Reusable flexible packaging, designed for postal transport, protecting items from impacts

Abstract

The invention relates to a reusable flexible package (1), intended for postal transport, comprising: an outer envelope (2), with a closure and intended to present a postal address (3), and a device intended to be inserted into the outer envelope and allowing the securing and shock protection of at least one object (4), in which the reusable device is inflatable and deflatable and comprises a foldable plastic pouch (5) having a sealed air volume divided into interconnected compartments (6A, 6B), intended to be filled with air and inflated, so as to create an entrance (7A) and an inner compartment (7B) located between these air-filled compartments (6A, 6B), the inner compartment (7B) allowing to receive an object (4) which will be surrounded, secured and protected by these air-filled compartments (6A, 6B),The plastic bag (5) has a bidirectional valve (13) that allows air to enter or exit along an axis via a tube (14), in order to inflate or deflate the interconnected compartments (6A, 6B). (See Figure 1 for an abbreviation.)

Description

Title of the invention: Reusable flexible package, intended for postal transport, protecting objects against shocks

[0001] The invention relates to the field of flexible packages intended for postal transport. Prior Art

[0002] Online commerce has grown significantly, particularly since the Covid period, requiring the transport of increasingly large quantities of flexible packages.

[0003] Most flexible packages are now made of cardboard, and these boxes often need to be filled with different materials to protect the objects being transported, particularly fragile objects.

[0004] These boxes and materials are most often thrown away by the user, which causes a great deal of waste: economically (this notably involves the collection and mechanical transport of boxes for recycling or incineration), in terms of energy, and in terms of human and environmental resources.

[0005] This waste is no longer acceptable in view of climate change and the efforts needed to protect the planet.

[0006] In this context, to combat this waste, companies are already producing and selling flexible, foldable and reusable packages, for example made of fabric or plastic, which can be closed, for example with a zipper or adhesive strip.

[0007] These reusable flexible packages allow non-fragile objects, such as clothing, to be sent a certain number of times, and they can be easily stored after being folded, for example at the recipient's home, while they use it for another shipment of an object.

[0008] However, these flexible packages do not allow the transport of fragile objects, the use of cardboard boxes filling this gap.

[0009] In addition, most of these flexible packages are not actually reusable many times due to their often poor quality closure which can only withstand a few uses.

[0010] It is therefore necessary to find a flexible package that would be reusable while allowing the protection of fragile objects, and which is not made of cardboard. Document US2009 / 0266722 presents a package which comprises: a flexible bag, a foldable bag made of inflatable semi-rigid material with a rigid valve to protect a fragile object. This rigid valve must have a closing cap to allow the inflatable foldable bag to be watertight. Description of the invention

[0011] The present invention presents a reusable flexible package, intended for postal transport, protecting objects against shocks, comprising: a reusable outer envelope, with closure and intended to present a postal address, and a reusable device intended to be inserted into the outer envelope and allowing the wedging and protection from shocks of at least one object.

[0012] The reusable device is inflatable and deflatable, and comprises a foldable plastic bag having a sealed air volume divided into intercommunicating compartments, intended to be inflated and filled with air, so as to create an entrance and an interior housing located between these air-inflated compartments, the interior housing making it possible to receive an object which will be surrounded, wedged and protected by these air-filled compartments.

[0013] The plastic bag is formed by two superimposed plastic films, folded on themselves and heat-sealed to form a first part and a second part opposite the first part and separated from the first part by a fold.

[0014] The first part and the second part together form, in the space separating them, the inlet and the interior housing into which the inlet opens once heat-sealed to each other, the first part and the second part communicating fluidically through the fold allowing air to pass through, and forming the sealed air volume with the compartments.

[0015] The air volume is located between the two plastic films of the first and second fluidly communicating parts.

[0016] The plastic bag has a two-way valve which is capable of letting air in or out along an axis via a tube, to inflate or deflate the compartments communicating with each other.

