EP0481981A4 - Linerless closure for carbonated beverage container. - Google Patents
Linerless closure for carbonated beverage container.Info
- Publication number
- EP0481981A4 EP0481981A4 EP19890907042 EP89907042A EP0481981A4 EP 0481981 A4 EP0481981 A4 EP 0481981A4 EP 19890907042 EP19890907042 EP 19890907042 EP 89907042 A EP89907042 A EP 89907042A EP 0481981 A4 EP0481981 A4 EP 0481981A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- closure
- rib
- container
- neck
- contiguous
- 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.)
- Granted
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
- 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
-
- 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
- B65D51/16—Closures not otherwise provided for with means for venting air or gas
- B65D51/1672—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element
- B65D51/1688—Venting occurring during initial closing or opening of the container, by means of a passage for the escape of gas between the closure and the lip of the container mouth, e.g. interrupted threads
-
- 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
- B65D2401/00—Tamper-indicating means
- B65D2401/15—Tearable part of the closure
Definitions
- This invention relates to caps for sealing the opening of screw top containers.
- the invention provides a screw top cap which seals bottles of carbonated .
- liquid such as softdrinks but is well adapted to seal other containers such as glass or PET containers with contents at above or below atmospheric pressure or having gaseous components or requiring a hermatic seal.
- Screw top caps have been used for some time to seal various containers. Although many screw tops include a separate sealing wad within the cap, there is substantial advantage to be had in producing a one-piece cap which still effectively seals the container.
- Australian application 15456/76 (30 June 1976) discloses an alternative one-piece cap in which a annular lip extends from the inside top of the cap and engages the inner bore of a container opening so as to curl the free end of the lip in against the bore or inside surface of the opening.
- this cap effective sealing requires that the inside bore of the opening be of accurate and consistent dimensions.
- gas pressure will tend to distort the lip and cause a seal f ilure .
- Australian patent application 14180/83 (5 May 1983) describes a cap with two internal sealing structures.
- One of the structures is an annular shaped outer portion shaped to accept the outer peripheral edge of the free end of the container relying upon the pressure generated during the closing of the cap to seal against this outer edge.
- an inner cylindrical lip to engage the inner bore of the container opening.
- a closure for a container having an externally screw threaded neck said closure being moulded in one piece from a resilient plastics material and comprising a top and a depending skirt which has on its internal surface a complementary screw thread, characterised in that an annular sealing rib projects downwardly from the top, the rib includes a first substantially cylindrical portion contiguous with the top and lying adjacent to or abutting with the skirt and a second, frusto-conical, portion contiguous with the end of the first portion distal to the top and extending radially inwardly to terminate in a circular free edge, the internal diameter of the first portion being equal to or only slightly larger than the external diameter of the neck of the container to which the closure is to be attached such that, during threaded engagement of the cap with the neck, the second, frusto-conical, portion will be engaged by a free end of the neck and folded back against the first, substantially cylindrical portion of the rib and to form
- the plastics material is high density polyethylene, low density polyethylene, or polypropylene. Where the container is to be used for gaseous liquids, the plastics material must have a very low porosity to the gas.
- the rib is shaped and sized so that, during the threaded engagement of the closure with the container, the free edge of the rib contacts an inner surface of the top, or the surface of structure contiguous with the top, before the closure is fully engaged and such that the rib in the region proximal the free edge is pinched between the free end of the neck of the container and the top of the closure, or the structure contiguous with the top of the closure, when the closure is fully engaged with the container.
- the first substantially cylindrical and second frusto-conical portions of the lip join at an included angle of at least 90 .
- the rib is of a thickness tapering from a maximum thickness proximal the top to a minimum thickness at its annular free edge.
- first substantially cylindrical and second frusto-conical portions of the lip smoothly join with an internal radius of from 0.1mm to 0.5mm, most preferably 0.2mm. It is further preferred that the cross-sectional thickness of the rib proximate the join between the first and second portions is from 0.4m to 0.8m, most preferably approximately 0.6mm.
- the closure is adapted to seal a container with an Alcoa step finish
- the first substantially cylindrical portion of the sealing rib joins the top spaced radially inwardly from the skirt so as to define a space of annular cross-section between the rib and skirt.
- the container neck has a standard finish the rib is closely spaced from, or contiguous with, the skirt.
