CN101489771A - Beaker made from a paper material - Google Patents

Abstract

A beaker (1) is described which is made from a paper material, has a fillable interior and is formed by a conical cover (2) and a base (3). At the lower end of the interior, the base is fastened to the cover in a substantially fluidtight manner by way of a chime (4). The cover and/or the base in the region of the chime and/or the chime itself have/has an outwardly protruding widened portion (10) at least in one region along the circumference. A lower edge (14) of the widened portion forms a standing face for the beaker. The widened portion can form a means for holding another beaker of the same type, which means can interact with a beaker of the same type when the beaker is stacked. The beaker can have a heat-insulating outer cover.

Description

Cups made of paper materials

technical field

The invention relates to a cup made of paper material with a fillable interior consisting of a conical shell and a bottom, wherein the bottom is formed at the lower end of the interior by a The rim is substantially fluid-tightly secured to the cup.

Furthermore, the invention relates to a method for producing a cup from paper material, which includes a conical cup shell and a cup base secured by a rim in the region of the smaller circumference of the cup shell.

Background technique

This type of cup became prior art through JP2001-192015A. The rim of the known cup flares downwards. The enlarged diameter serves to fasten the housing, which surrounds the cup delimiting the interior while forming a cavity. Since the enlarged diameter of the rim determines the distance between the inner shell and the outer shell, the enlarged diameter of the rim must run around the circumference. The edge cannot be partially expanded. The shell is placed around the rim, turned inwards and held there. When the housing is fastened to the rim, the tightness of the rim is affected. In addition, it is very cumbersome to fix the shell by flanging.

In the known cup, the shell completely surrounds the rim, so that the rim is no longer visible from the outside. Therefore, when the housing is turned over from the inside and fastened to the rim, reverse fastening from the outside is no longer possible. The shell can be pressed from the inside only with a small force which the rim itself can withstand. If the pressing force is too high, the edge will tear off, on the other hand, if the pressing force is too low, then the fastening of the housing will be defective. When the outer shell is joined by heat sealing, the seal between the bottom of the cup and the shell delimiting the inner cavity will be loosened again, because it is no longer possible to apply from the outside to the edge when sealing the shell turned inward. counter pressure.

On mugs made of paper material, the rim is a very important element of the mug. The rim is necessary for the connection between the shell and the base. On the rim, at least two material layers are placed one above the other in the thickness direction, that is to say the material of the cup bottom and the material of the cup shell delimiting the inner cavity are placed one above the other. Preferably, the cup base is configured in the shape of a basin, the open side of which faces away from the filling opening of the cup. The at least two material layers are thus preferably arranged along the wall of the basin-shaped cup bottom. Furthermore, it can be provided, for example, that the cup shell is beaded around the material of the cup base and that the rim is formed from three or more material layers. The material of the cup base and the material of the cup shell are glued or sealed together in the region of the rim in order to be liquid-tight at least for a certain period of time.

The term "paper material" used for the production of cup base and cup shell can here refer to different materials which have at least one layer made of paper, cardboard or cardboard. Furthermore, the material can have one or more layers made of plastic and/or aluminum. It can also be provided that the paper material is waxed or lacquered in order to be resistant to the liquid to be injected into the interior. Preferably, the paper material is coated with a thin plastic layer, preferably made of polyethylene, at least on one side delimiting the inner cavity. In contrast to purely plastic materials, such paper materials have limited plasticity and especially ductility. When the deformation is too serious, the paper material itself or the provided coating will be torn, so that the sealing performance will be affected. Therefore, in a cup made of paper material, the rim is an important structural feature that cannot be omitted.

Contents of the invention

The object of the invention is to simplify the manufacturability of cups of the type mentioned at the outset and to avoid sealing problems at the rim.

This object is solved in that the cup shell and/or the cup base have, in the region of the rim and/or the rim itself at least in the region of the circumference, an outwardly protruding diameter expansion, and the lower edge A support surface for the cup is formed.

This object is solved methodically by using a substantially liquid-tight semi-finished product with a fillable interior, on which the cup shell and/or cup base are aligned in the region of the rim. /or the rim itself expands outwards in diameter at least in the region along the circumference.

The support surface of the cup is enlarged by the diameter enlargement, even if the diameter enlargement is, for example, only partial, whereby the cup has improved stability. The enlarged diameter is not or not completely covered by the outer shell, so that the material of the cup shell or cup base directly forms the support surface. The rim is thus not compromised with regard to its tightness by the provision of additional material of the housing. In a preferred design solution, the enlarged diameter portion is continuously and uniformly shaped along the circumference. If the paper material is coated, it is advantageous to shape the diameter enlargement only to such an extent that the coating cannot be torn off.

A semi-finished product is used here, on which the cup base and cup shell are already connected fluid-tightly in the region of the rim, so that the diameter enlargement can be formed on the rim without impairing the tightness of the rim. on the edge. Advantageously, use a kind of semi-finished product, in this semi-finished product, said rim extends substantially parallel to the center axis of described cup in axial cross-section, therefore in this cup, under the situation that the cross-section of cup is circular The rim extends substantially cylindrically. It can also be provided that the diameter expansion takes place only partially in the region along the circumference. Due to the no longer conically tapering rim or partial diameter expansion, the required paper material is less ductile and the risk of crack formation is reduced. Nevertheless, the stability of the cup is increased by the enlarged support surface.

