WO2010028707A1

WO2010028707A1 - Method for producing a container for receiving a liquid, particularly a liquid beverage, and container for liquids

Info

Publication number: WO2010028707A1
Application number: PCT/EP2009/003750
Authority: WO
Inventors: Klaus Meike
Original assignee: SCHäFER WERKE GMBH
Priority date: 2008-09-13
Filing date: 2009-05-27
Publication date: 2010-03-18
Also published as: DE102008047032B3

Abstract

The invention relates to a container (1) for liquids and a method for producing a container (1) receiving a liquid, particularly a liquid beverage such as beer, soft drinks, and wine, comprising an outer metal jacket (2) provided with rings or edges formed on the head or foot side thereof, and a bladder (3) made of thermoplastic material, particularly PET, disposed therein and comprising a fitting (10) having a closable opening for a pressurized gas on one side and the liquid on the other side for filling with the liquid. In a first step, a tube-shaped blank is formed into a jacket (2) having a shape in the middle region thereof (4) that is adapted to the outer contour of the bladder (3) and having a narrowing transition (5 a, 5 b) recoiling relative to the same, and in a second step the bladder (3) is inserted into the jacket (2), and in a third step a preliminary pressure is applied in the bladder (3) through the fitting (10), said pressure pressing the bladder against the pre-contoured narrowing transition (5 a, 5 b) of the head and/or foot ring (6 a, 7 a) and against the precontoured shape of the middle region (4) with an interference (a) thereto.

Description

Process for producing a liquid, in particular beverage liquids, receiving container and container for liquids

The invention relates to a method for producing a liquid, in particular beverage liquids such as beer, soft drinks and wine, receiving container, consisting of an outer, provided with headed and / or foot-side rings or frames, metallic shell and disposed therein, made of thermoplastic Plastic material, in particular PET, made bubble, which has a fitting with a closable opening for filling with the liquid on the one hand a compressed gas and on the other hand, the liquid. Furthermore, the invention relates to a container for holding liquids, in particular beverage liquid.

In a container known from EP 038 919 A1, a plastic bladder made of PET and a bag or similar bag to be filled with a beverage liquid are arranged for protection during transport and for better stacking in an outer, one-piece jacket housing made of wood or cardboard consists. A container which is largely comparable with this structure has become known from GB 1190593 B, but there for liquids of a different kind and with a one-piece, metallic outer casing or casing.

From WO 2008/000574 A1 it is known to use as a disposable container immediately a PET container produced in spherical shape, which has an inner bag receiving the beverage. This unfolds when filling and prevents air from entering the beer or carbon dioxide escapes. EP 1 736 421 A1 proposes to accommodate such a plastic ball in an insulating and protective, foldable cardboard housing.

By EP 1 293476 B1 a consisting of a multi-part container beverage dispensing device has become known. About a arranged on top of the container, the usual safety fitting, which has a beverage and a gas valve, attachable tap head or attachable connector, the drink can be removed or the container can be filled.

Both this and from EP 1 310 627 A and GB 2 001 032 A known containers are in two parts, consisting of upper and lower part, for example, made of two half shells, or in three parts, consisting of an upper and a lower part with an interposed Pipe section, these parts are connected in all cases by welding. Because of the sometimes rough handling during arrival and removal these containers or barrels are protected against deformation in case of impact and shock loads, including in particular zargenartige head and foot rings contribute, but at the same time also allow good stackability of the container. To comply with the hygiene requirements and to protect against corrosion are also used for beverage containers for decades containers with a body made of stainless steel or a stainless steel bladder and a polyurethane (PU) coat, which, however, increases the cost of construction.

The invention has for its object to provide a method and a beverage container of the type mentioned, which allow an economical, cost-effective production with great flexibility in shape and size, at the same time facilitate recycling and allow filling on conventional, conventional filling. This object is achieved with a method according to the invention in that in a first step, a tubular blank is formed into a mantle with adapted in its central region of the outer contour of the bladder shape and with respect to this receding Rejuvenation transition to the head and / or foot ring, in one second step, the bladder is introduced into the shell and in a third step via supply through the fitting in the bladder a pre-pressure is applied, the bladder to the pre-contoured taper transition of the head and / or foot ring and the other hand with an excess of the pre-contoured shape of the middle area presses.

Apart from the fact that the - for example by Segmentexpandieren - precontoured or expanded sheet metal or steel jacket in one piece and no welding work is required, the plastic bladder or PET container is held not only by friction in the coat, but due to the inventive excess or the cover of the bulbous, central part relative to the tapering portion to the head and / or foot ring out so fixed that the bubble can not slip. This also does not apply to the action of a dynamic force of 150 - 300 kp, as occurs in conventional filling systems as filling pressure. The pressed to the excess of the coat in its central region and there in its outer diameter thus slightly larger bubble can not move or move within the shell. For this purpose, a low excess or admission pressure of not more than 1 bar is sufficient.

