AT516972B1 - Bottle with a cap - Google Patents

Abstract

A bottle (1) having a bottle body (2) made of light metal and a provided with an external thread (4) neck (3), wherein the bottle (1) has a sleeve-shaped cap (5) with an opening of the bottle (1) closing lid (6) and a jacket (7) which adjoins the cover (6) and has a thread (8) corresponding to the external thread (4) of the neck (3), the edge (9) of the neck (3) of the bottle ( 1) is formed by a bent portion (10) of the neck (3) forming a bead around an opening of the bottle (1), a free end of the bent portion (10) being directed towards an outer or inner surface of the bottle ( 1) and the bent portion (10) in the region of a cover facing the top (11) of the edge (9) is curved and the edge (9) of the bottle (1) has a substantially O-shaped cross section, wherein a Inside of the lateral surface (7) of the closure (5) is coated with a paint, wherein a coefficient of static friction between the paint and aluminum is smaller than a coefficient of static friction between aluminum and aluminum, wherein an outer side of the cap (5) is painted with a matt paint, wherein a static friction coefficient between human skin and The matt finish is greater than a static coefficient of friction between aluminum and human skin.

Description

Patent Office

Description: The invention relates to a bottle with a bottle body made of light metal and a neck provided with an external thread, the bottle having a sleeve-shaped cap with a lid closing an opening of the bottle and a cap adjoining the lid and one with the external thread of the neck in a closed state of the bottle has a corresponding thread surface, wherein the edge of the neck of the bottle is formed by a bent portion of the neck forming a bead surrounding an opening of the bottle body, a free end of the bent portion toward an outer or The inner surface of the bottle has and the bent portion is curved in the region of an apex of the edge facing the lid and the edge of the neck of the bottle has an essentially O-shaped cross section.

Bottles of the type mentioned are often used as disposable bottles for beverages, especially carbonated beverages. High quality carbonated drinks can also be pasteurized after filling and closing the bottles. Due to the high temperatures and the carbon dioxide contained in the drinks, this can lead to a very high internal pressure, for example 5-6 bar, in the bottle, which can result in an unwanted escape of carbon dioxide in the area of the cap, since high internal pressure can lead to an insufficient seal in the area of a closure of the bottle. However, the reduction in carbon dioxide represents an undesirable reduction in the quality of the beverage.

To increase the tightness, it has become known from DE 3722603 C1 to arrange a plastic sealing layer on an inside of a closure that is in contact with the bottle neck.

A bottle of the type mentioned is known from US 5822842 A. A disadvantage of the known solution, however, is that the bottle is very difficult to open at very high internal pressures.

It is therefore an object of the invention to ensure a very good tightness of the bottle even at a very high internal pressure in the bottle and to prevent escape of carbon dioxide and to allow easy opening of the bottle.

This object is achieved with a bottle of the type mentioned according to the invention in that an inside of the outer surface of the cap is painted with a varnish, with a coefficient of static friction between the varnish and aluminum being smaller than a coefficient of static friction between aluminum and aluminum, wherein an outside of the sealing cap is coated with a matt lacquer, a coefficient of static friction between human skin and the matt lacquer being greater than a coefficient of static friction between aluminum and human skin.

The solution according to the invention ensures an optimal and tight fit of the edge on the groove, so that even with a high internal pressure in the bottle, as can occur during pasteurization, the seal is highly sealed. Furthermore, the invention enables the bottle to be opened easily even at high internal pressures.

Due to the O-shaped cross section of the edge, the bent portion is largely closed. That is, a free end of the bent portion either abuts the outer surface of the bottle or a gap between the free end of the bent portion and the outer surface of the bottle is very small and is not more than 0.5 mm.

[0009] The closure cap particularly preferably has a base body made of a light metal. This embodiment is characterized in particular by the fact that the thread on the closure cap can be produced by means of one or more rollers

1/11

AT516 972 B1 2019-02-15 Austrian

Patent office before embossing the external thread of the neck of the bottle into a blank of the cap by rolling it off.

According to an advantageous variant of the invention, which in addition to a low weight also enables very thin wall thicknesses, it can be provided that the base body of the bottle and / or the base body of the closure cap are formed from aluminum or an aluminum alloy.

The base body of the bottle can have a wall thickness in a region between the neck and a bottom of the bottle, which is less than or equal to 0.5 mm.

