Abstract:
Tray is engineered for receiving food, in particular on board aeroplanes, vehicles or other transport means, wherein the tray comprises a tray body, on which a first receiving surface for receiving food is formed, and a receiving part extending above the first receiving surface and spaced therefrom, on which upper side of which a second receiving surface for receiving food extending above the first receiving surface and spaced therefrom. Since the receiving surfaces are disposed on different planes, the actual area of the tray may be slight, in which case the receiving surfaces disposed lying above one another together form a receiving surface which may be substantially larger than the area of the tray. The tray is therefore particularly suitable for use in restricted spatial conditions, for example on board aeroplanes. The vertical dimensions of the tray may be such that the tray body with the receiving part placed thereon fits into a slide-in unit of an existing trolley. This saves space, for example on board aeroplanes.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a continuation of application no. PCT/EP98/03323, filed Jun. 4, 1998, which claims the priority of German application no. 197 24 302.9, filed Jun. 9, 1997, and each of which is incorporated herein by reference. 
    
    
     FIELD OF THE INVENTION 
     The invention relates to a tray of the type having a tray body including a first food receiving surface, a receiving part spaced above the first receiving surface, and a second food receiving surface on the top side of the receiving part, the tray being particularly suited for use on board aeroplanes, vehicles or other transport means. 
     BACKGROUND OF THE INVENTION 
     Such trays are generally known. They comprise a receiving surface for receiving food, wherein the food, for example on board aeroplanes, may be contained in meal containers, bowls, beakers, cups or the like, which when the tray is used, for example when serving meals with the tray, stand on the receiving surface. 
     When catering for travellers, in particular on board aeroplanes, it is frequently necessary to serve with the tray a complete meal, the constituents of which (starter, main course, dessert) are contained in several meal containers, so that the receiving surface of the tray has to have a correspondingly large design. This particularly applies when drinks are also to be served at the same time as the meal with the tray. In the case of trays having large receiving surfaces, problems frequently occur on account of the restricted spatial conditions especially on board aeroplanes, for example, if passengers sitting next to one another bump against one another with their trays. There is then the danger that beakers or cups standing on the tray are knocked over and their contents spilt. 
     In the case of smaller trays having correspondingly smaller receiving surfaces, problems are caused by the fact that the meal containers and the like stand tightly packed on the tray, which makes their handling difficult, for example when opening. Moreover no storage surface, for example for lids removed from meal containers, is available on such trays. 
     A tray of the pertinent kind is known from the U.S. Pat. No. 1,669,065 and consists of a tray body subtending a first food receiving surface and of a receiving section above and spaced from said first receiving surface, a second food receiving surface being present in the top side of said receiving section. 
     The receiving section of this known tray is connected in collapsible manner by a folding mechanism to the tray body. 
     This known tray incurs the drawback that the collapsible linkage of receiving section and tray body renders manufacture complex and hence costly. The known tray incurs a further drawback of limited versatility in use because the receiving section in its operative position always assumes the position relative to the tray body on account of the folding linkage between receiving section and tablet body. 
     The German patent document A 25 01 427 describes a stackable container and serving tray wherein each serving board offers only one receiving surface. This known tray therefore is poorly applicable to constricted spaces. 
     A serving tray is known from the German patent document A 21 20 473 which also comprises only one receiving surface and hence is poorly suited for constricted spaces. 
     The German patent document U 90 02 925.9 describes a plastic multi-way packaging means consisting of a rectangular menu dish with removable cover. 
     The objective of the invention is to create a tray of the pertinent kind that shall be free of the above cited drawbacks, which therefore shall also be appropriate in constricted spaces, which shall be simple and hence economical to manufacture and which shall be versatile. 
     This object is achieved by the teaching set forth herein. For example, this object is achieved by the tray according to the invention that includes a tray body having a first food receiving surface, a receiving part spaced above the first food receiving surface, and a second food receiving surface on the top side of the receiving part; that receiving part being configured for being placed on the tray body and being detachably or displaceably connected to the tray body 
     The basic idea of the teaching specified by the invention lies in arranging receiving surfaces above one another on different planes one above the other so that the actual area of the tray may be small, but the receiving surfaces arranged on planes lying one above the other together form a receiving surface which may be substantially larger than the area. 
