Multiple level carton box assembly for pizza or the like

Abstract

The multiple level carton box assembly consists of a series of open carton boxes, stacked one on top of the other so that the base (5) of each carton box acts as a serving tray and also becomes the cover of the adjacent carton box below. The carton boxes are secured to each other by means of vertical interlocking tongues (7C, 9C) extending above the front back side walls (7, 9) of each carton box which are inserted and wedged into the slots (7D, 9D) on the base (5) of the adjacent carton box above thus interlocking and stabilizing the assembly of carton boxes. Stability of the embodiment is attained by the folding corners (1, 2, 3, 4) which due to the double fold provide firm support of the adjacent carton box above as well as the horizontal semicircular tongues (7E, 7F, 9E, 9F) of each carton box which provide added support to the adjacent carton box above and thus prevent bending or collapsing of the embodiment. The multiple level carton box assembly is closed by only one cover (11) which is placed on the uppermost carton box.

Description

The invention for which we wish to obtain a patent, is a multiple level carton box assembly, that is an embodiment of several vertically engaged interlocking parallel levels of carton boxes (trays), horizontally arranged in a series of one on top of the other, enabling the base (floor) of each carton box to act as a serving tray and also to become the cover of the adjacent box (tray) below. The carton boxes (trays) of our multiple level carton box assembly are secured (interlocked) to each other by means of vertical interlocking tongues extending above the front-back side walls of each carton box (tray) which penetrate the slits-slots of the base of the adjacent carton box (tray) above thus creating an embodiment, interlocking and stabilizing the multiple level carton box assembly in place and securing it against shifting, sliding, separation, bouncing or any other movement during transport. The multiple level carton box assembly is closed by only one cover which is placed on the uppermost carton box (tray) of the assembly, where the vertical interlocking tongues extend above the front-back side walls ready to engage and interlock the cover to the embodiment for the distribution of pizza, other takeaway foods and pastry.

Single level carton boxes for the distribution of pizza have been in the market since long ago. It has been established however, that with the use of such single-level boxes there is considerable waste of material, time and money. Furthermore, it is also established that the transport of a single pizza, requires its own separate box as well as time for its assembly.

Particularly, we have researched the U.S. Pat. No. 4,984,734, date of patent Jan. 15, 1991, of inventor Kenneth J. Zion, which requires an excessive amount of cardboard for the construction of each carton box and furthermore, the locking device of the carton boxes to one another is not safe for two reasons. First, because the locking flaps simply surround the adjacent carton box above without penetrating its base and therefore there is no stability in the stack, and second because the size of the flaps is not sufficient to withstand the weight and the heat from the pizza in the boxes above. This second fault is also evident in the design of the top cover which does not have any slots through which the flaps can slide to secure the cover which therefore can easily slide off with any vibration or movement during transport. The multiple level carton box assembly of our invention has both vertically interlocking “tongues” which penetrate the base of the adjacent box (tray) above and stabilize the assembly against shifting, sliding, separation, bouncing or any other movement and horizontal supporting semicircular ‘tongues” which allow each carton box (tray) to withstand the weight and the heat of the pizza in the adjacent carton box (tray) above without touching or crushing the pizza in the carton box (tray) below. The multiple level carton box assembly requires only one cover on the uppermost carton box (tray). This cover locks in place by the penetration of the vertically interlocking tongues of the uppermost carton box (tray) into the respective slits-slots on the cover thus securing the entire embodiment.

The advantages of our multiple level carton box assembly are as follows:

First: Financial and ecological benefits. A conventional single carton box with its individual cover, requires 3,240 cm² of cardboard. In our invention, a carton box of the same capacity requires 2,850 cm² of cardboard that is 390 cm² less cardboard or savings of 12%. For an order of two pizzas the conventional pizza carton boxes require 6,480 cm² of cardboard while our multiple level carton box assembly, due to the use of a single cover, drops to 4,605 cm², a difference of 1,875 cm², that is savings of 29%. With a three-box multiple level carton box assembly (order of three pizzas), we have savings of 34% while with a four-box multiple level carton box assembly (order of four pizzas) the savings reach 37%. Furthermore, our invention achieves time saving in its assembly of up to 60% compared to that of conventional packaging. The savings in material result in cost reduction in the production of the multiple level carton box assembly which passes on to the business owner of pizza parlors or other food establishments and in turn to the consumer. Thus a chain of double financial benefit is achieved, since less material means less quantity of natural resources being used (wood) and a decrease in the quantity of disposable material being produced with all the environmental advantages that result thereof.

