CH403623A - Container - Google Patents

Description

Container The present invention relates to a container and more particularly to a container commonly used to contain food of various kinds, such as frozen food, frozen food or other semi-liquid or solid products.

These containers are generally made of relatively thin pieces of cardboard. However, it is also possible to use sheets of other materials such as aluminum, tin, plastic, or laminated sheets comprising layers of aluminum and paper or of paper and plastic. .

To make these containers, we start from a flat sheet that is cut and folded to form the walls of the container. During assembly, certain elements of the sheet are brought into contact with each other and glued together to make the container rigid. When the container is polyhedral in shape, it is important to reinforce the corners to prevent any leakage.

The object of the present invention is to provide a container whose corners are reinforced.

In general, the starting sheet used to manufacture the container is covered on one side with a protective layer of thermoplastic material which closes the pores of the base material and which prevents the liquid from penetrating into this material by capillarity.

This protective layer also constitutes an adhesive which maintains the parts of the container in the required position, which closes it from to to, con tight and which protects its contents against the risks of contamination.

The present invention also aims to improve the erobic effect of such a coating and to use the adhesive properties of thermoplastic materials to improve the production of containers with reinforced angles.

The accompanying drawing shows, by way of example, one embodiment of the container according to the invention.

fig. 1 is. a plan view of a sheet cut to the shape of the container.

fig. 2, a partial plan view of a variant of the sheet of FIG. 1.

fig. 3, a partial schematic view of an apparatus used for folding the container.

fig. 4, a larger scale sectional view. e along line 4-4 of fig. 3.

fig. 5, a perspective view of the container ready to be filled.

fig. 6, a partial perspective view of the filled and shaped container.

fig. 7, a partial sectional view on a larger scale along line 7-7 of FIG. 5.

fig. 8, a partial sectional view along line 8-8 of FIG. 5, and fig. 9, a partial cross-sectional view in the direction indicated by the arrows 9-9 in FIG. 5.

The container which will be described by way of example is rectangular in shape and shallow as seen in FIG. 5. It comprises a bottom 10, front and rear side walls 11 and 12, end side walls 13 and 14 and a cover 15 hinged to the rear wall 12. The interior corners 16 and 17 have polyhedral reinforcements and, in this cases, tdedriques.

The initial leaf is dormant. t constitutes the container of FIG. 5 is cut to the shape shown in FIG. 1. Fold lines determine the bottom 10 of rectangular shape, panels 11 and 12 will be separated from the bottom by lines 18 and 19, panels 13 and 14 separated from the bottom 10 by lines 20 and 21, the lid 15 separated from the panel 12 by a line 22 and a closure tab 23 which borders the end side 24 of the cover 15. Along the end edges of the panels 13 and 14 extend elastic flanges comprising a portion bottom and a part 26 folded upwards.

The reinforced corner construction of the described container is visible at corner 16 which will be described. in detail below. This angle is identical to angles 17, 27 and 28 which will therefore not be described in more detail.

To form the triangular angle 16, the starting sheet is contoured such that the adjacent edges 18 and 21 of the bottom 10 intersect at the angle 16 and form two of the three edges of the desired triangular structure. The third edge is defined by the edges 29 and 30 of the side panels 13 and 14 which are brought into contact with each other when the container is folded. The reinforcement of this angle is achieved by means of an element which forms an integral part of the starting piece and which is interposed between the panels 11 and 14. This reinforcement element comprises two flanks 31 and 32. The flank 31 is connected to the panel 11 by the edge 29 while the side 32 is connected to the panel 14 along the edge 30. The two sides are articulated one on the other along the edge 33 which is extends obliquely from angle 16.

The flanks 31 and 32 can be of different shapes. However, it is preferable that the external Nanc (in this case the sidewall 31) extends over the entire length of the edge 29. In FIG. 1, the two flanks have this characteristic and it is seen that the flank 32 extends over the entire length of Farete 30. However, in FIG. 2, the flank 31a is identical to the Nanc 31 of the Sg. 1, while the sidewall 32a has been considerably shortened and is only connected to the panel 14a along a portion 30b of the edge of this panel.

It will be noted that the flank 32 of FIG. 1 extends under the flank 31 when the rocipient is mounted and this flank is much narrower than the flank 31. 11 is the same, moreover, for Sanos 31a and 32a of FIG. 2. 11 results in the exterior Sanc 31 forming a projection which, when the. container is mounted, extends beyond the free edge of inner sidewall 32, and can be secured by adhesive directly to panel 14 which extends immediately below, as seen in FIG. 7.

