EP2080715A1 - Beaker made out of a paper material - Google Patents

Abstract

The cup (1) has a fillable internal space (5) formed by a conical sleeve (2) and a pot-shaped bottom (3). The bottom is attached with a frame (4) to the sleeve in a liquid-tight manner at a lower end of the internal space. The sleeve and/or the bottom in an area of the frame and/or the frame comprises an outwardly projecting widening (10) in an area along circumference of the frame. A lower edge (14) of the widening forms a standing surface for the cup. The frame widens with an inclination angle (beta) in a direction of the lower edge. An independent claim is also included for a method for manufacturing a cup from paper material.

Description

The invention relates to a cup made of a paper material with a fillable interior, which is formed by a conical jacket and a bottom, wherein the bottom is secured at the lower end of the interior with a frame substantially liquid-tight manner on the jacket.

The invention further relates to a method for producing a cup from a paper material, which consists of a conical jacket and a bottom secured in the region of the smaller circumference of the shell by a frame.

A mug of this kind is through the JP2001-192015A State of the art. The frame of the well-known cup widens downwards. The widening serves to fasten an outer jacket which surrounds the jacket bounding the inner space to form a cavity. Since the expansion of the frame, the distance between the inner shell and Defined outer jacket, the expansion of the frame must be circumferential along the circumference. The outer jacket is placed around the frame, turned inwards and fastened there. When attaching the outer shell to the frame, it may happen that the tightness of the frame is impaired. In addition, the attachment of the outer sheath by wrapping is very expensive.

In the known cup, the outer shell completely encloses the frame, so that it is no longer visible from the outside. When driving in and securing the outer jacket from the inside to the frame, therefore, holding back from the outside is no longer possible. The outer jacket can be pressed from the inside only with a very small force, which can accommodate the frame itself. If the pressure force is too high, the frame may tear, on the other hand, the attachment of the outer jacket may be deficient if the pressing force is too low. When connecting the outer shell by heat sealing, it may happen that the seal between the bottom and the inner space bounding shell dissolves again, since the sealing of the inwardly wrapped outer shell no counterpressure on the frame from the outside can be exercised more.

For cups made of paper material, the frame is a very important element of the cup. The frame is necessary for the connection between the jacket and the floor. At the frame are at least two layers of material in the thickness direction to each other, namely the material of the bottom and the material of the inner space bounding shell. Preferably, the bottom is designed cup-shaped, the open side of the filling opening of the cup is remote. The at least two material layers are thus preferably arranged along the wall of the cup-shaped bottom. It can additionally be provided that, for example, the jacket is wrapped around the material of the floor, and that the frame consists of three or more layers of material. The material of the floor is in the range with the material of the coat the frame glued or sealed to be liquid-tight at least for a certain period of time.

The term "paper material" from which the bottom and the jacket are made can be understood as meaning different materials which have at least one layer of paper, cardboard or cardboard. In addition, the material may comprise one or more layers of plastic and / or aluminum. It can also be provided that the paper material is waxed or painted in order to have a resistance to the liquid to be filled into the interior. Preferably, the paper material is at least on the side bounding the interior with a thin plastic layer, preferably made of polyethylene, coated. In contrast to pure plastic material, the moldability and in particular the extensibility of such paper material is limited. Too much deformation, the paper material itself or even a proposed coating tear, so that the tightness is impaired. For cups made of paper material, therefore, the frame is an essential design feature that can not be waived.

The invention is based on the object to simplify the manufacturability of a cup of the type mentioned and to avoid sealing problems on the frame.

The object is achieved in that the jacket and / or the bottom in the region of the frame and / or the frame itself at least in an area along the circumference has an outwardly projecting widening, and that a lower edge forms a base for the cup.

The object is achieved in the method in that the bottom is connected to the jacket to form a frame, wherein during the formation of the frame of the jacket and / or the bottom in the frame and / or the frame itself at least in one area along the periphery is widened outwardly, so that a lower edge of the expansion forms a base for the cup.

The base of the cup is enlarged by the expansion, so that the cup has improved stability. The expansion is not or not completely covered by an outer shell, so that the material of the shell or the floor immediately forms the base. The frame can not be impaired in its tightness by the attachment of the additional material of the outer shell. In a preferred embodiment, the expansion is continuous and uniform along the circumference. When the paper material is coated, it is advantageous to make the expansion only so great that the coating does not tear.

Preferably, the frame is widened over its entire height. The frame then has - seen in an axial section - a substantially constant angle of inclination to the central axis of the cup. In an embodiment, however, it can also be provided that the frame contains different height ranges which have different angles of inclination. In this case, the area of the frame adjoining the bottom can remain in its original form, while the lower edge of the frame is increasingly widened. The upper height range may serve primarily to seal the fillable interior and connects the conical shell substantially liquid-tight to the floor. In this upper height range of the jacket and the wall are sealed or glued together. In the lower height range of the frame, the material of the inner space bounding shell and / or the wall of the floor is expanded and forms with its lower edge an enlarged footprint for the cup. In this height range, a liquid-tight connection between the material of the bottom and the material of the shell is no longer absolutely necessary, so that sealing or bonding in the lower height range can be at least partially eliminated.

The cup of the invention can be used very versatile, since it can be used both without outer sheath and with different outer shells. Preferably, a heat-insulating jacket is provided, which partially surrounds the jacket bounding the interior space to form a cavity. The outer sheath is thereby preferably pushed onto the inner conical jacket limiting the inner space along the central axis and fixed after the frame has been formed and expanded.

