FI12176U1 - Leakproof and liquid-tight packaging box of corrugated board - Google Patents

Abstract

A leakage and liquid tight packing box one piece corrugated cardboard blank comprising a bottom surface (1), inner vertical surfaces (2) of the long sides of the box, inner vertical surfaces of a short side (7), and a long side (6) a bending line (17) such that the surfaces (2), (3), (6) and (7) form a fluid and leak-tight angular structure when mechanically assembled and bonded, characterized in that the packing box blank also comprises a torsionally rigid and rigid structure ; a curved line (13) between the short side vertical surface (3) and the corner surface (7) of the liquid and leak tight box, which is obliquely inclined inwardly of the vertical surface (3) with respect to the bending line (14) gluing flaps (4) on both sides, short side bending lines (21, 22) and a double bending beam structure (5) therebetween, and long side bending lines (23, 24) and a double bending beam structure (9) therefrom.

Description

The present invention relates to a one-piece blank for a leak-tight liquid-tight packing box according to the preamble of claim 1. The invention also relates to a corrugated leak and liquid tight packaging box according to claim 13, which is of high strength and stackable.

There are many different types of packaging known in the packaging industry, which have been developed for different needs. There are many aspects to consider when designing a package, including manufacturing, storing and using the package for both transport and storage. Packaging boxes, which must be liquid and leak proof, usually have angular structures as a problem. In addition, many packing boxes should be strong in structure and capable of carrying large weights. Especially in the food industry, there is a need for liquid and leak-proof packaging boxes, which must be stackable. Typically, topping and stacking leak-proof styrofoam or plastic leakage packing boxes have been used to store and transport fish and meat. Such packing boxes must withstand a load of at least 20 kg and the boxes are typically stacked 10 layers on top of each other. As a result, one of the major problems has been the structural rigidity of the packing box and its retention. Another problem with plastic solutions is their required storage space and disposal after use. Many packaging materials are non-renewable and not necessarily recyclable, so from an environmental point of view their use is not environmentally friendly.

Also known in the art are liquid-tight packaging made of corrugated board. One known solution is disclosed in PCT / FI2016 / 050662. The solution applies to mechanically or hand-formed, adhesive-free, liquid and leakproof, corrugated, corrugated and corrugated packaging on the outside. Another solution is disclosed in the utility model Fl 10658. In this publication, a corner-beam solution is known per se. The structure has a sealing corner with integrated cover flaps so that the end stacking levels lock into the counter-grooves at the top of the sealing corners. The weakness of the structure is the insecurity of the locking under stress. The flap between the stacking planes does not have enough friction and the necessary locking to bind the structure, this is particularly emphasized in slippery PET coated corrugated board. The corner tends to loosen when assembled because there are several layers of cardboard at the end. Because of this structure, they act like a spring in a corner, trying to push the box outward from the corners. Due to the lack of proper locking of the flaps between the stacking planes, this results in a corner bulging and even opening of the structure under stress. One of the major problems with corrugated box corner boxes with corner beams has been that, with heavy box weights, the end of the box bulges outward, as a result of which the stacked box tends to sink into the box below. In some dense corner solutions, the long sides are locked with cardboard pairs between the end folds. However, the solution does not provide a sufficiently tight lock on the long sides and the result is that the loose structure reduces the load capacity.

Fluid-tight top-sealed corrugated board solutions have also been better used for storing and transporting liquid foods, with separate top stacking levels, which are often wide and complicate packaging. The object of the present invention is to provide a solution which avoids the disadvantages of the prior art. The structure of the package according to the invention remains completely liquid-tight even when packaged heavily. In addition, the package retains its shape substantially unchanged, although several layers are stacked on top of it. More specifically, the invention is characterized by what is stated in the claims.

In the following, the invention will be explained in more detail by way of example with reference to the accompanying drawings in which

Fig. 1 shows a blank according to the invention, Fig. 2 shows a partially assembled box according to the invention, Fig. 3 shows a packing box according to the invention, Fig. 4 shows the end of the packaging box assembled,

The invention relates to a machine-glued liquid and leak-proof packaging box such that the package is a one-piece corrugated packaging box.

The corrugated board used in the invention is conventional double or triple board depending on the application. If the material is required to have special properties to prevent penetration of, for example, grease, water vapor and gas, the corrugated board is plastic coated or alternatively the plastic film is laminated between the paper layers. The plastic acts as a barrier material so that the packing box is not only leakproof and liquid tight, but also material. Commonly used plastics in corrugated board include polyethylene, polyester and polypropylene.

