Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
  • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
  • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
  • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
  • B31B70/20—Cutting sheets or blanks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
  • B31B70/74—Auxiliary operations
  • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/008—Standing pouches, i.e. "Standbeutel"
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D75/66—Inserted or applied tearing-strings or like flexible elements
  • B65D75/68—Inserted or applied tearing-strings or like flexible elements extending through wrapper closure or between wrapper layers

Definitions

• the invention relates to the field of flexible packaging, typically sachets. These sachets are formed from single or multi-layer strip materials, comprising wholly or in part plastic films. It relates more particularly to the opening of the sachets, in the case where the opening comprises the tearing of the strip material forming the sachet, the strip material constituting the sachet being chosen from manually tearable materials.
• such bags have, typically at their upper part, an opening zone comprising a tear primer or notch, typically in a "V" shape, so as to concentrate the tear energy at a localized point and thus initiate the tear of the material forming the sachet, and this with minimal manual effort.
• a tear primer or notch typically in a "V" shape
• the opening of the sachet requires in practice the use of a tear primer, such sachets being most often if not impossible, at least very difficult to open when a manual effort is exerted outside the tear primer , which is a guarantee of the integrity of the sachet throughout its lifetime.
• Tircell typically consisting of a strip with mechanical characteristics superior to those of the material to be torn, attached to the material to be torn, and comprising a free end allowing manual pulling on the strip and thus tearing said material.
• Pre-incision techniques are also known which tend to locally weaken a material, for example by laser, so as to facilitate the opening or tearing of a plastic film.
• the tear has a character which is most often random.
• the tear can propagate in a certain direction on one of the faces or walls of the bag, while it propagates in a completely different direction on the other face or facing panel.
• the Applicant has therefore sought a more efficient, reliable and high industrial productivity means for solving the problems posed by the state of the art, and in particular by the use of the laser.
• the packaging of a product forms a container comprising two side walls, a bottom and a filling opening, capable of being closed after packaging of the product in said packaging, said container being formed from a manually tearable material, typically in a plastic strip, and comprising a first opening zone provided with a tearing primer typically formed on an edge of said container for the first opening of said packaging a once filled and sealed, said border being typically formed by sealing the edges of the two side walls.
• each side wall comprises, typically facing and in parallel, at least one first stiffening element locally reinforcing said side wall and constituting, with said associated side wall, a main barrier to said typically continuous tear, said stiffening element being chosen so that the propagation energy of said tear is less than the breaking energy of said main barrier, so that said main barrier constitutes a partition line of said packaging, with an upper part intended to be torn, in whole or in part, during said first opening, and a lower part intended to serve as a container for said product, b) said tear leader is located, in whole or in part, in said upper part and at a distance from said first stiffening element typically less than 10 mm, c) each side wall comprises means for guiding said tear during said first opening, so that said tear can only deviate from said first stiffening element by at most 20 mm.
• the Applicant has observed on the one hand that the presence of a first stiffening element could in a way form a barrier delimiting two zones (the so-called upper part and the so-called lower part), in such a way that an initiated tear in one zone was not propagated in the other zone, and that by choosing for the stiffening element mechanical characteristics, in particular a resistance to tearing, superior to those of the material forming the packaging.
• the tear being typically initiated in the upper part, as opposed to the lower part corresponding to the part of the packaging containing the packaged product, this means makes it possible to guarantee the integrity of the lower part, so that the risk of seeing the product spread when the sachet is opened is thus eliminated.
• the Applicant has observed that it was possible to limit the hazards encountered during the opening of a sachet by using in addition a guide means so as to "channel" the tear - tear formed in a way. from a primer close to said first stiffening element in the upper part or at the limit between the upper and lower parts - without it being necessary to assign to the tear a strictly predetermined or precisely determined trajectory, the goal being that the final consumer can open the sachet in a single gesture, without using any accessory, so as to obtain the result simply expected.
• the combination of means a) to c) can be applied to all types of sachets, including sterilizable sachets, its implementation resulting in either negligible or low additional cost depending on the precise natures of the stiffening element and of the chosen guide means.
• Figures la to 15c relate to the invention.
• Figures la, le, ld, 2a, 2c, 3a, 4a, 6, 9, 10 and 12a are schematic views of rectangular bags (1) with side view of a wall (2) - to illustrate the relative position of said stiffening element (5), of said tearing primer (4), and the presence of said guide means (6).
• Figures la, ld, 2a, 3a, 4a and 5 relate to sachets (1) with filling opening (13) unsealed and therefore ready to be filled, while Figures le, 2c, 5 and 6 are relative to bags closed after filling, with sealed filling border (14).
• Figures 1b, 2b, 3b, 3c and 4b are sectional side walls (2, 2 ') of the bags (1) at said first stiffening element (5) and possibly said guide means (6).
• Figure la represents the bag (1) before filling.
