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
  • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
  • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
• • 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
  • B65D2401/45—Windows in external skirts for viewing tamper-element

Definitions

• This invention relates to the art of bottle closures., and more particularly to a compression failure resistant •5 tamper evident bottle cap.
• the tamper-evident band is normally smaller in diameter than a retaining flange on the bottle finish, and is pushed s over the retaining flange at the factory when the cap is installed.
• the band is connected to the rest of the cap along a weakened peripheral line, for example define by a series of perforations which weaken the material and provide a locus for failure when the cap is removed.
• An object of the invention is to reinforce a bottle cap o having a tamper-evident band against axial compression failure as described above.
• a compression failure resistant tamper evident bottle cap s including a skirt with a lower edge, and a tamper-evident band formed integrally with the skirt and having structure for engaging beneath a retaining flange on the bottle so as to prevent subsequent withdrawal of the band.
• Frangible bridges connect the band to the lower edge of the skirt.
• the skirt has one or more tabs or the like, extending downward over a portion of the band, for preventing undue diametral expansion of the tamper evident band as it passes over the retaining flange.
• Figure 1 is a top plan view of a compression failure resistant tamper evident bottle cap embodying the invention
• Figure 2 is a side elevation thereof
• Figure 3 is a detail of a portion of Fig. 2;
• Figure 4 is a sectional view taken on the plane 4 - 4 in Fig. 1, with a portion of the bottle finish added;
• Figure 5 is a detail of a portion of Fig. 4;
• Figure 6 is a similar detail, apart from the bottle finish;
• Figure 7 shows the bottle cap being installed onto a bottle
• Figure 8 is a view like Fig. 2, of a second embodiment of the invention
• Figure 9 is a view like Fig. 2, of a third embodiment of the invention
• Figure 10 is a view like Fig. 4, of a fourth embodiment of the invention.
• FIGS. 4 and 5 show the tamper-evident band 24 which is connected to the bottom of the skirt by a series of frangible bridges 26 designed to fail when the cap is removed from the bottle.
• the bridges must not fail when the cap is installed on the bottle at the factory, or they will give a s false indication of tampering.
• the amount of bridge flexure during installation is limited by providing, on the bottom edge of the skirt, structure which limits outward expansion of the band, and brings the skirt to bear directly down on the band, so that the bridges are not unduly stressed.
• This protective structure may take a number of forms. The one presently most preferred is that shown in the first seven figures.
• the skirt has a series of tabs 32 which extend downwardly, radially containing the uppermost part of the band.
• the windows 34 between the tabs are centered over the bridges, permitting one to see the bridges, and also facilitating manufacture.
• Figure 8 shows a modified form of the invention, which is the same in all respects as that previously described, except the there are no windows: the tabs are replaced by a continuous circular rim 36 which performs the same function as the tabs, perhaps with some added strength, but with the disadvantage that the bridges are hidden from view.
• the expansion-limiting structure 40 is, as in Figure 8, continuous, but axially abbreviated, so that one can still see the bridges.
• the internal lip 42 depicted provides a sealing function not important to the present invention.
• the expansion- limited structure at the bottom of the cap's skirt prevents the band from riding up over the cap during installation, and thus maintains the integrity of the bridges.
• the bridges can be replaced by functional equivalents.
• a circumferentially continuous thin connector strip, or a score line might connect the band to the skirt.
• the bridges might be fairly narrow, circumferentially, as shown in Figure 3, or they might have substantially width. Conceivably, they could be defined between a series of perforations in the cap material. Other variations may occur to people in this field. Since the invention is subject to modifications and variations, it is intended that the foregoing description and the accompanying drawings shall be interpreted as only illustrative of the invention defined by the following claims.

Landscapes

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

Applications Claiming Priority (6)

Publications (2)

Family

ID=25686277

Family Applications (1)

Country Status (6)

Family Cites Families (3)

• 1996
  • 1996-04-02 CA CA002216632A patent/CA2216632A1/en not_active Abandoned
  • 1996-04-02 AU AU56857/96A patent/AU710291B2/en not_active Ceased
  • 1996-04-02 EP EP96914874A patent/EP0819085B1/de not_active Expired - Lifetime
  • 1996-04-02 BR BR9604871-9A patent/BR9604871A/pt not_active Application Discontinuation
  • 1996-04-02 TR TR97/01093T patent/TR199701093T1/xx unknown
  • 1996-04-02 DE DE69603839T patent/DE69603839T2/de not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events