FR2517280A1 - DOUBLE-FLAT FLAT CONTAINER, PROCESS FOR PRODUCING THE SAME, AND APPLICATION THEREOF - Google Patents

Abstract

THE BOTTOM OF THE CONTAINER IS SHAPED BY A PAIR OF SQUARE LEGS 4, 5, WHICH EXTEND DOWN THE TWO WALLS 19, 20 OF THE CONTAINER ON HALF OF THE LOWER EDGE OF THESE WALLS, THESE LEGS, WHICH WERE INITIALLY OPPOSITE. SCREWS, BEING CONNECTED, EACH BY ITS FREE LOWER EDGE D, B, HALF A, C WITHOUT AN EXTENSION OF THE LOWER EDGE OF THE OPPOSITE WALL OF THE CONTAINER, THIS CONTAINER BEING THUS PROVIDED WITH A DOUBLE FLAT SQUARE BASE, SHAPED BY THE TWO CROSSED LEGS, AND THE TWO LINES OF CONNECTING THE LEGS TO THE WALLS OF THE BAG BEING LOCATED ON THE SIDES OF THE RESULTING DOUBLE BOTTOM, ONE ON AN EDGE OF THE INSIDE BOTTOM AND THE OTHER ON AN EDGE OF THE OUTER BOTTOM, THESE TWO LINES OF CONNECTION HAVING AN END LOCATED AT THE SAME ANGLE OF THE SQUARE BOTTOM. APPLICATION TO CONTAINERS INTENDED FOR 100KG TO SEVERAL TONNES OF BULK MATERIAL, THE BOTTOM OF THE CONTAINER BEING STURDY AND NOT FRAGILE, AND IN PARTICULAR TO CONTAINERS WITH LIFT LOOPS AND FILL SLOT 3.

Description

The present invention relates to a container or flexible bag that can

  contain from 100 kg to several tonnes of

  bulk materials, including fluent materials,

  Slow or granular This bag may be made of polypropylene cloth, coated or not, or any other

  natural, artificial or synthetic woven fiber

  neur can be equipped with a waterproof inner bag, for example

polyethylene.

  Such a bag provided, because of its embodiment, a double flat bottom, which strengthens the strength of the bag, is known from the French patent application No. 2,356,569, filed June 27, 1977 However, given the embodiment of the bottom of the bag, the two seams forming this bottom

  axially cross it in two directions perpendicular to

  These fragile areas of seam support on the ground or on underlying bags, when the bags are full and there is a risk of damage by friction of these fragile areas

during handling of the bag.

  The object of the present invention is to remedy this drawback. For this purpose, it relates to a flexible container with a double flat bottom, intended for the packaging and transport of bulk materials and preferably provided with an inner bag in one waterproof material, characterized in that its bottom is formed by a pair of square legs (4, 5) which extend downwardly the two walls (19, 20) of the container on one half of the

  lower edge of these walls, these legs, which were initially

  are connected, each by its free lower edge (D, B) to the half (A, C) devoid of extension of the lower edge of the opposite wall of the container, this container being thus provided with a flat and square double bottom, formed by the two crossed legs, and the two connecting lines of the legs to the walls of the bag being located on the sides of the resulting double bottom, one (15) on an edge of the inner bottom and the (14) on an edge of the outer bottom, these two connecting lines

  having an end located at the same angle (16) of the square bottom.

  Thus, according to the present invention, the bottom of the container is no longer traversed in its middle by fragile junction lines, usually seams These junction lines or these seams are now located laterally on the bottom and, being -donné in addition the bottom of the container

  filled is generally slightly curved, these lines of

  seams do not rub on the ground or on the underlying bags. They are therefore protected and the -solidity

  double bottom container according to the invention is increased.

  Although said lines of connection are preferably

  In addition to seams, such as overlocking and stitching, they may also result from stapling or gluing, or any other known means for joining two free edges. Another object of the invention is a method of

  manufacture of such a container, from a piece of

  double-thickness material forming the two walls of the container This method is characterized in that by cutting in a lower angle of the two superimposed walls (19 and 20) a square of material whose side is equal to half of the width of the walls, so as to form, at the other lower angle of the two superimposed walls, two square legs (4,5), the side of which is equal to half the width of the walls, is removed, if If there is a lateral connection that may exist between the two legs, so that these two legs are free, the lateral edges of the two walls may be assembled above the legs (at 8 and 9), if these lateral edges are not not already connected, the free bottom edge (D) of the tab integral with one of the walls is connected to the lower edge (A) without a tab of the opposite wall, and the free bottom edge (B) is connected to

  the tab secured to the other wall at the lower edge (C)

  seen from paw of the wall opposite to this other wall, the two

  legs are thus folded one above the other, followed by

  two perpendicular directions, to form the double bottom, flat and square of the container, bottom whose width is equal to that of the legs, the two connecting lines (15 and 14) of the legs to the paroîs of the container being located on the sides of the resulting double bottom, one on an edge of the inner bottom and the other on an edge of the outer bottom, these two connecting lines having an end located at the same angle (16) of the

square background.

