41/0428—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a collar, flange, rib or the like contacting the top rim or the top edges or the external surface of a container neck

Definitions

  • This invention relates to container closures.
  • GB-A-1602746 and US-A-4072244 each disclose a container closure moulded in one piece from a plastics material and comprising a top, a dependent skirt the radially inner surface of which is formed with a screw-thread, a surface which is flared in a direction away from the top being formed on the internal surface of the skirt where it joins the top, and an annular resiliently flexible fin extending downwardly and outwardly from the underside of the top at a position spaced radially inwardly of said flared surface and having a length such as to permit at least its portion adjoining its free edge to lie against said flared surface when the fin is deformed outwardly by the top of the neck of a container to which the closure is to be applied and to extend round the outer corner portion of the neck of a co-operating container.
  • the free end portion of the fin is thicker than the main body of the fin.
  • the free end portion may be thus thickened by reason of the provision of a peripheral rib formed locally on either the radially inner surface or the radially outer surface of said free end portion.
  • the thickening of the free end portion serves to reduce the tensile stress in the fin when the closure is applied and in consequence to reduce the degree of extension of the free end portion of the fin so that a greater part of the length of the fin tends to hug the outer corner portion of the neck more closely and thus improves the seal.
  • a peripheral rib is formed on the radially inner surface of the fin, the rib may itself form with the neck of the container or additional line seal about the neck.
  • the flared surface may engage the rib and press the free end portion of the fin towards the neck of the container, preferably at a position slightly below the outer corner portion of the neck.
  • said flared surface is conical and is inclined at 45° or less to the central axis of the closure. In one example the angle is 30°.
  • the fin may also be conical and may extend parallel to said flared surface.
  • the radially inner surface of the fin may have a plurality of annular grooves formed therein, each pair of adjacent grooves defining between them an annular rib of triangular cross-section.
  • the grooves may be triangular and of buttress section, and the buttress face of the groove may face towards or away from the top to form a rib or ribs suitable for use with containers for materials under vacuum or under pressure, or may be of other triangular shape such as isosceles or equilateral triangular shape to form a rib or ribs of other required cross-sectional shape.
  • the closure 10 is moulded in one piece from a resilient plastics material and has a top 11 and a dependent skirt 12 formed with an internal screw-thread 13 and external knurling 14.
  • the corner region 15 at the upper end of the skirt is thickened and has a conically flared internal surface 16 extending at an angle of 30° to the central axis 17 of the closure.
  • Spaced radially inwardly of the surface 16 is a flexible resilient annular fin 18 of uniform thickness which extends from the underside of the top and substantially parallel to the surface 16.
  • the fin 18 has a main body of uniform thickness but has its free end portion of the fin thickened by reason of the formation of a broad flat-topped rib 30 on the radially inner surface of the end portion.
  • the top 21 of the neck of the container deforms the fin 18 upward and the fin lies across and against at least the radially outer portions of the top 21 of the container neck and has a sufficient length in contact with the surface 16 to be pressed thereby against the outer corner portion 22 of the neck to form a top and corner seal.
  • the axial length of the surface 15 and the length of the fin are also such that this sealing engagement takes place when the diameter of the container neck is on the upper limit of its tolerance as shown in Figure 2 or on the lower limit of its tolerance as shown in Figure 1.
  • Figure 2 also shows the sealing fin in its unstressed condition extending parallel to the flared surface 16.
  • the rib 30 serves to strengthen the free end portion of the fin so that the diametral strain in that portion, due to the outward flexing of the fin by the top and outer corner parts of the neck, is less than if the rib were absent, and in consequence the end portion of the fin tends to lie closer to the outer corner portion of the neck even when, as in Figure 1, it is not constrained by the surface 16 to do so.
  • FIG. 3 and 4 The construction shown in Figures 3 and 4 is similar to that in Figures 1 and 2, but in Figures 3 and 4 the thickening of the free end portion of the fin is achieved by forming a rib 31 having a curved profile on the radially outer surface of the fin 18.
  • Figures 3 and 4 show the closure applied to container necks on the lower and higher limits respectively of the diametral tolerance.
  • the thickening of the free end portion of the fin strengthens it locally and causes it to be stretched to a lesser extent, but the surface 16 engages the rib 31 and presses the free end portion of the fin radially inward so as further to improve the seal.
  • the fin may have a thickness of the order of 0.63mm (.25").
  • the closures shown may additionally have grooves on the radially inner faces of the fins.
  • closures may thus be designed for use with either glass or plastic containers which are intended to contain still or carbonated liquids or materials under partial vacuum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Description

