Bottles and jars – Neck – Structure to receive a particular closure
Patent
1996-04-05
1998-03-03
Cronin, Stephen
Bottles and jars
Neck
Structure to receive a particular closure
215 45, 215330, 215344, 215352, B65D 102
Patent
active
057225451
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The Invention relates to a twist-off closure, also called fractal closure for any container having a closures cap and a container head. The closure is provided for a container of arbitrary dimensions, and of arbitrary design to be closed with a closure cap, wherein the container includes an integral container head with an opening for dispensing liquid, paste-like, or potable substances.
For closing of containers predominantly used in households, there exist stoppers, crown caps, and closure caps, the latter in the form of classical screw caps, preferably with an inner thread and a closed-off bottom or cover, or in a more recent configuration, with an integral hinged lid, also called one-hand hinged lid cover. Opening a classical screw cap requires more than half a turn, generally an entire turn or more, which is quite disadvantageous for the user.
With containers used with their opening pointing downwardly, e.g. tooth paste tubes, the contents can be released prematurely and unintentionally. Lid covers can open by themselves, especially when some of the contents of the container is spread around the exit opening which occurs quite frequently with paste-like products. The hygienic imperviousness of the lid cover is then not always assured. In order to overcome the aforementioned disadvantages, several technical solutions are known.
2. Description of the Related Art
Closures are described in DE 37 42 692 A1, DE 40 29 467 A1, DE 29 13 883 A1, and DE 32 47 353 A1 which will open completely after only 1/4 turn and which do assure a noticeable engagement and disengagement of the closure when the closure is turned. In order to accomplish this, circumferential beads, latching grooves and cams, as well as lips are employed. The threads are multiple-start threads with a pitch angle between to 30.degree. and 45.degree..
In GB 21 81 721 A, a closure is described where a fin is provided on the container head, but where this fin is utilized as a stop for defining the relative orientation between the closure cap and the container.
It is a disadvantage of the aforementioned technical embodiments that tightness of the closure against release of the container contents is not automatically guaranteed in case that the container is only negligently closed by merely twisting the closure cap up to the pressure point. The cap always has to be tightened until the final stop, i.e. beyond the pressure point.
From GB 2 203 729, there is known a closure type with thread sections arranged around the neck of the container, the thread sections corresponding to similar thread sections of the closure cap. In addition, each thread section comprises a fin. Thread sections and fins are constructed in a way that the during closure process portions of the thread sections can catch behind the fins.
Subject matter of the U.S. Pat. No. 5,009,323 is a closure with a standardized threaded cap, the cap comprising around its circumference a strip made from frangible material, whereby the strip is intended as protection against misuse and unauthorized opening.
In addition, the design and functionality of this freshness seal is described.
A sealing lip is provided on the container head of the closure which is received by the cylindrical portion of the cap when the closure cap is turned to open.
It is therefore an object of the invention to provide a generic twist-off closure which 180.degree. twist angle), (clamped), and (not tightened until the final stop).
SUMMARY OF THE INVENTION
This requirement is realized by way of the following characteristic features:
The twist-off closure according to the invention is characterized in that the container head comprises at its upper portion a sealing lip formed as a circumferential bead, a steep, multiple-start thread, and a number of fins equal to the number of threads. Here, several thread sections are provided which are distributed over the circumference at the lower portion of the container head, which are displaced in relation to each other, and which
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patent: 4770308 (1988-09-01), Lynn
patent: 5009323 (1991-04-01), Montgomery et al.
patent: 5184741 (1993-02-01), Chevassus et al.
patent: 5533633 (1996-07-01), King
Cronin Stephen
Dental-Kosmetik GmbH
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