EP1597160B1 - Folding bag - Google Patents

Description

TECHNICAL AREA

The present invention relates to a folding box with side walls and a bottom unit and / or a lid unit, wherein at least one side wall in the unfolded state of the carton has a convex curvature.

Such cartons are used in large quantities, for example, for packaging products from the cosmetics and / or pharmaceutical industry.

STATE OF THE ART

There are known folding boxes of various kinds. European Patent Application EP 0 879 766 A1 describes a folding box of the type mentioned in the introduction, which has two opposite, convexly curved side walls and has an oval cross-sectional contour.

As an example, see also document US-A-2 326 648.

PRESENTATION OF THE INVENTION

The present invention is based on the technical problem or object to provide a carton of the type mentioned, which can be produced economically, can be folded in a flat state for transport to the filler, easy unfoldable and ensures safe storage of the packaged object , In addition, a simple ground unit should be used, while ensuring a high load capacity. In addition, the carton should offer the opportunity to secure the lid unit against accidental opening.

The carton according to the invention is given by the features of independent claim 1. Advantageous embodiments and further developments are the subject of claims dependent directly or indirectly from the independent claim 1.

The carton according to the invention is accordingly characterized in that on the inner wall of the convexly curved side wall at least one support unit is connected, which has a first adhesive tab and a second adhesive tab, which are connected to the inner wall and spaced apart in the direction of curvature, and between the first and second adhesive tabs a support tab is present, which is connected via a first or second Stützlaschenfaltlinie to the first and second adhesive tab, wherein the length of the support tab corresponds to the distance between the first and the second adhesive tab and the support tab in the unfolded state of the carton Inside the carton is foldable or unfolds automatically when unfolding the carton into the interior of the carton.

In a preferred embodiment, several support units can be present next to one another in the direction of curvature.

A particularly compact carton, which can be easily folded up and ensures a high load-bearing capacity, is characterized in that the folded carton has two convexly curved side walls opposite each other in the unfolded state, resulting in an oval or round cross-sectional shape, and support units arranged on the inside of the side walls ,

In a first embodiment, the support tab in the unfolded state has a convex curvature in the interior of the carton.

A particularly preferred embodiment is characterized in that the support tab has at least one further support tab folding line which runs parallel to the first or second support tab fold line and is arranged in particular centrally on the support tab. By providing a further support tab folding line, the unfolding process is facilitated.

A particularly advantageous embodiment is characterized in that the support tab is double-walled, which on the one hand has increased payloads and on the other hand ensures an automatic unfolding of the support tab in the interior of the carton when unfolding the entire carton due to the high rigidity of the double-walled support tab.

According to a preferred embodiment, the support tab is located directly below the floor unit and / or directly above the lid unit.

With regard to the production of a folding box from a one-piece blank, a particularly advantageous development is characterized in that the bottom unit and / or the lid unit is connected via a bottom fold line or cover fold line to the inner wall of a side wall element, wherein the bottom fold line or cover fold line substantially on the same Height level is arranged as the upper or lower edge of the unfolded support tab.

A structurally particularly simple to implement embodiment, which ensures a particularly simple Auffaltvorgang and enables secure positioning of Deckelbeziehungsweise bottom unit is characterized in that between bottom unit or cover unit via a Bodenenklebelfaltfaltlinie or a Deckelellaschenfaltlinie connected to the respective side wall bottom adhesive flap or a Deckelklebelasche is present , which is connected on the inside with the corresponding side wall.

With regard to the above-mentioned one-piece blank for the carton, a particularly preferred embodiment is characterized in that the first and second adhesive tab of the support unit are integrally formed on the lower and / or upper end edge of a side wall element via a first or second adhesive flap folding line and between side wall and Support tab a slot is present. In this case, according to a preferred embodiment, the double-walledness of the support tab can be implemented in a constructive manner in such a simple manner that at least one reinforcement tab is present, which is connected to the support tab via a reinforcing tab fold line, which extends in particular parallel to the first or second adhesive tab fold line.