Any device can be used to convert the initial sheet! of fig. 1, in a carton mounts. For example, fig. 3 shows a matrix 34 which cooperates with a punch 35 mounted on a rod 36. The punch consedepdacedanslamatrice in the direction indicated by Seche. The lower face of the punch 35 has a teile shape that dle presses exactly against. the bottom 10 of the sheet. A movable counterpart 37 with the punch 35 is located under the bottom 10. As the punch moves the container blank downwards, the side walls 11, 12, 13 and 14 are folded upwards as shown. dry 41. When the adjacent edges 29 and 30 of each corner of the container came into contact, the reinforcing elements. anglesontplies each along line 33, and brought to cover the walls 13 and 14. To facilitate folding, the fold lines are fo. rms in the room. starting in such a way that the parts of the container which fold during the implementation of the punch 35 do so in the desired direction. tAn minus one of the faces of the part; of cardboard represented in fig. 1 is covered with a layer of thermoplastic material such as polyethylene, vinyl or another plastic material, this covered face ultimately being inside the container. This layer of plastic material is represented on an exaggerated scale at 40 in FIGS. 7 and 8. Punch 35 and die 34, or c. he two elements are heated in such a way that when the panels of the container are brought into contact under the action of the pressure exerted by the punch on the die, the protective layer softens and exerts an adhesive action on the sides reinforcement. These are then glued together as seen at 38 in FIG. 8 and are bonded to the container wall as seen at 39 in FIG. 7. The three layers of material that constitute the two sidewalls and the underlying panel are pressed together so as to be compressed and repeated to a thickness of two layers as seen in FIG. 7.

Finally, the upper edge of the panel 14 is welded to the edge of the panel 11 over its entire height by means of the layer of material, plastic 40. As a result, the container thus manufactured has reinforced and perfectly sealed angles, these angles being completely covered in all their zones, critical by a continuous layer 40. In, no point there. there is a rough cut edge in the original piece of cardboard and protruding inside the container. So that any risk of gradual impregnation of the cardboard sheet remains.

We see in fig. 5 that, as the reinforcing elements extend over the entire height of the panel 14, these reinforcing elements provide rigidity dos.anglesdurecipient.11en resultsque containers once filled can be stacked on each other without danger of crushing.

The tight closure of the cover 15 and the tab 23 on l. he edges int: ernes 26 and on the front wall 11 can be carried out in all usual ways. These closing operations are unrelated to the reinforced construction of the corners of the container.

CLAIM Cardboard container of polyhedral shape consisting of a cut and folded sheet having several angles defined by a bottom and at least two side panels, characterized in that the said sheet comprises an element for reinforcing the angles extending between the said panels, this element of reinforcement comprising two sides each connected to one of the panelsRTI ID=2.158 HE=

**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.

Claims (4)

