Packaging for compressible flexible items, industrial packaging method using same, and items thus packaged

Abstract

The aim of the invention is to provide a flexible, environmentally friendly and durable packaging bag, in particular for industrial packaging of paper diapers (3). To this end, the invention relates to a packaging bag (1) for paper diapers (3), consisting of a sleeve (4):-formed from a single piece, preferably in a substantially rectangular shape, the opposite longitudinal edges (5, 6) of which are joined together (56); opening at one end (8) thereof; -closed at its opposite ends by a folding bottom (7); -the open end (8) is connected to the bottom (7) by two faces (11, 12) defined by two longitudinal fold lines (9, 10) and two end edges (13, 14) defining this open end (8); one face (11) of these faces (11, 12) comprises opposite longitudinal edges (5, 6) of the sleeve (4), integrally joined together. The invention also relates to a bale (24) of bags (1). Another object of the invention is an industrial packaging method.

Description

(19) State Intellectual Property Office (12) Invention Patent Application (10) Application Publication Number (43) Application Publication Date (21) Application Number 202480046121.1 (22) Application Date 2024.07.09 (30) Priority Data FR2307338 2023.07.10 FR (85) PCT International Application Entering National Phase Date 2026.01.08 (86) PCT International Application Application Data PCT / FR2024 / 050935 2024.07.09 (87) PCT International Application Publication Data WO2025 / 012565 FR 2025.01.16 (71) Applicant BB Distribe Company Address Laval-Sul-Vollogne, France (72) Inventor Laurent Andres (74) Patent Agency Beijing Guohao Tiancheng Intellectual Property Agency Co., Ltd. 11315 Patent Attorney Nan Ting Li Youcai (51) Int.Cl. B65D 30 / 00 (2006.01) B65D 30 / 18 (2006.01) B65D 33 / 00 (2006.01) B65D 33 / 14 (2006.01) B65D 33 / 18 (2006.01) B65D 33 / 22 (2006.01) B65D 65 / 46 (2006.01) B65D 85 / 07 (2006.01) A61F 13 / 551 (2006.01) (54) Invention Title Packaging of Compressible Flexible Articles, Industrial Packaging Method Using the Packaging and Articles Thereon (57) Abstract The purpose of the invention is to provide a flexible, environmentally friendly and durable packaging bag, particularly for industrial packaging of diapers (3). Therefore, the present invention relates to a packaging bag (1) for diapers (3), comprising a sleeve (4): - formed from a single piece, preferably in a generally rectangular shape, with its opposing longitudinal edges (5, 6) joined together (56); - open at one end (8); - closed at its opposite end by a folded bottom (7); - the open end (8) is connected to the bottom (7) by two faces (11, 12), which are defined by two longitudinal fold lines (9, 10) and two end edges (13, 14), the end edges defining this open end (8); - one of these faces (11, 12) includes the opposing longitudinal edges (5, 6) of the sleeve (4), integrally joined together. The invention also relates to a bundle (24) of the bag (1). Another object of the invention is an industrial packaging method. Claims (2 pages), Description (7 pages), Drawings (9 pages), CN 121511196 A 2026.02.10 CN 1 21 51 11 96 A 1. Packaging bag (1), *Specifically for industrial packaging of compressible flexible articles (3), preferably arranged in at least one layer (2); * capable of changing between a flat state and an expanded state suitable for industrial packaging of these articles (3); * composed of a sleeve (4) - formed by a single piece, preferably in a generally rectangular shape, wherein the opposite longitudinal edges (5, 6) are integrally joined together (56); - open at one end (8); - closed at its opposite end by a folded bottom (7); - the open end (8) is connected to the bottom (7) by two faces (11, 12) defined by two longitudinal fold lines (9, 10) and two end edges (13, 14) that define this open end (8); - one of these faces (11, 12) includes the opposite longitudinal edges (5, 6) of the sleeve (4), which are integrally joined together. 2. The bag (1) according to claim 1, characterized in that, near at least one end edge (13, 14) of the face (11, 12), at least one element (15, 16) is provided for cooperating with at least one assembly member (25) to bundle a plurality of bags together to form a bundle (24), the element being preferably an eyelet (15, 16), and the assembly member for bundling the bags into a bundle (24) is preferably a roll-shaped fastener (25). 