EP3075675A1 - Bottle with closure 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 lid 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.

Description

The invention relates to a bottle with a bottle body made of light metal, wherein a neck of the bottle has an external thread, wherein the bottle has a sleeve-shaped cap with an opening of the bottle occlusive lid and a subsequent to the lid shell surface, wherein the lateral surface in the closed state of Bottle has a corresponding with the external thread of the neck thread.

Bottles of the type mentioned are often used as disposable bottles for drinks, especially carbonated drinks. High-quality carbonated drinks may also be subjected to pasteurization after filling and capping the bottles. This can lead to a very high internal pressure, for example 5-6 bar, in the bottle due to the high temperatures and the carbonic acid contained in the drinks, which may result in an unintentional escape of carbon dioxide in the region of the closure cap, since it is due to the high internal pressure can lead to an insufficient seal in the region of a closure of the bottle. However, the reduction in carbon dioxide content is an undesirable reduction in the quality of the beverage.

It is therefore an object of the invention, even with a very high internal pressure in the bottle to ensure a very good tightness of the bottle and to avoid the escape of carbon dioxide.

This object is achieved with a bottle of the type mentioned in the present invention, that the edge of the neck of the bottle is formed by a bent, forming around an opening-opening of the bottle body bead forming portion of the neck, wherein a free end of the bent portion in Direction of an outer or inner surface of the bottle has and the bent portion is formed curved in the region of the lid of the closure facing apex of the edge and the edge of the bottle has a substantially O-shaped cross-section.

The solution according to the invention ensures an optimal and tight abutment of the edge on the groove, so that even with a high internal pressure in the bottle, as can occur in a pasteurization, a high tightness of the closure is given.

Due to the O-shaped cross section of the edge of 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 not more than 0.5 mm.

Particularly preferably, the closure cap has a basic body made of a light metal. This embodiment is characterized in particular by the fact that the thread can be produced on the closure cap by means of one or more rollers which impress the external thread of the neck of the bottle into a blank of the closure cap by unrolling.

According to an advantageous variant of the invention, which allows not only a low weight but also very thin wall thicknesses, it can be provided that the bottle base body and / or the base body, the closure cap made of aluminum or an aluminum alloy are formed.

The body of the bottle may have a wall thickness in an area between the neck and a bottom of the bottle that is less than or equal to 0.5 mm.

In order to allow easy opening of the bottle, an inside of the lateral surface of the cap can be painted with a paint, wherein a coefficient of static friction between the paint and aluminum is smaller than a static coefficient of friction between aluminum and aluminum. The above-mentioned lacquer may, for example, have at least 1 to 2 parts by weight of a wax and / or other friction-reducing additives, for example graphite particles.

The opening process can be further simplified by the fact that an outer side of the cap is painted with a lacquer, wherein a coefficient of static friction between human skin and the matt lacquer is greater than a static coefficient of friction between Aluminum and human skin. The paint used for painting the outside of the cap may have friction-increasing additives, such as rubber particles.

To be particularly advantageous, it has been found that the closure cap is formed closed except for an opening for receiving the neck of the bottle, wherein the lateral surface of the closure cap in a located between the thread of the lateral surface and the lid portion having a spaced ribs comprising corrugations, wherein the corrugation has a depth of at least 0.1 mm .. Due to the depth of the corrugation opening of the bottle is much easier.

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

An angle of at least 45 ° in the area of the demolition ring substantially increases the mechanical strength of the bottle compared to conventional bottles, so that the bottle is not damaged by high pressures occurring during pasteurisation inside the bottle.

A simple opening of the bottle with a high seal of the closure can be achieved in that the external thread is a catchy thread and a value for a depth of the external thread in a range of values, the lower limit of 0.5 mm and the upper limit of 0.9 is mm and a value for a nominal diameter of the external thread in a value range whose lower limit is 25 mm and whose upper limit is 30 mm and a value for the height of the thread in a range of values, the lower Limit is 9 mm and the upper limit is 15 mm, wherein a number of threads of the external thread is at least two, in particular between two and three. Due to the high depth of the thread, a good seal of the bottle can be ensured, while due to its relatively flat course, a twisting of the cap can be realized with a small amount of force.

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

The effort required to open the bottle can be reduced even further by at least the outer thread being painted with a lacquer, a coefficient of static friction between the lacquer and aluminum being smaller than a static coefficient of friction between aluminum and aluminum.

According to a preferred embodiment, it can be provided that the cover of the closure cap has a sealing insert. By the sealing insert, which may preferably be made of plastic and injected, for example, in the cap, the tightness of the bottle is further increased.