- Fig. 1 an embodiment of the present invention in sectioned elevation
- FIG. 2 the embodiment of Fig. 1 screwed onto a suitable container shown in sectional elevation; and Fig. 3 an alternative embodiment in sectional elevation.
- Fig. 1 shows a cap 1 which is in many aspects a conventional screw top cap for a bottle to be used in containing a carbonated beverage.
- the cap 1 includes a continuous cylindrical sidewall 2 with a thread 3 formed on its interior surface.
- the top end of the cap 1 is closed by a top 4 which joins the skirt 2 in a continuous circular perimeter.
- the top 4 and skirt 2 being formed integrally from high density polyethylene by injection moulding.
- the cap differs from known caps in that it includes an annular rib 6 which extends from the interior surface of the top 4 concentrically of the cap 1, being positioned close to the skirt 2.
- the annular sealing rib 6 includes a first or root portion 7 which extends from the top 4 approximately parallel to the skirt 2 with a second portion 8 extending from the end of the first portion 7 tapering inwardly and away from the end wall 8.
- the cap 1 can be seen in Fig. 2 screwed onto the screw top end 9 of a container not fully shown in the drawing.
- the end 9 of the container is finished with an "Alcoa step" 10 at the outer periphery of its open end extremity.
- the Alcoa step 10 allows a space between the end 9 of the container and the inner surface of the skirt 2 of the cap 1.
- the size of this annular space is sufficient to allow the second portion 8 of the outer rib 6 to contact the end 9 of the container as the cap 1 is being screwed onto the container, and for the second portion 8 to fold up on itself and against the root portion 7 and structure integral with the top 4.
- there is formed a continuous gas tight seal between the cap 1 and the container extending from the Alcoa step 10 to the end surface of the container.
- the second portion 8 of the sealing rib 6 is deformed by being bent towards the top 4. The deformation continues and contact is made between the second portion 8 of the sealing rib 6 and an inner rib 5 which effectively extends the structure of the top 4.
- the inner rib 5 in fact is not essential to the invention and can be dispensed with if the other components are suitably modified so that the end portion 8 contacts the top 4 during this deformation.
- annular gap 12 is formed between the outer rib 6 and the skirt 7, proximate the top 4. This is one means of accommodating the Alcoa step 10 and allowing the necessary movement of the outer rib 6 during application of the cap 1 to a container end 9.
- the dimensions of the outer rib 6, in conjunction with the design shape of the rib 6 and its material of construction, will clearly influence the effectiveness of the cap 1. Not only the sealing effectiveness but also the mouldability, removal torque, reusability and consistency are important.
- the inner radius joining the first and second portions 7 and 8 of the outer rib 6 is 0.2mm, the outer radius 0.5mm and the cross-sectional thickness approximately 0.6mm (slightly tapered for mould removal) .
- Fig. 3 has a very much smaller inner rib 5 but is otherwise substantially the same as the embodiment of Fig. 1 and 2.
- the cap is modified (not illustrated) for containers not finished with an Alcoa step.
- the inner diameter at the skirt and the thread dimensions must provide a secure engagement with the container thread.
- the inner dimension of the first portion 7 of the sealing rib 6 is preselected to be equal to, or slightly greater than, the external diameter of the container neck at the opening.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPI884688 | 1988-06-17 | ||
AU8846/88 | 1988-06-17 | ||
AU884688 | 1988-06-17 | ||
PCT/AU1989/000256 WO1989012584A1 (en) | 1988-06-17 | 1989-06-15 | Linerless closure for carbonated beverage container |
AU37737/89A AU627746B2 (en) | 1988-06-17 | 1989-06-15 | Linerless closure for carbonated beverage container |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0481981A4 true EP0481981A4 (en) | 1991-03-06 |
EP0481981A1 EP0481981A1 (en) | 1992-04-29 |
