WO2004002277A2

WO2004002277A2 - Container, in particular for serving, storing and transporting food, in addition to a suitable individual tray and a suitable system for distributing said food

Info

Publication number: WO2004002277A2
Application number: PCT/EP2003/006707
Authority: WO
Inventors: Robert Pappler
Original assignee: Robert Pappler
Priority date: 2002-06-26
Filing date: 2003-06-25
Publication date: 2004-01-08
Also published as: AU2003245988A1; WO2004002277A3

Abstract

The invention relates to a container, an individual tray, in addition to a system for distributing food, which permits ease of handling during transport and distribution. To achieve the latter, each individual tray comprises a connecting body which holds together and seals the lid part, individual tray and also the base part.

Description

description

Container, in particular for dishes for serving, storage and transport, as well as a suitable individual tray and a suitable system for distributing the

Food

The invention relates to a container, a single shell and a system for distributing food according to the preamble of claim 1.

Known containers are used, for example, to contain food so that they can be removed from the place of manufacture, e.g. B. a commercial kitchen, can be transported to the destination, the food in the containers should be kept in the manufacturing state for a long time. Once at the destination, the dishes are served in the containers for the sake of simplicity. Such food containers have been described in a large number of applications by the applicant, for example in WO97 / 03891.

These containers are equipped with a connecting body, which has a cross-sectional profile in the form of an H and which, if appropriate, can also be molded onto one of the container parts. For an improved sealing possibility, the sealing leg was deflected by a bending deformation when the container parts were pressed together by the wall of the depressions in the container. For an improved sealing characteristic, the applicant has already proposed to design the sealing leg with a projection which has a snap mechanism when inserted and also a good sealing characteristic in the assembled state.

A conventional method for closing a container is known, for example, from the applicant's international application PCT / EP96 / 03228, the disclosure content of which is incorporated in full in the present patent application. In particular, the features of claims 2 and 3 and the associated description in the introduction to the description, as well as the features of claims 8 and 9 and the associated description in the introduction to the international application PCT / EP96 / 03228 are incorporated in full in the disclosure content of this application. In the known method, containers are used in which additional vessels are inserted into a base plate designed as a base plate, the upper edge of which surrounds from the plate in order to be sealed with a connecting body of the container part designed as a cover part. For this purpose, the additional vessels used are preferably fixed in the base plate or inserted with a snap lock, so that they are not lifted when the lid part is guided upwards. Due to the known sealing measure, however, it can happen that the food contained in the additional vessels can come into contact with the connecting body during transport.

Furthermore, methods for closing container parts are known, in which a base plate can also accommodate additional vessels in a corresponding contour landscape, into which the additional vessels are set in order to be covered with a lid part. The disadvantage of this is that a necessary seal can only be achieved with difficulty or even only through separate cover units which are respectively matched to the vessels, and the handling in the known method for closing a container is sometimes cumbersome and cumbersome.

A further disadvantage of the known sealing behavior is that holding the container parts together is only possible with additional locking mechanisms, and it has thus been found that the general handling of the container parts is not without problems. The object of the present invention is therefore to create a container which enables assembly in a simple manner and, if necessary, also compensates for certain nonuniformities between the container parts.

A further object of the following invention is therefore to simplify the known methods for closing a container and to improve the handling for the user.

These objects of the present invention are achieved with the features of claim 1, the features of claim 17 and the features of claim 34.

According to the application, a container is provided which contains individual shells, which in turn have a connecting body in such a way that the cover part of the container seals and / or holds together, for example, a plurality of individual shells via the connecting body rotating around the individual shells and can therefore be used for transport in a simple manner. Due to the abutment or attachment of the connecting body to the individual shells, it is achieved that, for example, the individual shells with the connecting body can be provided separately before use and are therefore particularly accessible to automation. The individual assignment of a connecting body to the individual shell ensures that the respective individual shells are taken into account independently with regard to the contour and material properties.

