DE2336153A1 - DISPENSING CONTAINER FOR FLOWABLE GOODS - Google Patents

Description

SIKA AG formerly Kaspar Winkler + Co Zurich

(Switzerland)

Dispensing container for flowable goods

The invention relates to a dispensing container for flowable goods, with a container body which has an outlet opening at one end and in which a piston rod moves towards the outlet opening advancing displacement piston is mounted, the piston rod by a spring-loaded which can be moved back and forth by Hans Actuator is advanced, and, a first, in operation stationary supported backstop secures the displacement piston against displacement away from the outlet opening, and a second backstop couples the displacement piston to move the actuator jointly on the working stroke of the actuator.

Such a dispensing container is for example from the US patent 3,255,935 known. In this case, the piston rod leads through the displacement piston and is slidably mounted in it. The two backstops are designed in one piece as a spring cross and on the side of the remote from the outlet opening Piston arranged. The one ends of the arms of the spring cross grip the inner wall of the container body and the other ends of the arms of the spring cross on the piston rod. This is by pressing a firmly attached button against the Effect of a spring in relation to the displacement piston of the

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From las soff η ting displaceable away, the piston by engaging of the spring cross is prevented from returning to the inner wall of the container, if you then let go of the button, the spring presses the button returns to the starting position, taking the piston rod and the displacement piston with it in the direction of the outlet opening, where the donation process takes place.

This construction has significant disadvantages. First, the piston does not have to rest against the inner wall of the container body only on its circumference be sealed, but also against the piston rod passing through the piston. Second must be the piston rod be guided axially displaceably at another point, e.g. through a bearing socket on the container body, because the Guiding by the piston alone is not sufficient to achieve an exact axial displacement of the piston rod with respect to the piston guarantee. But if such a guarantee is not required, the effectiveness of the mentioned second sealing point is between Piston and piston rod not required.

Third, since the piston rod penetrates the displacement piston, it inevitably comes into contact with that in the container body existing good. This restricts the possible choice of material for the piston rod, as this material (as well as that of the container body and the piston) must be compatible with the goods to be dispensed.

Finally, such a construction also prohibits the sealing of the displacement piston from the inner wall of the container body by means of a roll bellows, if the goods to be dispensed are particularly aggressive and / or sensitive to air access reacting substances.

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All these disadvantages are largely avoided in the proposed dispensing container in that, according to the invention, in this case the two backstops at a distance from each other on the with respect to the displacement piston upon actuation of the actuator attack the immovable piston rod.

Because the two backstops are axially spaced on the piston rod attack, they also take over their axial guidance .; No further guidance is required »As the piston rod When the actuating member is actuated, it does not move relative to the piston / the sealing point between the piston is omitted and piston rod *

It can be said that while in the case of the container mentioned above the "freewheel" formed by the two backstops between the piston and the piston rod is switched on, according to the invention proposed container a similar acting "freewheel" is switched on between the actuator and piston rod and on this only two at an axial distance located places works.

Further details can be found in the following description of exemplary embodiments of the subject matter of the invention based on the drawing * It shows;

Figure 1 shows a dispensing container in axial section,

FIG. 2 shows a detail from a section according to FIG Line II-II in Figure 1 on a larger scale /

Figure 3 a variant, also in axial section *

According to the figure 1 is a cylindrical container body 1 ir.it his an outlet opening 2 facing away from the end in an annular socket 3 releasably anchored, which socket on a

bell-shaped base 4 is formed. The base 4 has a bearing stub 5, in which a piston rod 6 is one in the Container engaging piston 7 is guided axially displaceably. A clamping member is located in a recess 8 of the bearing stub 5 9, the design of which can be seen clearly from FIG. Thereafter, the clamping member has two clamping tongues 10 which are directed against one another and are bent out of a plate 110 made of spring steel sheet to the same side. Grab with their ends the tongues 10 resiliently on the piston rod 6, wherein - as it is readily apparent from the drawing - the latter in the direction of the arrow P, but not shifted in the opposite direction can be. The clamping member 9 thus acts as a backstop.

