EP2540636B1 - Container made of a paper material and device for producing a container made of a paper material - Google Patents

Description

The invention relates to a cup of paper material with a fillable interior, which is formed by means of an at least partially conical shell and a bottom, wherein the bottom is connected in the region of the lower end of the interior substantially liquid-tight with the shell, wherein the shell of a flat Blank is formed, whose end faces are connected to each other in the region of an overlap, and wherein the inner space bounding shell has at least one circumferentially extending indentation.

From the German patent application DE 10 2004 056 932 A1 a cup of a paper material according to the preamble of claim 1 is known. The cup has a circumferential indentation above the bottom, which is designed as a so-called stacking shoulder and is intended to hold the bottom roll of an outer jacket of the respective upper cup in the stacked state of several cups. The indentation is circumferential around the circumference of the shell of the inner cup formed and is formed by pushing an annular punch, while the inside of the inner cup is supported by a mandrel. The indentation is introduced to the finished inner cup, ie in a state in which a cup-shaped bottom is already connected liquid-tight with the conical shell of the inner cup to form a bottom frame and in which at the upper edge of the shell of the inner cup already a mouth roll is formed.

From the European patent application EP 1 785 265 A1 is a substantially identically constructed cup known. When forming the circumferential stacking shoulder by means of an annular punch, a mandrel is placed inside the inner cup so that a location on the mandrel with a reduced outer circumference is located adjacent to the overlap region. In the region of the overlap, the mandrel arranged within the inner cup thus has a recess in order to be able to absorb twice the material thickness in the region of the overlap when the stacking shoulder is formed. This makes it possible to evenly mold the stacking shoulder on the outer circumference of the inner cup without squeezing the material in this area. The peripheral stacking shoulder is introduced into the essentially finished inner cup, which thus already has a cup-shaped bottom, which is liquid-tightly connected to the shell to form a bottom frame and which already has an integrally formed mouth roll at the upper edge of the shell.

The area of the overlap is critical in the case of strong character of the circulating stacking shoulder or when using inexpensive and less easily deformable materials and leaks may occur in the area of this overlap. The shaping of the circumferential stacking shoulder can also lead to unfavorable material shifts that can deform the cup bottom so that it is no longer flat.

The invention is intended to provide an improved cup of paper material and an improved method for producing such a cup.

According to the invention, a cup made of paper material with a fillable interior, which is formed by means of an at least partially conical shell and a bottom, provided, wherein the bottom is connected in the region of the lower end of the interior substantially liquid-tight with the shell, wherein the shell a flat blank is formed whose end faces are connected to each other in the region of an overlap, and wherein the sheath bounding the interior has at least one circumferentially extending indentation, wherein the indentation in the region of the overlap is not formed.

Surprisingly, by eliminating the indentation or the stacking shoulder in the region of the side seam, ie the region of the overlap, an improved cup of paper material can be realized by avoiding leaks in the region of this side seam. This is because no deformation takes place in this area of the overlap. It can thereby be ensured that the side seam does not rise again and the front sides of the jacket do not separate again in the region of the overlap. Nevertheless, despite the recessed in the region of the overlap molding very good stacking properties of the cup according to the invention can be achieved.

In a further development of the invention, the indentation, with the exception of the region of the overlap, extends over the entire circumference of the jacket.

In this way, the indentation can serve as a means for holding another cup, and since the indentation, except for the area of overlap, is present over the entire circumference of the shell, very good stacking properties can be achieved.

In a further development of the invention, the indentation is curved or bent adjacent to the region of the overlap, the indentation, viewed in the direction of the region of the overlap, extending to both sides of the region of the overlap curved or bent towards the bottom of the cup ,

By such a bent or curved course of the indentation on both sides of the region of the overlap can be material stresses that are due to the special structure of the paper material used for cup largely avoid or so dominate that they do not lead to irregularly deformed cups. The indentation thus does not terminate abruptly before the region of the overlap, but extends bent or curved in the direction of the bottom of the cup. The bent or curved course of the indentation helps avoid areas of excessive deformation in which the paper material could break.

