US3595418A - Closures for containers - Google Patents
Closures for containers Download PDFInfo
- Publication number
- US3595418A US3595418A US819381A US3595418DA US3595418A US 3595418 A US3595418 A US 3595418A US 819381 A US819381 A US 819381A US 3595418D A US3595418D A US 3595418DA US 3595418 A US3595418 A US 3595418A
- Authority
- US
- United States
- Prior art keywords
- annulus
- top portion
- closure
- container
- sloping
- 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 - Lifetime
Links
- 239000012858 resilient material Substances 0.000 claims abstract description 6
- -1 polyethylene Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
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
- a closure for the neck of a container which closure is moulded as a unitary structure from a resilient material and comprises a top portion, a screw-threaded annular skirt portion and a downwardly depending annulus provided on the underside of the top portion, wherein a sloping portion, having an inside surface which is at least partially convex in shape, joins the top portion to the skirt portion, and the downwardly depending annulus has a concave external face.
- a closure for the neck of a container is moulded as a unitary structure from a resilient natural or synthetic material and comprises atop portion, a screw-threaded annular skirt portion, a downwardly depending annulus having a concave external face provided on the underside of the top portion, and a sloping portion, having an inside surface which is at least partially convex in shape, joining the top portion to the skirt portion.
- the closure may be moulded from any suitable flexible or resilient material, for example rubber (natural or synthetic), polyethylene or polyvinyl chloride, but preferablyit is made from polypropylene.
- the screw thread provided on the skirt portion for engaging the neck of a container to which the clo sure is applied and gradually tightening the closure thereon is preferably a single-start screw thread which engages a corresponding thread formed on the neck of the container.
- the screw thread may, however, be a multistart thread or a series of lugs adapted to engage corresponding sloping projections provided on the exterior of the container neck.
- the downwardly depending annulus provided on the underside of the top portion of the closure which may comprise a straight-sidedinternal face, suitably sloping at an angle of about to the longitudinal axis of the closure and a bottom face parallel with the top portion, will be so designed that, when the closure is applied to the neck of a container, pres sure of the outside edge of the container mouth against the convex surface of the sloping portion will cause the concave outer surface of the annulus to move towards the sloping portion, and hence will press the concave outer face of the annulus into sealing contact with the inside edge of the container mouth.
- the sloping portion and the annulus act on the mouth of the container'after the manner of pincers. The harder the mouth of the container is pressed against the inside surface of the sloping portion, the tighter is the concave outer face of the annulus pressed against the inside of the container mouth.
- FIG. 1 is a sectional elevation of a closure according to the inventiomand 7
- FIG. 2 is a sectional elevation of the closure of FIG. 1 applied to a container neck.
- the closure moulded from a resilient material such as polypropylene, comprises a top portion 1, an annular skirt portion 2 provided with an internal screw thread 3,-and a frustoconical portion 4 joining the top portion to the skirt portion.
- the underside of the top portion is provided with a downwardly depending substantial annulus 5, having a straight-sided internal face 6, which slopes at an angle of about l0 to the longitudinal axis of the closure, a bottom face 7 which is parallel with the top portion 1, and a concave external face 8.
- the inside surface of the joining portion 4 is convexly curved, as indicated at 9. 1n the closure shown in the'drawing the inside surface of the joining portion is curved along about three-fourths of its length.
- the radius of curvature of the con- Vex surface 9 is substantially equal to the radius of curvature of the face 8 of annulus 5.
- a closure has the following dimensions (see FIG. 1):
- the radius of curvature of the two curved faces 8 and 9 is 0.25 inch, and the radius of curvature of the curved part 10, joining faces 8 and 9, is 0.023 inch.
- a closure for the neck of a container which closure is a unitary moulded structure of a resilient material, comprising a top portion, an internally screw-threaded annular skirt portion, which skirt portion is connected to said top portion by a sloping portion, and a downwardly depending annulus portion disposed on the underside of the top portion, said sloping portion having a convexly curved inside surface which joins the underside of the said top portion at a locus near the locus where an outer face of the said annulus portion joins the underside of said top portion, the outer face of said annulus portion having a concavely curved surface, the dimensions between the lower part of the convexly curved inside surface of the sloping portion and the lower part of the concavely curved surface of the outer face of the annulus portion being such as to receive the top of the mouth of a container but the dimension between the upper part of the convexly curved inside surface of the sloping portion and the upper part of the concave
- a closure according to claim 1 wherein the outside surface of the sloping portion is frustoconical in shape.
