Folding bottom box with automatic bottom and machine manufacturing process for it

Abstract

Folding bottom box (1) which can be erected from a blank (2) of flexible cardboard or corrugated board material into a cuboid folding box (13), wherein the blank has four rectangular wall panels (3) in a row, which are hinged to one another in the blank (2) by transverse wall fold lines (30), and bottom panels (4) which are at least partially cut free from one another and which are hinged to the wall panels (3) by longitudinal bottom fold lines (40) in the blank (2), wherein two bottom panels (4) are first bottom panels (41, 42), each of which hinges to a bottom adhesive flap (5) by means of a flap fold line (50) which extends obliquely from a near end of the bottom fold line (40) hinges to the first bottom panel (41, 42), and wherein two bottom panels (4) are second bottom panels (43, 44), each of which is hinged to one of the bottom adhesive flaps (5) are adjacent, wherein the folding bottom box (1) is folded flat to form a void-free flat ring,that the bottom adhesive tab (5) articulated to the first bottom panel (41, 42) and the adjacent second bottom panel (43, 44) are glued together in a flat position, and that the bottom panels (4) in the flat ring lie in a plane with the associated wall panels (3) and in extension thereof, wherein each bottom adhesive tab (5) in the flat adhesive bond with the glued second bottom panel (43, 44) can be pivoted by pivoting fold about the tab fold line (50) until it abuts the first bottom panel (41, 42) articulated to the bottom adhesive tab (5), such that the flat ring can automatically erect itself to form a folding box (13) with a bottom (16) formed by the bottom panels (4), characterized in that the bottom panels (4) form a bottom that can be plugged in by means of a plug connection, wherein complementary die-cut elements are provided on free longitudinal edges (47) of the first bottom panels (41, 42). (48) are trained,which interlock with each other during the automatic erection of the floor (14) to form a positive connection between the floor panels (4).

Description

[0001] The present invention relates to a folding bottom box which can be erected from a blank of flexible cardboard or corrugated board material into a cuboid folding box, wherein the blank has four rectangular wall panels in a row, which are hinged to one another in the blank by transverse wall fold lines, and bottom panels which are at least partially cut free of one another and which are hinged to the wall panels by longitudinally directed bottom fold lines in the blank, wherein two bottom panels are first bottom panels which each hinge to a bottom adhesive flap by means of a flap fold line which extends obliquely from a near end of the bottom fold line hinged to the first bottom panel, and wherein two bottom panels are second bottom panels which are each adjacent to one of the bottom adhesive flaps, wherein the folding bottom box is folded flat to form a cavity-free flat ring,that the bottom adhesive flap articulated to the first bottom panel and the adjacent second bottom panel are glued together flat, and that the bottom panels in the flat ring lie in a plane with the associated wall panels and in extension thereof, wherein each bottom adhesive flap in the flat adhesive bond with the glued second bottom panel can be pivoted by swivel folding around the flap fold line until it rests against the first bottom panel to which the bottom adhesive flap articulates, such that the flat ring can automatically erect itself into a folding carton with a bottom formed by the bottom panels, as well as a machine manufacturing process for this.

[0002] One-piece folding bottom boxes of this type are well-known and used for the protection and transport of products of various types and sizes. The principle behind such one-piece folding bottom boxes is described, for example, in DE 1 208 986 A. The bottom has four sections, the first two of which each have a bottom adhesive flap adjacent to the second two sections. These bottom adhesive flaps are glued to their respective second sections in such a way that the bottom forms automatically when the folding box is erected. The bottom sections, folded 180° in the glued blank, lie against the inner sides of their corresponding side wall sections.As can be seen from DE 1 208 986 A, the manufacturing process for such folding bottom boxes is relatively labor-intensive and costly, since the bottom adhesive flaps and subsequently the side wall adhesive flaps must first be coated with adhesive and folded in separate steps. Furthermore, the glued blanks of such folding bottom boxes have an unfavorable packing size. Due to the inwardly folded bottom panels, which regularly only extend over part of the side walls, packages with uneven thickness are created, as sometimes only two, but sometimes four or even five layers of cardboard are stacked on top of each other.

[0003] Alternatively, there are interlocking bottom boxes that do not require gluing, but where the four bottom panels have to be folded in manually, which regularly involves a high amount of work and therefore costs.