In a further development of the invention, the indentation in the direction of the region of the overlap extends from a course in the circumferential direction through an angle of 90 ° curved toward the ground.

In this way, good stacking properties of the molding can be combined with a deformation-free area at the overlap and the avoidance of excessive material deformations.

In a further development of the invention, the indentation is curved in a circular arc.

The arcuate course of the indentation at an angle of 90 ° curved on the ground helps to avoid material stresses.

In a development of the invention, a depth of the indentation in the radial direction in one direction decreases to the area of the overlap.

In this way, the depth of the indentation and thus also the required material deformation can be reduced gradually towards the overlap. Advantageously, the depth of the indentation is reduced to zero. In this case, the indentation does not abruptly end and at the transition to the overlap area, excessive material stresses or deformations of material do not occur.

In a further development of the invention, an inner diameter of the shell at the level of the indentation is smaller than an inner diameter of the shell at the level of the ground.

In this way, excellent stacking properties can be achieved. The indentation or the stacking shoulder then protrude so far into the interior space that even tolerances can be compensated in the formation of the respective upper cup, that is to say, for example, in the region of its bottom frame, which is used for destacking. Since the area of the overlap is omitted from such a strong indentation, leaks in the overlap area are avoided.

The problem underlying the invention is also solved by a method for producing a cup of paper material with the following steps: forming a flat blank into a substantially conical mantle and connecting the end faces of the blank together in the region of an overlap, inserting a cup-shaped Bodens in the conical jacket, so that the peripheral pot wall of the bottom substantially parallel to the inside of the conical jacket and applying a circumferential indentation in the conical jacket with the recess of the region of the overlap.

By eliminating the area of the overlap when introducing the circumferential indentation, leaks in the region of the overlap can be avoided. The introduction of the circumferential indentation is advantageously carried out before the coat is firmly and liquid-tightly connected to form a bottom frame with the pot wall of the soil. Advantageously, the jacket is merely folded around the lower edge of the top wall of the floor, without there already being a firm connection between the jacket and the cup wall of the floor. Turning over the lower end of the sheath is also referred to as so-called floor rolling and is typically accomplished by moving a trough-shaped punch against the lower edge of the sheath. This leads to a curling of the lower edge by 180 ° and as a result to a turning over of the lower edge of the pot wall of the bottom projecting portion of the shell to the lower edge of the pot wall. Alternatively, the jacket can be connected only to the outside of the pot wall, so that then eliminates a turning of the jacket in its lower region. So before the jacket is firmly and liquid-tightly connected to the ground, displacements and compressions can be compensated and compensated by the introduction of the indentation with the exception of the region of the overlap. The omission of the area of the overlap when forming the embossment or stacking shoulder leads to greater material displacements compared to the formation of a circumferential indentation. This, for example, simply because the shell is shortened in its length where the indentation is formed, where the indentation is not formed, but in the overlap, but its original Length keeps. These increased material shifts may result in paper cups that are no longer uniform in shape, thereby possibly having leaks and, above all, being considered by consumers to be skewed and inferior. Surprisingly, however, with the invention, it is now possible to compensate for these greater material displacements in forming the indentation while omitting the region of the overlap, because the indentation is formed when the jacket has not yet been firmly and fluid-tightly connected to the bottom.

In a further development of the invention, the folding over of the lower region of the conical jacket around the pot wall and the introduction of the circumferential indentation take place essentially simultaneously.

For example, the turning over of the lower region of the conical jacket or the so-called bottom rolling can be achieved by approaching a trough-shaped stamp to the lower end of the jacket. Seen in the direction of the cup, the stamp still has a circumferential ring, which is then driven from the outside against the jacket and forms the indentation with the recess of the region of the overlap. The formation of the indentation can be done by axial displacement of the ring against the conical jacket, but can also be done for example by radial delivery of several stamp. In any case, the ring or the stamp is formed so that the region of the overlap is recessed and in the region of this overlap no indentation or stacking shoulder is formed.

In a further development of the invention, the turning over of the lower region of the conical jacket and the introduction of the circumferential indentation by means of pushing on a stamp on the lower region of the conical jacket takes place parallel to a central longitudinal axis of the conical jacket.