     In this manner spatial problems are avoided, and the handling of the tray is improved. 
     The tray may have such dimensions with respect to its height that it fits into slide-in compartments of existing trolleys. Consequently special trolleys are not required for the tray specified by the invention. 
     On account of the receiving surfaces disposed above one another, the area of the tray specified by the invention may be reduced in comparison with conventional trays, without the receiving surface which overall is available being reduced. However with a reduced area a larger number of trays specified by the invention fits into a slide-in compartment of a trolley when compared with conventional trays. Consequently considerable space is saved by saving trolleys when compared with conventional trays, for example on board aeroplanes. By the reduced spatial requirement for the food, it is possible to install additional rows of seats in aeroplanes, or with the same number of rows of seats to increase the spacing between the rows of seats, which saves costs or respectively ensures greater comfort for the passengers. 
     The receiving part may be securely connected to the tray body, for example moulded in one piece with the tray body. However an advantageous further development of the teaching according to the invention specifies that the receiving part is detachably or movably connected to the tray body. In this embodiment the receiving part may for example be removable, so that after the removal of the receiving part access to meal containers or the like disposed on the first receiving surface is facilitated. 
     In the above-mentioned embodiment the receiving part is expediently constructed as an attachment placed on the tray body. 
     In the embodiments with the detachable receiving part, the receiving part expediently comprises an edge from which at opposite sides of the receiving part edge parts extend, which protrude over the underside of the receiving part and with which the receiving part is supported on the tray body. Since the edge parts may be moulded in one piece with the edge of the receiving part, this embodiment is simple and inexpensive to produce. It also has a robust construction. 
     A particularly advantageous further development of the embodiment with the detachable receiving part specifies that the receiving part is disposed displaceable on the tray body in such a manner that, with the displacement of the receiving part, the second receiving surface moves substantially parallel to the first receiving surface. In this embodiment the user may displace the receiving part to one or the other side into different positions, so that access to meal containers or the like standing on the first receiving surface of the tray body is facilitated. 
     An expedient further development of the embodiment with the displaceable receiving part specifies that on opposite sides the tray body is provided with grooves extending in the direction of displacement of the receiving part and that the edge parts engage in the grooves by ends shaped substantially to complement the grooves. This embodiment is simple and inexpensive to produce and guarantees a secure retention of the receiving part on the tray body transversely to the direction of displacement. However the receiving part may engage in the grooves by projections extending towards the tray body instead of by the edge parts. 
     The edge parts expediently extend in the direction of displacement substantially over the entire extent of the receiving part. In this manner the stability of the receiving part and its retention on the tray body transversally to the displacement direction is further improved. 
     A further development of the embodiment with the grooves specifies that on at least two opposite sides the tray is provided with handles, on the upper side of which the grooves are formed. With this embodiment production is facilitated, because the grooves do not have to be constructed on the tray body, but may be formed in the handles, which during the production of the tray are added to the tray body or are pushed onto a tray edge. However the handles may also be moulded in one piece with the tray body, especially by injection moulding. Moreover the grooves may also be formed between the handle and a part of the tray body. 
     Another further development of the teaching according to the invention specifies that the second receiving surface formed on the receiving part is smaller than the first receiving surface. In this embodiment the receiving part covers only a part of the first receiving surface in the plan view so that the uncovered part of the first receiving surface is accessible from above. In this manner the handling of meal containers or the like standing on the first receiving surface is facilitated. 
     In the above-mentioned embodiment the second receiving surface may be roughly half the size of the first receiving surface. 
     In accordance with another further development of the teaching specified by the invention, the tray and/or the receiving part comprises an edge extending upwardly from the respective receiving surface. In this embodiment objects disposed on the receiving surface are prevented from slipping off the side. 