  Advantageously, after having removed by

  page a square of material of width equal to half of that of the walls, in a lower angle of the two superimposed walls, is split on a short length (at 6 and 7) the two superimposed walls (19 and 20), along their axis longitudinal and in the extension of the inner lateral edge of the tabs, in order to form, on the lower free edge and without tab of each of the two walls, a flap (C, A) of small width, on which a portion will be applied ( B, D) of the same small width of the free lower edge of the associated tab, to facilitate the connection then made between the lower free edge of this tab and the lower edge without tab of

the opposite wall of the container.

  The double thickness of material constituting the two superimposed walls can be obtained by means of two rectangular strips of material that is superimposed, or by means of a single strip (1) rectangular material, which is folded in two following its transverse or longitudinal median axis, or by means of a piece of cylindrical tube of material, that

  flattened for cutting generating said tabs.

  After the initial cutting giving birth to the legs and

  after the eventual formation of said bibs, it is necessary to

  between the two legs a side slot of a length equal to the side of the square legs, possibly extended by the width of said flap, to release the tabs from one another, when the two walls of the container are obtained at from a piece of flattened cylindrical tube of material, one end of which forms the jaws of the container and the other end of which forms the bottom of the container, in which case there is no connection to be made on the lateral edges of the container or when the two superimposed walls of the container result from the folding of a rectangular strip of material along the longitudinal median axis thereof and that said tabs are formed along this median axis, a connection to be made on a single side edges of the container in this case. The process according to the invention applies, in particular, to the case of flexible containers having at their top two lifting loops separated by a filling slot; this slot results from a notch formed in the middle of the top of the container, this vertex being closed on either side of this notch, either by means of connection, or because it is

  constituted by a fold of a strip of material forming the

  coach; when lifting loops, they result from a

  part of that median cleft and, secondly, that

  side edges of the two walls of the container are devoid of connection, from the top of the container, a distance

  approximately equal to the depth of the slot fill

  wise. The double bottom of the container according to the invention is not completely closed, since the edges of the side walls of the container and the edges of the square bottom are only connected along two sides thereof It results in a certain mobility of this bottom , which diminishes its fragility under

  charge, but such a bottom is not waterproof; this is all-

  Once without inconvenience, when the container comprises, as is generally the case, a sealed inner bag It is possible, however, if desired, to secure the side walls of the container and its bottom, along the other two

  sides of it, the bottom of the container then being complete.

closed.

  A particular form of execution of the container follows

  The invention will be described hereinafter by way of purely illustrative and in no way limiting example, with reference to the accompanying drawing in which FIG. 1 is a plan view of a strip of

  cut and unfolded material, from which the contents

neur will be manufactured.

  FIG. 2 is a perspective view of the same

  band of material folded along its transverse median axis.

  Figures 3 and 4 are two bottom views corresponding to

laying in Figure 2.

  Figures 5 to 7 are schematic views in elevation and partially in perspective illustrating the

making the bottom of the container.

  Figure 8 is a perspective view of the container

  finished, hanging on a crane hook.

  The container is made from a recess tape

  tangular fabric 1, for example poly-strips

  propylene, which has been folded according to its median transverse axis 2 (FIG. 2), which has been cut in the middle of the fold line 2 and perpendicular to it, to form a filling slot 3, and that the has been cut so as to form, in a lower angle of the folded strip 1, two opposite square tabs 4 and 5, whose side is equal to half the width of the strip 1, the two halves of the folded strip on itself representing the two walls (19 and 20) superimposed of the container The re-deployed container has the appearance shown in Figure 1 It was a little prolonged the cut, in 6 and 7, beyond the tabs 4 and 5, which forms, on the lower edges devoid of tabs of the two walls of the container, a flap of small width, respectively C and A (see Figures 1 and 2), on which

  will come to apply the lower edge of a paw, respectively

  The edge B of the leg 5 and the edge D of the leg 4, for forming the bottom of the container In FIGS. 2 to 4, the double arrows F1 and F 2 indicate the directions of F 2 bringing the flap A closer together and the edge D of the leg 4, one part and the flap C and the edge B of the leg 5

on the other hand.

  Before forming the bottom of the container, the lateral edges of the latter are closed, generally by seams, such as the combination of an overlock and a hook, these seams 8 and 9 being stopped at a certain distance from the edge. upper container formed in the fold line

  2, and this distance being approximately equal to the

  melter of the filling slot 3, for the purpose of forming, at the top of the container, two lifting loops 10 and 11

(see Figures 5 to 7).

  The bottom of the container is formed, generally also, by means of seams, although it is possible to resort to stapling or gluing. The edge D of the lug 4 is applied to the flap A, by a displacement along the arrow. double F 1, which gives rise to the fold line 17, and is secured, for example by seams 15, this edge and this flap which, in Figure 5, is hidden behind the flap C.

  The container then has the appearance shown in Figure 6.