**WARNUNG** Anfang CLMS Feld konnte Ende DESC uberlappen **. and a closure tab 23 which borders the end side 24 of the lid 15. Along the end edges of the panels 13 and 14 extend elastic flanges comprising a downwardly folded portion 25 and an upwardly folded portion 26. high. The reinforced corner construction of the described container is visible at corner 16 which will be described. in detail below. This angle is identical to angles 17, 27 and 28 which will therefore not be described in more detail. To form the triangular angle 16, the starting sheet is contoured such that the adjacent edges 18 and 21 of the bottom 10 intersect at the angle 16 and form two of the three edges of the desired triangular structure. The third edge is defined by the edges 29 and 30 of the side panels 13 and 14 which are brought into contact with each other when the container is folded. The reinforcement of this angle is achieved by means of an element which forms an integral part of the starting piece and which is interposed between the panels 11 and 14. This reinforcement element comprises two flanks 31 and 32. The flank 31 is connected to the panel 11 by the edge 29 while the side 32 is connected to the panel 14 along the edge 30. The two sides are articulated one on the other along the edge 33 which is extends obliquely from angle 16. The flanks 31 and 32 can be of different shapes. However, it is preferable that the external Nanc (in this case the sidewall 31) extends over the entire length of the edge 29. In FIG. 1, the two flanks have this characteristic and it is seen that the flank 32 extends over the entire length of Farete 30. However, in FIG. 2, the flank 31a is identical to the Nanc 31 of the Sg. 1, while the sidewall 32a has been considerably shortened and is only connected to the panel 14a along a portion 30b of the edge of this panel. It will be noted that the flank 32 of FIG. 1 extends under the flank 31 when the rocipient is mounted and this flank is much narrower than the flank 31. 11 is the same, moreover, for Sanos 31a and 32a of FIG. 2. 11 results in the exterior Sanc 31 forming a projection which, when the. container is mounted, extends beyond the free edge of inner sidewall 32, and can be secured by adhesive directly to panel 14 which extends immediately below, as seen in FIG. 7. Any device can be used to convert the initial sheet! of fig. 1, in a carton mounts. For example, fig. 3 shows a matrix 34 which cooperates with a punch 35 mounted on a rod 36. The punch consedepdacedanslamatrice in the direction indicated by Seche. The lower face of the punch 35 has a teile shape that dle presses exactly against. the bottom 10 of the sheet. A movable counterpart 37 with the punch 35 is located under the bottom 10. As the punch moves the container blank downwards, the side walls 11, 12, 13 and 14 are folded upwards as shown. dry 41. When the adjacent edges 29 and 30 of each corner of the container came into contact, the reinforcing elements. anglesontplies each along line 33, and brought to cover the walls 13 and 14. To facilitate folding, the fold lines are fo. rms in the room. starting in such a way that the parts of the container which fold during the implementation of the punch 35 do so in the desired direction. tAn minus one of the faces of the part; of cardboard represented in fig. 1 is covered with a layer of thermoplastic material such as polyethylene, vinyl or another plastic material, this covered face ultimately being inside the container. This layer of plastic material is represented on an exaggerated scale at 40 in FIGS. 7 and 8. Punch 35 and die 34, or c. he two elements are heated in such a way that when the panels of the container are brought into contact under the action of the pressure exerted by the punch on the die, the protective layer softens and exerts an adhesive action on the sides reinforcement. These are then glued together as seen at 38 in FIG. 8 and are bonded to the container wall as seen at 39 in FIG. 7. The three layers of material that constitute the two sidewalls and the underlying panel are pressed together so as to be compressed and repeated to a thickness of two layers as seen in FIG. 7. Finally, the upper edge of the panel 14 is welded to the edge of the panel 11 over its entire height by means of the layer of material, plastic 40. As a result, the container thus manufactured has reinforced and perfectly sealed angles, these angles being completely covered in all their zones, critical by a continuous layer 40. In, no point there. there is a rough cut edge in the original piece of cardboard and protruding inside the container. So that any risk of gradual impregnation of the cardboard sheet remains. We see in fig. 5 that, as the reinforcing elements extend over the entire height of the panel 14, these reinforcing elements provide rigidity dos.anglesdurecipient.11en resultsque containers once filled can be stacked on each other without danger of crushing. The tight closure of the cover 15 and the tab 23 on l. he edges int: ernes 26 and on the front wall 11 can be carried out in all usual ways. These closing operations are unrelated to the reinforced construction of the corners of the container. CLAIM Cardboard container of polyhedral shape consisting of a cut and folded sheet having several angles defined by a bottom and at least two side panels, characterized in that the said sheet comprises an element for reinforcing the angles extending between the said panels, this element of reinforcement comprising two sides each connected to one of the RTI ID=2.158 HE=6 WI=12 LX=1150 LY=2661>side panels by a ridge and connected to each other by a **WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**. **WARNUNG** Anfang CLMS Feld konnte Ende DESC uberlappen **. 6 WI=12 LX=1150 LY=2661>lateral by an edge and connected to each other by another edge, these three edges converging at the said angle, and in that the internal face of the said sheet is covered of a layer of thermoplastic protective material also covered said reinforcing elements, the latter being glued by means of said thermoplastic material against one of the side panels. SUB-CLAIMS 1. Container according to claim, characterized in that the outer flank of the reinforcing element is glued to one of the panels while the inner flank is covered by the outer flank] '. 2. Container according to the claim, characterized in that each elem. Reinforcement ent comprises a relatively narrow sidewall covered by a second sidewall and held in place by it. 3. Container, according to claim, of 1st rec tangulaice, characterized in that the reinforcing elements of the two angles adjacent to each small lateral side of the container are folded down and sewn against the corresponding small side. 4. Container according to rovendication, caractense in that the inner side Ide each reinforcing element is connected to the adjacent side by a. edge shorter than that which connects the outer side to the adjacent other side.