It has turned out to be particularly advantageous if the closure cap is closed except for an opening for receiving the neck of the bottle, the outer surface of the closure cap comprising a spaced apart rib in a section located between the thread of the outer surface and the lid Has corrugation, the corrugation having a depth of at least 0.1 mm. The depth of the corrugation makes opening the bottle much easier.

In a very advantageous variant of the invention it can be provided that the closure cap has a tear-off ring which is connected via webs to the surface of the thread and the neck of the bottle is a first adjoining the external thread and on the outside of the bottle has a bearing surface for a section of the tear-off ring, the first bearing surface merging into a second bearing surface inclined to the first bearing surface and also located on the outside of the bottle, the second bearing surface viewed from the first bearing surface in the direction of a bottom of the bottle in Is inclined in the direction of a longitudinal center plane of the bottle, an angle which is included between the first bearing surface and a section of a tangential plane facing the first bearing surface facing the second bearing surface is a maximum of 45 °.

By an angle of at least 45 ° in the area of the tear-off ring, the mechanical strength of the bottle is significantly increased compared to conventional bottles, so that the bottle is not damaged even by high pressures occurring during pasteurization inside the bottle.

A simple opening of the bottle with high tightness of the closure can be achieved in that the external thread is a single thread and a value for a depth of the external thread lies in a range of values, the lower limit of 0.5 mm and the upper limit Is 0.9 mm and a value for a nominal diameter of the external thread is in a range of values whose lower limit is 25 mm and whose upper limit is 30 mm and a value for the height of the thread is in a range of values whose lower limit is 9 mm and its upper limit Limit is 15 mm, with a number of threads of the external thread being at least two, in particular between two and three. The high depth of the thread ensures a good seal of the bottle, while its relatively flat shape allows the cap to be twisted with little effort.

A small amount of force for twisting the closure cap can be achieved in that the external thread is a round thread, a value for a radius of curvature of a thread flank coming from a range of values between 0.4 and 0.8 mm.

The effort required to open the bottle can be reduced even further that at least the external thread is coated with a varnish, with a coefficient of static friction between the varnish and aluminum being smaller than a coefficient of static friction between aluminum and aluminum.

According to a preferred embodiment it can be provided that the lid of the closure cap has a sealing insert. The sealing insert, which can preferably be made of plastic and, for example, can be injected into the closure cap

2/11

AT516 972 B1 2019-02-15 Austrian

Patent office further increased the tightness of the bottle.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

[0020] Each shows in a highly simplified, schematic representation:

[0021] FIG. 1 shows a section through a bottle according to the invention with the closure cap removed;

Fig. 2 is a perspective view of a cap for the bottle of Fig. 1;

3 shows a perspective view of a closure cap in a raw state;

Fig. 4 shows a contour of a neck of the bottle from Fig. 1 in more detail.

In the introduction, it should be noted that in the differently described embodiments, the same parts are provided with the same reference numerals or the same component names, and the disclosures contained in the entire description can be applied analogously to the same parts with the same reference numerals or the same component names. The location information selected in the description, e.g. above, below, to the side, etc., referring to the figure described and illustrated immediately, and if the position is changed, these are to be applied accordingly to the new position.

All information on ranges of values in the present description should be understood to include any and all subranges therefrom, e.g. the information 1 to 10 is to be understood so that all sub-areas, starting from the lower limit 1 and the upper limit 10, are included, i.e. all sub-areas begin with a lower limit of 1 or greater and end with an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

At this point it should be pointed out that the figures are described in the following.

1, a bottle 1 according to the invention has a bottle body 2, which is made of light metal, in particular aluminum or an aluminum alloy. On its outside and / or inside, the bottle base body 2 can be completely or partially coated, for example painted. The bottle body 2 further has a neck 3 on which there is an external thread 4.

The external thread 4 is preferably a single-start thread. A depth of the external thread 4 is advantageously between 0.5 mm and 0.9 mm. A nominal diameter of the external thread can be, for example, between 25 mm and 30 mm. According to the illustrated embodiment, the thread can have a height between the limit of 9 mm and 15 mm. A number of threads of the external thread 4 is at least two, in particular between two and three.

The number of threads of the external thread 4 particularly preferably comes from a range of 2.2-2.5. The external thread 4 can be designed as a round thread, a radius of curvature of a thread flank advantageously being between 0.4 and 0.8 mm.

