DK201700080U3 - Hot food transport packaging - Google Patents

Abstract

The present invention relates to a stackable transport package for hot foods, especially for pizza. The packaging has a side wall corresponding to a bottom part, a side wall corresponding to a lid part, and at least one vent opening in the lid part, and in the closed condition of the transport packaging, the bottom part and the lid part intervene. The stackable hot food stackable packaging (1A) comprising side walls (19, 21, 24) corresponding to the bottom portion (2), side walls (7, 9, 11, 13) corresponding to the lid portion (3), and has at least one vent opening (5), is new in that several vent openings (5) are distributed along the rim of the lid portion (3), and at least one spacer (15) is disposed in the edge region of the vent openings (5) as in the transport packaging ( 1A) the closed condition extends beyond the outer surfaces (AD) of the lid part and that the support surfaces (15.1) of the spacers (15) are arranged in the bottom surface (BF) of the bottom part (2).

Description

Hot food transport packaging

The present invention relates to a stackable transport package for hot foods, especially pizza, with a bottom part having side walls, a lid part having side walls, and with at least one vent opening in the lid part, where the bottom part and the lid part interlock in the closed state of the transport packaging.

Such transport packaging is known e.g. from DE 9411346 U1. The transport packaging has a circular vent opening both in the bottom wall of the bottom part and in the lid part of the lid part, so that correspondingly stacked transport packages on top of each other enable a mean-shaped vent path through the stack. Preferably, this stack is carried in a corresponding transport box which provides for forced ventilation by means of a blower and for the absorption of the steam into a silica gel. The transport packaging is used predominantly to transport a hot pizza, which must also have some freshness and crispiness after the transport process. The vapor, which is usually precipitated in a closed transport package, undoubtedly in most cases causes the final product dispensed to lose brittleness and leave a rather soft impression. Adequate ventilation to evaporate the steam provides a suitable remedy. However, the known transport packaging is associated with a great technical effort and requires an accurate stacking of the individual transport packages in order for the vent openings to align with one another. In addition, vent openings in the bottom part of the transport packaging are rather a disadvantage, because possibly oils from the hot food, respectively. fat can come out in this place. Rather, in conventional pizza trays, the vent openings are positioned laterally due to stackability, because the superposed packages otherwise make evaporation difficult. However, laterally located openings are insufficient because the vapor first settles on the inside of the lid portion and condenses, so that moisture drips back onto the hot food.

Another variant with vent openings in the lid part is known from DE 9206059 U1. In a described variant (Fig. 11), fasteners on the bottom part and corresponding slots on the lid part are used for fastening the lid part. The slots of the lid portion have semicircular bulges inward, which serve as vent openings. However, the bottom part is provided with inclined side walls, so that the bottom surface becomes so small that the vent openings in the underlying transport packaging are not covered by stacking the transport packaging. The material cost of such packaging is similarly high because the lid portion must be larger than the hot food requires.

It is now an object of the present invention to provide a stackable transport packaging of the type mentioned at the outset which, with less material and cost, provides good ventilation.

This object is achieved according to the invention by providing several vent openings disposed on the rim of the lid part and at least one spacer formed together with the lid part and / or the bottom part and provided in the conveyor packaging in the edge area of the vent openings. the closed condition extends beyond the cover surface and the support surfaces of the spacers are disposed within the bottom surface of the base. Thus, when stacking the transport packaging, the spacers hold the top of the cover portion and the underside of the bottom portion of the transport package disposed therebetween. In this way steam can be directed upwards out of the lid part because a suitable gap is formed between the transport packages. In addition, this type of vent does not require any openings in the bottom part through which hot oils or grease can escape. Furthermore, the lid part and the bottom part, except for the size difference necessary for the engagement in each other, can be substantially equal, so that they e.g. from ordinary pizza boxes known straight sidewalls can still be used. Whether the spacer support surfaces are positioned within the bottom surface of the base can be determined by simply looking from above. When all the active support surfaces are within the outline of the bottom surface of the bottom part, this characteristic is fulfilled. In the sense of this generation, the vent opening only means an opening which is purposefully inserted for venting purposes in the lid part (as far as possible the lid wall). An opening which primarily serves to join two structural elements respectively. components and, rather coincidentally, still release a certain gap (such as by a plug and a slot), this is not to be understood.