Second: Storage Benefits

Because the carton boxes (trays) of the multiple level carton box assembly are stored flat (open), thousands of carton boxes (trays) can be stored in the place of business requiring very little storage space while box assembly is extremely simple and fast for whatever number of carton boxes (trays) may be required.

Third: Production Benefits

The manufacturer constructing the flat cut outs for the carton boxes (trays) of the multiple level carton box assembly does not need large storage space during production because the size of the cardboard cut out for each carton box (tray) is much less than that of conventional pizza boxes due to the fact that the cover is a separate component. There is also no waste of material nor large volumes of left over scraps for disposal.

Fourth: The side walls of each carton box (tray) of the multiple level assembly have a meticulously designed construction and reinforcements to support the base of the adjacent carton box (tray) above thus eliminating the possibility of bending of the base due to the weight of the pizza because each base rests firmly on the rigid folding corners, the side walls as well as on horizontal semicircular “tongues” and vertical interlocking tongues of the adjacent carton box (tray) below which provide additional support.

Fifth: Minimal Time for Assembly

The store owner does not need to assemble the carton boxes (trays) of the multiple level carton box assembly in advance but simply to place the pizza on each base, raise the side walls, fold the corners and with very little pressure stabilize them by entering the small “teeth” on the edges of the corners into the proper slots on the base of the carton box (tray) whereupon the carton box (tray) is ready to receive the top which is also the base of the adjacent carton box (tray) above and thus repeat this simple process until the desired number of levels is achieved and finally with a single cover close and lock the entire multiple level carton box assembly forming a rigid embodiment.

Sixth: Distribution Benefits

With the successive placing of pizzas in multiple level carton boxes (trays), maintenance of satisfactory temperature levels is achieved, so that the orders are delivered to the consumer at satisfactory temperature levels because there are side ventilation holes on each carton box (tray) which help maintain the desired temperature steady and prevent sogging.

Seventh: Serving Benefits

Serving becomes easy because the base of each carton box of the multiple level carton box assembly acts as a tray with no space taken up by the cover since the cover can be simply lifted off and discarded because the cover is a separate component not attached to the base as is the case in conventional pizza boxes where the base and cover are one component. In the multiple level assembly with the lifting of each carton box the one underneath remains open as a tray, etc.

Eighth: Stability of the Shape and Surface of Pizza

Each carton box (tray) of the multiple level carton box assembly interlocks safely into the base of the adjacent carton box (tray) above thus creating an embodiment, preventing distortion of the stack due to the presence of vertically interlocking tongues which penetrate and interlock into slits-slots, slots on the base of the adjacent box (tray) above thus securing all carton boxes (trays) of the multiple level assembly in place. Furthermore, the rigid folding corners and the horizontal semicircular tongues ensure excellent surface resting of each carton box (tray) on top of the other preventing bending or collapsing of the carton boxes trays (above) and maintaining the pizza flat.

Ninth: Stacking Two or More Orders.

With our multiple level carton box assembly, two or more orders can be combined for delivery, stacked vertically so that the cover of each order acts as a divider for the next order above also securing the separate orders from shifting, sliding during transport by the extending above the cover vertical interlocking tongues which lock into the slits-slots on the adjacent base of the carton box (tray) of the next order above.

Tenth: Variety of Shapes, Sizes and Material

Our multiple level carton box assembly allows for; choice of any geometric shape of box (square, rectangular, hexagonal, octagonal even triangular).

Choice of Any Desired Size.

Besides corrugated cardboard, any other material which can be cut and bent to take the shape of a box can be used.