  • This invention relates to container closures.
  • GB-A-1602746 and US-A-4072244 each disclose a container closure moulded in one piece from a plastics material and comprising a top, a dependent skirt the radially inner surface of which is formed with a screw-thread, a surface which is flared in a direction away from the top being formed on the internal surface of the skirt where it joins the top, and an annular resiliently flexible fin extending downwardly and outwardly from the underside of the top at a position spaced radially inwardly of said flared surface and having a length such as to permit at least its portion adjoining its free edge to lie against said flared surface when the fin is deformed outwardly by the top of the neck of a container to which the closure is to be applied and to extend round the outer corner portion of the neck of a co-operating container.
  • According to the present invention the free end portion of the fin is thicker than the main body of the fin.
  • The free end portion may be thus thickened by reason of the provision of a peripheral rib formed locally on either the radially inner surface or the radially outer surface of said free end portion. The thickening of the free end portion serves to reduce the tensile stress in the fin when the closure is applied and in consequence to reduce the degree of extension of the free end portion of the fin so that a greater part of the length of the fin tends to hug the outer corner portion of the neck more closely and thus improves the seal. Where for this purpose a peripheral rib is formed on the radially inner surface of the fin, the rib may itself form with the neck of the container or additional line seal about the neck. Similarly where the rib is on the radially outer surface of the fin, the flared surface may engage the rib and press the free end portion of the fin towards the neck of the container, preferably at a position slightly below the outer corner portion of the neck.
  • In preferred arrangements said flared surface is conical and is inclined at 45° or less to the central axis of the closure. In one example the angle is 30°. The fin may also be conical and may extend parallel to said flared surface.
  • The radially inner surface of the fin may have a plurality of annular grooves formed therein, each pair of adjacent grooves defining between them an annular rib of triangular cross-section. The grooves may be triangular and of buttress section, and the buttress face of the groove may face towards or away from the top to form a rib or ribs suitable for use with containers for materials under vacuum or under pressure, or may be of other triangular shape such as isosceles or equilateral triangular shape to form a rib or ribs of other required cross-sectional shape.
  • Some embodiments of the invention will now be described in more detail with reference to the accompanying drawings in which:
    • Figures 1 and 2 are fragmentary sectional elevations illustrating a closure according to the invention in place on a container, and
    • Figures 3 and 4 are corresponding views of a second form of closure according to the invention.
  • Referring first to Figures 1 and 2, the closure 10 is moulded in one piece from a resilient plastics material and has a top 11 and a dependent skirt 12 formed with an internal screw-thread 13 and external knurling 14. The corner region 15 at the upper end of the skirt is thickened and has a conically flared internal surface 16 extending at an angle of 30° to the central axis 17 of the closure. Spaced radially inwardly of the surface 16 is a flexible resilient annular fin 18 of uniform thickness which extends from the underside of the top and substantially parallel to the surface 16.
  • The fin 18 has a main body of uniform thickness but has its free end portion of the fin thickened by reason of the formation of a broad flat-topped rib 30 on the radially inner surface of the end portion.
  • When the closure is applied to the neck 20 of a container the top 21 of the neck of the container deforms the fin 18 upward and the fin lies across and against at least the radially outer portions of the top 21 of the container neck and has a sufficient length in contact with the surface 16 to be pressed thereby against the outer corner portion 22 of the neck to form a top and corner seal. The axial length of the surface 15 and the length of the fin are also such that this sealing engagement takes place when the diameter of the container neck is on the upper limit of its tolerance as shown in Figure 2 or on the lower limit of its tolerance as shown in Figure 1.
  • Figure 2 also shows the sealing fin in its unstressed condition extending parallel to the flared surface 16. The rib 30 serves to strengthen the free end portion of the fin so that the diametral strain in that portion, due to the outward flexing of the fin by the top and outer corner parts of the neck, is less than if the rib were absent, and in consequence the end portion of the fin tends to lie closer to the outer corner portion of the neck even when, as in Figure 1, it is not constrained by the surface 16 to do so.
  • The construction shown in Figures 3 and 4 is similar to that in Figures 1 and 2, but in Figures 3 and 4 the thickening of the free end portion of the fin is achieved by forming a rib 31 having a curved profile on the radially outer surface of the fin 18. Figures 3 and 4 show the closure applied to container necks on the lower and higher limits respectively of the diametral tolerance. As in the construction of Figures 1 and 3 the thickening of the free end portion of the fin strengthens it locally and causes it to be stretched to a lesser extent, but the surface 16 engages the rib 31 and presses the free end portion of the fin radially inward so as further to improve the seal.
  • The fin may have a thickness of the order of 0.63mm (.25").
  • The closures shown may additionally have grooves on the radially inner faces of the fins.
  • The closures may thus be designed for use with either glass or plastic containers which are intended to contain still or carbonated liquids or materials under partial vacuum.