The location of the spacers on the peripheral area of the vent openings also ensures that the vent openings are kept as far as possible, even if the packaging should sink slightly elsewhere.

A particularly simple variant for effecting a design according to the manufacture of the spacers consists of designing a spacer as straight bridged extension of a side wall of the lid portion and / or the bottom portion, the support surface being formed by the spacer and substantially parallel to the lid surface. side of the spacer. The corresponding sidewall is simply extended somewhat upwards at that particular location and consequently protrudes beyond the outer surface of the lid. The extraction may be selected in time, but should be such that evaporation in sufficient quantity is possible so that any crispness of the hot food can be well preserved. Depending on whether the lid portion overlaps the bottom portion or vice versa, a correspondingly favorable choice of which side wall to extend is bridged to produce a spacer. Conveniently, the bottom portion and the lid portion can be viewed from above from a complementary polygon shape, with on each side of the polygon one, preferably two, spacers being arranged, and each side adjacent to one, preferably two, vent openings. By polygon shape is meant all shapes with multiple corners, starting with triangular over square to polygonal shape. The preferred use of two spacers on each side and the fact that they adjoin two vent openings ensure that complementary superimposed transport packages can be safely stacked and kept at a distance, and for a very good venting and sufficient discharge of steam.

In many such transport packaging, it has become fitting that the lid part engages the bottom part. For this reason, it is an advantage if the spacers are formed on the lid part. The side walls of the lid part which engage the bottom part are further stabilized by the bottom part so that the spacers also undergo a corresponding support. At the same time, with this placement, it is automatically ensured that the spacer support surfaces are positioned within the bottom surface of the base.

Preferably, a spacer can border immediately adjacent to a vent opening and together with a side wall of the lid portion form a circumferential area for the vent opening. This also extends the vent openings to the rim of the cover, but the spacers extend beyond them laterally to the rim. The proximity of the spacers to the vent openings further ensures that they are kept free in each case. Such stackable transport packages are often transported in a corresponding stack box (in the car or on moped). In this stack box the stacking of the transport packages on top of each other is possible very easily, so that an orientation of the bottom surface of the bottom part relative to the support surfaces of the spacers is also possible very easily. The stack box should support the vent. However, such a stack, where the transport packages are spaced apart, is no longer as simple to transport manually after removal from the stack box. Therefore, a further development is that the distance between two spacers on a side wall of the lid part and / or the bottom part and the location of the vent openings in the corner areas is such that another transport package rotated by 180% about a substantially common high axis and having the same outer dimensions, with the corners fitting between the spacers, the bottom underside of the upper conveyor packaging rests immediately on the low surface of the lower conveyor, the vent openings being open overlap free at least 50%, preferably at least 90% of the upper conveyor packaging, and n corresponding to the corner number of the polygon shape. Thus, the transport packages are disposed in relation to each other, whereby the spacers no longer act as spacers, but laterally overlap the sidewalls of the transport packaging placed thereon and consequently a slippage of the upper transport packaging is avoided. This principle idea is actually independent of the vent openings and simplifies manual transport of stacked transport packages, so the actual function of keeping the transport packaging at a distance is not absolutely necessary for this manual transport. In this version according to the invention it is undeniably a particular advantage that in this offset placement of the stacked transport packages, the vent openings are nevertheless not covered to a large extent, preferably they are even completely free. This means that further evaporation is also ensured during transport from e.g. the vehicle to the consumer's front door or in addition. In addition, without being further secured, this stack can be exposed to a significantly inclined position, without the individual transport packaging sliding apart. This was not possible in this form with normal transport packaging, e.g. usual pizza trays. This provides additional security for the manual transport. Of course, this stack variant can also be used as a normal transport variant.