The above characteristics are the “avant-garde” of our invention giving our multiple level carton box assembly a uniqueness which we have arduously worked for, aiming to provide a beneficial packaging alternative to the entire industry of production and distribution of pizza as well as other food products and pastry.

DESCRIPTION OF THE CARTON BOX COMPONENTS

All component numbers refer to FIG. 1 unless otherwise stated.

1, 2, 3, 4. Folding corners with teeth 1A, 2A, 3A, 4A respectively

1A. Tooth which is inserted in slot 1B

2A. Tooth which is inserted in slot 2B

3A. Tooth which is inserted in slot 3B

4A. Tooth which is inserted in slot 4B

5. Carton box base (floor)

6, 8. Opposite side walls

6A, 6B, 8A, 8B. Folding inwards corner triangles of side walls covered by the folding corners 1, 2, 3, 4, for bracing of side walls

7, 9. Front-back side walls

7A, 7B, 9A, 9B. Folding inwards corner triangles of side walls covered by the folding corners 1, 2, 3, 4, for bracing of side walls

7C, 9C. Vertically interlocking “tongues” which penetrate slits-slots 7D, 9D respectively of base 5 of the adjacent box (tray) above

7G, 9G. Vertically interlocking “tongues” which penetrate slots 7H, 9H respectively of base 5 of the adjacent box (tray) above, FIG. 11

7J, 9J. Vertically interlocking “tongues” which penetrate slots 7K, 9K respectively of base 5 of the adjacent box (tray) above, FIG. 17

7E, 7F, 9E, 9F. Horizontal semicircular “tongues” which bend inwards at a right angle to the vertical side walls (parallel to the box base) for support of the base above and to prevent bending of same

10. Round ventilation holes

11. Cover, FIG. 2

11A, 11B. Slits-slots of cover 11 where vertical interlocking tongues 7C, 9C of the uppermost carton box (tray) are inserted respectively

12. Another type of cover, FIG. 3

12A, 12B. Slits-slots of cover 12 where vertical interlocking tongues 7C, 9C of the uppermost carton box (tray) are inserted respectively

12C,12D. Side flaps of cover 12 which bend downwards and are inserted inside the uppermost carton box (tray) of the assembly. To be noted that the size and shape of the flaps may vary according to the size, shape and use of the carton box (tray).

13. Cover, FIG. 12, which accompanies box base of FIG. 11

13A, 13B. Slots of cover 13, FIG. 12, where vertical interlocking tongues 7G, 9G of the uppermost carton box (tray) are inserted respectively

14. Cover, FIG. 18, which accompanies box base of FIG. 17

14A, 14B. Slots of cover 14, FIG. 18, where vertical interlocking tongues 7J, 9J of the uppermost carton box (tray) are inserted respectively

DESCRIPTION OF MULTIPLE LEVEL CARTON BOX ASSEMBLY

All component numbers refer to FIG. 1 unless otherwise stated.

In FIG. 1, we can observe the various components of the carton box (tray) of the multiple level carton box assembly, numbered as they appear on page 5, under the section titled “Description of the Carton Box Components”.

Side walls 6, 7, 8, 9 must be bent (raised) vertically to the base of the carton box (tray), while triangles 6A, 6B, 7A, 7B, 8A, 8B, 9A, 9B are to be bent inwards along the side walls so as to be covered by folded corners 1, 2, 3, 4.

Corners 1, 2, 3, 4, are to be bent vertically to the base of the carton box (tray). Then they are to be folded in half along the double discontinuous lines.

The semicircular tongues 7E, 7F, 9E, 9F must be bent inwards vertically to the side walls so as to be in a horizontal position parallel to the base of the carton box (tray). The discontinuous lines on the figures show the places where the side walls, triangles and tongues bend (are folded).

Following the above clarifications, we will now proceed to describe how the multiple level carton box assembly is constructed.