[0004] From EP 2 345 591 A1, folding bottom boxes are known in which two bottom panels are glued together via bottom adhesive tabs, which are hinged to the bottom panels by means of tab folding lines, in such a way that the flat ring can be automatically erected to form a folding box with a bottom formed by the bottom panels by pivoting and folding around the tab folding line.

[0005] A disadvantage of these folding bottom boxes is that the bottom panels are not fixed and the folding box can deform back into the state of a flat ring.

[0006] The present invention was therefore based on the objective of providing a folding bottom box that is easy and inexpensive to manufacture and can be erected from its glued blank without much manual effort and remains securely in this erected state.

[0007] The object of invention is achieved with a folding box of the type mentioned at the outset in that the bottom panels form a base that can be plugged in by means of a plug connection, wherein complementary punched elements are formed on free longitudinal edges of the second base panels which interlock with each other when the base is automatically erected to form a positive connection between the base panels.

[0008] These can be locked in place with a simple fingertip. This interlocking connection provides additional stability to the base. Furthermore, since the base panels automatically move into the desired position through folding and gluing, the assembly of the folding-bottom box according to the invention is significantly simpler than that of conventional interlocking-bottom boxes.

[0009] In the flat ring configuration, the bottom panels are aligned with the wall panels, meaning they lie in the same plane. Therefore, with the exception of the area containing the wall adhesive tab (where the flat ring is three-layered), there are only two layers of cardboard stacked on top of each other within the flat ring. This allows for improved palletizing, as there is no material buildup in the bottom panel area – unlike with conventional folding bottom boxes. Compared to conventional tuck-in bottom boxes, handling is significantly simplified, since the bottom panels automatically fold into the designated position when the box is erected, thus forming the base automatically.

[0010] In the folding bottom box according to the invention, two adjacent bottom panels, namely a first bottom panel having a bottom adhesive flap and a second bottom panel adjacent to the bottom adhesive flap, can be connected to each other via a flap-bottom panel folding line. In this way, either two or two sets of two bottom panels can be connected to each other. This results in a particularly compact and stable design.

[0011] In a further advantageous embodiment, a first bottom panel edge of the second bottom panel, oriented transversely in the blank, is separated by a cut-out from a bottom flap edge of the bottom adhesive flap, also oriented transversely in the blank. In this case, all four bottom panels can be cut out from each other, so that in this embodiment it is possible to use a conventional blank having four cut-out bottom surfaces for a folding bottom box according to the invention.

[0012] Particularly preferred in this case are the first edge of the base of the second base and the edge of the base tab cut out from it, forming congruent contours in the flat ring such that the bottom adhesive tab is flush with the second base at the corner edge of the flat ring. This ensures a uniform corner edge in the flat ring. In a particularly preferred embodiment, the cutout between the edge of the base tab and the first edge of the second base is formed by a straight slot. In another particularly preferred embodiment, the cutout between the edge of the base tab and the first edge of the second base is formed by a recess that widens towards the cut edge.

[0013] A material-saving, yet very stable variant is obtained if, in the flat ring, a second bottom field edge of the second bottom field runs transversely in the cut from the outer end of the tab fold line in the flat ring to the bottom fold line that directs the second bottom field.

[0014] Closing the row of wall panels to form a flat ring is possible in various ways, for example using a strip of adhesive tape. A particularly simple method is to close the row of wall panels to form a flat ring using a wall adhesive tab hinged to an outer wall fold line, thus creating an adhesive connection.

[0015] The folding bottom box according to the invention can be used wherever known folding bottom boxes are used. Depending on the application, the folding bottom box can be open at the top. Alternatively, the folding bottom box can have a lid. This lid can be made from a separate blank. However, a lid is particularly easy to obtain if the folding bottom box according to the invention has lid panels that are hinged lengthwise to the wall panels by means of lid fold lines. The lid panels can be designed in different ways. Suitablely, four lid panels, each cut free of any other, are provided. These can be rectangular and form extensions of the wall panels. They can have slots that allow for a particularly simple yet stable interlocking closure of the lid panels. It is also possible to have only a single lid panel that closes the box by means of a flap.However, all other known types of lid panels can also be used in the folding bottom box according to the invention.

[0016] The folding bottom box according to the invention has many possible uses. In particular, it can be a packaging box. It can also be a flat tray. In this case, the wall panels are designed with a comparatively low height. Furthermore, the folding bottom box according to the invention can be a rimmed lid for a packaging box or a cover. It is also possible for one folding bottom box according to the invention to form the bottom part, and a second folding bottom box according to the invention to form the lid part of a packaging box with a rimmed lid.