In another embodiment, a vent opening extends substantially diagonally with distance to the corner in the corner region from a side wall to the adjacent side wall, and there is a corner reinforcement forming in the corner a portion of the lid wall and connecting the two side walls. . The corner reinforcement consists essentially of a displacement of the lid wall previously interrupted by the vent opening. In this way, the corners of the lid part are stabilized durably, which also has the effect that the vent openings retain their shape. Diagonally arranged vent openings also provide a wide evaporation from sidewall to sidewall that can be made relatively narrow and does not extend as far into the center of the lid portion.

Furthermore, in a stackable transport packaging, which is particularly applicable to viewed from above circular foods, such as pizza etc., a vent opening has a long hole shape extending from a side wall to an adjacent side wall, where the side edge of the vent opening , which is closest to the center of the lid part, has a contour towards the nearest corner convex. Accordingly, this side edge takes up the outer shape of the circular food so that it is covered as far as possible. In the most favorable case, a food disposed on the bottom portion properly does not see through the vent opening in any position of the transport package viewed from above against the lid portion. In this way, it must be largely prevented that particles etc. which fall through the vent opening can land on the food.

This can be further enhanced by the fact that the convex side edge has a distance to the center of the lid portion which is greater than half the width of the bottom surface. Should the position of the food not still be secured on the bottom part with other measures, the sidewalls themselves will stop. In this embodiment, then, in a substantially circular form of the food, it will always be ensured that the food is completely covered by the lid wall and does not appear in the area of the vent opening.

Another measure which provides additional security in this regard is that the convex side edge has a center radius of curvature less than half the width of the bottom surface. This can cause the vent opening to have a greater width in the region of the side walls than in its middle region. In each case, a greater distance from the food can then be observed in the middle area.

In order to ensure sufficient evaporation through a vent opening, the average width of a vent opening may be at least greater than five times the material thickness of the cover portion. Preferably, however, the average width is many times the thickness of the material.

In order to provide sufficient stability to the transport package upon stacking one another on top of the spacer support surfaces, it can be further worked on that the lateral side walls of the lid part have protruding foot sections with a support surface which, in the closed condition of the transport package, sits on the inside of the bottom wall of the bundle. Accordingly, a direct force transfer is made from the spacer to the bottom wall of the base by means of the side walls of the cover. The gap between the foot sections of the lateral sidewalls can also be used to allow the food in this area to be in direct contact with the bottom walls of the bottom portion. Hereby, depending on the design, a further position fixation of the food can be obtained. However, it is also possible at this location to insert additional openings (eg blow-in air slots) into the side walls of the bottom part, which are then not covered by the cover part.

A favorable design of the spacers works with the spacers having a distance to the nearest corner of 0.1 x - 0.15x the width of the bottom surface, and / or the distance between two spacers arranged on a common side wall corresponding to 0 , 45x - 0.55x the width of the bottom surface. These dimensions in combination are preferably used in square transport packages, so that both in the normal and in the stacked position there is an optimal support respectively. positioning. Such stackable transport packages are used daily in very large quantities and generally serve for disposable transport. Consequently, these are disposable products that must be simply constructed and inexpensive without affecting the environment permanently. Preferably, therefore, a durable feedstock is used. Accordingly, it is a particular advantage that the stackable transport packaging is made of a carton blank in one, and the lid part and the bottom part are connected to each other by means of a common side wall forming a back wall. A carton blank in one that can be folded very quickly in place for such a stackable transport packaging can be transported really well as a piece, because many of these flat items can be combined into a stack. The folding for transport packaging is very easy even for lay people and must be carried out with few grips. Usually, single layer corrugated board is preferably used which can be individually printed and dyed. Such carton packaging is sometimes also used as a plate replacement. Due to the fact that this transport packaging must not use any vent openings in the bottom part, an outflow of hot grease or hot oils is also prevented as far as possible, so that neither the transport nor the supplied customer has a soiling or also combustion risk. Thus, the lid portion and the bottom portion form at their interface a common sidewall which, depending on the mode of attack, may conveniently be attached to the lid portion or the bottom portion.