In an advantageous refinement of the invention, the rim is not widened over its entire height. Preferably, the region of the rim adjoining the bottom of the cup retains its original shape, while the lower edge of the rim is expanded in diameter. The height of the enlarged diameter on the rim can correspond approximately to half the height of the rim. The rim then has a different inclination, viewed in axial section, relative to the center axis of the cup, wherein the rim expands in diameter at an increasing inclination in the region of the lower edge. The rim has two different height regions that fulfill different functions. The upper height region serves to seal the fillable interior and connects the conical cup shell to the cup base in an essentially fluid-tight manner. In the lower height region of the rim, the material of the cup shell delimiting the interior and/or the wall of the cup base are enlarged and the cup base forms an enlargement of the cup with its lower edge. the supporting surface. In this height region, a liquid-tight connection between the material of the cup base and the material of the cup shell is no longer absolutely necessary.

It is advantageous if the material of the cup shell or cup base is preheated in the region of the rim—at least in the region of the lower edge—before and/or during the diameter expansion. This preheating can take place, for example, by blowing hot air into the rim or by means of a preheated expanding tool. The temperature is preferably selected such that the plastic layer present on the paper material has not yet reached its melting point, but only becomes slightly softer.

Advantageously, the expanding tool has at least two elements, one of which expands the rim from the inside and a second element which acts as a counter tool against the rim from the outside. This ensures that the liquid-tight connection between the cup shell and the cup base does not loosen even when the rim is heated. The two elements of the expanding tool can be formed, for example, by radially movable jaws, by radially movable mandrels or by rollers running around the circumference of the rim.

The cup according to the invention can be used in many ways, since it can be used not only without a casing but also with different casings. A heat-insulating cup is preferably provided, which partially surrounds the cup delimiting the interior while forming the cavity. Prior to the expansion of the rim, the housing is preferably pushed along the center axis onto the conical cup delimiting the interior and secured thereto.

The enlarged diameter on the rim can be used very advantageously to improve the stackability of the cups. Stackable cups are known, for example, from EP 1 227 042 B1. The cup shell delimiting the cavity of the disclosed cup has a first mechanism for holding another cup of the same type. The known cup has a second retaining means on the outer shell with a thermally insulating cavity surrounding the cup shell delimiting the interior. The second holding means are formed by a bead which is arranged on the lower end of the housing and points inwards. When stacking cups, the second retaining means provided on the housing can cooperate with the first retaining means provided on cups of the same type. A plurality of cups stacked on top of each other thus form a stable cup stack in which the stacked cups stand securely on top of each other, but do not jam against one another. The cups in the cup stack can be separated well again because the stacked cups are prevented from being jammed.

A disadvantage of the known cups is that the forces occurring during stacking are transmitted via the cup shell delimiting the interior and via the outer shell. The forces that have to be transmitted inside the cup from the first holding means to the second holding means are first transmitted through the cup shell delimiting the inner chamber to the junction between the inner shell and the outer shell and through This connection passes to the housing. In the housing, the force is then transmitted to the second retaining means, designed as a crimp, and there to the next cup. Both the inner shell and the outer shell must therefore be designed to be sufficiently stable in order to be able to withstand the forces that occur. Furthermore, the connection between the outer shell and the inner shell must also be designed according to the maximum forces that occur.

The freedom of design of the cup according to EP 1 227 042 B1 is limited in a disadvantageous manner, because the second mechanism for holding that is arranged on the housing must always be connected with the first mechanism for holding another cup of the same type. size and the force to be transmitted. It is not possible to assign any desired shape to the housing or to change its shape arbitrarily. Furthermore, it is not possible to remove the casing when required without losing the good stackability.

On the cup according to the invention, a mechanism for holding another cup of the same type is arranged on the rim, which mechanism can cooperate with a cup of the same type when stacking the cups. The holding means are advantageously formed by the enlarged diameter. It is preferably stipulated that a first mechanism for holding is arranged on the cup shell delimiting the inner cavity, and the first mechanism can be used with the first mechanism for holding that is arranged on the enlarged diameter portion of the same type of cups when stacking the cups. The two agencies work together.

The stackable cup is preferably produced by a method with the following method steps:

- forming at least one first means for holding another cup of the same type on said cup shell delimiting the cavity;

- Forming on said rim second means of retention which can cooperate with first means of retention provided on cups of the same type when stacking the cups.

The second holding means are arranged here on the cup shell delimiting the interior or on the bottom of the cup or on the rim by which the cup shell delimiting the interior is connected to the cup bottom. In any case, said second means of retention are provided on an element of the cup which is in contact with said fillable interior.

The advantage of forming the first and second holding means on the pre-processed cup as a semi-finished product is that the semi-finished product can be produced on a conventional cup-making machine, after which the means for making these holding parts are arranged. Mechanism shaped device.

The advantage of the cup according to the invention is that it can also be reliably and stably stacked without the casing and can be dismantled again without jamming. If provision is made for the cup to be provided with a heat-insulating casing, then this casing can be formed largely independently and without the restrictions existing on the cup described in EP 1 227 042 B1. The forces that occur during stacking are transmitted from the first holding means to the second holding means only within the interior of the cup delimiting the interior. A housing is therefore not necessarily required. Nevertheless, if a housing is present, it is not stressed by the forces that occur during stacking. The cup shell delimiting the interior is connected to the cup base via a rim, which is a very stable part of the cup and is especially suitable for absorbing forces. The forces occurring during stacking are transmitted substantially through the cup delimiting the cavity from the first means for holding to the second means for holding, which may be formed by an enlarged diameter on the rim . This makes it possible to form a very stable stack of cups with a large number of cups, which do not then become wedged into each other if the stack of cups is subjected to a bump or is dropped onto the base, for example. The cup shell and cup base delimiting the interior are inherently strong enough to withstand the forces occurring during stacking, since they also have to withstand the forces occurring during filling.

