SK44499A3 - Screw-type cap with safety and guarantee band - Google Patents

Abstract

A safety band (3) of a sealing unit (1) has two retaining noses (12a, 12b; 13a, 13b) arranged in diagonally facing pairs. The retaining noses (12a, 12b; 13a, 13b) standing out on the clear opening of the safety band (3) are axially displaced. When the bottle (17) is closed, the pair of retaining noses (12a, 12b) is first split and then glides on the retaining rib (15). After that the retaining noses (13a, 13b) that are displaced 90 DEG are split and also glide beneath the retaining rib (15). When the bottle is opened the retaining noses (13a, 13b) are first retained on the retaining rib (15) and the connecting webs (9) to the screw-type cap (2) are broken. Afterwards, the remaining webs (9) are also broken once the axially offset retaining noses (12a, 12b) are obstructed by the retaining rib (15).

Description

Security and protective strips are now part of most screw caps to mark the initial opening of the bottle and protect its contents from being destroyed by incompetent persons. The security strips consist of a cylindrical casing part connected to the lower edge of the screw cap casing by means of connecting tissues. The strips may include fragile areas on their circumferences that tear upon first opening. The stripe areas remain connected to the screw cap. They can be manufactured in one piece and remain after the first opening under the gripping plastic strip, located axially below the thread on the neck of the bottle. Along with conventional safety and protective strips, which are distributed either at the lower edge or on the inner surface of the perimeter and extended into the final cross-section, a plurality of cam slips are also provided along the perimeter. As the bottle cap is rotated, these catch chutes slide along the plastic strips and lock under them. When opening the screw cap, the security strip is caught by a catch slip, which additionally comprises a gripping surface and connecting tissues, between the screw cap and the gap of the protective strip. When rotating or placing the cap of the safety cap on the bottle, problems may arise due to the resistance that occurs when the grip plastic strip passes through the slip and the protective strip, if made obliquely, may be compressed or snapped between the bottle neck and the screw cap housing. The security strip or fasteners of the closure may also tear upon closure. A security strip with such a feature loses its purpose. In a high-volume bottling plant, a defect of this type may result in the entire plant being stopped.

However, also when opening the lid, the known security strips often tear only on one side or are partially pushed away from the gripping plastic strip. On re-closing, the security strip snaps between the bottle neck and the screw cap package, so that the hermetic seal is not possible unless the security strip has been previously pulled by hand or pushed backwards.

12294SP1

BACKGROUND OF THE INVENTION

The purpose of the present invention is to provide a safety strip that can be placed on the bottle without problems in the case of high-volume bottling devices and which perfectly separates from the screw closure while opening the bottle while remaining behind under the grip plastic strip on the closure neck; in the case of return bottles tears and remains attached to the screw cap.

This purpose is achieved by a safety and security strip according to the features described in claim 1. First

SUMMARY OF THE INVENTION

The retaining chutes arranged axially, displaced on the closure act considerably lower, breaking down the pressures on the safety strip and preventing its premature deterioration.

The two catch chutes, which are arranged in pairs and axially positioned one on the other, rotate the screw cap in the same way one after the other after the grip plastic strip, which makes the safety strip difficult to tension due to oval deformation and a slight axial pressure is required the passage of the catch chute was allowed. When opening the bottle, the two above-mentioned retaining chutes are held by the retaining plastic strips initially at the rear, and here only the tensile pressures, preferably formed transversely to the retaining plastic strips, which tear therethrough, occur on the connecting tissues. Once the first tie tissues have been ruptured, adjacent catch slips reach the catch plastic strips and tear through adjacent tie tissues. In this way, the security strip is prevented from being inclined and, when formed in one piece, always remains at the back below the plastic retaining strip on the neck of the bottle. The security strip with a predefined break position and connection to the screw cap remains connected to the latter.

Overview of the figures in the drawing

The invention is hereinafter described by way of example. FIG. 1, which shows a cross-section through the screw cap s

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12294SP1 safety and protective strip as well as the neck of the plastic bottle located at the bottom. Fig. 2 shows a cross-section along the line II-II, between the lower edge of the screw cap package and the upper edge of the security strip. In FIG. 3 shows a cross-section along the line II-II, through the security strip in FIG. 1, during the screwing process itself. Fig. 4 shows a perspective view of a closure unit in accordance with FIG. 1-3. Fig. 5 illustrates a cross-section along the line III-Π, between the lower edge of the screw cap package and the upper edge of the security strip in FIG. 6; FIG. 6 is a perspective view of another embodiment of the invention with a bonded security strip.

Examples of a particular embodiment of the invention

Fig. 1 and 2, with reference to the number i, schematically illustrate a closure unit consisting of a screw closure 2 and a security strip 3. The closure unit consists of a thermoplastic and is made by injection molding. The screw closure 2 comprises a base 4 on which a sealing plastic strip 5 lying coaxially to the symmetry of the A axis can be mounted. The base 4 is supplied with a cover 6, which carries on its inner side, preferably in portions, distributive thread windings 7. 2 is generally known and is not described in detail herein. The security and protective strip 3 is connected to the lower edge 8 of the screw cap cover 6 by very thin tissues 9 of several tens of millimeters in thickness. The length of the connective tissues 9, or the distance between the upper edge 10 of the security strip, is very small and varies several tens of millimeters.