[0017] The outer envelope is made of flexible material and has dimensions allowing the plastic bag to give the outer shape to the flexible postal package when it is inflated, this flexible envelope being stretched by the inflated plastic bag and advantageously closed by a fixing system such as a winding so as to maintain a pressure constraint on the entrance, preventing the object from exiting the interior housing of the plastic bag.

[0018] Advantageously, the two-way valve is flexible and made of plastic film.

[0019] Advantageously, the valve has a longitudinal passage, located between two heat-sealed longitudinal edges of plastic film, and which allows the tube to pass to the air volume.

[0020] Advantageously, the longitudinal passage has two opposite ends, one opening onto the air volume and the other onto the free air outside the plastic bag.

[0021] Advantageously, the longitudinal passage has two surfaces in contact with each other in the absence of a tube, under the action of the air pressure of the volume of air located on either side of the two surfaces, allowing the longitudinal passage to be closed.

[0022] Advantageously, the two longitudinal edges of the flexible valve are continuous welding points arranged so as to have a convergent shape to facilitate the flow of air and the guidance of the tube.

[0023] Advantageously, the convergent shape has several continuous narrowings of cross-section of the longitudinal passage, separated from each other by straight sections, in the direction from the outside towards the air volume, allowing the tube to be guided, without tearing of the longitudinal passage or of the plastic bag.

[0024] Advantageously, the longitudinal passage has for its longitudinal edges, after each continuous narrowing of cross-section a straight section, the straight sections having between them length ratios between them between 1 and 1.5.

[0025] Advantageously, the flexible valve is located symmetrically with respect to the air pressure inside the air volume, to avoid tearing of the plastic bag.

[0026] Advantageously, the thickness of each plastic film forming one of the two walls of the air volume of the plastic pocket is greater than or equal to 75 micrometers, advantageously greater than 100 micrometers.

[0027] Advantageously, point heat seals of the two plastic films intended to form the plastic pouch are configured to give a flattened sausage shape to the compartments located in the first and second parts.

[0028] Advantageously, the first part and the second part are heat-sealed and / or folded together on the left, right, and lower edges.

[0029] Advantageously, the first part and the second part are heat-sealed and / or folded together only on the left and right edges and the plastic pocket present in the interior housing, a flexible bag closed on a lower edge, right and left edges, and open on an upper edge which is heat-sealed with: the left and right edges, and advantageously on an upper inner circumference, of the first part and the second part.

[0030] Advantageously, an additional layer of puncture resistance is heat-sealed inside the plastic bag or inside the outer flexible envelope.

[0031] Advantageously, the additional layer is made of a non-stretch material, such as for example non-woven polypropylene.

[0032] Advantageously, the flexible outer envelope is foldable, and is made of fabric or plastic.

[0033] Advantageously, the flexible outer envelope has, towards its opening on a right edge and on a left edge, projecting, a self-adhesive strip, with a male part and a female part, one part per edge, which when rolled up the flexible outer envelope on itself from the opening leaves the male part and the female part outside the winding, these male and female parts then making it possible to form a handle by fixing the male and female parts, the envelope being closed following this winding.

[0034] Advantageously, the flexible outer envelope has at the end of its opening over its entire length a self-adhesive strip having a male part projecting from a first side of the envelope, and a female part projecting from a second side opposite the first side.

[0035] Advantageously, the outer soft envelope is made of: non-woven polypropylene, woven polypropylene, laminated or not, tyvex@, coated fabric such as coated oxford (600D), polyester for example such as the fabric shaped into a mesh called ripstop.

[0036] Advantageously, the polypropylene has a thickness greater than or equal to 90 grams per m2, advantageously greater than or equal to 120 grams per m2.