The container according to the application is particularly advantageous if the individual shell is made of porcelain, which naturally has larger tolerances in the dimensions due to the manufacture. According to the application, it is also ensured that, due to the predefined contact between the individual shell and the lid part of the container, a height difference compensation is possible via the connecting body, and in particular vibration compensation is provided. Likewise can heat transfer via the connecting body between the individual shell and the sealing part is prevented or heat control is established. The choice of material and the shape of the connecting body thus determine the elasticity, which supports the merging and the locking properties of the container in a wide variety of ways. If there are, in particular, tolerance-related differences between the individual shells, the shape, possibly also the thickness, of the connecting body ensures that the individual shells which are joined together via the cover part are brought together in a precisely fitting manner, ie there is a so-called self-regulation of the individual shells. A radial clamping can thus be achieved via the individual shells by means of the connecting body, the container consisting of individual shell and cover part being held together without any further locking mechanism. Special locking properties or sealing functions can also be assigned to the special shape of the connecting body. In this way, the compilation of individual different individual shells can also be made possible via a correspondingly worked lid part of the container.

With the system according to the application or the individual shell, an overall concept can thus be provided which, due to the advantageous configurations of the connecting body, the serving of the food and the return of the containers, provides a cycle which is almost completely in line with conceptual environmental-political aspects but allows distribution and storage of the goods or food to be transported with high quality. Furthermore, the advantageous design of the container enables the overall concept of the system to be able to implement a wide range of business aspects, such as customer loyalty through a special debiting procedure due to the use of the individual shells. The basis for this is that a system for distributing food is provided, which contains food delivery points that are strategically placed and also has return points for the containers. Further advantageous embodiments are the subject of the dependent claims.

It has proven to be advantageous for the handling and the merging of the container if the connecting body has a first contact area which protrudes upward beyond the rim of the shell. This ensures that the locking function can be provided via the elastic deformation of the connecting body. Furthermore, the pulling up and pulling of the connecting body over the single shell is simplified in this way.

If the connecting body has a third contact area, which bears against the shell below the border, it is ensured that the connecting body does not remain on the lid part when the lid part is removed from the individual shell.

If the connecting body has a second contact area with which the connecting body contacts the base part and thus preferably holds the base and the cover part together, then a locking mechanism and / or sealing mechanism between the individual shell, cover part and base part is provided in a simple manner. Since these mechanisms were only reduced to the area of the connecting body, individual shells with different heights can be used.

If the connecting body also has a second contact area with which the connecting body contacts the base part, a locking mechanism is thus provided via the respective contact areas, which works without further locking mechanisms and is particularly suitable for the transport of food.

Due to the fact that in particular the dish is held down by the cover part, a so-called slosh protection is achieved, as a result of which the food content that extends beyond the individual dishes is retained. The fact that the shell preferably supports a predetermined recess with a horizontal bearing surface on the base part via the connecting body, results in a simple positional fixation.

If the connecting body is designed in the form of a flexible sealing ring, in particular the fitting onto the individual shell and the deflection of the respective contact areas are guaranteed as best as possible.

It is particularly advantageous if the material thickness varies in the cross section of the connecting body, for example if the third contact area has a different material thickness than the first and / or second contact area. This means that the contact area, which interacts with the individual shell, enables increased security against loss and also provides a stabilization through the engagement of the third contact area behind the border, which is particularly beneficial in contact with the first contact area for contacting the cover part.

It is a further advantageous embodiment if the connecting body in the corner areas, preferably in the third contact area, contains form stability elements, which in particular prevent the corner area of the first contact area from being under tension, preferably tensile stress, after being placed on the individual shell. This ensures that the first contact area is provided in the corner areas in a dimensionally stable manner for contacting the cover part.

If the first contact area to the second contact area forms a recess in cross-section for receiving the edging edge, tolerance-related differences in the dimensions of the edging edge of the individual shell can be compensated or suitable external dimensions can be provided via the compensation of the connecting body, so that the individual shell can be joined together Connection body and the cover part is present even in the case of tolerances due to differences in the individual shells. The fact that the second contact area has an arcuate outer contour ensures that, on the one hand, the second contact area contacts the base part in an advantageous manner and, on the other hand, the deflections of the connecting body can be controlled more easily.

If the cross-section of the first contact area has the shape of a hammer, the contact points between the connecting body and the cover part can be made on both sides, in particular the handling when opening or removing is improved by the hammer shape.

