DE1961902U - EXPANSION CAP MADE OF THERMOPLASTIC PLASTIC FOR BOTTLES OD. DGL. - Google Patents

Description

. Expansion lock

Firing refers to a one-piece expansion closure made of thermoplastic material for bottles or the like and relates in particular to an inner capsule closure or hollow plug, the sealing surface of which with the help of a frustoconical Disc ring part of the capsule base is braced by pressing this part flat.

In known clamping locks, the clamping means is directly connected to the sealing capsule wall or seal usually also with the middle of the lock or the handle in the Middle of the clasp. Attempts were also made at the crossing points of the capsule base, which is designed in the manner of a disc spring, weakens the wall towards the center and the sealing surface in order to prevent the snap-in process when it is pushed through, i.e. when Opening and closing the lock, to promote or to make it possible in the first place. In all of these cases, however, the Clamping force directly on the sealing surface with the full expansion path that can be achieved by the pressing movement of the clamping disc transfer. But if the tolerances of the container opening are significant, what often happens with glass containers is the The sealing effect is very different, so that if the neck of the container is too narrow, the clamping movement will not take place at all or only with great difficulty can be carried out or vice versa if the neck of the container is too wide the intended stronger sealing effect does not materialize. The innovation avoids this disadvantage in that the truncated cone iform disk ring part of the capsule base outwards to the sealing surface and inwards towards the center in each case in one to the Container axis conical partition wall at an acute angle transforms.

The acute-angled partition walls allow their resilient As an alternative, an adaptation to the respective container diameter and have the consequence that the with regard to the Expansion path otherwise necessarily smaller selected outer diameter the seal, i.e. the inner capsule, can be kept larger. This means that in most cases the effective one Expansion path and thus the specific sealing effect of the

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Closure can be improved. In addition, the innovation-appropriate Sealing process soft in front of you, which is particularly desirable for a row of containers, e.g. with thin-walled glass necks is. '-. ■ * - -

In the figures, the innovation is shown, for example:

Fig. 1 and Fig. 2 show the new closure with a smooth

Sealing surface in cross section

Fig. 3 and Fig. 4 show a similar closure in the

Cross-section with an additional sealing bead. .. '.:'

As can be seen from FIG. 1, the outer diameter of the sealing surface 6 of the closure 2 (inner capsule) corresponds approximately to the inner diameter of the container 1. When the closure 2 is tensioned, i.e. when there is vertical pressure on the tensioning base 3, the expansion path of this section does not act directly on the sealing surface 6, but first on the resilient partition walls 4 and 5j, which run conically at an acute angle oO and ß to the container axis, which in turn act in a Pass over the steeper position while reducing the angles oi / and ß, thereby facilitating the clamping process and ensuring that the sealing surface 6 rests softly and snugly on the container wall 1.

The wall thickness of the clamping element 3 is kept somewhat larger than the rest of the wall of the closure to prevent sagging Avoid tension. For this purpose, reinforcing ribs can just as well be arranged, which are radially above and / or run below the clamping part 3.

A clamping ram 7 is provided in the middle of the closure 2, according to the innovation - as a handle for tensioning and at the same time serves as an outflow pipe. This outlet pipe is expediently closed with "a material hat, which, as is known, by Cropping can be removed. In the case of the container neck 1 shown with a bead, however, the closure is also one of outflow pipe open from the start with the help of a crown cap or a film possible that covers the entire expansion seal covered after the inflation.

In Fig. 2, the new closure 2 is equipped with a sealing bead 6, which, for its part, is a resilient intermediate

Claims (1)

RA.680 021 * 27.ΪΖ66 / '_ 3 - wall 4, 5 is formed and, under the tension de / s Insert the cap base 3 into the corresponding sealing groove in the container wall 1. . The concept of firing is not restricted to the exemplary embodiments shown, but also relates to shorter or shorter ones longer lock designs, which are used as hole locks for cans or as an expansion stopper for bottles. Schutζansρräche: Claim, l) One-piece expansion seal made of thermoplastic Plastic for bottles and containers with a central frustoconical Seheibenringpartie, the after axial pushing through, the sealing surface connected to it expands in the circumference, characterized in that that the frustoconical Seheibenringpartie 3 to the outside to the sealing surface 6 and to the inside Center 7 in each case into a "resilient partition wall which runs conically to the container axis at an acute angle 4, 5 passes. . -. ■■ Claim 2) One-piece expansion lock according to Claim l) characterized in that the wall thickness of the truncated cone-shaped Seheibenringpartie 3 is greater than that of the resilient connection walls 4, 5 and / or the Seheibenringpartie by radially extending ribs is reinforced. Claim 3) One-piece expansion closure according to Claim 1 and 2 characterized in that in the middle of the frustoconical Seheibenringpartie 3 an outflow pipe 7 is arranged as a handle for tensioning and releasing the lock, Claim 4) one-piece expansion closure according to claim 2 and 3, characterized in that the outflow pipe 3 through a material plug 8 is closed, which is used for Opening is cut off or canceled and then through a cap or the like. be replaced can.