[0037] Advantageously, sealing of the closed flexible outer envelope is achieved by passing a clamping collar through two holes located on the two sides of the flexible outer envelope near the opening. Figures

[0038] Other objectives, characteristics and advantages will emerge from the detailed description which follows with reference to the drawings given for illustrative and non-limiting purposes, among which:

[0039] [Fig-1] represents a flexible, foldable and reusable postal package according to the invention, with a flexible outer envelope which receives an inflatable plastic bag

[0040] [Fig.2A] represents a top view of a first embodiment according to the invention formed of the two superimposed plastic films with visible vertical and horizontal heat seals, as well as the flexible valve heat sealed to the plastic bag between the two plastic films at a location where these two plastic films are heat sealed; these two films will be folded in figure 3 to give the plastic bag;

[0041] [Fig.2B] represents a top view of the first embodiment according to the invention of the plastic bag obtained by folding the two plastic films in a horizontal fold, allowing it to form an interior housing and an entrance opening onto this interior housing;

[0042] [Fig.3A] represents the flexible valve according to the invention which does not have a welding point in a longitudinal passage intended to receive a tube for inflating or deflating the plastic bag as many times as desired;

[0043] [Fig.3B] represents the insertion of the tube into the valve;

[0044] [Fig.4] represents the inflation of the plastic bag, with the air compartments communicating with each other;

[0045] [Fig.5A] shows the plastic bag filled with air and the valve system which prevents the air from escaping;

[0046] [Fig.5B] represents the insertion of the object into the plastic bag filled with air;

[0047] [Fig.6A] shows the insertion of the air-filled plastic bag into the envelope flexible exterior which has a self-adhesive strip located on either side of the flexible exterior pocket, with for example a male strand on a right edge and a female strand on a left edge;

[0048] [Fig.6B] shows the closing of the outer flexible envelope after rolling up the opening (for example as illustrated after 3 folds of the upper part of the foldable outer envelope), the self-adhesive part not rolling up in view of the positioning of its male and female strands;

[0049] [Fig.6C] represents the closed outer flexible envelope in which is located the inflated plastic pocket which gives the shape of the flexible package;

[0050] [Fig.7] represents the deflation of the plastic bag using the tube which is inserted into the flexible valve and which communicates between the exterior and the sealed volume of air;

[0051] [Fig.8A] represents a top view of the second embodiment according to the invention formed of the two superimposed plastic films with visible vertical and horizontal heat seals, as well as the flexible valve heat sealed to the plastic bag between the two plastic films at a location where these two plastic films are heat sealed; these two films will be folded in figure 3 to give the plastic bag;

[0052] [Fig.8B] represents a top view of the second embodiment according to the invention of the plastic pocket obtained by folding the two plastic films in a vertical fold, allowing it to form an interior housing and an entrance opening onto this interior housing. Definitions

[0053] The word “longitudinal” corresponds to the X direction extending along the length of the flexible valve.

[0054] The word "upper" describes the edge through which the object is inserted into the plastic pocket and the word "lower" the edge opposite the upper edge.

[0055] The words “right” and “left” designate the side edges located between the top edge and the bottom edge. Detailed description of the invention

[0056] As illustrated in all of the figures, the present invention relates to a reusable flexible package 1 intended for postal transport.

[0057] Presentation of the flexible package

[0058] As shown in [Fig.l], this reusable flexible package 1 comprises: a reusable outer envelope 2, intended to be closed and to present an address postal 3, and a reusable device intended to be inserted into the outer envelope and allowing the wedging and protection against shocks of at least one object 4.

[0059] The reusable device is inflatable, deflatable and re-inflatable, as many times as desired.

[0060] It allows any type of object 4 to be protected during transport, in particular fragile to very fragile objects, such as glass or porcelain objects for example.

[0061] As the flexible package is foldable, due to the materials which make up the flexible envelope and the plastic bag and due to the possible deflation of its plastic bag, it can easily be stored taking up little space after the multiple possible folds of the flexible envelope including the deflated plastic bag, or returned to the sender.

[0062] The device comprises a plastic bag 5 whose walls 5A are filled with air.

[0063] The outer envelope 2 is made of a sufficiently flexible material and has dimensions (fairly close to those of the inflated plastic bag, the outer envelope matching the shape of the inflated plastic bag) to allow the plastic bag 5 to give the shape to the flexible package when it is inflated.