The external thread 4 can be coated with a friction-minimizing lacquer, a coefficient of static friction between the lacquer and aluminum being smaller than a coefficient of static friction between aluminum and aluminum.

The bottle 1 also includes a sleeve-shaped cap 5 shown in Figures 2 and 3 in detail. The cap 5 has a lid 6 and a lateral surface 7, into which a thread 8 corresponding to the external thread 4 is embossed, so that the cap 5 can be released from the neck 3 by twisting and closed again by screwing. 3 shows the closure cap 5 in a raw state. The closure cap 5 shown in FIG. 3 is placed on the bottle 1 to close the bottle 1 after it has been filled, the jacket surface 7 being above the outside

3.11

AT516 972 B1 2019-02-15 Austrian

Patent Office thread 4 of the neck 3 of the bottle comes to rest. Then, by means of tools not shown here, for example by means of rollers, the contour of the external thread 4 is stamped into the lateral surface 7 in a manner known per se. As a result, the cap 5 is connected to the bottle 1. Subsequently, the bottle 1 can be opened again by turning the closure cap 5.

To minimize friction, an inside of the outer surface 7 of the sealing cap 5 is coated with a lacquer, a coefficient of static friction between the lacquer and aluminum being less than a coefficient of static friction between aluminum and aluminum. The above-mentioned lacquer can have, for example, at least 1-2 parts by weight of a wax and / or other friction-reducing additives, for example graphite particles.

Of course, both the inside of the cap 5 and the external thread 4 can be painted. In this case it is advantageous if a coefficient of static friction between the two lacquers is lower than a coefficient of static friction between aluminum and aluminum.

To improve handling and to facilitate opening of the bottle 1, an outside of the closure cap 5 is also to be coated with a lacquer, a coefficient of static friction between human skin and the matt lacquer being greater than a coefficient of static friction between aluminum and human skin. A so-called “soft-touch lacquer”, for example, can be used as the lacquer for the outside of the closure cap 5.

The paint used to paint the outside of the closure cap can have friction-increasing additives, for example rubber particles.

At this point it should be noted that the specification of static friction coefficients in this document in relation to a static friction coefficient between aluminum and aluminum is to be understood as a general reference in the sense of a quantitative value, which is independent of whether as material for the bottle 1 or the cap 5 another light metal is used. In other words, in the present context, a coefficient of static friction between aluminum and aluminum means a value of 1.05.

The cap 5 may be closed except for an opening for receiving the neck 3 of the bottle 1. A corrugation 16 comprising spaced-apart ribs can be arranged in a section located between the thread 8 of the lateral surface 7 and the cover 6. The corrugation 16 has a depth of at least 0.1 mm.

As can be seen from FIG. 3, the cover 6 can have a groove 18 with a U-shaped cross section. The groove 18 can run along a self-contained curve, in particular along a circle, and can be located, for example, in a sealing insert 16, which can be made of plastic and injected, for example, into the closure cap 5. However, the groove 18 is not required, for example the groove 18 could also be dispensed with and the sealing insert 16 could also be designed entirely without a groove 18.

The edge 9 of the neck 3 of the bottle 1 is formed by a bent section 10 of the neck 3, which has the shape of a bead surrounding an opening of the bottle body 2. As can be seen from the illustration in FIG. 1, the rim 9 of the bottle 1 can have an essentially O-shaped cross section. A free end of the bent section 10 can point in the direction of an outer surface of the bottle 1. In principle, however, it is also possible for the edge 9 to be bent inwards. In this case, the free end of the bent portion 10 would face an inner surface of the bottle 1. In the region of an apex 11 facing the cover 6, the edge 9 is curved.

As can be seen from FIG. 3, the closure cap 5 can have a tear-off ring 12 which is connected via webs 19 to the lateral surface 7. At the same time, the neck 3 of the bottle 1, as shown in FIGS. 1 and 4, can be a first connecting to the external thread 4 and

4.11

AT516 972 B1 2019-02-15 Austrian

Patent office located on the outside of the bottle 1 support surface 13 for a portion of the tear-off ring 12. The first support surface 13 merges into a second support surface 14, which is also arranged on the outside of the bottle 1. The second contact surface 14 is inclined with respect to the first contact surface 13. When viewed from the direction of the first support surface 13, the second support surface 14 is inclined in the direction of a longitudinal center plane e of the bottle 1. As can be seen from FIG. 4, an angle a, which is included between the first support surface 13 and a section of a tangential plane t facing the first support surface 13 to the second support surface 14, is a maximum of 45 °.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure of the bottle according to the invention, these or their components have been partially shown to scale and / or enlarged and / or reduced.

