GB2479670A - Method for producing a combination packaging container - Google Patents

Abstract

The invention relates to a method for producing a combination packaging container (2), wherein an outer part (4) shaped as a collar is inserted in a deep-drawing mold before deep-drawing a cup-shaped inner container (3). Support means (14) for stacking are formed on the combination packaging container (2) in a section (22) of a bottom region between an end section (16) that can face a contact surface (15) and a support surface (21) that is spaced in the direction of the open end thereof. Viewed from the axial section, a conunon wall section (24) is formed in a linear manner by the container casing (8) and by the outer part (4) between the open end of said section and the section (22) forming the support means (14), wherein the outer part (4) shaped as a collar is designed continuously over the entire wall section (24) all the way to the open end (10).

Description

Method for producing a combination packaging container The invention relates to a method for producing combination packaging containers compris-ing support means for stacking several similar combination packaging containers inside one another, as described in claim 1.

From DE 31 20 075 Al a method and a container produced according to this method are known. In this case prior to the deep drawing a paper container consisting of a container wall and container base is inserted into the deep drawing mold, wherein the mold corresponds at least approximately to the external shape of the combination packaging container to be pro- duced. In said prefabricated paper container during deep drawing process the part of the con-tainer made of plastic and to be formed therefrom is shaped therein, whereby the latter during the deep drawing clings tightly to the inner surface of the paper container and bonds with the latter. To avoid any mutual jamming of similar combination packaging containers stacked inside one another, a stacking shoulder is formed on the container wall in the region of the open end. The latter shoulder is designed to be step-like and projects outwards peripherally. If several similar combination packaging containers are stacked inside one another, the out-wardly projecting stacking shoulder is supported on the container holding said combination packaging container on its upper opening edge. A disadvantage of this is the formation of stacking aids and that the entire outer container, in particular the container base is made of a paper or card material. If the card material comes into contact with moisture this can result in damage to or destruction of the pot.

A further method for the production of a conical plastic container with an outwardly project-ing opening edge by deep drawings is known from EP 0 102 522 Al. In this case the plastic container is formed by deep drawing a plastic film of uniform thickness, whereby the plastic container in the deep drawing mold is joined to a layer made of a different kind of material.

which however does not weld to the plastic material. Said layer made from a different mate-rial is in the form of a sleeve. which prior to the deep drawing in the deep drawing mold is arranged so that its lower and upper edge during the deep drawing are enclosed by the plastic film. In this case during the deep drawing in the area provided for contact with the sleeve the film can be drawn to a minimum thickness ensuring the tightness of the container to be pro-duced. For stacking several similar containers, in the region of the open end an outwardly projecting stacking shoulder is provided, which in the region of the open end is supported on the outwardly projecting opening edge of the additional container. The wall section between the stacking shoulder and the opening edge is in this case designed to be counter conical in relation to the wall section running towards the base, to thus enable the formation of a stack. It is a disadvantage in this case that the stability of the pot is reduced by the stacking shoulder and associated deformation of the sleeve by pressure loading.

From CH 693 611 AS an additional conical combination packaging container is known which comprises a casing part made of cardboard material which runs up to its base edge. The base edge comprises a turned over section which forms an annular container foot. By means of deep drawing an inner container made of plastic is formed into the casing part made from the cardboard material, wherein the inner container covers part of the turned over section of the casing part, wherein by mean of' profiling in this section a form bonded connection is created between the two container parts. In the region of its upper end on the container casing a stack-ing shoulder is formed, so that several identically shaped containers can be stacked loosely inside one another. Here again the container wall is designed to be counter conical relative to the additional wall section, whereby the support of the stacking shoulder on the flange-like projecting upper edge of the additional pot is made possible. By means of the design of the stacking shoulder and the counter conical wall section in turn the stability of the entire combi-nation -packaging container is reduced.

From WO 98/13270 Al a different method for producing a pot-like combination packaging container is known, comprising a plastic inner part and an outer part and a combination pack-aging container produced according to the method. In this case the pot-like inner part made of plastic and the sleeve-like outer part surrounding the plastic inner part are produced separately from one another, To form the combination packaging container the casing-like outer part is pushed over the finally shaped, pot-like plastic inner part and afterwards fixed onto the pot- like plastic inner part. In addition, on the plastic inner part snap connecting means are pro-vided into which the sleeve-like outer part connects to fix onto the pot-like plastic inner part in a detachable manner. In this case a first connecting means is formed in the base section of the pot-like plastic inner part by a peripheral shoulder provided there. the external diameter of which is greater than the internal diameter of the lower edge of the sleeve-like outer part.

When performing the pushing over procedure the sleeve-like outer part with its lower edge is pushed so far over the peripheral shoulder that it connects behind the shoulder. An additional engaging means is formed by the upper outwardly projecting edge of the pot-like plastic inner part. In this case the sleeve-like outer part during the pushing over procedure is pushed with its upper edge so far in the direction of the peripheral edge, until it contacts the latter and after making a connection is held between the edge and the peripheral shoulder. By means of the separate production of the two components prior to joining inside one another, it is possible in a simple manner to arrange stacking aids or stacking means in the region of the base of the pot, in order in this way to be able to stack several similar combination packaging containers inside one another, without the latter getting jammed inside one another.

The underlying objective of the present invention is to create a method for producing combi-nation packaging containers, in which the inner container is shaped in an inline-method into the sleeve-like outer part during its production and stacking means are formed with an un-shaped presentation surface of the outer part. Furthermore however, also the total strength of the pot is intended to be increased and at the same time raw material for the production of the inner container is intended to be saved.