By axially pushing the punch parallel to the central longitudinal axis can also comparatively far into the interior protruding indentations reliably and without damaging the paper material form. Specifically, the paper material of the shell need not be stretched in such a procedure, but folds more or less inward, while at the same time when forming the indentation, the height of the cup between the indentation and the bottom edge of the bottom is shortened. As already stated, this shortening is seen unevenly over the circumference of the cup, since the area of the overlap is omitted. The resulting material shifts within the shell can be compensated by the fact that although the so-called floor rolling or turning of the shell takes place simultaneously with the formation of the indentation, the formation of the bottom frame, with which the jacket then firmly and liquid-tightly connected to the pot wall of the soil is, but only after the formation of the indentation is made.

In a further development of the invention, the liquid-tight pressing of the pot wall of the bottom and the conical jacket is provided after the step of introducing the circumferential indentation.

The problem underlying the invention is also solved by a device for carrying out the method according to the invention, wherein the device comprises a mandrel and a punch for introducing a molding in a conical shell of a cup of paper material, wherein the mandrel extending in the circumferential direction paragraph and the Stamp have an annular portion for forming the indentation, wherein the paragraph interrupted in the region of an overlap on the jacket and / or the annular part of the punch is recessed in the region of the overlap on the jacket.

By interrupting the shoulder on the core mandrel in the region of the overlap, the risk of wrinkling is reduced in this area, ie at the level of the indentation to be introduced and in the area of the side seam / overlap.

Fig. 1

eine erste Schnittansicht eines erfindungsgemäßen Bechers aus Papiermaterial,

Fig. 2

eine zweite Schnittansicht eines erfindungsgemäßen Bechers, wobei die Schnittebene der Fig. 2 gegenüber der Schnittebene der Fig. 1 um 90° um die Mittellängsachse des Bechers gedreht ist,

Fig. 3

eine Ansicht eines erfindungsgemäßen Bechers von oben,

Fig. 4

einen ersten Verfahrensschritt beim Herstellen des erfindungsgemäßen Bechers,

Fig. 5

einen zweiten Verfahrensschritt beim Herstellen des erfindungsgemäßen Bechers,

Fig. 6

einen dritten Verfahrensschritt beim Herstellen des erfindungsgemäßen Bechers,

Fig. 7

einen vierten Verfahrensschritt beim Herstellen des erfindungsgemäßen Bechers,

Fig. 8

eine Draufsicht auf den Stempel, der gemäß Fig. 7 bei dem erfindungsgemäßen Verfahren verwendet wird,

Fig. 9

eine Ansicht des erfindungsgemäßen Bechers nach dem Verfahrensschritt der Fig. 7,

Fig. 10

eine abschnittsweise Ansicht eines Stempels ähnlich Fig. 8 von innen,

Fig. 11

eine Ansicht auf einen Kerndorn, der gemäß Fig. 4 bei dem erfindungsgemäßen Verfahren verwendet wird, von oben,

Fig. 12

eine Ansicht auf die Schnittebene A-A in Fig. 11,

Fig. 13

eine Draufsicht auf einen Ring an dem Kerndorn der Fig. 12,

Fig. 14

eine Ansicht des Rings der Fig. 13 von schräg oben,

Fig. 15

eine Ansicht auf die Schnittebene A-A in Fig. 13 und

Fig. 16

eine vergrößerte Darstellung der Einzelheit X aus Fig. 15.

Further features and advantages of the invention will become apparent from the claims and the following description of preferred embodiments of the invention in conjunction with the drawings. Individual features of the different embodiments shown can be combined in any way with one another without exceeding the scope of the invention. In the drawings show:

Fig. 1

a first sectional view of a cup of paper material according to the invention,

Fig. 2

a second sectional view of a cup according to the invention, wherein the sectional plane of the Fig. 2 opposite the cutting plane of the Fig. 1 rotated 90 ° about the central longitudinal axis of the cup,

Fig. 3

a view of a cup according to the invention from above,

Fig. 4

a first method step in the production of the cup according to the invention,

Fig. 5

a second method step in the production of the cup according to the invention,

Fig. 6

a third process step in the production of the cup according to the invention,

Fig. 7

a fourth method step in the production of the cup according to the invention,

Fig. 8

a plan view of the stamp, according to Fig. 7 used in the method according to the invention,

Fig. 9

a view of the cup according to the invention after the process step of Fig. 7 .