3. The bag (1) according to claim 1 or 2, characterized in that: * The folded bottom (7) is contained within an end segment (17) extending as an extension of the two faces (11, 12) and separated from them by a transverse fold line (18); * The end segment (17) includes two face sections (11e, 12e) which are extensions of the two faces (11, 12) of the sleeve (4) and are defined by the transverse fold line (18) and two longitudinal folds (13e, 14e), which are extensions of the two longitudinal fold lines (13, 14) of the two faces (11, 12) and are folded / moved toward the axis / longitudinal midplane (MLP) of the sleeve (4) to be substantially parallel and aligned with the transverse fold line (18); * Each longitudinal fold (13e, 14e) corresponds to the perpendicular bisector of the isosceles triangle (19, 20) of the bottom (7) in its unfolded and flattened state, the equal sides of which are fold lines (191, 192, 201, 202), such that the bottom (7) in its unfolded and flattened state comprises these two isosceles triangles (19, 20), their bases (193, 203) facing each other, and their principal vertices (194, 204) each located at the intersection of one of the longitudinal folds (13e, 14e) of the transverse fold line (18) or the end segment (17) with one of the longitudinal fold lines (13, 14) of the two faces (11, 12); * In the unfolded and flattened state of the bottom (7), in the longitudinal folds (13e, 14e) towards the sleeve (4) along the axis / longitudinal direction.In the case of planar midplane (MLP) movement / folding, the region (21, 22) of the bottom (7) comprising the vertices (195, 196, 205, 206) opposite the base sides of the two isosceles triangles (19, 20) folds toward the transverse fold line (18), the fold line (207) being parallel to the transverse fold line (18) to form two outer flaps (21, 22), which are secured to the corresponding face sections (11e, 12e) of the bottom (7) by at least a portion of their inner surfaces. 4. The bag (1) according to claim 3, characterized in that the bottom (7) is symmetrical with respect to the longitudinal midplane (MLP) and / or with respect to its transverse fold line (18). 5. The bag (1) according to any of the preceding claims, characterized in that certain portions of the bag (1) are integrally joined together by gluing and / or heat sealing. 6. The bag (1) according to at least one of the preceding claims, characterized in that it is at least partially composed of a material having at least one of the following properties: biodegradable, recyclable, compostable, bio-based, and non-allergenic, preferably composed entirely or partially of paper. 7. The bag (1) according to at least one of the preceding claims, characterized in that it is designed to be closed by the end edges (13, 14) / lips (27, 28) of the integral joint surfaces (11, 12), and along at least a portion of its length, preferably at each end where the end edges (13, 14) / lips (27, 28) of that portion are joined together, the gusset plates (29, 30) are advantageously formed by folding the end portions of each end edge (13, 14) towards themselves, inside to inside, and fixing them to form folds (271, 281) constituting the gusset plates (29, 30). 8. A bag (1) according to at least one of the preceding claims, wherein a compressible flexible article, preferably a diaper (3), is packaged, preferably in at least one layer (2). 9. A bag (1) according to claims 2, 7 and 8, characterized in that it has no elements (15, 16) intended to cooperate with at least one assembly member (25) to bundle together a plurality of bags (24) to form a bundle (24). 10. A bundle (24) of a bag according to at least one of claims 1 to 9, bundled together by at least one, preferably two, assembly members, advantageously a roll-shaped fastener (25), cooperating with eyelets (15, 16) formed in at least one end edge (13, 14) of the face (11, 12) of the bag (1). 11. An industrial packaging method for flexible articles (3), particularly compressible articles, which are preferably arranged in at least one layer (2), which are advantageously diapers (3), * wherein a bag (1) is used, preferably assembled into at least one bundle (24), * and wherein:- The bags (1) are used one by one, and are taken out one by one from the bundle (24) of the bags (1) when appropriate. - The bags (1) are inflated one by one. - The compressible flexible articles (3) are grasped, preferably in at least one layer (2). - They are then inserted into the inflated bags (1). - The end edges (13, 14) of the faces (11, 12) are then joined together as a whole, preferably by heat sealing. - And, optionally, the upper strip is cut off from the end edges (13, 14) of the faces (11, 12). Claims 2 / 2 pages 3 CN 121511196 A Packaging of compressible flexible articles, industrial packaging method using the packaging and articles thus packaged Technical Field