- a closure according to claim 1 wherein the downwardly depending annulus has a straight-sided internal face and a bottom face parallel with the top portion.
Abstract
A closure for the neck of a container, which closure is moulded as a unitary structure from a resilient material and comprises a top portion, a screw-threaded annular skirt portion and a downwardly depending annulus provided on the underside of the top portion, wherein a sloping portion, having an inside surface which is at least partially convex in shape, joins the top portion to the skirt portion, and the downwardly depending annulus has a concave external face.
Description
nited States Patent inventors Edmund Philip Adcoek llarpenden;
Jeffrey Herbert Sutcliffe, Norwich, Norfolk; Colin Charles Woodward, Maidenhead, all of, England 819,381
Apr. 25. 1969 July 27, 1971 U.G. Closurers and Plastics Limited Norfolk, England Apr. 26, 1968 Great Britain Appl. No. Filed Patented Assignee Priority CLOSURES FOR CONTAINERS 5 Claims, 2 Drawing Figs.
US. Cl. 215/40, 215/43 R Int. Cl. 865d 41/04 Field Search 2l5/40,41,
[5 6] Reierences Cited UNlTED STATES PATENTS 2,914,206 11/1959 Lowen 215/41 2,965,256 12/1960 Yochem. 215/43 3,482,725 12/1969 Exton 215/43 FOREIGN PATENTS 1,049,059 8/1953 France 215/43 1,004,277 9/1965 Great Britain 215/43 Primary Examiner- Donald F. Norton Attorney-Cushman, Darby & Cushman ABSTRACT: A closure for the neck of a container, which closure is moulded as a unitary structure from a resilient material and comprises a top portion, a screw-threaded annular skirt portion and a downwardly depending annulus provided on the underside of the top portion, wherein a sloping portion, having an inside surface which is at least partially convex in shape, joins the top portion to the skirt portion, and the downwardly depending annulus has a concave external face.
PATENTEnJuLemn 3,595,418
SHEET 1 OF 2 4 1e: Woodward MAM/1.024% Cash nan Afforny CLOSURES FOR CONTAINERS This invention relates to closuresfor containers, for example bottle and jars, and is especially concerned with closures of the type which are applied to containers without the need for a separate liner or wad within the closure. Such closures are commonly referred to as wadless" closures.
According to the present invention a closure for the neck of a container is moulded as a unitary structure from a resilient natural or synthetic material and comprises atop portion, a screw-threaded annular skirt portion, a downwardly depending annulus having a concave external face provided on the underside of the top portion, and a sloping portion, having an inside surface which is at least partially convex in shape, joining the top portion to the skirt portion. The closure may be moulded from any suitable flexible or resilient material, for example rubber (natural or synthetic), polyethylene or polyvinyl chloride, but preferablyit is made from polypropylene. The screw thread provided on the skirt portion for engaging the neck of a container to which the clo sure is applied and gradually tightening the closure thereon, is preferably a single-start screw thread which engages a corresponding thread formed on the neck of the container. The screw thread may, however, be a multistart thread or a series of lugs adapted to engage corresponding sloping projections provided on the exterior of the container neck.
The downwardly depending annulus provided on the underside of the top portion of the closure, which may comprise a straight-sidedinternal face, suitably sloping at an angle of about to the longitudinal axis of the closure and a bottom face parallel with the top portion, will be so designed that, when the closure is applied to the neck of a container, pres sure of the outside edge of the container mouth against the convex surface of the sloping portion will cause the concave outer surface of the annulus to move towards the sloping portion, and hence will press the concave outer face of the annulus into sealing contact with the inside edge of the container mouth. It will be appreciated, therefore, that the sloping portion and the annulus act on the mouth of the container'after the manner of pincers. The harder the mouth of the container is pressed against the inside surface of the sloping portion, the tighter is the concave outer face of the annulus pressed against the inside of the container mouth.
The sloping portion of the closure joining the top portion to radius of curvature of the concavev external face of the downwardly depending annulus.
The invention is illustrated by means of the accompanying drawings, in which v i FIG. 1 is a sectional elevation of a closure according to the inventiomand 7 FIG. 2 is a sectional elevation of the closure of FIG. 1 applied to a container neck.