In order to prevent multiple cups from becoming jammed when stacked, it is advantageous if the second means for holding are of a size matching that of the first means for holding another cup of the same type. The first means for holding another cup of the same type can have any desired shape. It is important to form a profile which can withstand the forces acting in the axial direction of the cups, ie the forces acting between the two cups when stacked. The first holding means are preferably designed as ribs or ribs which are formed in the cup delimiting the interior at least in the region of the circumference. The ribs or ribs can be continuous along the circumference or be provided with interruptions.

If it is now provided in the configuration of the invention that the cup has a thermally insulating casing, then in this case the configuration of the thermally insulating casing itself is arbitrary. The housing can be produced, for example, from a plastic-paper material or a composite material. To improve the thermal insulation, the outer shell can also be corrugated, fluted, embossed or provided with a foamed layer. The outer shell can also be multilayered, for example a corrugated middle layer can be provided, which is covered by an outer layer lying flat on top of it. The cups according to the invention can be stacked independently of the outer shell, so that the same inner cup can be combined in a simple and almost arbitrary manner with very different outer shells. Without changing the shape and size of the inner cup or the elements that make up the fillable cavity, it is possible to provide different cups with different visual and tactile appearances, as perceived by the user of the cups. The appearance of the car is mainly determined by the shape of the shell.

In the method for producing a double-walled cup, it is advantageous to carry out the following method steps:

- forming at least one first means for holding another cup of the same type on the shell delimiting the cavity;

- fitting said outer shell onto a conical cup delimiting the inner cavity;

- fixing said shell on the cup delimiting the cavity;

- Forming on the rim a second means of retention which can cooperate with the first means of retention provided on cups of the same type when stacking the cups.

In this case, the outer shell can be fastened to the inner cup, for example, by sealing or gluing. This creates a secure connection between the housing and the cup delimiting the interior, so that the housing is reliably prevented from slipping even if the housing has only a slight height.

In order to achieve a good appearance of the cup, it is advantageous if the shell terminates below the first means for holding another cup of the same type or even below the bottom of the cup. The first holding means arranged on the inner shell are thus covered by the outer shell and are no longer visible from the outside. Furthermore, it is advantageous if the housing terminates above the diameter expansion of the rim. The expansion on the rim is preferably carried out through the cooperation of tools arranged on the outside and inside of the rim, without the casing already being fitted over the cup delimiting the inner chamber not hindering the expansion of the diameter. take shape. The enlarged diameter can thus be shaped very precisely. In order to leave space below the housing for a tool to be placed, a distance of more than 1 mm, in particular more than 2 mm, is preferably provided between the housing and the enlarged diameter.

The enlarged diameter is advantageously enlarged in such a way that a parallel line parallel to the cup shell bounding the inner chamber abutting on the lower edge of the enlarged diameter is at a distance from the inner chamber bounded The outer shell of the cup extends. In order that the outer shell provided does not interfere with the stacking of the cups, it is advantageous if the outer contour of the outer shell lies inside the parallel line parallel to the shell delimiting the inner chamber, which abuts against the expansion of the rim. on the diameter.

Description of drawings

Further advantages and features of the invention emerge from the claims and the following description of some embodiments in conjunction with the drawings. Individual features of the different embodiments shown and described can be combined in any desired manner without departing from the scope of the present invention. in:

Fig. 1 is a longitudinal section of a cup according to the present invention,

Figure 2 is a view similar to Figure 1 of two stacked cups,

Fig. 3 is a sectional view along the sectional plane III-III of Fig. 2 along the edge of the enlarged diameter portion provided with a plurality of parts,

Figures 4 to 7 are views similar to Figure 1 of partially shown cups of different constructions, in which different shells are provided,

FIG. 8 is a longitudinal section similar to FIG. 1 of the edge of the enlarged diameter portion provided with a plurality of parts and the gap between them,

9A to 9K are schematic and only partially shown longitudinal sections in the region of the rim of different embodiments of cups according to the invention.

Detailed ways

The cup 1 shown in FIG. 1 essentially comprises a conical cup shell 2 and a basin-shaped cup base 3 . The open side of the basin-shaped cup base 3 is arranged such that it faces away from the filling opening of the cup 1 . The cup base 3 is connected with its wall 31 to the cup shell 2 in a fluid-tight manner in the region of the smaller circumference of the cup shell 2 via a rim 4 . In the region of the rim 4 the material of the cup shell 2 is placed around the wall 31 of the cup base 3 and turned inwards. The cup shell 2 and the cup base 3 form a fillable interior 5 of the cup 1 . The fillable interior space 5 has a height A. On its upper edge, ie in the region of the larger circumference, the cup 2 delimiting the interior 5 has an outwardly beaded bead 6 surrounding the filling opening.