Further, the production relates to a flat-layered carton blank for a stackable conveyor package according to any one of claims 1 to 14. The carton blank has several vent openings disposed on the rim of the lid part, where at least one formed with the lid part and / or the bottom part is formed in the edge region of the vent part. a spacer, wherein the spacer can be raised in such a way that it extends beyond the lid surface, in the closed condition of the transport packaging, and that the support surface of the spacer or spacers is disposed within the bottom surface of the bottom part. In essence, this means that the spacers can be erected, along with the side walls of the lid part and / or the bottom part, about their fold line, whereby these are arranged on the lid wall respectively. the bottom wall. In this connection, it is a very simple solution, which can be easily transposed as part of a cartonboard item. In the following, an exemplary embodiment of the present invention is explained in more detail with the aid of drawings. Here is shown: fig. 1 is a top plan view of a carton blank according to the manufacture of a stackable transport packaging; FIG. 2 shows a front corner area of the transport packaging in a perspective view from above; FIG. 3 shows the rear corner area of two stacked transport packages in a rear perspective view; and FIG. 4 is a rotated stacking position of two stacked transport packages stacked in a rear perspective view.

The FIG. 1, in the later raised and collapsed condition, at the same time constitutes the stackable transport packaging, which therefore receives the reference sign 1A in the following figures. The carton blank 1 has a bottom portion 2 and a lid portion 3. The material used is a single layer corrugated cardboard with upper and lower cover layers. The lid portion 3 comprises a planar lid wall 4 having a substantially square shape. A vent opening 5 is provided in each corner area 4, which diagonally bridges the corner area concerned. Due to the position and shape of the vent openings 5, sections of the lid wall 4 remain in the corner areas in the form of corner reinforcements 6. The vent openings 5 have a minimum width Be approximately 10 times the material thickness of the carton blank 1. The overall opening cross-section of the vent openings 5 constitutes at least 5% of the lid surface tensioned by the lid wall 4.

The depiction of the flat carton blank 1 is to be understood such that drawn lines form cut edges where the material was separated and dotted lines form fold edges created by embossing or other techniques.

Adjacent to the four sides of the lid wall 4 are side walls arranged. In this context, the frontal wall 7 is the tab shaped wall mounted on the lid wall 4. Furthermore, laterally for the first side wall 9, it is arranged on the lid wall 4 by means of a fold line 10 and on the opposite side the side wall 11 at by means of a folding line 12. A side wall of the lid part 3 is also the back wall 13, which is arranged on the lid part 3 by means of a folding line 14A.

The special feature of the rear wall 13 is that the bottom part 2 and the lid part 3 share it as a common side wall, and the back wall 13 consequently forms a common connecting link of the bottom part 2 and the lid part 3. The fold lines 8, 10, 12 and 14A are each broken at two places. so that as a component of the sidewall in question, a bridged spacer 15 is formed. In later folding and erection of the transport packaging, spacers 15, together with the sidewalls 7, 9, 11 and 13, rotate around the corresponding fold lines 8, 10, 12 and 14A. Accordingly, the spacers 15 constitute the boundaries of the vent openings 5 relative to the adjacent side walls.

Each vent opening 5 further has a straight side edge 16 which is near the corner and a side edge 17 which is closer to the center of the lid portion. The side edge 17 is formed convexly curved towards the corner.

The bottom portion 2 has a square bottom wall 18 having a corresponding square bottom surface Bf having a width Bd and by means of the fold line 14B is connected to the back wall 13. The bottom portion 2 has two lateral side walls 19 and 21, each by means of a fold line 20 respectively. 22 is arranged on the bottom wall 18.1. Extension of the side walls 19 and 21 are rectangular shaped folding lugs 23 which, by means of fold lines 23.1, adjoin the side walls 19 and 21 associated with each case. a fold line 25 is provided with a double layer formed front wall 24. The two layers 24.1 and 24.2 of the front wall 24 are connected to each other by means of a double fold line 26. In the area of the fold line 25, on the first layer 24.1, lugs 27 are formed, which at later rotation about the fold line 25 releases insert slots in the bottom wall 18. On the outer edge of the second layer 24.2, corresponding lugs 28 are formed which, by folding about the double fold line 26, can later be inserted into the slots then released by the lasers 27. In this folding process, the folding lugs 23 are folded in such a way that they are arranged between the first and second layers 24.1 and 24.2, which is made possible by the double folding line 26. Because of this construction, the front wall 24 and the side walls 19 and 21 of the bottom wall 2 are fixed to each other by later folding the transport packaging.

