Tray with cardboard base for food display

Abstract

To provide a tray that includes a paperboard base that is easy to stack when empty and is easy to stack even when full as well.SOLUTION: A tray (21) includes: a paperboard base (1); and at least a first wall (3a) and a second wall (3b) formed of a first layer and a second layer, each of the first layer and second layer including at least one hole (6), the second layer of the first wall having a first planar protrusion (12), the first planar protrusion and the first wall forming an angle between 30° and 90°. the first planar protrusion being arranged to hold the first embossing of the lid, the second layer of the second wall having a second planar protrusion, the second planar protrusion and the second wall forming an angle between 30° and 90°, thereby holding the second embossing of the lid in place.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a tray comprising a cardboard base arranged to be joined to a lid.

[0002] For the purposes of the present invention, the term "tray" means a tray, container, receptacle, or plate intended to contain typical foodstuffs, and these terms are used interchangeably herein.

[0003] The present invention also relates to a tray and lid assembly, a tray blank, and a manufacturing method.

Background Art

[0004] There are packages for displaying salads and instant foods, usually having a transparent plastic lid. This has the advantage of displaying plates that can be purchased at the store to consumers. Usually, these plates or trays are made of black or transparent plastic and are joined to plastic lids such as PP or transparent PET.

[0005] However, in order to reduce the consumption of disposable plastic products, the food industry tends to reduce the amount of plastic and replace it with cardboard or cellulose-based materials (such as paper and fibers derived from sugarcane).

[0006] Therefore, for the purposes of the present invention, the term "cardboard" means a material formed from a cellulose or lignocellulose matrix, such as cardboard, but also includes Stora Enso CKB250g cardboard.

[0007] Existing plates and trays have many advantages and are mature products, so they are very well designed to satisfy both consumers who use them and suppliers and manufacturers who provide them. For example, these plastic containers can be easily stacked whether they are empty or full, and their lids are on top and strong enough not to crush food products. Also, usually, the lids are sandwiched on top and can sufficiently protect the contents of the container, and moreover, consumers can easily open them.

[0008] There have been several attempts to replace these plastic containers with paperboard containers, but the products currently under development remain immature. These are usually complex to manufacture and assemble, and cannot be stacked when full or empty. In other cases, due to the different strengths of paperboard and plastic, the lids do not fit tightly enough, or the lids fit too tightly and are difficult to open the container. This is because interlocking is important for lid fitting, but due to the low strength of the paperboard wall, it is complicated to open the container without spilling the contents of the tray from the container, or there is not enough gripping force on the paperboard container.

Summary of the Invention

Problems to be Solved by the Invention

[0009] The object of the present invention is to provide a tray having a paperboard base that is as easy to use as a plastic container, thereby eliminating the drawbacks of the prior art. More specifically, the present invention provides a tray including a paperboard base that is easy to stack when empty and also easy to stack when full, and also provides a lid that can be easily closed and maintained closed when restocked on the merchandise shelf, and is sufficiently robust while still being easily opened by consumers to remove the contents of the tray.

Means for Solving the Problems

[0010] To solve such problems, the present invention provides a tray. The tray includes a paperboard base arranged to be joined to a lid, The base includes a base wall provided with at least three walls mainly extending upward from the base wall. At least the first wall and the second wall of the three walls are formed of a first layer of cardboard and a second layer of cardboard. The first layer of cardboard faces the inside of the tray, and the second layer of cardboard faces the outside of the tray. The second layer of the first wall and the second layer of the second wall each include at least a first vertical through-hole and a second vertical through-hole. The first vertical through-hole of the first wall is defined by the cardboard of the second layer of the first wall. At least a top edge portion and a bottom edge portion are formed on the cardboard of the second layer of the first wall. The first vertical through-hole is located between the top edge portion and the bottom edge portion. The top edge portion is located at a position of a distance H1 measured along the height of the first wall from a horizontal plane passing through the straight portion of the upper edge of the first wall. And the second vertical through-hole of the second layer of the second wall is defined by the cardboard of the second wall. At least a top edge portion and a bottom edge portion are formed on the cardboard of the second wall. The second vertical through-hole is located between the top edge portion and the bottom edge portion. The top edge portion is located at a position of a distance H2 measured along the height of the second wall from a horizontal plane passing through the straight portion of the upper edge of the second wall. The second layer of the first wall has a first substantially planar protruding portion located above the first vertical through-hole. The first substantially planar protruding portion has a height h1 measured between the top edge portion and a fold line. The fold line mainly forms the upper edge of the first wall. The height h1 is measured along the height of the protruding portion. The height h1 is greater than the height H1. The first protruding portion and the first wall form an angle of 90° or less and greater than 30°. The angle is arranged to hold a first embossment present on the inner surface of the first downwardly extending side wall of the lid wall of the lid. The second layer of the second wall has a second substantially planar protrusion located above the second vertical through-hole. The second substantially planar protrusion has a height h2 measured between the top edge and the fold line. The fold line mainly forms the upper edge of the second wall. The height h2 is measured along the height of the protrusion, and the height h2 is greater than the height H2. The second protrusion and the second wall form an angle of 90° or less and greater than 30°. The angle is provided to hold a second embossment present on the inner surface of the second downwardly extending side wall of the lid wall of the lid.

[0011] As described above, the tray according to the present invention has first and second substantially planar protrusions. The protrusions are formed by the deviation of the fold line due to grooving, half-cutting or perforating when folding the side wall. Below the protrusions, first and second vertical through-holes are respectively formed in the respective second layers of the first and second walls. These two protrusions, together with the two holes in the two different walls, join and securely hold the embossments provided in the lid by each hole. The tray formed in this way is prevented from the trays entering each other during stacking by the protrusions and is easy to separate for provision, so it can be stacked even when empty. Further, since there are no obstacles inside or outside the tray, separation of the trays during stacking is prevented. The double side walls further strengthen the tray, enable stacking when full, and also enable easier opening because the side walls do not collapse due to the pressure from consumers who want to eat the contents. The presence of these two layers with holes formed in one layer below the protrusion strengthens the gripping of the lid, and the other layer isolates the food from the external environment, thus preventing potential contamination, so the food remains isolated from the external environment of the tray.

[0012] For the purpose of the present invention, the deviation of the fold line may include a series of straight segments or curves. Similarly, the holes may be in a shape including an ellipse, an oval, a rectangle, a hexagon, a semi-circle, or one or more circular edges and / or one or more straight edges.

[0013] For the purposes of the present invention, the term "base wall provided with at least three walls extending upward mainly from the base wall" means that "the at least three walls extend upward in a lateral direction with respect to the base wall, or are vertical or slightly flare outward, thereby facilitating stacking one of a plurality of empty trays within another tray".

