FR2553381A1 - TRANSPORT BAG - Google Patents

Abstract

ONE OF THE WALLS 19 OF THE BAG, FOLLOWING THE INVENTION, INCLUDES A FLAP 9 WHICH IS PLATED ON ITS FACE FACING THE OTHER WALL 21. A CROSSBAR 14 CARRYING A HANDLE 15 IS HELD PRISONER IN A HEM 20 CONSTITUTING THE CONNECTION BETWEEN THE FLAP AND THE FACE 19. THIS FLAP CARRIES A SLIT 7 VERY NEAR THE WELD LINE 26 WHICH SHAPES THE HEM 20. THE SECOND WALL 21 OF THE BAG IS PROVIDED WITH A FREE TOP EDGE 2 ASSOCIATED WITH A SUSPENSION SYSTEM INCLUDING A WELDED BAR 17 WITH FREE EDGE AND A HOOK 18. THE FREE PART OR FLAP 21A OF THE WALL 21 IS ENGAGED IN THE POCKET 25 AND THE HOOK 18 CROSSES THE SLOT TO COME OVER THE CROSSER 14 IN L 'INSIDE THE HANDLE 15. ISOTHERMAL TRANSPORT BAG.

Description

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  The present invention relates to the transport bags, in particular, but not exclusively, to the isothermal transport bags, for example those intended for the transport of frozen products It is moreover with reference to this type of bags that the present invention will be explained. There are in practice many types of transport bags, in particular those obtained from thin plastic films, cut and heat-sealed These bags generally meet the following definition: They comprise: two flexible walls in vis-à-vis, each having two side edges, a bottom edge and an upper edge, the opposite side edges, as well as the opposite bottom edges, being continuously joined, so as to define a useful volume; a gripping means, for example at least one carrying handle, integrated or attached to the bag, for suspending at least

  a wall in the hand of the user.

  By selecting a sheet-form heat-insulating plastic material, for example a complex comprising a thermal insulation foam and a reflective film, and cutting and welding this material according to the configuration previously described, it is normally necessary to obtain a

thermo-insulating bag.

  In fact, the choice of a good thermo-insulating material is not sufficient to obtain a bag having good thermal preservation performance. Is it still necessary to find a system for opening and closing the bag, between the upper edges of the two? walls, satisfying the following constraints: a) in the open position, provide a very large passage section for introducing into the bag objects of large size; b) in the closed position, and in particular during the transport of the aforementioned objects, present at the opening of the bag a configuration preventing any heat exchange between the ambient air and the inside of the bag, mainly by convection, but

also by radiation.

  The second constraint is actually aggravated in practice by the following factors: on the one hand, the volume of products transported, but

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  especially the weight of the latter, tend to pull the walls at the opening of the bag, and thus open the latter; and on the other hand, when a user carries the loaded bag, while walking, the load rises and lowers alternately, resulting in matching a retraction and then an increase in the interior volume of the bag, so a real "breathing" of this last

with the ambient air.

  A first solution to the technical problem described above is to report, for example by thermo-welding, on the upper edge of each wall, a sleeper integral with a handle, the whole being relatively rigid plastic material, and the handles being located outside the usable volume; the two crosspieces can be fixed in a reversible manner, for example by a plurality

  male elements on one of them, snapping into a plurality of female elements on the other.

  Such a solution is for example shown by the request of

German Patent 2,853,061.

  This solution does not seem to give complete satisfaction:

  under the effect of a significant weight, a partial opening 20 at the upper edges remains possible.

  or else, it is necessary to provide a large number of latching elements, and to open the bag, it is necessary to exert a major separation force between the sleepers, and there is a risk of tearing

  the connection between the lateral edges of the bag.

  Another solution is to provide a flap bound continuously to the upper edge of one of the two walls, folded or foldable towards the inside of the useful volume and towards the bottom, so as to define

  a bag of protection of the opening of the bag.

  The gripping means of the bag cooperates with the flap in several variants.

  In a first variant, shown for example by the French utility certificate 2 173 117, the British patent 1 396 290, the French patent 1 383 129, and the German utility model 1 906 449, a cutting having the In correspondence with the orifice disengaged by the tongue, and when the flap is folded over the opening of the bag, two coinciding openings in the upper parts of the bag are made in the form of a tongue directed downwards in the flap. two walls respectively By inserting the tongue in these two openings, to bring out the other side, that is to say "a-

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  from the c 8 tee of the wall with flap, and turning this tab towards

  the top, it is possible to clear a passage for the hand of the user.