Claims (3)

1. A container closure moulded in one piece from a plastics material and comprising a top (11), a dependent skirt (12) the radially inner surface of which is formed with a screw-thread (13), a surface (16) which is flared in a direction away from the top being formed on the internal surface of the skirt where it joins the top, and an annular resiliently flexible fin (18) extending downwardly and outwardly from the underside of the top at a position spaced radially inwardly of said flared surface and having a length such as to permit at least its portion adjoining its free edge to lie against said flared surface (16) when the fin is deformed outwardly by the top of the neck of a container to which the closure is to be applied and to extend round the outer corner portion of the neck of a co-operating container, characterised in that the free end portion of the fin is thicker than the main body of the fin.
2. A closure as claimed in claim 1 characterised in that the free end portion is thickened by reason of the provision of a peripheral rib (31) formed locally on the radially outer surface of said free end portion.
3. A closure as claimed in claim 1, characterised in that the free end portion is thickened by reason of the provision of a peripheral rib (30) formed locally on the radially inner surface of said free end portion.
EP84305822A 1983-08-26 1984-08-24 Improvements relating to container closures Expired EP0136088B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84305822T ATE40327T1 (en) 1983-08-26 1984-08-24 CONTAINER CLOSURE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB838323037A GB8323037D0 (en) 1983-08-26 1983-08-26 Container closures
GB8323037 1983-08-26
GB8327991 1983-10-19
GB838327991A GB8327991D0 (en) 1983-10-19 1983-10-19 Container closures

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP88108884.3 Division-Into 1988-06-03

Publications (3)

Publication Number Publication Date
EP0136088A2 EP0136088A2 (en) 1985-04-03
EP0136088A3 EP0136088A3 (en) 1986-08-06
EP0136088B1 true EP0136088B1 (en) 1989-01-25

Family

ID=26286800

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84305822A Expired EP0136088B1 (en) 1983-08-26 1984-08-24 Improvements relating to container closures
EP88108884A Withdrawn EP0293901A1 (en) 1983-08-26 1984-08-24 Container closure

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88108884A Withdrawn EP0293901A1 (en) 1983-08-26 1984-08-24 Container closure

Country Status (9)

Country Link
EP (2) EP0136088B1 (en)
AU (1) AU570997B2 (en)
CA (1) CA1282033C (en)
DE (1) DE3476368D1 (en)
ES (1) ES281256U (en)
FI (1) FI80653C (en)
HK (1) HK74289A (en)
IE (1) IE55655B1 (en)
SG (1) SG22589G (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6991123B2 (en) 1997-07-14 2006-01-31 Closures And Packaging Services Limited Closure with extended seal member

