NL1043199B1 - Leak-proof folding carton with lid - Google Patents

Abstract

A rectangular tray-shaped, leak-proof folding carton composed of a flat piece of cardboard with associated lid, to whose mirror three or four hinged sealing walls are connected along the longitudinal sides, which are connected to the side walls of the tray, characterized in that the sealing walls adhere when the lid is closed. the inside of the side walls of the shell and be connected to it by means of gluing or welding.

Description

| Title Leak-proof cardboard with lid Description Vochitig enol sheet of food is often packed in plastic packaging. Think of plastic thermoformed or injection-yeasted shawls with bonding lids. Synthetic packaging materials are made of non-sustainable raw materials and | are often not recyclable in such a way that they can be used again as a malesrial material for food packaging. | | Packaging based on paper ferment, for example] folding cloths have these | sustainability nadelan nist, | The sland der tachniek has recyclable kerian types that are moisture and fat residues. | There are also cardboard-based chess structures that are leak-proof. | Echier lskdicht cartorman trays with matt cardboard lids exist nist, With that is hat | Limited possible replacement of synthetic stollen packaging by paper-based: | packaging, | The invention described below is intended to provide for this missing | combination of leak-proof sohag! with lid based on paplervezsls, | Starting from the existing constructions at the folding cartornage to make a leak-proof rectangular shell of cardboard, a cardboard lid is connected to one of the four side walls of the trunk, an essential! hallmark of | The invention is that the lid connected to the tray is flat and therefore not in the | production process in a third dimension need be Ia, so a | relatively serval production process that only the lacquer-proof shell | followers who host state of the art in production, Daarmes is the | invention a construction that can be produced at low cost, | Figure 1 shows the flat appearance of a ring shape.

Lin 8 is the | hinge between lid and schagl.

To the left of line 8 is the part that covers the lid! | forms, rachis of the line © is the part that will form the shell, This wettest 9 part can also embody different leakproof structures for dishes than the one here | pictured preferred version. In essence, the spit gel of the lid (1} has the same dimensions as the opening of the bowl, so the mirror will fit exactly into the opening of the bowl.

In order to capture variation loops Linmen sizes of the opening and the matan of the mirror on 4) fe kumen, the mirror of that cover was provided on three or four of its sides with a hinged edge panel, praised hereafter: sealing edge {2}. Figures 1, 2 and 3 show which constructs need three sealing edges and waike needs four sealing edges.

By extending the side walls of the shell {4) above the hinge pin of the shell and lid (6), the sealing edges will lie against the inside of the shell walls during folding carton. elasticity of the free-range fins will make the sealing edges always in contact

2 | stick with the side walls, This will allow the opening of the shell along its side walls | be sigepoem, | In order to obtain a leak-proof connection between the directional walls and side walls | of the shell, these two can be done by means of welding techniques or bonding with each other | can be bonded, Hisrioe can glue or weldable coatings on the cardboard | applied, | In our preferred option, both sides of the sidirectional wall {2} die | Yjdon's closing come into contact with the side walls of the shell, they are also on the | tops of the side walls of the shell {7} with a klselshf mounted in | operating state adheres only to itself, | Since the joint between the sealing walls and side walls of the trestle! only 9 can be loaded on aschuking, a low hecnijngskrgcht of the adhesive is sufficient, DI lastsie stagt In the practice that the connection can be closed by hand and that no specie tools are needed to establish the bonding between the side wall and the sealing wall ie bring.

At the corners of the opening of the shell, inherent to the construction, it will also be possible to keep varying material leveling and manufacturing requirements always open for free. It is also possible to press the mirrors of the lid too deeply during the closing and thus to press the lid too deeply. deform, shore up again! effect hall, In order to avoid these holes and to make the shell and lid combination leak-tight, the sides of adjacent sealing walls are connected to each other by an essentially triangular piece of cardboard, called Hema: the sealing dnehosk 13}. See figure 2. The aldichiings trihaek is in the flat square a corner that is justified Between two adjacent sealing walls {2} that are delimited by the two fusion lines A and B.

When the lid is closed, the sealing turns are forced into the third dimension by the contact between the sealing wall and the side walls of the paper tray. 3} a fold line {3} that facilitates the formation of a three-ring lonal ulistoskeleton.

The three-dimensional sealing triangle sticks! beyond the outer serums of the mirror and dasrmes also uttered beyond the pin channels of the opening of the bowl, See figurars 3, 4, hen 8, Become the splegs! now slightly pressed, then the sealing elbow is pressed into the possibly remaining opening in the corner between the mirror and the opering of the shell.This guarantees a leak-tightness and also prevents the

In order to facilitate the closing of the lid in the birnenziids of the opening of the shell, in a preferred embodiment, the shell is not a block but a gigakotie cone with larger opening than the bottom.

With that, the lid will be dead

45 sealing walls with the closing and progressively smaller opening enter toluel the splegsi of the lid is equal to the opening of the shell.

This helps to prevent seepage with ds sealing drishosks and to restore leak-tight seals.

In Figures 5, a preferred embodiment of the Invention is shown with four sealing walls. The principles that guarantee the leak-tightness remain the same as those with three sealing walls, Figure 19 Figure 1 Flat projection Herein 1 is the spdegel of the cover, 2 con sealing shaft wall, 3 oan sealing drishosk, | 4 a side wall of the bowl, 5 sen sohamirine between cover wall and mirror, 8 sen zohamisrine between lid and squint and 7 tops of side walls.

Figure 2} Aldiching triangle, detail of cover | Here 3 is the all-sealing triangle, A an B virtual lines in the verisngde of da | connection of guide walls and transom that mark the sides of the sealing walls and the markers behind the sealing triangle le. | Mierin is 8 osn fold line dis the delamalis of the flat sealing edge angle {ot zen dristimensionals shape faciitesst, Figure 3 | Dre aklohingswendan, sifter of the deck | Marin is a 2-inch seal wall, 3-inch seal face in three-slice toastand #, and 4 a sidewall of the bowl. | Figure 4 Three sealing walls, closed condition | Higrin is 3 oen sldichingsanehoek In three-dimensional state, Figur 8; Vas sealingwarden, veil of the lid | Higrin is 2 s all sealing wall and 4 a side wall of the squint FourS î Vas lighting walls, geskmen tosatand In which is 3 sen aldichiingsdrishhoek In three-dimensional tosatand, 40

Claims (2)

4 | Conclusions 1. A rectangular shell-shaped folding cardboard made up of an ultra-flat piece of cardboard with accompanying gakset, to which splegetes are connected along the longitudinal sides of three or four sealing walls which are connected to the side walls of ds schagl, with the feature that the sealing walls are The lid can be placed on the inside of the side walls of the bowl and dayrmes are bonded there by means of gluing, whereby the gluing is done with the help of zen kissi material that contains algae! adhering and applied to both the inside of the side walls of the shell and to the side of the sealing values which are connected to the mirror of the lid and which are in engagement with the named side warder, 2. Package according to sun loop 1, in which adjacent sealing walls connected to the lid at the corners of the mirror of the lid are matically connected to each other by a structure which is In the flat plane In assention san triangle connecting the zip walls of the adjacent sealing walls with eikear and which when the lid is once in a three-dimensional structure with the sidewalls of the shell forming protrusions defining the vertices of the shell.