The two side walls 19 and 21 have supply air slots 29 extending at a distance to the bottom wall 18 in parallel and spaced therefrom. A corresponding supply air slit 29 is also arranged in the rear wall 13. The release of grease and oil cannot occur in the collapsed state as a result of the supply air slots extending at a distance from the bottom wall 19 29. The base wall of the lid wall 4 is insignificantly smaller than the base wall of the bottom wall 18. whereby the lid part 3 can be inserted into the bottom part 2 at later folding, ie the front wall 7 and the side walls 9 and 11 of the lid part 3 are laterally overlaid by the corresponding associated side walls of the bottom part 2, namely the front wall 24 and the side walls 19 and 21. In order that the side walls 9 and 11 do not cover the vent slots 29 in the side walls 19 and 21, they essentially have a recess 30 in the middle. This recess 30 is defined in each case by a foot section 31. The foot section 31 is in each case located on the opposite side of a spacer 15. The foot sections 31, after later folding the transport packaging up on the inside of the bottom wall 18, stabilize the spacers 15.

The front wall 24 has on its upper edge a further finger opening 32 which, in the folded and closed state of the transport packaging, aligns with a finger lock 33 on the lid wall 4 and facilitates later opening of the lid part 3.

The spacers 15 have a distance Ae corresponding to 0.125 times the width of the Boaf bottom wall relative to each corner closest to each case. This distance Ae is the same for all spacers 15. Furthermore, the distance Aa between two spacers 15 arranged on the same sidewall, to 0.5 times the width of Boaf bottom wall 18. This distance Aa between the two spacers 15 is mutually equal at each sidewall. The convex side edge 17 of the vent opening 5 has a center curvature radius Re that is less than half the width of the boat bottom wall 18. This curvature radius Re is the same at all vent openings 5. In extension of the sidewalls 19 and 21, folding lugs are arranged in the region of the rear wall 13. 34 by means of a fold line 35. The folding lugs 34 adjoin the side walls 9 and 11 by means of a curved section 36 which facilitates the later recessing of the lid part 3 in the bottom part 2 about the fold line 14A. In addition, the folding lugs 34 reinforce the corners in the region of the rear wall 13 and cover them from the inside.

The location and shape of the vent openings 5 in the corner areas of the lid wall 4 as well as their diagonal extent in the corner areas including the concave curved side edge 17 causes hot foods such as e.g. a pizza to be transported from above does not protrude into the vent openings 5, but is completely covered by the lid wall 4. The largest possible diameter e.g. for a pizza is defined by the width Bd of the lid wall 18. An ideal circular pizza of this size can only be placed inside the transport packaging so that it is not visible from above through the vent openings 5 and consequently is completely covered by the lid part 3. In order to f. eg. If a pizza cannot slide too much back and forth in the transport packaging, this transport packaging is available in different sizes (eg of the width Bd of 20.26 and 30 cm). However, because of the curvature radius Re selected, there is a sufficient tolerance such that even a somewhat too small pizza is not immediately at risk of slipping into the area of the vent 5. The distance Ea between the two diagonally opposite vent 5 is therefore greater than width Boaf bottom surface Bf. The following is now explained in more detail with the aid of FIG. 2-4, how the design according to the invention of the carton 1 works when it is raised and folded into a transport package 1A.

By means of FIG. 2, it can be seen that due to the rotation of the front wall 7 about the fold line 8, the spacers 15 rise so that their support surfaces 15.1 point upwards and are arranged substantially parallel and spaced from the low surface area Ad. The lid part 3 is fully inserted into the bottom part 2. By means of FIG. 3 is shown the situation where two transport packages 1A are stacked complementary on top of each other. In this connection, the bottom underside Bu rests on the support surfaces 15.1, so that the low surface surface Ad 1 of the lower transport packaging 1A is located at a distance from the bottom underside Be of the transport packaging 1A placed above it. Thereby a slot 37 is formed between the transport packages 1A. Such stacking takes place preferentially inside a transport container, so that the transport packages 1A are once again secured against sliding to the side. The transport container is preferably equipped with a heating plate, e.g. an induction plate system so that hot air can flow into the transport packaging 1A via the supply air slots 29 and the heat loss is kept within an appropriate limit due to the evaporation through the vent openings 5.