The “conical” character of the cup 2 is to be understood here in that the cup 2 tapers in the longitudinal section shown in FIG. 1 from the bezel 6 to the cup base 3 . The cup shell 2 has an inclination angle α in the region of the fillable interior 5 relative to the center axis 13 of the cup 1 . What shape the cup 2 has in cross section is immaterial here.

In cross section, the cup 2 can be, for example, circular, oval or also rectangular with rounded corners. The cup 1 has a shape similar to a truncated cone when the cross-section of the conical shell 2 is circular, whereas it has a shape similar to a truncated cone when the cross-section of the conical shell 2 is rectangular. Has a truncated square pyramid shape.

The rim 4 has, at least in the region along its circumference, an outwardly protruding diameter enlargement 10 . The lower edge 14 of the enlarged diameter portion 10 on the rim 4 forms a supporting surface for the cup 1 . The cup 1 stands on its supporting surface when in use, and the supporting surface is enlarged by the enlarged diameter portion 10 . This makes the cup 1 difficult to tip over. The diameter expansion 10 is preferably formed circumferentially along the circumference of the rim 4 .

Said outwardly protruding enlarged diameter portion 10 also forms a mechanism 9 for holding another cup 1' of the same type, which mechanism 9 can cooperate with a cup 1' of the same type when stacking said cups 1. Figure 2 shows the stacking of cups 1 in cups 1' of the same type. The enlarged diameter 10 as means 9 for stacking the cups 1 can co-operate here, for example, with the cup shell 2' delimiting the inner chamber 5'. Other mechanisms for stacking are not necessarily required.

Preferably, the cup shell 2 delimiting the inner chamber 5 has at least one first means 7 for holding another cup 1 of the same type, the first means 7 itself having any desired shape. It is important that the first holding means 7 have at least one profile which can withstand forces acting in the direction of the middle axis 13 of the cups 1, that is to say between the two cups when stacked. The force of action. The first holding means 7 can be formed, for example, by ribs or ribs 8 protruding into the interior of the cup 1 . The cup shell 2 delimiting the interior 5 is beaded around the basin-shaped deep-drawn cup bottom 3 at the rim 4 on which the mentioned widening is arranged and is sealed liquid-tight 10 form the second body 9 .

The dimension Y of said second holding mechanism 9 matches the dimension X of the first mechanism 7 for holding another cup 1' of the same type. In the case of a circular cross-section of the cup 1 , the dimension X of the first holding means 7 corresponds to the inner diameter of the cup shell 2 above the rib 8 . The dimension Y of the second holding means 9 corresponds to the maximum outer diameter of the enlarged diameter portion 10 on the rim, that is to say the diameter surrounding the enlarged diameter portion 10 . The dimensions X and Y are advantageously adjusted in such a way that the dimension Y is selected to be slightly smaller than or at most equal to the dimension X.

The interaction of the first means 7 and the second means 9 for holding is clearly seen on the cups 1 and 1' shown in FIG. 2 . The second mechanism 9 of the cup 1 is received by the first mechanism 7' of the cup 1' provided on the shell 2' delimiting the inner cavity 5'. The enlarged diameter 10 provided on the rim 4 of the cup 1 and in particular the lower end of said enlarged diameter 10 is here supported on the rib 8' which is formed in the cup shell 2'. By matching the dimension X of the first holding mechanism 7 with the dimension Y of the second holding mechanism 9, it is ensured that the enlarged diameter portion 10 of the cup 1 stands upright on the same type of cup stably and reliably. 1' on the rib 8' without getting stuck in the conical cup shell 2'. Forces occurring along the central axis 13 during stacking, such as the weight of the cup 1 and possibly also the cups stacked on top of it, are reliably absorbed by the rib 8' as holding mechanism 7' and passed through the The cup shell 2' is passed on to the lower edge 14' of the rim 4' of the underlying cup 1' and from the support surface on the lower edge 14' to the base. Even if very high forces occur in the direction of the central axis 13, it is guaranteed that the cup 1 or 1' can be easily removed during disassembly.

In order not to affect the tightness of the rim 4 when the diameter-enlargement 10 is shaped, it is advantageous that the height B of the diameter-enlargement 10 - as can be seen in FIG. 1 - be smaller than the total height Z. Due to the smaller height B of the enlarged diameter 10 , a height region C remains on the rim, which assumes the gap between the cup shell 2 delimiting the interior 5 and the cup base 3 seal. In this case, the height B preferably corresponds approximately to half the height Z. Seen in axial section in FIG. 1 , the rim 4 has different inclinations β and γ relative to the center axis 13 of the cup 1 . The inclination β of the height region B of the rim 4 is in any case oriented in such a way that the rim expands towards the lower edge 14 and has a maximum dimension Y at its lower edge 14 , ie parallel to Seen from the center axis 13 , the lower edge 14 of the rim 4 forms the region of the rim 4 that is furthest from the center axis 13 . In the case shown, the rim 4 also tapers in the height region C with an inclination γ that corresponds to the inclination α of the cup 2 in the region of the interior 5 . The enlarged diameter 10 continues in any case up to the lower edge 14 which forms the bearing surface. Further possible configurations of the edge 4 will be explained below with reference to FIG. 9 .