If the first contact area has a circumferential nose, a snap-in function can be provided in particular with a suitable interaction with a groove or recess in the base part, which allows the shear forces that occur to be adjusted in an improved manner via the connecting body.

If the first contact area has the shape of a boomerang, it is ensured that the deflections, which also act counter to one another and which occur when the container part is joined together with the individual shell, are present or can be adjusted as best as possible.

If the connecting body is molded onto the shell, the advantage lies in the fact that the tolerance differences of the individual shells can be compensated for without cavities between the individual shell and the connecting body, and because of a predetermined external dimension, the molded connecting body can provide optimal conditions that provide the required functions of the connecting body Make available. Through the molding or injection molding or also gluing to the shell via a primer of the connecting body, a one-piece is thus provided, which is particularly beneficial for fully automated transport and distribution of the food. This is achieved in particular when the connecting body is preferably a silicone ring and when a porcelain or glass which has large tolerance differences due to the manufacture is preferably used. If the connecting body has a tab section that starts in particular from the third contact area, further support for fixing the individual shell via the connecting body to the bottom part is ensured, in particular to support the already existing locking force via the second contact area with the bottom part.

If the tab sections are provided with a bevelled outer contour in cross-section, which is matched to the first contact area of the connecting body in such a way that multiple individual shells can be stacked, handling is particularly beneficial in terms of full automation or the improved return of the individual shells to the filling location.

If the connecting body advantageously has a fourth contact area, which extends from the third contact area to the bottom of the individual shells, the breaking strength is increased, in particular in the case of individual porcelain shells, since the wave propagation in the porcelain that occurs when it falls down due to the impact effect on the connecting body is reduced. The same applies to individual glass shells.

If the cover part has a recess which is of the same contour as the circumferential first contact area of the connecting body, a groove structure can be integrated into this recess, the grooves of which are suitable for reducing the overpressure that occurs when the parts are joined, but ensure a corresponding moisture seal.

The system according to the application works advantageously using the individual shells according to the application or the container according to the application if several individual shells are provided which can be closed simultaneously with a cover. In this way it is possible to provide several individual shells each with the same food and to put them together to form the respective containers in a simple manner only after transportation. In this way, the circulation of the containers can advantageously be carried out fully automatically. Further advantageous embodiments are the subject of the remaining subclaims.

Preferred exemplary embodiments of the invention are explained in more detail below with reference to the drawings.

Show it:

1 shows an expansion view of the container according to the application;

2 shows a first embodiment of a cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

3 shows a second embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

4 shows a third embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

5 shows a fourth embodiment of the cross-sectional view of the contact area between the container parts, the single shell and the connecting body;

6 shows a fifth embodiment of the cross-sectional view of the contact area between the container parts, the single shell and the connecting body;

7 shows a sixth embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

8 shows a seventh embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

9 shows an eighth embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body; 10 shows a ninth embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

11 shows a tenth embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

12 shows an eleventh embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

13 shows a twelfth embodiment of the cross-sectional view of the contact area between the container parts, the individual shell and the connecting body;

14 shows a thirteenth embodiment of the cross-sectional view of the contact area between the container parts, the single shell and the connecting body;

15 is a top view of the bottom part of the container according to the application;

16 is a sectional drawing of the container according to the application in the assembled state.

1 shows an expansion view of an embodiment of the container according to the application, the container having a cover part 3 in addition to the individual shells 1 and the individual shells being held together and sealed by the cover part 3 via the connecting bodies 5. A base part 7 is optionally shown, which has depressions in which the individual shells 1 can be adjusted. With this container it is thus possible to seal individual shells 1, which each have separate connecting bodies 5, with a cover part 3.