[0064] The mechanical strength and rigidity of the flexible package that protects the object 4 is in reality provided by the plastic bag 5 and its large sealed air volume, and not by the foldable outer envelope. The air volume is very large to absorb any shock, and the inflated and air-filled plastic bag 5 appears rounded, swollen or plump.

[0065] For example, the air pressure may be between 0.2 bars and 0.4 bars.

[0066] The plastic bag 5 according to the invention plays a dual function: the function that plays, for example, as is the case in the state of the art today, a cardboard by its rigidity, and the function played by a device for wedging the object which would be placed in the cardboard, with the additional advantage that the plastic pocket 5 due to the air which it traps can adapt to any form of flexible package whose dimensions are compatible with its own.

[0067] In other words, today, in the state of the art, the cardboard and the elements for wedging the object 4 used inside the cardboard are equivalent to the plastic pocket 5 according to the invention which protects against any shock that the flexible postal package would receive during its transport, the external pocket according to the invention serving essentially to close the flexible package, to prevent punctures or tears in the plastic pocket and also to protect the object against bad weather or other factors.

[0068] The two materials of the plastic bag and the flexible envelope being different, their recyclability is better, as they are not welded together.

[0069] Presentation of the plastic bag

[0070] As illustrated more precisely in Figures 5A and 5B, the plastic bag 5 has a sealed air volume divided into compartments 6A, 6B communicating with each other, intended to be filled with air and inflated, so as to create an inlet 7A and an interior housing 7B located between these compartments 6A, 6B filled with air, this interior housing 7B making it possible to receive one or more objects which will be surrounded, wedged and protected by these compartments 6A, 6B filled with air.

[0071] The plastic pouch 5 is formed according to the following manufacturing method which is illustrated in particular in FIGS. 2A and 2B, and FIGS. 8A and 8B.

[0072] Two plastic films are superimposed in a first step, and point and / or continuous heat seals 8A, 8B, 8C are carried out in a second step on these two superimposed plastic films.

[0073] These two films will form the walls 5A between which the air will lodge, this air deforming the swollen walls 5A significantly and appearing rounded towards the outside.

[0074] These two films are then folded together on themselves in a third step, and once folded, heat-sealed together in a fourth step to form and hold fixed together a first part 9 and a second part 10 separated from the first part 9 by a fold 11 and intended to be opposite this first part 9.

[0075] The first part 9 and the second part 10 together form, through the space which separates them, an inlet 7A and the internal housing 7B into which the inlet 7A opens, once heat-sealed to each other, the first part 9 and the second part 10 forming the sealed volume of the plastic bag 5 filled with air after inflation.

[0076] The sealed air volume is located between the two plastic films of the two fluidly communicating parts.

[0077] In other words, the plastic pocket 5 is made by the fold 11 on themselves of the two superimposed plastic films and then this fold 11 is held by fixing facing edges by heat-sealing.

[0078] Thus, this fold 11 greatly facilitates the production of the plastic bag 5 and makes it possible to have a single sealed volume of air to inflate or deflate or re-inflate and so on, which makes these operations easy and quick for any user.

[0079] The fold 11 forming the plastic pocket 5 may be accompanied by a point heat seal at the fold 11 or at a distance from the fold 11 (several centimeters) depending on the location of the air compartments 6A, 6B that it is desired to create to protect the object 4.

[0080] There are many possibilities of realization, one is illustrated in the figures in figures 2A and 2B, the other in figures 8A and 8B.

[0081] In the first embodiment illustrated in Figures 2A and 2B, the first part 9 and the second part 10 are heat-sealed with heat-seals 8C' and / or folded together only on the left edge, the right edge, and the bottom edge.

[0082] In the second embodiment illustrated in Figures 8A and 8B, the first part 9 and the second part 10 are heat-sealed and / or folded only on the left edge and the right edge (but open on the upper and lower edges) and have in the interior housing 7B, a flexible bag closed on a lower edge and open on an upper edge is heat-sealed: with the left and right edges, and advantageously on an upper inner periphery of the first part 9 and the second part 10.

[0083] The heat-sealed points 8A, 8B, 8C made can have a given geometry to give the desired shapes to the air compartments 6A, 6B when the latter are inflated and filled with air.