The closure, moulded from a resilient material such as polypropylene, comprises a top portion 1, an annular skirt portion 2 provided with an internal screw thread 3,-and a frustoconical portion 4 joining the top portion to the skirt portion. The underside of the top portion is provided with a downwardly depending substantial annulus 5, having a straight-sided internal face 6, which slopes at an angle of about l0 to the longitudinal axis of the closure, a bottom face 7 which is parallel with the top portion 1, and a concave external face 8.
The inside surface of the joining portion 4 is convexly curved, as indicated at 9. 1n the closure shown in the'drawing the inside surface of the joining portion is curved along about three-fourths of its length. The radius of curvature of the con- Vex surface 9 is substantially equal to the radius of curvature of the face 8 of annulus 5.
When the closure is applied to the neck 20 of a container having a corresponding screw thread and is screwed down tight (see FIG. 2), the outside radiused edge of the container mouth is pressed tightly against the convex portion 9. This pressure tends to move the portion 4 of the closure upwardly, and causes the annulus 5 to flex outwardly. This brings the concave face of annulus 5 into tight sealing contact with the inside of the container mouth, and a double seal is obtained, i.e. on both the inside and outside of the container mouth. The tighter the closure is applied to the container the tighter is the annulus 5 pressed into sealing contact with the inside of the container mouth.
In a specific example, a closure has the following dimensions (see FIG. 1):
Dimension a 0.95 inch;
Dimension b 0.18 inch;
Dimension c 0.21 inch;
Dimension 0' 0.04 inch;
Dimension f 0.05 inch;
Dimension Dimension g 0.15 inch;
Dimension h 0.02 inch;
Dimension i0.03 inch.
The radius of curvature of the two curved faces 8 and 9 is 0.25 inch, and the radius of curvature of the curved part 10, joining faces 8 and 9, is 0.023 inch.
What we claim is:
l. A closure for the neck of a container, which closure is a unitary moulded structure of a resilient material, comprising a top portion, an internally screw-threaded annular skirt portion, which skirt portion is connected to said top portion by a sloping portion, and a downwardly depending annulus portion disposed on the underside of the top portion, said sloping portion having a convexly curved inside surface which joins the underside of the said top portion at a locus near the locus where an outer face of the said annulus portion joins the underside of said top portion, the outer face of said annulus portion having a concavely curved surface, the dimensions between the lower part of the convexly curved inside surface of the sloping portion and the lower part of the concavely curved surface of the outer face of the annulus portion being such as to receive the top of the mouth of a container but the dimension between the upper part of the convexly curved inside surface of the sloping portion and the upper part of the concavely curved surface of the outer face of the annulus portion being such that the top of the mouth of a container is tightly engaged with both the said inside surface of the sloping portion and surface of the outer face of the annulus portion when the said screw-threaded skirt portion is engaged by the screw threads of the container mouth, whereby the convexly curved inside surface of the sloping portion is engaged by the outer top portion of the container mouth and moved upwardly and causes the outer face of the annulus portion to pivot outwardly and against the inside top portion of the container mouth and be tightly engaged thereby, and hence effecting a tight seal between the outer top portion of the container mouth and the convexly curved inside surface of the sloping portion and between the inside top portion of the container mouth and outer face of the annulus portion.
2. A closure according to claim 1 wherein the outside surface of the sloping portion is frustoconical in shape.
3. A closure according to claim 1 wherein the downwardly depending annulus has a straight-sided internal face and a bottom face parallel with the top portion.
4. A closure according to claim 3 wherein the internal face of the downwardly depending annulus slopes at an angle of about 10 to the longitudinal axis of the closure.
5. A closureaccording to claim 1 wherein the radius of curvature of the convex inside surface of the sloping portion is equal to the radius of curvature of the concave outer face of the downwardly depending annulus.
Claims (5)
1. A closure for the neck of a container, which closure is a unitary moulded structure of a resilient material, comprising a top portion, an internally screw-threaded annular skirt portion, which skirt portion is connected to said top portion by a sloping portion, and a downwardly depending annulus portion disposed on the underside of the top portion, said sloping portion having a convexly curved inside surface which joins the underside of the said top portion at a locus near the locus where an outer face of the said annulus portion joins the underside of said top portion, the outer face of said annulus portion having a concavely curved surface, the dimensions between the lower part of the convexly curved inside surface of the sloping portion and the lower part of the concavely curved surface of the outer face of the annulus portion being such as to receive the top of the mouth of a container but the dimension between the upper part of the convexly curved inside surface of the sloping portion and the upper part of the concavely curved surface of the outer face of the annulus portion being such that the top of the mouth of a container is tightly engaged with both the said inside surface of the sloping portion and surface of the outer face of the annulus portion when the said screw-threaded skirt portion is engaged by the screw threads of the container mouth, whereby tHe convexly curved inside surface of the sloping portion is engaged by the outer top portion of the container mouth and moved upwardly and causes the outer face of the annulus portion to pivot outwardly and against the inside top portion of the container mouth and be tightly engaged thereby, and hence effecting a tight seal between the outer top portion of the container mouth and the convexly curved inside surface of the sloping portion and between the inside top portion of the container mouth and outer face of the annulus portion.