Fig. 10

a section-wise view of a stamp similar Fig. 8 from the inside,

Fig. 11

a view of a core thorn, according to Fig. 4 used in the method according to the invention, from above,

Fig. 12

a view on the cutting plane AA in Fig. 11 .

Fig. 13

a plan view of a ring on the core mandrel of Fig. 12 .

Fig. 14

a view of the ring of the Fig. 13 from diagonally above,

Fig. 15

a view on the cutting plane AA in Fig. 13 and

Fig. 16

an enlarged view of the detail X from Fig. 15 ,

The presentation of the Fig. 1 shows a cup 10 of a paper material according to the invention. The cup 10 is shown in a not yet completed state, since the cup can still be provided, for example, at its upper edge with a mouth roll and, for example, even an outer sheath for isolation and stabilization on the cup 10 can be postponed.

The cup 10 has a generally conical shell 12, which is connected to form a bottom frame 14 with a generally cup-shaped bottom 16. To form the bottom frame 14, a region of the jacket 12 that projects beyond the bottom 16 or its cup wall is folded around the cup wall of the bottom 16 and then the jacket 12 and the bottom 16 are pressed together in the region of this envelope and also glued or sealed together , The bottom 16 and the jacket 12 are thereby firmly and liquid-tightly fixed to each other.

The jacket 12 of the cup 10 is provided with a circumferentially extending indentation 18, which only in the in Fig. 1 right portion of the cup 10 is interrupted. This, in Fig. 1 The area shown on the right forms the region of the overlap 20, in which therefore the end faces of a flat blank, from which the conical jacket 12 is made, overlap and are sealed or glued together. In the presentation of the Fig. 2 This area of overlap 20 is clearly visible.

Also in Fig. 2 It can be seen that the indentation 18 reduces the inner diameter of the jacket 12 and forms a circumferential stacking shoulder, which is recessed or interrupted only in the region of the overlap 20. The indentation 18 runs, see Fig. 2 , adjacent to the region of overlap 20 curved downwards, toward bottom 16. The indentation extends in the direction of the region of the overlap to initially seen in the circumferential direction, and then bent in a circular arc shape until after an angle of 90 °, the indentation then approximately parallel to the region of the overlap 20 and ends at the level of the bottom 16. In the course of this curvature by 90 °, the depth of the indentation 18 decreases in the radial direction and has at the height of the bottom 16 then a depth of approximately zero. This curved course of the indentation 18 is to both Formed sides of the region of the overlap 20 and helps to keep material displacements within the shell 12 by forming the indentation 18 in limits, so that no visible impairment of the geometric truncated cone shape of the shell 12 occurs.

However, since the indentation 18 extends over the entire circumference of the shell 12 except for the area of the overlap 20, it can form a reliable stacking shoulder for similar cups to be stacked. For example, rest on the indentation 18, the bottom roll of an outer jacket, not shown, an upper cup or, for example, the bottom frame 14 of a respective upper cup. The recess of the indentation 18 in the region of the overlap 20 does not impair the stacking properties of the cup 10 according to the invention.

The indentation 18 is formed in the radial direction so strong that an inner diameter at the level of the indentation 18 is less than an inner diameter at the level of the bottom 16. Above the bottom 16 closes in one direction to the opening of the cup 10 to thus an area on, which reduces its diameter slightly until the indentation 18 is reached. Such a strong formation of the indentation in terms of such a clear cross-sectional reduction is not absolutely necessary, but can be made. Alternatively, as viewed from the bottom 16, a cylindrical area may extend as far as the indentation 18, or the area between the indentation 18 and the floor 16 may slightly increase its diameter towards the top.