FIG. 1 shows the flat cut-out surface of the carton box (tray), before assembly, made of corrugated cardboard as it will be delivered from the manufacturer. We raise (bend vertically) the two opposite side walls 6, 8 and side wall 7 with our palms on corners 1, 4 and with our fingers we bend inwards triangles 6B, 7A, 7B, 8A. We then raise (bend) corners 1, 4, fold them in half inwards along the double discontinuous lines so as to cover triangles 6B, 7A, 7B, 8A and we then press teeth 1A, 4A into their respective slots 1B, 4B on base 5 so that the folded corners are safely secured in place. We then raise the last side wall 9, and in the same manner, we bend inwards triangles 6A, 9B, 9A, 8B, we raise corners 2, 3 and fold them in half along the double discontinuous lines covering triangles 6A, 9B, 9A, 8B and we press teeth 2A, 3A into their respective slots 2B, 3B on base 5. Finally, we bend the semicircular tongues 7E, 7F, 9E, 9F inwards so as to bring them to a horizontal position. The first carton box (tray) of the assembly is now constructed with its side walls rigidly secured to base 5. We continue to assemble the second, third, etc. carton boxes (trays) in the same manner.

Please note that the analytical description of the multiple level carton box assembly given in the preceding paragraph, in no way suggests that this is a time consuming process because in actuality the time required for the assembly of the carton box (tray) does not exceed 15 to 20 seconds, having placed the pizza in the box beforehand and repeating this simple process for as many carton boxes (trays) as necessary quickly, securely, safely but most of all economically.

The vertical interlocking tongues 7C, 9C of the front-back side walls of each carton box (tray), are inserted and lock into slits-slots 7D, 9D respectively on base 5 of the adjacent carton box (tray) above so stabilizing the multiple level embodiment against movement or vibration of any kind while cover 11, FIG. 2, covers the uppermost carton box (tray) of the assembly and is stabilized by vertical interlocking tongues 7C, 9C extending 15 above the uppermost carton box (tray) which are inserted into slits-slots 11A, 11B respectively. Using cover 12, FIG. 3, the vertical interlocking tongues 7C, 9C of the uppermost carton box (tray) are inserted into the slits-slots 12A, 12B respectively while flaps 12C, 12D are bent downwards and inwards along side walls 6, 8 of the uppermost carton box (tray) of the assembly thus securing the embodiment completely. Holes 10, FIG. 1, are used for ventilation purposes.

In FIG. 11, the vertical interlocking tongues 7G, 9G on the front-back side walls of each carton box (tray) have small indentations (cuts) on one side of the vertical interlocking tongues 7G, 9G in the same direction. These vertical interlocking tongues 7G, 9G, are inserted into slots 7H, 9H on base 5 of the adjacent carton box (tray) above and stabilize the assembly with a slight push sideways (shift). For this reason slots 7H, 9H are placed off center to allow the base 5 of the adjacent box above to be pushed sideways (shift) into vertical interlocking tongues 7G, 9G and lock and stabilize the embodiment of the multiple level carton box assembly for pizza, various other foods and pastry. Cover 13 of FIG. 12 covers the uppermost carton box (tray) of the assembly and interlocks in place by a sliding motion (shift) of vertical interlocking tongues 7G, 9G into slots 13A, 13B respectively of cover 13, FIG. 12, which are placed off center so that the cover can shift and lock into place thus securing the embodiment completely.

All other components and numbers of FIG. 11 are the same as those of FIG. 1 with all box components numbered and described under section titled “Description of Carton Box Components” on page 5.

In FIG. 17, the vertical interlocking tongues 7J, 9J on the front-back side walls of each carton box (tray) have small indentations (cuts) on opposite sides. These vertical interlocking tongues 7J, 9J, are inserted into slots 7K, 9K on base 5 of the adjacent carton box (tray) above and stabilize the assembly by rotation. For this reason slots 7K, 9K are placed off center in opposite directions to allow the base 5 of the adjacent carton box (tray) above to rotate into the vertical interlocking tongues, 7J, 9J and lock and stabilize the embodiment of the multiple level carton box assembly for pizza, various other foods and pastry. Cover 14 of FIG. 18, covers the uppermost carton box (tray) of the assembly and interlocks into place by rotation of the vertical interlocking tongues 7J, 9J into slots 14A, 14B respectively of cover 14, FIG. 18, which are placed off center in opposite directions so that the cover can rotate and lock into place thus securing the embodiment completely.