The advantages resulting from the combination of features of claim 1 are that by way of the arrangement of the support means in a section in the base area and on the inner side of the inner container the possibility of stacking is created despite the inline-production method, in order as in the known combination packaging containers produced in the offline method to provide an uninterrupted continuous surface. By means of this displacement of the stacking means in the base area in this way also greater axial pressure can be received and transferred in the direction of the longitudinal axis by the outer part of the combination packaging con- tainer. Furthermore, by means of this direct shaping process production costs can also be re-duced, as subsequent joining processes are unnecessary to form the combination packaging container. Furthermore, by means of the continuously straight wall section of the combination packaging container an optimal design can be obtained for printing, as the preprepared blank remains the same shape after printing in the region of its presentation surface. In this way not only the optical appearance of the entire combination packaging container is improved, but also subsequent shaping procedures for forming the stacking means in the region of the pres-entation surface are avoided.

Furthermore, a procedure according to the features described in claim 2 is also advantageous.

because in this way depending on the wall thickness of the outer part by means of a suitable arrangement of the inner wall part or wall parts for the subsequent shaping procedure the for-mation of the stacking aids or stacking means is achieved without additional auxiliary aids.

The inner wall part or wall parts not only provide a reinforcement and strengthening of the sleeve-like outer part, but also at the same time provide shaping projections or extensions to form the stacking means. Thus in a single shaping procedure during the production of the in-ner container at the same time also the stacking means formed in the holding chamber can be formed.

A further, advantageous procedure is described in claim 3, whereby in the region of the sup-port edge of the outer part an open cut edge can be avoided and depending on the number of turnovers or folded vall parts the height of the stacking shoulder or the support surface formed by the latter can be determined in radial direction relative to the longitudinal axis.

A variant of the method according to claim 4 is also advantageous, as in this way from the open end via the flange and the casing-like outer part the stacking forces can be transmitted to the contact surface. In this vvay it is also possible to reduce the wall thickness of the inner con- tamer to a minimum, whereby this can extend to the film thickness. It only needs to be en-sured that the holding chamber has sufficient tightness.

Furthermore, a procedure according to the features described in claim 5 is also advantageous.

because in this way despite the continuous presentation surface on the outer part in the inline method a stacking can be formed in the region of the container casing, and thus an internal arrangement of the stacking means can be achieved. By providing additional mold inserts prior to the formation of the inner container it is thus possible to provide in particular a stack-ing shoulder between the inner side of the outer part and the container casing in this stacking means.

An additional advantageous procedure is described in claim 6, as in this way as viewed over the circumference an improved mutual support of combination packaging containers stacked inside one another is achievable, Furthermore, a variant of the method according to claim 7 is advantageous, as in this way the demoulding of the combination packaging container produced in the inline method is made possible.

Furthermore, also a procedure according to the features described in claim 8 is advantageous, as in this way from the open end via the flange and the casing-like outer part the stacking forces can be transmitted to the contact surface. In this way it is also possible to reduce the wall thickness of the inner container to a minimum, whereby this can extend to the foil thick-ness. It just needs to be ensured that the holding chamber has sufficient tightness.

A further advantageous procedure is described in claim 9, whereby in the manner of a hollow base by means of the spacing of the base of the inner container from the support edge of the outer part in a simple manner stacking means can be created. By means of the extended de-sign of the casing-like outer part in longitudinal direction over the base, depending on the conicity of the combination packaging container the stacking height is detennined, at which the radial jamming of combination packaging containers of the same type stacked inside one another is prevented.

Also a variant of the method according to claim 10 is advantageous, as thus an additional strengthening of the outer part is provided in its lower end section which can face the contact surface. If the strip-like wall part is produced by flanging or folding over the outer part, in addition a peripheral open cut edge can be avoided in the region of the support edge.

Furthermore, a procedure according to the features described in claim 11 is advantageous, because in this way not only can the strength of the outer part he increased, but with a suitable selection of the insertion part also the stability of the entire combination packaging container can be increased.

A further advantageous procedure is described in claim 12. whereby stacking means can be created which are formed by the inner container itself or in cooperation with shaping elements of the casing4ike outer part thereon, By means of the edge section with the wall part arranged on the inner side of the outer part thus in a simple manner a peripheral stacking shoulder is formed on the inner side of the combination packaging container facing the holding chamber.

An additional defined support means forms the transitional area from the base into the con-tainer casing, which can be produced by exact shaping in the region of the deep drawing mold itself.

A further advantageous procedure is described in claim 13, whereby additional holding means for the mutual mounting of the outer part on the inner container can be omitted.

Furthermore, a procedure according to the features described in claim 14 is advantageous, as in this way the stacking height of combination packaging containers stacked inside one an-other can be kept as low as possible and despite this the mutual radial jamming thereof can be prevented.

A further advantageous procedure is described in claim 15. whereby in the region of the sup-port edge of the outer part an open cut edge can be avoided and depending on the number of turnovers or folded wall parts the height of the stacking shoulder or the support surface formed by the latter can be determined relative to the longitudinal axis in radial direction.

Furthermore, a variant of the method according to the features described in claim 16 is also advantageous, because in this way not only by the deep-drawing mold predefined stacking means or stacking aids can be formed, and at the same time also the shaping onto the outer part can be performed in one step. By means of predefined recesses an exact stacking inside one another of similar combination packaging containers is made possible and any mutual radial jamming is prevented. Since the lower edge section of the outer part facing the base is spaced apart from the base, a simpler demoulding of the combination packaging container can be achieved. Furthermore, here open cut edges are sufficient here, as contact with the contact surface is avoided.