A particularly preferred embodiment with respect to the stability of the entire folding box is characterized in that the bottom unit and / or the lid unit have an outer peripheral contour which substantially corresponds to the inner peripheral contour of the folded box formed by the curved side walls.

To increase the carrying capacity, the floor unit and / or the cover unit may be double-walled.

As a material for the carton or the blank cardboard or cardboard-like material or plastic material is preferably used.

Further embodiments and advantages of the invention will become apparent from the features further listed in the claims as well as by the embodiments given below. The features of the claims may be combined in any manner as far as they are not obviously mutually exclusive.

BRIEF DESCRIPTION OF THE DRAWING

Fig. 1 bis 5

Detailquerschnitt durch eine konvex gekrümmte Seitenwand einer Faltschachtel mit jeweils unterschiedlich ausgebildeter, ins Innere der Faltschachtel aufgefalteter Stützeinheit,

Fig. 6 bis 16

schematische Ansichtsdarstellung des Zuschnitts eines Ausführungsbeispiels einer Faltschachtel mit Stützeinheiten in unterschiedlichen Faltzuständen des Zuschnitts, nämlich vom ursprünglichen Zuschnitt (Fig. 6) bis zum flach gefalteten Transportzustand der Faltschachtel (Fig. 16),

Fig. 17

perspektivische Detailansicht des Bodenbereiches der aus dem Zuschnitt gemäß Fig. 6 gebildeten, aufgefalteten Faltschachtel und

Fig. 18 und 19

perspektivische Detailansicht des Deckelbereiches der aus dem Zuschnitt gemäß Fig. 6 gebildeten, aufgefalteten Faltschachtel bei unterschiedlichem Faltzustand der Stützeinheit.

The invention and advantageous embodiments and developments thereof are described in more detail below with reference to the examples shown in the drawing and explained. The features to be taken from the description and the drawing can be applied individually according to the invention or to a plurality of them in any desired combination. Show it:

Fig. 1 to 5

Detail cross-section through a convexly curved side wall of a folding box, each with differently designed, folded into the interior of the carton support unit,

Fig. 6 to 16

schematic view of the blank of an embodiment of a carton with support units in different folding states of the blank, namely from the original blank (Figure 6) to the flat folded transport state of the carton (Figure 16),

Fig. 17

perspective detailed view of the bottom portion of the formed from the blank of FIG. 6, unfolded carton and

FIGS. 18 and 19

perspective detailed view of the lid portion of the folded from the blank of FIG. 6 formed, unfolded carton in different folding state of the support unit.

WAYS FOR CARRYING OUT THE INVENTION

In the figures 1 to 5 is a detail of a convex outwardly curved side wall 12 of a folding box, not shown. The interior of the (unfolded) carton is provided with the reference numeral 48.

In the exemplary embodiment according to FIG. 1, a support unit 20.1 is provided on the inner wall of the side wall 12, which is glued to the inner wall of the side wall 12 via a first adhesive tab 22 and a second adhesive tab 24 spaced apart in the direction of curvature (circumferential direction). Via a first Stützlaschenfaltlinie 32 and a second Stützlaschenfaltlinie 34 is a support tab 30.1 integrally formed between the two adhesive tabs 22, 24, the convex into the interior 48 of the Folded box is curved folded. The first glue flap folding line 26 and the second glue flap folding line 28 are perpendicular to the sheet plane.

The second embodiment according to FIG. 2 differs from the exemplary embodiment according to FIG. 1 in that a support unit 20 is present which has a support lug 30, which has a further support lug folding line 36 in the middle, so that the support lug 30 in the unfolded state in the form of a Triangle point in the interior 48 of the carton towers.

In the third embodiment according to FIG. 3, the support unit 20 has two reinforcement tabs 38, which are glued to the support tab 30.

In the fourth exemplary embodiment according to FIG. 4, a support unit 20. 2 is illustrated, the support lug 30. 2 of which has two further support lug folding lines 36 arranged at a distance from one another, so that the unfolded support lug 30. 2 assumes a polygonal course.

FIG. 5 shows an alternative embodiment in which two support units 20 arranged next to one another are connected to the inner wall of the side wall element 12.

In Fig. 6, the blank of a carton 10 is shown in the unfolded state in an outside view.