The expansion on the frame can be used very advantageously to improve the stacking properties of the cup. A stackable cup is, for example, through the EP 1 227 042 B1 known. The interior of the limiting jacket of the known cup has a first means for holding another cup of the same kind. The known cup has on a outer shell, which surrounds the inner space bounding shell with a heat-insulating cavity, a second means for holding. The second means for holding is formed by an inwardly directed curl mounted at the lower end of the outer shell. When the cup is stacked, the second holding means attached to the outer shell can cooperate with a first holding means attached to a similar cup. Several stacked cups thereby form a sturdy stack with the stacked cups standing securely together but without jamming into each other. Since jamming of the stacked cups is prevented, the cups from the stack can also be separated again very well.

The well-known cup has the disadvantage that the forces occurring during stacking are transmitted via the jacket bounding the interior and over the outer jacket. The forces that must be passed within the cup from the first means for holding to the second means for holding, are first by the interior transferred limiting jacket to the junction between the inner shell and outer shell and passed through this connection point to the outer jacket. In the outer jacket, the forces are then forwarded to the trained as Einrollung second means for holding and transferred there to the next cup. As a result, both the inner shell and the outer jacket must be designed to be stable enough to absorb the forces occurring. In addition, the joint between the outer shell and the inner shell must be designed for the maximum forces occurring.

The design freedom of the cup after the EP 1 227 042 B1 is disadvantageously limited because the attached to the outer jacket second means for holding must always be adapted to the dimensions of the first means for holding another cup of the same kind and to the forces to be transmitted. It is not possible to provide the outer shell with any shape, or to change its shape as desired. In addition, it is not possible to omit, if necessary, the outer shell, without losing the good stacking properties.

In the cup according to the present invention it is provided that on the frame means for holding another cup of the same kind is arranged, which can cooperate in a stacking of the cup with a similar cup. The means for holding is advantageously formed by the expansion. It is preferably provided that a first means for holding is arranged on the jacket bounding the inner space, which can cooperate with a second holding means attached to the widening of a similar cup when stacking the cup.

• Formen wenigstens eines ersten Mittels zum Halten eines anderen Bechers gleicher Art an dem den Innenraum begrenzenden Mantel;
• Formen eines zweiten Mittels zum Halten an der Zarge, das bei einem Stapeln des Bechers mit einem an einem gleichartigen Becher gebrachten ersten Mittel zum Halten zusammenwirken kann.

The stackable cup is preferably made by a process having the following process steps:

• Forming at least a first means for holding another cup of the same kind on the casing defining the interior space;
• Forming a second means for holding on the frame, which can cooperate in a stacking of the cup with a brought to a similar cup first means for holding.

The second means for holding is arranged on the jacket bounding the interior or on the floor or on a frame, by which the jacket bounding the interior is connected to the floor. In any event, the second means for holding is attached to a component of the cup that is in contact with the fillable interior.

The cup according to the invention has the advantage that it can be stacked safely and stably even without the presence of an outer jacket and can also be unstacked again without jamming. If it is provided to associate the cup with a heat-insulating outer jacket, it can be largely independent and free from the cup of the EP 1 227 042 B1 design existing restrictions. The forces occurring during stacking are forwarded only within the jacket delimiting the interior from the first means for holding to the second means for holding. An outer jacket is therefore not absolutely necessary. If, nevertheless, an outer sheath is to be present, then this is not claimed by the forces occurring during stacking. The frame, by which the jacket bounding the interior space is connected to the floor, is a very stable part of the cup and is particularly well suited for absorbing forces. The forces occurring during stacking are essentially transferred by the jacket bounding the inner space from the first means for holding onto the second means for holding, which can be formed by the widening on the frame. This makes it possible to form very stable stacks with a large number of cups, which do not then become wedged into one another when the stacks are exposed to shocks or, for example, jerkily set down on the ground. The interior limiting coat and the ground are already strong enough to absorb the forces occurring during stacking, since they must also absorb the forces occurring during filling.

In order to prevent jamming of several cups during stacking, it is advantageous that the dimensions of the second means for holding are adapted to the dimensions of the first means for holding another cup of the same type. The first means for holding another cup of the same kind can be formed in any desired manner. It is essential that a contour is formed, the forces acting in the axial direction of the cup forces, so the forces acting when stacking between two cups record. The first means for holding is preferably designed as a bead or rib, which is formed at least in a region along the circumference in the inner space bounding shell. The bead or rib can be designed along the circumference continuously or with interruptions.

Now, if it is provided in an embodiment of the invention that the cup has a heat-insulating outer shell, while the design of the heat-insulating outer shell is arbitrary in itself. The outer sheath can be made for example of a plastic-paper or composite material. To improve the insulation effect, the outer sheath can also be corrugated, corrugated, embossed or provided with a foamed layer. The outer sheath can also be designed as a multilayer, for example, a corrugated intermediate layer can be provided, which is covered by a smooth overlying outer layer. The fact that the cup according to the invention can be stacked independently of the outer shell, one and the same inner cup can be combined in a simple and almost arbitrary manner with a variety of outer shells. Without changing the shape and dimensions of the inner cup or of the components forming the fillable interior, different cups with different visual and haptic appearance can be created, since the appearance that the user of the cup perceives mainly determined by the design of the outer shell.