A further advantageous procedure is described in claim 17. as in this way as viewed over the periphery an improved mutual support of combination packaging containers stacked inside one another is made possible.

Furthermore, also a variant of the method according to claim 18 is advantageous, as in this way the demoulding of the combination packaging containers produced in the inline method is made possible.

Lastly, a procedure according to the measures described in claim 19 is advantageous, as thus with a minimum offset of the container wall and design of a shoulder the casing-like outer part can be secured onto the inner container without additional holding or auxiliary means.

For a better understanding of the invention the latter is explained in more detail with reference to the following Figures.

In a much simplified representation: Fig. 1 shows a part section of a deep drawing mold for forming the combination packag-ing counter, in cross section; Fig. 2 shows a first embodiment of a combination packaging container with stacking means in its base area, in axial cross section; Fig. 3 shows the stacking means with identically designed combination packaging con-tainer stacked inside one another according to Fig. 2, in axial cross section and in an enlarged view; Fig. 4 shows a second embodiment of a combination packaging container with stacking means in its base section, in axial cross section; Fig. 5 shows the stacking means with identically designed combination containers stacked inside one another according to Fig. 4. in axial cross section and in an en-larged view; Fig. 6 shows a third embodiment of a combination packaging container with stacking means in its base section. in axial cross section; Fig. 7 shows the stacking means with identically designed combination packaging con-tainers stacked inside one another according to Fig. 6, in axial cross section and in an enlarged view; Fig. 8 shows a fourth embodiment of a combination packaging container with stacking means in its base section, in axial cross section; Fig. 9 shows the stacking means with identically designed combination packaging con-tainers stacked inside one another according to Fig. 8, in axial cross section and in an enlarged view; Fig. 10 shows a fifth embodiment of a combination packaging container with stacking means in its base section, in axial cross section; iS Fig. 11 shows the stacking means with identically designed combination packaging con-tainers stacked inside one another according to Fig. 10, in axial cross section and in an enlarged view; Fig. 12 shows the base section of the combination packaging container according to Figs. 10 and 11, in axial cross section and with a rotated cutting guide relative to Fig. ii.

First of all, it should be noted that in the variously described exemplary embodiments the same parts have been given the same reference numerals and the same component names, whereby the disclosures contained throughout the entire description can be applied to the same parts with the same reference numerals and same component names. Also details relat-ing to position used in the description, such as e.g. top, bottom, side etc. relate to the currently described and represented figure and in case of a change in position should be adjusted to the new position. Furthermore, also individual features or combinations of features from the van-ous exemplary embodiments shown and described can represent in themselves independent or inventive solutions.

All of the details relating to value ranges in the present description are defined such that the latter include any and all part ranges, e.g. a range of 1 to 10 means that all part ranges, starting from the lower limit of 1 to the upper limit 10 are included, i.e. the whole part range begin-ning with a lower limit of I or above and ending at an upper limit of 10 or less, e.g. ito 1.7.

or3.2 to 8.1 or 5.5 to 10.

In Fig. 1 a much simplified deep drawing mold 1 is shown which is used for producing a combination packaging container 2, wherein the latter comprises a pot-like inner container 3 produced by deep drawing and at least one sleeve-like outer part 4.

The pot-like inner container 3 can be formed from one layer 5 by deep drawing, as indicated in the region of the die hollow cavity of the deep drawing mold I by dashed lines. Thus in this method for producing the combination packaging container 2 prior to the deep drawing of the pot-like inner container 3 the sleeve-like outer part 4 is inserted into the deep drawing mold 1 and in the so-called "inline method" the layer 5 forming the inner container 3 is placed against an inner side 7 preferably snuggly adjacent to the latter. The inner side 7 at the same time also represents an inner surface.

As shown best in Figs. 2 and 3, the pot-like inner container 3 comprises a container casing 8, a base 9 and an open end 10 facing away from the latter. In the region of the open end 10 a flange ii projecting outwards over the container casing 8 can be arranged which can be de- signed for the sealing connection with a sealing device not shown here in more detail, in par-ticular as a sealing film or the like. Thus the flange 11 can also be designed as a so-called sealing flange or sealing edge. The base 9 and the container casing 8 thus delimit a holding chamber 12, which is intended for holding and storing different foods for consumption. These can be very different kinds of drinks, dairy products etc. The inner container 3 can be made from any plastic materials but also from other deep-drawable biologically degradable materials. Films made of the material polypropylene (PP) or polystyrene (PS) can be used as the plastics, whereby polypropylene has the disadvantage of having greater shrinking behavior than polystyrene, The pot-like inner container 3 shown -10 -here, in particular its container casing 8, is designed with respect to a longitudinal axis 13 to taper conically from the open end 10 to the base 9.

In previously known combination packaging containers, which have been produced by the so- called "inline method", corresponding stacking aids have been provided or formed in the re-gion of the open end 10, as described in DE 31 20 075 Al and EP 0 102 522 Al but also CH 693 611 AS. In all of these combination packaging containers the sleeve-like outer part 4 in addition to its blank has to be provided with a corresponding stamping or preshaping, in order to form the corresponding stacking means during the deep drawing of the pot like inner con- tamer later. A stacking edge forms the edge between the sealing flange and the container cas- ing and the additional stacking edge is formed by means of a counter-conically shaped con-tainer casing section on the outside of the combination packaging container is formed in the region of its open end.

By means of this prestamping a flat stacking on top of one another of blanks to form the outer parts 4 was difficult to achieve. Since the casing-like outer part 4 has to be placed into the deep drawing mold 1 prior to the deep drawing process, a corresponding shaping of the inner container 3 to be produced could only be performed by a corresponding shaping in the region of the casing-like outer part 4, as the inner container 3 is formed closely adjacent to its inner side 7 during the production process.