  A longitudinal and median fold line was formed on each of the two walls of the container, between the bottom of the filling slot 3 and the inner edge of the flaps A and C, these fold lines being encrypted 12, for that which is visible on the drawing, and 13 for that located on the hidden wall (20) of the container, which has taken a generally parallelepipedal shape is then applied to the edge B lapatte 5 on the flap C, by a displacement along the double arrow F. which gives rise to the fold line 18, and secures this edge and this flap, for example by seams 14 The seams 15 of the edge D and the flap A are only visible in dotted line in FIG. drawing, which shows in perspective the finished container and suspended by its lifting loops 10 and 11 on the hook

of a crane.

  The connecting lines of the double bottom to the walls of the container are the seams 15 for the inner bottom and the seams 14 for the outer bottom, these two lines of

  link joining at an angle 16 of the realized square bottom.

  The sides 17 and 18 of the bottom are not closed, but they can be, also by seams, if necessary, for example in the absence of use of an internal sealed bag. We see in Figures 6 and 7 that the square bottom

  obtained can take a slightly convex shape towards the outside.

  especially when the container is loaded, and that, as a result, the bottom formation seams 14 and 15 are not in contact with the ground, and especially the seams 14, which

  are those of the outer bottom of the double bottom.

  Modifications of the detail of the field of equiva-

  Slow techniques can be made to the container described above, without departing from the scope of the invention.

17280

Claims (5)

  1 Flat double-bottomed flexible container, intended for the packing and transport of bulk materials and equipped with   preferably an inner bag made of a waterproof material, characterized   rised in that its bottom is formed by a pair of square legs (4, 5), which extend downwardly the two walls (19, 20) of the container on a half of the lower edge of these walls, these legs, which were initially facing each other, being connected, each by its free lower edge (D, B) to the half (A, C) devoid of extension of the lower edge of the opposite wall of the container, this container thus being   with a flat, square double bottom formed by the two legs.   crossed and the two connecting lines of the legs to the walls of the bag being located on the sides of the resulting double bottom, one (15) on an edge of the inner bottom and the other (14) on an edge of the outer bottom, these two lines of connection   having an end located at the same angle (16) of the square bottom.   Process for the production of the double-bottomed flat flexible container according to Claim 1, starting from a rectangular piece of material in double thickness constituting the two walls (19, 20) of the container, characterized in that it is removed by cutting in a lower angle of the two superimposed walls (19 and 20) a square of material whose side is equal to half the width of the walls, so as to form, at the other lower angle of the two superimposed walls, two square legs ( 4, 5), whose side is equal to half the width of the walls, the existing lateral connection possibly existing between the two legs is removed, if necessary, so that these two legs are free, possibly assembled 17280   the lateral edges of the two walls, above the legs (at 8 and 9), if these lateral edges are not already connected, the free bottom edge (D) of the lug secured to one of the walls at the edge is connected. lower (A) without tab of the opposite wall, and the lower free edge (B) of the tab integral with the other wall is connected to the lower edge (C) without tab of the wall opposite the other wall, the two legs being thus folded one above the other, in two perpendicular directions, to form the double bottom, flat and square of the container, bottom whose width is equal to that of the legs, the two connecting lines ( 15 and 14) of the legs to the walls of the container being located on the sides of the resulting double bottom, one on an inner edge-bottom and the other on an edge of the outer bottom, these two connecting lines having an end located at the same angle (16) of the square bottom. 3 Process according to claim 2, characterized in thatafter having removed by cutting a square of material of width equal to half of that of the walls, in a lower angle of the two superimposed walls, is slit on a short length (in 6 and 7 ) the two superimposed walls (19 and 20) along their longitudinal axis and in the extension of the internal lateral edge of the tabs, in order to form, on the lower free edge and without tab of each of the two walls, a flap (C, A) of small width, on which one will apply a portion (B, D) of the same small width of the free lower edge of the associated tab, to facilitate the connection then made between the free lower edge of this tab and the   lower edge devoid of tab of the opposite wall of the coach.   4 Process according to claim 2 or 3, characterized in that the double thickness of material constituting the two superimposed walls (19, 20) is obtained by means of two rectangular strips of material which are superimposed, or by means of a a single rectangular strip (1) of material, which is folded in two along its median transverse or longitudinal axis, or by means of a piece of cylindrical tube of material, which is   flattened for cutting generating said tabs. 2517280 -   Process according to Claim 4, characterized in that after the initial cutting giving rise to said   legs (4, 5) and after the possible formation of said flaps   (C, A), there is a gap between the two legs   length equal to the side of the square legs, possibly extended the width of said flap, to release   the legs of each other, when the two walls of the   neur are obtained from a piece of flattened cylindrical tube of material, one end of which forms the mouth of the container and whose other end forms the bottom of the container, in which case there is no connection to be made on the edges side of the container, or when the two superimposed walls of the container result from the folding of a rectangular strip of material along the longitudinal median axis thereof and that said tabs are formed along this median axis, a connection to be made on only one of the side edges container in this case.   The process of any one of claims 2 to 5, wherein   trimmed in that the bottom of the bag is closed over its entire periphery, to make it watertight, by connecting at the bottom of the walls of the bag the sides of the bottom not yet connected to these walls (in 17 and in 18).   7 Application of the process according to any one   from claims 2 to 6 to flexible containers having   their top two lifting loops separated by a slot of filling.