The folding box 10 has a first rectangular side wall 12, to which a second side wall 14 is integrally formed over a first side wall folding line 13. At the first side wall fold line 13 opposite longitudinal edge of the second side wall 14 is a second Seitenwandfaltlinie 15 an inner wall 16 is formed. In the unfolded state, the first side wall 12 and the second side wall 14 form a convexly outwardly curved peripheral contour.

At the lower end longitudinal edge of the second side wall 14, a support unit 20 is formed, which will be described below. The support unit 20 has in each case in the left and right edge region on a first adhesive tab 22 and a second adhesive tab 24. Both adhesive tabs 22, 24 are integrally formed on the second side wall 14 via a first adhesive flap folding line 26 and a second adhesive flap folding line 28, respectively. The clear distance between the two adhesive tabs 22, 24 is designated A1 in FIG. In this distance range A1, a support tab 30 is formed on the first adhesive tab 22 via a first support tab fold 32 and on the second adhesive tab 24 via a second support tab fold 34, wherein a slot 44 is present between the support tab 30 and the second side wall 14. The two support plate folding lines 32, 34 are perpendicular to the adhesive flap folding line 26, 28. In the middle, the support tab 30 has a further, parallel to the support tab folding lines 32, 34 extending further Stützlaschenfaltlinie 36th

In the region between the further support tab fold line 36 and the first adhesive tab fold line 26 or the second adhesive tab fold line 28, a reinforcing tab 38 is integrally formed on the lower longitudinal edge of the support tab 30 via a respective reinforcing tab fold line 40 which has substantially the same surface contour as the respective half support tab 30.

In the end region of the first adhesive flap 22 or the second one adjoining the first adhesive flap folding line 26 and second adhesive flap folding line 28, respectively Adhesive tab 24 are parallel to the adhesive flap folding lines 26, 28 each formed three further embossing fold lines 42, which ensure a good adaptation of the first and second adhesive tabs 22, 24 to the second side wall 14 convexly curved in the unfolded state.

At the lower end edge of the inner side wall 16, a further support unit 20 is formed, which has the same structural design as the support unit 20 described above, so that can be dispensed with their repeated description.

At the upper front longitudinal edge of the first side wall 12, a further support unit 50 is formed, which in principle - except for the reinforcing tabs 38 - have the same structure as the support unit 20 described above, but has other geometric dimensions. Here, too, a first adhesive flap 52 and a second adhesive flap 54 arranged at a distance A2 are respectively formed on the first side wall 12 via a first glue flap folding line 53 or a second glue flap folding line 55. In the distance region A2, a support tab 56 is integrally formed on the first adhesive tab 52 and the second adhesive tab 54 via a first support tab fold line 57 and a second support tab fold line 58, respectively. Between support tab 56 and upper end edge of the first side wall 12, a slot 59 is also present. In the middle, the support lug 56 has a further support lug folding line 68 as well as a recess 69 arranged centrally at the lower edge region of the support lug 56 and open towards the slot 59.

At the upper end longitudinal edge of the second side wall 14 is a Deckelklebelaschenfaltlinie 76 a Deckelklebelasche 72 integrally formed. At which the lid is adhesive flap fold line 76 opposite edge region of the lid adhesive flap 72 is integrally formed on a cover fold line 74, a cover unit 70. In its upper edge region, the cover unit 70 has an upwardly open part-circular recess 78.

The inner side wall 16 has on the upper side an upwardly and to the left-open recess 46, such that in the lower region a virtually square inner side wall region is formed, in which a strip-shaped region results upward along the second side wall fold line 15.

In the upper end edge region of the square surface area of the inner side wall 16, a trapezoidal tapered bottom adhesive flap 62 is integrally formed on a bottom crease folding line 66, to which in turn a bottom unit 60 is integrally formed on the upper side via a bottom fold line 64. The inner side wall 16, the second side wall 14 and the first side wall 12 have substantially the same width. Both the bottom unit 60 and the cover unit 70 have an outer contour in the form of an oval, the geometry being selected such that in the unfolded state of the folded box, the side walls 12, 14 and 16, respectively, bear convexly curved inside contours.

