DE3017839A1 - Cylindrical bottle-sealing cap - has skirt divided by axial slots into segments with internal protrusions - Google Patents

Abstract

The sealing cap is particularly for bottles, having a cylindrical skirt fitting round the bottle neck, while its crown forms a seal against the edge of the latter. The skirt is divided into segments (5) by a number of axial slots (4) open to the underside, each with a protrusion (6) extending radially inwards. The latter has a bottom chamfer (8) so as to deflect the segment outwards on fitting the cap, and a top one (7) engaging below a mating face or shoulder on the bottle neck. A locking ring (3) can be thrust over the cap in the axial direction, working against an outer bead or thickened portion on the skirt.

Description

Closure cap for bottles

The invention relates to a closure cap for bottles according to the Preamble of claim 1.

Such bottle closures have so far been designed as screw caps, which can be screwed with an internal thread on an external thread on the bottle neck are. When applying or rolling this closure onto the neck of the bottle by machine the lower edge of the cap is pressed under a bead on the bottle neck, above which a circumferential perforation line is punched on the closure, along which the lower edge of the closure tears off when it is unscrewed for the first time (Pilverprof lock).

With this closure it would be criticized that the first application, in which in the initially smooth peripheral wall of the shutter the thread provided on the bottle neck is embossed or rolled in, relatively awkward and difficult. This closure can only be used once in in the sense that in domestic use it can be used several times on the same bottle can be unscrewed until it has been completely emptied, but it is not again afterwards Can be used together with another bottle, but what about the future replacement of Raw materials and energy would be very welcome. In addition to the metal cap a sealing plate made of Eullststoff and / or cork required, but what Makes difficulties with a later recovery of the raw material.

All other known closures also meet these requirements in particular both requirements, namely reusability and easy attachment, do not. The well-known crown cork capsules can only be placed on a corresponding bead once be crimped on the bottle neck, after opening the bottle the closure is not more tightly closable. The well-known beer bottle closure is being used on a large scale with hold-up bar, ceramic head and rubber gasket, which is well known can be used many times together with the beer bottle, but relatively expensive and cumbersome is in the handling.

In contrast, the invention is based on the object of a closure cap of the type mentioned above, which can be reused as often as required securely closes and can withstand the highest internal pressures, which is relatively easy is designed and manufactured in one piece, safely automatically handled, that is can be applied by machine to the bottle neck without damaging stress the bottles or others Containers or the closure cap itself.

The solution to this problem is given in claim 1.

After that, the peripheral part of the closure cap is a part, practically for the greater part of its length perforated by axially parallel slots; as a result, movable ones form at their free end, through the head and a part the length of the cap interconnected segments, depending on its inside have an inwardly directed projection, which in the closed position a protruding collar engages behind on the outside of the bottle neck. Thanks one Each segment is raised on the lower / inner edge when it is placed on the Bottle neck bent or spread open radially outwards; a slope at the top The edge of the projection then engages behind the collar of the bottle neck at the end of the overtravel path.

The functional reliability, especially the tightness against overpressure in the bottle is significantly increased by a ring that extends axially over the peripheral part the closure cap is pushed over and thereby pushes the segments radially inward.

The same locking effect, so the radial inward spreading of the Segments can also be achieved by turning the locking ring. Here For example, an inward protrusion of the ring works, which is provided with bevels on both sides in the circumferential direction and on his highest point has a notch, with Je a knob or corrugated bump formed on each of the segments. the The arrangement can also be reversed by adding the bevels and locking notches to the Segments and the knobs are provided on the ring. There can also be a locking movement be combined with one another in the axial and then in the circumferential direction, like a Bayonet lock.

Preferably, this ring is integral with the cap in the the rest formed, in particular made by injection molding.

Further refinements are given in the subclaims.

Two exemplary embodiments are described below with reference to the drawing described, with the features of the subclaims in more detail explained will.

Fig. 1 shows a first embodiment in an oblique view.

Fig. 2 shows the closure cap according to Fig. 1 in axial section; Fig. 3 shows the closure cap according to Fig. 1 or 2, also in an axial section pushed over a bottle neck; Fig. 4 shows again in perspective, at an angle from above the closure cap according to FIGS. 1 to 3, in the closed position, on a bottle neck; Fig. 5 also shows in perspective, in an oblique view, the closure according to Fig. 4, lifted from the bottle neck.

6 and 7 show a modified embodiment, namely Fig. 6 is an oblique view from above, Fig. 7 is a horizontal section along the line VII -VII: in Fig. 6.

