MXPA97002491A

MXPA97002491A - Closure for bottles or similar

Info

Publication number: MXPA97002491A
Application number: MXPA/A/1997/002491A
Authority: MX
Inventors: Hertrampf Michael; Breuer Hanswerner
Original assignee: Safety Cap System Ag Richterswil Ch
Priority date: 1994-10-11
Filing date: 1995-09-22
Publication date: 1998-04-01

Abstract

The present invention relates to a closure for a bottle having a neck with a front surface and a forntal rim, the closure includes a lid-like closure portion having an edge, a projection directed inwardly over the rim to ensure with a projection directed outwards on the neck of the bottle and in the interior, in the area of the front edge of the neck of the bottle, and a front surface of the neck of the bottle, characterized in that the closing part in the form of a lid has a base and the sealing surface has a cone-shaped sealing surface pad, which is formed on the radial inner side of an axially directed portion in the direction of the base of the closure part, the sealing surface part is secured around from the outside of the neck of the bottle and inclined radially inwards and axially against the direction of the screw

Description

* - CLOSURE FOR BOTTLES OR SIMILAR DESCRIPTION OF THE INVENTION The present invention relates to a closure of the type mentioned in the general concept of the claim for a bottle or the like. It is known from document DE 42 34 010 Al un. closure for a bottle or similar, which presents a portion in the form of a lid, which on its edge presents an inwardly directed projection for hanging to an outwardly directed projection on the neck of a bottle or the like and on its interior in the area of the front edge of the neck of the bottle presents a sealing zone. This is located in a seal included in the bottom area of the closure portion, which has a recess in the base of the front area of the lid-shaped closure portion, extending from the radial area inwardly of the closure portion. the sealing surface of a frontal surface from the neck of a bottle radially outward. The sealing surface to be placed on the front edge of the neck of the bottle is at the end opposite the base of the closure in the form of seal cap, where the seal has along its outer edges a projection opposite the bottom of the seal. the closure portion, which surrounds the neck of a bottle externally in the axial direction. The notch in the seal at the front end to the base of the closure portion makes it possible to raise the seal of the front surface of the neck of a bottle with overpressure, so that a release of pressure is achieved and a burst of pressure is prevented. the bottle Out of the notch, this elevation can not be carried out and since the seal material is of incompressible volume, these areas of the seal form a stop for the closure, which is of special importance with a screwed closure. This results in compression forces defined in the area of the seal, in which the recess is located. This is precisely defined the pressure with which the seal is raised in the area of the neck of the bottle neck and in fact is dependent on the magnitude of the screwing force. The movements of the area of the base of the closure in the form of a lid by bulging as a consequence of the pressure increases are not used in this closure. To improve the effect of the seal stop on this known closure, its seal has an annular area in which seal compression can not occur. This annular area is naturally in the area of the front end of the neck of a bottle. Since this radial area is very small, in practice there are difficulties in determining that the annular area rests on the neck of the bottle. Due to this annular stop area, the area is still very small in which the seal can rest and rise with overpressure. Therefore, sealing problems occur in practice. The object of the present invention is to achieve a closure of the type mentioned in the general concept of the claim, in which the disadvantages of the known closures are reduced, and also the sealing effect in large tolerances of the width of the front end is especially increased. of the neck of a bottle and its radial position. The object of the present invention is solved by the features of the claims. The main concept of this teaching consists in providing in the seal a portion of oblique, essentially conical sealing surface, in which at least it forms a part of the sealing surface and has an effect on the centering and improvement of the seal. This is achieved, since the oblique surface is placed on the outer edge of the front edge of the neck of a bottle and there is carried out a greater surface pressure. This compression is reduced or increased when the base of the closing portion with overpressure arches outward, thereby achieving an effect of an overpressure valve.