A proposal of the invention provides that for dismantling of the container after emptying the bladder is relieved of the form, wherein the diameter of the bladder is reduced by a contrasting from the precontoured shape of the shell minority. This not only a simple assembly and disassembly of the container can be achieved, because the non-pressurized bladder can be easily introduced through the larger shell opening from above or entnom- At the same time, an easy separation and recycling of the materials plastic and sheet steel is made possible.

If a metal coating is advantageously applied to the plastic bubble, an overall metallic appearance can be achieved, as in the case of a container made entirely of steel or stainless steel, but more cost-effective (stainless steel) and much lighter in comparison. Furthermore, the scratch resistance is improved and the cooling effect due to the reflection of heat radiation lasting, as well as a protection against penetration of UV radiation and a diffusion barrier for CO _{2 can be achieved} from the inside to the outside and for oxygen from outside to inside.

The object underlying the invention is achieved for a container for holding liquids, in particular beverage liquids, according to the invention in that a one-piece, cylindrical, metallic shell precontoured with the final shape of the bubble, belly-shaped central region and adjacent to the foot and / or head ring has a tapering transition, on the other hand, the middle region is formed with an excessively larger diameter and thus coverage of the laxative, extractable and express safe held bladder.

Advantageous embodiments of the invention provide that the head ring is provided for easier handling with handle holes, designed to protect against shock and shock of the foot and / or head ring with roll beads and better stackability with stacking edges. Due to the metallic jacket, the container also has a high stability even in humid environments.

A particularly pressure-stable container can be achieved if the bubble has a spherical shape, but optionally also other bubble shapes are used preferably elliptical or elongate, top and bottom end blisters.

Further features and details of the invention will become apparent from the claims and the following description of illustrated in the drawings embodiments of the invention. Show it:

Figure 1 is an overall view of a first embodiment of a container for

Absorption of liquids;

Figure 2 shows the container of Figure 1 in a longitudinal section.

Figure 3 on an enlarged scale the circled in Figure 2 detail "X".

Figure 4 is an overall view of another embodiment of a container for holding beverage liquids;

Figure 5 shows the container of Figure 4 in a longitudinal section. and

Figure 6 on an enlarged scale the circled in Fig. 5 detail "Y".

A container 1 shown in Fig. 1 consists of a metallic shell 2 and a spherical bladder 3 (see Fig. 2) made of thermoplastic material, in particular PET, which is filled with the liquid. The jacket 2 is made in one piece from a cylindrical blank (not shown) precontoured and has a bulbous, the final shape and thus the local circumference of the bubble adapted middle area 4. This includes both up and down with a taper transition 5a and 5b, that is, springing back relative to the central region 4 and, consequently, smaller diameter cylindrical skirt portion 6b, 7b on the one hand a head ring 6a and on the other hand a Fußringeε 7a, also commonly called frames, to.

To support the protection of the bladder 3 against impact and impact, the head and foot rings 6a, 7a are formed with roll beads 8 and for stack-safe and easier stacking of the same containers on the lumbar side with stacking edges 9. The bladder 3 (see Fig. 2) enclosed in the casing 2 after installation has at its upper end a fitting 10 which is framed concentrically by the head ring 6a, over which it is filled and emptied, and which is also used for insertion or removal Removal of the bladder 3 is used.

For the bubble 3, which is finished in itself, has a small degree of dimen- sion b (see in Fig. 3 the dot-dashed course of the bubble 3 ') with respect to the contour of the shell 3 which predetermines the final shape in the installed position (see Fig. 1) so that it can be unhindered from above about there sufficiently larger opening of the head ring 6a in the shell 2 bring. If then a feed is applied via supply line through the fitting 10, which needs to be at most 1 bar, the bladder 3 at the tapering transitions 5a addition to an oversize a, as shown in Fig. 1, to the central region 4 of Mantels 2 pressed from the inside.

Outside the central region 4 of the jacket 2, the bladder 3 or the inner part of the container 1 extends in the free spaces of the jacket sections 6b and 7b, respectively, of the top and bottom rings 6a and 7a. The limitation of the central region 4 of the bladder 3 by the tapering transitions 5a and 5b ensures that the bladder 3 in the filling with the liquid even at the occurring in the filling systems dynamic forces F of 150 to 300 kp positional, immovable their mounting position in complies with the jacket 2. When the container 1 is emptied, the small pre-pressure of the bladder 3 is reduced via the fitting 10 for easy separation and disposal of the bladder 3 made of plastic and the metallic shell 2. The bladder 3 then again assumes its contour reduced by the minimum dimension b, as illustrated in FIG. 3 by the reference numeral 3 'of the dash-dot bladder course, and can be removed from the mantle 2 with air.