The essentially cylindrical closure cap in its basic shape 1 has at its upper end a cover or base 2, which in a known manner has a bulge so that a circumferential groove is formed is sealing on the correspondingly shaped opening edge of the bottle neck 13 rests.

According to the invention, the peripheral part of the closure cap is through axial Slots 4 are divided into individual segments 5, that is to say only over the upper area of the peripheral part or via the bottom 2 are connected to one another. In the example six axial slots and, accordingly, six segments 5 are provided each Segment 5 has an inwardly directed projection 6, on the lower At the end of a radially inward / upward rising run-up bevel 8 and at its upper one End an oppositely inclined slope 7 are provided. When putting on the Closure cap on a bottle neck is therefore the segments 5 thanks to the bevels 8 spread outwards (val. Fig. 5). In the closed position reach under Slopes 7 a circumferential inclined surface or shoulder 7a, which is formed on the bottle neck is. The distance between the shoulder 7a and the opening edge of the bottle neck corresponds to so the distance of the slope 7 from the bottom 2 of the closure cap.

By a pushed over ring 3, the segments 5 are radially pressed on the inside and held in the engaged position (see. Fig. 3, dashed lines and Fig. 4). As shown in FIGS. 1, 2, 3, the ring 3 is made in one piece with the closure cap otherwise manufactured, in particular from plastic by injection molding. Of the concentrically arranged ring 3 is initially by means of webs 11 (or a single, circumferential web) connected to the cap. These webs 11 are known They represent predetermined breaking points when the cap is put on for the first time.

The ring 3 works with two circumferential beads 9, 10 on the outer circumference the peripheral part or the segments 5 together.

The lower bead forms a stop bead 9 that controls the displacement of the ring 3 limited downwards, the upper bead acts as an index bead 10. The index bead 10 is above and the stop bead 9 below the slope 7. The axial spacing of the beads 9, 10 from one another corresponds to the axial height of the ring 3. The edges of the ring are rounded.

The embodiment according to FIGS. 6 and 7 corresponds to the example 1 to 5, similar parts are provided with the same reference numerals. In contrast to the previous example, as shown in FIGS. 6 and 7, the slots 4 between the individual segments 5, however, each by a relatively thin, semi-cylindrical Wall part 14 bridged.

The slots 4 are therefore covered by these wall parts 14. By these wall parts 14, the restoring force of the segments 15 is increased, the segments 15 So engage behind the inclined surface 7a on the bottle neck with greater pressure. However is preferably also this cap together with a pushable Ring 3a used, this ring 3a having the wall parts on its inner circumference 14 has corresponding recesses 15.

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Claims (8)

Closure cap for bottles Patent claims 1. Closure cap in particular for bottles whose essentially cylindrical peripheral part extends into the outer periphery of a bottle neck engages and the bottom of which seals on the edge of the opening of the bottle neck rests, characterized in that the peripheral part by several below open, axial slots (4) is divided into segments (5), each one have radially inwardly pointing projection (6) with a lower run-up bevel (8) for spreading the segment when it is placed on the bottle neck and with a upper bevel (7) for reaching behind / under an opposing inclined surface or Shoulder (7a) is provided on the bottle neck (13). 2. Closure cap according to claim 1, characterized by an axially over the peripheral part of the cap slidable ring (3), which with its inner circumference in its lower displacement position with at least one radially outer projection or bead or a thickening on the peripheral part cooperates. 3. Closure cap according to claim 2, characterized in that in a height distance from one another corresponding to the axial height of the ring (3) Index bead (10) and a stop bead (9) on the outer circumference of the peripheral part each Segments are provided, between which in the closed position the ring (2) comes to rest. 4. Closure cap according to claim 1, characterized by ei Qnin the circumferential direction relative to the closure cap displaceable ring, the knobs on its inner circumference or has inclined surfaces with respect to the circumferential direction, each with a sloping surface inclined with respect to the circumferential surface or a nub on each of the segments (5) work together. 5. Closure cap according to claim 4, characterized in that each two oppositely inclined run-up bevels are provided between each with a notch is provided. 60 Closure according to at least one of Claims 1 to 5, characterized characterized in that between every two adjacent segments (5) one convex after outwardly facing, essentially semi-cylindrical wall part (14) is provided is. 7. Closure according to claim 6, characterized in that the ring (3a) recesses on its inside (15> to accommodate the wall parts (14) having. 8. Closure according to at least one of claims 2 to 7, characterized by webs (11) or a circumferential wall part, by means of which the ring is made in one piece can be injected with the closure made of plastic, and the first time it is actuated Represent predetermined breaking points.