The diameter Y surrounding the enlarged diameter 10 is preferably greater than the diameter D surrounding the region of the cup base 3 that is in contact with the interior 5 . In order to enable effective stacking without the stack height becoming unnecessarily high, it is advantageous if the retaining means 7 arranged on the cup shell 2 delimiting the inner chamber 5 are not arranged above the cup base 3 higher than one-third of the height A of the inner chamber 5 . Even if the mechanism 7 is omitted and the enlarged diameter 10 bears directly on the conical region of the cup shell 2 , the diameter Y surrounding the enlarged diameter 10 is preferably smaller than the approximate diameter above the cup base 3 is the diameter surrounding the inner contour of the cup shell 2 at a height of one-third of the height A.

In the non-expanded height region C, a part of the rim 4 retains its original shape and is not enlarged, which is particularly important for the method according to the invention for producing a stackable cup 1 . What is important is that in this method a semi-finished product with a fillable interior 5 is used, which comprises the conical cup shell 2 and the cup base 3 already fixed therein in a fluid-tight manner. The semi-finished product thus has a rim 4 which, however, does not yet contain the enlarged diameter 10 . The rib 8 serving as the first holding mechanism 7 and the enlarged diameter portion 10 serving as the second holding mechanism 9 are formed on the semi-finished product. The advantage of this method is that the semi-finished product can be manufactured on conventional cup-making machines. The semi-finished product is then conveyed behind this conventional cup-making machine to form the first holding mechanism 7 and the second holding mechanism 9 on the semi-finished product and make stackable cups 1 device. By keeping the height region C undeformed, the tightness of the rim 4 is not affected.

The ribs or ribs 8 can be pressed or rolled by a forming tool which is advanced in the axial or radial direction of the cup 1 towards the shell 2 . The diameter expansion 10 on the rim 4 can be formed, for example, by a conical mandrel which is fed from the underside towards the rim 4 . When necessary, the edge 4 can be heated to form the enlarged diameter portion 10 . Since a forming tool that performs a sliding movement relative to the surface of the rim 4 can very easily lead to the formation of folds, it is also advantageous to form the diameter enlargement 10 by means of a rolling tool or a radially spreading tool. It is advantageous here to feed a correspondingly shaped counterpart tool towards the outer circumference of the rim 4 for supporting the shaping of the enlarged diameter 10 .

FIG. 3 shows a special design of the enlarged diameter portion 10 on the edge 4 . In this case, the enlarged diameter 10 according to FIG. 3 is not designed so as to run around the entire circumference of the rim 4 . Instead, four diameter enlargements 10 are distributed uniformly over the circumference, between which there are respectively provided regions 11 without diameter enlargement, which substantially correspond to the original contour of the rim 4 . Combined with the rib 8 that runs around the entire circumference, when the cup 1 is stacked in a cup 1' of the same type, there is a gap between the shell 2' of the cup 1' or the rib 8' and the unexpanded surface of the cup 1. Air holes 12 are formed between the diameter areas 11, and the air holes 12 can facilitate the disassembly of the cup. Through the air hole 12, when the cup 1 is taken out from the cup 1', the air from the surroundings flows into the inner cavity 5' of the cup 1' in the area below the bottom 3 of the cup 1, so that A negative pressure is formed there that opposes the removal movement of the cup 1 .

In another embodiment of the part of the enlarged diameter 10 of FIG. 3 , apart from the recessed configuration of the region 11 between the four enlarged diameters 10 , this region 11 can also be configured as a straight line or Slightly convex. The contour of the edge 4 can be polygonal, the corners of which are of course rounded. Furthermore, as shown in FIG. 8 , it can be provided that the edge has recesses 111 , gaps or cleavage grooves in the region 11 according to FIG. 3 . Especially if the enlarged diameter 10 protrudes farther outwards, uncontrolled tearing of the paper material of the cup 2 at the lower edge 14 can occur. In order to prevent uncontrolled tearing, as shown in FIG. The height region B of the rim 4 does not need to be sealed for the rim 4 . The height of the recess 111 varies here depending on the ductility of the material on the rim 4 , but does not exceed the height region B significantly, so that a sufficiently large height region C remains for sealing. The recess 111 can either already be provided in the blank of the cup shell 2 before the semi-finished product is produced from the cup shell 2 and the cup base 3 , or it can also be introduced into the finished rim 4 before the expansion.

Although not shown in FIGS. 1 to 3, it is advantageous to assign the cup 1 with a housing according to one of FIGS. surrounded by 2 cup shells. In order not to interfere with the stacking of the cups 1, it is advantageous if the outer contour of the shell lies within a parallel line 15 parallel to the cup shell 2 delimiting the inner cavity 5, wherein the parallel line 15 abuts against On the enlarged diameter portion 10 of the edge 4 . As long as the outer shell is inside the space 16 between the parallel line 15 and the cup shell 2 delimiting the inner cavity 5, the stackability of the cup is in no way affected. Thereby no restrictions are placed on the degree of design freedom. Furthermore, it is possible to assign different housings to the common structure of the cup 1 without having to change the first holding means 7 and the second holding means 9 . Some possible embodiments of such housings are described below with the aid of FIGS. 4 to 7 .

The cups 1 shown in FIGS. 4 to 7 each have thermally insulating outer shells 417 , 517 , 617 and 717 , which partially enclose the cup shell 2 delimiting the interior 5 while forming the cavity 18 . Such cups are also called double-wall insulating cups, and in these insulating cups, the cup shell 2 inside the outer shell 417, 517, 617, 717 together with the cup bottom 3 can also be called an "inner cup". The first mechanism 7 for holding another cup 1' of the same type and the second mechanism 9 for holding are correspondingly constructed similarly to the variant described in FIG. 1 , so that a repeated description can be omitted.