• Formen wenigstens eines ersten Mittels zum Halten eines anderen Bechers gleicher Art an dem den Innenraum begrenzenden Mantel;
• Formen einer aufgeweiteten Zarge und Verpressen von dem den Innenraum begrenzenden Mantel und dem Boden;
• Formen eines zweiten Mittels zum Halten an der Zarge, das bei einem Stapeln des Bechers mit einem an einem gleichartigen Becher angebrachten ersten Mittel zum Halten zusammenwirken kann;
• Aufschieben eines hülsenförmig vorgeformten Außenmantels auf den den Innenraum begrenzenden konischen Mantel in axialer Richtung;
• Fixieren des Außenmantels an dem den Innenraum begrenzenden Mantel.

In a method for producing a double-walled cup, the following method steps are advantageously carried out:

• Forming at least a first means for holding another cup of the same kind on the casing defining the interior space;
• Forming a flared skirt and crimping the shell bounding the interior and the bottom;
• Forming a second means for holding on the frame, which can cooperate in a stacking of the cup with a mounted on a similar cup first means for holding;
• Sliding a sleeve-shaped preformed outer shell on the inner space bounding conical jacket in the axial direction;
• Fixing the outer shell to the inner space limiting coat.

The fixing of the outer shell to the inner cup can be done for example by sealing or gluing. It causes a secure connection between the outer shell and the inner space bounding shell, so that slipping of the outer shell is reliably prevented, even if the outer shell has only a small amount.

In order to achieve a good external appearance of the cup, it is advantageous that the outer casing ends below the first means for holding another cup of the same kind or even below the bottom. The attached to the inner sheath first means for holding is thereby covered by the outer sheath and is no longer visible from the outside. Furthermore, it is advantageous that the outer shell ends above the expansion of the frame.

Preferably, the expansion on the frame by an interaction of a arranged outside and inside the frame tool done. The expansion can be formed very precisely.

The widening is advantageously widened so far outwards that a parallel to the inner wall bounding the casing extends at a certain distance outside of the jacket defining the inner space, at the lower edge of the widening. In order for an intended outer jacket does not hinder the stacking of the cup, it is advantageous that the outer contour of the outer shell is within the parallels with the jacket bounding the inner space, which is applied to the expansion of the frame.

Further advantages and features of the invention will become apparent from the claims and the following description of some embodiments in conjunction with the figures. Individual features of the different embodiments shown and described can be combined in any way, without exceeding the scope of the invention.

• Figur 1 einen erfindungsgemäßen Becher im Längsschnitt,
• Figur 2 eine Ansicht ähnlich Figur 1 auf zwei gestapelte Becher,
• Figuren 3 A bis C schematisch und nur teilweise dargestellte Längsschnitte auf unterschiedliche Ausgestaltungsformen im Bereich der Zarge von erfindungsgemäßen Bechern,
• Figur 4 und 5 Ansichten ähnlich Figur 1 auf teilweise dargestellte Becher unterschiedlicher Ausgestaltung, bei denen verschiedene Außenmäntel vorgesehen sind,
• Figur 5A eine vergrößerte Ansicht auf eine Variante der Figur 5,
• Figur 6 einen Längsschnitt eines Bechers im Bereich der Zarge beim Einschlagen des Mantels und beim Formen eines Mittels zum Halten eines anderen Bechers,
• Figur 7 eine Ansicht einer Variante der Figur 6,
• Figur 8 einen Längsschnitt durch die Zarge eines erfindungsgemäßen Bechers mit einem Innenwerkzeug und einem Außenwerkzeug zum Verpressen der Zarge,
• Figur 9 und 10 einen teilweise dargestellten Außenmantel des Bechers der Figur 5 in unterschiedlichen Herstellungsschritten.

Show it:

• FIG. 1 a cup according to the invention in longitudinal section,
• FIG. 2 a view similar FIG. 1 on two stacked cups,
• Figures 3 A to C schematically and only partially shown longitudinal sections on different embodiments in the frame of cups of the invention,
• FIGS. 4 and 5 Similar views FIG. 1 partly illustrated cups of different design, in which different outer shells are provided,
• FIG. 5A an enlarged view of a variant of FIG. 5 .
• FIG. 6 a longitudinal section of a cup in the region of the frame when turning the jacket and when forming a means for holding another cup,
• FIG. 7 a view of a variant of FIG. 6 .
• FIG. 8 a longitudinal section through the frame of a cup according to the invention with an inner tool and an outer tool for pressing the frame,
• FIGS. 9 and 10 a partially illustrated outer shell of the cup of FIG. 5 in different production steps.

The in FIG. 1 Cup 1 shown essentially consists of a conical shell 2 and a cup-shaped bottom 3. The open side of the cup-shaped bottom 3 is arranged so that it faces away from the filling opening of the cup 1. The bottom 3 is connected with its wall 31 in the region of the smaller circumference of the shell 2 liquid-tight with this by forming a frame 4. In the region of the frame 4, the material of the jacket 2 is wrapped around the wall 31 of the bottom 3 and hammered inwards. The jacket 2 and the bottom 3 form a fillable interior 5 of the cup 1. The fillable interior 5 has a height A. The inner space 5 delimiting shell 2 has at its upper edge, ie in the region of the larger circumference, an outwardly beaded mouth roll 6, which surrounds the filling opening.