The distance of the bottom crease fold line 66 from the bottom crease line 64, that is, the length H1 of the bottom flap tab 62, is such that when the bottom flap tab 62 is folded inwardly about the bottom crease tab line 66, the bottom fold line 64 is in the immediate vicinity of the top edge of the support unit 20 in the inward folded condition is arranged.

The distance of the lid adhesive flap fold line 76 from the lid fold line 74, that is the length of the lid adhesive flap 72, is such that the lid fold line 74 is arranged in the immediate edge area of the inwardly folded support tab 56 when the lid adhesive flap 72 is folded inwardly around the lid adhesive flap fold line 76.

In the following, the individual folding operations for folding the unfolded blank to the flat transport state of the folding box will be described with reference to FIGS. 7 to 16.

Fig. 7 shows a view of the blank, seen from the inside of the folding box to be folded, that is, a relation to the illustration in Fig. 6 by 180 ° (old degree) rotated blank. In this case, the reinforcing tabs 38 are already folded inwards in a first folding operation on the support tabs 30 of the support unit 20 (arrows F1) along the respective reinforcing tab folding lines 40 and bonded thereto (adhesive surfaces shown dotted).

In the next step, as shown in FIG. 8, both support units 20 are folded inwardly along the first and second adhesive flap fold lines 26, the first and second adhesive tabs 22, 24 being glued to the inner wall of the second side wall 14 and the inner side wall 16, respectively F2).

In the next folding process according to FIG. 9, the bottom adhesive flap 62 is folded inwards around the bottom flap folding line 66 and glued to the inside of the inside wall 16 (adhesive surfaces dotted, arrow F3). As can be seen in FIG. 9, in this state, the bottom fold line 64 is arranged in the immediate vicinity of the upper edge of the support unit 20.

In the next step, as shown in FIG. 10, the bottom unit 60 is folded inward around the bottom folding line 64 (arrow F4).

In the next folding step according to FIG. 11, the lid adhesive flap 72 with lid unit 70 is folded inwards (downwards) around the lid adhesive flap fold line 76 (arrow F5). Subsequently, the lid unit 70 is folded up about the lid folding line 74 (see FIG. 12).

Referring to FIG. 13, the second support unit 50 is then folded inward about the first glue flap folding line 53 and the second glue flap folding line 55, the first glue flap 52 and the second glue flap 54 being bonded to the inner wall of the first side wall 12 (adhesive surfaces dotted, arrows F6 ).

Next, the inner side wall 16 is folded along the second side wall folding line 15 on the inside of the second side wall element 14 (see FIG. 14, arrow F7).

Subsequently, the first side wall 12 is folded around the first Seitenwandfaltlinie 13 on the inner side wall 16 and the second side wall 14 and bonded to the inner side wall 16 (adhesive surface shown hatched, arrow F8, see Fig. 15).

Thus, the flat folded transport state of the folding box 10 shown in FIG. 16 is achieved.

The complete unfolding of the folding box 10 at the filler takes place by exerting pressure (arrows D according to FIG. 16) on the first and second side wall folding lines 13 and 15, respectively.

In Fig. 17 is schematically shown in a perspective of the unfolded bottom portion of the carton 10. It can clearly be seen how the two support units 20 form inwardly folded support tabs 30, which serve as a support of the bottom unit 60. Thereby, the bottom unit 60 may be formed as a simple tab. In order to increase the carrying capacity, the floor unit may also be double-walled in an embodiment not shown. Due to the relatively high rigidity of the support strap 30 due to the reinforcing straps 38, the support straps 30 automatically fold inward during the unfolding operation of the folding box 10.

In FIGS. 18 and 19, the lid region of the unfolded folding box 10 is shown in a detailed perspective. The support unit 50 has a single-walled support tab 56, which remains nestled on the inner wall of the first side wall 12 due to their low rigidity when folding the carton. After the carton is filled, the lid unit 70 is folded inwardly about its lid fold line 74. This condition is shown in FIG.