It is also convenient, when the sealing surface portion extends through the outer limit of the front surface of the neck of a bottle, whereby, through the sizing of the radial surplus, the release pressure is influenced. The inclination of the sealing surface portion is purposely selected, so that its movement from the neck edge of a bottle returns from the bowing of the base of the lid-shaped closure portion, so that it is larger with the increase in pressure. Through the measurement of the slope, pressure can also be influenced conveniently, where, when exceeding it, the sealing effect is reduced or disappears completely and the overpressure purge is presented. The radial dilation of the sealing surface portion extends at least suitably over the tolerance range of the radial external boundary of the front surface of the neck of a bottle. This ensures the function of the inclined sealing surface portion in all radial measures that may arise from the outer limit of the front surface of the bottlenecks with the bottles to be closed with the closure. The sealing surface portion and the projection are conveniently provided in a seal included in the base of the lid-shaped closure portion. The material of this seal can be selected independently of the closure in the form of a lid and thus adapt to the sealing conditions. In the use of such a seal, it is convenient that it has at least one notch in the part facing towards the base, which extends from a radial area inside the front surface of the neck of a bottle radially outwards. . Here it is convenient that the notch extends to the outer surface of the projection. In the area of the recess the seal is flexible so that under overpressure it softens and supports the purge process under overpressure. Through the following drawings, the invention is clarified by means of an example. Figure 1 is a middle radial section through the embodiment of the example of the invention, Figure 2 is a top view of the seal, according to Figure 1. The closure shown in section and to the middle of Figure 1 shows a portion of closure 1 in the form of a lid, whose edge 2 is only partially illustrated and in the portion not illustrated has an inwardly directed projection, for example a crush of a crown plug or a cord of a metal or plastic screw fastener, to hang on to a projection directed outward into the neck of a bottle. Opposite the base 3 of the closure portion 1 is a seal 4 having a sealing surface 5 to be placed on the front edge of the neck of a bottle. The seal 4 has along the outer edge a projection opposite the base 3 of the closure portion 1, which in the bolted condition surrounds the outer edge of the neck of a bottle. The projection 6 has a small appendage 7, which engages in a complementary nut on the inside of the edge 2 of the closing portion 1, so that the seal 4 is joined to the closing portion 1 so as not to be You can lose. The sealing surface 5 has a sealing surface portion 8 on a radial inner surface of the projection 6. It runs from the projection 6, inclining inwards. This oblique, that is to say conical, portion of the sealing surface 8 of the projection 6 rests in the condition firmly screwed on the outer edge of the front surface of the neck of a bottle and thus achieves a good seal. As the pressure in the bottle increases, the base 3 arcs outwardly so that the edge 2 moves in the area of the sealing surface portion 8 upwards and outwards, approximately in a vertical direction to itself from the edge front of the bottle and thus this sealing effect is reduced or increased, so that it can be softened with overpressure. The measurement of the inclination of the sealing surface portion 8 also matches the pressure of the opening of the overpressure valve provided through the closure. On the opposite side to the sealing surface 5 and the oblique sealing surface portion 8 and turned towards the base 3 of the closing portion 1, the seal 4 has narrow and radial channels 9. In the area of these channels 9, the seal 4 can be diverted towards the base 3 of the closure portion 1, when a sufficiently high pressure is produced in the corresponding bottle. Thus, an overpressure valve, which can be dimensioned in such a way that the bursting of a bottle is reduced, is provided. In the example of the embodiment shown, the channels 9 extend to the external surface of the projection 6, so that the material can also deviate from the projection 6, and in fact essentially radially outward, when a corresponding high pressure is produced. . Figure 2 shows only a portion of the seal according to Figure 1, and in fact in the drawing of Figure 1, from above, that is, from the base 3 of the closure portion 1. In this way they can be clearly observed the dimension and the route of the channels.

Claims

1. A closure for bottles or the like, with a closure portion in the form of a lid, with an inwardly directed projection for hanging to an outwardly directed projection on the neck of a bottle or the like and in the area of the front edge of the neck of the bottle. The bottle is provided inside the closure with a sealing surface to be placed on the front face of a bottle neck, characterized in that the sealing area has a sealing area portion, formed on the radial inner end of an axially opposite projection. the base of the closure portion that surrounds the external part of the neck of a bottle and that runs inclining in a radial direction and against the direction of screwing in the axial direction.

2. The closure according to claim 1, characterized in that the inclination of the sealing surface portion is selected in such a way that its movement, from the neck edge of a bottle, is greater with the increase in pressure and arcing of the bottle. the base of the closing portion in the form of a lid.

3. The closure according to claim 1 or 2, characterized in that the inclination of the sealing surface portion is dimensioned in dependence on the opening pressure, such that with a lower slope the opening pressure is lower and with a slope higher, the opening pressure is higher.

4. The closure according to claim 1 or 2, characterized in that the sealing surface portion extends along the outer limit of the frontal area of the neck of a bottle, whereby the radial surplus is dimensioned in dependence on the pressure of desired discharge, in such a way that with a reduced surplus the pressure of the opening is reduced and with a greater surplus, the opening pressure is greater.

5. The closure according to claim 1 or 2, characterized in that the radial dilation of the inclined sealing surface portion extends at least through the tolerance range of the external radial limit of the front area of the neck of a bottle.

6. The closure according to claim 1, characterized in that the sealing surface portion and the projection are provided in a seal at the base of the closure portion in the form of a lid.

7. The closure according to claim 6, characterized in that the seal has on its part turned toward the base at least one recess which extends from an inner radial area of the front surface of the neck of a bottle radially outward.

8. The closure in accordance with the claim 7, characterized in that the recess extends in the outer surface of the projection.