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

Fig. 1

einen Schnitt durch eine erfindungsgemäße Flasche mit abgenommener Verschlusskappe;

Fig. 2

eine perspektivische Ansicht einer Verschlusskappe für die Flasche aus Fig. 1;

Fig. 3

eine perspektivische Ansicht einer Verschlusskappe in einem Rohzustand;

Fig. 4

eine Kontur eines Halses der Flasche aus Fig. 1 im näheren Detail.

In each case, in a highly simplified, schematic representation:

Fig. 1

a section through a bottle according to the invention with removed cap;

Fig. 2

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

Fig. 3

a perspective view of a cap in a raw state;

Fig. 4

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

By way of 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, wherein the disclosures contained in the entire description can be mutatis mutandis to the same parts with the same reference numerals or component names. Also, the location information chosen in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location.

All statements of value ranges in the present description should be understood to include any and all sub-ranges thereof, e.g. is the statement 1 to 10 to be understood that all sub-areas, starting from the lower limit 1 and the upper limit 10 are included, ie. all sub-areas begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

It should be noted at this point that the figures are described below overarching.

According to Fig. 1 For example, 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 of the bottle body 2 may be wholly or partially coated, for example, painted. The bottle body 2 further has a neck 3, on which an external thread 4 is located.

The external thread 4 is preferably a catchy 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 may for example be between 25 mm and 30 mm. According to the illustrated embodiment, the thread may have a height between border 9 mm and 15 mm. A number of threads of the external thread 4 is at least two, in particular between two and three. Particularly preferably, the number of threads of the external thread 4 comes from a range of 2.2 to 2.5. The external thread 4 can be designed as a round thread, wherein a radius of curvature of a thread flank is favorably between 0.4 and 0.8 mm.

The external thread 4 may be painted with a friction-minimizing paint, wherein a coefficient of static friction between the paint and aluminum is smaller than a coefficient of static friction between aluminum and aluminum.

The bottle 1 also includes one in the FIGS. 2 and 3 The cap 5 has a cover 6 and a lateral surface 7, in which a corresponding with the external thread 4 thread 8 is stamped, so that the cap 5 can be solved by the neck 3 by turning and closed by screwing again , Fig. 3 shows the cap 5 in a raw state. In the Fig. 3 shown cap 5 is placed for closing the bottle 1 after filling the bottle 1, wherein the lateral surface 7 comes to rest on the external thread 4 of the neck 3 of the bottle. Then impressed by means not shown here tools, for example by means of rollers, in a conventional manner, the contour of the external thread 4 in the lateral surface 7. As a result, the closure cap 5 is connected to the bottle 1. Subsequently, the bottle 1 can be opened by turning the cap 5 resealable.

To minimize friction, an inside of the lateral surface 7 of the closure cap 5 may be painted with a lacquer, wherein a static coefficient of friction between the lacquer and aluminum is less than a static coefficient of friction between aluminum and aluminum.

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

To improve the handling and to facilitate opening of the bottle 1, an outer side of the closure cap 5 may also be painted with a lacquer, wherein a static friction coefficient between human skin and the mat lacquer is greater than a static coefficient of friction between aluminum and human skin. As a paint for the outside the closure cap 5, for example, a so-called "soft-touch lacquer" can be used.

It should be noted that the indication of coefficient of static friction in this document with respect to a coefficient of static friction between aluminum and aluminum is to be understood as a general reference in terms of a quantitative value, irrespective 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 1.05.

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

How out Fig. 3 it can be seen, the lid 6 may have a groove 18 with a U-shaped cross-section. The groove 18 may rotate along a closed curve, in particular along a circle, and be located for example in a sealing insert 16, which may be made of plastic and injected, for example, in the cap 5. However, the groove 18 is not required, for example, could be dispensed with the groove 18 and the sealing insert 16 also be formed entirely without groove 18.

The edge 9 of the neck 3 of the bottle 1 is formed by a bent portion 10 of the neck 3, which has the shape of a circumferential around an opening of the bottle body 2 bead. As from the illustration in Fig. 1 can be seen, edge 9 of the bottle 1 may have a substantially O-shaped cross-section. A free end of the bent portion 10 may face towards an outer surface of the bottle 1. In principle, it is also possible that the edge 9 is 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 a cover 11 facing the lid 11, the edge 9 is curved.