     The first receiving surface and/or the second receiving surface may be provided with shaped portions, especially depressions, which limit standing surfaces, which correspond at least partially to the outer contour of the bottom of meal containers, bowls , beakers, cups or the like to be placed on the tray. The retention of these objects on the receiving surface is improved thereby. 
     The shape and size of the tray may be chosen within wide limits, and the tray may be made from various materials. However the tray body and/or the receiving part is expediently made from plastics, so that the tray specified by the invention can be produced simply and inexpensively. The tray body and/or the receiving part are preferably made from transparent plastics, so that objects disposed on the first receiving surface can be seen through the receiving part beneath the receiving part. 
     According to a further development of the teaching specified by the invention, the tray comprises connecting means for the detachable connection of the tray to at least one adjacent tray. In this embodiment a detachable series connection of adjacent trays is formed, which is advantageous, for example, when the trays are disposed one behind the other in a trolley and are to be removed one after the other from the trolley. The front tray in the removal direction then entrains the next following tray in the removal direction so that the trays may be comfortably removed one after the other. 
     A further development of the embodiment with the connecting means specifies that the connecting means are formed by a first connecting element which is disposed laterally on the tray and comprises a groove extending substantially parallel to the side of the tray, and by a second connecting element which is disposed at the side of the tray opposite the first connecting element and comprises a protuberance for form-fit engagement in a groove of a first connecting element of an adjacent tray. This embodiment is simple, inexpensive to produce and operationally safe. 
     In this case the connecting elements may be disposed on the tray body and/or on the receiving part. 
     A further development of the embodiment with the connecting elements specifies that the free ends of the connecting elements are constructed as hooks, with the hook of the first connecting element pointing downwards and the hook of the second connecting element pointing upwards in such a manner that the first connecting element of a tray can be hooked on the second connecting element of an adjacent tray. In this embodiment a secure connection of adjacent trays is formed, which can be released by lifting one of the trays and unhooking the first connecting element from the second connecting element of the adjacent tray. 
     The shape, size and cross-section of the connecting elements can be selected within wide limits. However a particularly advantageous further development of the embodiment with the connecting elements specifies that the first and/or the second connecting element has or have a substantially arrow-shaped cross section, the arrow point of which points away from the tray. One advantage of this embodiment in comparison with the above-mentioned embodiment lies in that the first and second connecting elements of a tray can be connected both to the first connecting elements and also to the second connecting elements of an adjacent tray, whereas with the above-mentioned embodiment it is only possible to connect adjacent trays if a first connecting element of a tray with its downwardly pointing hook lies opposite a second connecting element of an adjacent tray with its upwardly pointing hook. 
     According to an expedient further development of the embodiment with the connecting elements with the connecting elements having the substantially arrow-shaped cross section, the cross section of the connecting elements increases outwardly along the side of the tray. The connecting elements may, for example, be constructed in such a manner that their cross section increases to the side both upwardly and downwardly along the side of the tray on which the respective connecting element is disposed. If, for example, the connecting element is disposed on a narrow side, then its cross section can increase along the narrow side to the adjacent longitudinal side, for example in such a manner that the area of the arrow point of the arrow-shaped cross section increases. In this manner the hooking of the trays onto one another is facilitated. 
     The connecting elements may be placed on the tray body and/or the receiving part. In accordance with an expedient further development, the connecting elements are however moulded on the tray body and/or the receiving part. This embodiment can be produced simply and inexpensively. 
     An advantageous further development of the embodiment with the grooves specifies that in the region of their ends the grooves comprise a stop to limit the displacement of the receiving part in relation to the tray body. In this embodiment the edge parts of the receiving part are prevented from moving out of the grooves in the displacement direction, so that an unwanted detachment of the receiving part from the tray body is avoided. 
     In this case the stop is expediently formed by the connecting element, so that a separate component is not necessary. 
     In the embodiment with the edge parts, they may expediently comprise an outwardly pointing edge region in the region of their free ends. If the receiving part is used separately, i.e. without the tray body, the receiving part may be supported by these edge part for example on an edge bead of a table top of a passenger table in an aeroplane. 