The property "conical" of the shell 2 is understood to mean that the shell 2 in the in FIG. 1 shown longitudinal section of the mouth roll 6 to the bottom 3 at least partially tapers. Of the In this case, casing 2 has an angle of inclination α to the center axis 13 of the cup 1 in the region of the fillable interior 5 above a bead 8. Below the bead 8, the jacket 2 then has up to the bottom 3 a circular cylindrical shape. It is irrelevant which shape of the jacket 2 has in cross section. The jacket 2 is preferably circular in cross-section, but may alternatively also be, for example, oval or rectangular with rounded corners. The cup 1 has a truncated cone-like shape in the case of a round cross-section of the conical shell 2, while in the case of a rectangular cross-section of the conical shell 2 it has a rather truncated pyramidal shape.

The frame 4 has at least in an area along its circumference an outwardly projecting widening 10. By widening is to be understood that the frame 4 is issued with respect to a circular cylinder about the central axis 13 to the outside, so that the frame 4 includes a down to the footprint expanding cross-sectional area. A lower edge 14 of the expansion 10 on the frame 4 forms the base for the cup 1. The cup 1 is in use on its footprint, which is increased by the expansion 10. As a result, tilting of the cup 1 is difficult. The widening 10 is preferably designed circumferentially along the circumference of the frame 4.

The outwardly extending widening 10 also forms a means 9 for holding another cup 1 'of the same kind, which can cooperate with a stacking of the cup 1 with a similar cup 1'. The stacking of the cup 1 in a similar cup 1 'is in FIG. 2 shown. The widening 10 as a means 9 for stacking the cup 1 can cooperate, for example, with a jacket 2 'bounding the interior 5'. Other means of stacking are not essential.

Preferably, the jacket 5 delimiting the inner space 5 has at least one first means 7 for holding another cup 1 of the same type, which in itself can be arbitrarily shaped. It is important that the first means 7 for holding has at least one contour which can absorb forces acting in the direction of the central axis 13 of the cup 1, ie forces which act on stacking between two cups. The first means 7 for holding can be formed for example by a rib or bead 8, which projects into the interior of the cup 1. On the frame 4, on which the inner space 5 bounding jacket 2 is herumgebördelt around the cup-shaped deep-drawn bottom 3 and sealed liquid-tight, said second means 9 is arranged in the form of the expansion 10.

The dimension Y of the second means 9 for holding is adapted to the dimension X of the first means 7 for holding the other cup 1 'of the same kind. In the case of a circular cross-section of the cup 1, the dimension X of the first means 7 for holding the inner diameter of the shell 2 corresponds to the bead 8. The dimension Y of the second means 9 for holding corresponds to the largest outer diameter of the expansion 10 on the frame 4, ie the diameter enclosing the expansion 10. The adaptation of the dimensions X and Y advantageously takes place in such a way that the dimension Y is chosen to be slightly smaller or at most the same size as the dimension X.

The cooperation of the first means 7 and the second means 9 for holding is applied to the in FIG. 2 shown cups 1 and 1 'clearly. The first means 7 'of the cup 1' attached to the jacket 5 'delimiting the interior 5' accommodates the second means 9 of the cup 1. The attached to the frame 4 of the cup 1 expansion 10 and especially the lower end of the expansion 10, so about the footprint at the bottom 14, relies on the bead 8 ', which is formed in the shell 2'. By said adjustment of the dimension X of the first means 7 for holding to the dimension Y of the second means 9 for holding ensures that the expansion 10 of the cup 1 stable and secure on the bead 8 'of the similar cup 1' stands up, but without jamming in the conical jacket 2 '. The forces that occur when stacking along the central axis 13, for example, the weight forces of the cup 1 and possibly even stacked cups are safely taken up by the bead 8 'as a means 7' for holding and the coat 2 'to the bottom 14 'of the frame 4' of the lower cup 1 'forwarded and discharged from the lower edge 14' located standing surface to the ground. Even if very high forces occur in the direction of the central axis 13, an easy removability of the cup 1 or 1 'during unstacking is ensured.

In order to achieve a sufficiently large expansion 10 with a correspondingly large dimension Y, without impairing the tightness of the shell 2, it is advantageous if the height of the expansion 10 - as in FIG. 1 recognizable - extends substantially over the entire height B of the frame 4. In axial section of FIG. 1 seen, the frame 4 has a constant inclination angle β to the central axis 13 of the cup 1. The inclination angle β of the height range B of the frame 4 is in each case directed so that the frame 4 widens toward the lower edge 14 and at its lower edge 14 has the largest dimension Y, ie seen parallel to the central axis 13 of the lower edge 14th the frame 4 forms the furthest from the central axis 13 region of the frame 4. Compared to the inclination angle α of the shell 2 in the region of the inner space 5, the inclination angle β is directed so that the conicity runs in the opposite direction.

The diameter Y enclosing the widening 10 is preferably larger than the diameter D enclosing the region of the base 3 which is in contact with the interior 5. In order for effective stacking to be possible and the stack height not unnecessarily high, it is advantageous if the means 7 for holding the jacket 5 delimiting the inner space 5 are arranged not higher above the base 3 than one third of the height A of the inner space 5 , Even if is dispensed with the means 7 and the expansion 10 is supported directly on the conical portion of the shell 2, the expansion 10 surrounding diameter Y is preferably smaller than a the inner contour of the shell 2 enclosing diameter at a height above the bottom 3 of about one Third of the height A.