When producing the double-walled cup 1 according to FIGS. 4 to 7 , the first means 7 for holding is formed on the inner cup, which can also already have a curling mouth 6 , as a semi-finished product. The shells 417 , 517 , 617 or 717 are then put on and fastened to the cup 2 delimiting the interior 5 . As a last step, the second means 9 for holding are shaped. The advantage of this is that the second mechanism 9 for holding does not prevent the casing 417, 517, 617, 717 from being put on, and for example, the size Y of the enlarged diameter part 10 can be larger than the casing 417, 517, 617, the inner contour of 717.

The shell 417 of the cup 1 shown in FIG. 4 is arranged substantially parallel to the cup shell 2 delimiting the interior. The outer shell 417 has an inwardly directed bead 419 and 420 at the upper end and at the lower end, respectively, and is supported by the bead 419 and 420 on the cup 2 delimiting the interior 5 . It can be provided that the housing 417 is fastened, for example by gluing, in the region of the beads 419 and/or 420 . The height of the housing 417 can vary as desired as indicated by the bead 420' shown in phantom. It is particularly advantageous if the shell 417 has a height corresponding to the illustrated bead 420 , when the shell 417 is above the enlarged diameter 10 of the rim 4 and below the cup base 3 termination. Preferably, the distance E between the housing 417 and the enlarged diameter portion 10 is approximately 1 to 2 millimeters. Such a height of the casing 417 also ensures that the rim 4 is approached from the outside in the height region B when the casing 417 has been put on, so that the casing 417 does not hinder the use of tools fed in the radial direction from the outside. The enlarged diameter portion 10 is formed. The bead 420 is supported on the inner shell 5 in the region of the rim 4 , whereby the outer shell 417 becomes very stable. At the same time, the housing 417 also covers the first mechanism 7 for holding, so that the first mechanism 7 cannot be seen from the outside. Said ribs 48 are shaped outwardly opposite to FIG. 1 . The force resistance of the holding means 7 can thus be increased, since the stretched paper material of the ribs 48 has a higher stability than the compressed paper material of the ribs 8 of FIG. 1 .

In FIG. 5 , the cup shell 2 delimiting the inner chamber 5 has in the region below the roll mouth 6 an abrupt dimensional change in the form of a shoulder 21 from the cup base 3 to the roll mouth 6 It is shown as a jumpy cross-sectional widening. The outer shell 517 is connected, for example by sealing or gluing, to the cup shell 2 delimiting the interior 5 in the region between the bezel 6 and the shoulder 21 . At its lower end, the housing 517 has an inwardly directed bead 520 similar to bead 420, which can also be located further above in a position 520' shown in dashed lines. The outer casing 517 , which terminates above the cup base 3 , often results in a sufficient thermal insulation effect and has the advantage of reducing the material requirements for the outer casing 517 . As an alternative, the height position of the bead 520 can also be determined according to the selection criteria described below in FIG. 4 and be lower. The retaining means 7 are designed here as rounded ribs 58 , wherein the ribs 58 do not have to be pressed completely around, but can also very advantageously be formed by only point-like pressings in the cup shell 2 . flower composition.

In contrast to the schematic illustration in FIG. 5 , the cup 1 can also be configured in a different configuration in the region of the shoulder 21 . FIG. 5A shows an advantageous variant in the region of the shoulder 21 on a considerably enlarged scale. The region of the cup shell 2 delimiting the interior 5 between the bezel 6 and the shoulder 21 and denoted by the reference numeral 25 in FIG. The axis 13 has a different inclination than the rest of the cup 2 . In FIG. 5A , the region 25 of the cup 2 between the bezel 6 and the shoulder 21 extends approximately parallel to the center axis 13 . In order that the outer shell 517 can be pushed a little below the crimp 6 when it is put on the inner cup 1 , the upper edge region 26 of the outer shell 517 is slightly compressed inwards. The edge region 26 thus does not continue the conical outer shell 517 uniformly, but has a slightly smaller diameter. If the shell 517 is slightly inserted into the bezel 16 with its upper edge as shown in FIG. upper edge. If, in an embodiment not shown, the housing 517 is further inserted into the bezel 6 , the material of the bezel 6 clamps the housing 517 , thereby securing the housing 517 . For certain applications, it may be sufficient to clamp the housing 517 in the bezel 6 as the sole fixation of the housing 517 .

FIG. 6 shows a variant of the housing 617 in which the cavity 18 has its greatest thickness in the upper region and tapers downwards. An inwardly directed bead 619 is provided at the upper end of the housing 617 , which can be supported on the cup 2 delimiting the interior 5 . The housing 617 can likewise end at a distance E above the rim 4 or, as shown, shortly above the diameter enlargement 10 and be sealed there, for example flat. FIG. 6A shows an alternative in which the housing 617 also does not extend parallel to the cup 2 . The shell 617' is flatly sealed under the mouth 6 and the thickness of the cavity 18 increases downwards. At the lower end, the shell 617' is supported on the cup 2 with a bead 620 similar to bead 420. The cup 1 of FIG. 6A has no ribs 68 . In this way, when stacking, the enlarged diameter portion 10 cooperates with another cup 1' of the same type without other mechanisms for stacking, and is directly supported on the cup shell 2 delimiting the inner cavity 5 .