[0014] Preferably, the at least three walls extend upward in a lateral direction so as to slightly flare with respect to the bottom wall. In such a case, the angle formed between the first protrusion and the first wall, or the angle formed between the second protrusion and the second wall, may be as high as 90° and does not interfere with the lid engaging in the desired position. The upper walls of the first and second substantially planar protrusions formed during folding of the side walls are thereby directed downward and enable guiding of the lid to the embossment until they reach the closed position. In this closed position, the lid has an embossment joined at the lower surface of the protrusion, and the protrusion holds the lid within the hole. By directing the upper walls of the first and second substantially planar protrusions downward, when the user applies pressure to the lid to join the lid and the tray, the embossment can slide along the wall.

[0015] Preferably, the base wall provided with at least three walls is a base wall provided with 3, 4, 6, 8, 10 or 12 walls.

[0016] The tray according to the present invention may be in a shape such as triangular, rectangular or square, hexagonal, octagonal, decagonal, dodecagonal, etc.

[0017] Preferably, according to the present invention, the tray is rectangular or square, and for this reason, the base wall is provided with four walls, and the first wall and the second wall face each other, and the third wall and the fourth wall also face each other.

[0018] In a preferred embodiment of the present invention, the second layer of the first wall has a third vertically penetrating hole, which is defined by the paperboard of the second layer of the first wall. At least a top edge portion and a bottom edge portion are formed on the paperboard of the second layer of the first wall, and the third vertically penetrating hole is located between the top edge portion and the bottom edge portion. The top edge portion is located at a position of a distance H3 measured along the height of the first wall from a horizontal plane passing through the straight portion of the upper edge of the first wall. The second layer of the first wall has a third substantially planar protruding portion located above the third vertically penetrating hole. The third substantially planar protruding portion has a height h3 measured between the top edge portion and a fold line mainly forming the upper edge of the first wall. This height is measured along the height of the third protruding portion. The height h3 is greater than the height H3, and the third protruding portion and the first wall form an angle of 90° or less and greater than 30°.

[0019] Therefore, the tray according to the present invention has two protruding portions and two holes located in one of the side walls, thereby enhancing the holding force against the lid and being particularly suitable for long trays.

[0020] In still another preferred embodiment of the present invention, the second layer of the second wall has a fourth vertically penetrating hole, which is defined by the paperboard of the second layer of the second wall. At least a top edge portion and a bottom edge portion are formed on the paperboard of the second layer of the second wall, and the fourth vertically penetrating hole is located between the top edge portion and the bottom edge portion. The top edge portion is located at a position of a distance H4 measured along the height of the first wall from a horizontal plane passing through the straight portion of the upper edge of the first wall. The second layer of the second wall has a fourth substantially planar protruding portion located above the fourth vertically penetrating hole. The fourth substantially planar protruding portion has a height h4, which is measured between the top edge portion and a fold line mainly forming the upper edge of the second wall. This height h4 is measured along the height of the fourth protruding portion. The height h4 is greater than the height H4, and the fourth protruding portion and the second wall form an angle of 90° or less and greater than 30°.

[0021] Therefore, the tray according to the present invention has two protrusions and two holes located on two side walls, preferably located on the opposing side walls, thereby enhancing the retention against the lid and being particularly suitable for long trays.

[0022] Preferably, according to the present invention, the first wall and the second wall each have a first length and a second length, and the first longitudinal through-hole in the first wall has a first length, and the second longitudinal through-hole in the second wall has a second length. The ratio of the first length of the first wall to the first length of the first longitudinal through-hole present in the first wall is 5 to 30, preferably 7 to 25, preferably 8 to 15, preferably 9 to 12, particularly 9.8 to 10.8, and the ratio of the second length of the second wall to the second length of the second longitudinal through-hole present in the second wall is 5 to 30, preferably 7 to 25, preferably 8 to 15, preferably 9 to 12, particularly 9.8 to 10.8.

[0023] In a specific embodiment of the present invention, the first wall and the second wall each have a first length and a second length, and the third longitudinal through-hole in the first wall has a third length, and the fourth longitudinal through-hole in the second wall has a fourth length. The ratio of the first length of the first wall to the third length of the third longitudinal through-hole present in the first wall is 5 to 30, preferably 7 to 25, preferably 8 to 15, preferably 9 to 12, particularly 9.8 to 10.8, and the ratio of the second length of the second wall to the fourth length of the fourth longitudinal through-hole present in the second wall is 5 to 30, preferably 7 to 25, preferably 8 to 15, preferably 9 to 12, particularly 9.8 to 10.8.

[0024] In a preferred embodiment according to the present invention, the upper edge of the first wall has at least a first inner deflection portion that forms the top edge of the first protrusion.

[0025] In another preferred embodiment according to the present invention, the upper edge of the second wall has at least a second inner deflection portion that forms the top edge of the second protrusion.

[0026] In another preferred embodiment according to the present invention, the upper edge portion of the first wall has at least a third inner deflection portion that forms the top edge portion of the third protrusion.

[0027] In another preferred embodiment according to the present invention, the upper edge portion of the second wall has at least a fourth inner deflection portion that forms the top edge portion of the fourth protrusion.

[0028] For the purpose of the present invention, the term "inner deflection" means that "the fold line deflects towards the inside of the tray".

[0029] Other embodiments of the tray according to the present invention are described in the appended claims.

[0030] The present invention also relates to an assembly formed by a tray according to the present invention, the assembly further comprising a lid formed by a lid wall, at least three side walls extending downward from the lid wall, the lid including the first side wall and the second side wall, both the first side wall and the second side wall having an inner surface, and a first embossment and a second embossment protruding towards the inside of the lid being respectively provided on the inner surface, the first embossment and the second embossment being respectively configured to fit below the first protrusion of the first wall of the tray and below the second protrusion of the second wall of the tray.

[0031] More specifically, the lid is formed by a lid wall, four side walls extend downward from the lid wall, and they face each other in pairs. Preferably, the first and second embossments are present on the first side wall and the second side wall facing the first side wall.

[0032] In a specific embodiment of the assembly according to the present invention, the protrusion forms a guide wall for the lid, thereby making it easier for the embossment to slide along the substantially planar upper wall of the protrusion, locking the embossment below the corresponding protrusion, and holding the embossment in a hole below the protrusion.

[0033] In a particular embodiment of the assembly according to the present invention, the first and second side walls have shoulders, whereby the lid wall has a cross-section smaller than that of the base of the tray. Thus, the lid has a cross-section that expands towards the bottom, and an edge is formed on the shoulder, and this edge is arranged to be placed on the edge of the side wall of the tray, and thus is arranged in a region where the tray is less likely to collapse. Further, the protrusions of the first and second side walls of the lid are formed within the lid portion beyond the edge formed by the shoulder from the lid wall, and the lid portion incorporates the side walls of the tray, thereby facilitating the fitting of the protrusions existing outside the first and second walls of the tray, and is arranged in the first and second longitudinal through-holes therein.

[0034] More specifically, according to the present invention, the first emboss has a depth P1 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm, and the second emboss has a depth P2 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm.

[0035] When the tray includes the first and third protrusions of the first wall, the second and fourth protrusions of the second wall, and the first and third longitudinal through-holes of the first wall and the second and fourth longitudinal through-holes of the second wall, the lid includes the first and third embosses of the first wall and the second and fourth embosses of the second wall.