[0017] Furthermore, it is advantageous if at least one bottom adhesive tab has a protruding insert section at the edge of the cut, which forms part of the interlocking connection. This design contributes to a particularly good and secure interlocking of the floor panels and thus to a particularly stable floor.

[0018] Corrugated cardboard is particularly suitable as a material for the folding bottom boxes according to the invention. The corrugation is preferably perpendicular to the cut surface.

[0019] For bonding the adhesive tabs to the corresponding areas on the second floor panels, a hot-melt adhesive is preferably used. The adhesive can be applied either to the adhesive tabs themselves or to the corresponding bonding points on the cut-out, where the adhesive tabs will lie when folded. Of course, it is also possible to apply the adhesive to both the adhesive tab and the corresponding bonding point, or to apply adhesive to the adhesive tab in one case and the corresponding bonding point in the other. To facilitate correct application of the adhesive in this case, the boundaries of the corresponding bonding points can be indicated by a guideline created using a peg.

[0020] Furthermore, the present invention comprises a method for the machine-based production of a cavity-free flat ring of a folding bottom box, which can be erected from the state of the flat ring with a self-forming bottom, wherein the production is carried out continuously in a production machine with integrated work steps.

[0021] In the methods known to date, the folding bottom box is manufactured by first folding the bottom panels onto the wall panels, as described, for example, in DE 1 208 986 A. The bottom adhesive tabs are then folded over and coated with adhesive. The wall adhesive tab is also coated with adhesive. A disadvantage of this method is that the adhesive must be applied from two different sides. While, as in Fig. As shown in DE 1 208 986 A, the bottom adhesive tabs are provided with adhesive on the top side, whereas the adhesive must be applied to the underside of the side adhesive tabs. This means that either a device with adhesive nozzles on two sides is required for production, or the application of the adhesive must be carried out in several steps, making production complex and cumbersome.

[0022] From EP 2 345 591 A1, a method for manufacturing folding bottom boxes is known in which two wall panels and their corresponding bottom panels are folded around vertical fold lines, wherein the bottom and wall adhesive tabs are first provided with adhesive to form a flat ring as described above. In this method, the additional folding of the bottom panels onto the wall panels is omitted.

[0023] The object of the present invention was also to provide a manufacturing process for a folding bottom box that is simple, allows the application of the adhesive in a single step and otherwise requires as few process steps as possible.

[0024] The object is achieved according to the invention by a method for the machine production of a cavity-free flat ring of a folding bottom box, which can be erected from the state of the flat ring with a self-forming bottom, wherein the production is carried out continuously in a production machine with integrated work steps, comprising the following process steps: (1) A cardboard or corrugated board format is fed to a die-cutting station of the manufacturing machine for the first operation; (2) In the first operation, a blank of the folding bottom box is die-cut from the cardboard or corrugated board format, the blank having four rectangular wall panels in a row, which are hinged to each other in the blank by transverse wall fold lines, and bottom panels cut free from each other, which are hinged to the wall panels by longitudinal bottom fold lines in the blank, wherein two bottom panels are first bottom panels, each of which hinges to a bottom adhesive flap by means of a flap fold line that originates from a near end of the bottom fold line hinged to the first bottom panel, running obliquely to it, and wherein two bottom panels are second bottom panels, each of which is adjacent to one of the bottom adhesive flaps, wherein a transverse first bottom panel edge of the second bottom panel is delimited by a free cut from a transverse bottom flap edge of the bottom adhesive flap in the blank,and wherein at least one wall adhesive tab is hinged to at least one transverse free edge of the series of wall panels by means of a wall fold line; (3) In a second step, an adhesive is applied to all adhesive tabs forming bonding points, i.e. the at least one wall adhesive tab and the floor adhesive tabs or, in particular, also to field sections of the second floor fields to be bonded with the floor adhesive tabs, exclusively on one surface side of the blank; (4) In a third operation carried out in a folding station, the blank is folded flat into a cavity-free flat ring such that the bottom adhesive flap hinged to the first bottom panel and the adjacent second bottom panel are glued together flat and the bottom panels in the flat ring lie in a plane with and in extension of the associated wall panels, each bottom adhesive flap in the flat adhesive bond with the glued second bottom panel can be pivoted by pivot folding around the flap fold line until it rests against the first bottom panel to which the bottom adhesive flap is hinged, such that the flat ring can automatically erect itself into a folding box with a bottom formed by the bottom panels, in the first operation the bottom flap edge and the first bottom panel edge of the second bottom panel are cut with the same contour by means of a symmetrical relief cut, such thatthat at the resulting corner edge of the flat ring folded in the third step, the bottom adhesive tab is flush with the second bottom field.