[0001] The technical field of the invention is industrial packaging, particularly the packaging of compressible flexible articles such as disposable diapers, bags made of environmentally friendly materials, such as paper bags, such as bags made of kraft paper or cardboard.

[0002] This invention relates to bags for packaging these compressible flexible articles, including empty bags and bags containing compressible flexible articles arranged in one or more stacked layers.

[0003] The invention also relates to bundling of these packaging bags.

[0004] The invention further relates to a method of industrial packaging of compressible articles in these packaging bags. Background Art

[0005] In addition to the fact that paper, kraft paper, and cardboard are biodegradable, compostable, and recyclable materials, and therefore environmentally compatible, compressing the flexible articles in their packaging to reduce the amount of packaging material used is also a positive factor for sustainable development.

[0006] However, encapsulating compacted flexible articles in paper or similar packaging imposes limitations in terms of mechanical strength, especially for industrial-scale packaging, such as at least 600 diapers per minute, as well as storage and transportation.

[0007] Equally important, such paper packaging should provide for quick and easy industrial packaging design in terms of filling, sealing, and stability, as well as the compact shape of the packaging containing the compressed flexible articles. This shape retention allows the packaged flexible items and the packaging to form a compact and robust unit, with no wrinkles, tears, or perforations.

[0008] Such paper packaging must be able to resist tearing caused by the expansion force exerted by the compressed flexible items it contains, and to resist external stresses that the packaging may be exposed to, such as water, moisture, heat, light, and impacts during handling. For this purpose, the paper wrapping layers in such packaging (e.g., bags) are typically chosen to have a total weight of 60 to 125 grams per square meter. In addition to the composition of the wrapping material, the structure of the bag must contribute to its mechanical strength (tensile strength, rigidity, toughness, tear strength).

[0009] Easy opening of the packaging is also a specification desired by consumers. In particular, it is desirable that such opening allows for easy removal of the packaged flexible items without tearing or damaging the packaging, so that the remaining items remain protected. However, there are limitations in this regard compared to fiber...There are technical difficulties associated with cellulose-based materials such as paper or similar materials, which tend to tear in a random and unpredictable manner along the cellulose fiber orientation. Using low-resistance perforated lines to guide the tearing when opening the packaging is difficult to manage. In fact, these low-resistance lines also have the disadvantage of weakening the packaging, risking premature breakage during storage, transportation, and various handling processes between the industrial packaging process and the consumer.

[0010] Naturally, another desirable feature of packaging made of paper or similar materials is that it is recyclable and biodegradable, particularly compostable in homes and industries, and allows for good print quality on its outer surface to make it attractive to consumers.

[0011] It is also desirable that the paper or similar materials used in this packaging are obtained from recycled materials and are easily recyclable after use.

[0012] The weight and cost of the packaging are also important factors that must be considered.

[0013] Therefore, there is a need for packaging bags for compressible flexible articles that meet the above specifications. The desired bags are made of flexible materials such as paper or similar materials. Cardboard, due to its rigidity, is not among the preferred paper materials considered. Specification 1 / 7 pages 4 CN 121511196 A

[0014] Objectives of the Invention In this context, the invention aims to achieve at least one of the following objectives.

[0015] One objective of the invention is to provide a flexible and environmentally friendly packaging bag, particularly for industrial packaging of compressible flexible articles, preferably arranged in at least one layer, the bag being able to change between a flat state and an inflated / expanded state suitable for industrial packaging of these articles.

[0016] One objective of the invention is to provide a flexible and robust packaging bag suitable for industrial-scale packaging of compressible flexible articles, for example at a rate of at least 600 per minute.

[0017] One objective of the invention is to provide a flexible packaging bag that is tear-resistant for handling, transporting and storing purposes.

[0018] One objective of the invention is to provide a flexible packaging bag for compressible flexible articles that is burst-resistant under the expansion pressure of the compressed articles.

[0019] One objective of the invention is to provide a flexible packaging bag, particularly for compressible flexible articles, that is heat-resistant, light-resistant, moisture-resistant, water-resistant and impact-resistant.

[0020] One object of the invention is to provide a flexible packaging bag, particularly a flexible packaging bag for compressible flexible articles, which is easy to open and provides easy access to the packaged articles after opening.

[0021] One object of the invention is to provide a flexible packaging bag, particularly a flexible packaging bag for compressible flexible articles, which is made of printable, recyclable and reusable materials.

[0022] One object of the invention is to provide a flexible packaging bag, particularly a flexible packaging bag for compressible flexible articles, which is lightweight and economical.

[0023] One object of the invention is to provide a set of flexible packaging bags mentioned in the above objects, which is intended for industrial packaging.These bags are supplied via a packaging line.

[0024] One object of the invention is to provide a fast, efficient and economical method for industrially packaging flexible articles, particularly compressible articles, which are preferably arranged in at least one layer and packaged in a flexible packaging bag as mentioned in the above object, advantageously diapers. Summary of the Invention

[0025] The invention satisfies at least one of the above objects and relates to a packaging bag*, particularly for industrial packaging of compressible flexible articles, which are preferably arranged in at least one layer (e.g., two or three layers); * capable of changing between a flat state and an expanded state suitable for industrial packaging of these articles; * composed of a sleeve - formed from a single piece, preferably in a generally rectangular shape, wherein the opposite longitudinal edges are integrally joined together; - open at one end ("open end"); - closed at its opposite end by a folded bottom; - the open end is connected to the bottom by two faces defined by two longitudinal fold lines and two end edges defining this open end; - one of these faces includes the opposite longitudinal edges of the sleeve, which are integrally joined together.

[0026] The face weld and longitudinal weld of the sleeve, as well as the folded bottom of the bag, are features that, along with other features, contribute to the functional and structural quality of the bag.

[0027] The bag is environmentally friendly, economical, robust, and perfectly suited to the requirements of high-productivity industries. Specification 2 / 7 pages 5 CN 121511196 A

[0028] Advantageously, near at least one end edge of the face of the bag, at least one element is provided to cooperate with at least one assembly member to bundle multiple bags together to form a bundle, the element preferably being a spool-like fastener, and the assembly member for bundling the bags together is preferably a spool-like fastener.

[0029] This arrangement helps to make the bag according to the invention a packaging solution specifically designed for packaging compressed flexible articles at an industrial rate of hundreds of bags per minute in one or more layers.