[0036] Preferably, in such a case, the third emboss has a depth P3 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm, and the fourth emboss has a depth P4 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm.

[0037] Other embodiments of the assembly according to the present invention are described in the appended claims.

[0038] The present invention also relates to a blank for a cardboard tray, the blank for the cardboard tray having at least three sides, the at least three sides including a base portion including at least a first side and a second side, a first portion of a first wall adjacent to the base portion along the first side face; a second portion of the first wall adjacent to the first portion of the first wall; including at least a straight portion arranged to form an upper edge portion of the first wall of the tray, the second portion of the first wall having a first longitudinal recess of length L1, the first longitudinal recess being a first fold line arranged to form a first longitudinal through hole of the first wall, the first fold line further having a first deflection portion at the first portion of the first wall, the length of the first deflection portion being greater than the length L1, the first fold line; a first portion of a second wall adjacent to the base portion along the second side face; a second portion of the second wall adjacent to the first portion of the second wall; including at least a straight portion arranged to form an upper edge portion of the second wall of the tray, the second portion of the second wall having a second longitudinal recess of length L2, the second longitudinal recess being a second fold line arranged to form a second longitudinal through hole of the second wall, the second fold line further having a second deflection portion at the first portion of the second wall, the length of the second deflection portion being greater than the length L2, and the side face of the base portion being a fold line formed by grooving and / or cutting and / or half-cutting the cardboard, the second fold line.

[0039] In a preferred embodiment according to the present invention, the blank of the cardboard tray a first portion of a third wall adjacent to the base portion along the third side face; a second portion of the third wall adjacent to the first portion of the third wall; a third fold line located between the first portion and the second portion of the third wall and arranged to form an upper edge portion of the third wall of the tray, the second portion of the third wall having an edge facing the third fold line, and a first lateral edge and a second lateral edge facing each other, the third fold line. The blank further includes a first tab portion extending from the first lateral edge portion and a second tab portion extending from the second lateral edge portion of the second part of the third wall. The first tab portion has a connecting edge portion and a free edge portion. The connecting edge portion is connected to the first lateral edge portion of the second part of the third wall, and a fold line formed by grooving and / or notching and / or half-cutting is formed. The first tab portion further has a third edge portion and a fourth edge portion. The third edge portion and the fourth edge portion are spaced apart by a distance D1 along the connecting edge portion and are spaced apart by a distance D2 along the free edge portion. The distance D1 is greater than the distance D2. The first tab portion is arranged to be guided between the first part and the second part of the first wall. The second tab portion has a connecting edge portion and a free edge portion. The connecting edge portion is connected to the second lateral edge portion of the second part of the third wall, and a fold line formed by grooving and / or notching and / or half-cutting is formed. The second tab portion further has a third edge portion and a fourth edge portion. The third edge portion and the fourth edge portion are spaced apart by a distance D3 along the connecting edge portion and are spaced apart by a distance D4 along the free edge portion. The distance D3 is greater than the distance D4. The second tab portion is arranged to be guided between the first part and the second part of the second wall.

[0040] More specifically, the blank of the cardboard tray according to the present invention includes a base portion, the base portion includes four side surfaces, the first side surface and the second side surface face each other, and further includes a fourth side surface corresponding to the third side surface. The blank a first part of a fourth wall adjacent to the base portion along the fourth side surface, a second part of the fourth wall adjacent to the first part of the fourth wall, a fourth fold line located between the first part and the second part of the fourth wall and arranged to form the upper edge portion of the fourth wall of the tray. The second part of the fourth wall has an edge portion facing the fourth fold line, a first lateral edge portion and a second lateral edge portion facing each other. The blank further includes the fourth fold line. a third tab portion extending from the first lateral edge portion, a fourth tab portion extending from the second lateral edge of the second portion of the fourth wall; The third tab portion has a connecting edge and a free edge, the connecting edge being connected to the first lateral edge of the second portion of the fourth wall, and a fold line formed by grooving and / or notching and / or half-cutting being formed. The third tab portion further has a third edge and a fourth edge, the third edge and the fourth edge being spaced apart by a distance D5 along the connecting edge and being spaced apart by a distance D6 along the free edge, the distance D5 being greater than the distance D6. The third tab portion is arranged to be guided between the first portion and the second portion of the first wall. The fourth tab portion has a connecting edge and a free edge, the connecting edge being connected to the second lateral edge of the second portion of the fourth wall, and a fold line formed by grooving and / or notching and / or half-cutting being formed. The fourth tab portion further has a third edge and a fourth edge, the third edge and the fourth edge being spaced apart by a distance D7 along the connecting edge and being spaced apart by a distance D8 along the free edge, the distance D7 being greater than the distance D8. The fourth tab portion is arranged to be guided between the first portion and the second portion of the second wall.

[0041] In a preferred variant, the base portion of the blank according to the invention comprises four side faces, the first and second side faces facing each other and further comprising a fourth side face facing the third side face. The blank a first portion of a third wall adjacent to the base portion along the third side face; a second portion of the third wall adjacent to the first portion of the third wall; a third fold line located between the first portion and the second portion of the third wall and arranged to form the upper edge of the third wall of the tray, the second portion of the third wall including an edge facing the third fold line and first and second lateral edges facing each other; a third fold line; a first portion of a fourth wall adjacent to the base portion along the fourth side face; a second portion of the fourth wall adjacent to the first portion of the fourth wall; A fourth fold line located between a first part and a second part of the fourth wall and arranged to form an upper edge of the fourth wall of the tray, wherein the second part of the fourth wall includes an edge facing the fourth fold line and first and second lateral edges facing each other, and further includes the fourth fold line, and the blank is For example, a first bellows part, and a first part of a fixing means located between a first part of the first wall and a first part of the fourth wall For example, a second bellows part, and a second part of a fixing means located between a first part of the first wall and a first part of the third wall For example, a third bellows part, and a third part of a fixing means located between a first part of the second wall and a first part of the fourth wall For example, a fourth bellows part, and further includes a fourth part of a fixing means located between a first part of the second wall and a first part of the third wall.

[0042] In a preferred modification of the present invention, the first deflection part has a first part extending from the first fold line towards the base part, a second part substantially parallel to the first fold line, and a third part extending from the second part and joined to the first fold line.

[0043] In another preferred modification of the present invention, the second deflection part has a first part extending from the second fold line towards the base part, a second part substantially parallel to the second fold line, and a third part extending from the second part and joined to the second fold line.

[0044] In still another preferred modification of the present invention, the third deflection part has a first part extending from the first fold line towards the base part, a second part substantially parallel to the first fold line, and a third part extending from the second part and joined to the first fold line.

[0045] In yet another preferred modification of the present invention, the fourth deflection portion includes a first portion extending from the second fold line toward the base portion, a second portion substantially parallel to the second fold line, and a third portion extending from the second portion and joined to the second fold line.