[0025] The inventive method enables a very simple production of folding bottom boxes. All three adhesive flaps – the two bottom adhesive flaps and the corresponding adhesive point on one side wall – can be supplied with adhesive in a single step. For example, two additional glue nozzles can be provided, allowing simultaneous gluing at three points.

[0026] In just a few steps – cutting and forming the fold lines, applying the adhesive, and folding twice along the two wall fold lines, which in their extension form the longitudinal edge of each bottom adhesive tab – the flat ring of the folding bottom box according to the invention is formed. The latter can then be unfolded by simply standing upright its wall sections; the bottom is formed automatically by standing upright the wall sections.

[0027] The present invention makes it possible to manufacture folding bottom boxes inline. Due to the uniform thickness of the flat ring, it is also particularly easy to palletize. A simplified process compared to the prior art thus yields an improved product.

[0028] The inventive method can be carried out even more efficiently if the second operation is performed in a separate gluing station and is superimposed on the first operation of cutting. This parallel execution of the two operations is possible because the adhesive only needs to be applied to one side of the cut piece.

[0029] Particularly preferred, and in one embodiment particularly advantageous, is the provision of a folding edge between the bottom flap edge and the first bottom field edge of the second bottom field.

[0030] In another suitable embodiment, in the first step a second bottom field edge of the second bottom field, directed transversely in the cut, is cut in such a way that it lies in the flat ring congruent with the flap fold line.

[0031] The inventive method makes it possible to produce a folding bottom box very simply and in just a few steps, as only one gluing step is required in addition to the cutting, which can also be carried out parallel to the cutting. In a further step, the two folds are made, which also effect the three gluing operations (two adhesive strips on the bottom to the corresponding section of the second bottom panel and one adhesive strip on the side panel to the wall adhesive strip). The folding bottom box according to the invention can then be very easily erected from the flat ring into the finished box, as the bottom is automatically formed by erecting the side walls.

[0032] The dependent claims are directed to the aforementioned and other suitable and advantageous embodiments of the invention. Only particularly suitable and advantageous forms and possibilities of design are described in more detail below with reference to the exemplary embodiments shown in the schematic drawing. Each described individual or detailed design within an exemplary embodiment is to be understood as a structurally independent detailed example of other embodiments and designs falling within the scope of the invention that are not described or not fully described.

[0033] They show Fig. 1 a folding bottom box blank, as known from the prior art, in a first embodiment in a top view of the inside of the blank, Fig. 2 the folding bottom box cut according to Fig. 1 in a phase of folding into its pre-folded, prefabricated state as a flat ring, Fig. 3 the folding bottom box blank in the glued, semi-erected state, Fig. 4 The fully erected folding bottom box in its used state in a perspective view from the bottom side, Fig. 5 another embodiment of a folding bottom box blank in a glued, flat state as a flat ring and Fig. 6 a folding bottom box blank according to the invention in a top view of the inside of the blank.

[0034] Fig. Figure 1 shows a blank 2 of a folding bottom box 1 in a first embodiment, in a top view of the inside of the blank. Such a blank is produced in a first step from flexible cardboard or corrugated board material in a method for producing a cavity-free flat ring. The folding bottom box 1 can be erected from a blank 2 made of flexible cardboard or corrugated board material into a cuboid folding box 13. The blank 2 has four rectangular wall panels 3 in a row, which are hinged to one another in the blank 2 by transverse wall fold lines 30, 301, 302, as well as bottom panels 4 that are at least partially cut free from one another. These are hinged to the wall panels 3 by longitudinal bottom fold lines 40 in the blank 2.Two base panels 4 are first base panels 41, 42, each of which articulates a base adhesive tab 5 by means of a tab fold line 50 extending obliquely from a near end of the base fold line 40 articulated to the first base panel 41, 42. Two further base panels 4 are second base panels 43, 44, each adjacent to one of the base adhesive tabs 5. In the first embodiment, all four base panels are cut free from each other. In particular, a first base panel edge 401 of the second base panel 43, 44, oriented transversely in the cutout 2, is delimited by a cutout 45 from a base tab edge 51 of the base adhesive tab 5, also oriented transversely in the cutout 2. The cutout between the base tab edge 51 and the first base panel edge 401 of the second base panel 43, 44 is formed by a straight slot 45.Between the bottom edge 403 of the first bottom panel 41, 42 and the second bottom edge 402 of the second bottom panel 43, 44, the clearance is formed by a recess 46, which widens towards the edge of the cut. In the flat ring, the second bottom panel edge 402 of the second bottom panel 43, 44, which is oriented transversely in the cut 2, runs from the outer end of the tab fold line 50 in the flat ring to the bottom fold line 40 that connects the second bottom panel 43, 44.