Pack a hot food, e.g. a hot pizza, now in the transport packages 1A, then hot steam can evaporate out of the transport packaging 1A through the vent openings 5 and escape through the slot 37. A pizza, as a result of the evaporation, remains largely crisp and is not softened by water vapor. Further, the supply air slots 29 provide a thermal effect. The spacers 15 have in the embodiment shown in FIG. 2-4, the state raised a height Ha of approx. 1 cm, so that a corresponding slot 37 is formed. By raising the spacers 15, the vent 5 increases even more in relation to the one shown in FIG. 1.

By means of FIG. 4 it can be further seen that the location of the spacers 15, i.e. their distances Ae and Aa allow for further use. The transport packages 1A can also be stacked one on top of the other so that the bottom underside Bu of the upper transport packaging 1A rests immediately on the lid outer side Ad of the lower transport packaging 1A. This is possible when the transport packages 1A are positioned at 45 ° with respect to each other, so that the corner areas of the upper transport packaging 1A engage the holes between two spacers 15 on one and the same side wall. Such a stacking is particularly suitable when the transport packages 1A after being removed from a transport box are manually transported, since they are then further secured against slipping. At the same time it can be seen from FIG. 4, that the location of the spacers 15, as well as the design and position of the vent openings 5, are selected so that in this stacking manner they are not substantially covered, but can still fully perform their function so that hot steam can flow out.

The two stacking modes can be continued at almost arbitrary, reasonable height.

Consequently, by means of the carton blank 1 according to the invention and the corresponding transport packaging 1A, a single built-up packaging option for hot foods can be produced which can be produced cheaply and disposed of in a simple manner. The bottom wall 18 has no openings except for the slots released by the lasers 27. However, these slots are immediately closed again by means of the lugs 28, so that the bottom wall 18 can be substantially designated as dense. Consequently, no fat or oil comes out of the packaging. The evaporation takes place to a considerable extent via the vent openings 5 in the lid wall 4, which in both stack positions allow a free flow of the hot steam.

List of reference numbers 1A transport packaging 1 carton blank 2 bottom part 3 cover part 4 cover wall 5 vent opening 6 corner reinforcement 7 front wall 8 fold line 9 side wall 10 fold line 11 side wall 12 fold line 13 rear wall 14A fold line 14B fold line 15 spacer wall 15 side wall 17 side wall 17 side wall 17 side wall 17 sidewall 22 fold line 23 fold line 23.1 fold line 24 front wall 25 fold line 26 double fold line 27 load 28 load 29 supply air slot 30 recess 31 foot section 32 finger opening 33 finger loop 34 fold line 35 fold 36 cut 37 slot

Aa distance spacer

Ad low surface

Ae corner distance spacer

Bb width bottom surface

Ask for width vent opening

Bf bottom surface

Bu bottom bottom

One distance vent openings

Have height spacer

Re average radius of curvature

Claims (15)

