EP0060401A1 - Two-component packaging for pourable media - Google Patents

Abstract

The invention relates to a two-component packaging for pourable media with a closable outlet nozzle. This packaging is particularly suitable for the treatment of hair using hair dye. For this, the two components, namely the actual hair color and a second liquid, usually peroxide, must be stored separately and mixed well immediately before application to the hair. The invention specifies a particularly expedient construction in which the two liquids are accommodated in two different, concentrically arranged containers (1, 6) for the purpose of storing them. Immediately before the hair treatment, the inner container (6), the bottom of which is formed by the base piece (2) of the outer container (1), is moved outwards as far as a stop (8) and, at the same time, the two liquids are mixed well. Special design measures, such as a sealing lip (17) that releases excess pressure and a deformable base piece (2) and a groove (21) prevent the occurrence of a dangerous excess pressure inside the two containers

Description

The invention relates to a two-component packaging for pourable media, which carries at one end an optionally closable outlet nozzle, consisting of an outer container for one component and an elongated container for the second component, which is stored in plain bearings in the storage position, is located at least in part within the outer container and which is displaceable towards the outside in the working position.

Packagings of this type have become known in numerous different embodiments, but have so far not been entirely satisfactory in terms of storage and / or use.

The invention has set itself the task of specifying a new two-component packaging for pourable media by simple design measures without special additional effort, which is both easy to open and operate by the consumer, in which the components are mixed well for use and the filling of the packaging can meet the requirements of series production.

This object is achieved in a two-component packaging of the type mentioned above in that in the neck part of the outer container there is a firmly connected sealing lip which lies tightly against the inner container, in that the inner container has at least one radially on its outside externally extending projection carries and the outer container near the sealing lip carries a stop for this projection, which limits the longitudinal displacement of the inner container when changing from the storage position to the working position and that the outer container has a bottom piece, the central zone of which is surrounded by annularly arranged projections is, which lie close to the side wall of the inner container in the storage position.

Further developments of the invention, which in particular prevent the diffusion of air / oxygen into the interior of the packaging, as well as measures which, in the event of an internal overpressure which forms, do not affect this Make dangerous or lead to the outside, are characterized in the subclaims and are described below in connection with the exemplary embodiments, partially schematically simplified figures. In these, corresponding parts are provided with the same reference numerals, and all details which are not necessary for understanding the invention have been omitted.

• Fig. 1 eine Ausführungsform der Erfindung in Vorratsstellung im Längsschnitt;
• Fig. 2 als konstruktives Detail den in Fig. 1 oben gezeichneten Bereich der in Fig. 1 dargestellten Ausführungsform in größerem Maßstab im Längsschnitt;
• Fig. 3 den in Fig. 1 dargestellten unteren Bereich in einem durch inneren Überdruck im inneren Behälter verformten Zustand im Längsschnitt;
• Fig. 4 die Ausführungsform nach Fig. 1 in Arbeitsstellung, also bei herausgezogenem inneren Behälter in Längsrichtung;
• Fig. 5 ein konstruktives Detail der Fig. 4 in größerem Maßstab im Längsschnitt;
• Fig. 6 als konstruktives Detail den in Fig. 1 unten dargestellten Bereich, jedoch umgekehrt in Füllstellung (noch ohne Bodenstück);
• Fig. 7 das in Fig. 6 gezeigte Detail mit aufgesetztem und am Rande angeschweißtem Bodenstück;
• Fig. 8 eine andere Ausführungsform der Erfindung im Längsschnitt;
• Fig. 9 ein Detail (im Längsschnitt) einer anderen Ausführungsform ähnlich Fig. 7, bei der die äußere Seite der zentralen Zone im Bodenbereich des inneren Behälters durch eine Aluminiumverbundfolie abgedeckt ist;
• Fig. 10 einen Längsschnitt durch eine modifizierte Ausführungsform ähnlich Fig. 1;
• Fig. 11 einen Längsschnitt durch eine weitere Ausführungsform ähnlich Fig. 10;
• Fig. 12 ein Detail einer weiteren Ausführungsform ähnlich Fig. 7 mit modifiziertem Bodenstück.