All other components and numbers of FIG. 17 are the same as those of FIG. 1, FIG. 11, with all box components numbered and described under section titled “Description of Carton Box Components” on page 5.

By referring to FIG. 1, FIG. 11, FIG. 17, we surmise that the vertical interlocking tongues can be of three different types. The first type of interlocking tongues (7D, 9D), FIG. 1, allows the adjacent carton box (tray) above to simply move on an up and down direction to interlock with the adjacent carton box (tray) below, the second type of interlocking tongues (7G, 9G), FIG. 11, requires a sliding movement (shift) of the adjacent carton box (tray) above to interlock with the carton box (tray) below and the third type of interlocking tongues (7J, 9J), FIG. 17, requires a rotating motion of the adjacent carton box (tray) above to interlock with the carton box (tray) below. The same applies to their respective types of covers (11, 12) FIGS. 2, 3, cover (13) FIG. 12, cover (14) FIG. 18.

DESCRIPTION OF ATTACHED FIGURES

FIG. 1. Flat carton box (tray) surface (unassembled) as it will be manufactured

Numbers are described under section titled “Description of Carton Box Components” on page 5

FIG. 2. Cover 11, with slits-slots 11A, 11B

FIG. 3. Cover 12 is a variation of cover 11 with slits-slots 12A, 12B and flaps 12C, 12D. To be noted that this particular size and shape of flaps is indicative only. The size and shape of the flaps may vary according to the geometric shape, size and use of the carton box (tray).

FIG. 4. Left-right side wall of carton box (tray) of FIG. 1

FIG. 5. Front-back side wall of carton box (tray) of FIG. 1

FIG. 6. Assembled single carton box (tray), uncovered

FIG. 7. Two-level carton box (tray) assembly, uncovered

FIG. 8. Single carton box (tray) with cover

FIG. 9. Two-level carton box (tray) assembly, where slots on base 5 are numbered 7D, 9D and vertical interlocking tongues are numbered 7C, 9C. The vertical interlocking tongue 7C, shown with a discontinuous line, is inserted into slit-slot 7D on base 5 of the carton box (tray) above, while vertical interlocking tongue 7C, shown by a continuous line, is inserted into slit-slot 11B of cover 11. Vertical interlocking tongue 9C is inserted into slit-slot 9D on base 5 of the carton box (tray) above while vertical interlocking tongue 9C is inserted into slit-slot 11A of cover 11.

FIG. 10. Two-order assembly. (Double order R. Single order M) Separation cover 11 and top cover 11 on single order.

FIG. 11. Flat cut out carton box (tray) surface (unassembled) with differently shaped vertical interlocking tongues than those of FIG. 1.

On the flat cut out carton box (tray) surface of FIG. 11 the vertical interlocking tongues 7G, 9G have indentations (cuts) on one side into which slides (shifts) base 5 of the adjacent carton box (tray) above and locks in place to also form the cover of the carton box (tray) below.

Slots 7H, 9H on base 5 of FIG. 11 are placed off-center in the same direction to match the indentations (cuts) of the vertical interlocking tongues 7G, 9G of the adjacent carton box (tray) below so as to penetrate slots 7H, 9H of base 5 of the adjacent carton box (tray) above and slide (shift) to interlock in place.

Other than the difference in the shape of the vertical interlocking tongues 7G, 9G and the position of slots 7H, 9H, all other components and numbers are the same as those in FIG. 1.

FIG. 12. Cover 13 which solely accompanies the carton box (tray) type of FIG. 11. This cover has slots 13A, 13B placed off center on both sides in the same direction to match the position of the indentations (cuts) in the vertical interlocking tongues 7G, 9G so it can slide (shift) into slots 13A, 13B and interlock in place.

FIG. 13. Front-back side wall of carton box (tray) of FIG. 11

FIG. 14. Two-level carton box (tray) assembly and cover 13 before stacking

FIG. 15. Stacking of the two carton boxes (trays) and cover 13 (order of two pizzas) showing how the vertical interlocking tongues 7G, 9G, slide into slots 7H, 9H, ready to be slided (shifted) in place to interlock the assembly.