[0084] In particular, those made on the two superimposed plastic films, before folding these two plastic films to make the plastic pocket 5 with the first and second parts 10s facing each other to make the entrance 7A and the internal housing 7B.

[0085] Thus, the air compartments 6A, 6B can have, for example, once inflated and filled with air, the shape of a flattened sausage allowing a compactness of the flexible package facilitating its transport and at the same time a great protection against impacts of the object 4.

[0086] A sausage may be produced at the lower end having a flattened shape with flared ends following inflation and filling with air which flare these ends under the pressure of the air, making it possible to protect the flexible package during its transport, and for example when it is placed on a conveyor belt during postal sorting.

[0087] Similarly, continuous or point heat-welds 8C' between the first part 9 and the second part 10 are carried out to fix them to each other and to produce the entrance 7A and the internal housing 7B of the object 4, after their folding 11.

[0088] It should be noted that the materials and thicknesses used for the plastic films allow the plastic bag 5 to remain filled with air, even under high weight constraints. A user can stand on the plastic bag 5 without deflating the latter.

[0089] In particular, the thickness of each plastic film forming one of the two walls 5A or sides of the air volume of the plastic pocket 5 is greater than or equal to 75 micrometers, advantageously greater than or equal to 100 micrometers.

[0090] The plastic bag can be made with the following materials: polyethylene with nylon or thermoplastic elastomer.

[0091] For example, between 60%-85% polyethylene and between 15%-40% nylon.

[0092] Thanks to the nylon, the user has no risk of over-inflation or bursting of the plastic bag when using the tube 14 (or straw).

[0093] An additional layer of puncture resistance may be heat-sealed inside the plastic pocket 5.

[0094] For example, the additional layer is made of a certain type of material such as non-woven polypropylene.

[0095] Presentation of the bidirectional valve

[0096] An essential element of the invention is that the plastic bag 5 has a bidirectional valve 13 which is capable of letting air in or out along an axis via a tube 14, such as a straw, as illustrated in particular in Figures 4 and 7.

[0097] This bidirectional valve 13 thus makes it possible to inflate or deflate the compartments 6A, 6B communicating with each other, in particular via the fold, which makes the flexible package reusable as many times as desired.

[0098] Very advantageously, it is flexible and is made of plastic film, as illustrated in Figures 3A and 3B.

[0099] For example, by way of illustration but not limitation, it is formed by two symmetrical plastic cutouts from a plastic film, of rectangular shape, which are superimposed and heat-sealed together.

[0100] It has a longitudinal passage 15 located between two longitudinal edges 16A, 16B continuously heat-sealed and which allows the tube 14 to pass to the air volume.

[0101] This longitudinal passage 15 therefore does not have any heat-sealing or other element which could hinder the passage of the tube 14 and which would have the purpose of only allowing the passage of the air flow in one direction.

[0102] The longitudinal passage 15 has a length less than that of the tube 14 which is partially retracted during inflation of the air volume, and completely retracted during deflation of the air volume.

[0103] The longitudinal passage 15 has two opposite ends 15A, 15B, one opening onto the air volume and the other onto the free air outside the plastic bag 5.

[0104] The valve produced is fixed to the plastic bag 5 so that the longitudinal passage 15 is free to move in the sealed air volume, for example in one of the compartments 6A, 6B, as illustrated in [Fig.5B].

[0105] The longitudinal passage 15 free of movement in the sealed air volume has two surfaces 15C in contact with each other in the absence of tube 14, under the action of the air pressure of the air volume located on either side of the two surfaces 15C, making it possible to close the longitudinal passage 15 and thus keep the air in the volume of the compartments 6A, 6B, the volume being made sealed by this adhesion under the air pressure of the two surfaces 15C in contact, when the plastic bag 5 is filled with air.

[0106] Very advantageously, these two longitudinal edges 16A, 16B of the flexible valve have welding points with a convergent shape to facilitate the flow of air and guiding the tube 14, preventing the flexible valve from tearing when the tube 14 passes through to the air volume.