[0030] Preferably: * The folded bottom is contained within an end segment that extends as an extension of the two faces and is separated from them by a transverse fold line; * The end segment includes two face sections that are extensions of the two faces of the sleeve and are defined by the transverse fold line and two longitudinal folds that are extensions of the two longitudinal fold lines of the two faces and are folded toward the axis of the sleeve or the longitudinal midplane MLP so as to be substantially parallel to and aligned with the transverse fold line; * The longitudinal fold of each fold corresponds to the perpendicular bisector of an isosceles triangle in the unfolded and flattened state of the bottom, the equal sides of which are fold lines, such that the bottom in the unfolded and flattened state comprises two isosceles triangles whose bases are opposite each other, and whose principal vertices are each located at the intersection of the transverse fold line and the longitudinal fold line of one of the two faces, and at the intersection of the longitudinal fold line of the end segment;In its unfolded and flattened state at the bottom, with the longitudinal fold folded toward the sleeve axis, the bottom region comprising the opposite vertices of the base sides of two isosceles triangles folds toward the transverse fold line, which is parallel to the transverse fold line, to form two outer flaps fixed to the bottom face section, the fixing being achieved by at least a portion of its inner surface.

[0031] The folding and assembly of the bag bottom is the result of a unique and ingenious process combined with the face welding and longitudinal welding of the sleeve. Therefore, the bag's resistance to stresses caused by the expansion of compressed articles contained within it is significantly enhanced.

[0032] According to a significant feature of the invention, the bottom is symmetrical with respect to the longitudinal midplane and / or with respect to its transverse fold line.

[0033] According to an advantageous embodiment of the invention, certain portions of the bag are integrally joined together by gluing and / or heat sealing.

[0034] Advantageously, the bag according to the invention is at least partially composed of a material having at least one of the following properties: biodegradable, recyclable, compostable, bio-based, or non-allergenic. This material is preferably composed entirely or partially of paper, such as kraft paper.

[0035] To facilitate the insertion of compressed flexible articles into the expanded bag, according to a successful embodiment of the invention, at least a portion of the inner surface of its face is specified to be smooth, i.e., the coefficient of kinetic friction relative to these compressed flexible articles is between 0.01 and 0.25, preferably between 0.05 and 0.25.

[0036] This property can be obtained by applying a suitable coating and / or by physical and / or chemical surface treatment of the inner surface of the face.

[0037] After the compressed flexible articles are inserted into the expanded bag on the industrial packaging line, the closure of the bag becomes possible because the bag is designed to be closed by integrally joining (e.g., by gluing or heat sealing) the end edges of the face, with gussets provided at least a portion of its length, preferably at each end where the end edges of this portion are joined together. The gussets are advantageously formed by folding each edge end portion toward itself, inside to inside, and securing it such that the fold forming the gussets is secured in place.

[0038] The invention also relates to bags in which compressed flexible articles, preferably diapers, are packaged, preferably in at least one layer, for example in one, two, or three stacked layers, each layer containing 10 to 30 compressed flexible articles, such as diapers. Specification 3 / 7 pages 6 CN 121511196 A

[0039] The closed bag contains compressed articles and has undergone industrial packaging operations without any elements intended to cooperate with at least one assembly member (e.g., two) to bundle multiple bags together to form a bundle. In fact, the packaging operation includes the step of removing the upper portion of the bag, which is opposite the bottom and contains one or more assembly members.

[0040] According to another aspect of the invention, the invention relates to bundling of bags according to the invention, these bags being in a flat shape.In this bundle, the bags are bundled together by at least one, preferably two, assembly members, advantageously in the form of a roll fastener, engaging with eyelets formed in at least one end edge of the face of the bag.

[0041] The invention also relates to an industrial packaging method for flexible articles, particularly compressible articles, preferably arranged in at least one layer, which are advantageously diapers, * wherein the bags according to the invention are used, preferably assembled into at least one bundle, * and wherein: - the bags are used one by one, extracted one by one from the bundle of bags as appropriate, - the bags are inflated one by one, - the compressible flexible articles are grasped, preferably in at least one layer, - then inserted into the inflated bags, - then the end edges of the faces are integrally joined together, preferably by heat sealing; - and, optionally, the upper strip is cut from the end edge of the face.

[0042] Other features, details, and advantages will become apparent from the following detailed description of a preferred embodiment of the packaging bag according to the invention and from the analysis of the accompanying drawings, in which: [Figure 1] shows three perspective views A, B, and C of a closed bag according to the invention, which contains a compressed flexible diaper.

[0043] [Figure 2] shows a top view of the bag of Figure 1.

[0044] [Figure 3] shows a close-up view of the lower part of Figure 2.

[0045] [Figure 4] shows a view of one side of the bag according to the invention when flat.

[0046] [Figure 5] shows a view of another side of the bag according to the invention when flat.

[0047] [Figure 6] shows a close-up view of Figure 5, showing the bottom of the bag when flat.