1. Stackable transport packaging (1A) for hot foods, especially pizza, with a bottom part (2) having side walls (19, 21,24), a lid part (3) having side walls (7, 9, 11, 13) and with at least one vent opening (5) in the lid portion (3), the bottom portion (2) and the lid portion (3) engaging in the closed condition of the transport packaging (1A), which is new in that several vent openings (5) are provided. disposed at the edge of the cover portion (3) and at least one spacer (15) formed together with the cover portion (3) and / or the bottom portion (2) provided in the rim region of the vent openings (5) and in the closed state of the transport packaging (1A) protrudes beyond the cover surfaces (Ad), and that the spacer and the spacer respectively. the support surface (s) (15) of the spacers (15) is arranged within the bottom surface (Bf) of the bottom part (2). Stackable transport packaging (1A) according to claim 1, which is new in that a spacer (15) is formed as a straight bridged extension of a side wall (7, 9, 11, 13) of the lid part (3) and / or the bottom part ( 2), wherein the support surface (15.1) is formed by the narrow side of the spacer (15) arranged substantially parallel to the low surface surface (Ad). Stackable transport packaging (1A) according to claim 1 or 2, which is new in that the bottom part (2) and the lid part (3) have a complementary polygon shape from above and a spacer (15) is arranged on each side of the polygon. , and each side is adjacent to a vent opening (5). Stackable transport packaging (1A) according to one of claims 1 to 3, which is new in that the spacers (15) are formed on the lid part (3). Stackable transport packaging (1A) according to claim 4, which is new in that a spacer (15) adjoins directly to a vent opening (5) and together with a side wall (7, 9, 11, 13) in the lid part (3). forming a circumferential region of the vent opening (5). Stackable transport packaging (1A) according to one of claims 3 to 5, which is new in that the distance (Aa) between two spacers (15) on a side wall (7, 9,11,13) of the lid part (3) and / or the bottom portion (2) and the location of the vent openings (5) in the corner areas are such that a second transport package (1A) rotated by 180% about a substantially common high axis and having the same outer dimensions, with the corners fitting between the spacers (15), the bottom part bottom (Bu) of the upper conveyor packaging (1A) immediately rests on the cover surface (Ad) of the lower conveyor packaging (1A), the vent openings (5) are open overlap free at least up to 50%, preferably at least up to 90% of the upper transport packaging (1A), and n corresponds to the corner number of the polygon shape. Stackable transport packaging (1A) according to one of claims 3 to 6, which is new in that a vent opening (5) extends substantially diagonally with distance to the corner in the corner area from a side wall (7, 9, 11, 13). to the second sidewall (7, 9, 11, 13), and there is a corner reinforcement (6) which forms in the corner a portion of the lid wall (4) and connects the two sidewalls (7, 9, 11, 13). 8. Stackable transport packaging (1A) for packing viewed from above circular foods, such as pizza etc., according to one of claims 3 to 7, which is new in that a vent opening (5) has a long hole form extending from a side wall (7, 9, 11, 13) to an adjacent side wall (7, 9, 11,13), the side edge (17) of the vent opening (5) closest to the center of the lid portion having a contour adjacent to the nearest corner . Stackable transport packaging (1A) according to claim 8, which is new in that the convex side edge (17) has a distance (Ea / 2) to the middle of the lid part which is greater than half the width (Bd) of the bottom surface (Bf). . Stackable transport packaging (1A) according to claim 9, which is new in that the convex side wall (17) has a central radius of curvature (Re) less than half the width (Bd) of the bottom surface (Bf). Stackable transport packaging (1A) according to claim 10, which is new in that the average width of a vent opening (5) is at least greater than five times the material thickness of the lid part (3). Stackable transport packaging (1A) according to one of claims 1 to 11, which is new in that the lateral side walls (9, 11) of the cover part (3) have protruding foot sections (31) with a supporting surface which in the transport packaging (1A) closed condition sits on the inside of the bottom wall (18) of the bundle (2). Stackable transport packaging (1A) according to one of claims 1 to 12, which is new in that the spacers (15) have a distance (Ae) to the nearest corner in the range of 0.1 x - 0.15x width (Bd ) of the bottom surface (Bf), and / or the distance (Aa) between two spacers (15) arranged on a common side wall (7, 9, 11, 13) corresponds to 0.45x - 0.55x the width (Bd ) of the bottom surface (Bf). Stackable transport packaging (1A) according to one of claims 1 to 13, which is new in that it is made of a carton blank (1) in one and that the lid part (3) and the bottom part (2) are connected to each other by means of of a common side wall forming a back wall (13). Flatbed carton blank (1) for a stackable conveyor package (1A) according to any one of claims 1 to 14, with several vent openings (5) disposed on the rim of the lid portion (3) and at least one spacer (15), formed in the peripheral region of the vent openings (5) together with the lid part (3) and / or the bottom part (2), where the spacers (15) can be raised in such a way that in the closed state of the transport packaging (1A) they extend beyond the lid surface ( Ad) and the support surface (15.1) of the spacers (15) is disposed within the bottom surface (Bf) of the bottom part (2).