In this exemplary embodiment shown here cooperating support means 14 for stacking inside one another several similar combination packaging containers 2 are arranged in the base area or formed there. In this case the transitional or corner section is located between the base 9 and the container wall 8.

As shown best in Fig. 3. for simplicity two identically designed combination packaging con-tainers 2 or 2' stacked inside one another are shown. wherein the first combination packaging container 2 is supported on a contact surface IS, shown in simplified form. The additional identical combination packaging container 2' is provided with the same reference number as the first one but the latter are provided with an additional ". The casing-like outer part 4 is -ii -designed here as a component that is continuous over the circumference, which extends from the open end 10 and from the lower side of the flange 11 arranged or formed there continu-ously up to the contact surface. The combination packaging container 2 thus forms by the interaction of the casing-like outer part 4 with the base 9 an end section 16, which in the usual position of use forms a lower side of the combination packaging container 2. In the region of this end section 16 the casing-like outer part 4 comprises at least one fold or flange, whereby a wall thickness 17 increases to a multiple thereof. Depending on the number of folds or flanges an internal width of the casing-like outer parts 4 is reduced radially inwards according to the folds.

To obtain a continuously running support edge 18 for supporting the combination packaging container 2 on the contact surface 15 it is advantageous if the material or substance of the out-er part 4 is designed to be continuous and thus an open cut edge of the outer part 4 is avoided.

Independently of this, it would also be possible to insert a separate tubular component in the region of the support edge 18 of the outer part 4 and join it to the outer part 4, in order in this way to achieve the desired offset and the associated reduction of the internal width in relation to the inner side 7 to form the support means 14. The support edge here also forms at the same time the lower edge section 34 of the outer part 4.

In the shown exemplary embodiment a double fold is provided, whereby in the end section 16 of the combination packaging container 2 the casing-like outer part 4 as viewed in radial di-rection has a triple wall thickness 17.

As already described above the casing-like outer part 4 is inserted into the deep drawing mold 1 prior to the deep drawing of the inner container 3 and thus forms at least in sections a mold surface for the inner container 3 to be formed subsequently. By means of one or also several radially inwardly projecting wall part 19 or wall parts 19 projecting inwardly relative to the inner side 7 of the casing-like outer parts 4 after the forming of the inner container 3 a periph-eral stacking shoulder 20 is tbrmed in the region of the inner container 3 by said wall part or wall parts 19. The wall part or the wall parts 19 are preferably formed by strip-like conipo- nents running all around. The stacking shoulder 20 formed by the container casing 8 corn- -12 - prises on the side facing the opening end 10 a support surface 21, which in the case of combi-nation packaging containers 2, 2 stacked inside one another is provided for the support of the support edge 18 of the casing-like outer part 4. Thus the wall part or wall parts 19 of the cas-ing-like outer part 4 forms in a transitional area between the base 9 and the container casing 8 shaping means to form the support means 14.

The number of folded over wall parts 19 is dependent on the selected wall thickness 17 of the casing-like outer part 4 and should be adjusted accordingly, in order to ensure a perfect stack-ing inside one another of such combination packaging containers 2, 2', without the latter jamming together and subsequently also friction-less unstacking is ensured.

Thus as viewed in axial direction in relation to the longitudinal axis 13, between the contact surface 15 and the support surface 21 a section 22 is formed, which forms or shapes the sup-port means 14.

Furthermore, it can be seen from an overview of Figs. 2 and 3, that the casing-like outer part 4, starting from its upper edge facing the open end 10 up to the support edge 18 facing the contact surface 15 as viewed in axial section, is designed to be continuous in a straight line. In this way an additional shaping of the outer part 4 in the region of the container casing 8 is avoided. Thus only a simple blank has to be produced to form the casing-like outer part 4, which for example is formed by means of an overlapping seam and a predetermined separa-tion strip arranged or provided there according to EP 0 408 515 Bi or US 5,025,981 A. Said predetermined separating strip, not shown in detail here, is used for separating the casing-like outer part 4, which can be formed from a paper or cardboard material or from a plastic mate- rial, The production of the flanging or the folding over of wall parts 19 is preferably per-formed according to the formation of the peripherally closed casing, but mostly prior to laying into the deep drawing mold I. The support edge 18 forming here a lower edge of the casing-like outer part 4 projects over the lower side of the base 9, by a minimum distance 23, whereby the entire combination packaging container 2 is surrounded continuously from the lower side of the flange ii up to -13 - the contact surface 15 of the casing-like outer part 4, and thus no material of the inner con-tainer 3 can be seen apart from the flange 11. In this way the casing-like outer part 4 takes over the pressure forces from the flange 11 in the direction of the longitudinal axis 13 until reaching the contact surface 15. Thus the inner container 3 does not need to absorb any corn- pressive pressure. The latter is absorbed and transferred exclusively by the outer part 4 pref-erably made from a cardboard sleeve.

By means of the straight design of the casing-like outer part 4 in axial cross section a wall section 24 of the combination packaging container 2 is formed which has an uninterrupted presentation surface on the outside of the casing-like outer part 4 and thereby disruptive edges of interruptions can be avoided. The wall section 24 extends not only from the open end 10 until reaching the support means 14, but further up to the support edge 18 and thereby con-tinuously over the entire longitudinal extension of the pot in the direction of is longitudinal axis 13. Furthermore, in this way also an additional reduction of the material used to form the inner container 3 is possible. if there is not sufficient adhesion of the inner container 3 by the shaping process to the casing-like outer part 4 an additional glue or adhesive can be provided, in order to avoid the unwanted detachment of the casing-like outer part 4 from the inner con-tainer 3. This detachment can be performed for example by a shrinking process of the inner container 3 after its production process. The additional adhesive connection can be selected so that a perfect separation is made possible after the detachment of the outer part 4 from the inner container 3 without destroying the outer part 4 and/or inner container 3.