[0048] [Figure 7] shows a close-up view of Figure 6, wherein the bottom of the bag is flat, partially degummed, and partially unfolded.

[0049] [Figure 8] shows a close-up view of Figure 5, showing the bottom of the bag when flat, completely degummed and unfolded on one side.

[0050] [Figure 9] shows a view of Figure 8 from the other side.

[0051] [Figure 10] shows a view of the bag bundle according to the invention. Detailed Description

[0052] Figures 1 to 3 show an embodiment of a packaging bag 1 according to the invention, which is closed and contains two stacked layers 2, each layer including 22 compressed diapers 3. Figures 4 to 9 show the state of the bag according to the invention when it is flat and open at the top.

[0053] In this specification, the terms "top", "bottom", "upper" and "lower" are relative to the bottom of the bag, which is located at the base or lower part of the bag.

[0054] Bag (1) Specification 4 / 7 pages 7 CN 121511196 A The bag 1 is composed of a sleeve 4 made of a recyclable, biodegradable and particularly compostable cellulose-based material. It is preferably kraft paper with a basis weight of, for example, 75 g / m². Except for this example, the bag is formed according to the inventionThe kraft paper of the bag can be between 60 and 120 g / m². In this example, the inner surface of the kraft paper is coated with a biodegradable, heat-sealable latex-based coating, which gives it a smooth surface to facilitate insertion into layer 2 of the compression diaper 3. The coefficient of dynamic friction relative to the compression flexible article is, for example, 0.08.

[0055] These latexes are advantageously selected from dispersions or emulsions of aqueous synthetic resins, preferably acrylic, vinyl, or styrene-butadiene resins.

[0056] The sleeve 4 is obtained as a single piece from an initial rectangular kraft paper sheet. In this embodiment, the sheet has dimensions of 600 mm x 832 mm. Two edges 5 and 6 correspond to two opposite end regions of the initial rectangular sheet along its width direction, which are integrally joined together by heat sealing or gluing, preferably heat sealing and gluing, for example by applying a latex adhesive coating to the inner surface of the kraft paper using a suitable tool on the packaging line. The heat sealing temperature is, for example, 180°C + / - 10°C. These longitudinal edges 5, 6 form a joint 56.

[0057] The sleeve 4 is the precursor of the bag 1, its lower end is closed by a folded bottom 7, and its upper end forms an open end 8, as shown in Figures 4 and 5.

[0058] In the flattened state shown in Figures 4 to 7, the bag 1 is formed by folding the sleeve 4 along two fold lines 9 and 10, which are parallel to the longitudinal edges 5 and 6. The bag has two faces 11 and 12, wherein the two upper edges 13 and 14 define the open end 8.

[0059] A joint 56 is located on face 11.

[0060] Two perforations forming eyelets 15 and 16 are made near the end edges 13 and 14 of the sleeve 4, one on each side of the joint 56. These eyelets 15 and 16 are each designed to mate with an assembly component, which may be, for example, a roll-shaped fastener 25: see Figure 10. Thus, multiple unexpanded bags 1 can be bundled into a bundle 24 (Figure 10). By using the bundles 24 of these uninflated bags 1, the operation of packing compressible flexible articles (diapers 3 in this example) into bags according to the invention can be efficiently supplied to the packaging line.

[0061] As shown in Figures 8 and 9, the folded bottom 7 is made of the lower end section 17 of the sleeve 4, which extends from two faces 11, 12, is separated from these faces by transverse fold lines 18, and is defined laterally by longitudinal folds 13e, 14e, which are extensions of the longitudinal fold lines 13, 14 of the two faces 11, 12. The extensions of the two faces 11, 12 forming the lower end section 17 constitute its face sections 11e, 12e.

[0062] Figure 6 shows the folded, glued, and flattened bottom 7, while Figure 7 shows the state of the bottom 7 before the final folding and final gluing, as specified by reference numerals 20 and 21. It can be seen that the folding causes each longitudinal fold 13e, 14e of the end segment 17 to move toward the axis or longitudinal midplane MLP of the sleeve 4, to a position where each of these 13e, 14e...One is perpendicular to the longitudinal fold lines 13 and 14 extending therefrom, and is parallel to and aligned with the transverse fold line 18.

[0063] Furthermore, each longitudinal fold 13e and 14e of the end segment 17 corresponds to the perpendicular bisector of the isosceles triangles 19 and 20 of the bottom 7 in the unfolded and flattened state (FIG. 7), whose equal sides are the fold lines 191, 192, 201, and 202 formed when the longitudinal fold lines 13e and 14e are folded toward the center of the sleeve 4. Therefore, the bottom 7 in the unfolded and flattened state shown in FIG. 7 includes two isosceles triangles 19 and 20, whose bases 193 and 203 are opposite each other, and whose principal vertices 194 and 204 are each located at the intersection of the transverse fold line 18 or one of the longitudinal folds 13e and 14e of the end segment 17 with the longitudinal fold lines 13 and 14 of one of the two faces 11 and 12.

