Dispensing – Movable material discharge guide – Foldable – bendable – collapsible or flexible
Patent
1996-10-03
1998-12-22
Huson, Gregory L.
Dispensing
Movable material discharge guide
Foldable, bendable, collapsible or flexible
222538, B67D 300
Patent
active
058509526
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a container having a snapped-in valve adapter, and in particular, to a container having a snapped in valve adaptor in which an arrow projects out of a tangential plane of the adaptor and acts elastistically with one of several recesses on the periphery of the container when locking and unlocking.
BACKGROUND AND SUMMARY OF THE INVENTION
Valve adapters according to the invention are used for opening and closing the valve gate disposed in the interior of the valve and reachable with the adapter from outside. In particular the inventive valve adapter is provided with a discharge pipe and a handle. When the handle is operated e.g. the valve gate is opened via a small valve pipe, the so-called valve stem, through which the substrate flows out and thus passes into the adapter pipe. Adapters of this type are used particularly on pressure cans for holding the substrate together in the adapter pipe and discharging it selectively when the valve has been opened. Such adapters frequently have at the outer end of the adapter pipe a clamping joint for an extension pipe which can be slipped on and used for discharging the substrate selectively upon operation of the handle even when the substrate must emerge at a large distance away from the valve. An example of such applications of the invention are polyurethane foams in cans which are used mainly in the construction trade for sealing members.
According to the invention the adapter and valve are produced separately, the adapter being held together with the container in which the substrate is filled until the substrate is to be discharged. This is done in particular with small drums which contain relatively small amounts of substrate and whose valve and adapter must be of relatively simple design. In these and other cases of application of the invention the valve and adapter generally consist of separate plastic parts.
According to the invention the valve adapter has a snap-in locking device which serves to positively connect the adapter temporarily with the container having the valve and containing the substrate so as to guarantee that the adapter is available when the substrate is to be discharged. Such snap-in connections make outer packages superfluous which enclose the parts but are undesirable in the interests of avoiding packaging waste. The inventive snap-in locking device permits the valve adapter to be used several times if only partial amounts of the substrate are consumed and the valve adapter is to be held ready reliably between several of these processes.
When the invention is applied to cans, in particular pressure cans as are used e.g. for polyurethane foams, the gap is expediently provided in the can cap which has up to now served only to cover the valve to exclude untimely actuation of the can valve. Because of their comparatively low value, such and other drums must be finished on fast-working packaging machines. Up to now these have generally been filling machines which output the capped and ready labeled pressure can.
Up to now it has been common practice to have usually female workers unite the can cap with the valve adapter and snap them together by hand. Although this involves considerable labor, known snap-in locking devices cannot be united mechanically, not even when the can is already provided with the cap.
This is impossible in particular with a known valve adapter (DE-GM G 92 09 492.9) which can be connected positively with a can cap with the snap-in locking device. This is because the cap cover has a gap and the edges of the gap form a connecting link guide extending axis-parallel to the can and its cover. The projection serves as a sliding block and must therefore be introduced into the connecting link through the gap in the can cap from above. In a packaging machine this requires a change of direction since the adapter must first be guided radially over the can cap and then introduced axially into the connecting link. Such motions are difficult to realize and furthermore requires the conn
REFERENCES:
patent: 4819838 (1989-04-01), Hart
patent: 5178354 (1993-01-01), Engvall
Bruno Jesswein Inh. Werner Morck Kunststofftenchnik
Huson Gregory L.
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