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
  • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
  • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
• • 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
  • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
  • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
  • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
  • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges

Definitions

• This invention relates to containers for tamper evident closures and in particular to the neck portion of a container for a tamper evident closure.
• the invention also relates to the combination of a neck portion of a container and a cap for use therewith. Tamper evident closures enable a consumer to determine whether the closure has been previously removed and replaced with the possibility that the goods have become contaminated. Closures of the general kind in question here, are wel l known and have been in use for a number of years on mi lk bottles, fruit j uice containers, containers for motor oils and many other types of containers .
• the closures consist of a cap which seals the container and a tear-off ring which is initial ly connected to the cap by thin j oining members spaced around the circumference of the ring.
• the j oining members fracture when the cap is rotated due either to the rotational movement of the cap or the axial movement of the cap away from the ring.
• the ring is retained against rotation by a ratchet arrangement between the neck of the container and the ring or against axia l movement on the neck of the container by a ridge around the neck which engages inwardl y directed l edge members on the ring.
• the ring may be removed from the container neck after the c ap ha s been r emov ed but in the other ca s e the ring usua l ly remains on the neck of the container.
• a problem occurs with the known tamper evident closures in the that i t i s of ten not c l ear l y ev ident , wi thout c l ose inspection, that the c losure has been removed and replaced on the container because when it is rep laced the two parts come again into close proximity with each other.
• the invention provides a container having a neck
• 5 c losure comprises a cap and an interconnected ring
• said neck has first and second thread
• cap leaves a readily discernible gap between said cap and
• Figure 1 is a perspective view of a cap for use with
• Figure 2 is a side view of the neck portion of a
• Figure 3 is a cross-sectional view of the cap of Figure
• Figure 4 is an enlarged perspective view of the neck
• Figure 5 is a view similar to Figure 4 but showing the
• Figure 6 is a view similar to Figures 4 and 5 but
• the first threaded portion 11 is a conventional right-hand, thread and the second threaded portion or ramp 13 is an opposite thread, that is, a left-hand thread.
• the second threaded portion 13 is a dual flight thread. In other words, the second threaded portion has two starts or two separate ramps.
• the closure 18 comprises a cap 19 and ring 20 which are initially joined together by a plurality of joining members 21 which are wedge shaped and at their thin end are connected to the outer perimeter of the cap 19.
• the ring 20 is castellated so as to define openings 22 between the cap and ring when they are joined together and the openings provide inwardly directed ledge members 23 which, after initial installation of the closure, engage the abutment surface 17 to prevent removal of the ring 20 from the neck portion 10.
• the ledge members 23 are able to distort slightly and cam up the inclined surface 15 so as to pass over the tapered ledge 14 during initial installation of the closure 18 on the neck portion 1 0. Al though it is not cl ear ly evident in Figure 2 , the two separate f l ights of the second threaded portion 1 3 commence at the abutment surface 1 7 of the tapered l edge 1 4.
• the ledge members 23 engage the inclined surfaces of the f lights of the second threaded portion 1 3 which, because they run in a counter direction to the f irst threaded portion 1 1 , cause the ring 20 to move axial ly on the neck portion 1 0 in the opposite direction to the cap 1 9.
• the dual flights of the threaded portion 1 3 prov ide a coarse pitch thread relative to the first threaded portion 1 1 which causes the axia l movement of the ring 20 to be at a greater rate than the axia l movement of the cap 1 9.
• this opposed axia l movement causes a rupturing of the j joining members 21 progressively as the ring moves away from the cap such that when the last joining member 21 has ruptured, the ring 20 has moved a discernible distance away from the tapered ledge 14.
• rotation of the cap 19 to remove it from the neck portion 10 causes axial movement of the ring 20 in a direction away from the mouth 12 of the neck portion 10.
• the neck portion described provides an improved arrangement for use with tamper evident closures. Rather than the ring of the closure remaining in the same axial position such that replacement of the cap makes it difficult to discern that the connection between the two parts has been severed, the neck portion according to this invention causes the ring to move in an axial direction away from the cap such that replacement of the cap leaves a very noticeable spacing between the two parts. Whilst the second threaded portion 13 is described as being a dual start thread, this is clearly not essential to the invention since a single start thread may still work effectively. Also, whilst one particular closure has been shown in the drawings, the invention could be clearly adapted for use with other types of closures.

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

Applications Claiming Priority (2)

Publications (2)

Family

ID=3771301

Family Applications (1)

Country Status (2)

Families Citing this family (2)

Citations (4)

Family Cites Families (3)

• 1986
  • 1986-10-02 EP EP19860905686 patent/EP0240521A4/fr not_active Withdrawn
  • 1986-10-02 WO PCT/AU1986/000289 patent/WO1987002009A1/fr not_active Application Discontinuation

Patent Citations (4)

Non-Patent Citations (1)

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