In Figs. 4 and S an additional and possibly independent embodiment of the combination pack-aging containers 2 is shown, wherein for the same parts the same reference numbers and component names are used as in the preceding Figs. I to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figs. 1 to 3.

This combination packaging container 2 shown here also comprises the inner container 3 and the outer part 4 surrounding the latter. The inner container 3 comprises in turn the container casing 8, at its closed end comprises the base 9 and at its open end 10 the flange 11 projecting -14 -over the container casing 8. The flange 11 can function as a sealing edge, in order to close the holding chamber 12 after filling from the external environment, in particular to seal the latter.

The casing-like outer part 4 extends in turn from the flange 11 in the direction of the contact surface 15 and ends preferably at the level of the base 9 or can project over the latter by the preferably small distance 23. The casing-like outer part 4 has as viewed in radial direction the wall thickness 17 and as viewed in axial section is designed to be continuously straight up to its support edge 18 in the region of its edge section, like the lower edge and forms there to-gether with the inner container 3 the end section 16 of the combination packaging container 2.

To form the stacking shoulder 20 here at least one, preferably over the circumference of the inner container several recesses 25 are provided. Said recesses 25 can be formed by mold in- serts of the deep drawing mold 1 formed preferably adj ustably in the direction of the longitu-dinal axis 13, which are inserted prior to andlor after the insertion of the casing-like outer part 4 in any case prior to the deep drawing and formation of the inner container 3 into the inner chamber or mold cavity surrounded by the outer part 4. If now the casing-like outer part 4 is inserted into the deep drawing mold 1 and the mold insert or inserts forming the recesses 25 are positioned, the deep drawing procedure for forming the inner container 3 can be com-menced. The latter is deep drawn in a known manner and the shaped material or substance for forming the inner container 3 is placed against the inner side 7 of the casing-like outer part 4 or the mold inserts not shown here for the formation of the recess 25 or recesses 25. This is performed by a combined stretching and blowing procedure in a known manner.

The upper side of the recess 25 facing the open end 10, forms in turn the support surface 21 for the additional identical combination packaging container 2' to be held therein. The support surface 21 is formed here by a wall piece arranged radially in a plane aligned perpendicularly to the longitudinal axis 13, which wall piece by means of an additional wall section 26 aligned mostly parallel to the longitudinal axis 13 passes into the base 9. The entire recess 25 is offset inwardly in radial direction in relation to the inner side 7 of the casing-like outer part 4, whereby it is possible to arrange the mold insert or inserts of the deep drawing mold 1 be-tween the inner side 7 of the casing-like outer part 4 and the additional wall section 26 of the -15- recess 25. Furthermore, it is advantageous if in the region of the support edge 18 of the cas-ing-like outer part 4 the wall section 26 is spaced apart at a distance 27 radially therefrom in the direction of the longitudinal axis 13.

The recess or recesses 25 form one of the support means 14, which are arranged or designed here in the form of segments distributed around the circumference in the region of the base 9 and project inwardly into the holding chamber 12. The mutual support in the case of combina-tion packaging containers 2, 2' stacked inside one another is performed by supporting the support edge 18' of the outer part 4' on the support surface 21 of the holding combination packaging container 2.

Furthermore, it would also be possible independently of this to reinforce the casing-like outer part 4 in the region of its support edge 18 with an additional wall part 19 arranged on its inner side 7, as indicated in simplified form by dashed lines. Said wall part 19 arranged or formed iS on the inner side 7 can either be a separate component or also be formed by a turnover or fold-ing over of the material of the outer part 4. By means of this folding over an open cut edge can be avoided in the region of the lower edge of the outer part 4. By means of a suitable Se- lection and quality of the material to form the outer part 4 also an open cut edge can be suffi-cient to form the support edge 18.

The stacking of such combination packaging containers 2, 2' via the support edge 18 or their lower edge section or lower edge should be considered depending on the pot shape and the conicity of the respective inner container 3 and therefore is not possible for all pots and types.

Here too in turn in the "inline method" at least one inner stacking shoulder 20 is formed by the formed recesses 25. Thus for example the ejector of the deep drawing mold 1 or the die fbr producing such combination packaging containers 2 can be designed to have lugs which form the recess 25. In this way between the lugs or moldings of the deep drawing mold 1 and the outer wall of the shaping die a free space can be created to form the recess 25. The card-board sleeve provided with or without a turnover or flange and forming the outer part 4 has to be inserted into the die so that the outer part 4 is inserted into the free space between the lug and the outer wall of the shaping die. In this case at least one stacking shoulder 20 or stacking 16 - lug is necessary, whereby for safety reasons and optical reasons at least 3 or more such stack-ing lugs are formed arranged distributed around the circumference in the base area.

Here too the inner container 3 does not need to be able to absorb compressive pressure during the stacking on top of one another, as the stacking pressure is absorbed by the casing-like out-er part 4 and transmitted between the flange 11 and the lower end section 16, in particular the support edge 18. Thus again disruptive edges or interruptions to the entire outer surface of the outer part 4 are avoided and thus a uniform presentation surface is made available. By means of the support surfaces 21 or stacking shoulders 20 formed by the recess or recesses 25 a Se-cure and easy stacking inside one another of several similar combination packaging containers 2, 2' can be achieved. Here too owing to the support function of the outer part 4 a further re- duction of the material used for the inner container 3 can be achieved. As no mechanical se-curing is provided here by form bonding between the outer part 4 and the inner container 3 and mostly adhesion of the outer part 4 to the inner container 3 formed thereon is not suffi- cient, preferably an adhesion or bonding between these two components is achieved by adhe-sives, such as for example glue or an adhesive point.