The rib or bead 8 can be embossed or rolled by molding tools which are delivered to the shell 2 in the axial or radial direction of the cup 1. The diameter of the first means 7 for holding another cup 1 'of the same type W, that is the inner diameter W of the bead 8, is about the same size as that of the inner space 5 coming into contact region of the bottom 3 enclosing diameter D. Der den Inner space 5 limiting jacket 2 is characterized thereby between the first means 7 for holding and the bottom 3 is substantially cylindrical.

The widening 10 on the frame 4 can be formed for example by a conical mandrel which is delivered to the frame 4 from the bottom. Optionally, the frame 4 may be heated to form the expansion 10. Since a mold which makes a sliding movement relative to the surface of the frame 4 can very easily lead to wrinkling, it may also be advantageous to form the expansion 10 by means of a rolling tool or a radially expanding tool. It may be advantageous to deliver a correspondingly shaped counter-tool to the outer circumference of the frame 4 in order to support the formation of the widening 10. A particularly advantageous method for producing the cup 1 is described below with the aid of FIGS. 6 to 8 will be explained in more detail.

In FIG. 3 are shown in the individual representations A to C in schematic form different design options of the cup 1 in the frame 4. In the variants of the remaining figures, the frame 4 is always formed by three layers of material, namely two layers of material of the shell 2, which surround the wall 31 of the cup-shaped bottom 3 inside and outside formed. This embodiment is very often advantageous, but is not mandatory to implement the present invention. For certain requirements, the variants described below may also be advantageous.

In FIG. 3A it is provided that the material of the bottom 3 is turned over and surrounds the material of the shell 2. The lower edge 14 of the expansion 10, which forms the base for the cup 1, is in this case formed by the material of the bottom 3.

In FIG. 3B an embodiment is shown in which the frame 4 is formed only by two layers of material. The material of the shell 2 and the wall 31 of the bottom 3 both end at the lower edge 14 and thereby form the footprint.

In the FIG. 3C an embodiment of the frame 4 of the cup 1 is shown, in which the frame 4 in the height range B has different inclination angle to the central axis 13. Depending on the height B of the frame 4 and the desired dimension Y of the widening 10, it may be sufficient to provide only a portion within the height range B with a widening 10. The remaining area may for example be substantially cylindrical, so that the frame 4 runs there approximately parallel to the central axis 13. For small widenings 10, it may also be sufficient that the jacket 2 in the upper region of the frame 4 continues the inclination angle α of the jacket 2 in the region of the interior 5 unchanged.

Although it is in the FIGS. 1 to 3 is not shown, it may be advantageous to assign the cup 1 an outer sheath which surrounds the inner space 5 limiting sheath 2 preferably to form a cavity. So that the stacking of the cup 1 is not impaired, it may be advantageous for the outer contour of the outer casing to be is located within a parallel 15 to the inner space 5 limiting sheath 2, wherein the parallel 15 is applied to the expansion 10 of the frame 4. As long as an outer sheath is located within the space 16 between the parallel 15 and the sheath 2 bounding the inner space 5, the stacking properties of the cup are in no way affected. The freedom of design is therefore unlimited. In addition, it is possible to provide a common embodiment of the cup 1 with different outer shells, without having to change the first means 7 for holding and the second means 9 for holding. Below are with the help of FIGS. 4 and 5 some possible embodiments for such outer shells described.

The in the FIGS. 4 and 5 Each of the cups 1 shown has a heat-insulating outer jacket 17, which partially surrounds the jacket 2 delimiting the interior 5, forming a cavity 18. Such cups are also referred to as double-walled insulating cup, in which the located inside the outer shell 17 shell 2 in conjunction with the bottom 3 can also be referred to as "inner cup". The first means 7 for holding another cup 1 'of the same kind and the second means 9 for holding are analogous to those in FIG FIG. 1 designed variant, so that can be dispensed with a repeated description.

The outer jacket 17 of in FIG. 4 Cup 1 shown is arranged substantially parallel to the inner space bounding jacket 2. Die Mantel 2 ist mit dem Gehäuse 2 verbunden. The outer shell 17 has at an upper and at a lower end in each case an inwardly directed curl 19 and 20 and is supported by the curls 19 and 20 on the inner space 5 bounding shell 2 from. It can be provided that the outer jacket 17 is fixed in the region of the curl 19 and / or 20, for example by gluing. The curl 20 is supported in the region of the frame 4 and thus below the horizontal bottom 3 of the inner cup on the inner shell 5, whereby the outer sheath 17 is very stable. At the same time, the outer shell 17 also conceals the first means 7 for holding, so that it is not recognizable from the outside. The curl 20 has a parallel to the outer shell 17 extending portion 23. The region 23 extends close to the inside of the outer shell 17 and can also rest there. By extending parallel to the outer shell 17 area 23, the sliding of the outer shell 17 is simplified to the shell 2, since the outer shell 17 can not stick to the frame 4.

In FIG. 5 has the interior 5 limiting jacket 2 in the area below the mouth roll 6 on a sudden change in size in the form of a shoulder 21, which is seen from the bottom 3 to the mouth roll 6 represents a sudden cross-sectional widening. The outer shell 17 is in the area between the mouth roll 6 and the shoulder 21 with the inner space 5 bounding jacket 2, for example by sealing or gluing, connected. At its lower end, the outer jacket 17 has an inwardly directed curl 20, which likewise has a region 23 extending parallel to the outer jacket 17. The curl 20 is supported below the bottom 3 on the frame 4. The curl 20 is in contrast to FIG. 4 flattened and slightly compressed at the lower edge region 24 of the outer shell 17, so that there is a greater conicity of the outer shell 17 is present.