The prior art is described in PCT / FI2016 / 050662. This solution is primarily intended for lighter loads, so no glue is needed to assemble it. Due to the mechanical gluing structure, the solution according to the invention withstands much greater load than the solution according to the prior art. Technically, there are substantial differences in the invention, for example, the corner surfaces for providing a sealing corner come outside the short side of the packing box. Large gluing flaps are formed at the end, which are folded to the far side during the gluing step. In this way, the structure is strong and torsionally rigid. The invention has an extremely strong beam structure formed on all sides by double bending, which further stiffens the structure. Thanks to the solution, the invention does not require traditional stacking levels, but the shoulder forming the beam structure performs the same function. Compared to the traditional solution, they are narrower and do not interfere with packaging or unpacking. It is also essential that the solution according to the invention is capable of adding, if necessary, the stacking nails and their counter apertures so that the packing box remains in place when stacked on top of each other. In addition, the new design of the liquid and leak-proof packing box end of the invention allows for a so-called normal carrying handle. Corresponding handling nails or carrying handle cannot be formed in prior art liquid and leak-proof packing boxes.

1 and 2, the box blank according to the invention has a bottom surface 1 and bending surfaces 2,3,4,5,6,7,8,9,11,12. More specifically, the bending surfaces are: long side inner vertical surface 2, short side inner vertical surface 3, short side outer vertical surface 8, and short side gluing flap 4. Short side double-curved shoulders folded from the bend lines 21,22 form a rigid side structure 5. a side corner surface 7 providing a tight corner structure from the bending line 17. The long sides have dual shoulders, which are folded in the folding lines 23,24 to form the outer vertical surface 9 of the long sides of the rigid beam structure 11 and 12 are folded so that the vertical surface 11 forms a long side of the upper side and the vertical surface 12 between the lower side and the bending lines 16.

As shown in Figure 1, these bending surfaces provide a machine-formed packing box formed from a single die cut and formed by gluing, wherein the bending surfaces 2, 3, 6 and 7 form a fluid and leak-tight angular structure. 2 and 3, the long side corner surface 6 and the short side corner surface 7 are folded against the bending line 17 to provide a dense corner structure. It is essential in the invention that the short side corner surface 7 is folded onto the outside surface of the short side vertical surface 3, i.e. the outer surface of the packing box. In addition, it is important to the invention that the short side double-curved beam structure 5 is folded from the bend lines 21,22 together with the outer vertical surface 8 of the short side to the outside surface of the short end surface 3, i.e. the outer surface of the packing box. Specifically, the vertical surface 8 is folded against the outer surface of surface 3 and fixed to the surface of the sealing corner 6. The double-curved beam structure 5 ensures that the long side corner surface 6 and the short side corner surface 7 have at least the required space thickness. In this way, the corner surfaces 6, 7 fit snugly between the surfaces 3 and 8 without crushing the cellular structure of the corrugated board.

Of great importance for the invention are the sizing flaps 4 which are bent against the outer surface of the long side surfaces 2 to which they are glued. This ensures the torsional stiffness of the box corners in all situations. The long side double-curved shoulders forming the beam structure 9 are then folded out of the bending lines 23, 24 outside the box with the outer vertical surface 11 and 12 of the long side so that the sizing flap 4 is between the inner vertical surface 2 and the outer vertical surface 11 and 12. The gluing of the long side surfaces 11 and 12 against the gluing flaps 4 makes the structure straight. The bending line 16 between the surface 11 and 12 facilitates gluing and influences the straightness of the long side, providing additional stiffening. The double-curved beam structure 9 ensures that the gluing flap 4 has at least the space required for the material thickness of the gluing flap 4. In this way, the sizing flap 4 fits snugly between the surfaces 2,11 and 12 without crushing the corrugated cellular structure. Thanks to the double-bent beam structure 9, bonding of the outer surfaces 11 and 12 of the long sides to the gluing flaps 4 ensures a very rigid long side. The double folds outside the packing box enable the box to form a stiff beam structure 9 and 5 on all sides, which also prevents the pages from swelling under stress. 3 and 4, the advantage of the double-bent beam structure 9 and 5 is the air space 26 formed between the walls 2, 3 and 8, 11, 12, which improves the insulation of the box and acts as a buffer. The beam structure 9, 5 allows the boxes to be stacked securely on top of each other.

