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
• • 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

Definitions

• the present invention relates to a plastic closure cap for a container neck, comprising an end wall on which protrude in the same direction an outer skirt having internally means for fixing the capsule on the neck of the container. container and an inner sealing skirt cooperating by tightening with the inner surface of the neck to seal the latter.
• Capsules of this type have sealing skirts, either cylindrical or of more coinplexed shapes (for example with a first diverging frustoconical section followed by a second converging frustoconical section, with a cylindrical section followed by a foldable outer rim in direction of the end wall of the capsule, with cylindrical skirts having an outer rim or bead at their free end, with an olive or similar profile, etc.).
• These skirts of more complex shapes complicate the molding of the capsules. All these complex forms of sealing skirts aim to improve sealing, especially for pressurized liquids such as carbonated drinks, sealing preferably established in the vicinity of the free end of the skirt, therefore in a position set back by compared to the free edge of the neck.
• the present invention relates to a closure cap comprising a sealing skirt shaped so as to optimally meet these different requirements.
• object of the invention for plugging a container neck, comprising an end wall on which protrude in the same direction an outer skirt internally comprising means for fixing the capsule on the container neck and an inner sealing skirt cooperating by tightening with the inside surface of the neck to close off the latter, the inside skirt diverges at least externally in a truncated cone from its base towards its free end, at least the outside diameter of the skirt in the vicinity of its free end being greater than the nominal inside diameter of the container neck, the taper of the skirt being such that it does not interfere with the axial release.
• This conformation of the sealing skirt makes it possible to concentrate the tightening effect of said skirt against the interior surface of the neck of the container essentially in the vicinity of the free end of the skirt, which ensures both good sealing, a reduced unscrewing torque and optimal positioning of the skirt-neck contact insofar as the possible gas pressure inside the container reinforces the contact of the skirt with the container neck.
• the taper of the skirt is low enough to allow a simple axial demolding of the skirt.
• the frustoconical outer surface of the skirt may have a slope of between approximately 1 ° and 5 °, preferably a slope of approximately 2 °.
• the skirt may advantageously have, at its free end, an external chamfer whose internal diameter is less than the nominal internal diameter of the container neck.
• the inner surface of the skirt may be cylindrical or may also diverge into a frustum, in which case the taper of the interior surface is equal to or preferably less than that of the exterior surface of the skirt.
• the skirt may advantageously have a length of between approximately 3 and 6 mm, preferably a length of approximately 4 mm.
• the capsule according to the invention can be produced by molding from all the plastics commonly used for capsules with a sealing skirt, for example polyethylene, polypropylene or the like.
• FIG. 1 is an axial section of a capsule according to the invention
• - Figure 2 shows, on a larger scale, detail II of Figure 1 showing the profile of the sealing skirt.
• the closure cap 1 as illustrated in FIG. 1 comprises a capsule body 2 and a tamper-evident band 3 molded in one piece with the body 2.
• a tamper-evident band 3 molded in one piece with the body 2.
• the tamper-evident band 3 does not is not within the scope of the present invention, there is no need to describe it in more detail.
• the capsule body 2 essentially comprises an end wall 4, an outer skirt 5 which projects from the wall 4, on the outer edge of the latter, and has internally a thread 6 and externally a knurling 7, and a skirt d 'inner seal 8 which projects from the wall 4 in the same direction as the skirt 5, in a position concentric with the latter.
• the sealing skirt 8 is intended to cooperate, when the cap 1 is screwed onto a bottle neck 9 shown diagrammatically below the cap 1 in FIG. 1, by tightening with the inside surface of the neck 9, this surface having a nominal inside diameter Di9.
• the sealing skirt 8 diverges in a truncated cone, both internally and externally, from its base (end wall 4) towards its free end.
• the outer surface of the skirt 8 has a slope and the inner surface a slope ⁇ .
• the maximum external diameter De8 max in the vicinity of the free end of the skirt 8 is greater than the internal diameter Di9 of the bottle neck 9.
• the skirt 8 has, at its free end, an external chamfer 10 whose internal diameter DilO is less at the nominal inside diameter Di9 of the bottle neck 9.
• the minimum external diameter De8 min of the skirt 8 having a length L8 of the order of 4 mm can be of the order of 25.48 mm and the maximum outside diameter De8 max of the skirt 8 of the order of
• the two angles of slope ⁇ and ⁇ of the outer surface and of the inner surface of the skirt 8 could be different, the angle ⁇ then being less than the angle ⁇ and may even be equal to 0 °, depending for example on the material of the capsule, the length of the skirt 8, the thickness of the skirt 8, the diameter of the bottle neck, etc.

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

Priority Applications (10)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8847783

Family Applications (1)

Country Status (10)

Cited By (4)

Families Citing this family (1)

Citations (4)

• 2000
  • 2000-10-13 WO PCT/FR2000/002871 patent/WO2002030776A1/fr not_active Application Discontinuation
  • 2000-10-13 IL IL15529200A patent/IL155292A0/xx unknown
  • 2000-10-13 EP EP00968047A patent/EP1324926A1/fr not_active Withdrawn
  • 2000-10-13 MX MXPA03003080A patent/MXPA03003080A/es unknown
  • 2000-10-13 AU AU2002242349A patent/AU2002242349A1/en not_active Abandoned
  • 2000-10-13 PL PL00361094A patent/PL361094A1/xx not_active Application Discontinuation
  • 2000-10-13 CA CA002412366A patent/CA2412366A1/en not_active Abandoned
  • 2000-10-13 TR TR2003/00464T patent/TR200300464T2/tr unknown
  • 2000-10-13 HU HU0300991A patent/HUP0300991A2/hu unknown
  • 2000-10-13 BR BR0017353-3A patent/BR0017353A/pt not_active IP Right Cessation

Patent Citations (4)

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