[0064] In the flat, folded and glued bottom 7 shown in FIG6, where longitudinal folds 13e and 14e have been brought in / folded toward the axis or longitudinal midplane MLP of the sleeve 4, the regions 21, 22 (or final flaps) of the bottom 7 include vertices 195, 196, 205, 206 opposite to the base sides 193, 203 of the two isosceles triangles 19, 20, which have been folded toward the transverse fold line 18 and the longitudinal folds 14e, 13e, in fold line 207 parallel to the transverse fold line 18 and these longitudinal folds 14e, 13e to form two outer final flaps, which are secured to the corresponding face sections 11e, 12e of the bottom 7 by at least a portion of their inner surfaces.

[0065] The downward folded areas (final flaps) 21, 22 of the bottom 7 are at least partially and integrally fixed to their respective face sections 11e, 12e, for example by heat sealing or gluing, preferably heat sealing and gluing, for example by applying a latex adhesive coating to the inner surface of the kraft paper using a suitable tool on the packaging line. The heat sealing temperature is, for example, 180°C + / - 10°C.

[0066] Area 21 of the bottom 7 is partially folded over the face section 12e and partially folded over the area 22.

[0067] Bottom 7, regardless of: * Folded, glued, and flattened, as shown in FIG. 6, the longitudinal folds 13e and 14e move toward the axis or longitudinal mid-plane MLP of the sleeve 4, and the areas of bottom 7 (final flaps) 21 and 22 fold onto the face sections 11e and 12e; * Unfolded and flattened, as shown in FIG. 7, the longitudinal folds 13e and 14e move toward the axis or longitudinal mid-plane MLP of the sleeve 4, and the areas of bottom 7 (final flaps) 21 and 22 are not folded onto the face sections 11e and 12e; * Or unfolded and flattened, as shown in FIG. 8 or 9, the longitudinal folds 13e and 14e are not folded toward the axis or longitudinal mid-plane MLP of the sleeve 4.The plane MLP moves, and the bottom 7 regions 21 and 22 (final folds) are not folded over the face sections 11e and 12e; both are symmetrical with respect to the longitudinal midplane MLP and with respect to its transverse fold line 18.

[0068] Bundling (24) Figure 10 shows a bundle 24 of bags 1 in a flattened state, bundled together by roll-shaped fasteners 25 inserted into the eyelets 15, 16 of the stacked bags 1. Each of these fasteners 25 includes an axial tube 251. One end of the tube includes a flange 252, and the other end includes two radially resilient tabs 253, which are foldable to allow the axial tube 251 to pass through the eyelets 15, 16 of the bags 1 and to hold the stacked bags 1 on the axial tube 251 when returning to their rest position.

[0069] The packaging line is equipped with a tool that allows the bags to be picked up one by one from the bundle 24. To facilitate this operation, pre-cut lines 26 are provided between the eyelets 15, 16 and the two upper edges 13, 14.

[0070] Once the bag 1 is introduced into the packaging line, the inner surfaces of the lips 27, 28 on the two stacked layers 2 of the 22 disposable compressed diapers 3 are brought into contact with each other along most of their length and then heat-sealed / glued, preferably heat-sealed and glued, for example by applying a latex adhesive coating to the inner surface of the kraft paper using a suitable tool on the packaging line. The heat-sealing temperature is, for example, 180°C + / - 10°C.

[0071] As shown in Figures 1, 2 and 3, the lips 27, 28 extend from the edges 13, 14 of the flat bags, for example from bundles 24, which are folded and glued to themselves at their end portions to form gussets 29, 30 at each end. Each of these gussets includes folds 271, 281. The gussets 29, 30 facilitate opening the bag 1.

[0072] Finally, the lips 27, 28 and gussets 29, 30 of the closed bag 1 undergo a trimming operation on the packaging line. Therefore, they are shown in Figures 1, 2, and 3 as elements without any openings or designed to mate with assembly components (e.g., roll-shaped fasteners 25) to form bundles 24 of flat bags 1.

[0073] Method The invention also relates to an industrial packaging method for flexible articles, particularly compressible articles, which are preferably assembled in at least one layer 2, advantageously diapers 3.

[0074] The bags 1 used on the industrial packaging line are advantageously present in the form of bundles 24 comprising sixty bags 1.

[0075] The continuous industrial packaging line is, for example, of the type designed, manufactured, and sold by VIRE.

[0076] The bags 1 are extracted one by one from the bundles 24 of bags 1 by tools designed for this purpose on the industrial packaging line and conveyed along the line by a conveyor.

[0077] Another tool on the line inflates the bags 1 one by one.

[0078] Using a gripping tool, a compressible flexible article, such as a diaper 3, is gripped layer 2 and then inserted into an expanded bag 1. (See instruction manual, pages 6 / 7, CN 121511196 A).