EP0481981B1 EP0481981B1 (en) | 1994-08-31 |
EP0481981B2 EP0481981B2 (en) | 1999-11-17 |
Family
ID=25624087
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89907042A Expired - Lifetime EP0481981B2 (en) | 1988-06-17 | 1989-06-15 | Linerless closure for carbonated beverage container |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0481981B2 (en) |
WO (1) | WO1989012584A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5638972A (en) * | 1988-06-17 | 1997-06-17 | Druitt; Rodney Malcolm | Linerless closure for carbonated beverage container |
EP0460813A3 (en) * | 1990-05-25 | 1992-03-11 | Tredegar Molded Products Company | Threaded closure with integral sealing means |
ES2048060B1 (en) * | 1991-10-01 | 1995-07-01 | Druitt Titular Del 50 Rodney M | LID WITHOUT INTERIOR COATING FOR CARBONIC BEVERAGE CONTAINER. |
EG21314A (en) * | 1992-07-16 | 2000-10-31 | Driutt Rodney Malcolm | Tamper evident closure |
FR2710325B1 (en) | 1993-09-22 | 1995-12-08 | Jacques Perchepied | Screw cap. |
SE501925C2 (en) * | 1993-09-24 | 1995-06-19 | Kabi Pharmacia Ab | Containers for medical fluids and procedures for their sealing |
NL9402151A (en) * | 1994-12-19 | 1996-08-01 | Johannes Antonius Maria Van Cr | Combination of a bottle and a cap as well as a bottle and cap intended for this combination. |
BRPI0514822B1 (en) | 2004-09-01 | 2017-10-17 | Creanova Universal Closures Ltd. | SEAL FOR CLOSURE, CLOSURE AND PROCESS |
CN101044065B (en) * | 2004-09-01 | 2013-02-13 | 克雷诺瓦通用密封有限公司 | Closure |
EP1879807A2 (en) | 2005-03-14 | 2008-01-23 | Creanova Universal Closures Ltd. | Closure |
EP2663506B1 (en) | 2011-01-14 | 2015-09-09 | Creanova Universal Closures Limited | Closure |
US10532858B2 (en) | 2017-09-06 | 2020-01-14 | Creanova Universal Closures Ltd. | Closure for container neck finishes |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3203571A (en) * | 1960-12-06 | 1965-08-31 | Robert L Plunkett | Self sealing cap construction |
US4450973A (en) * | 1982-09-28 | 1984-05-29 | Thurston Toeppen | Closure for pressurized containers |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1454905B2 (en) † | 1961-10-03 | 1970-06-04 | Aktiebolaget Wicanders Korkfabriker, Stockholm | Method for producing a closure cap made of thermoplastic material for bottles and the like |
US3405830A (en) † | 1965-10-23 | 1968-10-15 | Hayashida Kouichi | Bottle-stopper |
US3478911A (en) † | 1967-12-22 | 1969-11-18 | Reflex Corp Canada Ltd | Safety cap and container |
FR2085289B2 (en) † | 1970-02-18 | 1974-10-11 | Wassilieff Victor | |
GB1499895A (en) * | 1974-06-07 | 1978-02-01 | Mack Wayne Plastics Co | Container and cap combination |
AU501052B2 (en) † | 1974-10-02 | 1979-06-07 | Te. Chill Search Limited | Two-to-four wire converter |
FR2391926A2 (en) * | 1976-02-03 | 1978-12-22 | Grussen Jean | IMPROVED SEALING SCREW CAPSULE AND MANUFACTURING MOLD |
US4069937A (en) * | 1977-01-28 | 1978-01-24 | Owens-Illinois, Inc. | Linerless closure |
US4349116A (en) † | 1978-12-07 | 1982-09-14 | Ethyl Products Company | Thermoplastic screw-threaded closure cap |
US4398645A (en) † | 1981-06-29 | 1983-08-16 | Thurston Toeppen | Closure for pressurized containers |
EP0109631A3 (en) * | 1982-11-17 | 1985-07-31 | Walter Wiedmer | Thread closure of elastic material for a container |
IE55655B1 (en) † | 1983-08-26 | 1990-12-05 | Metal Closures Ltd | Closures |
GB8328954D0 (en) † | 1983-10-29 | 1983-11-30 | Metal Box Plc | One-piece plastics closure |
-
1989
- 1989-06-15 EP EP89907042A patent/EP0481981B2/en not_active Expired - Lifetime
- 1989-06-15 WO PCT/AU1989/000256 patent/WO1989012584A1/en active IP Right Grant
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3203571A (en) * | 1960-12-06 | 1965-08-31 | Robert L Plunkett | Self sealing cap construction |
US4450973A (en) * | 1982-09-28 | 1984-05-29 | Thurston Toeppen | Closure for pressurized containers |
Non-Patent Citations (1)
Title |
---|
See also references of WO8912584A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0481981B2 (en) | 1999-11-17 |
EP0481981A1 (en) | 1992-04-29 |
WO1989012584A1 (en) | 1989-12-28 |
EP0481981B1 (en) | 1994-08-31 |
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