[0046] More specifically, in the blank according to the present invention, the first fold line has a guideline passing through the straight portion of the first fold line, the first recess has a point closest to the guideline, and when measured along the lateral direction of the second portion of the first wall, the distance between the closest point and the guideline is H1, and the distance between the same point closest to the guideline of the first recess and the farthest point of the deflection portion is h1, then h1 is greater than H1.

[0047] Preferably, in the blank according to the present invention, the second fold line has a guideline passing through the straight portion of the second fold line, the second recess has a point closest to the guideline, and when measured along the lateral direction of the second portion of the second wall, the distance between the closest point and the guideline is H2, and the distance between the same point closest to the guideline of the second recess and the farthest point of the deflection portion is h2, then h2 is greater than H2.

[0048] Preferably, the second portion of the first wall has a third longitudinal recess having a length L3, the third longitudinal recess is arranged to form a third longitudinal through-hole in the first wall, the first fold line further has a third deflection portion in the first portion of the first wall, and the length of the third deflection portion is greater than the length L3.

[0049] Similarly, preferably, the second portion of the second wall has a fourth longitudinal recess having a length L4, the fourth longitudinal recess is arranged to form a fourth longitudinal through-hole in the second wall, the second fold line further has a fourth deflection portion in the first portion of the second wall, and the length of the fourth deflection portion is greater than the length L4.

[0050] Other embodiments of the blank of the tray according to the present invention are described in the appended claims. The present invention also relates to a method for manufacturing a cardboard tray according to the present invention. The manufacturing method includes a step of cutting the blank according to the present invention, a step of forming a fold line in the base portion by making a groove and / or a cut and / or a half-cut along at least three sides, preferably at least four sides, a step of forming the first, second, and third fold lines, preferably the first, second, third, and fourth fold lines, by making a groove and / or a cut and / or a half-cut, a step of applying adhesiveness to the opposite sides of the first parts and / or the second parts of each of the first wall, the second wall, and the third wall, preferably applying adhesiveness to the opposite sides of the first parts and / or the second parts of each of the first wall, the second wall, the third wall, and the fourth wall, a step of folding the first part onto the second part of each of the first, second, and third walls, preferably folding the first part onto the second part of each of the first, second, third, and fourth walls, a step of inserting into a tray forming machine and straightening each of the first, second, and third walls, preferably each of the first, second, third, and fourth walls, upward, hemming the first tab portion of the third wall, preferably the first tab portion of the third wall and the first tab portion of the fourth wall, to bring the first tab portion into contact with the first or second part of the first wall, and hemming the second tab portion of the third wall, preferably the second tab portion of the third wall and the second tab portion of the fourth wall, to bring the second tab portion into contact with the first or second part of the second wall, or if the fourth wall exists, folding and optionally adhering the first, second, third, and fourth fixing means to assemble the third wall to the first and second walls, preferably assembling the third wall to the first and second walls and assembling the fourth wall to the first and second walls.

[0051] Preferably, for the purposes of the present invention, bringing the first tab portion of the third wall (preferably also the first tab portion of the fourth wall) into contact with the first or second portion of the first wall means inserting the first tab portion of the third wall (preferably also the first tab portion of the fourth wall) between the first and second portions of the first wall.

[0052] Preferably, for the purposes of the present invention, bringing the second tab portion of the third wall (preferably also the second tab portion of the fourth wall) into contact with the first or second portion of the first wall means inserting the second tab portion of the third wall (preferably also the second tab portion of the fourth wall) between the first and second portions of the first wall. Thus, the first and second tab portions of the third wall (preferably also the first and second tab portions of the fourth wall) are integrally formed with the first wall, which is because the first and second tab portions are guided into the space between the first and second portions of the first wall by interlocking, or by an adhesive used during adhesion (applied to the opposite side of each of the first and second first portions and / or second portions during adhesion), or by an additional adhesive used in an additional adhesion step.

[0053] Alternatively, if the fourth wall is present, the walls of the tray are fixed by folding and optionally adhering the first, second, third, and fourth fixing means.

[0054] Thus, fold the first part of the fixing means (e.g., the first bellows part) and optionally adhere it to the inner or outer surface of the first wall or the fourth wall, fold the second part of the fixing means (e.g., the second bellows part) and optionally adhere it to the inner or outer surface of the first wall or the third wall, fold the third part of the fixing means (e.g., the third bellows part) and optionally adhere it to the inner or outer surface of the second wall or the fourth wall, and fold the fourth part of the fixing means (e.g., the fourth bellows part) and optionally adhere it to the inner or outer surface of the second wall or the third wall.

[0055] As another example of the portion of the fixing means, there is a protruding piece portion, which does not extend from the second portions of the first wall, the second wall, the third wall, and any optional fourth wall, but extends from the first portions of the first wall, the second wall, the third wall, and any optional fourth wall. For example, the first portions and the second portions of the first wall, the second wall, the third wall, and any optional fourth wall have different heights and only partially overlap.

[0056] Other embodiments of the method according to the present invention are described in the appended claims. Other features, details, and advantages of the present invention will become apparent from the following non-limiting description with reference to the accompanying drawings and examples. In the drawings, the same or similar components are denoted by the same reference numerals.

Brief Description of the Drawings

[0057]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Modes for Carrying Out the Invention

[0058] As shown in FIG. 1, the tray according to the present invention includes a cardboard base 1 provided to be joined to a lid (not shown). The base 1 includes a base wall 2, and four walls 3a, 3b, 3c, 3d are provided on the base wall 2, mainly extending upward from the base wall 2.

[0059] In the embodiment shown in FIG. 1, all the walls 3a, 3b, 3c, 3d are formed of the cardboard of the first layer 4 and the cardboard of the second layer 5. However, it is necessary that at least the first wall and the second wall are formed of the cardboard of the first layer and the cardboard of the second layer.

[0060] The cardboard of the first layer 4 faces the inside of the tray, and the cardboard of the second layer 5 faces the outside of the tray. The second layer 5 of the first wall 3a and the second wall 3b each includes at least a first vertical through-hole 6 and a second vertical through-hole (not visible). The first vertical through-hole 6 of the first wall 3a is defined by the cardboard of the second layer 5 of the first wall 3a, whereby at least one top edge portion 7 and one bottom edge portion 8 are formed, and the first vertical through-hole 6 is located between the top edge portion 7 and the bottom edge portion 8. The top edge portion 7 is positioned at a location of a distance H1, which is measured along the height 10 of the first wall 3a from a horizontal plane P passing through the straight portion of the upper edge portion 9 of the first wall 3a.

[0061] The second vertical through-hole of the second layer 5 of the second wall 3b is defined by the cardboard of the second wall 3b, and the cardboard forms at least one top edge portion and one bottom edge portion. The second vertical through-hole is located between the top edge portion and the bottom edge portion. The top edge portion (not shown) is positioned at a location of a distance H2, which is measured along the height 11 of the second wall 3b from a horizontal plane passing through the straight portion of the upper edge portion of the second wall 3b. The second layer 5 of the first wall 3a has a first substantially planar protrusion 12 positioned above the first vertical through-hole 6. The protrusion has a height h1, which is measured between the top edge portion 7 and a fold line 13, and the fold line mainly forms the upper edge portion 9 of the first wall 3a measured along the height of the protrusion 12.