As shown in Figure 3, the shoulder formed by the double bending of the bending lines 21, 22, 23, 24, which form the beam structure 5 and 9, are very strong in the finished packing box. In this way, prior art separate top-stacking tops are not required and, when suitably wide, they also allow easy filling of the box. In other words, due to the double folds 21, 22, 23, 24 which fold out of the box, the box forms a rigid beam structure 9 and 5 on all sides, which also prevents the pages from swelling under stress. The advantage of the double-curved beam 9 and 5 is the air space formed between the walls 2,3 and 8,11,12, which improves the insulation of the box. The bar allows the boxes to be stacked securely on top of each other.

Thanks to the bending line 13, the long sides 2 together with the sealing corner structure 6, 7 and the gluing flaps 4 are inwardly conical. In other words, the inside top of the long side 2 is curved towards the inside of the packing box. The cone structure is provided by forming an oblique bending line 13 with respect to the bending line 14 between the bottom surface 1 and the long side 2, in particular so that the bending line 13 is obliquely inwardly vertical to the vertical side 3 of the short side. In this way, the inner bending line 15 of the short side end 3 nearer to the bottom surface 1 of the blank is longer than the outer bending line 21 of the end 3. The bending line 21 is the same as the bottom surface 1 of the double bending lines 21, 22. an oblique bending line 13 is formed between the end point 18 of the inner bending line 15 and the end point 19 of the outer bending line 21 of the end 3. The angle A between the inner bending line 15 and the oblique bending line 13 is less than 90 °.

According to Figure 1, the angle B between the long side 2 and the long side corner surface 6 is 90 °. As shown in Figure 4, viewed from the end of the packing box, the long sides 11, 12 of the outside of the finished packing box are at 18 and 25 at a right angle of 90 degrees. The outwardly curved double bending bending lines 23, 24 form a beam structure 9 at an angle of 90 degrees with the sides 11 and 12. Due to the rectangularity of the plurality of packing boxes, there will be no backlash when stacked.

However, the inner cone structure formed by the bending line 13 of the packing box is particularly important. 4, viewed from the end of the packing box according to items 18 and 19, the finished packing box is tapered inwardly inwardly inwardly. According to Figure 1, with the bending line 13 inclined relative to the bending 14, the inner vertical surface 2 of the long sides is curved inwardly in the range of 1-5 ° to form a packing box by forming a bending line 13 of bending angle A and angle B.

In one exemplary embodiment, the angle A is 86.3 °, thus in the exemplary embodiment, the inside cone angle of the finished packing box is 3.7 °, typically the angle is in the range 1-5 °. In this way, the inner cone structure acts as a structural buffer, leaving airspace 26 . It is essential that this avoids the bulging out of the side of the packing box, which makes it safe to stack the boxes on top of each other.

In accordance with Figure 5, in addition to the foregoing, the leakage and liquid sealing box according to the invention is formed with stacking nails 28 and counter-openings 27 to which the stacking nails 28 are locked. More specifically, the stacking claws 28 are formed in the beam structure 9 such that they are cut from one long side 28.2 and from both short sides 28.3, 28.4 and, if necessary, folded up from another long side 28.1 to form a vertical bracket. The counter-openings 27 are formed on the lower vertical surface 12 of the long side and on the gluing flap 4 with cut-outs corresponding to the stacking claws 28. In a pre-assembled leak and liquid-tight packaging box, the function of the stacking nails 28 is to ensure that the boxes remain on top of each other and in place. The stacking nail 28 on the top surface of the box below is inserted into a hole in the counter opening 27 at the bottom of the box above. It is novel in the structure according to the invention that the inside of the box remains completely leaky even if stacking nails 28 are added to the structure.

It is also essential for the invention to carry the opening 10 of the packing box end having flaps 10.1. The carrying opening 10 is formed from the surface 8 of the end, the flap 10.1 is folded against the packing box while the double bending line 21, 22 and the beam structure 5 allow space for fingers when lifting the box. Leakage and fluid tight packing boxes have not previously been able to form such openings. Carrying openings are very important for safe handling of the heavy packing box and stacking on top of each other. Thus, the solution of the invention incorporates a number of novel and inventive features that are not apparent in the prior art solutions.

It will be apparent to one skilled in the art that the invention is not limited to the above embodiments, but may be varied within the scope of the appended claims.