[0079] The end edges 13, 14 / lips 27, 28 of faces 11, 12 are integrally joined together, preferably heat-sealed and glued, for example by applying a latex adhesive coating to the inner surface of the kraft paper using a suitable tool on the packaging line. The heat-sealing temperature is, for example, 180°C + / - 10°C.

[0080] The end edges 13, 14 / lips 27, 28 of faces 11, 12 are then trimmed using a cutting tool.

[0081] The sealed and trimmed bag 1 containing the diaper 3 is then collected for packaging in a large-capacity container.

[0082] Reference numerals in the accompanying drawings: bag 1, layer 2 of diaper 3, sleeve 4, longitudinal edges 5, 6 for closing sleeve 4, joint 56, bottom of bag 1, end opening of bag 1 8, fold lines 9, 10, surfaces 11, 12, upper edges 13, 14, lower end segment 17, transverse fold line 18, longitudinal folds 13e, 14e (extensions of longitudinal fold lines 13, 14), face segments 11e, 12e (extensions of surfaces 11, 12), isosceles triangles 19, 20, fold lines 191, 192, 201, 202 of isosceles triangles 19, 20, base sides 193, 203 of isosceles triangles 19, 20, principal vertices 194, 204 of isosceles triangles 19, 20, longitudinal midplane MLP. The bottom 7 includes regions 21 and 22, which include vertices 195, 196, 205, and 206 opposite to the base sides 193 and 203 of the two isosceles triangles 19 and 20; fold lines 207 for indenting / folding the bottom 7 regions 21 and 22; a bundle 24 of the bag 1 in a flat state; a roll-shaped fastener 25; an axial tube 251, a flange 252, and an elastic tab 253 of the roll-shaped fastener 25; a pre-cut line 26; lips 27 and 28 of the opening 8 of the bag 1; gusset plates 29 and 30; and folds 271 and 281 of the gusset plates 29 and 30. Instruction manual, page 7 / 7, 10 CN 121511196 A, Figure 1; Instruction manual, Figure 1 / 9, page 11 CN 121511196 A, Figure 2; Instruction manual, Figure 2 / 9, page 12 CN 121511196 A, Figure 3; Instruction manual, Figure 3 / 9, page 13 CN 121511196 A, Figure 4; Instruction manual, Figure 4 / 9, page 14 CN 121511196 A, Figure 5; Instruction manual, Figure 5 / 9, page 15 CN 121511196 A, Figure 6; Instruction manual, Figure 6 / 9, page 16 CN 121511196 A, Figure 7; Instruction manual, Figure 7 / 9, page 17 CN 121511196 A, Figure 8; Instruction manual, Figure 8 / 9, page 18 CN 121511196 A, Figure 10; Instruction manual, Figure 9 / 9Page 19 CN 121511196 A Summary of Packaging for Compressible Flexible Articles, Industrial Packaging Methods Using the Packaging, and Articles Thereof The purpose of the invention is to provide flexible, environmentally friendly, and durable packaging bags, particularly for industrial packaging of diapers (3). To this end, the invention relates to a packaging bag (1) for diapers (3), comprising a sleeve (4): - formed from a single piece, preferably in a generally rectangular shape, with its opposite longitudinal edges (5, 6) joined together (56); - open at one end (8); - closed at its opposite end by a folded bottom (7); - the open end (8) is connected to the bottom (7) by two faces (11, 12), which are defined by two longitudinal fold lines (9, 10) and two end edges (13, 14), which define this open end (8); - one of these faces (11, 12) includes the opposite longitudinal edges (5, 6) of the sleeve (4), integrally joined together. The invention also relates to a packaging (24) of bags (1). Another object of the invention is an industrial packaging method. Abstract PACKAGING FOR COMPRESSIBLE FLEXIBLE ITEMS, INDUSTRIAL PACKAGING METHOD USING SAME, AND ITEMS THUS PACKAGED The invention relates to providing a flexible, eco-compatible, strong packaging bag that is intended in particular for industrial packaging of diapers (3). To this end, the invention relates to a packaging bag (1) for diapers (3), consisting of a sleeve (4): - formed as a single piece, preferably of rectangular overall shape, the opposite longitudinal edges (5, 6) of which are rigidly connected to each other (56); - open at one of the ends thereof (8); - closed at the opposite end thereof, by a folded bottom(7); - the open end (8) being connected to the bottom (7) by two faces (11, 12) delimited by two longitudinal folds (9, 10) and two end edges (13, 14) that define this open end (8); - one (11) of these faces (11, 12) comprising the opposite longitudinal edges (5, 6) of the sleeve (4), rigidly connected to each other. The invention also relates to a bundle (24) of bags (1). The invention further relates to an industrial packaging method. Abstract

Claims

1. Packaging bag (1), * Specifically for industrial packaging of compressible flexible articles (3), preferably arranged in at least one layer (2); * It can change between a flat state and an expanded state suitable for industrial packaging of these items (3); * Composed of sleeve (4) - Formed from a single piece, preferably in a generally rectangular shape, wherein the opposite longitudinal edges (5, 6) are integrally joined together (56); - Open at one end (8); - It is closed at its opposite end by a folded bottom (7); - The open end (8) is connected to the bottom (7) by two faces (11, 12), which are defined by two longitudinal fold lines (9, 10) and two end edges (13, 14), which define the open end (8). - One of these faces (11, 12) (11) includes the opposing longitudinal edges (5, 6) of the sleeve (4), which are joined together as a whole.