In Fig. 2, the contact between the individual shell 1, the cover part 3 and the connecting body 5 is shown in cross section, wherein a bottom part 7 is also shown. As can be clearly seen in FIG. 2, the connecting body has a first contact area 10, a second contact area 12 and a third contact area 14 in cross section. The first contact area 10 serves to contact the cover part 3, the overlap between the geometric configurations between the connecting body 5 and the cover part 3 being shown in FIG. represents is. When the cover part 3 is brought together with the individual shell 1 together with the connecting body 5, the connecting body is thus deflected, a tension or return voltage being generated due to the elasticity of the connecting body, which holds the cover part 3 on the connecting body 5. It is also shown in FIG. 2 that the third contact area engages with the contour of the individual shell 1 in the grip behind the border edge 9 and thus prevents the connecting body 5 from detaching from the single shell 1. It can also be seen that due to the deflection of the first contact area 10 of the connecting body 5, the second contact area 12 is pressed against the bottom part 7 and thus a tensioning of the connecting body 5 occurs, which holds both the cover part 3, the bottom part 7 and the individual shell 1 together and also seals at the same time. Furthermore, it can be clearly seen that the cover part 3 holds down the border edge 9 of the individual shell 1 in such a way that a slosh protection is present which prevents, for example, food from contacting the connecting body 5 during transport or the cover contacting the cover part 3 occurs. This ensures that the sealing function of the container is maintained. It can also be seen that the cover part 3 contains a recess 21 into which the first contact area 10 can engage. The groove structure for venting or relieving the excess pressure can be present in this recess, wherein the groove structure according to this embodiment can also be provided in the vertically aligned edge surface 23 of the recess.

Basically, it should be mentioned at this point that the respective geometric configurations of the base and cover part can be coordinated with one another in such a way that, for example, the insertion surface of the cover part 3, which deflects the first contact area 10 of the connecting body 5, is flattened differently, so that it is ensured, in particular, when joining is that the compression effect of the first contact area is avoided. It can also be clearly seen that the first contact area 10 with the second contact area 12 has a recess 25 in cross-section, into which the bordering edge 9 of the individual shell 1 can be received. In this illustration it can be clearly seen that between the outer dimensions of the border and the recess there is a gap or Distance A is provided, which is provided in particular for the fact that tolerance-related differences in the outer dimensions of individual shells, which can be present in particular in the case of porcelain shells, can be compensated or compensated for. In this way, it is also ensured that, in particular, the first contact region 10 projecting vertically upward above the border 9 is available for merging with the cover part 3, almost independently of the dimensions of the individual shell. Likewise, in the third contact area 14, dimensional stability elements 30 are provided in FIG. 2, which in particular in the corner areas result in the first contact area 10 possibly remaining unchanged due to an existing tensile stress.

FIG. 3 shows a second embodiment of the object according to the application, in particular the design of the connecting body 105, in this embodiment the design of the first contact area 110 and of the second contact area 112 has changed compared to the embodiment in FIG. 2. As can be clearly seen, the first contact area 110 and / or the second contact area 112 has the shape of a boomerang, so that the flex area is supported against the base part and the end area against the cover part. With this embodiment, the advantages according to the patent application PCT / EP02 / 04614 of the applicant come into play, which is used in full.

FIG. 4 shows a third embodiment of the object according to the application, the first contact area 210 of the connecting body 205 having been changed compared to the first embodiment according to FIG. 2. It can clearly be seen that the end region of the first contact region 210 has the shape of a hammer in cross section, so that, for example, a sufficiently good hold for the user can be found when the connecting body is pulled on or off. This embodiment also shows the same advantageous sealing and locking properties as the previous embodiments. FIG. 5 shows a further embodiment, which, in particular in comparison to the embodiment shown in FIG. 4, has a circumferential nose in the first contact area 310 of the connecting body 305, with which in particular a snap-in function with the connecting body 305 is made possible.

A further embodiment is shown in FIG. 6, with a tab section 440 being provided compared to the embodiment according to FIG. 2 and projecting downward in particular from the third contact region 414 of the connecting body 405. This tab section 440, which is preferably only provided in certain areas, serves in particular to provide an additional centering function or locking force for the base part 407, in order in particular to enable further tensioning of the connecting body, which supports the locking function.

In addition to the embodiment in FIG. 6, the tab section 540 is also shown in FIG. 7.

8 essentially shows the connecting body according to the first embodiment, a fit between the cover part over the edge 613 being possible, but the locking and sealing function still through the connecting body 605, in particular over the first area 610 and the tab portion 640 , provided.

In addition to the first embodiment, the tab section 740 in FIG. 9 protrudes from the third contact area in such a way that only one contact surface is provided in the bottom part, against which the second contact area and the tab section 740 bears. A further recess in the bottom part 707 is therefore not necessary.