Claims (11)

PROTECTION REQUIREMENTS 1. If you are a fan, please use the förpackningslåda whistleblower (1), in the vertical ytor (2) på lådans långa sidor, inre the vertical ytor (3) på de korta sidorna, en hörnyta (7) på en hörnkonstruktion på de korta sidorna, en hörnyta (6) på de långa sidorna och en vik-linje (17) däremellan så, att ytorna (2), (3), (6) och (7) bildar en vätske-och läckagetät hörnkonstruktion efter att blivit hopsatta maskinellt och medelst limning, kännetecknat av att ämnet för förpackningslådan för att åstadkomma en vridstyv och stadig constructions dessutom har -en denan vertical (7) och hårstån (7) sida gjord viklinje (13) som sett från bottenytan (1) i förhållande till en viklinje (14) sned inåt mot den vertical ytan (3), -en yttre vertical (8) på de korta sidorna och limningsklaffar (4) på dess båda sidor, -viklinjer (21, 22) på de korta sidorna och en balkkonstruction (5) for att dub-belböjas däremellan samt viklinjer (23, 24) på de långa sidorna och en Balkkonstruktion (9) for att dub-belböjas däremellan. A leakage and liquid tight packing box one piece corrugated cardboard blank comprising a bottom surface (1), inner vertical surfaces (2) of the long sides of the box, (3) short side, (7), long side (6), and a bending line (17) therebetween such that the surfaces (2), (3), (6) and (7) form a fluid and leak-tight angular structure, mechanically assembled and aided by gluing, characterized in that to provide a torsionally rigid and strong structure the packaging box blank also comprises; a curved line (13) between the short side vertical surface (3) and the corner surface (7) of the liquid and leak-proof box, inclined inwardly with the vertical surface (3) with respect to the bending line (14), 8) with gluing flaps (4) on both sides, - short side bending lines (21, 22) and between them the double bending beam structure (5) and the long side bending lines (23, 24) and between them the double bending beam structure (9), 2. Anyone who sticks out a förpackningslåda enligt skyddskrav 1, a turnbuckle av att den inre viklinjen (15) för ränden (3) av de korta sidorna flicker ligger närmare bottenytan (1) har en större längd ändän (21) för aänden, varvid den sneda viklinjen (13) or gjord mellan den inre viklinjens (15) anchor point (18) och den yttre viklinjens (21) anchor point (19). Leak and liquid-tight packing box blank according to claim 1, characterized in that the inner bending line (15) of the short side end (3) closer to the bottom surface (1) is longer than the outer bending line (21) of the end (3). an oblique bending line (13) is formed between the end point (18) of the bending line (15) and the end point (19) of the outer bending line (21) 3. The stethoscope for folding in and out of the box 2, the folding box in the visor (15) and the folding in the visor (13) up to 90 °, företrädesvis inom området 89 ° -85 °, och tipseln B lantern tie (2) and lantern (6) lantern tie 90 °. Leak and liquid-tight packing box blank according to protection claim 2, characterized in that the angle A between the inner bending line (15) and the oblique bending line (13) is less than 90 °, most preferably between 89 ° -85 ° and the long side (2) the angle B between the long side corner surface (6) is 90 °. 4. The following paragraph (11), (12) på de långa sidorna, den vertikala ytan (11) bildar en övre sida långa sidorna och den vertikala ytan (12) bildar en nedre sida, och det finns en vik-linje (16) däremellan. 4. leakage and fluid-tight as claimed protection in claim 1 the packing box one-piece blank, characterized in that the blank comprises an outer vertical surface of the long sides (11), (12), a vertical surface (11) forming the upper side and the vertical surface (12) of the long side between the lower side and is bending line (16). 5. I am stuck to stopping the staples (28) and stopping the staples (28) and stapling the staples (28) and stopping the staples (28). (28) g bjj bal bal bal bal bal bal bal (bal ((((9 (9 9 (9) b bildildild snittittitt 9 p p på pååååå (28 ((((((((28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 28 27 28 28 27 27 28 27 27 27 27 27 28 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 27 ((27 27 27 27 27 27 den långa sidans nedre vertikala yta (12) och limningsklaffen (4) genomic image urtag motsvarande staplingsklorna (28) däri. Leak and liquid-tight packing box blank according to claim 1, characterized in that the blank comprises stacking nails (28) and counter-openings (27) thereon to which the stacking nails (28) are locked so that the stacking nails (28) are formed in the beam structure (9). ) forming cuts on one long side (28.2) and on both short sides (28.3, 28.4) and, if necessary, on the other long side (28.1) of the bending line, counter-openings (27) are formed on the lower vertical surface (12) and gluing flap (4); that the notches corresponding to the stacking claws (28) are cut in them. 6. The first step in the operation of the invention (10) is the medication (10.1) and the cider sidornas (8). A leakage and liquid-tight packing box blank according to claim 1, characterized in that the blank comprises carrier openings (10) formed on the short side surface (8) with flaps (10.1). 