In Figs. 6 and 7 an additional and possibly independent design of combination packaging con- tainers 2, 2' is shown, whereby again for the same parts the same reference numbers or corn- ponent names are used as in the preceding Figs. 1 to 5. To avoid unnecessary repetition refer-ence is made to the detailed description in the preceding Figs. I to 5.

The combination packaging container 2, 2' shown here comprises the inner container 3 and the casing-like outer part 4 surrounding the latter. The inner container 3 comprises the con-tamer casing 8, the base 9 arranged in the region of the closed end and in the region of its open end 10 the flange 11 used for the closure. The casing-like outer part 4 extends from the lower side of the preferably circumferentially designed flange 11 in the direction of the base 9 and projects over the latter in the direction of the longitudinal axis 13 by the distance 23. Said distance 23 is selected to be much greater than in the previously shown two embodiments in order to enable geometrically the stacking inside one another of identical combination pack-aging containers 2, 2' without the mutual radial jamming thereof The casing-like outer part 4 -17 -extends as viewed in axial cross section continuously in a straight line from the open end 11, in particular the lower side of the flange 11 facing the base 9, up to the end section 16 facing the contact surface 15 of the combination packaging container 2. The outer part 4 is designed here to be continuously conically tapering from its end section facing the open end 10 up to S the support edge 18. In this way a mutual support acting only in the direction of the longitudi-nal axis 13 can be achieved for combination packaging containers 2, 2' stacked inside one another. In this way an inner side of the base 9 facing the holding chamber 12 forms the sup-port surface 21 and thereby the stacking shoulder 20.

On the lower edge of the outer part 4 facing the contact surface 15 the outer part comprises in turn the support edge 18. Here too it would also be possible to arrange on the inner side 7 of the outer part 4 in the region of the support edge 18 at least one but preferably several wall parts 19, as indicated by dashed lines for a wall part 19. Said additional wall part 19 can be formed either by a separate component or also by flanging or folding a section of the outer part 4. An adequate connection or adhesion should be ensured by the use of a separate wall part 19 in order to achieve a suitable stability and to avoid unwanted separation.

It would also be possible independently of this, as shown in the combination packaging con-tainer 2 supported on the contact surface 15, to provide a separate insertion part 28, which is designed as a tubular component, possibly with a corresponding conicity, and which is en- closed by the radially inner wall part 19 by a folding or flanging of the outer part 4. The inser-tion part 28 can in this case be made from very different materials such as plastic, cardboard, paper, card or the like. In this way the stability and the support behavior can be improved fur-ther. An additional support of the base 9 is achieved when the wall part 19 andlor the insert part 28 extend from the support edge 18 as viewed in axial direction up to the base 9. In this way the base 9 is supported in its transitional area up to the container casing 8, whereby the additional combination packaging container 2' can be supported with its outer part 4' in this reinforced area.

The support means 14 of the combination packaging container 2 shown here are formed by a corresponding cooperation of the casing4ike outer part 4 and its overhang over the base 9 and -18 -by the base 9 itself, whereby the section 22 extends between the contact surface 15 or the support edge 18 and the inner side of the base 9 of the combination packaging container 2.

By means of the overhang of the outer part 4 over the base 9 a kind of hollow base is pro- duced, in which the outer part 4 projects so far over the lower side of the base 9 that this dis-tance 23 is sufficient to ensure a perfect stacking height, which is selected according to the conicity and pot shape. Here too the inner container 3 does not need to absorb any compres-sive pressure, as the latter is absorbed and transferred exclusively by the casing-like outer part 4.

Here too disruptive edges or interruptions to forming a uniform presentation surface are avoided. At the same time in this way an additional reduction in the material used to form the inner container 3 can be achieved. As also mechanical attachment means for holding the outer part on the inner container 3 are not provided, in an advantageous manner an adhesive con-nection in the form of glue or an adhesive point is provided between the inner container 3 and the outer part 4.

By absorbing the compressive pressure as viewed in the direction of the longitudinal axis 13 in connection with the outer part 4 projecting over the base 9 of the inner container 3 a very significant reduction in the material required to form the inner container 3 is achieved. In this way the ratio of used packaging material to the volume of filler material is improved further and thus the ecology of the packaging is increased significantly. An example of this is that with a 100 ml pot with a cross sectional dimension or diameter of 75 mm, the proportion of the material in the inner container 3 relative to the filling volume can be reduced to below 1 %. If the inner container 3 is made from a plastic material and a proportion of 0.8 %, this corresponds to a mass of about 1.5 g for each plastic pot.

With combination packaging containers 2 produced previously in an inline method" a ratio was achieved with a proportion of material of the inner container 3 to the volume of the filled product of about 13 %. This corresponds with an inner container 3 of the previously men- honed holding size to a mass of about 3.1 g. If one considers the total mass of the combina- -19 -tion packaging container 2 without the sealing device, such as for example the sealing plate.

in previous combination packaging containers the mass of 7.3 g was reduced to about 5.7 g (corresponds to about 4.05 %). This corresponds to a proportion of about 3.15 % of the total container.