Deviating from the presentation of FIG. 5 can the cup 1 in the region of the shoulder 21 also be designed differently. An advantageous variant in the region of the shoulder 21 is in FIG. 5A shown greatly enlarged. The area of the inner space 5 limiting shell 2, which lies between the mouth roll 6 and the shoulder 21 and in FIG. 5A designated by the reference numeral 25, in contrast to the illustration after FIG. 5 a different angle of inclination to the central axis 13 than the rest of the jacket 2. In FIG. 5A the region 25 of the casing 2 extends between the mouth roll 6 and the shoulder 21 approximately parallel to the central axis 13. Thus, the outer shell 17 can be pushed a little under the mouth roll 6 when pushed onto the inner cup 1, the upper edge portion 26 of the outer shell 17 is slightly compressed. The edge region 26 thus does not continue the conical outer jacket 17 uniformly, but has a somewhat smaller diameter. If the outer jacket 17, as in FIG. 5A , shown with its upper edge a little inserted into the mouth roll 6, the result is a particularly good appearance of the cup 1, since the upper edge of the outer shell 17 is no longer visible. If the outer sheath 17 is inserted further into the mouth roll 6 in an unillustrated embodiment, the clamping of the outer sheath 17 by the material of the mouth roll 6 causes a fixation of the outer sheath 17. For certain applications, the clamping of the outer sheath 17 in the mouth roll 6 as only attachment of the outer jacket 17 may be sufficient.

The bead 8 of the first means 7 for holding the cups is adapted to the dimension Y of the second means 9 for holding another cup 1 'of the same kind. If the dimensions X and Y in the cups 1 of FIGS. 4 and 5 are identical to the different outer shells 17, all these cups 1 can be stacked in any combination with each other without jamming, since all outer shells 17 are within the space 16 between the parallel 15 and the interior 5 forming shell 2. To vary the optical and haptic perception of the cup 1, the outer side 22 of the outer shells 17 may have different structures. The outer side 22 may, for example, be corrugated, embossed, corrugated or have a foamed coating. It can also be provided to carry out the outer jacket 17, for example, corrugated and additionally provide on the outer side 22 a smooth cover of the wave structure in the form of another jacket to further improve the insulating effect of the cup 1.

The design of the outer shell 17 with an upper curl 19 or the attachment of the outer shell 17 in the region of a shoulder 21 of the shell 2 have the advantage that even in a region just below the mouth roll 6, a very wide cavity 18 between shell 2 and outer shell 17th arises, which has a very high insulation effect. The curl 19 or the shoulder 21 ensure even without additional means, such as foamed layers or corrugated layers within the cavity 18, that the distance between the jacket 2 and outer shell 17 is not reduced under pressure, for example by a cross-hand, and the Isolation effect is lost.

In the manufacture of a cup 1 according to Fig. 1 First, a conical outer shell 2 and an approximately cup-shaped bottom are formed. As in the presentation of Fig. 6 can be seen, the outer shell 2 has initially the shape of a conical sleeve and the bottom 3 has the shape of a truncated cone, which tapers parallel to the outer sleeve 2. In the in Fig. 6 shown state, the bottom 3 and the outer shell 2 are not yet connected to each other, but only inserted into each other. The outer casing 2 is attached to a mandrel 30, which has a frustoconical shape in a first region 29, in which, however, adjoins the tapered end of the frusto-conical portion 29, a further frusto-conical surface 32, which tapers more and the shaping the bead 8, see Fig. 1 , is provided. The surface 32 is followed by a circular cylindrical region 33, at the free end of the bottom 3 abuts. A diameter E of this circular cylindrical region 33 may be smaller, in particular about 0.5 mm smaller than the diameter D of the bottom, see also Fig. 1 , Since the bottom 3 and the outer shell 2 are not yet connected to each other by sealing or gluing, the outer shell 2 can be compressed slightly more to form the bead 8, as would be possible with already sealed jacket 2 and bottom 3. Since the coat 2 as well as the bottom 3 off coated paper material, the bottom 3 can be at least slightly compressed. It is thereby possible to draw the bead 8 relatively far into the interior of the cup in order to ensure a safe stacking of several cups.

Surprisingly, it is even possible to further draw the bead 8 beyond the diameter D of the ground into the interior. On the finished cup 1 would then connect to the bead 8 in the direction of the bottom 3 to a frusto-conical area in this case, but the taper would be reversed to the rest of the jacket 2, which therefore widens again from the bead 8 to the bottom 3.

To form the bead 8 is next to the mandrel 30, a mold 34, the in Fig. 6 is shown, and in the direction of the arrow 35 upwards, to be driven towards the mandrel 30. The molding tool 34 has a frustoconical surface 36, which corresponds in its conicity substantially to the surface 32 on the mandrel 30. The outer sleeve 2 is thus clamped between mandrel 30 and mold 34 and between the surfaces 32 and 36, the bead 8 is formed.