7. The lacquer-and-lance förpackningslåda i wellpapp som är hopsatt maskinellt medelst limning så, att det med hjälp av vertical ytor (2), (3) och hörnytor (6, 7) samt en viklinje (17) mellan horntower (6, 7) har skapats en vätske- och läckagetät hörnkonstruktion, kännetecknad av att den läckage-och Vätsketä förpackningslådan, som är stadig, vridstyv och staplingsbar till sin construction, består av - hörnytan (6, 17) som är vikt läng som är böjd och limmad mot den yttre ytan av den inre vertical ytan (3) på de korta sidorna, - en inåtriktad konisk construction bestående av den inre vertical ytan (2) på lådans långa sidor, -limningsklaffar (4) i båda ändar den yttre vertical ytan (8) som y böjda och limmade mot de långa sidornas inte vertical ytor (2), - viklinjer (21, 22) på de korta sidorna och en balkkonstruktion (5) för att dubbelböjas däremellan, samt viklinjer (23, 24) på de långa sidorna och en balkko nstruktion (9) för att dubbojojas däremellan så, att det blir en styv lasttålig balkkonstruktion (5) och (9) på förpackningslådans alla sidor. 7. Corrugated leak and liquid tight packaging box assembled mechanically by means of gluing by means of a bending line (17) between the vertical surfaces (2), (3) and the corner surfaces (6, 7) and the corner surfaces (6, 7). a fluid and leak-tight corner structure formed, characterized in that the leak-tight and liquid-tight packing box is composed of a rigid, torsionally rigid and stackable structure; - a folded corner surface (6, 7) folded and glued to the outer surface of the short side inner vertical surface (3), - a longitudinal inner side surface (2) of the drawer having an inwardly formed conical structure, gluing flaps (4) folded and glued against the inner vertical stacks (2) of the long sides, - short side bending lines (21, 22) and a double bending beam structure (5) therebetween and long side bending lines (23, 24) and between them a double-curved beam structure (9) such that a stiff load-bearing beam structure (5) and (9) are formed on all sides of the packing box. 8. Vridstyv läckage- och vätsketät förpackningslåda enligt skyddskrav 7, kännetecknad av att en sned viklinje (13) vrch den den övre delen av den vertical (2) på sidorna ligger snett mot förpackningslådans inre så, att de vert. ) tillsammans med hammer tower (6, 7) and limningsklaffarna (4) är koner inåt. Torsionally rigid leakage and liquid tight packing box according to protection claim 7, characterized in that, by means of the oblique bending line (13), the top of the side vertical surface (2) is obliquely facing the inner part of the packaging box. ) and with sizing flaps 4 are inwardly conical. 9. Vridstyv läckage- och vätsketät förpackningslåda enligt skyddskrav 7, kännetecknad av att den med hjälp av dubbelböjningens utåtböjda viklinjer (23, 24) skapade balkkonstruktionen (9) står i 90 graders vertelik talaammans med. de långa sidorna. Torsionally rigid leakage and liquid tight packing box according to claim 7, characterized in that the beam structure (9) formed by the double bending bending lines (23, 24) is at a 90 degree angle along the long side vertical surfaces (11) and (12). with. 10. Vridstyv läckage- och vätsketät förpackningslåda enligt skyddskrav 7, kännetecknad av att på balkkonstruktionenen (9) and gjorda staplingsklor (28) och i den nedre vertikala ytan (12) på de långa sidorna och limningsklaff (12) för dessa genomic image sktra urtag motsvarande staplingsklorna (28) däri. Torsional rigid leakage and liquid tight packaging box according to protection claim 7, characterized in that the beam structure (9) is formed with stacking nails (28) and counter-openings (27) thereon on the lower vertical surface (12) of the long side and the gluing flap (4). that the notches corresponding to the stacking claws (28) are cut in them. 11. Torsionally rigid leakage and liquid tight packing box according to claim 7, characterized in that the short sides (8) are provided with openings (10) having flaps (10.1). SKYDDSKRAV 11. Vridstyv läckage- och vätsketät förpackningslåda enligt skyddskrav 7, kännetecknad av att i de korta sidornas yta (8) or gjorda bäröppningar (10) med klaffar (10.1).