[0062] The height h1 is greater than the height H1. The first protrusion 12 that forms an angle a (see FIG. 8) with the first wall 3a of 90° or less and greater than 30° is arranged to hold the first emboss 15 (see FIGS. 2, 3, 4, and 5), and the first emboss 15 is present on the inner surface of the first downwardly extending side wall 16a of the lid wall 17 of the lid 18.

[0063] The second layer 5 of the second wall 3b has a substantially planar second protrusion (not visible), and the second protrusion is positioned above the second vertically through hole (not visible), and has a height h2 measured between the top edge portion and the fold line mainly forming the upper edge portion of the second wall. The height is measured along the height of the protrusion. The height h2 is greater than the height H2, and the second protrusion and the second wall form an angle of 90° or less and greater than 30°. The angle is arranged to hold the second emboss 15, and the second emboss is present on the inner surface of the second downwardly extending side wall 16b of the lid wall 17 of the lid 18.

[0064] Preferably, according to the present invention, the first wall 3a and the second wall 3b each have a first length L and a second length L, and the first vertically through hole 6 of the first wall 3a has a first length l, and the second vertically through hole of the second wall 3b has a second length l. The ratio of the first length L of the first wall 3a to the first length l of the first vertically through hole 6 present in the first wall 3a is 9 to 11, preferably 9.5 to 10.5, particularly preferably 9.8 to 10.2, and the ratio of the second length L of the second wall 3b to the second length l of the second vertically through hole present in the second wall 3b is 9 to 11, preferably 9.5 to 10.5, particularly preferably 9.8 to 10.2.

[0065] According to the present invention, the upper edge portion 9 of the first wall 3a has at least a first inner deflection portion 19 that forms the top edge portion of the first protrusion 12.

[0066] As shown in FIGS. 2, 3, 4, and 5, the lid 18 is formed by a covering wall 17, and the four side walls 16a, 16b, 16c, and 16d extend downward from the covering wall 17 and face each other. Each of the first side wall 16a and the second side wall 16b has an inner surface, and first and second embossments 15 protruding toward the inside of the lid 18 are respectively provided on the inner surface. The first and second embossments 15 are respectively arranged to fit below the first protrusion 12 of the first wall 3a of the tray and below the second protrusion of the second wall of the tray.

[0067] At least the first side wall 16a and the second side wall 16b have shoulders 14 of width x, whereby the lid wall 17 has a cross-section smaller than that of the base wall 2 of the tray. Thus, the lid 18 has a cross-section that widens toward the bottom, and an edge is formed on the shoulder 14, and the edge is arranged to be placed on the edge 9 of the side wall of the tray, and thus is arranged in a region where the tray is less likely to collapse. Also, the embossments 15 on the first side wall and the second side wall of the lid 16a, 16b are formed in the lid portion surrounding the side wall of the tray beyond the edge formed by the shoulder 14 from the lid wall 17.

[0068] More specifically, according to the present invention, the first embossment has a depth P1 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm, and the second embossment has a depth P2 of 0.8 mm to 5 mm, preferably 1 mm to 3 mm, preferably 2 mm.

[0069] FIG. 6 shows a blank 20 of a cardboard tray 21. The blank 20 of the cardboard tray 21 includes a base portion 22 provided with at least a first side surface 24 and a second side surface 23, a first portion 25 of a first wall 3a adjacent to the base portion 22 along the first edge 24, a second portion 26 of the first wall 3a adjacent to the first portion 25 of the first wall 3a, and at least one straight portion 28. The straight portion 28 has a first fold line 27 arranged to form the upper edge 9 of the first wall 3a of the tray 21.

[0070] The second part 26 of the first wall 3a has a first longitudinal recess 29 with a length L1, and is arranged to form a first longitudinal through-hole 6 in the first wall 3a. The first fold line 27 is a first deflection part 30 in the first part 25 of the first wall 3a, and the length T1 of the first deflection part 30 is larger than the length L1. The first deflection part 30, the first part 31 of the second wall 3b adjacent to the base part 22 along the second side surface 23, and the second part 32 of the second wall 3b adjacent to the first part 31 of the second wall 3b. The second fold line 33 includes at least one straight part 34 and is arranged to form the upper edge part 35 of the second wall 3b of the tray 21.

[0071] The second part 32 of the second wall 3b has a second longitudinal recess 36 with a length L2, and is arranged to form a second longitudinal through-hole in the second wall 3b. The second fold line 33 further has a second deflection part 37 in the first part 31 of the second wall 3b, and the length T2 of the second deflection part 37 is larger than the length L2. The side surfaces 23 and 24 of the base part 22 are fold lines formed by grooving and / or cutting and / or half-cutting the cardboard.

[0072] The blank 20 of the cardboard tray 21 further includes a first part 38 of a third wall 3c adjacent to the base part 22 along the third side surface 40, a second part 39 of the third wall 3c adjacent to the first part 38 of the third wall 3c, and a third fold line 41 located between the first part 38 and the second part 39 of the third wall 3c and arranged to form the upper edge part of the third wall 3c of the tray 21.

[0073] The second part 39 of the third wall 3c has an edge part 42 facing the third fold line 41, a first lateral edge part 43 and a second lateral edge part 44 facing each other. The blank further includes a first tab part 45 extending from the first lateral edge part 43 and a second tab part 46 extending from the second lateral edge part 44 of the second part 39 of the third wall 3c.

[0074] The first tab portion 45 has a connecting edge portion 47 and a free edge portion 48. The connecting edge portion 47 is connected to the first lateral edge portion 43 of the second portion 39 of the third wall 3c, and a folding line formed by grooving and / or notching and / or half-cutting is formed therein.

[0075] The first tab portion 45 further has a third edge portion 49 and a fourth edge portion 50. The third edge portion 49 and the fourth edge portion 50 are spaced apart by a distance D1 along the connecting edge portion and are spaced apart by a distance D2 along the free edge portion. The distance D1 is greater than the distance D2, and the first tab portion 45 is arranged to be guided between the first portion 25 and the second portion 26 of the first wall 3a.

[0076] The second tab portion 46 has a connecting edge portion 51 and a free edge portion 52. The connecting edge portion 51 is connected to the second lateral edge portion 44 of the second portion 39 of the third wall 3c, and a folding line formed by grooving and / or notching and / or half-cutting is formed therein.

[0077] The second tab portion 46 further has a third edge portion 53 and a fourth edge portion 54. The third edge portion 53 and the fourth edge portion 54 are spaced apart by a distance D3 along the connecting edge portion 51 and are spaced apart by a distance D4 along the free edge portion 52. The distance D3 is greater than the distance D4, and the second tab portion 46 is arranged to be guided between the first portion 31 and the second portion 32 of the second wall 3b.