2. A closure according to claim 1 wherein the outside surface of the sloping portion is frustoconical in shape.
3. A closure according to claim 1 wherein the downwardly depending annulus has a straight-sided internal face and a bottom face parallel with the top portion.
4. A closure according to claim 3 wherein the internal face of the downwardly depending annulus slopes at an angle of about 10* to the longitudinal axis of the closure.
5. A closure according to claim 1 wherein the radius of curvature of the convex inside surface of the sloping portion is equal to the radius of curvature of the concave outer face of the downwardly depending annulus.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1995668 | 1968-04-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3595418A true US3595418A (en) | 1971-07-27 |
Family
ID=10137930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US819381A Expired - Lifetime US3595418A (en) | 1968-04-26 | 1969-04-25 | Closures for containers |
Country Status (7)
Country | Link |
---|---|
US (1) | US3595418A (en) |
BE (1) | BE732142A (en) |
DE (1) | DE1921026A1 (en) |
ES (1) | ES147919Y (en) |
FR (1) | FR2007050A1 (en) |
LU (1) | LU58487A1 (en) |
NL (1) | NL6810153A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3727784A (en) * | 1971-10-20 | 1973-04-17 | Thetford Corp | Closure for bottle |
US3881627A (en) * | 1973-05-09 | 1975-05-06 | Ethyl Dev Corp | Vial container and closure |
US3901404A (en) * | 1972-05-18 | 1975-08-26 | Dairy Cap Corp | Bottle cap |
US4206852A (en) * | 1979-01-26 | 1980-06-10 | Aluminum Company Of America | Linerless closure for pressurized container |
US4303168A (en) * | 1977-06-21 | 1981-12-01 | Kerr Glass Manufacturing Corporation | Linerless closure with crushable seal |
US4322011A (en) * | 1980-01-21 | 1982-03-30 | Owens-Illinois, Inc. | Side seal closure |
WO1988009719A1 (en) * | 1987-06-10 | 1988-12-15 | Tri-Tech Systems International Inc. | Closure cap with seal and method of and apparatus for forming such closure and seal |
US5480028A (en) * | 1993-12-08 | 1996-01-02 | Owens-Illinois Plastic Products Inc. | Stackable plastic container package |
US5549213A (en) * | 1991-11-12 | 1996-08-27 | Edward S. Robbins, III | Reusable re-collapsible container and resealable cap |
US6981603B1 (en) * | 2001-08-15 | 2006-01-03 | Silgan Plastics Corporation | Package including a container with a wide-mouth spout and enclosure sealing the spout |
EP1746038A1 (en) * | 2005-07-21 | 2007-01-24 | Obrist Closures Switzerland GmbH | Flexible shell |
US20080210616A1 (en) * | 2004-05-10 | 2008-09-04 | Ellis Samuel A | Flash chromatography cartridge |
US20110095058A1 (en) * | 2009-07-31 | 2011-04-28 | Colgate-Palmolive Company | Closure for a container |
JP2015071430A (en) * | 2013-10-02 | 2015-04-16 | 凸版印刷株式会社 | Lock-up container |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2507160A1 (en) * | 1981-06-05 | 1982-12-10 | Barre Rene | CLOSING DEVICE FOR BOTTLES |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1049059A (en) * | 1952-01-11 | 1953-12-28 | Improved sealing device for bottles, flasks, etc. | |
US2914206A (en) * | 1957-03-06 | 1959-11-24 | Lowen Stanley | Container cap |
US2965256A (en) * | 1959-04-10 | 1960-12-20 | Donald E Yochem | Closure for a container |
GB1004277A (en) * | 1963-06-07 | 1965-09-15 | George Morell | Improvements in bottle caps or stoppers |
US3482725A (en) * | 1966-12-06 | 1969-12-09 | Klm Co | Closures and methods of making the same |