FIG. 16. Interlocked two-level carton box (tray) assembly with cover 13, as it appears after sliding (shifting) into place.

FIG. 17. Flat cutout carton box (tray) surface (unassembled) with differently shaped vertical interlocking tongues than those of FIG. 1, FIG. 11.

On the flat cutout carton box (tray) surface of FIG. 17 the vertical interlocking tongues 7J, 9J have indentations (cuts) in opposite directions into which rotates base 5 of the adjacent carton box (tray) above and interlock in place to also form the cover of the adjacent carton box (tray) below.

Slots 7K, 9K on base 5 of FIG. 17 are placed off center in opposite directions to match the indentations (cuts) of the vertical interlocking tongues 7J, 9J of the adjacent box (tray) below so as to penetrate slots 7K, 9K of base 5 of the adjacent box (tray) above and rotate to interlock in place. Other than the difference in the shape of the vertical interlocking tongues 7J, 9J and the position of slots 7K, 9K, all other components and numbers are the same as those in FIG. 1, FIG. 11.

FIG. 18. Cover 14 which solely accompanies the carton box (tray) type of FIG. 17. This cover has slots 14A, 14B placed off center on both sides in the opposite direction to match the position of the indentations (cuts) in the vertical interlocking tongues 7J, 9J so it can rotate into slots 14A, 14B and interlock in place.

FIG. 19. Front side wall of carton box (tray) of FIG. 17

FIG. 20. Back side wall of carton box (tray) of FIG. 17.

Claims

1. The multiple level carton box assembly for pizza, various other foods and pastry consists of a series of open carton boxes each of which interlocks into the adjacent carton box above so that the base (floor) of each carton box acts as a serving tray and also becomes the cover of the adjacent box below thus forming a rigid embodiment. The carton boxes (trays) of our multiple level carton box assembly are secured to each other by means of vertical interlocking tongues extending above the front-back side walls of each carton box (tray) which penetrate and lock into cuts on the edges of the front-back side walls of the base of the adjacent carton box (tray) above called “slits-slots”. These “slits-slots” are cuts of different thickness. The center part called “slot” is thicker to guide the vertical interlocking tongue into the slot while the “slits” which are much thinner cuts on either end of the slot wedge the vertical interlocking tongue in place to secure it against movement. By these interlocking devices, the multiple level carton box assembly attains a rigidity which secures it from shifting, sliding, separating, bouncing or any other movement during transport and the assembly becomes an embodiment.

The folding corners of each carton box (tray) of the multiple level carton box assembly, due to the double fold of each corner, provide reinforcement to the adjacent carton box (tray) above so the entire embodiment attains stability and is secure from bending or collapsing due to the weight and heat of its contents:

Additional horizontal support is provided by means of horizontal semicircular tongues located on the front-back side walls, placed equidistantly on either side of the vertical interlocking tongues. These horizontal semicircular tongues provide added support for the adjacent carton box (tray) above which is maintained flat and secure against collapsing into the adjacent carton box (tray) below.

The assembly is closed by only one cover which is placed on the uppermost box (tray) of the embodiment secured by means of slits-slots, slots into which the vertical interlocking tongues of the adjacent box (tray) below penetrate and lock into the assembled embodiment.

Each carton box (tray) of our multiple-level carton box assembly consists of;

a base (5), side wall (6) with triangles (6A), (6B) on each end, side wall (8) opposite side wall (6) with triangles (8A), (8B) on each end, side wall (7) with triangles (7A), (7B) on each end, vertical interlocking “tongue” (7C) in its center and horizontal semicircular tongues (7E), (7F) placed equidistantly on either side of vertical interlocking tongue (7C), side wall (9) opposite side wall (7) with triangles (9A), (9B) on each end, vertical interlocking tongue (9C) in its center and horizontal semicircular tongues (9E), (9F) placed equidistantly on either side of vertical interlocking tongue (9C), folding corners (1), (2), (3), (4) with teeth (1A), (2A), (3A), (4A) respectively, slits-slots (7D), (9D) and slots (1B), (2B), (3B), (4B) on base (5), one single cover (11) with two slits-slots (11A), (11B) to close the uppermost carton box (tray) of the embodiment.