[0078] The blank 21 of the cardboard tray according to the present invention further includes a first portion 55 of the fourth wall 3d adjacent to the base portion 22 along the fourth side surface 61, a second portion 56 of the fourth wall 3d adjacent to the first portion 55 of the fourth wall 3d, and a fourth folding line 57 located between the first portion 55 and the second portion 56 of the fourth wall 3d and arranged to form the upper edge portion of the fourth wall 3d of the tray 21.

[0079] The second part 56 of the fourth wall 3d has an edge 58 facing the fourth fold line 57, and a first lateral edge 73 and a second lateral edge 62 facing each other. The blank further includes a third tab portion 60 extending from the first lateral edge 73 of the fourth wall 3d, and a fourth tab portion 59 extending from the second lateral edge 62 of the second part 56 of the fourth wall 3d.

[0080] The third tab portion 60 has a connecting edge 63 and a free edge 64. The connecting edge 63 is connected to the first lateral edge 73 of the second part 56 of the fourth wall 3d, and a fold line formed by grooving and / or cutting and / or half-cutting is formed.

[0081] The third tab portion 60 further has a third edge 65 and a fourth edge 66. The third edge 65 and the fourth edge 66 are separated from each other by a distance D5 along the connecting edge, and are separated from each other by a distance D6 along the free edge. The distance D5 is greater than the distance D6. The third tab portion 60 is arranged to be guided between the first part 25 and the second part 26 of the first wall 3a.

[0082] The fourth tab portion 59 has a connecting edge 67 and a free edge 68. The connecting edge 67 is connected to the second lateral edge 62 of the second part 56 of the fourth wall 3d, and a fold line formed by grooving and / or cutting and / or half-cutting is formed.

[0083] The fourth tab portion 59 further has a third edge 69 and a fourth edge 70. The third edge 69 and the fourth edge 70 are separated from each other by a distance D7 along the connecting edge 67, and are separated from each other by a distance D8 along the free edge 68. The distance D7 is greater than the distance D8.

[0084] The fourth tab portion 59 is arranged to be guided between the first part 31 and the second part 32 of the second wall 3b.

[0085] The first deflecting portion 30 has a first portion A extending from the first fold line 27 of the base portion 22, a second portion B substantially parallel to the first fold line 27, and a third portion C extending from the second portion B and connected to the first fold line 27.

[0086] The second deflecting portion 37 has a first portion A extending from the second fold line 33 toward the base portion 22, a second portion B substantially parallel to the second fold line 33, and a third portion C extending from the second portion B and connected to the second fold line 33.

[0087] The third deflecting portion 72 has a first portion A extending from the first fold line 27 toward the base portion 22, a second portion B substantially parallel to the first fold line 27, and a third portion C extending from the second portion B and connected to the first fold line 27.

[0088] The fourth deflecting portion 71 has a first portion A extending from the second fold line 33 toward the base portion 22, a second portion B substantially parallel to the second fold line 33, and a third portion C extending from the second portion B and connected to the second fold line 33.

[0089] As shown in FIG. 7, in the blank shown, the first fold line 28 has a guide line E passing through the straight portion 28 of the first fold line 27, the first recess 29 has a point closest to the guide line E, and when measured in the lateral direction of the second portion 26 of the first wall 3a, if the distance between the closest point and the guide line E is H1 and the distance between the same point closest to the guide line of the first recess 29 and the farthest point of the deflecting portion is h1, then h1 is greater than H1.

[0090] It should be understood that the present invention is not limited to the above embodiments and can be modified without departing from the scope of the appended claims.

[0091] For example, for the purposes of the present invention, in a particular embodiment, it is envisioned that all walls extending from the base wall include at least one longitudinally extending through hole.

[0092] In a specific embodiment, the cardboard of the first layer and the cardboard of the second layer of the wall have substantially the same length.

[0093] In a specific embodiment, the cardboard of the first layer and the cardboard of the second layer of the wall have different lengths. For example, the length of the first layer is, for example, 1.2 times, 1.5 times, 2 times, or 3 times greater than the length of the second layer.

[0094] The fold line may be formed by steps of grooving and / or cutting and / or half-cutting.

[0095] In a specific example, one or more walls without vertical through holes have a single layer of cardboard. In this example, the tab portion may be located on a wall including one or more vertical through holes or a wall portion without vertical through holes.

[0096] In a specific embodiment, the wall is fixed by a bellows. The non-recessed portion of the blank present at the intersection of the walls is folded and adhered to one of the adjacent walls.

Claims

1. A tray (21), comprising: a paperboard base (1) provided to be joined to a lid (18); the base includes a base wall (2) provided with at least three walls; the at least three walls mainly extend upward from the base wall (2), and at least a first wall (3a) and a second wall (3b) of the three walls are made of paperboard of a first layer (4) and paperboard of a second layer (5); the paperboard of the first layer (4) faces the inside of the tray, and the paperboard of the second layer (5) faces the outside of the tray; the second layer (5) of the first wall (3a) and the second wall (3b) each includes at least a first vertical through-hole (6) and a second vertical through-hole, and the first vertical through-hole (6) of the first wall (3a) is defined by the paperboard of the second layer (5) of the first wall (3a); at least a top edge portion (7) and a bottom edge portion (8) are formed on the paperboard of the second layer of the first wall, and the first vertical through-hole (6) is located between the top edge portion and the bottom edge portion; the top edge portion (7) is positioned at a location of a distance H1, and the distance H1 is measured along the height (10) of the first wall (3a) from a horizontal plane passing through a straight portion of the upper edge portion (9) of the first wall (3a); the second vertical through-hole of the second layer (5) of the second wall (3b) is defined by the paperboard of the second wall (3b); at least a top edge portion and a bottom edge portion are formed on the paperboard of the second layer of the second wall, and the second vertical through-hole is located between the top edge portion and the bottom edge portion; the top edge portion is positioned at a location of a distance H2, and the distance H2 is measured along the height of the second wall from a horizontal plane passing through a straight portion of the upper edge portion (35) of the second wall (3b); the second layer (5) of the first wall (3a) has a substantially planar first protrusion (12) positioned above the first vertical through-hole (6), the substantially planar first protrusion has a height h1, and the height h1 is measured between the top edge portion (7) and a fold line (13); the fold line mainly forms the upper edge portion (9) of the first wall (3a), the height h1 is measured along the height of the first protrusion (12), and the height h1 is greater than the distance H1; The first protrusion and the first wall (3a) form an angle of 90° or less and greater than 30°. The substantially planar first protrusion is provided to hold a first emboss (15) present on the inner surface of the first downwardly extending side wall (16a) of the lid wall (17) of the lid (18). The second layer (5) of the second wall (3b) has a substantially planar second protrusion positioned above the second longitudinally through hole. The substantially planar second protrusion has a height h2, which is measured between the top edge portion and the fold line. The fold line mainly forms the upper edge portion (35) of the second wall (3b), and the height h2 is measured along the height of the second protrusion. The height h2 is greater than the distance H2. The second protrusion and the second wall form an angle of 90° or less and greater than 30°. The substantially planar second protrusion is provided to hold a second emboss (15) present on the inner surface of the second downwardly extending side wall (16b) of the lid wall (17) of the lid (18), the tray (21). [