     In the embodiments with the detachable receiving part clamping means may be provided for the connection of the receiving part to the tray body by clamping. An undesired detachment of the receiving part from the tray body is prevented by these clamping means. 
     The clamping means are in this case expediently formed by at least one clamp, which in the clamping position engages to clamp over the edge of the tray body and the edge region of the edge parts of the receiving part. In this embodiment, when the clamp is clamped on, the receiving part is securely connected to the tray body and after the removal of the clamp can be detached from the tray body. 
     The clamp may be constructed as a separate part. An advantageous further development however specifies that the clamp is moulded on the edge of the tray body or the edge region of the edge parts of the receiving part. In this embodiment production is simplified, since a separate part is no longer necessary for the clamp. 
     Another further development of the teaching according to the invention specifies that in the region of its edge the tray body is preferably provided with support parts which protrude over the underside of the tray body. In this embodiment the tray may be housed suspended in a trolley or be supported by the support parts in a compartment of the trolley. 
     The tray specified by the invention may also comprise more than two planes disposed one over the other, on which receiving surfaces are situated. 
     The invention is described in further detail below by means of the attached drawings in which exemplified embodiments are represented. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows in a diagrammatical side view a first exemplified embodiment of the tray specified by the invention without the receiving part, 
     FIG. 2 shows a top plan view in FIG. 1 of the tray shown in FIG. 1, 
     FIG. 3 shows in a diagrammatical side view a receiving part of the tray shown in FIG. 1, 
     FIG. 4 shows a top plan view in FIG. 3 of the receiving part shown in FIG. 3, 
     FIG. 5 shows in a partially sectional side view the tray shown in FIG. 1 with the addition of the receiving part shown in FIG.  3  and meal containers placed on the tray, 
     FIG. 6 shows a top plan view in FIG. 5 of the arrangement as shown in FIG. 5, 
     FIG. 7 shows the tray shown in FIG. 1 with meal containers placed thereon, but without the receiving part, 
     FIG. 8 shows in an identical representation to FIG. 5 a second exemplified embodiment of the tray specified by the invention, 
     FIG. 9 shows in an identical representation to FIG. 1 the tray shown in FIG. 8 without the receiving part, 
     FIG. 10 shows a plan view of a second exemplified embodiment of the receiving part, 
     FIG. 11 shows a plan view of a third exemplified embodiment of the tray specified by the invention without the receiving part, 
     FIG. 12 shows the tray shown in FIG. 11 in a partially sectional side view with meal containers placed thereon, 
     FIG. 13 shows the lower half of the tray as shown in FIG. 11 with meal containers seated thereon, 
     FIG. 14 shows a diagrammatical sectional view of the interconnected connecting elements of adjacent trays disposed next to one another, 
     FIG. 15 shows a diagrammatical sectional view of a further embodiment of connecting elements, 
     FIG. 16 shows in an identical representation to FIG. 15 a further embodiment of connecting elements, 
     FIG. 17 shows in an identical representation to FIG. 6 a fourth exemplified embodiment of the tray specified by the invention with connecting elements shown in FIG. 16, 
     FIG. 18 shows a view in the direction of an arrow A in FIG. 17 of the tray shown in FIG. 17 without the receiving part, 
     FIG. 19 shows a view in the direction of an arrow B in FIG. 17 of the tray shown in FIG. 17 with the receiving part placed thereon, 
     FIG. 20 shows in an enlarged representation a detail in FIG. 19 in the region of the connecting element, 
     FIG. 21 shows the receiving part shown in FIGS. 19 and 20 without the tray body, 
     FIG. 22 shows a first exemplified embodiment of clamping means for connecting the tray body to the receiving part by clamping, 
     FIG. 23 shows a second exemplified embodiment of clamping means for connecting the tray body to the receiving part by clamping, 
     FIG. 24 shows a detail of a further exemplified embodiment of the tray specified by the invention contained in a trolley in the region of the edge of the tray body and 
     FIG. 25 shows a plan view of a part of the first receiving surface of a further exemplified embodiment of the tray specified by the invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Identical or corresponding components are provided with the same reference numbers in the figures of the drawings. 