In order to secure the lid unit against unintentional opening, the support tab 56 is unfolded into the interior of the folding box 10 (see FIG. 19). For better handling of the cover unit 70 when opening the hintergreifbare recess 78 is used.

Claims (15)

1. A folded box (10) having side walls (12, 14, 16) and a base unit (60) and/or a lid unit (70), at least one side wall (12, 14, 16) having a convex curvature when the folded box (10) is folded up,
   characterized in that

   - at least one supporting unit (20; 50) is connected to the inner wall of the convexly curved side wall (12, 14, 16) and has a first adhesive tab (22) and a second adhesive tab (24), which are connected to the inner wall and which are arranged spaced apart (A1; A2) from each other in the direction of the curvature, and

   - between the first and second adhesive tab (22, 24) there is a supporting tab (30; 56), which is connected to the first and, respectively, the second adhesive tab (22, 24) via a first and, respectively, a second supporting tab fold (32, 34), the length of the supporting tab (30; 56) corresponding to the distance (A1; A2) between the first and the second adhesive tabs (22, 24) and, when the folded box (10) is folded up, it being possible for the supporting tab (30; 56) to be folded into the interior of the folded box (10) or, when the folded box (10) is folded up, folding up automatically into the interior of the folded box (10).
2. The folded box as claimed in claim 1,
   characterized in that

   - a plurality of supporting units (20; 50) are arranged in the direction of the curvature.
3. The folded box as claimed in claim 1 and/or 2,
   characterized in that

   - the folded box (10) has two convexly curved side walls (14, 16) which, when folded up, are opposite each other, so that the result is an oval or round cross-sectional shape, and opposite supporting units (20) are arranged on the inside of the side walls (14, 16).
4. The folded box as claimed in one or more of the preceding claims, characterized in that

   - the supporting tab (30.1) has a convex curvature inward when folded up.
5. The folded box as claimed in one or more of the preceding claims 1 to 4, characterized in that

   - the supporting tab (30) has at least one further supporting tab fold (36), which runs parallel to the first and, respectively, the second supporting tab fold (32, 34) and, in particular, is arranged centrally on the supporting tab (30).
6. The folded box as claimed in one or more of the preceding claims, characterized in that

   - the supporting tab (30) is formed with double walls.
7. The folded box as claimed in one or more of the preceding claims, characterized in that

   - the supporting tab (30; 56) is arranged underneath the base unit (60) and/or above the lid unit (70).
8. The folded box as claimed in one or more of the preceding claims, characterized in that

   - the base unit (60) and/or the lid unit (70) is connected to the inner wall of a side wall element (14, 16) via a base fold (64) and a lid fold (74), respectively, the base fold (64) and lid fold (74) being arranged substantially at the same height as the upper and lower edge, respectively, of the folded-up supporting tab (30; 56).
9. The folded box as claimed in claim 8,
   characterized in that

   - between the base unit (60) and, respectively, the lid unit (70) there is a base adhesive tab (62) and, respectively, a lid adhesive tab (72), which are connected to the respective side wall (14, 16) via a base adhesive tab fold (66) and, respectively, a lid adhesive tab fold (76) and which are connected to the inside of the corresponding side wall (14, 16).
10. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the first and second adhesive tabs (22, 24) of the supporting unit (20) are integrally molded on the lower and/or upper front end edge of a side wall element (14, 16) via a first and, respectively, a second adhesive tab fold (26, 28) and there is a slot (44) between the side wall (14, 16) and supporting tab (30).
11. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the supporting tab (30) is reinforced by at least one reinforcing tab (38), which is connected to the supporting tab (30) via a reinforcing tab fold (40), which in particular runs parallel to the first and, respectively, the second adhesive tab fold (26, 28).
12. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the base unit (60) and/or the lid unit (70) have an external circumferential contour which corresponds substantially to the inner circumferential contour, formed by the curved side walls (12, 14, 16), of the folded box (10).
13. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the base unit and/or the lid unit are/is double-walled.
14. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the folded box (10) is composed of board or board-like material or plastics material.
15. The folded box as claimed in one or more of the preceding claims, characterized in that

    - the folded box (10) is formed from a one-piece blank.

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