  According to this variant, when the tongue is introduced towards the inside of the working volume, the latter communicates freely with

  the outside of the bag, through the openings in the flap and walls This solution is not acceptable for a thermosolant bag.

  In a second variant, illustrated by the European patent application 0 040 974, a cut is made in the form of a tongue directed upwards, straddling the opening of the bag, ie in the flap. , but also in the upper part of the corresponding wall The upper edge of the wall without flap is provided with a cross member and the same wall has an opening under this crosspiece In this way, to close and carry the bag, first or introduces the wall with crossbar in the protective pocket, secondly, we pass the tongue in the opening, and third is reversibly attached (press button for example) the end of the tongue on the wall without flap It is possible to enter the bag, under the crossbar, in the cutout

by the tongue.

  According to this variant, the opening of the bag is effectively protected, during transport, on the one hand thanks to the flap, and on the other hand thanks to the tongue. However, there are still two passages allowing communication between the useful volume of the bag. bag and ambient air; these are located, between the crossbar and the tongue, on each side

of the latter, under the flap.

  In a third variant, shown for example by the Swedish patent 364 920 and the Swiss patent 507 682, the upper edge of the wall without flap is secured to a carrying frame, relatively rigid plastic material This frame comprises a cross member, thermo -welded on the aforementioned border, and a handle connected to this cross member, and external to the useful volume In correspondence with the handle, an opening in the wall with flap is provided at their connection To close and carry the bag, firstly introduces the wall with handle in the flap, and secondly we pass the handle in the opening It is possible to enter the closed bag

by the handle.

  According to this variant, if the opening is strictly adapted to the handle from the point of view of shape and dimensions, we obtain a relatively tight bag opening and closing system But this solution does not allow to carry a significant weight because then the wall without flap stretches downwards, altering the seal 5 of the bag at the level of the flap on the one hand, and deteriorating the integrity of the

  on the other hand, the thermo-welds are likely to tear.

  The present invention relates to a transport bag, retaining a good seal between its upper edges, when the latter

  is closed and suspended by the hand of the user, including under heavy weight.

  For this purpose, in general, means are provided for removably securing, over substantially their entire width, the two upper edges, and this inside the pocket.

of the bag.

  In particular: the carrying frame is integral with the wall with flap, at their connection, that is to say between the upper edge of said wall and the flap, or at this upper edge; there is provided at least one suspension means of the wall not bound to the flap, to the transverse amount of the carrying frame; this means comprises a transverse bar, integral with the upper edge of this wall substantially along its entire width, and a hook connected to this bar, adapted to cooperate reversibly with the cross member of the carrying frame; at least one corresponding slot is made in the flap or the wall connected to the latter, at the level of the upper edge of this wall, for the passage of the hook According to this particular embodiment of the invention, the bag is closed by introducing the upper border of the wall without flap into the protective pocket, passing the hook of the suspension means in the slot, and hooking the hook on the crossbar of the carrying frame The bag is thus ready to be seized over there

hand of the user.

  In general, the invention makes it possible: to gather all the tractions exerted on each wall, under the effect of the transported weight, more or less regularly, at and substantially the entire width of each edge; to gather together the tractions together, including

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  those of the wall not linked to the handle, for the transfer on the latter. The transported weight is thus better distributed, on the one hand between the two walls of the bag, and on the other hand according to the width of the same wall. In a particular way, if we fit closely in shape and dimensions, the hook and the slot, we obtain excellent

tightness of the bag.

  For the purposes of the present invention, the term "continuous bond" or "lii continuously" means a bond constituted by the material constituting the walls of the bag, for example bellows shaped, attached or not to said walls, or a connecting means. separate from said material, or a connection by welding (for example thermo-welding), sewing,

or other equivalent solution.

  The expression "substantially the entire width" indicates a regular distribution, if not continuous, on either side of the middle of the bag, the total length of this distribution being understood

  between half and the entire width of the bag.

  The accompanying drawing, given by way of example, will make it possible to better understand the invention, the characteristics that it presents and the advantages that it will be able to provide: FIG. 1 illustrates the cut blank from which the

  According to the invention, the carrying frame and the suspension means are shown separately.

  FIG. 2 is a view showing the bag according to the invention at

  position in which it can be loaded.

  Fig 3 is a section along III-III (fig 2) partially seen

in perspective.

  Fig 4 is a view similar to that of Fig 2, but illustrating the bag in its closed position.

