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
  • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
  • B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces 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
  • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
  • B65D51/1661—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of a passage for the escape of gas between the closure and the lip of the container mouth

Definitions

• the annular sealing lip engages in a sealing manner with the inner edge of the container mouth. It has been found in practice that the sealing action of the annular sealing lip is not sufficient in many cases, in particular on account of a deformation of the cap base under the internal pressure of the container. Moreover, even in the case of new containers which are filled for the first time, but in particular in the case of refilled containers, the container mouths may exhibit irregularities or damage which counteract(s) satisfactory sealing of the container.
• the object of the invention is thus to provide a screw-closure cap which has an annular seal on the cap base which seals against an inner side of a container mouth and in the case of which the problems outlined are avoided and by means of which satisfactory sealing is ensured even in the case of the container being reclosed and in the case of irregularly formed mouths.
• the screw-closure cap according to the invention is distinguished in that the annular sealing lip, which has a predetermined bending strength, at a radial spacing in the outward direction, is assigned a double annular rib which extends away from the inner side of the cap. base with a downwardly double tapering cross section and with a smaller height than the sealing lip and engages with the end side of the container mouth when the screw-closure cap is screwed on, and in that extending away from the transition region of the cap base into the lateral cap surface is another annular rib, with tapering cross section, which acts in a sealing manner on the outer side of the container mouth.
• the double annular rib, on its end side has two spaced-apart annular protrusions.
• a screw-closure cap 1 (illustrated only in part in Fig. 7), which is produced from plastic, e.g. by injection moulding or compression moulding.
• the cap 1 is intended for mounting on a container mouth 2, and has a lateral surface 3 and a base 4.
• the lateral cap surface 3 bears, on its inner side, a thread 6 via which the screw-closure cap 1 can be screwed onto a mating thread 5 on the outer side of the container mouth 2.
• the cap base 4 is bowed (doming effect) in the event of a build-up in pressure of the medium within the closed container. Consequently, an additional pressure is exerted on the radially outer sealing region 8 "of the container mouth 2 and the sealing rib 9 as a result of lever action, which means that there is an increase in the contact pressure per unit surface area in this region. It is on account of the wide range of different types of damage in this region of the container mouth 2 that the screw cap 1 according to the invention performs an additional important function, specifically for use in the drinks industry.
• the screw cap 1 according to the invention is preferably produced from plastic by injection moulding or by compression moulding.
• the container screw-closure cap 1 is made of plastic, preferably polyethylene, and has four sealing elements.
• the cap base 4 bows in a domelike manner.
• the inner seal 7 moves away from the container wall 2".
• the annular protrusion 8' lifts up slightly, but the outer side of the cap 1 presses more in the direction of the center of the container 2 and the extension 9 and the annular protrusion 8" is thus pressed to a more pronounced extent against the container mouth 2 and, in the process, seals the closure 1 again on the top out side of the container 2 and via the extension 9.
• the tamper evidence band (Fig. 2, 3) of a closure cap for returnable bottles (Fig. 1) has a more complex design than the tamper evidence band (Fig. 5, 6) of a closure cap belonging to a non-returnable bottle (Fig. 4).
• the tamper evidence band in the case of returnable containers, is to break off at only part of the circle (crack point 12 in Fig. 2) and shall remain connected to the cap 1 at the residual part of the circle.
• the sealing system 7, 8, 9 and the tamper evidence band of such a closure cap are tuned as described below. The point is to close a filled bottle by the closure cap 1 in such a way that neither the sealing system 7, 8, 9 nor the tamper evidence band (Fig. 1 to 3) are damaged.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (4)

Publications (2)

Family

ID=28685838

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (5)

• 2002
  • 2002-11-12 DE DE60213480T patent/DE60213480D1/de not_active Expired - Lifetime
  • 2002-11-12 AT AT02787652T patent/ATE334067T1/de not_active IP Right Cessation
  • 2002-11-12 EP EP02787652A patent/EP1492713B1/de not_active Expired - Lifetime
  • 2002-11-12 WO PCT/EP2002/012630 patent/WO2003084833A1/en active IP Right Grant
  • 2002-11-12 AU AU2002351976A patent/AU2002351976A1/en not_active Abandoned
  • 2002-11-20 AR ARP020104453A patent/AR037657A1/es active IP Right Grant

Non-Patent Citations (1)

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