The construction and the operating principle of the container 101 shown in Figs. 4 to 6 is completely consistent with the above-described embodiment according to FIGS. 1 to 3. Here is different only the elongated, top and bottom end roundings 11 and 12 having the form of Bladder 103 and thus according to the shell 102, which has an adapted longer central region 104. The limp and clear positioning is ensured by the tapering transitions 105a, 105b as limiting the bubble 103 pressed against the contour of the central region 104 of the jacket 102, while the external shape of the bubble 103 'is reduced by the minimum dimension b (see FIG Fig. 6) is reduced.

The shape and size of the container are arbitrary and easily to the needs, eg. B. 5 or 10 liters disposable keg or for beverage liquids, adaptable, with prefabricated and contoured components are joined together.

LIST OF REFERENCE NUMBERS

1, 101 containers

2, 102 jacket (steel or metal jacket)

3, 103 bubble

4, 104 middle area of the coat

5a, 5b; 105a, 105b Rejuvenation transition

6a, 106a head ring

6b, 106b shell section (of the head ring)

7a, 107a foot ring

7b, 107b shell section (of the foot ring)

8, 108 Rollsick

9, 109 stack edge

10, 110 fitting

11 head end rounding (bladder 103)

12 bottom end rounding (the bladder 103) a oversize b diminution

F dynamic force

Claims

claims

1. A method for producing a liquid, in particular beverage liquids such as beer, soft drinks and wine, receiving container (1, 101), the (2, 102) provided from an outer, with headed and / or foot-side rings or frames, metallic shell ) and a therein arranged, made of thermoplastic material, in particular PET, bladder (3, 103), which for filling with the liquid has a fitting (10, 110) with closable opening for on the one hand a compressed gas and on the other hand, the liquid, characterized in that, in a first step, a tubular blank is formed into a casing (2; 102) having a shape adapted to its outer region (4; 104) and tapering transition (5a, 5b; , 105b), in a second step the bladder (3, 103) is introduced into the shell (2, 102) and in a third step via Supply line through the fitting (10; 110) in the bladder (3; 103) a pre-pressure is applied to the bladder (3; 103) to the pre-contoured taper transition (5a, 5b; 105a, 105b) of the head and / or foot ring (6a, 106a; 107a) and on the other hand with an excess (a) to the pre-contoured shape of the central region (4; 104) presses.

2. Method according to claim 1, characterized in that, for demounting the container (1; 101) after emptying, the bladder (3; 103) is relieved of the admission pressure, the diameter of the bladder (3; decreasing the pre-contoured shape of the jacket (2;

3. The method according to claim 1 or 2, characterized in that on the bladder (3, 103) a metal coating is applied.

4. container (1, 101) for receiving liquids, in particular beverage liquids such as beer, soft drinks and wine, which provided from an outer, with head and / or foot side formed rings or frames, metallic shell (2, 102) and a arranged therein, made of thermoplastic material, in particular PET, bubble (3, 103) which for filling with the liquid, a fitting (10, 110) with closable opening for on the one hand a compressed gas and on the other hand, the liquid, in particular prepared by a method according to claim 1, characterized in that a one-piece, cylindrical metallic shell (2; 102) has a bulbous central region (4; 104) precontoured with the final shape of the bladder (3; 103) and adjoining the head and / or foot ring (6a, 106a, 7a, 107a) towards a tapering transition (5a, 5b, 105a, 105b), in contrast, the central region (4, 104) with a to Oversize (a) larger diameter and thus coverage of the lash-, aus- and express safe held bladder (3; 103) is formed.

5. Container according to claim 4, characterized in that the head ring (6a, 106a) is provided with grip holes.

6. Container according to claim 4 or 5, characterized in that head and / or foot ring (6a, 106a, 7a, 107a) are formed with roll beads (8, 108).

7. Container according to one of claims 4 to 6, characterized in that the head and / or foot ring (6a, 106a, 7a, 107a) are formed with stacking edges (9, 109).

8. Container according to one of claims 4 to 7, characterized in that the bladder (3, 103) is provided with a metallic outer layer.

9. Container according to one of claims 4 to 8, characterized in that the bladder (3) has a spherical shape.

10. Container according to one of claims 4 to 8, characterized in that the bladder has an elliptical shape.

11. A container according to any one of claims 4 to 8, characterized in that the bladder (103) has an elongated shape with top and bottom rounded endings (11, 12).