At the same time, the lower end 37 of the shell 2 is turned over with the forming tool 34, so that it is the in Fig. 6 Dashed line position occupies. For this purpose, the molding tool 34 has a channel-shaped region 38, which in the sectional view of the molding tool 34 in FIG Fig. 6 is shown only in sections, but extends over 360 °. The simultaneous turning over of the lower edge 37 of the shell 2 with the molding of the bead 8 facilitates the production of the cup according to the invention considerably.

The jacket 2 is wound from a circular segment over a mandrel and then glued or sealed along a longitudinal seam. To the turning of the lower edge 37 of the shell 2 by means of the molding tool 34, the longitudinal seam of the shell 2 in the region of the lower end 37 can not be glued or sealed. This area is in the representation of Fig. 6 denoted by F. If the longitudinal seam in the area F is not glued or sealed, the sheath 2 can deform more freely when the lower end 37 is folded over, and corrugation of the paper material, which in principle is difficult to deform, is avoided. The region F may extend from the lower edge 37 of the shell 2 even to the lower edge of the bottom 3, as in FIG Fig. 6 also indicated by the reference numeral F '. The length F or F 'is thus variable and can be changed.

Subsequent to the molding of the bead 8 and the turning over of the lower end 37 of the shell 2, the bottom 3 is connected to the shell 2 to the frame 4 for completing the inner cup 1. This is done with the help of an outer ring and an inner tool, wherein at the same time the frame 4 is expanded when connecting the bottom 3 with the jacket 2, so that the in Fig. 1 shown, to the lower edge 14 towards expanding shape of the frame 4 results. This is still based Fig. 8 explained.

The presentation of the Fig. 7 shows a further embodiment of the invention, wherein, in contrast to the embodiment of Fig. 6 the shell 2 'has an initially conical shape, which then merges with the horizontal bottom 3' but into a cylindrical shape. Consequently, the bottom 3 'in this embodiment, a reverse pot shape with cylindrical circumferential wall 31. Both the design of the mandrel 30 and the mold 34 but are to the already explained shape according to Fig. 6 identical. Due to the cylindrical preforming of the peripheral wall 31 of the bottom 3 'and the likewise cylindrical preforming of the lower portion of the shell 2', wrinkling is reduced when the lower edge 37 'of the shell 2' is turned over and during subsequent expansion and forming of the frame 4.

Starting from the in Fig. 7 Dashed state shown with folded lower edge 37 of the jacket 2 'remains with the bottom 3' on the mandrel 30 and after removal of the mold 34, an outer ring 38 is moved into the area below the bottom 3 '. One, the shell 2 'facing inner surface of the outer ring 38 is exposed to the outside and has the angle that the frame 4 should take in the final state. Opposite the outer ring 38 a plurality of inner jaws 39 are provided, wherein in the illustration of Fig. 8 only an inner jaw 39 is shown. The inner jaws 39 can in the representation of Fig. 8 outwardly, are moved in the direction of the outer ring 38 and thereby press the folded edge 37 'against the wall 31 of the bottom 3' and against the inner surface of the outer ring 38th

For example, either only the jaws 39 or the ring 38 or both the inner jaws 39 and the outer ring 38 are heated, so that simultaneously with the widening of the cup-shaped wall 31, the three then superposed layers of material are settled together and thereby form the frame 4. A radially outwardly facing surface of the inner jaw 39 is arranged parallel to the inner surface of the outer ring 38 and also has the angle at which the frame 4 should be arranged in the final state,

The inner jaws 39 are for example part of a mandrel and can be moved by moving an in Fig. 6 not shown middle part are moved radially outward. The outer ring 38 may be formed as a solid ring or, for example, as an openable ring to facilitate the sliding onto the shell 2 '. Instead of a plurality of inner jaws 39, for example, a circumferential roller may be provided, which exerts a radially outward, in the direction of the outer ring 38 directed force on the edge 37 'and the wall 31 to the Frame 4 to form. During the formation of the frame 4, the cup remains on the mandrel 30th

After forming the frame 4, the inner cup 1 is completed and can be removed from the mandrel 30.

On the thus finished inner cup 1 will then, see Fig. 4, Fig. 5 , an outer jacket 17 pushed. This takes place in such a way that the outer casing 17 is received in a ring-like outer tool and then extends through the tapered end of the outer shell 17, a pilot mandrel with a suction head therethrough. This suction head engages an inner cup 1 from below at the bottom 3, sucks on this and pulls it into the tapered outer shell 17 into until the in the 4 and 5 shown state is reached.

For the production of the outer jacket 22, this is first wound from a circular segment-shaped blank on a mandrel and connected to a frusto-conical sleeve. In the area of the lower, tapered end is then according to Fig. 9 initially a curl 40 vorgefomt. This curl 40 represents a precursor of the curl 20, as shown in the 4 and 5 is shown. For the production of in Fig. 5 The cup 40 is then flat pressed until the in Fig. 10 shown form of curl is reached. It will be appreciated that the lower edge of the outer shell 17, formed by the curl 20, is slightly retracted and therefore has a greater taper at the lower end, as previously discussed. In the presentation of the Fig. 10 is on the inside of the curl 20 a knurling or ribbing 41 indicated. Such a knurling or corrugation 41 on the inside of the curl 20 can be provided to achieve a higher elasticity when pushing the outer sheath 17 on the inner cup 1.