[0107] More precisely, as illustrated in particular in [Fig.3A], the convergent shape may have several successive narrowings 17A, 17B whose variation in cross-section (perpendicular to the length of the valve) decreases progressively or continuously along the length in the direction from the outside to the inside of the plastic bag 5. In other words, these are not straight steps.

[0108] The cross sections of the longitudinal passage 15 are separated from each other by straight longitudinal sections 18A, 18B, allowing the tube 14 to be guided without tearing the longitudinal passage 15 or the plastic bag 5, by delicately guiding the tube 14 into the longitudinal passage 15.

[0109] The longitudinal passage 15 has, between each continuous narrowing of cross-section, straight sections 18A, 18B of comparable length.

[0110] The longitudinal passage 15 may have, for example, a length / width ratio of between 4 and 10 for, for example, a length greater than 5 cm.

[0111] The width of the longitudinal passage 15 which allows the tube 14 to pass through is adapted to the size of the plastic bag 5 to be inflated.

[0112] It may, for example, be greater than 5 mm, allowing a tube 14 to be inserted there, inflating the plastic bag 5 very quickly.

[0113] An element to facilitate the insertion of the tube 14 and which is not shown in the figures can be welded to the external inlet 7A of the flexible valve, and can have for example a truncated cone shape.

[0114] For the attachment of the flexible valve to the plastic bag 5 during the first manufacturing step, the flexible valve already produced beforehand is placed between the two plastic films before being heat-sealed with the latter, as illustrated in FIGS. 2A, 2B, 8A, 8B.

[0115] The flexible valve is welded to a given location T of the plastic bag 5.

[0116] The heat-sealing location T on the plastic bag 5 is located in a sen possibly symmetrical with respect to the air pressure inside the sealed air volume of the plastic bag 5, to avoid tearing during insertion of the tube 14 into the longitudinal passage 15.

[0117] Presentation of the flexible outer envelope

[0118] The flexible outer envelope may advantageously be made of fabric or plastic. It may be, for example, made of: non-woven polypropylene, woven polypropylene, laminated or not, tyvex ® , coated fabric such as coated oxford (600D), laminated or not polyester, tyvex ®, coated oxford, polyester such as ripstop fabric.

[0119] It can be of any shape adapted to that of the object 4 to be transported and to that of the inflated plastic bag 5 allowing it to be protected against shocks. It can have straight, flared or other ends.

[0120] It is illustrated in particular in Figures 6A to 6C.

[0121] It makes it possible to prevent the object 4 located in the interior housing 7B from exiting through the entrance 7A always left open of the plastic pocket 5, this flexible envelope being stretched by the plastic pocket 5 filled with air and therefore maintaining a mechanical constraint or pressure on the entrance 7A preventing the object 4 from exiting through the closure that this flexible envelope presents.

[0122] Thus, the inflatable and deflatable device does not need heat-sealing or any other system to close its inlet 7A, which makes it directly reusable as many times as desired.

[0123] For the closure of the outer envelope, any solution is possible.

[0124] A possible solution is that the flexible outer envelope has at the end of its opening 2C on a right edge 2A and on a left edge 2B, projecting, a self-adhesive strip 19, with a male part 19A and a female part 19B, one part per edge, which when the flexible outer envelope is wound on itself from the opening illustrated in [Fig.6B], leaves the male part 19A and the female part 19B outside the winding, these male and female parts then making it possible to form a handle, by fixing the latter (for example with their hooks and their wire loops), the outer envelope being closed following this winding.

[0125] In an alternative embodiment, the flexible outer envelope has at the end of its opening over its entire length on its two 2D sides a self-adhesive strip 19 having, projecting from a first 2D side of the envelope, a male part, and projecting from a second 2D side opposite the first 2D side, a female part 19B.

[0126] It is also possible to simply make a flexible envelope with projecting strips which, after rolling the flexible envelope on itself, are attached to each other by a knot.

[0127] The flexible envelope can also be closed with snap fasteners, magnets or any other removable fastening means.