FIG. 10 shows a further embodiment of the first contact section 810 of the connecting body 805, specifically in such a way that the first contact section only protrudes slightly above the bordering edge 809 of the individual shell 801 and the second contact area 812 contacts the cover part 803, so that the bracing over the second contact area 812 the tabs Section 840 of the connecting body 805 with the bottom part 807 and the shell 801.

FIGS. 11, 12 and 13 show further embodiments which, although they represent possible configurations, also represent the required functionality in a simpler manner.

A further embodiment is shown in FIG. 14, with a tab section 1440 being shown in comparison with the embodiment according to FIG. 2, which tab projects in particular downward from the third contact region 1414 of the connecting body 1405. This tab section 1440, which is preferably only provided in some areas, serves to interact with the first contact area, in particular due to the bevelled outer contour, in such a way that it can be stacked.

15 shows a top view of the bottom part 7, which has depressions 71 into which the individual shells can be adjusted. From this top view it can be seen that there are recesses 73 adjacent to the depressions, which in particular simplify the removal of the individual shells.

16 shows a sectional drawing of the container according to the application in the assembled state, in particular with a connecting body 840 according to FIG. 10. It can be seen here that the cover part 3 holds the individual shell 801 together via the connecting body 805 and can thus be adjusted into a base part, whereby the bottom part is held together again via the connecting body. Furthermore, it can be seen from this sectional drawing that protrusions are provided in some areas which facilitate the removal of the components shown from the base part.

At this point it should be emphasized that each of the embodiments, in particular the one shown in FIGS. 1 to 10, in each case makes the required sealing properties and locking properties of the container as well as the centering property and the tolerance compensation possible. Furthermore, it is possible to design both the base and the cover part as an insulating body, the shape Shell of the base or lid part separately from the insulating compound and can be put together as required.

Claims

1. Container, in particular for dishes for serving, storing and transporting, with at least one base and cover part, the base part having at least one dish-shaped recess into which a separate dish can be adjusted, characterized in that a connecting body which can be attached to the dish is provided , so that the shell is sealed off from the cover part.

2. Container according to claim 1, wherein the connecting body has a first contact area which protrudes upward beyond the border of the shell.

3. Container according to one of claims 1 or 2, wherein the connecting body has a third contact area, which bears against the shell below the border.

4. Container according to one of claims 1 to 3, wherein the connecting body has a second contact area with which the connecting body contacts the bottom part and thus preferably holds the bottom part and the lid part together.

5. Container according to one of claims 1 to 4, wherein the shell, in particular the border, is held down by the cover part.

6. Container according to one of claims 1 to 5, wherein the shell is supported by the connecting body on the bottom part, in particular a predetermined recess with a horizontal contact surface.

7. Container according to one of claims 1 to 6, wherein the connecting body is designed in the form of a flexible sealing ring.

8. Container according to one of claims 1 to 7, wherein the third contact area has a different material thickness than the first and / or second contact area.

9. Container according to one of claims 1 to 8, wherein the connecting body contains dimensional stability elements in the corner regions.

10. Container according to one of claims 1 to 9, wherein the first contact area to the second contact area in cross section forms a recess for receiving the border edge.

11. Container according to one of claims 1 to 10, wherein the second contact area has an arcuate outer contour.

12. Container according to one of claims 1 to 10, wherein the first contact region has the shape of a hammer in cross section.

13. Container according to one of claims 1 to 12, wherein the first contact area has a peripheral nose, preferably tapered peripheral nose.

14. Container according to one of claims 1 to 13, wherein the part of the third contact region facing the shell has the same contour as the outer shape of the shell, and is preferably seen in cross section.

15. Container according to one of claims 1 to 10, wherein the first contact area has the shape of a boomerang.

16. Container according to one of claims 1 to 15, wherein the connecting body, preferably silicone ring, is integrally formed on the shell, preferably made of porcelain or glass.

17. Container according to one of claims 1 to 16, wherein the connecting body, preferably starting from the third contact area, has a tab section, in particular in some areas.

18. Container according to claim 17, wherein the tab portion has a bevelled outer contour in cross section, so that a stackability of several trays is possible.