In Figs, 8 and 9 an additional and possibly independent embodiment of a combination pack-aging container 2, 2' is shown, whereby again for the same parts the same reference numbers and component names are used as in the preceding Figs. 1 to 7. To avoid unnecessary repeti-tion reference is made to the detailed description in the preceding Figs. 1 to 7.

The combination packaging container 2 shown here comprises the inner container 3 and the outer part 4 surrounding the latter. The inner container 3 in the deep-drawing method is formed inline on the outer part 4, whereby the latter is inserted prior to deep-drawing into the deep drawing mold 1. The inner container 3 comprises in turn the container casing 3, at its closed end the base 9, on the opposite end the open end 10 and the flange 11. The latter is used as a sealing edge for sealing with a preferably sealable closing device.

Unlike the previously described embodiments in this exemplary embodiment the casing-like outer part 4 does not extend completely from the flange 11 to the base 9, but ends before reaching the latter. Thus as viewed in the direction of the longitudinal axis 13, the inner con- tainer 3 has a greater longitudinal extension than the outer part 4 arranged thereon. The meth-od of production for forming the combination packaging container 2 corresponds to the one already explained in detail above.

The stacking means 14 are formed here by the cooperative shaping of the inner container 3 and casing-like outer part 4.

As can best be seen from Fig. 9 and as already described above, the outer part 4 ends in the region of the container casing 8 before reaching the end section 16 of the inner container 3 in the region of the base 9. A first stacking means 14, which has been formed with the embodi- -20 -ments described previously in Figs. 2 to 7 by the support edge 18 of the outer part 4, is formed exclusively here by the inner container 3 in the region of the base 9. In a transitional area 29 from the base 9 towards the container casing 8 a corner section 30 is formed. The cor-ner section 30 has an external dimension which is selected so that the latter in the form of a shoulder 31 undergrips the outer part 4 in at least a partly supporting manner outwardly. In an edge section 34 of the outer part 4 facing the base 9 or the contact surface 15 the wall part 19 is provided as viewed in radial direction arranged in the region of the inner side 7. Said wall part 19 can be formed either by folding over or flanging the outer part 4 or also by a separate, independent component, which is joined to the outer part 4. The wall part 19 thus forms a component projecting in the direction of the longitudinal axis 13 and over the inner side 7. By means of the inline forming of the inner container 3 during its production, also in this area a colTesponding offset of the container casing 8 is achieved as viewed in radial direction of the longitudinal axis 13.

At the end of the wall part 19 facing the open end 10, which wall part is delimited by an end face 32, the container casing 8 fits largely snuggly during the production of the inner con- tainer, whereby the additional support means 14 is designed in the form of the stacking shoul- der 20. The stacking shoulder 20 comprises in turn the support surface 2, on which with com-bination packaging containers 2, 2' stacked inside one another the corner section 30' of the base 9 formed by the shoulder 31' is supported. The section 22 of the combination packaging container 2 for forming the support means 14 extends here from the lower side or lower edge of the base 9, in particular the corner section 30 up to the support surface 21 of the stacking shoulder 20, The previously described shoulder 31 forms a shoulder wall 33 between the end section 16 in the region of the base 9 and the lower edge section 34 of the outer part 4, which shoulder wall in relation to the longitudinal axis 13 can have a preferably cylindrical longitudinal path.

However, it would also be possible to align the shoulder wall 33 to be inclined in relation to the longitudinal axis 13. whereby this can extend from a parallel alignment relative to the con-tamer casing 8 up to a counter-conical arrangement. as indicated by dashed tines. In a counter conical design of the shoulder wall 33 depending on the longitudinal extension of the wall part 19 the stacking height of the identical combination packaging containers 2, 2' to be stacked inside one another can be determined. In this way the shoulder wall 33 formed by the shoulder 31 is inclined relative to the container wall 8 of the inner container 3.

In the embodiment shown here the casing-like outer part 4 is secured in a form bonded man-ncr onto the inner container 3, in particular by the shoulder 31 and if necessary by the flange 11. In this way there is no need for additional adhesive or securing means between the outer part 4 and the inner container 3, in particular its container casing 8.

In the embodiment described here of the combination packaging container 2 the full height of the combination packaging container is not available for printing, but only the surface of the outer part 4, which extends circumferentially between its upper end section facing the open end 10 and the lower edge section 34 in the region of the wall part 19. By means of the design and arrangement of the support means 14 in the section 22 of the base area here too the dis-ruptive stacking edges can be avoided in the region of the outside of the outer part 4. Since the load bearing of pressure forces in the base area of the combination packaging container 2 is performed by part of the inner container 3, a reduction in material is achieved only to a lim-ited extent here.

Owing to this geometrical design and the wall part 19 projecting only by a minimal degree inwardly in the direction of the longitudinal axis 13, a simple emptying procedure is still pos-sible. in particular a spooning out of the holding chamber 12, as an almost flat inner wall of the inner container 3 is obtained.

By means of the form bonded embedding of the wall part 19 in the region of its ends spaced apart from one another in the direction of the longitudinal axis 13, the stacking forces can thus be easily absorbed by the entire combination packaging container.

in Figs. 10 to 12 an additional and possibly independent design of a combination packaging container 2 is shown, whereby again for the same parts the same reference numbers and corn- -22 - ponent names are used as in the preceding Figs. 1 to 9. To avoid urmecessary repetition refer-ence is made to the detailed description in the preceding Figs. I to 9.

This embodiment of the combination packaging container 2 shown here corresponds practi- cally to the embodiment described in detail above in Figs. 4 and 5. Therefore, only the differ-ences are described in more detail here.