[0128] After this closure, a sealing of the flexible outer envelope can be carried out.

[0129] For example, this sealing can be achieved by passing a clamping collar 20 through two holes 21 located on the two 2Ds of the flexible outer casing near the opening.

[0130] This clamp 20 may have an identification mark linked to the identification of the flexible package, allowing the user to be certain that his flexible package has been opened or not if the clamp 20 that he receives does not have the identification number that it should have.

[0131] An additional layer of puncture resistance and which is not shown on the figures, can also, as for the plastic pocket 5, be heat-sealed inside the flexible outer envelope.

[0132] For example, the additional layer can be made with non-woven polypropylene.

Claims

Claims

1. Reusable flexible package (1), intended for postal transport, protecting objects against impacts, comprising: a reusable outer envelope (2), intended to close the flexible package and to present a postal address (3), and a reusable device intended to be inserted into the outer envelope and allowing the wedging and protection from impacts of at least one object (4), in which: • the reusable device is inflatable and deflatable, • the reusable device comprises a foldable plastic bag (5) having a sealed air volume divided into compartments (6A, 6B) communicating with each other, intended to be inflated and filled with air, so as to create an inlet (7A) and an interior housing (7B) located between these compartments (6A, 6B) inflated with air, the interior housing (7B) making it possible to receive an object (4) which will be surrounded, wedged and protected by these compartments (6A, 6B) filled with air, • the plastic pocket (5) is formed by two superimposed plastic films, folded on themselves and heat-sealed to form a first part (9) and a second part (10) opposite the first part (9) and separated from the first part (9) by a fold (11), • the first part (9) and the second part (10) together forming in the space separating them, the inlet (7A) and the interior housing (7B) into which the inlet (7A) opens once heat-sealed to each other, the first part (9) and the second part (10) communicating fluidically via the fold (11) and forming the sealed air volume with the compartments (6A, 6B), • the volume of air being located between the two plastic films of the first part (9) and second part (10) communicating fluidly, • the plastic bag (5) has a two-way valve (13) which is capable of letting air in or out along an axis via a tube (14), to inflate or deflate the compartments (6A, 6B) communicating with each other, • the outer casing (2) is made of flexible material and has dimensions allowing the plastic bag (5) to give the external shape to the flexible postal package when it is filled with air and inflated, this flexible external envelope (2) being stretched by the inflated plastic bag (5) and allowing, by its closure located at the entrance of the plastic bag (5), to prevent the exit of the object (4) from the internal housing (7B) and from the entrance (7A) of the plastic bag (5), in which: • the two-way valve (13) is flexible and made of plastic film;• the valve has a longitudinal passage (15), located between two longitudinal edges (16A, 16B) heat-sealed with plastic film, and which allows the tube (14) to pass to the volume of air, • the longitudinal passage (15) has two opposite ends (15A, 15B), one opening onto the volume of air and the other onto the free air outside the plastic bag (5), • the valve produced is fixed to the plastic bag (5) so that the longitudinal passage (15) is free to move in the sealed volume of air, • the longitudinal passage (15) has two surfaces (15C) in contact with each other in the absence of a tube (14), under the action of the air pressure of the volume of air located on either side of the two surfaces (15C), making it possible to close the longitudinal passage (15), the volume being made sealed by this adhesion under the air pressure of the two surfaces 15C in contact, when the plastic bag 5 is filled with air.;

2. Reusable flexible package (1) according to the preceding claim, in which two longitudinal edges (16A, 16B) of the flexible valve are continuous welding points arranged so as to have a convergent shape to facilitate the flow of air and the guidance of the tube (14).

3. Reusable flexible package (1) according to the preceding claim, in which the converging shape has several continuous narrowings (17A, 17B) of cross-section of the longitudinal passage (15), in the direction from the outside towards the air volume, separated from each other by straight sections (18A, 18B), allowing the tube (14) to be guided, without tearing the longitudinal passage (15) or the plastic bag (5).