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ213944A (en) * 1984-11-05 1988-02-12 Sunbeam Plastics Corp Screw-threaded closure-container assembly
US4708255A (en) * 1985-12-12 1987-11-24 Tri-Tech Systems International Inc. Closure cap with a linerless seal and a method for forming such closure and seal
US5638972A (en) 1988-06-17 1997-06-17 Druitt; Rodney Malcolm Linerless closure for carbonated beverage container
EP0481981B2 (en) † 1988-06-17 1999-11-17 Closures and Packaging Services Limited Linerless closure for carbonated beverage container
KR960013293B1 (en) * 1988-06-17 1996-10-02 로드니 말콤 드루이트 Linerless closure for carbonated beverage container
DE4128474A1 (en) * 1991-08-28 1993-03-04 Berg Jacob Gmbh Co Kg PLASTIC SCREW CAP FOR PRESSURIZED BOTTLES
EP0580369B1 (en) * 1992-07-21 1996-06-05 CarnaudMetalbox plc One-piece plastics closure
IL110654A (en) * 1993-08-19 1997-11-20 Precision Valve Australia Linerless closure for container
RU2125958C1 (en) * 1993-08-19 1999-02-10 Пресижн ВЭЛВ Аустрэлиа Пти Лимитед Vessel neck cap
FR2710325B1 (en) * 1993-09-22 1995-12-08 Jacques Perchepied Screw cap.
GB2313115B (en) * 1995-02-21 1998-08-19 Metal Closures Group Ltd Self-centering container closure
US6126027A (en) * 1995-02-21 2000-10-03 Mcg Closures Limited Self-centering container closure
ATE179666T1 (en) * 1995-02-21 1999-05-15 Metal Closures Group Ltd SELF-CENTERING CONTAINER CLOSURE
IT1278697B1 (en) * 1995-06-07 1997-11-27 Bruno Taddei SCREW PLUG IN MOLDED SYNTHETIC RESIN WITH SEAL LIP FOR AXIAL SEAL
GB9906194D0 (en) * 1999-03-18 1999-05-12 Closures & Packaging Serv Ltd Closure with seal member
FR2828173B1 (en) * 2001-08-01 2003-10-31 Rical Sa PLUG COMPRISING AN INTERNAL SEALING SKIRT COOPERATING WITH THE OUTSIDE OF A CONTAINER NECK
ES3000168T3 (en) * 2019-01-21 2025-02-27 Weener Plastics Group B V Closure for a container

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1187260A (en) * 1956-11-27 1959-09-09 Cerbo Ab Device for closing the mouth of a container
US3259266A (en) * 1964-01-06 1966-07-05 Dykem Company Closures for fluid containers
FR1525583A (en) * 1966-06-10 1968-05-17 Thomassen & Drijver Plastic bottle with stopper
US3802590A (en) * 1972-05-22 1974-04-09 Bernardin Inc Linerless container closure
FR2327930A1 (en) * 1975-10-13 1977-05-13 Alca Sa Plastics sealing cap for screw top bottle - has flexible lip to form seal on outer rim of bottle neck and inner lips to seal bottle opening
FR2339540A1 (en) * 1976-01-28 1977-08-26 Bouchons Plastiques IMPROVEMENTS TO SCREW CAPS
US4072244A (en) * 1977-02-04 1978-02-07 Owens-Illinois, Inc. Linerless closure
GB1602746A (en) * 1978-05-30 1981-11-18 Montgomery Daniel & Son Ltd Closure device for containers
NL8204885A (en) * 1981-12-24 1983-07-18 Anchor Hocking Corp LINELESS VACUUM CLOSURE OF PLASTIC.
GB2120219B (en) * 1982-05-17 1985-10-02 Metal Closures Group Plc Closures for containers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6991123B2 (en) 1997-07-14 2006-01-31 Closures And Packaging Services Limited Closure with extended seal member

Also Published As

Publication number Publication date
EP0136088A3 (en) 1986-08-06
IE842127L (en) 1985-02-26
FI80653C (en) 1990-07-10
FI80653B (en) 1990-03-30
EP0136088A2 (en) 1985-04-03
CA1282033C (en) 1991-03-26
HK74289A (en) 1989-09-22
AU570997B2 (en) 1988-03-31
IE55655B1 (en) 1990-12-05
ES281256U (en) 1985-12-16
FI843298A7 (en) 1985-02-27
SG22589G (en) 1989-07-14
DE3476368D1 (en) 1989-03-02
EP0293901A1 (en) 1988-12-07
FI843298A0 (en) 1984-08-21
AU3227584A (en) 1985-02-28

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