2. ] The base wall (2) provided with at least three walls is a base wall (2) provided with 3, 4, 6, 8, 10 or 12 walls, the tray (21) according to claim 1. [

3. ] The base wall (2) is provided with four walls, and the first wall (3a) and the second wall (3b) among them face each other, the tray (21) according to claim 1. [

4. ] The second layer (5) of the first wall (3a) has a third longitudinally through hole defined by the paperboard of the second layer (5) of the first wall (3a). At least a top edge portion and a bottom edge portion are formed on the paperboard of the second layer of the first wall. The third longitudinally through hole is located between the top edge portion and the bottom edge portion. The top edge portion is positioned at a location of a distance H3, and the distance H3 is measured along the height (10) of the first wall (3a) from a horizontal plane passing through the straight portion of the upper edge portion (9) of the first wall (3a). The second layer (5) of the first wall (3a) has a substantially planar third protrusion positioned above the third longitudinally through hole. The substantially planar third protrusion has a height h3, which is measured between the top edge portion and the fold line (13). The fold line mainly forms the upper edge portion (9) of the first wall (3a), the height h3 is measured along the height of the third protrusion, and the height h3 is greater than the distance H3. The tray (21) according to claim 3, wherein the third protrusion and the first wall (3a) form an angle of 90° or less and greater than 30°.

5. The second layer (5) of the second wall (3b) has a fourth vertically penetrating hole defined by the paperboard of the second layer (5) of the second wall (3b). At least a top edge portion and a bottom edge portion are formed on the paperboard of the second layer of the second wall. The fourth vertically penetrating hole is located between the top edge portion and the bottom edge portion. The top edge portion is positioned at a location of a distance H4, and the distance H4 is measured along the height of the second wall (3b) from a horizontal plane passing through the straight portion of the upper edge portion (35) of the second wall (3b). The second layer (5) of the second wall (3b) has a substantially planar fourth protrusion positioned above the fourth vertically penetrating hole. The substantially planar fourth protrusion has a height h4, and the height h4 is measured between the top edge portion and the fold line. The fold line mainly forms the upper edge portion (35) of the second wall (3b), the height h4 is measured along the height of the fourth protrusion, and the height h4 is greater than the distance H4. The tray (21) according to claim 4, wherein the fourth protrusion and the second wall (3b) form an angle of 90° or less and greater than 30°.

6. The first wall (3a) and the second wall (3b) each have a first length L and a second length L, and the first vertically penetrating hole (6) of the first wall (3a) has a first length l, and the second vertically penetrating hole of the second wall (3b) has a second length l. The ratio of the first length L of the first wall (3a) to the first length l of the first vertically penetrating hole (6) present in the first wall (3a) is 5 to 30, and the ratio of the second length L of the second wall (3b) to the second length l of the second vertically penetrating hole present in the second wall (3b) is 5 to 30. The tray (21) according to claim 1, characterized in that.

7. The upper edge portion (9) of the first wall (3a) has at least a first inner deflection portion (19) that forms the top edge portion of the first protrusion (12). The tray (21) according to claim 1.

8. The tray (21) according to claim 1, wherein an upper edge portion (35) of the second wall (3b) has at least a second inner deflection portion that forms a top edge portion of the second protrusion.

9. An assembly formed of the tray (21) according to any one of claims 1 to 8, further comprising a lid (18) made of a lid wall (17), wherein at least three side walls extend downward from the lid wall, the lid includes a first side wall (16a) and a second side wall (16b), each of the first side wall (16a) and the second side wall (16b) has an inner surface, and on the inner surface, a first embossment (15) and a second embossment (15) protruding toward the inside of the lid (18) are respectively provided, and the first embossment and the second embossment are respectively provided so as to be adapted to be below a first protrusion (12) of a first wall (3a) of the tray (21) and below a second protrusion of a second wall (3b) of the tray (21). An assembly.

10. The assembly according to claim 9, wherein the first embossment (15) has a depth P1 of 0.8 mm to 5 mm, and the second embossment (15) has a depth P2 of 0.8 mm to 5 mm.

11. A blank (20) of a tray (21), wherein the tray (21) is made of paperboard, and the blank (20) of the tray (21) is provided with at least three side surfaces, and the at least three side surfaces include a base portion (22) including at least a first side surface (24) and a second side surface (23), a first portion (25) of a first wall (3a) adjacent to the base portion (22) along the first side surface, a second portion (26) of the first wall (3a) adjacent to the first portion of the first wall (3a), including at least one straight portion (28), the at least one straight portion (28) is arranged to form an upper edge portion (9) of the first wall (3a) of the tray (21), and the second portion (26) of the first wall (3a) has a first longitudinal recess (29) having a length L1, and the first longitudinal recess (29) is a first fold line (27) arranged to form a first longitudinal through hole of the first wall (3a), the first fold line (27) further has a first deflection portion (30) at the first portion (25) of the first wall (3a), and the length of the first deflection portion (30) is greater than the length L1. A first fold line (27). a first portion (31) of a second wall (3b) adjacent to the base portion (22) along the second side face (23); a second portion (32) of the second wall (3b) adjacent to the first portion (31) of the second wall (3b); including at least one straight portion (34), the at least one straight portion (34) being arranged to form an upper edge portion (35) of the second wall (3b) of the tray (21), the second portion (32) of the second wall (3b) having a second longitudinal recess (36) of length L2, the second longitudinal recess (36) being a second fold line (33) arranged to form a second longitudinal through hole of the second wall (3b), the second fold line (33) further having a second deflection portion (37) in the first portion (31) of the second wall (3b), the length of the second deflection portion (37) being greater than the length L2, and the side faces (23, 24) of the base portion (22) being a second fold line (33) formed by grooving and / or cutting and / or half-cutting cardboard, the blank (20) of the tray (21) including the second fold line (33).