     Represented in FIG. 1 is a tray  2 , which comprises a flat tray body  4  made of plastics, on the upper side of which a first receiving surface  6  is formed. The tray  2  comprises an edge  8  extending upwardly and outwardly from the tray body  4 . The edge  8  may extend over the entire periphery of the tray; however it may also be formed on just two opposite sides of the tray  2 . Attached to the edge  8  at two opposite sides of the tray  2  are flat handles  10 ,  12 , which at their upper sides are provided in each case with a groove  14  or  16  respectively open at the top. 
     From FIG. 2 it can be seen that the tray body  4  has a substantially rectangular construction. Furthermore it can be seen that the edge  8  extends substantially over the entire length of the sides at which the handles  10 ,  12  are provided, with the grooves  14 ,  16  extending over the entire length of the handles  10 ,  12 . Moreover it can be seen from FIG. 2 that on the first receiving surface  6  the tray  2  comprises shaped portions  18 ,  20  , which in this exemplified embodiment are formed by depressions in the first receiving surface  6  of the tray body  4  and limit standing surfaces  22 ,  24 , which is adapted to the outer contour of the bottom of meal containers, bowls, beakers, cups or the like in which the food is contained. 
     Represented in FIG. 3 is a receiving part  26 , which comprises a flat body  28  made from plastics. Formed on the upper side of the body  28  is a second receiving surface  30 , and from the body  28  an edge  32  extends upwardly and outwardly, whereby the edge may extend over the entire periphery of the body  28  of the receiving part  26  in its edge region or may be formed just on two opposite sides of the body  28 . Moreover at opposite sides the receiving part  26  comprises edge parts  34 ,  36  extending downwardly from the edge  32 , the ends  38 ,  40  of which are shaped to be substantially complementary to the grooves  14 ,  16  of the tray body  4 . 
     From FIG. 4 it can be seen that the edge  32  extends substantially over the entire extent of the longitudinal sides of the receiving part  26  and that the edge parts  34 ,  36  also extend substantially over the entire extent of the sides of the receiving part  26 . Moreover it can be seen from FIG. 4 that the receiving part  26  comprises a shaped portion  42 , which limits a standing surface  44  which is adapted to the outer contour of the base of meal containers or the like. 
     From a comparison of FIGS. 2 and 4 it can be seen that the second receiving surface  30  is only roughly half the size of the first receiving surface  6  of the tray  2 . 
     The receiving part  26  is constructed as an attachment to the top of the tray body  4 . 
     In FIG. 5 the tray  2  is represented with the receiving part  26  placed on top of it. In this position the receiving part  26  engages by the ends  38 ,  40  of its edge parts  34 ,  36  into the grooves  14 ,  16  of the tray and can be displaced in relation thereto in the groove direction, i.e. in the longitudinal direction of the tray  2 . In the arrangement shown in FIG. 5, meal containers  46 ,  48  are placed on the first receiving surface  6  of the tray  2  and a meal container  50  is placed on the second receiving surface  30 . The clear width between the underside of the receiving part  26  and the first receiving surface  6  has such dimensions that the meal containers  46 ,  48 , where appropriate with lids, are situated in the space formed between the receiving part  26  and the first receiving surface  6 , without bumping from below against the receiving part  26 . In this manner the meal containers  46 ,  48  remain in their position, even with a displacement of the receiving part  26  relative to the tray body  4 . 
     By virtue of the fact that the receiving surfaces  6 ,  30  are disposed above one another in different planes, even if the area of the tray  2  is small there is sufficient space available for meal containers or the like on the other receiving surfaces  6 ,  30 . 
     The tray  2  has such height dimensions that the tray body  4  with the receiving part  26  placed thereon fits into a slide-in unit of a trolley. For this purpose it may only be necessary to store the meal container  50  separately and only after removing the tray  2  from the trolley to place it on the second receiving surface. 