Unlike the embodiment according to Figs. 4 and 5 the edge section 34 of the casing-like outer part 4 is spaced apart from the end section 16 in the region of the base 9 or the contact surface 15 provided for positioning. The casing-like outer part 4 comprises as viewed in radial direc- tion the wall thickness 17, and is designed as viewed in axial cross section to be straight con-tinuously up to its here lower edge section 34. In the region of its lower edge section 34 or its lower edge the outer part 4 comprises an end face 35, which is formed preferably continu-ously all round over the entire combination packaging container 2.

The support means 14 are formed here by the outside or lower side of the base 9 or 9' and the stacking shoulder 20 formed by the recess 25 with its support surface 21. Depending on the size of the pot at least one such recess 25 is provided, but preferably several such recesses 25 are provided arranged evenly over the circumference of the inner container 3.

Fig. 11 shows a position, in which the two combination packaging containers 2, 2' stacked inside one another are aligned relative to one another such that the recesses 25, 25' formed there in a vertical alignment of the combination packaging container 2, 2' are arranged on top of one another. If there is a corresponding offset or displacement of the recesses 25, 25' in circumferential direction relative to one another, the base 9 projects with its corner section 30 or 30 indicated by dashed lines in radial direction further over the wall section 26 of the re-cess 25 aligned in parallel direction relative to the longitudinal axis 13. Thus an independent support is provided of the two inner containers 3, 3' to be stacked inside one another by the casing-like outer part 4.

-23 -Independently of this it would also be possible to provide the casing-like outer part 4 in the region of its edge section 34 facing the contact surface 15 with an additional wall part 19 on its inner side 7, whereby the latter can be formed either by a turned over section or flange or can also be formed by a separate component. To improve the stabilization and support of the stacking shoulder 20 the wall part 19 with its end face 32 facing the open end 10 can extend up to the stacking shoulder 20.

Since the casing-like outer part 4 does not extend as viewed in the direction of the longitudi-nal axis 13 completely over the entire longitudinal extension or height of the combination packaging container 2, a visible edge of the inner container 3 remains free between the base 9 and the end face 35 of the outer part 4. Owing to the straight design of the outer part 4 as viewed in axial cross section also in the region of the outside disruptive edges or interruptions are avoided, whereby in turn a presentation surface which is important for marketing is kept complete. The secure stacking inside one another of several identical combination packaging containers 2, 2' is performed on the stacking shoulders 20 or the stacking tugs with the base 9, whereby here also definite support conditions can be created solely by the components of the inner container 3.

The section 22 of the combination packaging container 2 between the end section 16 which can face the contact surface 15 and the support surface 21 is used to form the support means 14. whereby here the lower end face 35, which faces the base 9, is arranged as viewed in the direction of the longitudinal axis 13 within this section 22. Preferably, the end face 35 as viewed in the direction of the longitudinal axis 13 is arranged approximately at half the longi-tudinal extension or half the height of the recess 25. The further the end face 35 is spaced apart from the base 9 in the direction of the stacking shoulder 20, the greater the not covered area of the inner container 3.

If the container wall 8 from the corner section 30 of the base 9 to the end face 35 of the outer part 4 is designed so that the latter at least partly overgrips or overlaps the end face 35 in ra- dial direction outwardly a form bond can be made between the outer part 4 and the inner con-tamer 3 and thus the additional application of glue or adhesive between said components can -24 -be omitted. In this case there can be a radial undergripping of the end face 35. This situation is shown in simplified form and in an enlarged view in Fig. 12. This representation is also shown in Fig. 11. The greater the wall thickness of the outer part 4 and the further the end face is radially undergripped by the container casing 8, the greater the thus formed step in the base section.

Independently of this, it would also be possible to design the end section of the inner con-tainer 3 between its base 9 and the end face 35 of the outer part 4 to be similar, as already described above in Fig. 9. Thus a shoulder 31 is formed, which projects over the shoulder wall 33 and the corner section 33 into the base 9. In this case the shoulder wall 33 can have the same inclination relative to the container wall 8 in relation to the longitudinal axis 13 or also can be aligned cylindrically up to a counter-conical inclination.

The exemplary embodiments show possible embodiment variants of the combination packag-ing container 2, whereby it should be noted at this point that the invention is not restricted to the embodiment variants shown in particular, but rather various different combinations of the individual embodiment variants are also possible and this variability, due to the teaching on technical procedure, lies within the ability of a person skilled in the art in this technical field.

Thus all conceivable embodiment variants, which are made possible by combining individual details of the embodiment variants shown and described, are also covered by the scope of protection.

Finally, as a point of formality, it should be noted that for a better understanding of the struc-ture of the combination packaging container 2 the latter and its components have not been represented true to scale in part and/or have been enlarged and/or reduced in size.

The problem forming the basis of the independent solutions according to the invention can be

taken from the description.

-25 -Mainly the individual embodiments shown in Figs. 1; 2; 3; 4; 5; 6, 7; 8, 9; 10 to 12 can form the subject matter of independent solutions according to the invention. The objectives and solutions according to the invention relating thereto can be taken from the detailed descrip-tions of these figures.

-26 -List of Reference Numerals 1 Deep drawing mold 2' Combination packaging container 2 Combination packaging container 3 Inner container 4 Outer part Layer 6 Molding die 7 Inner side 8 Container casing 9 Base 10 Openend 11 Flange 12 Holding chamber 13 Longitudinal axis 14 Support means Contact surface 16 End section 17 Wall thickness 18 Support edge 19 Wall part Stacking shoulder 21 Support surface 22 Section 23 Spacing 24 Wall section Recess 26 Wall section 27 Distance 28 Insertion part 29 Transitional area Corner section 31 Shoulder 32 End face 33 Shoulder wall 34 Edge section End face