It shows:

• Figure 1 shows an embodiment of the invention in the storage position in longitudinal section.
• FIG. 2 shows as a constructional detail the area of the embodiment shown in FIG. 1 drawn at the top in FIG. 1 on a larger scale in longitudinal section;
• 3 shows the lower region shown in FIG. 1 in a state in longitudinal section deformed by internal overpressure in the inner container;
• 4 shows the embodiment according to FIG. 1 in the working position, that is to say with the inner container pulled out in the longitudinal direction;
• Fig. 5 shows a constructive detail of Figure 4 on a larger scale in longitudinal section.
• 6 shows as a constructional detail the area shown in FIG. 1 below, but vice versa in the filling position (still without a base piece);
• 7 shows the detail shown in FIG. 6 with the base piece attached and welded to the edge;
• 8 shows another embodiment of the invention in longitudinal section;
• 9 shows a detail (in longitudinal section) of another embodiment similar to FIG. 7, in which the outer side of the central zone in the bottom region of the inner container is covered by an aluminum composite film;
• 10 shows a longitudinal section through a modified embodiment similar to FIG. 1;
• 11 shows a longitudinal section through a further embodiment similar to FIG. 10;
• FIG. 12 shows a detail of a further embodiment similar to FIG. 7 with a modified base piece.

A two-component packaging for hair color is shown in FIGS. 1 to 7. The packaging essentially consists of two concentric containers, which are connected to each other in a very special way.

The outer container 1, which consists of a base piece 2, a side wall 3 and a neck part 4, contains liquid peroxide 5. The inner container 6, which consists essentially of a cylindrical jacket-shaped side wall 7 with a ring-like, lateral projection 8 at the lower end and a neck 9 with an outlet opening 11 which can be closed by a screw cap 10, contains the liquid hair color 12. The bottom part 2 of the outer container simultaneously forms the lower closure or the bottom of the inner container 6. The bottom part 2 has a central, circular zone 2A, which is surrounded by an annular bead 2B, the outer side of which lies closely against the inner side of the side wall 7 of the inner container. The annular bead 2B is chamfered on its outer side 2c in order to keep the radial force component as low as possible in the event of excess pressure occurring in the outer container and to prevent a leak. The circular zone 2A has a greater thickness than the annular bead 2B in order to achieve the highest possible diffusion density.

Due to this special design, the sealing area causing the sealing of the inner container can deform when an overpressure occurs within the inner container 6 and enables gas or liquid exchange in the direction of the space inside the outer container 1 a vacuum generated by oxygen consumption of the hair color the seal system between the side wall 7 of the inner container 6 and the annular bead 2B rather generated a higher surface pressure.

The base piece 2 is equipped with four centering webs 14 in order to ensure that the base piece 2 is correctly inserted into the outer container 1.

The outer container 1 has - as can be clearly seen in the larger scale drawn figure 2 - at its end, drawn in the figures above, a neck part 4 with an internal thread 15, into which the external thread, which is designed as a mating member, is located on the outside of the inner container 6 16 is screwed in. A sealing lip 17 is arranged below the two threads 15 and 16. This is designed such that the inner container 6 can be inserted into the outer container 1 from above. Furthermore, the sealing lip 17 is designed such that after the inner container has been inserted into the outer container, it lies sealingly against the side wall 7 with slight pretension.

The sealing lip 17 also serves as a safety valve against excessive internal pressure in the outer container. If this internal pressure - for whatever reason - rises above a predetermined value, then the sealing lip is lifted off the side wall 7 and the excess gas pressure is blown off in the direction of the arrows 18 (in FIG. 2).