     The receiving part  26  may for example be placed onto the tray body  4  in such a manner that it is located over the one half of the tray body  4 , so that objects having a height which is greater than the clear width between the underside of the receiving part  26  and the first receiving surface  6  may be placed on the other half of the tray body  4 . This is indicated for a cup  52  in FIG. 5 by broken lines. 
     From FIG. 6 it can be seen that the receiving part  26  is disposed over one half of the tray body  4 . In this position the meal container  50  disposed on the second receiving surface  30  and a meal container  54  disposed on the first receiving surface  6  are accessible from above. To open the remaining meal containers  46  and  48  the user displaces the receiving part  26  in the direction of an arrow  56 , so that it is disposed over the upper half of the tray body  4  in FIG. 6, so that the meal containers  46 ,  48  are then accessible from above. When the receiving part  26  is displaced the cup  52  may be placed on the second receiving surface  30  of the receiving part  26 . 
     From FIG. 6 it can also be seen that the shaped portions  18 ,  20 ,  42  are constructed in such a manner that the standing surfaces limited by them are in each case adapted to the outer contour of parts of the base of the meal containers  46 ,  48 ,  50 ,  54  and also of the cup  52 . In this manner the meal containers  46 ,  48 ,  50 ,  54  and the cup  52  are securely retained on the receiving surfaces  6 ,  30 . 
     The tray  2  may also be used without the receiving part  26 , as is represented in FIG.  7 . Moreover the receiving part  26  may also be used without the tray body  4 , as is explained in further detail below in the case of FIG.  21 . 
     FIG. 8 shows a second exemplified embodiment of the tray  2  specified by the invention with the receiving part  26  placed thereon and meal containers  46 ,  48 ,  50  situated on said part. This exemplified embodiment differs from that shown in FIGS. 1 to  5  in that the edge  8  comprises an extension  58  extending outwardly from the tray body  4 , on which the handles  10 ,  12  are disposed. By virtue of the extension  58 , in this exemplified embodiment the handles  10 ,  12  are constructed larger than in the exemplified embodiment shown in FIGS. 1 to  7 , so that the handling of the tray  2  is further improved. 
     FIG. 9 shows the tray shown in FIG. 8 without the receiving part  26  and without the meal containers. 
     FIG. 10 shows a second exemplified embodiment of the receiving part  26 , which differs from the first exemplified embodiment shown in FIG. 4 in that the receiving part  26  is provided on one transverse side with first connecting elements  60 ,  62 , which in this exemplified embodiment are disposed in pairs, and on the opposite transverse side with second connecting elements  64 ,  66 , which in this exemplified embodiment are also provided in pairs. The first connecting elements  60 ,  62  and the second connecting elements  64 ,  66  form connection means for the detachable connection of the tray  2  with adjacent tray not represented in FIG. 10, for example if the trays are placed next to one another on a trolley. The connecting means are explained in further detail below. 
     FIG. 11 shows a plan view of a tray body  4  of a third exemplified embodiment of the tray  2  specified by the invention. This exemplified embodiment differs from the exemplified embodiment shown in FIG. 2 by the fact that in this exemplified embodiment on one transverse side of the tray first connecting elements  60 ,  62  arranged in pairs are provided and on the opposite side second connecting elements  64 ,  66  also arranged in pairs are provided. 
     FIG. 12 represents the tray shown in FIG. 11 in a partially sectional side view. It can be seen that the shaped portions  18 ,  20  of the first receiving surface  6  which limit the standing surfaces  22 ,  24  are formed by raised portions  68 ,  70 . However the shaped portions  18 ,  20  may be formed by recesses, as is described in more detail above. 
     FIG. 13 shows a view top plan view of the lower half of the tray  2  in FIG. 11 as shown in FIG. 11, in which case a container  54 , a cup  52  and a further meal container  72  are situated on the tray. 
     FIG. 14 shows in a diagrammatical sectional view a first connecting element  60  of the tray body  4 , which is connected to a second connecting element  64  of a tray which is not represented in the drawings and is adjacent to the tray  2 . 