FIG. 7 shows a housing 717 which tightly surrounds the cup 2 delimiting the inner chamber 5 and rests essentially sealingly on the entire surface. Such a casing 717 is sufficient if the requirements for the thermal insulation of the cup 1 are not particularly high. Furthermore, the sealingly abutting outer shell 717 can improve the stability of the cup 1 since the cup shell 2 rests on the outer shell 717 practically over its entire height. The housing 717 is preferably fastened here again by sealing or gluing, wherein the fastening can take place in individual regions or also over the entire surface. In an embodiment of the housing 717 , embossings 23 pointing outwards can be provided in the housing 717 . The embossing 23 may be a design element used to construct the cup, such as in the form of characters representing the contained product. However, the embossing 23 can also be used for a targeted increase of the thermal insulation effect of the outer shell 717 in specific regions, since the cavities 18 are again created below the embossing 23 . The embossing 23 can, for example, be arranged on the cup 1 in the area of the point of contact with the hand grasping the cup 1 .

Even though the ribs 48, 58 of the first holding mechanism 7 have a different design on the cups of FIGS. The size X of the first mechanism 7 of a cup 1' of the same type matches. If dimensions X and Y are the same on the cups 1 of FIGS. 4 to 7 with different shells 417, 517, 617 and 717, then all these cups 1 can also be stacked in any combination with one another without jamming. , because all shells 417 , 517 , 617 and 717 are inside the space 16 between said parallel line 15 and the cup shell 2 forming the inner chamber 5 . In order to change the appearance and tactile sensation of the cup 1, the outer sides 22 of the shells 417, 517, 617, 717 can have different structures. The outer side 22 can, for example, be grooved, embossed, corrugated or have a foamed coating. It can also be provided, for example, that the outer shell 417 , 517 , 617 is configured as a wave and that a further corrugated smooth cover in the form of a cup shell is additionally provided on the outer side 22 in order to further improve the cup 1 insulation effect.

In particular, forming the bead 419 on the shell 417 or fastening the shell 517 in the area of the shoulder 21 of the cup 2 has the advantage that it is already in the area immediately below the bezel 6 A very wide cavity 18 is produced between the cup 2 and the housing 417 , 517 , which cavity 18 has a very high thermal insulation effect. The bead 419 or the shoulder 21 is also ensured without additional means, such as a foam layer or a corrugated paper layer arranged inside the cavity 18 , between the cup shell 2 and the outer shell 417 or 517 . The distance between them is not reduced even under pressure loads, for example caused by gripping hands, and the thermal insulation effect is not lost.

It should also be clearly pointed out here that the different designs of the shells 417, 517, 617 and 717 of the cup 1 and other shaping mechanisms such as ribs 8, 48, 58, 68, 78 or shoulders 21 can be arbitrarily matched to each other as required. combination and is not limited to the variants shown.

FIG. 9 shows in schematic form different configurations of the cup 1 in the region of the rim 4 in the individual views A to K. In the variants of FIGS. 1 to 8 , the rim 4 is always formed from three material layers, that is to say the two material layers of the cup shell 2 that surround the wall 31 of the bowl-shaped cup base 3 inside and out. Such configurations are often advantageous, but not necessarily required to implement the invention. For certain requirements, the variants described below may be advantageous.

In FIG. 9A , the turned-in material of the cup shell 2 extends only over the height region B of the enlarged diameter 10 . In FIG. 9B , the material of the cup base 3 is turned outwards and surrounds the material of the cup shell 2 . The lower edge 14 of the enlarged diameter 10 , which forms the support surface of the cup 1 , is formed in this case from the material of the cup base 3 .

Embodiments are shown in Figures 9C, 9D and 9E in which the rim 4 consists of only two layers of material. In FIG. 9C , both the material of the cup shell 2 and the wall 31 of the cup base 3 end at the lower edge 14 and thus form the support surface. In FIG. 9D , the material of the cup shell 2 is turned inwards, but does not cover the material of the cup base 3 in the region of the wall 31 . The junction 24 between the materials of the cup shell 2 and the cup base 3 can be at different heights, for example just at the limit between the height regions B and C. In this case, the material of the cup bottom 3 is not expanded in diameter when the enlarged diameter portion 10 is formed. The enlarged diameter only joins the double-placed material of the cup shell 2 . The wall 31 of the basin-shaped cup base 3 extends only over the height region C and serves to seal the fillable interior 5 . The rim 4 according to FIG. 9E is designed similarly to FIG. 9D , but here the material of the cup base is turned outwards in the height region B. FIG. The material of the cup 2 extends only over the height region C.

If the material of the cup shell 2 or the cup bottom 3 is stable enough, the flanging shown in FIGS. 9D and 9E can be completely omitted, and the enlarged diameter portion 10 is as shown in FIGS. 9F and 9G The same consists of only one layer of material. For the sealing of the fillable interior 5 , it is sufficient that the materials of the cup base 3 and the cup shell 2 lie one above the other in the height region C and are connected to each other in a liquid-tight manner.