[0035] The folding bottom box 1 of the first embodiment has four lid panels 6 which are hinged longitudinally to the wall panels 3 via lid folding lines 60.

[0036] A wall adhesive tab 35 is hinged to an outer wall fold line 303 on an outer wall panel 3 in the cut-out. By means of this, the series of wall panels 3 can be closed to form a flat ring by means of an adhesive connection with an adhesive point 7 on the next outer wall panel 3, as shown in Fig. 2 is shown. The adhesive compound 70 can be applied in a second process step in parallel to all three adhesive sections 5, 7 of the blank 2, namely the bottom adhesive tabs 5 and the adhesive point 7.

[0037] In the next step, the blank is first folded inwards along wall fold line 301. A section 52 of the second bottom adhesive tab 43, corresponding to the bottom adhesive tab 5, is glued onto the bottom adhesive tab 5. With a short delay, the blank is then folded inwards again along wall fold line 302. During this process, a second section 52 of the second bottom adhesive tab 44, corresponding to the second bottom adhesive tab 5, is glued onto the bottom adhesive tab 5, and the adhesive point 7 is glued onto the wall adhesive tab 35.

[0038] The folding bottom box 1 is thus folded flat into a void-free flat ring 15 such that the bottom adhesive tab 5, which is hinged to the first bottom panel 41, 42, and the adjacent second bottom panel 43, 44 are glued together flatly, and that the bottom panels 4 in the flat ring 15 lie in the same plane as the associated wall panels 3 and in line with them. This results in a flat ring 15 of very uniform thickness, since, with the exception of the area of ​​the side adhesive tab 35, only two layers of material lie on top of each other.

[0039] As in Fig. As can be clearly seen in Figure 2, the first bottom field edge 401 of the second bottom field 43, 44 and the bottom flap edge 51 cut free from it are formed in the flat ring with identical contours, such that the bottom adhesive flap 5 is aligned with the second bottom field 43, 44 at the corner edge 151 of the flat ring 15.

[0040] In Fig. Figure 3 shows the glued folding bottom box ring 12 during the process of erecting the flat ring 15 into the folding bottom box 1. Each bottom adhesive flap 5, in the flat adhesive bond with the glued second bottom panel 43, 44, is pivoted by folding around the flap fold line 50 until it rests against the first bottom panel 41, which articulates the bottom adhesive flap 5. This allows the flat ring 15 to automatically erect itself into the folding bottom box 13 with a bottom 16 formed by the bottom panels 4. The pivot axis is marked with reference numeral 501. The folding directions are indicated: clockwise (reference numeral 502) and counterclockwise (reference numeral 503). The finished folding bottom box 1 is shown in Fig. Figure 4 shows the base 16 facing upwards. The four base fields 41, 42, 43, 44 are visible. The adhesive surfaces for the base are located on the underside of base fields 43 and 44 (not shown).

[0041] In Fig. Figure 5 shows another embodiment of a folding bottom box blank 2 in a glued, flat-lying state as a flat ring 15. The blank 2 is already folded around the wall fold lines 301 and 302 and glued over the bottom adhesive tabs 5, one of which is visible from its outside, and the (not visible) wall adhesive tab. Two of the wall panels 3 and the bottom panels 42 and 43 are visible. The two other bottom panels 41 and 44 lie beneath the bottom panels 42 and 43 and are therefore not visible. The in Fig. The embodiment shown in Figure 5 has no lid panels. It is either used open without a lid, closed with a separate lid, or itself used as a lid for a carton, which can also be a folding bottom box according to the invention.