How out Fig. 3 can be seen, the closure cap 5 may have a demolition ring 12 which is connected via webs 19 lateral surface 7. At the same time, the neck 3 of the bottle 1, as shown in Fig. 1 and 4 having a first adjoining the external thread 4 and located on the outside of the bottle 1 bearing surface 13 for a portion of the tear-off ring 12. The first bearing surface 13 in this case goes over into a likewise arranged on the outside of the bottle 1 second bearing surface 14. The second bearing surface 14 is inclined relative to the first bearing surface 13. Viewed from the direction of the first bearing surface 13, the second bearing surface 14 is inclined in the direction of a longitudinal center plane e of the bottle 1. How out Fig. 4 it can be seen, is an angle α, which is included between the first support surface 13 and one of the first support surface 13 facing portion of a tangent plane t to the second support surface 14, a maximum of 45 °.

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

REFERENCE NUMBERS

1

bottle

2

bottle body

3

neck

4

external thread

5

cap

6

cover

7

lateral surface

8th

thread

9

edge

10

section

11

vertex

12

demolition ring

13

bearing surface

14

bearing surface

15

sealing insert

16

knurl

17

Stege

18

groove

e

Longitudinal center plane

t

tangent

α

angle

Claims (12)

Bottle (1) with a bottle base body (2) made of light metal and with an external thread (4) provided neck (3), wherein the bottle (1) has a sleeve-shaped cap (5) with an opening of the bottle (1) closing lid ( 6) and one on the lid (6) adjoining and with the external thread (4) of the neck (3) in a closed state of the bottle corresponding thread (8) having lateral surface (7), characterized in that the edge (9 ) of the neck (3) of the bottle (1) is formed by a bent portion (10) of the neck (3) surrounding an opening of the bottle body (2), a free end of the folded portion (10) in Direction of an outer or inner surface of the bottle (1) and the bent portion (10) in the region of the cover (6) facing the vertex (11) of the edge (9) is curved and the edge (9) of the bottle (1 ) has a substantially O-fö has in cross-section. Bottle according to claim 1, characterized in that the closure cap (5) has a basic body (12) made of a light metal. Bottle according to claim 2, characterized in that the bottle base body (2) and / or the base body (12), the closure cap (5) made of aluminum or an aluminum alloy are formed. Bottle according to one of claims 1 to 3, characterized in that an inner side of the lateral surface (7) of the closure cap (5) is painted with a paint, wherein a static friction coefficient between the coating and aluminum is smaller than a coefficient of static friction between aluminum and aluminum. Bottle according to one of claims 1 to 4, characterized in that an outer side of the closure cap (5) is painted with a lacquer, wherein a coefficient of static friction between human skin and the mat lacquer is greater than a static coefficient of friction between aluminum and human skin. Bottle according to one of claims 1 to 5, characterized in that the closure cap (5) except for an opening for receiving the neck (3) of the bottle (1) is formed closed, wherein the lateral surface (7) of the closure cap (5) in a corrugation (16) comprising a rib located between the threads (8) of the lateral surface (7) and the cover (6), the corrugations having a depth of at least 0.1 mm. Bottle according to one of claims 1 to 6, characterized in that the closure cap (5) has a tear-off ring (12) which is connected via webs (19) with the lateral surface (7) having the thread (8) and the neck (3 ) of the bottle (1) has a first contact surface (13) adjoining the external thread (4) and located on the outside of the bottle (1), for a section of the tear-off ring (12), the first bearing surface (13) being divided into a second, to the first bearing surface (13) inclined and also located on the outside of the bottle bearing surface (14) merges, the second bearing surface of the first bearing surface (13) towards a bottom of the bottle (1) viewed in the direction of a longitudinal center plane (e ) of the bottle (1) is inclined, wherein an angle (α) between the first bearing surface (13) and one of the first bearing surface (13) facing portion of a tangential plane (t) to the second bearing surface (14) einl ossen is maximum 45 °. Bottle according to one of claims 1 to 7, characterized in that the external thread (4) is a catchy thread and a value for a depth of the external thread (4) lies in a range of values whose lower limit is 0.5 mm and whose upper limit is 0 , 9 mm and a value for a nominal diameter of the external thread (4) is in a value range whose lower limit is 25 mm and the upper limit is 30 mm and a value for the height of the thread is in a value range whose lower limit is 9 mm and whose upper limit is 15 mm, wherein a number of threads of the external thread (4) is at least two, in particular between two and three. Bottle according to one of claims 1 to 8, 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 value range between 0.4 and 0.8 mm. Bottle according to one of claims 1 to 9, characterized in that at least the external thread (4) painted with a lacquer, wherein a coefficient of static friction between the lacquer and aluminum is smaller than a static coefficient of friction between aluminum and aluminum. Bottle according to one of claims 1 to 10, characterized in that the cover (6) of the closure cap (5) has a sealing insert (16). Bottle according to claim 11, characterized in that the sealing insert (16) is made of plastic.

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