5/11

AT516 972 B1 2019-02-15 Austrian

Patent Office

LIST OF REFERENCE NUMBERS

bottle

bottle body

neck

external thread

cap

cover

lateral surface

thread

edge

section

vertex

demolition ring

bearing surface

bearing surface

sealing insert

knurl

Stege

Groove e longitudinal median plane t tangential plane α angle

6/11

Claims (10)

claims 1. Bottle (1) with a bottle body (2) made of light metal and a neck (3) provided with an external thread (4), the bottle (1) having a sleeve-shaped cap (5) with an opening of the bottle (1) closing it Lid (6) and a jacket surface (7) which adjoins the lid (6) and has a thread (8) corresponding to the external thread (4) of the neck (3) when the bottle is closed, the edge (9) of the neck (3) of the bottle (1) is formed by a bent section (10) of the neck (3) forming a bead surrounding an opening of the bottle body (2), with a free end of the bent section (10) in the direction has an outer or inner surface of the bottle (1) and the bent section (10) is curved in the region of a vertex (11) of the edge (9) facing the lid (6) and the edge (9) of the neck (3) the bottle (1) a substantially O-shaped n has a cross section, characterized in that an inside of the outer surface (7) of the closure cap (5) is coated with a lacquer, a coefficient of static friction between the lacquer and aluminum being smaller than a coefficient of static friction between aluminum and aluminum, with an outside of the closure cap (5) is coated with a matt lacquer, a coefficient of static friction between human skin and the matt lacquer being greater than a coefficient of static friction between aluminum and human skin. 2. Bottle according to claim 1, characterized in that the closure cap (5) has a base body (12) made of a light metal. 3. Bottle according to claim 2, characterized in that the bottle base body (2) and / or the base body (12) of the closure cap (5) are formed from aluminum or an aluminum alloy. 4. Bottle according to one of claims 1 to 3, characterized in that the closure cap (5) is closed except for an opening for receiving the neck (3) of the bottle (1), the outer surface (7) of the closure cap (5 ) in a section located between the thread (8) of the lateral surface (7) and the cover (6) has a corrugation (16) comprising spaced ribs, the corrugation having a depth of at least 0.1 mm. 5. Bottle according to one of claims 1 to 4, characterized in that the closure cap (5) has a tear-off ring (12) which is connected via webs (19) to the outer surface (7) having the thread (8) and the neck (3) of the bottle (1) has a first contact surface (13) for a section of the tear-off ring (12), which adjoins the external thread (4) and is located on the outside of the bottle (1), the first contact surface (13) in one second bearing surface (14) which is inclined to the first bearing surface (13) and is also located on the outside of the bottle, the second bearing surface viewed from the first bearing surface (13) towards a bottom of the bottle (1) towards a longitudinal median plane (e) the bottle (1) is inclined, an angle (a) being scanned between the first bearing surface (13) and a section of a tangential plane (t) facing the first bearing surface (13) to the second bearing surface (14) is closed, is a maximum of 45 °. 6. Bottle according to one of claims 1 to 5, characterized in that the external thread (4) is a single thread and a value for a depth of the external thread (4) lies in a range of values, the lower limit of 0.5 mm and the upper limit Limit is 0.9 mm and a value for a nominal diameter of the external thread (4) is in a range of values whose lower limit is 25 mm and whose upper limit is 30 mm and a value for the height of the thread is in a range of values whose lower limit is 9 mm and its upper limit is 15 mm, a number of threads of the external thread (4) being at least two, in particular between two and three. 7/11 AT516 972 B1 2019-02-15 Austrian Patent Office 7. Bottle according to one of claims 1 to 6, characterized in that the external thread (4) is a round thread, wherein a value for a radius of curvature of a thread flank comes from a range of values between 0.4 and 0.8 mm. 8. Bottle according to one of claims 1 to 7, characterized in that at least the external thread (4) is coated with a lacquer, a coefficient of static friction between the lacquer and aluminum being smaller than a coefficient of static friction between aluminum and aluminum. 9. Bottle according to one of claims 1 to 8, characterized in that the lid (6) of the closure cap (5) has a sealing insert (15). 10. Bottle according to claim 9, characterized in that the sealing insert (15) is made of plastic.