Bottles and jars – Closures – Closure pivoted about receptacle opening
Patent
1988-11-09
1991-01-08
Marcus, Stephen
Bottles and jars
Closures
Closure pivoted about receptacle opening
215363, B65D 4720
Patent
active
049828550
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a closure cap for a bottle or like container.
PRIOR ART
Known screw-type closures for bottles are essentially shaped like caps. The cylindrical part of the cap is provided with internal threads by which the cap may be screwed on external threads of a bottleneck. The bottom of the closure cap consists of a disc-like sealing member which tightly abuts upon the upper edge of the bottleneck when the screw-type closure cap is tightened. To open a bottle closed with such a screw-type closure cap, it is required to completely unscrew the cap. Thus, it may fall on the dirty ground, or it may even become lost. Moreover, it is an effort to screw the closure cap on the bottle again after use.
As a matter of fact, for beer bottles, snap-on closure caps are known which are undetachably fixed to the bottleneck, but they are very costly. Furthermore, they cause difficulties in cleaning as they are permanently fixed to the bottle.
DE-OS No. 14 32 188 dislcoses a screw-type closure cap having a friction cork, which is separate from the screw-type closure cap, the friction cork being connected by friction and form to the screw-type closure cap. Thus, the friction cork is nothing more than a special form of sealing which is unmovably connected to the screw-type closure cap. Consequently, this known screw-type closure cap has the same disadvantages as screw-type closure caps mentioned above.
U.S. Pat. No. 2,950,833 disclose a screw-type closure cap, the bottom of which consists of two disc halves which are hinged to a common diametrical axis. The flaps thus formed, loosely rest upon the upper end of a cylindrical cap. When emptying the container, the flaps fold up. A tight closure is not possible with such a screw-type closure cap.
THE INVENTION
It is the object of the invention to provide for a bottle or like containers a screw-type closure cap of the type described which eliminates the risk of falling off the bottle and, thus, of being soiled or getting lost, and which should, moreover, be cheap to make.
The screw-type closure cap constructed according to the invention permits pouring the contents out of the bottle by slightly loosening the screw-type closure cap. When the closure cap is slightly loosened and the bottle is tilted to a horizontal position, a disc-like sealing member in the cap rotates about its axis due to the pressure of the liquid in the bottle, and the loading on such sealing member. The portion of the sealing member which is below the rotational axis, moves outwardly so that liquid may flow out, while the portion of the sealing member above the rotational axis, simultaneously moves slightly inwardly so that air may enter the interior of the bottle, so that no counter pressure is produced which might impede the flow. Thus, the bottle may be emptied without removing the screw-type closure cap; it is sufficient to loosen the screw-type closure cap slightly. The cap cannot fall down, become soiled or get lost. Moreover, it is not necessary to screw on the cap completely to close the bottle since the cap always remains partially screwed on the external thread of the bottleneck. For complete closing, it is necessary to turn the screw-type closure cap in the closing direction, whereby an annular sealing surface on the sealing member tightly abuts against the upper end of the bottleneck, particularly in the area of its inner radial edge.
Due to the geometry of the closure cap, the tilting movement of the disc-like sealing member depends on the orientation of the disc axis which changes with the rotary position of the internally-threaded cylindrical portion of the cap. Consequently, the cross-section of the opening may be adjusted by varying the rotary position of the cylindrical part. This in turn permits regulating the flow of liquid.
The rotational axis of the disc-like sealing member may fall on the axis of the cylindrical cap, i.e., across the diameter of the cylinder, so that with the tilting of the disc-like sealing member, the flow-out cross-section is approximately equal to
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patent: 1087303 (1914-02-01), Lamb
patent: 1363983 (1920-12-01), Knudsen
patent: 1723799 (1929-08-01), McDougall
patent: 2950833 (1960-08-01), Short
patent: 4441637 (1984-04-01), Libit
Marcus Stephen
Stucker Nova
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