On the side of the sealing lip facing the interior of the outer container 1, an annular chamber 19 is provided, which is dimensioned in relation to the lateral projection 8 of the inner container 6 such that in the working position of the packaging shown in FIG of the inner container firmly connected annular projection 8 fits exactly into the annular chamber 19. This ensures that the inner container 6 having the outlet opening 11 in its neck 9 is well fixed in the outer container 1 in the working position. The inner container 6 has between the part provided with the external thread 16 and the outlet opening 11 an area designed as a handle 20 with a structured surface.

In order to bring the two-component packaging from the storage position shown in FIG. 1 to the working position shown in FIG. 4, the outer container 1, which is oval in cross section, is expediently held with one hand and the handle 20 is rotated with the other hand so that the in the neck 4 of the outer container screwed inner container 6 is unscrewed. As a result, the lower end of the cylindrical side wall 7 of the inner container 6 is pulled off from the annular bead 2B of the base piece 2 and, after the unscrewing has been completed, the inner container 6 is then pulled longitudinally out of the neck of the outer container 1 until it enters the annular one Chamber 19 drawn annular projection 8 limits the longitudinal movement and at the same time fixes the relative position of the two containers 1 and 6. As a result, a good mixture of the liquid hair color 12 with the liquid peroxide 5 is immediately achieved.

The lateral projection 8 pressed onto the lower end of the side wall 7 is slightly conical on the outer circumference 8A and the corresponding counter surface 19A of the annular chamber 19 is analogously conical in order to ensure a good fit in the working position (see FIG. 4 and in particular FIG. 5) guarantee.

As indicated in FIG. 6, the two components are filled into the packaging with the inner container 6 pushed in and the base piece 2 removed, while the two openings of the two containers are pivoted upward. The base piece 2 is then inserted, as shown on a larger scale in FIG. 7, and welded at the edge to the outer wall 3 of the outer container 1.

The volume of the outer container is selected such that during the transition to the working position, that is to say during the pulling up of the inner container, despite the outer wall of the filling level of the peroxide falling in as a result of the resulting negative pressure, it lies below the lower end of the raised inner container. This enables a good mixture of the two components.

As a rule, it is unavoidable that peroxides release some oxygen. This creates a certain exercise pressure. Existing overpressures can be reduced due to the increase in volume that occurs during the transition to the working position. This excess pressure supports the manual pulling out of the inner container 6.

In general, it is expedient to provide a longitudinal channel designed as a groove 21 on the outside of the cylindrical jacket-shaped side wall 7 of the inner container 6. This is arranged such that it is in its storage position with its entire length inside the outer container 1, but in the working position it is partly inside the outer container 1 and partly outside this container. As a result, the interior can be vented shortly before reaching the working position and an overpressure or underpressure can be reduced depending on the type and amount of the filling.

If an appreciable excess pressure arises in the interior of the inner container 6, the annular bead 2B is deformed somewhat and some liquid - as indicated by the arrows 22 in FIG. 3 - passes into the outer container 1, as a result of which the excess pressure in the inner container is reduced.

If a strong excess pressure arises in the interior of the inner container 6, then the middle part 2A of the base piece 2 can be deformed by this, as is shown by broken lines in FIG. 3. This ensures extensive security against damage to the packaging due to excess pressure in the inner container 6.

In the embodiment of the invention shown in longitudinal section in FIG. 8, the outlet opening 11, which is closed by a screw cap 10, is arranged on a neck extension 29 connected to the outer container 1.

The inner container 6 'carries at its lower end an external thread 16 which is screwed into an internal thread 15 of the external container 1'. The bottom part of the inner container 6 'has an upwardly bent flange-like edge 30A on the outside. By rotating the flange-like edge 30A against the side wall 3 'of the outer container 1', the external thread 16 is unscrewed from the internal thread 15 and then the inner container 6 'is pulled downward until the ring-like fastened to the cylindrical-shaped side wall 7' of the inner container 6 ' lateral projection 8 'against the bottom of the annular chamber 19' acting as a stop, then a good quick mixing of the two separately stored components is effected. In this case too, it is expedient to provide a channel formed as a groove 21.