Another clamping member 11, which is located at a distance behind the first clamping member 9, interacts with the piston rod and is identical to the same both in design and in relative arrangement with respect to the piston rod. This Clamping member 11, however, is not fixed, but movable, namely in a recess provided on a hand lever 12 (FIG. 1) stored. The lever 12 is hinged at 14 to the base 4 and in the present case with the help of a weakened wall, which connects the lever 12 to the base 4 in one piece. It goes without saying that the lever and the base are advantageous are made of a suitable plastic. Opposite the lever, the base 4 has an extension 15 which acts as a handle cooperates with the lever 12. A return spring 16 is clamped between the lever 12 and the base socket-5.

If the lever is now operated, i.e. counterclockwise as shown in the drawing pivoted, so the piston rod 6 is with the help of

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Clamping member 11 is pushed forward accordingly, so that the piston allows the filling material, e.g. window putty or another sealing compound, through displaced the outlet opening. The return spring 16 then returns the lever 12 to the starting position, with the piston rod is held by the clamping member 9. If the container body has been completely emptied by repeating this process, so the entire container 1 together with the piston 7 and the drive device can be thrown away.

The same applies to the embodiment according to FIG. With the same the container body 17 has a cylindrical extension in which the storage in a manner not shown 19 for the piston rod 20 and for the fixed clamping member 21 is accommodated. This clamping member is designed similarly and stored like the clamping member 9 of the first embodiment. The same applies to the second clamping member 22. The latter is located also here on a hand lever 23, which is through the extension, 18 and anchored in an articulated manner at one end in a recess 24 thereof, diametrically opposite in a recess 25 is performed with play, so that it can be actuated in the direction of a handle 26 protruding radially from the extension. For The spring 27 is used to reset the lever.

In this embodiment, too, all parts can be made from a plastic material can be manufactured practically without the need for post-processing, with the manufacturing cost being a one-off Enable or justify use.

This is particularly due to the fact that the clamping members are commercial goods in their illustrated form. You will though

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used in a completely different context and in a completely different function than in the present case, namely as anchoring organs (Nuts) for screws or the like.

It should be noted that the described dispenser container is in contrast allows precise and positive dosing of the dispensed goods in addition to the previously known dispensing container mentioned at the outset. In the case of the previously known container, the dispensing process follows the return of the actuating element, i.e. by the action of the spring alone. While with the proposed dispensing container there are differences in the viscosity of the goods to be dispensed (e.g. as a result of a change in the ambient temperature) can be easily compensated by exerting an appropriate force on the actuator, this is not possible with the previously known container.

Thanks to these beneficial properties along with his The proposed dispensing container is easy to manufacture as a disposable packaging for casting compounds, putties, cosmetics, Dental care products, veterinary products, even predestined for spice pastes.

Claims (5)

Godfather claims 1) Dispensing container for flowable goods, with one end a container body having an outlet opening in which a can be advanced towards the outlet opening by means of a piston rod Displacement piston is mounted, the piston rod by a manually movable back and forth, spring-loaded Actuator can be advanced. and wherein a first, in the effective position, fixedly supported backstop Displacement piston secures against displacement away from the outlet opening and a second backstop secures the displacement piston during the working stroke of the actuating member for joint movement coupled thereto, characterized in that that the two backstops (9, 11) are at a distance from each other on the piston rod which cannot be displaced with respect to the displacement piston when the actuating element is actuated attack. 2) dispensing container according to claim 1, characterized in that each of the backstops (9, 11) on diametrically opposite one another Attack points on the piston rod and cooperate with this in the direction of advance in a free-wheeling manner, with the one backstop (9) stationary with respect to the container body and the other backstop (11) with the actuating member (12,23) is movably supported. 3) Dispensing container according to claim 1, characterized in that the spring (16, 27) acting on the actuating member (12, 23) is supported between the backstops (9, 11). 4) dispensing container according to claims 2 and 3, characterized in that that the stationary backstop (9) is at a point on the piston rod that is closer to the displacement piston (6,20) acts as the backstop which is movable with the actuating member (12,23). 5) dispensing container according to claim 2, characterized in that both backstops (9, 11) directed against one another,
have resilient tongues (10), which with each other a
Attack with their ends on the piston rod (6, 20), which are less than 180 ° and point towards the displacement piston. Blank page