     The first connecting element  60  comprises a groove  74  extending substantially parallel to the side of the tray and open at the top, while the second connecting element  64  comprises a projection  76 , with which the second connecting element  64  engages with form fit in the groove  74  of the first connecting element  60  of the adjacent tray. When the tray  2  is pulled in the direction of an arrow  79 , for example when withdrawing the tray  2  from a trolley, the tray  2  entrains the adjacent tray in the direction of the arrow  79  by the form-fit connection of the connecting elements  60 ,  64 . When the tray  2  is removed from the trolley, the second connecting element  64  of the tray  2  can be unhooked from the first connecting element  60  of the adjacent tray. 
     In this manner the handling of the tray  2  specified by the invention is improved, especially if several trays  2  specified by the invention are contained in a trolley. 
     The connecting elements  60 ,  62 ,  64 ,  66  may be provided on the tray body  4  and/or on the receiving part  26 . 
     FIG. 15 shows a further exemplified embodiment of connecting elements  60 ,  64 , which are disposed at opposite sides of the tray body  4 . In this exemplified embodiment the free end of the first connecting element  60  is constructed as a downwardly pointing hook  76  and the free end of the second connecting element  64  as an upwardly pointing hook  78 . At their ends faced away from the tray body  4  the hooks  76 ,  78  in each case comprise a bevelled edge  80 ,  82 , which in each case slopes towards the tray body  4 . To connect the first connecting element  60  of the tray  2  to a second connecting element  64  of an adjacent tray, the tray  2  is displaced towards the adjacent tray, as illustrated by an arrow  79  in FIG.  15 . In this case the hook  76  of the first connecting element  60  slides by its bevelled edge  80  up to the bevelled edge  82  of the second connecting element  64  of the adjacent tray and finally hooks onto the hook  76 , so that the trays are connected to one another and when one of the trays is moved in the direction of the arrow  78  or in the opposite direction to the arrow  79  the respectively adjacent tray is entrained and in this manner a series connection is formed between the trays. The connecting elements  60 ,  64  can be added to the tray  2  or formed in one piece therewith. 
     Represented in FIG. 16 is a further exemplified embodiment of connecting elements  60 ,  64 , in which the first connecting element  60  and the second connecting element  64  have an identical construction with respect to their shape. The connecting elements  60 ,  64  comprise a substantially arrow-shaped cross section, the arrow tips  84  and  86  respectively of which point away from the tray body  4 . The connection of two adjacent trays  2  to one another is performed in this exemplified embodiment in the manner described above with reference to FIG.  15 . 
     In comparison with the exemplified embodiment shown in FIG. 15, the exemplified embodiment shown in FIG. 16 however has the advantage that, by virtue of t he symmetric al design of the connecting elements  60 ,  64 , the first connecting elements  60  of the tray  2  can be connected both with the first connecting elements  60  and also with the second connecting elements  64  of an adjacent tray, whereas in contrast in the exemplified embodiment shown in FIG. 15, with the connecting elements  60 ,  64  having a different design, a connection of two adjacent trays  2  is only possible if in each case a first connecting element  60  of a tray  2  is opposite a second connecting element  64  of an adjacent tray. 
     FIG. 17 shows a plan view of a tray  4  with the connecting elements shown in FIG.  16 . 
     It can be seen that the connecting elements  60 ,  64  are disposed on opposite sides of the tray body  4  and in pairs in each case. However it is basically sufficient if in each case just one connecting element  60 ,  64  is provided for each side of the tray. Moreover it can be seen that the cross section of the connecting elements  60 ,  64  increases outwardly along the side of the tray. 
     FIG. 18 shows a view from underneath in FIG. 17 of the tray shown in FIG. 17 without receiving part  26 , wherein the arrow-shaped cross section of the connecting elements  60 ,  64  can be seen. 
     FIG. 19 shows a view from the right in FIG. 17, wherein it can be seen that the cross section of the second connecting elements  64  is enlarged upwardly and downwardly along the side of the tray. 
