Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1984-05-17
1986-09-23
Rolla, Joseph J.
Dispensing
With cutter and/or punch
To form dispensing opening in container
222135, 22240225, 222541, B67B 724
Patent
active
046130616
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a valve fitment or insert for a two-chamber compressed gas packaging means for separately storing two components of a product, in an inner and an outer container, and for mixing the components within the outer container directly before discharge of the mixture, comprising a cover which has a discharge pipe in a central through opening, for closing an opening of the outer container, which is smaller than the diameter of the outer container, comprising a resilient annular seal which seals the discharge pipe against the through opening and in which the discharge pipe is guided for axial displacement from an outer limit position into an inner limit position, for piercing a wall portion of the inner container, and comprising a valve which is manually actuable for triggering discharge of the mixture.
In a known valve fitment or insert of that kind (U.S. Pat. No. 3 134 505), a valve having a valve stem and a valve seat is formed in the outer end portion of the discharge pipe, one end of the valve stem being extended out of the discharge pipe and carrying a cap nut. Disposed one above the other between the nut and the edge of the cover are a spacer member and a discharge cap which is provided with a discharge nozzle, in order to hold the discharge pipe in its outer limit position. After the spacer member is removed, the pipe can be pushed further into the outer container, in which case the bottom pointed edge of the opening thereof pierces an upper wall portion of the inner container. In the inward limit position, the discharge cap is seated in the substantially plate-shaped cover, the cap enclosing the outer end of the discharge pipe. In that limit position, the components which are contained in the inner and the outer containers can be mixed. Thereupon, the cap nut is at least partially slackened so that the valve stem can be displaced and the valve opened. That arrangement does not ensure that discharge of the content of the outer container is not triggered off before it is mixed with the other component of the mixture, as release of the nut and the thus opening of the valve can occur, intentionally or unintentionally, before the components of the product are mixed.
The invention is based on the problem of providing a valve fitment of the general kind set forth, which ensures that discharge of the mixture cannot take place before the components of the product are mixed.
According to the invention, that problem is solved in that, on its inside, the cover has a coupling means which is disposed around the discharge pipe and which has through openings for the components of the product, for coupling the inner container to the cover, and that the valve can be actuated by displacement of the discharge pipe from the outer limit position in which the valve is closed, by way of an intermediate position in which the wall portion of the inner container is pierced and the valve is still closed, into the inner limit position in which the valve is opened.
With that construction, the valve can necessarily be opened only after the components of the product have been mixed. The valve insert can therefore be used for outer containers wherein a cylindrical container portion and a substantially conically tapering upper portion of the container are made in one piece, as is the case with most of the aerosol cans which are produced at the present time. That is possible because of the act that the inner container can be coupled to the cover so that the inner container does not need to be supported and centred in the outer container. The inner container may be of such a small diameter that it can be passed through the opening in the outer container, which is subsequently closed by the cover. At the same time, the coupling means ensures that there is a defined distance between the wall portion, which is to be pierced, of the inner container, and the lower end of the discharge pipe, in the limit position thereof, irrespective of the respective axial length of the inner container.
The annular seal can then be an an
REFERENCES:
patent: 3080094 (1963-03-01), Modderno
patent: 3134505 (1964-05-01), Modderno
patent: 3255924 (1966-06-01), Modderno
patent: 3603483 (1971-09-01), Morane et al.
patent: 4340155 (1982-07-01), Obrist
patent: 4469252 (1984-09-01), Obrist
Fuhrig Wolfgang
Meuresch Herbert
Deutsche Prazisions-Ventil GmbH
Huppert Michael S.
Rolla Joseph J.
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