In a variant of the embodiment shown in FIG. 8 - as indicated by broken lines - the neck extension 29A is arranged eccentrically on the edge.

The numbers in FIG. 8 designated by an index functionally correspond to the components shown in FIGS. 1 to 7 with the same numbers without an index.

The two-component packaging according to the invention also has the following two advantages. By pulling out the inner container 6 or 6 ', the excess pressure which arises when the two components reacting with one another is discharged to the outside through the groove 21, so that when the screw cap 10 is unscrewed, the user is not sprayed with any liquid from the outlet opening 11.

Due to the special design of the outer and inner container, no residual amount remains in the interior in the region of the annular chamber 19 closed by the annular projection 8 when the liquid is poured out.

So that the annular projection 8 after plugging onto the lower end of the inner container 6 after previous assembly of the inner Container 6 is securely held there in the outer container 1, a snap connection can be formed with an annular groove 8a on the outside of the inner container 6 and a rib-shaped projection 8b on the annular projection 8, as shown in FIG. In this embodiment (similar to FIG. 7), the base piece 2 is also covered on its outer side of the central zone 2A in the base region of the inner container 6. The aluminum composite film 21 consists of an inner plastic film 32 and an outer aluminum film 33 glued to this plastic film, the base piece 2 being firmly welded to the inner plastic film 32 before assembly. As a result, the oxygen diffusion from the outside in is largely prevented, so that an oxidizing hair color present in the inner container 6 is protected from the action of atmospheric oxygen.

In a preferred embodiment, the outer container 1 has an oval cross section, FIGS. 1 to 9 each representing the broad side of this container 1, while its narrow side is not shown.

In a further embodiment according to FIG. 10, in contrast to the embodiment of FIG. 1, the base piece 2 is configured differently and the aluminum composite foil 31 arranged outside of the base piece 2 in FIG. 9 is welded to the lower end of the container 6 after completion of the filling process. The base piece 2 is convexly curved and elastically deformable and carries on its inside a plurality of projections 34 which are distributed around the circumference and surround the central zone 2A in a ring shape, only two of which are shown in FIG. 10 and which in the storage position have the annular projection 8 from the outside touchingly surrounded. The free, axially projecting end of these projections 34 is beveled on the inside, so that a conical opening funnel for better guidance of the ring-shaped projection 8 is created when the bottom piece 2 is placed on the aluminum composite film 31 after completion of the welding process. Furthermore, the inside of the bottom piece 2 carries ring-shaped, axially inwardly projecting and in the storage position the aluminum composite foil 31 of the inner container 6 just not touching cutting teeth 35, which come to lie just inside the inner wall of the container 6 in the storage position.

The mode of action is as follows: To use this two-component packaging, pressure, e.g. of the thumb, in the direction of arrow 36 while simultaneously rotating the inner container 6 by the screwing-on screw thread (15, 16) - the aluminum composite film 31 is cut out in a ring shape so that the two components can be mixed and dispensed as described above.

In a further embodiment according to FIG. 11, in contrast to FIG. 10, the base piece is made of non-deformable material as in the embodiment of FIG. 1, with the bottom piece 2 not being pressed in from the outside, but for the cutting of the aluminum composite foil 31, but the inner one Container 6 must perform an additional downward movement in addition to the rotary movement. This can be done on the one hand by means of a container 6 which is not completely screwed in in the storage position by the axial length of the cutting stroke by means of a screw thread (not shown) (similar to 14/15 in FIG. 10). In Fig. 11, a sliding fit is provided on the neck part 4 instead of a screw thread, which consists of a coaxial hollow cylindrical recess 37 formed on the inner wall of the neck part 4 with a radially inwardly projecting, circumferential stroke limiting wall 39 and a correspondingly adapted cylindrical outer surface 40 on the inner container 6 is formed. In the storage position, an intermediate ring 41 with a perforated predetermined breaking point (not shown) and a grip tab 42 is arranged between a flange 43 of the inner container and the end face 44 of the free end of the neck part 4 on the outer container 1 in a known manner.