There must be a minimum of two vertical interlocking tongues (7C), (9C) and a minimum of two slits-slots (7D), (9D) on base (5). The number of required horizontal semicircular tongues varies according to the geometric shape of the carton box (tray).

2. The multiple-level carton box (tray) assembly for pizza, various other foods and pastry, according to claim 1, is characterized by the existence on each box of the assembly of two types of “tongues”; vertical interlocking tongues (7C, 9C), (7G, 9G), (7J, 9J), and horizontal semicircular “tongues” (7E), (7F), (9E), (9F), the existence of folding corners (1), (2), (3), (4) with teeth (1A), (2A), (3A), (4A) respectively, side walls (6), (7), (8), (9) with triangles (6A) (6B), (7A) (7B), (8A) (8B), (9A) (9B), on each end and slits-slots (7D), (9D), slots (7H, 9H), (7K, 9K), and slots (1B), (2B), (3B), (4B) on base (5) of each carton box (tray).

3. The multiple-level carton box assembly for pizza, various other foods and pastry as described in claims 1, 2, is characterized by the placement of one carton box (tray) on top of the other to form an interlocking assembly of at least two carton boxes (trays) in such way so the vertical interlocking tongues (7C), (9C) of the adjacent carton box (tray) below to penetrate the slits-slots (7D), (9D) on base (5) of the adjacent carton box (tray) above and by so doing we see that base (5) of the adjacent carton box (tray) above is interlocked into the base (5) of the adjacent carton box (tray) below to become its cover supported evenly underneath by the horizontal semicircular tongues (7E), (7F), (9E), (9F) of the adjacent carton box (tray) below.

4. The multiple level carton box assembly according to claims 1, 2, 3 is characterized by the stability of the form of each carton box (tray) because the folding corners (1), (2), (3), (4) of each carton box (tray) lock into place securely by the insertion of their end teeth (1A), (2A), (3A), (4A) into slots (1B), (2B), (3B), (4B) respectively on base (5) and therefore they attain a rigidity which allows them to maintain the side walls (6), (7), (8), (9) firmly perpendicular to the base (5). Furthermore, corners (1), (2), (3), (4), due to the double fold, provide firm support to the adjacent carton box (tray) above so the entire embodiment attains stability and is secure from bending or collapsing due to the weight and the heat of its contents.

5. The multiple level carton box assembly according to claims 1, 2, 3, is characterized by the even support of each carton box (tray) because the horizontal semicircular tongues (7E), (7F), (9E), (9F), of the adjacent carton box (tray) below provide added support and eliminate the possibility of bending or collapsing from heat of base (5) of the adjacent carton box (tray) above.

6. The multiple-level carton box assembly, according to claims 1, 2, 3, is characterized by the stability of the assembly, because the vertical interlocking tongues (7C), (9C) of each carton box (tray) penetrate the slits-slots (7D), (9D) of the adjacent carton box (tray) above and they are wedged into the thin slits (thin cuts) which exists on either side of each slot thus securing the vertical interlocking tongues (7C), (9C) in place to form a rigid embodiment secure from any movement.

7. The multiple-level carton box assembly for pizza, various other foods and pastry according to claim 1, is characterized by the versatility of its shape which allows it to take the shape of any geometric polygon i.e., square, rectangular, triangular, hexagonal, octagonal etc. Furthermore, the carton box (tray) of the multiple level assembly, besides corrugated cardboard, can be constructed from any other material which can be bent and folded to take the shape of a box. Any change in the shape and size of the carton box (tray) does not create any technical difficulty in its construction because the design of the flat surface of the box permits constriction in any shape and size with all its interlocking characteristics intact. To be noted that there are variations in the manner in which the corners fold and the number of interlocking devices required according to the geometric shape of the carton box (tray).