The presentation of the Fig. 3 shows a view of the cup 10 from above. The cup 10 has its largest diameter at the upper edge of the generally conical shell 12. The interior of the cup 10 is closed at the bottom by the bottom 16. The bottom frame 14 is in the view of Fig. 3 in and of itself can not be seen and the lower edge of the bottom frame 14 is therefore only indicated by dashed lines. The indentation 18 runs, as Fig. 3 can be seen around the entire circumference of the shell 12 except for the area of the overlap 20 um. In the region of the overlap 20, the indentation 18 is not formed, so that no deformation takes place in this area. As Fig. 3 can be seen, seen in the radial direction decreases the depth of the indentation 18 in the direction of the overlap 20 gradually to zero, so that then in the region of the overlap 20 no deformation occurs.

As has been stated, the cup 10 can be provided to its final completion at the top of the shell 12 with a mouth roll and for example, a generally frusto-conical outer shell can be pushed onto the cup 10 and fixed there to improve its insulating properties.

The presentation of the Fig. 4 shows a first process step in the manufacture of the cup 10 of the invention Fig. 1 , The jacket 12 already has the shape of a frusto-conical sleeve and has thus already been produced from a flat, annular segment-shaped state in that its end faces have been overlapped with each other and fixed together. This area of the overlap 20 is in the illustration of Fig. 4 for the sake of clarity not shown. The shell 12 in the form of a frusto-conical sleeve is now pushed onto a mandrel 22, which has a generally frusto-conical shape with the same cone angle as the shell 12. At his in Fig. 4 lower end of the mandrel 22 is provided with a circular cylindrical portion 24, on the front side of the cup-shaped bottom 16 is arranged. The bottom 16 is, for example, by means of negative pressure at the end face of the circular cylindrical portion 24 held. The circular cylindrical portion 24 merges with the formation of a shoulder 26 in the frusto-conical portion of the mandrel 22. The paragraph 26 does not run over the entire circumference of the mandrel 22 and is intended to form an abutment 18 in the formation of the indentation.

The jacket 12 will now according to Fig. 5 pushed on the mandrel 22 until, see Fig. 6 , a pot wall of the bottom 16 abuts parallel to an inner side of the jacket 12. If this state is reached, a two-part punch 28 is moved against the lower end of the shell 12. A first, cup-shaped part 30 of the two-part punch 28 has a groove-shaped recess 32 which is circular and which receives the lower edge of the shell 12 and this deflects or rolls over by 180 °. This results in a turnover of the region of the jacket 12, which is beyond the lower edge of the pot wall of the bottom 16 is about the lower edge of the top wall of the bottom 16. The state of this lower portion of the shell 12 after this so-called floor rolls is the representation of Fig. 7 and the Fig. 9 refer to. As can be seen, the lower portion of the shell 12 is folded around the pot wall of the bottom 16, but is only on the outside of the pot wall at this, whereas on the inside still a distance between the folded portion of the shell 12 and the pot wall of the Floor 16 exists. In this state, as he is in FIGS. 7 and 9 is shown, the bottom 16 can still move slightly relative to the jacket 12.

A second part 34 of the punch 28 is annular and is provided for the formation of the indentation 18. This second, annular part 34 is pushed simultaneously with the cup-shaped, first part 30 from below against the jacket 12, which rests on the mandrel 22. However, an inner diameter of the ring 34 is larger than the outer diameter by about the thickness of the paper material of the shell 12 of the circular cylindrical portion 24 of the mandrel 22 and thereby presses the shell 12 in the radially outwardly of the circular cylindrical portion 24 of the mandrel 22 lying portions inwardly and thereby forms the indentation 18 from. The sliding of the two-part punch 28 takes place in the axial direction parallel to a central longitudinal axis 36 of the shell 12 and the bottom 16. Die Darstellung der Fig. 7 shows the state after the two-piece punch 28 has been completely pushed onto the jacket 12. In this state, the lower edge of the jacket 12 has been turned over by the first, cup-shaped part 30 by 180 ° or rolled over. The second, annular part 34 has the jacket 12 pressed or folded inwards so that the indentation 18 has been formed.

