Dispensing – With flow controller or closure – Rotary – axially
Patent
1997-08-07
1999-08-03
Bomberg, Kenneth
Dispensing
With flow controller or closure
Rotary, axially
222556, 222560, B65D 4720
Patent
active
059313579
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to closure arrangements for containers, and especially bottles, used with flowable material.
BACKGROUND OF THE INVENTION
Most bottles are closed by screw caps, or by caps relying on frictional or snap fit. Screw caps are reliable, effective for large openings, and resistant to inadvertent opening and internal container pressure. However they are slow to use, liable to be lost, and sometimes become stuck or cross-threaded. Frictional and snap caps have low security against internal pressure and decrease in security with repeated use.
My aim is to provide new and useful container closure arrangements which may avoid some of these problems.
THE INVENTION
In one aspect I propose a closure arrangement functioning essentially as a cap which uses tilting of a peripheral seal into and out of engagement with the neck, about a tilting axis generally transverse to the neck axis, to move between closed and open conditions while remaining trapped on the neck at the neck opening; the cap makes a sliding guide engagement with a spherical surface zone of the neck wall to guide the tilt.
In a specific aspect I propose a closure arrangement for a container of flowable material, comprising a neck and a closure cap for the neck;
the neck having a neck wall defining a circular neck bore having a top opening and having a substantially spherical surface zone which is on the inside and/or outside of the neck, substantially coaxial therewith and provides an overhang of the neck wall adjacent the top opening;
the closure cap comprising an upper cap portion at the neck opening and at least one integral downward extension which engages the neck wall's spherical surface zone with a sliding guide engagement and makes a trapping engagement beneath the neck wall overhang to trap the closure cap on the neck, the cap portion and downward extension of the closure cap further providing at least one cover in the form of a closed web to block the neck bore and an annular peripheral seal for the cover;
the cover and peripheral seal of the trapped closure cap being tiltable relative to the neck, in a tilting movement guided about an axis transverse to the neck axis by at least the sliding guide engagement of the closure cap with the neck wall's spherical surface zone, between a closed condition in which the peripheral seal engages around the neck wall's circumference so that the cover blocks the neck bore and an open condition in which at least part of the peripheral seal tilts clear of the neck wall to open a flow passage around the cover.
Further more specific options are described in the sub-claims.
A coaxial spherical neck zone has the advantage of enabling e.g. seen in prior art constructions using tiltable nozzles and flaps;
Annular sealing around the neck wall can avoid the highly restrictive neck bore constructions required for sealing in the mentioned prior art.
A tiltable cap-type closure with a web-form cover can be easier and cheaper to make and more versatile, especially in plastics, than a ballcock-type closure.
Note that precise sphericity is not needed but the sphericity must be sufficient to provide the appropriate functions as set out herein.
The neck wall may have spherical surface zone portions on its inner and/or outer surface. Where there are both interior and exterior spherical zones they should be substantially concentric. The closure cap may have an exterior downward extension around the neck exterior and/or an interior downward extension into the neck bore. The guide engagement is made with a spherical surface zone, inside and/or outside the neck. Extra guide engagements, for example fulcrum points or axial or circumferential cams, may be used if desired. The trapping engagement requires overhang created by upward divergence on the neck exterior and/or upward convergence on the neck interior. Either of these may be provided by a corresponding spherical surface zone although this is not essential. Furthermore, while the sliding guide engagement requires an arcuate enga
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patent: 1430313 (1922-09-01), Millity
patent: 1960393 (1934-05-01), Otten
patent: 2127465 (1938-08-01), Church
patent: 2152270 (1939-03-01), Nyden
patent: 2185248 (1940-01-01), Wilson
patent: 2209050 (1940-07-01), Church
patent: 2209062 (1940-07-01), Lusher
patent: 3410461 (1968-11-01), Barker
patent: 5156302 (1992-10-01), Kuitems
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