8. The multiple-level carton box (tray) assembly for pizzas, various other foods and pastry according to claim 2 is characterized by vertical interlocking tongues (7G), (9G) on the front-back side walls (7), (9) which have indentations on one side in the same direction to be inserted into slots (7H), (9H) respectively of base (5) of the adjacent carton box (tray) above by a shifting (sliding) movement. For this reason slots (7H), (9H) are placed off center on base (5) in the same direction to enable the vertical interlocking tongues (7G), (9G) to shift and interlock into the slots (7H), (9H). Cover (13) with slots (13A), (13B) into which vertical interlocking tongues (7G), (9G) of the uppermost carton box (tray) are inserted is shifted (slided) sideways accordingly to lock in place and cover the assembly, forming a rigid embodiment.

9. The multiple-level carton box assembly for pizzas, various other foods and pastry according to claim 2 is characterized by vertical interlocking tongues (7J), (9J) on the front-back side walls (7), (9) which have indentations (cuts) on one side in opposite direction to be inserted into slots (7K), (9K) respectively of base (5) of the adjacent carton box (tray) above by rotation. For this reason slots (7K), (9K)are placed off center on base (5) in the opposite direction to enable the vertical interlocking tongues (7J), (9J), to rotate and interlock into the slots (7K), (9K). Cover (14) with slots (14A), (14B), into which vertical interlocking tongues (7J), (9J) of the uppermost carton box (tray) are inserted rotates to lock in place and cover the assembly, forming a rigid embodiment.

10. The method of assembly of the multiple level carton boxes for pizza, various other foods and pastry is characterized by the following steps:

Step one: We bend (raise) two adjacent side walls, (7), (8), perpendicularly to the base (5), bend (fold) inwards triangles (7B), (8A), bend and fold in half corner (1) covering triangles (7B), (8A) and securing tooth (1A) of corner (1) into slot (cut) (1B) on base (5).

Step two: We repeat the process of step one for side walls (6), (9) and corner (3) that is we bend (raise) side walls (6), (9) perpendicularly to the base (5), bend (fold) inwards triangles (6A), (9B), bend and fold in half corner (3) covering triangles (6A), (9B) and secure tooth (3A) of corner (3) into slot (cut) (3B) on base (5).

Step three: With side walls (8), (9) already in upright position, we bend (fold) inwards triangles (8B), (9A) and we bend and fold in half corner (2) and lock tooth (2A) into slot (cut) (2B) on base (5).

Step four: With the side walls (6), (7) already in upright position, we bend (fold) inwards triangles(7A), (6B), bend and fold in half corner (4) covering triangles (6B), (7A) and secure tooth (4A) into slot (cut) (4B) of base (5). After the above steps we bend inwards the horizontal semicircular tongues (7E), (7F), (9E), (9F) so as to bring them to a horizontal position and the first carton box (tray) is now completely assembled.

We place one carton box (tray) on top of the other in such a way so that the vertical interlocking tongues (7C), (9C) of the bottom carton box (tray) to penetrate the slits-slots (7D), (9D) on base (5) of the adjacent carton box (tray) above and we immediately see that the base (5) of the second carton box (tray) interlocks with the carton box (tray) below, becomes the cover of the adjacent carton box (tray) below and it rests on the horizontal semicircular tongues (7E), (7F), (9E), (9F) of the bottom carton box (tray).

This procedure is repeated for the third, fourth etc. carton boxes (trays) so that the assembly is completed for as many levels as they are necessary forming a rigid embodiment for multiple orders of pizza, various other foods and pastry.

11. The use of the multiple-level carton box assembly for delivery of pizzas, various other foods and pastry according to claims 1, 2, 3, 6, is characterized by the fact that during delivery of the food products there is no distortion of the form of each assembled carton box (tray) and the embodiment which is composed of at least two assembled carton boxes (trays) is maintained without shifting or bending which could be caused from bouncing, shifting, sliding, compression or any other cause even when the transportation vehicle moves on rough roads, because vertical interlocking tongues (7C, 9C), (7G, 9G), (7J, 9J) interlock into slits-slots (7D, 9D), slots (7H, 9H), (7K, 9K) respectively on base (5).