[0042] Fig. Figure 6 shows a folding bottom box blank 2 according to the invention in a top view of the inside of the blank. The same reference numerals denote the same parts as in the Fig. embodiment shown in 1. Unlike the embodiment shown in Fig. In the embodiment shown in 1, the cut 2 of the Fig. 6 no free-cut slot 45. Instead, two adjacent soil fields 41 and 43 as well as 42 and 44, namely a first soil field 41, 42 having a soil adhesive flap 5 and a second soil field 43, 44 adjacent to the soil adhesive flap, are connected to each other via a flap-soil field fold line 45a.

[0043] Furthermore, the adhesive compound 70 is used in the Fig. In the embodiment shown in Figure 6, the adhesive is applied once to the adhesive tab 5 on the wall panel 3 and once to the adhesive point 52. To make the adhesive point 52 more easily identifiable, a boundary line 53 is marked on the first floor panel 43 by means of pinholes.

[0044] At the in Fig. In the embodiment shown in Figure 6, the base panels 4 form a base that can be plugged together by means of a plug-in connection. Complementary punched elements 48 are formed on the free longitudinal edges 47 of the first base panels 41, 42, which interlock with each other to form a positive connection between the base panels 4 when the base self-erects. The two base adhesive tabs 5 have a plug-in section 481 projecting transversely from the edge of the blank 2, which is an integral part of the plug-in connection. In this way, the base panels 4 can interlock particularly well with each other, resulting in a particularly stable connection.