     FIG. 20 shows a detail from FIG. 19 in the region of the connecting element  64  on the left in FIG.  19 . It serves to illustrate the design of the connecting element  64 . Moreover in FIG. 20 it can be clearly seen that the receiving part  26  in this exemplified embodiment comprises an edge part  34  which in the region of its free end comprises an outwardly pointing edge region  88 . Moreover in this exemplified embodiment the edge part  34  of the receiving part  26  is guided by its end faced towards the tray body  4  not in grooves formed on the upper side of the handles  10 ,  12 , but on an edge of the handle  12  extending in the displacement direction. The edge part  36  with its end faced towards the tray body  4  is guided in a corresponding manner on an edge of the handle  10 . 
     A stop for limiting the displacement of the receiving part  26  in relation to the tray body  4  is formed by the fact that the second connecting element  64  extends upwardly in the region of the edge of the handle  12 . 
     The receiving part  26  may also be used without the tray body  4 , as represented in FIG.  21 . The receiving part  26  may for example be supported by its edge regions  88  of its edge parts  34 ,  36  on an edge bead  90  of a table top  92  of a passenger table  94  in an aeroplane. The receiving part  26  is then securely retained on the passenger table  94 . 
     To prevent the receiving part  26  sliding off the tray body  4 , clamping means for connecting the receiving part  26  to the tray body  4  by clamping may be provided. FIG. 22 shows a first exemplified embodiment of such clamping means, in which the clamping means are formed by a clamp  96  moulded on the handle  12 , which in the clamping position engages over the edge region  88  of the edge part  34  of the receiving part  26 . In this manner the receiving part  26  is reliably prevented from sliding off the tray body  4 , with a displacement of the receiving part  26  in the displacement direction, i.e. perpendicular to the drawing plane in FIG. 22, also being possible. 
     Represented in FIG. 23 is a further exemplified embodiment of the clamping means, in which the clamp  96  is constructed as a separate part and in the clamping position engages in clamping fashion over the edge  8  of the tray body  4  or the handle  12  and the edge region  88  of the edge part  34  of the receiving part  26 . The clamp  96  may be made from metal, for example. 
     Represented in FIG. 24 is a detail in the region of the edge  8  of the tray body  4  of a further exemplified embodiment of the tray body  2 . In this exemplified embodiment the tray body  4  in the region of its edge  8  is provided with support parts  98 , which project over the under side of the tray body  4 . The tray body  4  is supported by these support parts  24  on a rail  95  of a slide-in compartment  97  of a trolley, so that the tray body  4  is disposed higher in relation to the rail  95  than would be the case if the tray were supported directly by the underside of the handle  12  on the guide rail  95 . This may be necessary by virtue of the construction of the slide-in compartments of some trolleys. Depending on how the slide-in compartments of the respective trolley are constructed, the tray body  4  therefore comprises either support parts  98  or is supported directly by the handles or another part of the tray body in the slide-in compartment of the trolley. 
     FIG. 25 shows a plan view of a tray body  4  of a further exemplified embodiment of the tray  2  specified by the invention. The first receiving surface  6  comprises a shaped portion  20 , which is formed by a depression and limits a standing surface  24  which is adapted to the outer contour of the base of a meal container  100 . A narrow side  102  of the meal container  100  comprises a recess  104 , which is shaped to complement the opposite narrow side  106  of the meal container  100  in such a manner that when several similar meal containers are situated on a tray  2 , the meal container  100  with its narrow edge  106  abuts the recess  104  of an adjacent meal container  108  with form fit. By the form-fit abutment of the meal container  100  against the meal container  8  in conjunction with the shaped portion  20 , the retention of the meal containers  100 ,  108  on the tray  2  is improved, so that even when the tray  2  is tilted the meal containers  100 ,  108  do not slide in FIG. 6 
     The area of the tray body may correspond, for example, to roughly ⅔ the area of a conventional tray. Then four such trays specified by the invention may be contained one behind the other in a slide-in compartment of a conventional trolley. The area of the receiving part  26  may, for example, correspond to roughly ⅓ the area of a conventional tray. In this case six such receiving parts may be used in a slide-in compartment of a conventional trolley.