4. Reusable flexible package (1) according to one of the preceding claims, in which the longitudinal passage (15) has for longitudinal edges (16A, 16B), after a continuous narrowing of cross-section a straight section, the straight sections (18A, 18B) located after each longitudinal edge (16A, 16B) having between them length ratios between them between 1 and 1.

5.

5. Reusable flexible package (1) according to one of the preceding claims, in which the flexible valve is formed by two symmetrical plastic cutouts from a plastic film, of rectangular shape, which are superimposed and heat-sealed with each other.

6. Reusable flexible package (1) according to the preceding claim, in which the longitudinal passage (15) of the bidirectional valve has a length / width ratio of between 4 and 10, for example a length greater than 5 cm.

7. Reusable flexible package (1) according to one of the preceding claims, the longitudinal passage (15) has a length less than that of the tube (14) which is intended to partially enter the longitudinal passage (15) when inflating the volume of air, and completely enter the longitudinal passage (15) when deflating the volume of air.

8. Reusable flexible package (1) according to one of the preceding claims, in which the thickness of each plastic film forming a wall (5A) of the air volume of the plastic bag (5) is greater than or equal to 75 micrometers, advantageously greater than or equal to 100 micrometers.

9. Reusable flexible package (1) according to one of the preceding claims, the plastic bag is made of elastomeric thermoplastic or polyethylene with nylon, for example between 60%-85% polyethylene and between 15%-40% nylon.

10. Reusable flexible package (1) according to one of the preceding claims, in which point heat seals (8A, 8B, 8C) of the two plastic films intended to form the plastic pocket (5) are configured to give a flattened sausage shape to each compartment (6A, 6B) located in the first part (9) and second part (10).

11. Reusable flexible package (1) according to one of the preceding claims, wherein the first part (9) and the second part (10) are heat-sealed by heat-seals (8C') and / or folded together on one edge left (12A), a right edge (12B), and a bottom edge (12C).

12. Reusable flexible package (1) according to one of the preceding claims, in which the first part (9) and the second part (10) are heat-sealed and / or folded together only on left and right edges and the plastic bag (5) has in the inner housing (7B), a flexible bag closed on a lower edge, right and left edges, and open on an upper edge which is heat-sealed with: the left edge and the right edge, and advantageously on an upper inner periphery, of the first part (9) and the second part (10).

13. Reusable flexible package (1) according to one of the preceding claims, in which an additional puncture-resistant layer is heat-sealed inside the plastic bag (5) or inside the outer flexible envelope (2).

14. Reusable flexible package (1) according to the preceding claim, in which the additional layer is made with non-woven polypropylene.

15. Reusable flexible package (1) according to one of the preceding claims, in which the flexible outer envelope (2) is foldable and is made of fabric or plastic.

16. Reusable flexible package (1) according to one of the preceding claims, in which the closure of the flexible envelope (2) is carried out by any removable fixing means.

17. Reusable flexible package (1) according to one of the preceding claims, in which the closure is achieved by rolling the flexible outer envelope towards the entrance of the plastic bag so as to prevent the object (4) from exiting, the rolling making it possible to stretch the flexible outer envelope (2) around the inflated plastic bag (5) containing the object (4).

18. Reusable flexible package (1) according to the preceding claim, in which the flexible outer envelope (2) has at its opening on a right edge and on a left edge, a projecting self-adhesive strip (19), with a male part (19A) and a female part (19B), one part per edge, which when the flexible outer envelope is wound on itself from an opening (2C) leaves the male part (19A) and the female part (19B) outside the winding, these male (19A) and female (19B) parts then making it possible to form a handle by fixing the male (19A) and female (19B) parts, the outer envelope (2) being closed following this winding.

19. Reusable flexible package (1) according to one of the preceding claims, in which the outer flexible envelope is made of: non-woven polypropylene, woven polypropylene, coated fabric, polyester.

20. Reusable flexible package (1) according to one of the preceding claims, in which a sealing of the closed flexible outer envelope is carried out by passing a clamping collar (20) through two holes (21) located on two sides (2D) of the flexible outer envelope near the opening (2C).

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