FIGS. 9H , 9J, 9K show configurations of the rim 4 of the cup 1 in which the rim 4 has different inclinations, in particular in the height region C, relative to the center axis 13 . In FIGS. 1 to 8 , the angle of inclination γ corresponds approximately to the angle of inclination α of the cup 2 in the region of the fillable interior 5 . This construction can be produced very simply, since the semifinished product has the same inclination angle α over the entire height before the expansion 10 is provided. However, according to the height Z of the rim 4 and the desired size of the enlarged diameter portion 10, it may be necessary to use a semi-finished product in which the inclination γ of the rim 4 is different from the inclination α for When the edge 4 expands at the lower edge 14, tearing of the paper material is prevented. In this case, it may be sufficient to select the inclination γ as shown in FIG. 9H to be slightly smaller than the inclination α. The inclination γ is preferably reduced such that it is approximately equal to 0°, so that the edge runs approximately parallel to the center axis 13 in the height region C, as shown in FIG. 9J . A larger dimension Y of the diameter-enlargement 10 can thus be achieved with the same diameter expansion. This effect can also be increased if, as shown in FIG. 9K , the edge 4 has expanded in the height region C with an inclination γ. In the variant according to FIG. 9K, the angle of inclination β is preferably greater than the angle of inclination γ.

Claims (19)

1. A cup (1) made of paper material has a fillable inner cavity (5) consisting of a conical cup shell (2) and a cup bottom (3), wherein the The cup bottom (3) is substantially liquid-tightly fixed on the cup shell (2) with an edge (4) on the lower end of the inner cavity (5), and it is characterized in that the cup shell (2) and/or the cup base (3) in the region of the rim (4) and/or the rim (4) itself has an outwardly protruding diameter enlargement (10) at least in the region along the circumference, And the lower edge (14) of the enlarged diameter portion (10) constitutes the supporting surface of the cup (1). 2. Cup according to claim 1, characterized in that the rim (4) has different inclinations (β, γ) in axial section relative to the central axis (13) of the cup (1), In this case, the rim (4) expands in diameter in the region of the lower edge (14) with an enlarged inclination (β). 3. The cup according to claim 1 or 2, characterized in that the height (B) of the enlarged diameter portion (10) on the rim (4) approximately corresponds to the height (A) of the rim (4) half of. 4. The cup according to any one of claims 1 to 3, characterized in that the diameter (Y) surrounding the enlarged diameter portion (10) is greater than the diameter (D) surrounding the cup bottom (3). ). 5. The cup according to any one of claims 1 to 4, characterized in that the rim (4) has a holding mechanism (9) which is used when stacking the The cup (1) can cooperate with the cup (1') of the same type. 6. Cup according to claim 5, characterized in that the enlarged diameter (10) forms the holding means (9). 7. The cup according to claim 5 or 6, characterized in that a first mechanism (7) for holding is arranged on the cup shell (2) delimiting the inner cavity (5), the second mechanism for holding A mechanism (7) can cooperate with a second mechanism (9') for holding provided on a cup (1') of the same type when stacking said cups (1). 8. Cup according to claim 7, characterized in that said holding second mechanism (9) has a size (Y) that is the same as that of the first mechanism (Y) for holding another cup (1') of the same type 7) Match the dimensions (X). 9. The cup according to claim 7 or 8, characterized in that the first means (7) for holding another cup (1') of the same type is configured as ribs (58) or ribs (8; 48 ; 68; 78), the ribs (58) or ribs (8; 48; 68; 78) are formed in the cup shell (2) delimiting the inner cavity (5) at least in the region along the circumference. 10. Cup according to any one of claims 1 to 9, characterized in that the cup (1) has a casing (417; 517; 617; 717). 11. Cup according to claim 10, characterized in that the outer contour of the shell (417; 517; 617; 717) lies on a parallel line parallel to the cup shell (2) delimiting the inner chamber (5) (15) Inside, this parallel line (15) abuts against the enlarged diameter (10) of said rim (4). 12. Cup according to claim 10 or 11, characterized in that the shell (417; 517; 617; 717) terminates below the bottom (3) of the cup and is connected here with the enlarged diameter (10) have a space (E) between them. 13. A method for producing a cup from paper material, which cup comprises a conical cup shell and a cup base fixed liquid-tightly by a rim in the region of the smaller circumference of the cup shell, characterized in that A substantially liquid-tight semi-finished product with a fillable interior, on which the cup shell and/or the cup base in the region of the rim and/or the rim itself faces at least in the region along the circumference Outer diameter. 14. The method as claimed in claim 13, characterized in that a semi-finished product is used, on which the rim runs substantially parallel to the center axis of the cup, viewed in axial section. 15. The method as claimed in claim 13 or 14, characterized in that the paper material in the edge region is preheated before and/or during the diameter expansion. 16. The method as claimed in claim 13, characterized in that the outer shell is pushed onto the conical cup delimiting the inner space and fixed. 17. The method for producing stackable cups according to any one of claims 13 to 16, characterized by the following method steps: - forming at least one first means for holding another cup of the same type on said cup shell delimiting the cavity; - Forming on said rim second means of retention capable of cooperating with the first means of retention provided on cups of the same type when stacking the cups. 18. The method for producing stackable cups according to any one of claims 13 to 17, characterized by the following method steps: - forming at least one first means for holding another cup of the same type on said cup shell delimiting the cavity; - fitting the outer shell onto the conical cup delimiting the inner cavity; - fixing said shell on the cup delimiting the cavity; - After fixing said shell, forming on the rim second means of retention capable of cooperating with the first means of retention provided on cups of the same type when stacking cups. 19. The method according to claim 17 or 18, characterized in that at least one rib or rib is formed on the edge of the cup shell along the delimited cavity as a first mechanism for holding another cup of the same type. in the circular area.

Images