19. Container according to one of claims 1 to 18, wherein the connecting body has a fourth contact area which extends from the third contact area to the bottom of the individual shell on the outside.

20. Container according to one of claims 1 to 19, wherein the cover part has a contour of the circumferential first contact area of the connecting body, in which a groove structure is integrated.

21. Single shell, preferably for setting in at least one recess in a base part of a container, with a border which has a, preferably circumferential, connecting body for sealing a corresponding cover part.

22. Single shell according to claim 21, wherein the connecting body has a first contact area which protrudes upward beyond the border of the shell.

23. Single shell according to one of claims 21 or 22, wherein the connecting body has a second contact area, which bears against the shell below the rim.

24. Single shell according to one of claims 21 to 23, wherein the connecting body has a third contact area with which the connecting body contacts the bottom part and thus preferably holds the bottom part and the lid part together.

25. Single shell according to one of claims 21 to 24, wherein the shell, in particular the border, is held down by the cover part.

26. Single shell according to one of claims 21 to 25, wherein the shell is supported by the connecting body on the bottom part, in particular a predetermined recess with a horizontal bearing surface.

27. Single shell according to one of claims 21 to 26, wherein the connecting body is designed in the form of a flexible sealing ring.

28. Single shell according to one of claims 21 to 27, wherein the third contact area has a different material thickness than the first and / or second contact area.

29. Single shell according to one of claims 21 to 28, wherein the connecting body contains dimensional stability elements in the corner regions.

30. Single shell according to one of claims 21 to 29, wherein the first contact area to the second contact area in cross section forms a recess for receiving the border edge.

31. Single shell according to one of claims 21 to 30, wherein the second contact area has an arcuate outer contour.

32. Single shell according to one of claims 21 to 30, wherein the first contact region has the shape of a hammer in cross section.

33. Single shell according to one of claims 21 to 30, wherein the first contact area has a circumferential nose, preferably tapering circumferential nose.

34. Single shell according to one of claims 21 to 33, wherein the part of the third contact region facing the shell has the same contour as the outer shape of the shell, and is preferably seen in cross section.

35. Single shell according to one of claims 21 to 30, wherein the first contact area has the shape of a boomerang.

36. Single shell according to one of claims 21 to 35, wherein the connecting body, preferably silicone ring, is molded onto the shell, preferably made of porcelain or glass.

37. Single shell according to one of claims 21 to 36, wherein the connecting body, preferably starting from the third contact area, has a tab section, in particular in some areas.

38. single shell according to claim 37, wherein the tab portion has a chamfered outer contour in cross section, so that a stackability of several shells is possible.

39. Single shell according to one of claims 21 to 38, wherein the connecting body has a fourth contact area which extends from the third contact area to the bottom of the single shell on the outside.

40. System for distributing food, in particular using a container according to one of claims 1 to 20.

41. The system of claim 40, wherein

a) there are provided delivery points for dishes which are preferably strategically placed in metropolitan areas and from which the containers filled with the dishes are dispensed, and

b) return points for the containers

are provided.

42. System according to one of claims 40 and 41, wherein the dishes are prepared in the additional trays and are fed to the delivery points via refrigerated vehicles.

43. System according to any one of claims 40 to 42, wherein the food products cooked and chilled, as pre-portioned semi-finished products or only prepared and portioned products are fed to the dispensing offices.

44. System according to one of claims 40 to 43, wherein the charge is made via a debiting system, preferably in the form of a card system, with regard to the requested meals and the returned containers are registered as a credit.

45. System according to one of claims 40 to 44, wherein the transfer of the container from the holder to the user takes place with a base payment and a time-dependent usage fee.

46. System according to one of claims 40 to 45, wherein the return of the container is accepted without withholding a consumption fee.

47. System according to one of claims 40 to 46, wherein the acceptance of the container can be prevented by a public declaration on the part of the holder of the container.

48. System according to one of claims 40 to 47, wherein the delivery point and the return point are integrated in a cooking house.

49. System according to one of claims 40 to 48, wherein the return circuit of the containers takes place fully automatically, preferably in the cooking house.

50. System according to one of claims 40 to 49, wherein a plurality of individual shells are provided which are closed simultaneously with a cover.