As in the presentation of Fig. 8 can be seen, the inner diameter of the second, annular part 34 in this case an extension 38 which comes to lie on the outer surface 12 of the overlap on the jacket 12 when pushing the second, annular part 34 of the punch 28 radially. This radially outwardly extending recess 38 on the second, annular part 34 of the punch 28 ensures that no deformation takes place in the region of the overlap 20. This is in Fig. 7 to recognize right where in the region of the recess 38 is still a distance between the outside of the shell 12 at the overlap 20 and the inner circumference of the ring 34, so that in the region of the overlap 20, the conical shape of the shell 12 is maintained and causes no deformation becomes.

The representation of FIG. 10 shows schematically a view of a possible embodiment of the recess 38 as viewed from the central longitudinal axis 36. The recess 38 of the annular part 34 from Fig. 8 has straight, substantially perpendicular to the circumferential direction extending side edges. In the alternative embodiment according to FIG. 10, it can be seen that the side edges 40 of the recess 38 are not rectilinear, but extend approximately arcuate curved, with the width of the recess decreases from top to bottom. When pushing on the second, annular part 34 of the punch 28, the indentation 18 thereby receives on both sides of the region of the overlap 20 a downwardly, in the direction of the bottom 16 to a circular arc curved course. In the illustrated embodiment, the side edges 40 extend at a bend angle of 90 ° so that they extend at the lower end of the second portion 34 of the punch 28 approximately parallel to the boundary lines of the region of the overlap 20.

In the presentation of the Fig. 9 the cup 10 is then shown in the state after the two-piece punch 28 has been withdrawn again parallel to the central longitudinal axis 36 of the lower part of the shell 12 and also the mandrel 22 has been removed. In this state, the cup 10 is only partially completed. In order to make the cup 10 liquid-tight, the bottom frame must still be formed by the folded portion of the shell 12 is pressed from the inside against the pot wall of the bottom 16 and the three then mutually parallel layers of the shell 12 and the bottom 16 pressed together , glued and / or sealed. To complete the cup, the upper edge of the shell 12 can then be provided with a mouth roll and, for example, an insulating outer sheath can also be pushed onto the cup 12.

The presentation of the Fig. 11 shows the mandrel 22 in the Fig. 4 to 7 was shown only schematically, in a view from above. The presentation of the Fig. 12 shows a view on the cutting plane AA in Fig. 11 ,

The circular cylindrical portion 24 of the mandrel 22 and the shoulder 26 are formed on a ring 50 which forms the lower end of the mandrel 22. The shoulder 26 does not run over the entire circumference of the ring 50, but is not formed in a partial region of the circumference, wherein this partial region then comes to rest on the sheath 12 in the region of the overlap 20.

Fig. 13 shows the ring 50 in a view from above. In a region 52 of the shoulder 26 is not formed and the ring 50 therefore has in this area a lateral surface corresponding to the portion of a lateral surface of a truncated cone. The section 52 can be clearly seen in the view on the sectional plane AA, which in Fig. 15 is shown. Also, the circular cylindrical portion 24 is interrupted in the area 52. On both sides of the region 52 adjoin transition areas 54, in which the shoulder 26 is formed, but with a rising away from the area 52 depth. A depth of the shoulder 26 therefore increases from the region 52 in both circumferential directions until the shoulder 26 at the end of the region 54 has reached its intended depth, which it then retains over the remainder of the circumference until the transition region 54 again begins. The formation of the region 52 and the transition regions 54 on the ring 50 is also in the illustration of Fig. 14 to recognize. The circular cylindrical region 24 ends at the beginning of the two transition regions 54 and the transition regions 54 form a gradual transition to the region 52. The provision of the region 52 on the mandrel 22 can ensure that the indentation 18 in the region of the overlap 20 is not formed and thereby the in Fig. 2 shown cup formation results.

Based on the presentation of the Fig. 13 It can be seen that the width B1 of the region 52 is approximately as large as the width of each of the transition regions 54. This allows a smooth, gradual transition from the heel 26 and the circular cylindrical portion 24 are secured to the area 52. This gentle, gradual transition in turn ensures that when deforming the paper material of the shell 12 during the formation of the indentation 18 no excessive material tensions occur or the paper material even tears. As stated, the region 52 is in the process step according to FIG 6 and 7 , So the molding of the indentation 18, the recess 38 in the annular portion 34 of the punch 28 opposite.