12. a first portion (38) of a third wall (3c) adjacent to the base portion (22) along the third side face (40); a second portion (39) of the third wall (3c) adjacent to the first portion (38) of the third wall (3c); a third fold line (41) located between the first portion (38) and the second portion (39) of the third wall (3c) and arranged to form an upper edge portion of the third wall (3c) of the tray (21), the second portion (39) of the third wall (3c) further having an edge portion (42) facing the third fold line (41), a first lateral edge portion (43) and a second lateral edge portion (44) facing each other, and the third fold line (41); a first tab portion (45) extending from the first lateral edge portion (43); a second tab portion (46) extending from the second lateral edge portion (44) of the second portion (39) of the third wall (3c); the first tab portion (45) having a connecting edge portion (47) and a free edge portion (48), the connecting edge portion (47) being connected to the first lateral edge portion (43) of the second portion (39) of the third wall (3c), and a fold line formed by grooving and / or cutting and / or half-cutting being formed; The first tab portion (45) further has a third edge (49) and a fourth edge (50), the third edge (49) and the fourth edge (50) are spaced apart by a distance D1 along the connecting edge (47), and are spaced apart by a distance D2 along the free edge (48), and the distance D1 is greater than the distance D2. The first tab portion (45) is arranged to be guided between a first portion (25) and a second portion (26) of the first wall (3a). The second tab portion (46) has a connecting edge (51) and a free edge (52), the connecting edge (51) is connected to the second lateral edge (44) of the second portion (39) of the third wall (3c), and a fold line formed by grooving and / or cutting and / or half-cutting is formed. The second tab portion (46) further has a third edge (53) and a fourth edge (54), the third edge (53) and the fourth edge (54) are spaced apart by a distance D3 along the connecting edge (51), and the free edge (52) is spaced apart by a distance D4, and the distance D3 is greater than the distance D4. The blank (20) of the tray (21) according to claim 11, wherein the second tab portion (46) is arranged to be guided between a first portion (31) and a second portion (32) of the second wall (3b).

13. The base portion (22) includes four side faces, the first side face (24) and the second side face (23) face each other, and further includes a fourth side face (61) facing the third side face (40). The blank (20) is a first portion (55) of a fourth wall (3d) adjacent to the base portion (22) along the fourth side face (61); a second portion (56) of the fourth wall (3d) adjacent to the first portion (55) of the fourth wall (3d); a fourth fold line (57) located between the first portion (55) and the second portion (56) of the fourth wall (3d) and arranged to form an upper edge of the fourth wall (3d) of the tray (21), wherein the second portion (56) of the fourth wall (3d) includes an edge (58) facing the fourth fold line (57), a first lateral edge (73) and a second lateral edge (62) facing each other, and further includes the fourth fold line (57). The blank (20) is a third tab portion (60) extending from the first lateral edge (73); further including a fourth tab portion (59) extending from the second lateral edge portion (62) of the second portion (56) of the fourth wall (3d); the third tab portion (60) has a connecting edge portion (63) and a free edge portion (64), the connecting edge portion (63) is connected to the first lateral edge portion (73) of the second portion (56) of the fourth wall (3d), and a fold line formed by grooving and / or notching and / or half-cutting is formed; the third tab portion (60) further has a third edge portion (65) and a fourth edge portion (66), the third edge portion (65) and the fourth edge portion (66) are spaced apart by a distance D5 along the connecting edge portion (63), and are spaced apart by a distance D6 along the free edge portion (64), and the distance D5 is greater than the distance D6; the third tab portion (60) is arranged to be guided between the first portion (25) and the second portion (26) of the first wall (3a); the fourth tab portion (59) has a connecting edge portion (67) and a free edge portion (68), the connecting edge portion (67) is connected to the second lateral edge portion (62) of the second portion (56) of the fourth wall (3d), and a fold line formed by grooving and / or notching and / or half-cutting is formed; the fourth tab portion (59) further has a third edge portion (69) and a fourth edge portion (70), the third edge portion (69) and the fourth edge portion (70) are spaced apart by a distance D7 along the connecting edge portion (67), and are spaced apart by a distance D8 along the free edge portion (68), and the distance D7 is greater than the distance D8; the blank (20) of the tray (21) according to claim 12, wherein the fourth tab portion (59) is arranged to be guided between the first portion (31) and the second portion (32) of the second wall (3b).

14. the base portion (22) includes four side surfaces, the first side surface and the second side surface face each other, and further includes a fourth side surface (61) facing the third side surface (40); the blank is a first portion (38) of a third wall adjacent to the base portion along the third side surface (40); a second portion (39) of the third wall adjacent to the first portion of the third wall; A third fold line (41) located between the first and second portions of the third wall and arranged to form the upper edge of the third wall of the tray, wherein the second portion of the third wall has an edge facing the third fold line and first and second lateral edges (43, 44) facing each other, the third fold line (41) being included, The blank is, A first portion (55) of a fourth wall adjacent to the base portion along a fourth side surface, A second portion (56) of the fourth wall adjacent to the first portion of the fourth wall, A fourth fold line (57) located between the first and second portions of the fourth wall and arranged to form the upper edge of the fourth wall of the tray, wherein the second portion of the fourth wall has an edge facing the fourth fold line and first and second lateral edges (73, 62) facing each other, the fourth fold line (57) being further included, The blank is, For example, a first bellows portion, a first portion of fixing means located between the first portion of the first wall and the first portion of the fourth wall, For example, a second bellows portion, a second portion of fixing means located between the first portion of the first wall and the first portion of the third wall, For example, a third bellows portion, a third portion of fixing means located between the first portion of the second wall and the first portion of the fourth wall, For example, a fourth bellows portion, a fourth portion of fixing means located between the first portion of the second wall and the first portion of the third wall, further including the blank (20) of the tray (21) according to claim 11.

15. The first deflecting portion (30) is, A first portion A extending from the first fold line (27) towards the base portion (22), A second portion B substantially parallel to the first fold line (27), A third portion C extending from the second portion B and connected to the first fold line (27), the blank (20) of the tray (21) according to claim 11 having.

16. The second deflecting portion (37) is, A first portion A extending from the second fold line (33) towards the base portion (22), A second portion B substantially parallel to the second fold line (33), A third portion C extending from the second portion B and connected to the second fold line (33), including the blank (20) of the tray (21) according to claim 11.

17. The first fold line (27) has a guideline E passing through the straight portion (28) of the first fold line (27), the first longitudinal recess (29) has a point closest to the guideline E, and when measured along the lateral direction of the second portion (26) of the first wall (3a), the distance between the point closest to the guideline E and the guideline E is H1, and when the distance between the same point closest to the guideline E of the first longitudinal recess (29) and the farthest point of the first deflection portion (30) is h1, h1 is greater than H1. The blank (20) of the tray (21) according to claim 11.

18. The second fold line (33) has a guideline (F) passing through the straight portion of the second fold line (33), the second longitudinal recess (36) has a point closest to the guideline (F), and when measured along the lateral direction of the second portion (32) of the second wall (3b), the distance between the point closest to the guideline (F) and the guideline (F) is H2, and when the distance between the same point closest to the guideline of the second longitudinal recess (36) and the farthest point of the second deflection portion (37) is h2, h2 is greater than H2. The blank (20) of the tray (21) according to claim 11.

19. The second portion (26) of the first wall has a third longitudinal recess having a length L3, the third longitudinal recess is arranged to form a third longitudinal through hole in the first wall, the first fold line (27) further has a third deflection portion in the first portion of the first wall, and the length of the third deflection portion is greater than the length L3. The blank (20) of the tray (21) according to claim 11.

20. The second portion (32) of the second wall has a fourth longitudinal recess having a length L4, the fourth longitudinal recess is arranged to form a fourth longitudinal through hole in the second wall, the second fold line (33) further has a fourth deflection portion in the first portion of the second wall, and the length of the fourth deflection portion is greater than the length L4. The blank (20) of the tray (21) according to claim 11.

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