  Fig 5 is a view similar to that of fig 3, but showing

  the introduction of the hook in the slot of the flap.

  Fig 6 is a section along VI-VI (fig 4) and illustrating

  similar to that of FIG. 3 and 5 the manner in which the suspension means is locked to the cross member of the carrying frame.

  Fig 7 illustrates a variant of the closure of the bag according to the invention. In order to produce the bag according to the invention, a blank 1, shown in FIG. 1, is firstly cut from a sheet of plastics material.

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  flexible, for example a thermo-insulating complex The blank 1 is in the form of a rectangle whose two angles joining one of its small sides 2 to its two large sides 8 are truncated so as to constitute two sides cut 3 and 4 is observed the presence of an oblong opening 5 located parallel to the second small side 6 of the blank 1, and relatively short distance therefrom Near the opening 5 exists a slot 7 parallel to said opening exact location of the opening and the slot will be better determined in the

continued hereof.

  To form the bag according to the invention, fold the blank around a line 8 shown in broken lines and which forms the longitudinal axis of symmetry of the opening 5 to make a flap 9 is then folded three times the blank 1 around lines 10 to 12 illustrated

  in broken lines to form a bellows bottom.

  FIG. 1 also shows a carrying frame 13 made of a sufficiently rigid plastic material constituted by a cross-member 14 at the center of which there is a handle 15 The carrying frame

  is preferably made by molding.

  Note also the presence of a suspension system 16 also 20 sufficiently rigid plastic material having a bar 17 which is associated with a hook 18 Again, the suspension system

is made by molding.

  Once the flap 9 has been folded so that it is applied against the first wall 19 of the bag, the handle 15 is introduced into the opening 5 so that the line 8 rests on the top of the two parts of the cross member. The flap 9 is then welded along a weld line immediately below the cross-member so that the handle 15 is located in a hem 20 (FIG. suspension 16 16, its bar 17 is welded or trapped in a suitable hem

along side 2.

  It can be seen in FIG. 2 that the imaginary line joining the bottom of the two cut faces 3 and 4 is located slightly below the small c 8 tee 6 forming the free edge of the flap, once it has been pressed against the face interior of the first wall 19 and towards the

bottom of the bag.

  After the bellows bottom 24 has been made by folding W of the blank, the second wall 21 is applied against the first 19, so that the side 2 which corresponds to the free edge of the wall 21

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  is located at a level such that the hook 18 is at the height of the cross member 14 located in the hem 20, as will be explained further later is welded then the two side edges 22, 23 constituted by the large folded sides of the blank 1, such that a useful volume is defined with the bottom 24 The welding of the edges 22, 23 also allows that of the lateral edges of the flap 9, so that it constitutes with the fold line 8 a pocket 25 (FIG. 3) open towards the bottom of the bag The weld of the lateral edges of the flap 9 also closes the two ends of the hem 20, so that the carrying frame 13 is then immobilized definitively by

relative to the wall 19 of the bag.

  It will be readily understood that the location of the oblong opening 5 is determined according to the importance which it is desired to give to the flap 9, that is to say to the depth of the pocket. As for the slit 7, it is located as illustrated in FIG. 3, very close to the connection or weld line 26 which forms the hem 20, so that the hook 18

located at the crossing 14.

  It is observed that the suspension system 16 is welded or rendered

  secured by its bar 17 to the upper edge of the wall 21 (c 8 té 2), so that its hook 18 is turned inwardly of the useful volume of the bag.

  To load the bag, the suspension system is removed from the carrying frame Once the bag is loaded, the upper edge or flap 21a of the wall 21 having the suspension system inside the pocket is introduced. 25, as illustrated in FIG. 5, and then the hook 18 is raised so as to make it pass through the slot 7 made in the flap 9 at its connection with the wall 19. The hook is finally put in place by overlapping the crosspiece 14 the frame 13, above the hem 20 It is then observed that the hook is engaged 30 in the inner space 15 of the handle 15 through which the user's hand passes (FIG. 6). substantially across their width the two walls 19 and 21 against each other,

at the opening of the bag.

  So that the edges of the opening 5 are well secured to the cross member 14 of the carrying frame 13, it is also intended to weld the side walls of the hem 20 to said cross-member, particularly at the edges considered. In this way, the edge 8 of the flap other than its side edges, and the upper edge of the wall 21 are continuously bonded to and respectively to

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  two lateral faces of the cross member 14.

  It goes without saying that the width of the slot 7 is provided for such

  so that it is closely adapted to the shape of the hook 18.