Claims (13)

1. A cup made of paper material and having a fillable interior, which is formed by means of an at least partially conical tubular wall (12) and a bottom wall (16), wherein said bottom wall (16) is joined to said tubular wall (12) in the region of the lower end of said interior in a substantially liquid-tight manner, wherein said tubular wall (12) is formed from a planar blank, whose end regions are bonded to each other in an overlap region (20), and wherein said tubular wall (12) delimiting said interior comprises at least one deforming entity (18) extending in the peripheral direction, characterized in that said deforming entity (18) is not formed in said overlap region (20).
2. The cup made of paper material according to claim 1, characterized in that said deforming entity (18) extends along the entire periphery of said tubular wall (12) with the exception of said overlap region (20).
3. The cup according to claim 1 or 2, characterized in that said deforming entity (18) has a bent or curved extension in the vicinity of said overlap region (20), wherein said deforming entity (18), as seen in the direction toward said overlap region (20), extends respectively on both sides of said overlap region (20) forming a bend or curve directed toward said bottom wall (16) of said cup (10).
4. The cup according to claim 3, characterized in that said deforming entity (18) extends, in the direction toward the overlap region (20) in relation to an extension in the peripheral region, curved through an angle of 90 degrees directed toward said bottom wall (16).
5. The cup according to claim 3, characterized in that said deforming entity (18) is curved to form an arc of a circle.
6. The cup according to any one of the preceding claims, characterized in that a depth of said deforming entity (18) in the radial direction diminishes in a direction toward said overlap region (20).
7. The cup according to claim 6, characterized in that said depth of said deforming entity (18) diminishes down to zero.
8. The cup according to any one of the preceding claims, characterized in that an inside diameter of said tubular wall (12) at the level of said deforming entity (18) is smaller than an inside diameter of said tubular wall (12) at the level of said bottom wall (16).
9. A method for the fabrication of a cup made of paper material, comprising the following steps: shaping a planar blank to a substantially conical tubular wall (12) and joining the end regions of said blank to each other in an overlap region (20), inserting a pot-type bottom wall (16) into said conical tubular wall (12), so that the peripheral pot-shaped wall of said bottom wall (16) rests against the interior surface of said conical tubular wall, and incorporating a peripheral deforming entity (18) in said conical tubular wall except in said overlap region (20).
10. The method according to claim 9, characterized in that the process of wrapping the lower region of said conical tubular wall (12) around said pot-shaped wall and the process of incorporating said peripheral deforming entity (18) take place substantially simultaneously.
11. The method according to claim 9 or 10, characterized in that the process of wrapping the lower region of said conical tubular wall (12) and the process of incorporating said peripheral deforming entity (18) is carried out by pushing a plunger (28) onto said lower region of said conical tubular wall (12) in parallel to a longitudinal center axis (36) of said conical tubular wall (12).
12. The method according to any of claims 9 to 11, characterized by pressing said pot-shaped wall of said bottom wall (16) and said conical tubular wall (12) together in a liquid-tight manner after the step involving the incorporation of said peripheral deforming entity (18).
13. A device for carrying out the method according to any one of claims 9 to 12, comprising a mandrel (22) and a plunger (28) for the purpose of incorporating a deforming entity (18) in a conical tubular wall (12) of a cup made of paper material, wherein said mandrel (22) includes a step (26) extending in the peripheral direction and said plunger (28) includes an annular portion (34) for the purpose of forming said deforming entity, wherein said step (26) of said mandrel (22) is discontinued in the region that comes to rest on the overlapping (20) of said tubular wall (12) of the cup, and said annular portion (34) of said plunger (28) has a recess in the region (52) of said overlapping (20) on said tubular wall (12), characterized in that transition zones (54) adjoin on both sides of said region (52), in which zones said step (26) is configured with an increasing depth away from said region (52) so that said transition zones (54) form a gradually extending transition to the region (52).

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