Two pairs of slip chutes 12a, 12b, 13a, 13b are formed on the inside of the security strip package 11 according to the illustrated example. The engagement chutes 12a, and 12b as well as the engagement chutes 13a and 13b, which lie diagonally opposite, are spaced at an angle of approximately 90 ° and are axial, i.e. having regard to the axial extension of the security strip 3, distributed in a quantity and. As a result, the chutes 12a and 12b lie closer to the lower edge 14 of the security strip 3 than the chutes 13a and 13b in amounts a. Preferably, the distance a is less than the height b of the circumferential gripping plastic strips 15 on the neck 16 of the bottle 17, manufactured e.g. from PET. Threaded sections 18, protruding, are visible on the neck 16 of the bottle 17

12294SP1 outwardly from the neck of the bottle 16, it being contemplated that these will collide with the corresponding threaded sections 7 on the inside of the package 6 of the screw cap 2.

The tie fabrics 9 lie, retaining the circumferential direction, between the retaining plastic strips 12a, 12b; 13a, 13b. As an alternative to the tissues 9, the screw closure together with the security strip 3 can together hold e.g. connections from thin film.

The operation of the security strip 3 according to the first embodiment is subsequently explained by means of Figure 3.

When closing the bottle 17 with the closure unit 1, the latter is placed from the top axially on the neck of the bottle 16 and rotates clockwise when viewed from above. Thus, the threaded sections 7 on the screw cap 2 first come into contact with the threaded sections 18 on the neck of the bottle 16. Upon further rotation and by this axial displacement of the capping unit 1, the two grip chutes 12a and 12b are pressed radially outwards and simultaneously the chutes 13a and 13b are displaced at an angle of approximately 90 ° inward. Thus, it is assumed that the security strip 3 has an oval shape and stretches only extremely slightly, within its elasticity limit. As soon as the two tipping points S1 of the chutes 12a and 12b and the tipping point S2 of the gripping plastic strip 15 have slid one over the other, the two gripping chutes 12a and 12b are retracted radially inwards, since at this moment the two gripping chutes 13a and 13b are arranged radially. they are also displaced by the displacement with the gripping plastic strip 15 and, similarly to the other two plastic strips, are pushed radially outwards. In this way, the cross-section of the security strip 3 again takes an oval shape. After only a short time, two catch chutes 13a and 13b also slide over the catch plastic strip 15 and are subsequently located there, as well as two catch chutes 12a and 12b in the cylindrical region 20 of the bottle neck. When closing the bottle 16, the thin tie fabrics 9 are only very slightly mechanically loaded, because by means of axial pressure the security strip 3 with its upper edge 10 carried on the lower edge 8 of the package and the tie fabrics 9 is only compressed at the same time.

When opening the screw cap, the two opposing catch chutes 13a and 13b first come into contact with the grip plastic stripe 15 on the neck of the bottle 16. Since neither the gripping slips 13a and 13b nor the grip plastic strips 15 are connected and allow for pushing away two parts as in

Claims (7)

A screw cap for a bottle, with a security and protective strip, the annularly shaped security strip being attached to the screw cap packaging by the connective tissues on its inner surface and holding the gripping slides which are extended into a transverse region, characterized in that the chutes (13a, 13b) lying diagonally opposite each other and the at least one further chute (12a) displaced by 90 ° and axially displaced by the portion (a) are disposed on the security strip (3). Screw cap according to claim 1, characterized in that at least two pairs of slip chutes (12a, 12b; 13a, 13b) are arranged on the security strip (3), which lie diagonally opposite and are axially displaced towards each other. Screw cap according to claims 1 and 2, characterized in that the axial displacement (a) of the grip chutes (12a, 12b; 13a, 13b) is smaller than the height (b) of the gripping plastic strip (15) on the neck (16). Screw cap according to either of Claims 1 and 3, characterized in that the connecting tissues (9) mounted in the circumferential direction lie between the retaining chutes (12a, 12b; 13a, 13b). Screw cap according to either of Claims 1 and 4, characterized in that in each case two connecting tissues (9) lie between the grip chutes (12a, 12b; 13a, 13b). Screw cap according to either of Claims 1 and 5, characterized in that the security strip (3) consists of a fixed, unbreakable connection area (X) with the screw cap housing (6) and a predetermined breaking area (22). . Screw cap according to claim 6, characterized in that one of the grip chutes (12b) is arranged diagonally with respect to the connection area (X). 12294SP1 by screwing or closing, but the retaining plastic strip Γ5 does not move beyond the catch chute 13a and 13b, finally holding back and the tie fabrics 9 lying laterally on the catch chutes 13a and 13b tear into two parts. After further twisting, for example, a quarter or a half, the retaining chutes 12a and 12b become the support members of the retaining plastic strip 15. Due to the already torn connecting tissues 9, the security strip is deformed again oval and by such pulls the retaining chutes 12a, 12b . In this way, the remaining connecting tissues 9 also tear. The security strip 3 remains at this point in the region 20 below the plastic retaining strip 15. The flip-off screw cap 2 can now be screwed onto the neck of the bottle 16 without the security strip 3 having been torn off. 5 and 6, the security strip 3 in the region (X) is non-detachably connected to the cover 6 of the screw cap 2. The remaining peripheral region of the security strip is detachably connected to the lower edge 10 by thin bonding tissues 9. The thinner line 12a adjoins the predefined fracture area 22 below the connecting area X. Preferably, a single or double retaining chute 12b is formed directly opposite the joining area X. lying close to each other. Displaced by 90 ° to this region, there are two further catch chutes 13a and 13b. The gripping chutes 13a or 13b and 13b lie axially further away from the lower edge 14 of the security strip 3 and thus become supportive together with the gripping plastic strip T5 rather than the gripping chutes 12a and 12b. The tissues 9, laterally positioned to the chutes 13a and 13b, as well as the predefined fault area 22, are refracted rather than remaining.