Claims

[1] Folding bottom box (1) which can be erected from a blank (2) of flexible cardboard or corrugated board material into a cuboid folding box (13), wherein the blank has four rectangular wall panels (3) in a row, which are hinged to one another in the blank (2) by transverse wall fold lines (30), and bottom panels (4) which are at least partially cut free from one another and which are hinged to the wall panels (3) by longitudinal bottom fold lines (40) in the blank (2), wherein two bottom panels (4) are first bottom panels (41, 42), each of which hinges to a bottom adhesive flap (5) by means of a flap fold line (50) which extends obliquely from a near end of the bottom fold line (40) hinges to the first bottom panel (41, 42), and wherein two bottom panels (4) are second bottom panels (43, 44), each of which is connected to one of the bottom adhesive tabs (5) are adjacent, wherein the folding bottom box (1) is folded flat to form a void-free flat ring,that the bottom adhesive tab (5) articulated to the first bottom panel (41, 42) and the adjacent second bottom panel (43, 44) are glued together flat, and that the bottom panels (4) in the flat ring lie in a plane with the associated wall panels (3) and in extension thereof, wherein each bottom adhesive tab (5) in the flat adhesive bond with the glued second bottom panel (43, 44) can be pivoted by pivoting fold about the tab fold line (50) until it abuts the first bottom panel (41, 42) articulated to the bottom adhesive tab (5) in such a way that the flat ring can automatically erect itself to form the folding box (13) with a bottom (16) formed by the bottom panels (4), , characterized by, that the floor panels (4) form a floor which can be plugged in by means of a plug connection, wherein complementary punched elements (48) are formed on free longitudinal edges (47) of the first floor panels (41, 42) which interlock with each other when the floor (14) is automatically erected. [2] Folding bottom box according to claim 1, characterized by , that at least one bottom adhesive tab (5) has a plug-in section (481) projecting in the transverse direction of the cut (2) at its edge, which is a component of the plug-in connection. [3] Folding bottom box according to claim 1 or 2, characterized by , that a first floor field edge (401) of the second floor field (43, 44) with a free cut (45) is delimited from a floor flap edge (51) of the floor adhesive flap (5) that is directed transversely in the cut (2). [4] Folding bottom box according to claim 3, characterized by, that in the flat ring the first bottom field edge (401) of the second bottom field (43, 44) and the bottom flap edge (51) cut free from it are formed with identical contours, such that at the corner edge (151) of the flat ring (15) the bottom adhesive flap (5) is congruent with the second bottom field (43, 44). [5] Folding bottom box according to claim 4, characterized by , that the clearance between the bottom flap edge (51) and the first bottom edge (401) of the second bottom field (43, 44) is formed by a straight slot (45). [6] Folding bottom box according to claim 4, characterized by , that the clearance between the bottom edge (403) of the first bottom field (41, 42) and the second bottom edge (402) of the second bottom field (43, 44) is formed by a recess (46) which widens in the cut towards the cut edge. [7] Folding bottom box according to any one of claims 1 to 6, characterized by, that in the flat ring a second bottom field edge (402) of the second bottom field (43, 44) runs transversely in the cut (2) from the outer end of the flap fold line (50) in the flat ring to the bottom fold line (40) which directs the second bottom field (43, 44). [8] Folding bottom box according to any one of claims 1 to 7, characterized by , that the series of wall panels (3) is closed to form a flat ring by means of a wall adhesive tab (35) hinged to an outer wall fold line (303), forming an adhesive connection. [9] Folding bottom box according to any one of claims 1 to 8, characterized by , that the folding bottom box (1) has lid panels (6) which are hinged lengthwise to the wall panels (3) with lid folding lines (60). [10] Folding bottom box according to any one of claims 1 to 9, characterized by , that the folding bottom box (1) is a packaging box. [11] Folding bottom box according to any one of claims 1 to 8, characterized by, that the folding bottom box (1) is a flat tray. [12] Folding bottom box according to any one of claims 1 to 8, characterized by , that the folding bottom box (1) is a rimmed lid for a packaging box or a hood. [13] Method for the machine production of a void-free flat ring of a folding bottom box (1) which can be erected from the state of the flat ring with a self-forming bottom (14), wherein the production is carried out continuously in a production machine with integrated operations, comprising the following process steps: (1) A cardboard or corrugated board format is fed to a die-cutting station of the manufacturing machine for the first operation; (2) In the first operation, a blank (2) of the folding bottom box (1) is die-cut from the cardboard or corrugated board format, wherein the blank (2) has four rectangular wall panels (3) in a row, which are hinged to one another in the blank (2) by transverse wall fold lines (30), and bottom panels (4) cut free from one another, which are hinged to the wall panels (3) by longitudinal bottom fold lines (40) in the blank (2), wherein two bottom panels (4) are first bottom panels (41, 42), each of which hinges to a bottom adhesive flap (5) by means of a flap fold line (50) that extends obliquely from a near end of the bottom fold line (40) hinges to the first bottom panel (41, 42), and wherein two bottom panels (4) are second bottom panels (43, 44), each of which is adjacent to one of the bottom adhesive flaps (5), wherein a in the cut (2) transversely directed first floor field edge (401) of the second floor field (43,44) is delimited by a free cut from a transverse bottom flap edge (51) in the cut (2) of the bottom adhesive flap (5), and wherein at least one wall adhesive flap (35) is hinged to at least one transverse free edge of the row of wall panels (3) by means of a wall fold line (303); , (3) In a second step, an adhesive (70) is applied exclusively to one surface side of the blank (2) on all adhesive tabs forming adhesive points (7), that is, at least one wall adhesive tab (35) and the bottom adhesive tabs (5) or, in particular, also additionally on field sections (52) of the second floor fields (43, 44) to be bonded to the bottom adhesive tabs (5); (4) In a third operation carried out in a folding station, the blank (2) is folded flat into a cavity-free flat ring such that the bottom adhesive tab (5) articulated to the first bottom panel (41, 42) and the adjacent second bottom panel (43, 44) are glued together flatly and that the bottom panels (4) in the flat ring lie in a plane with the associated wall panels (3) and in extension thereof, wherein each bottom adhesive tab (5) in the flat adhesive bond with the glued second bottom panel (43, 44) can be pivoted by pivoting fold about the tab fold line (50) until it rests against the first bottom panel (41, 42) articulated to the bottom adhesive tab (5) in such a way that the flat ring can automatically erect itself to form a folding box (13) with a bottom (16) formed by the bottom panels (4). characterized by, that in the first step the bottom flap edge (51) and the first bottom field edge (401) of the second bottom field (43, 44) are cut contour-matched by means of a symmetrical free cut, such that at the resulting corner edge (151) of the flat ring (15) folded in the third step the bottom adhesive flap (5) is aligned with the second bottom field (43, 44). [14] Method according to claim 13, characterized by that the second step is carried out in a separate gluing station and is superimposed on the first step. [15] Method according to any one of claims 13 to 14, characterized by , that in the first step a second bottom field edge (402) of the second bottom field (43, 44) directed transversely in the cut (2) is cut in such a way that it lies in the flat ring congruent with the flap fold line (50).

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