  To open the bag, it is obvious that one proceeds in exactly the opposite way to that described above, that is to say that the user begins by uncoupling the hook 18 and the cross 14, then passes this hook in the slot 7 to release the shutter

21a of the wall 21 of the pocket 25.

  It must be understood that the foregoing description has been given by way of example only and does not in any way limit the

  field of the invention which would not be extended by replacing the details of execution described by any other equivalents. In particular, it will be noted that it would be possible to provide in the flap 9 at its connection with the wall 19 several slots 7, while the suspension system would include as many hooks 18 which would overlap the cross member 14 on either side of the handle 15 Similarly, the slot 7 could be formed in the wall 19, the hook 18 is then rotated to with respect to its position shown in FIGS. 1 to 6. According to another embodiment of the invention illustrated in FIG. 7, the hook 18 is eliminated while retaining only the bar 17 which comprises male elements. or females 27 snaps proper to snap with complementary elements

  28 carried by the cross member 14 of the handle 15, or a lower extension 14a thereof At this time, the slot 7 is removed.

  The fastening of the two walls is of course carried out inside the pocket 25, so as to retain the advantages described at the beginning.

present.

  In another embodiment not shown, it could be provided to include in the upper part of the wall 19 a transverse rod distinct from the cross member 14 and carrying the elements 28 complementary to those 27 of the bar 17 Thus closing the bag , always taking place in the pocket 25, would be achieved by simply locking the two walls of the bag at its opening, this locking of course extending over substantially the entire

width of said walls.

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RE V E N D I C AT IO N S

  1 carrying bag comprising: two flexible walls (19-21) vis-à-vis, each having two side edges, a lower border and an upper edge, the opposite lateral edges (22, 23), as well as the borders opposed opposing, being continuously connected, so as to define a useful volume a flap (9) continuously connected to the upper edge of one of the two walls (19), folded or foldable inwardly of the useful volume and to the bottom, so as to define a protective pocket (25) of the upper edge (2) of the other wall a carrying frame (13) having a cross member secured to the upper edge of one of the two walls (19) at substantially its entire width, and a handle (15) connected to the cross member, and external to the working space, characterized in that means (13-16, 27-28) are provided for releasably securing substantially any their width the two bo upper breaks

  two walls (19, 21) inside the pocket (25).

  2 transport bag according to claim 1, characterized in that the securing means of the two walls (19, 21) are carried by a bar (17) integral with the upper edge (2) of the wall (21) having no not the pocket (25), according to

  its entire width, and the cross member (14) of the carrying frame (13) 25 which is secured to the wall (19) with flap at their connection.

  3 transport bag according to claim 1, characterized in that it provides:

  that the carrying frame (13) is secured to the wall (19) with flap (9) at their connection.

  at least one suspension means (16) of the wall (21) not connected to the flap, to the cross member (14) of the carrying frame (13), comprising a transverse bar (17) integral with the upper edge (2). ) of said wall (21), along substantially its entire width, and a hook (18) connected to said bar, adapted to cooperate reversibly with the cross member (14) of said armature (13) and at least one corresponding slot formed in the flap (9) or the wall (19) connected to the latter, at the edge

  upper of said wall for the passage of said hook (18).

  4 transport bag according to claim 3, characterized in that

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  that on the one hand the suspension means comprises several hooks (18) regularly distributed along the bar (17) and connected thereto, and on the other hand is provided in the flap (9) or the wall (19)

  related to the latter several corresponding slots.

  5 Carrying bag according to claim 3, characterized in that the section of the slot (7) is closely adapted to the shape of the

hook (18).

  Carrying bag according to claim 3, characterized in that

  that the hook (18) is turned towards the inside of the working volume and the slot (7) is arranged in the flap (9).

  7 transport bag according to claim 3, characterized in that the flap (9) and the wall (19) to which it is connected form a hem (20) with central opening (5), the cross member (14) of the carrying frame being gripped in the hem while the handle (15) passes through the central opening (5) and in that the edge of the flap other than its side edges and the upper edge of said wall are continuously bonded and respectively at both side faces of said crosspiece 8 Carrying bag according to claim 3, characterized in that the upper edge (8) of the wall (19) with flap (9) is

  located above the upper edge (2) of the other wall (21).

  9 Isothermal transport bag, particularly for transporting

  frozen food products according to any one of the preceding claims, characterized in that the walls (19, 21) and the flap (9) consist of an isothermal material.