2. The bag (1) according to claim 1, characterized in that, Near at least one end edge (13, 14) of the face (11, 12), there is at least one element (15, 16) intended to cooperate with at least one assembly member (25) to bundle a plurality of bags together to form a bundle (24), the element being preferably an eyelet (15, 16), and the assembly member for bundling the bags into a bundle (24) is preferably a roll-shaped fastener (25).

3. The bag (1) according to claim 1 or 2, characterized in that: * The folded bottom (7) is contained within the end segment (17), which extends as an extension of the two faces (11, 12) and is separated from them by the transverse fold line (18); * The end segment (17) includes two face sections (11e, 12e), which are extensions of the two faces (11, 12) of the sleeve (4) and are defined by the transverse fold line (18) and two longitudinal folds (13e, 14e), which are extensions of the two longitudinal fold lines (13, 14) of the two faces (11, 12) and are folded / moved toward the axis / longitudinal midplane (MLP) of the sleeve (4) so ​​as to be substantially parallel and aligned with the transverse fold line (18); * Each longitudinal fold (13e, 14e) corresponds to the perpendicular bisector of the isosceles triangle (19, 20) of the bottom (7) in its unfolded and flattened state, the equal sides of which are fold lines (191, 192, 201, 202), such that the bottom (7) in its unfolded and flattened state comprises these two isosceles triangles (19, 20), their bases (193, 203) facing each other, and their principal vertices (194, 204) are each located at the intersection of one of the longitudinal folds (13e, 14e) of the transverse fold line (18) or the end segment (17) with one of the longitudinal fold lines (13, 14) of the two faces (11, 12); * In the unfolded and flattened state of the bottom (7), when the longitudinal fold (13e, 14e) moves / folds toward the axis / longitudinal midplane (MLP) of the sleeve (4), the area (21, 22) of the bottom (7) containing the vertices (195, 196, 205, 206) opposite to the base of the two isosceles triangles (19, 20) folds toward the transverse fold line (18), the fold line (207) being parallel to the transverse fold line (18) to form two outer flaps (21, 22), which are fixed to the corresponding face sections (11e, 12e) of the bottom (7) by at least a portion of their inner surfaces.

4. The bag (1) according to claim 3, characterized in that, The bottom (7) is symmetrical with respect to the longitudinal midplane (MLP) and / or with respect to its transverse fold line (18).

5. The bag (1) according to any one of the preceding claims, characterized in that, Certain parts of the bag (1) are joined together by gluing and / or heat sealing.

6. The bag (1) according to at least one of the preceding claims, characterized in that, It is composed at least in part of a material having at least one of the following properties: biodegradable, recyclable, compostable, bio-based, and non-allergenic, and the material is preferably composed entirely or partially of paper.

7. The bag (1) according to at least one of the preceding claims, characterized in that, Its design is intended to be closed by the end edges (13, 14) / lips (27, 28) of the integral joint surfaces (11, 12), and along at least a portion of its length, preferably at each end where the end edges (13, 14) / lips (27, 28) of this portion are joined together, the gusset plates (29, 30) being advantageously formed by folding the end portions of each end edge (13, 14) toward themselves, inside to inside, and fixing them in order to form folds (271, 281) constituting the gusset plates (29, 30).

8. The bag (1) according to at least one of the preceding claims, wherein a compressible flexible article is packaged, preferably a diaper (3), preferably in at least one layer (2).

9. The bag (1) according to claims 2, 7 and 8, characterized in that, It has no elements (15, 16) intended to cooperate with at least one assembly component (25) to bundle multiple bags (24) together to form a bundle (24).

10. The bag bundle (24) according to at least one of claims 1 to 9, bundled together by at least one, preferably two, assembly members, advantageously a roll-shaped fastener (25), engaging with an eyelet (15, 16) formed in at least one end edge (13, 14) of the face (11, 12) of the bag (1).

11. An industrial packaging method for flexible articles (3), particularly compressible articles, which are preferably arranged in at least one layer (2), and these articles are advantageously diapers (3). * Wherein the bag (1) is used, it is preferably assembled into at least one bundle (24). * And among them: - The bags (1) are used one by one, and are taken out one by one from the bundles (24) of the bags (1) as appropriate. - The bags (1) were inflated one by one. - A compressible flexible article (3) is grasped, preferably in at least one layer (2), - Then it was inserted into the inflated bag (1), - Then the end edges (13, 14) of the faces (11, 12) are joined together as a whole, preferably by heat sealing; - Optionally, the upper strip is cut from the end edge (13, 14) of the face (11, 12).

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