As already in the representation of the Fig. 5 can be seen, namely, an inner diameter V of the curl 20 is smaller than an outer diameter Y, see Fig. 5 of the frame 4. When sliding the outer jacket 17, the end of the outer jacket 17 with the curl 20 must therefore expand slightly in order to be pushed over the frame 4 can. This expansion is facilitated by the knurling or ribbing 41. In addition, the longitudinal seam of the outer shell 17 may not be glued or sealed in the region of the curl 20. Thereby, a certain rising of the outer shell 17 in the region of the curl 20 is facilitated, so that the outer shell 17 can be pushed over the frame 4 and then contracts again, so that the curl 20 in the in Fig. 5 shown position on the outside of the frame 4 rests.

It is further noted that a diameter U at the upper end of the curl 20 is greater than the outer diameter Y of the frame 4. This is also Fig. 5 , refer to. Thus, since the inner diameter of the outer shell 17 at the upper edge of the curl 20 is greater than the outer diameter Y, this upper edge of the curl 20 can not get caught on the frame 4 when pushed onto the frame 4. Instead, the frame 4 runs on the slope, which is formed by the inside of the curl 20 and the further extension of the outer shell 17, this is widened, slips over the area with the largest diameter Y of the frame 4 away and then takes the in Fig. 5 shown position. Obviously, the outer sheath 17 is then held by the residual stress on the inner cup 1, since to remove the outer shell 17 this would have to be pulled over the conically widening frame 4 again.

It should be expressly understood that the different configurations of the outer shells 17 and other design means of the cup 1 such as the bead 8 or the shoulder 21 can be combined as desired with each other, and not on the illustrated Variants are limited. It should also be noted that the illustrations are not to scale. For reasons of better visibility, the sizes of the expansion 10 and the angle of inclination of the frame 4 are shown reinforced.

Claims (17)

Cup (1) made of a paper material with a fillable interior (5), which is formed by a conical jacket (2) and a bottom (3), wherein the bottom (3) at the lower end of the interior (5) with a frame ( 4) substantially liquid-tight on the jacket (2) is fixed, characterized in that the jacket (2) and / or the bottom (3) in the region of the frame (4) and / or the frame (4) itself at least in one area along the periphery has an outwardly projecting widening (10), and that a lower edge (14) of the widening (10) forms a standing surface for the cup (1). Beaker according to claim 1, characterized in that the frame (4) - seen in an axial section - an inclination angle (β) to the central axis (13) of the cup (1), wherein the frame (4) with the inclination angle (β ) widens in the direction of the lower edge (14). Cup according to claim 1 or 2, characterized in that the frame (4) comprises a means (9) for holding, which can cooperate in a stacking of the cup (1) with a similar cup (1 '). Beaker according to claim 3, characterized in that a first means (7) for holding is arranged on the jacket (2) delimiting the interior (5), which in a stacking of the beaker (1) with a similar cup (1 '). ) mounted second means (9 ') for holding together. A cup according to claim 4, characterized in that the first means (7) for holding another cup (1 ') of the same kind is designed as a rib (58) or bead (8; 48; 68; is formed in a region along the circumference in the jacket (2) bounding the interior (5). A cup according to claim 4 or 5, characterized in that the diameter (W) enclosing the first means (7) for holding another cup (1 ') of the same type is about the same size as that in contact with the internal space (5) of the bottom (3) enclosing diameter (D). Cup according to claim 6, characterized in that the jacket (2) bounding the interior (5) is substantially cylindrical between the first holding means (7) and the bottom (3). Cup according to one of claims 1 to 7, characterized in that the cup (1) has an outer casing (17). Cup according to claim 8, characterized in that a conical outer casing (17) in an edge region has an inwardly directed curl (20) which has a substantially parallel to the outer casing (17) extending region (23). A method for producing a cup from a paper material consisting of a conical mantle and a bottom inserted in the region of the smaller circumference of the mantle, characterized in that the bottom is connected to the mantle to form a frame, wherein during the formation of the frame Shell and / or the bottom in the region of the frame and / or the frame itself is widened outwardly at least in a region along the circumference, so that a lower edge of the expansion forms a base for the cup. A method according to claim 10, characterized in that the soil during connection to the jacket to form the frame by an inner tool and an external tool are pressed. A method according to claim 10 or 11, characterized in that - before pressing the frame - an edge of the jacket is wrapped inwardly around the wall of the cup-shaped bottom and in the same process step, a first means for holding another cup of the same kind at the Interior bounding coat is formed. A method according to claim 12, characterized in that the sheath bounding the inner space is deformed substantially cylindrically to form the means for holding above the ground. Method according to one of claims 10 to 13, characterized in that an outer jacket is pushed onto the inner space bounding the conical jacket and fixed. A method according to claim 14, characterized in that - after forming a flared frame - a sleeve-shaped preformed outer sheath is pushed in the axial direction on the inner space bounding conical jacket. A method according to claim 15, characterized in that the sleeve-shaped preformed outer sheath - when pushed onto the inner space bounding the conical jacket - at least in one area has a diameter which is smaller than an outer dimension of the expansion of the frame. Method according to one of claims 10 to 16 for producing a stackable cup, characterized by the following method steps: - forming at least a first means for holding another cup of the same kind on the inner space bounding shell; - Forming a widened frame and pressing of the inner space bounding shell and the bottom; - Sliding a sleeve-shaped preformed outer shell on the inner space bounding conical jacket in the axial direction; - Fix the outer shell to the inner space bounding jacket.

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