-
1968
- 1968-07-18 NL NL6810153A patent/NL6810153A/xx unknown
-
1969
- 1969-04-24 DE DE19691921026 patent/DE1921026A1/en active Pending
- 1969-04-25 US US819381A patent/US3595418A/en not_active Expired - Lifetime
- 1969-04-25 BE BE732142D patent/BE732142A/xx unknown
- 1969-04-25 ES ES1969147919U patent/ES147919Y/en not_active Expired
- 1969-04-25 LU LU58487D patent/LU58487A1/xx unknown
- 1969-04-25 FR FR6913263A patent/FR2007050A1/fr not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1049059A (en) * | 1952-01-11 | 1953-12-28 | Improved sealing device for bottles, flasks, etc. | |
US2914206A (en) * | 1957-03-06 | 1959-11-24 | Lowen Stanley | Container cap |
US2965256A (en) * | 1959-04-10 | 1960-12-20 | Donald E Yochem | Closure for a container |
GB1004277A (en) * | 1963-06-07 | 1965-09-15 | George Morell | Improvements in bottle caps or stoppers |
US3482725A (en) * | 1966-12-06 | 1969-12-09 | Klm Co | Closures and methods of making the same |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3727784A (en) * | 1971-10-20 | 1973-04-17 | Thetford Corp | Closure for bottle |
US3901404A (en) * | 1972-05-18 | 1975-08-26 | Dairy Cap Corp | Bottle cap |
US3881627A (en) * | 1973-05-09 | 1975-05-06 | Ethyl Dev Corp | Vial container and closure |
US4303168A (en) * | 1977-06-21 | 1981-12-01 | Kerr Glass Manufacturing Corporation | Linerless closure with crushable seal |
US4206852A (en) * | 1979-01-26 | 1980-06-10 | Aluminum Company Of America | Linerless closure for pressurized container |
US4322011A (en) * | 1980-01-21 | 1982-03-30 | Owens-Illinois, Inc. | Side seal closure |
WO1988009719A1 (en) * | 1987-06-10 | 1988-12-15 | Tri-Tech Systems International Inc. | Closure cap with seal and method of and apparatus for forming such closure and seal |
US5549213A (en) * | 1991-11-12 | 1996-08-27 | Edward S. Robbins, III | Reusable re-collapsible container and resealable cap |
US5480028A (en) * | 1993-12-08 | 1996-01-02 | Owens-Illinois Plastic Products Inc. | Stackable plastic container package |
US6981603B1 (en) * | 2001-08-15 | 2006-01-03 | Silgan Plastics Corporation | Package including a container with a wide-mouth spout and enclosure sealing the spout |
US20080210616A1 (en) * | 2004-05-10 | 2008-09-04 | Ellis Samuel A | Flash chromatography cartridge |
US20080217250A1 (en) * | 2004-05-10 | 2008-09-11 | Ellis Samuel A | Flash chromatography cartridge |
US8066875B2 (en) | 2004-05-10 | 2011-11-29 | Scientific Plastic Products, Inc. | Flash chromatography cartridge |
US8070957B2 (en) | 2004-05-10 | 2011-12-06 | Scientific Plastic Products, Inc. | Flash chromatography cartridge |
US8506804B1 (en) | 2004-05-10 | 2013-08-13 | Scientific Plastic Products, Inc. | Flash chromatography cartridge |
EP1746038A1 (en) * | 2005-07-21 | 2007-01-24 | Obrist Closures Switzerland GmbH | Flexible shell |
US20110095058A1 (en) * | 2009-07-31 | 2011-04-28 | Colgate-Palmolive Company | Closure for a container |
US8534510B2 (en) * | 2009-07-31 | 2013-09-17 | Colgate-Palmolive Company | Closure for a container |
JP2015071430A (en) * | 2013-10-02 | 2015-04-16 | 凸版印刷株式会社 | Lock-up container |
Also Published As
Publication number | Publication date |
---|---|
ES147919U (en) | 1969-08-01 |
ES147919Y (en) | 1970-04-01 |
BE732142A (en) | 1969-10-27 |
NL6810153A (en) | 1969-10-28 |
DE1921026A1 (en) | 1969-11-06 |
LU58487A1 (en) | 1969-07-22 |
FR2007050A1 (en) | 1970-01-02 |
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