The mode of operation is as follows: After tearing off the intermediate ring 41 by means of the grip tab 42, which serves as a transport and tamper-evident device, the container 6 is axially displaced in the direction of the arrow 45 (lower stroke limitation due to the interaction of the flange 43 and the end face 44) combined with a Rotating movement by means of the cutting teeth 35 cut out the aluminum composite film 31. The inner container 6 is then moved into the working position (similar to that in FIG. 4) by pulling it out axially opposite to the direction of arrow 45. The further mode of operation corresponds to the mode of operation described earlier in FIG. 1.

So that the outlet opening 11 is not closed in the pouring position by the falling cut aluminum composite film 31 when the container contents are being discharged, the rotary movement can be limited in the embodiment according to FIG. 10 by the screw thread 15/16 in a manner not shown, so that a small angular range of Aluminum composite film 31 is not cut out and acts as a folding hinge, which means that it does not move freely. Similarly, in the embodiment according to FIG. 11, the cutting teeth 35 can be replaced in a further embodiment, not shown, by an annular cutting knife extending over a central angle of somewhat less than 360 °. As a result, the aluminum composite film 31 is not completely cut out when there is no rotary movement during the depression of the inner container 6, so that it is then only pivoted away.

The modified embodiment shown in FIG. 12 has a modified base piece 2 with respect to the embodiment of FIG. 1, in which the annular bead 2B is not double-walled, but only single-walled. Due to the flatter design of the annular bead 2B compared to that of FIG. 7, there are lower withdrawal forces for the inner container 6, which must be applied by the user by hand when unscrewing by means of the handle 20 in order to transfer the transport position into the working position.

Claims (21)

