Membrane-sealed tube with a needle closure

Details Membrane-sealed tube with a needle closure Membrane-sealed tube with a needle closure

1996-12-16

1998-09-01

Huson, Gregory L.

Dispensing

With cutter and/or punch

To form dispensing opening in container

222542, 222546, B67D 500

Patent

active

057998299

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1.0. Field of the Invention
This invention relates generally to a container for liquid adhesive, more particularly a tube, comprising a membrane-sealed mouth and a cannula--with a bore extending over its longitudinal axis--inseparably fixed to the mouth and a closure cap releasably fixed to the cannula with a needle-like spike which is guided for displacement in the bore of the cannula and which is held fixed by its head element--thicker than its needle element--in a starting position in a recess of the closure cap provided with an access opening to the cannula with the opportunity for axial displacement into a membrane-piercing opening position.
2.0. Discussion of Related Art
Membrane-sealed tubes are known, for example, as adhesive packs for cyanoacrylate adhesives. Before the pack is used for the first time, the membrane is pierced by a needle-like spike so that the contents of the tube are released for emptying.
A container of the type in question is known from DE-A-41 26 477. In this container, a cannula is permanently fixed to the mouth of the tube. A closure cap is screwed onto the cannula. The closure cap is provided with a needle-like spike which is pressed into a recess in the closure cap to pierce the membrane. After the membrane has been pierced, the closure cap can be unscrewed and the adhesive can be removed from the tube through the cannula. The cannula is then closed again by replacing the closure cap, the needle-like spike being introduced with its needle element into the bore of the cannula. This known combination of a membrane-sealed tube and a cannula with a screw-on closure cap has the advantage that, after the container has been used for the first time, the closure cap can be unscrewed for the removal of more adhesive without any danger of the cannula being removed from the mouth of the tube during unscrewing of the closure cap through the presence of adhesive between the needle-like spike or the closure cap and the cannula, which would result in the unintentional escape of large quantities of adhesive from the tube. However, the problem of sealing the cannula outlet opening--with the closure cap screwed on--against the unwanted or unintentional escape of adhesive after the membrane has been pierced is not satisfactorily solved by this known adhesive pack. If, in the known closure, the needle-like spike is in its membrane-piercing opening position with the closure cap screwed on, the outlet opening of the cannula is sealed solely by the needle element of the spike in the cannula. Due to the usual manufacturing tolerances, the outlet opening of the cannula is not always completely sealed so that, when the membrane is pierced, for which purpose the user often holds the tube in one hand and presses the needle-like spike into the closure cap with the other hand, adhesive is in danger of issuing from the cannula and soiling the outer surface of the cannula and the adjoining surfaces of the closure cap. If, then, the closure cap is unscrewed to remove the contents of the tube, the adhesive which has already escaped is in danger of dripping and leading to unwanted soiling. However, the problem also arises that, when the closure cap is screwed back on, these residues of adhesive cause the closure cap and the cannula to stick together. When the contents of the tube are intentionally reused, the closure cap can only be unscrewed with difficulty, in some cases only through the application of force, through the presence of bonding adhesive between the cannula and the closure cap.


SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to improve the user-friendly properties of a container of the type in question.
In a container of the type mentioned above, the present invention includes a closure element formed on the spike between the head element and the needle element and bears sealingly against the cannula outlet opening in the membrane-piercing opening position of the spike.
If, now, the membrane sealing the mouth of the container according

REFERENCES:
patent: 5480064 (1996-01-01), Yan

Affiliated with

Also associated with

Rating

Membrane-sealed tube with a needle closure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Membrane-sealed tube with a needle closure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane-sealed tube with a needle closure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-260814