1. Two-component packaging for pourable media, which carries at one end an optionally closable outlet nozzle, consisting of an outer container for one component and an elongated container for the second component, which is stored in the storage position in plain bearings, at least for Part is located inside the outer container and can be displaced outward into the working position, characterized in that in the neck part (4) of the outer container there is a sealing lip (17) firmly connected to the inner container (6), that the inner container (6) carries on its outside at least one radially outwardly extending projection (8) and the outer container (1) near the sealing lip (1'7) carries a stop for this projection (8), which the transition from the storage position to the working position limits the longitudinal displacement of the inner container (6) and that the outer container (1) has a bottom piece (2) has, whose central zone (2A) is surrounded by ring-shaped projections (2B or 34) which, in the storage position, lie close to the side wall (7) of the inner container (Fig. 1 and 9). 2. Two-component packaging according to claim 1, characterized in that the annularly arranged projections are formed as an annular bead (2B) which, in the storage position, bears tightly against the inside of the preferably cylindrical jacket-side wall (7) of the inner container (6) (Fig . 1 and 12). 3. Two-component packaging according to claim 1, characterized in that the bottom piece (2) has an inwardly drawn central zone (2A). 4. Two-component packaging according to claim 1, characterized by, such an arrangement and shape of the inside of the outer container (1) attached, made of resilient material sealing lip (17) that this in the area where the Touches the side wall (7) of the inner container (6), (towards the free end of the sealing lip) from the inside of the outer container (1) towards the outside (Fig. 2). 5. Two-component packaging according to claim 1, characterized in that in the region of the sealing lip (17) on the inside of the outer container (1) facing side a preferably annular chamber (19) is provided and on the outer wall of the inner Container (6) arranged projection (8) is designed such that it can be inserted into the interior of the annular chamber (19) during the transition into the working position (Fig. 4). 6. Two-component packaging according to claim 1, characterized in that the outer container (1), preferably in a neck part (4), has an internal thread (15) on the inside and the inner container (6) on its outside external thread (16) designed as a counter member and the two threads are arranged with respect to the longitudinal dimension of the two containers in such a way that in the rest position, in which the wall of the inner container (6) is close to the annular bead (2B) of the base piece (2 ) is present, the external thread (16) of the inner container (6) is screwed inside the thread (15) of the outer container (1). 7. Two-component packaging according to claim 1, characterized in that the bottom piece (2) facing the end of the side wall (3) of the outer container (1) has on its inside an inwardly projecting, preferably rounded paragraph, against the the bottom piece (2) abuts, which is preferably connected to the outer container (1) by welding (FIG. 7). 8. Two-component packaging according to claim 1, characterized in that the bottom piece is inserted into an annular groove in the side wall (3) of the outer container (1) (Fig. 7). 9. Two-component packaging according to claim 1, characterized in that the bottom piece (2) consists of more flexible, more easily deformable material than the side wall (3) of the outer container (1). 10. Two-component packaging according to claim 1, characterized in that the bottom piece (2) consists of more flexible, more easily deformable material than the side wall (3) of the inner container (6) (Fig. 7). 11. Two-component packaging according to claim 1 and 7, characterized in that the side wall (3) of the outer container (1) and the bottom piece (2) consist of polyethylene or preferably polypropylene (Fig. 7). 12. Two-component packaging according to claim 1, characterized in that the bottom piece (2) is covered on its outer side by an aluminum foil, preferably only in the central region (2A) covering the bottom region of the inner container (6), wherein the aluminum foil (33) is preferably firmly connected on the side facing the base piece with a plastic film (32), the outer edge of which is firmly welded to the base piece (2) (FIG. 9). 13. Two-component packaging according to claim 1, characterized in that on the outside of the inner container (6) a longitudinally extending groove (21) is provided, which is arranged such that it is in storage position along its entire length inside the outer container (1), but in the working position partly inside the outer container (1), partly outside this container (Fig. 4). 14. Two-component packaging according to claim 1, characterized in that the inner container (6) in the area between the external thread (16) and the outlet nozzle (11) has a handle (20) with a structured, preferably knurled edge (Fig. 1) . 15. Two-component packaging according to claim 1, characterized in that the outer container (1) has an oval cross-section. 16. Two-component packaging according to claim 1, characterized in that the inner container (6) has a circular cross-section at least in its area located within the outer container (1). 17. Two-component packaging according to claim 1, characterized by the use as a storage container for hair dye, the hair color component preferably being in the inner container (6) and the hydrogen peroxide component in the outer container (1) in the storage position. 18. Two-component packaging according to claim 1, characterized in that the end of the inner container (6) adjacent to the bottom piece (2) is fixedly connected, preferably welded, with an aluminum composite film (31) and the opposite inner wall of the bottom piece (2) carries at least one cutting tooth (35), preferably a plurality of cutting teeth (35) protruding inwardly in a ring on a central zone (2A), the height of which is dimensioned such that these cutting teeth do not destroy the opposite aluminum composite film (31) in the storage position ( 10, 11). 19. Two-component packaging according to claim 1 and 18, characterized in that the projections (34) arranged in a ring around the central zone (2A) of the base piece (2) each have a longitudinal profile widening on their inside towards the base piece (2) and together form a conical opening funnel, the inside of which in the region of the smallest clear diameter of the opening funnel in the storage position preferably touches the radial projections (8) fixedly arranged in a ring on the inner container (6) from the outside (FIGS. 10, 11). 20. Two-component packaging according to claim 1 and 18, characterized in that the bottom piece (2) is elastically deformable and is preferably concavely curved inwards (Fig. 10). 21. Two-component packaging according to claim 1 and 18, characterized in that the bottom piece (2) has an inwardly drawn central zone (2A) and that the inner container (6) from the storage position axially in the direction of the cutting teeth ( 35) can be moved into a lower intermediate position to such an extent that the aluminum composite film (31) is destroyed (FIG. 11).

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