• Figure lb is a section along A- A of Figure la.
• the figure shows the bag (1) after filling and closing the bag.
• Figure 1d similar to Figure la, shows the bag (1) in which the filling opening (13) is perpendicular to the side (15) of the first opening of the bag.
• Figures 2a to 2c relate to another embodiment of the invention in which the stiffening element (5) is a wire (50) and in which said guide means (6) is constituted by a wire forming said second stiffening element (61).
• Figure 2a shows the bag (1) before filling.
• Figure 2b is a section along AA of Figure la.
• Figure 2c shows the bag (1) after filling and closing the bag.
• Figures 3a to 3c relate to other methods of the invention.
• FIG. 3a represents a bag (1) in which the filling opening (13) corresponds to the entire section of the bag, while said upper part (11) corresponding to the part of the bag torn during its first opening represents only the right corner of the bag.
• the stiffening element (5) and said second stiffening element (61) are formed by localized deposits (53).
• the stiffening element (5) and said second stiffening element (61) are formed by extra thicknesses (54) of the material forming the walls (2,2 ′).
• Figure 4a is similar to Figure 3a, but the stiffening element (5) and said second stiffening element (61) are formed by a single strip (52) fixed to the surface of each wall (2, 2 ') comprising a central weakening line (520).
• Figure 4b is a section along A-A of Figure 4a.
• FIG. 5 represents a bag (1) in which the stiffening element (5) is formed by a wire (50), and in which said second stiffening element (61) is formed by the sealing edge (14) typically "reinforced "(62) by pleating.
• FIGS. 7a to 8 schematically illustrate two methods of manufacturing the strip material (7) in the form of a coil (72), intended to form the bags (1) with insertion of the stiffening element (5) and of the guide means ( 6) constituted by a wire (50).
• the strip (7) is formed by extrusion or assembly of two layers (70).
• FIG. 7a is a perspective view of the strip material (7), the wires (50) being parallel to the machine direction MD of the material.
• dotted lines (71) diagrammatically cut the walls (2,2 ') in order to form sachets
• Figure 7b is a cross-sectional view before the two layers (70) between which the wires (50) are placed, to form a strip material (7), as shown schematically in the sectional view of Figure 7c.
• Figure 8 is similar to Figure 7a, but the wire is no longer rectilinear, thanks to a transverse movement of the wire (50) upstream, synchronized with the longitudinal movement in the direction MD.
• Figure 9 is similar to Figure le, but the bag (1) is formed by folding along a fold line (16) corresponding to the bottom (17) of the bag.
• Figure 10 is similar to Figure le, but the stiffening element (5) consists of a label (51), which can be optionally printed and / or metallic.
• FIG 11 shows, in perspective, the bag (1) of Figure 10 after opening and separation of the upper part (11), and manual pressure on the edges (19), so as to elastically separate the two labels (51) and thus release the first opening orifice (15).
• FIG. 12a represents a bag (1) in which said stiffening element (1) and said second stiffening element (61) are formed by a label (55), which can optionally be printed and / or metallic, comprising a line of weakness (550) forming said partition line, comprising at its ends the tear caps (4).
• a label 55
• 550 line of weakness
• FIG. 12b represents a vertical cross section of the sachet according to FIG. 12a, after opening and separation of the upper part (11), and reclosing by using a foldable label (55), typically metallic and printed, for example in aluminum or comprising aluminum.
• a foldable label typically metallic and printed, for example in aluminum or comprising aluminum.
• FIG. 12 relates to the production of the strip material (7) PET / A1 // PP between the layers of which PA 616 wires are inserted between the layers of PET / Al and PP.
• Figure 13 is similar to Figure 12, but relates to the manufacture of the material
• Figure 14 is similar to Figure 3, but the wire is coated with glue (73) before being inserted between the layers of PET and Al / OPP / PP.
• Figures 15a to 15c illustrate the manufacture of a strip material (7) in which the stiffening element (5) is a wire (50) arranged in the transverse direction TD, perpendicular to the machine direction MD.
• FIG. 15a is a schematic view, in longitudinal section perpendicular to the strip material (7) to be produced, of a device for laminating two films (70) using an adhesive (73), a wire (50) being deposited over the entire width of the strip at regular intervals, so as to obtain a material according to FIG. 15b (top view), then, after removal of the portions of wire external to the material, a material according to FIG. 15c , similar to Figure 15b.
• Figure 16 shows in section two side walls (2) and (2 ') shown face to face before welding to form a bag, two upper strips (51) forming said guide means (6,61), two lower strips forming said stiffening element (5).
• said guide means (6) can comprise, on each side wall (2, 2 ′), and typically in parallel, a second stiffening element (61) constituting a secondary barrier to tearing , typically parallel to said first stiffening element forming said main barrier, said primer being located between said main and secondary barriers, so as to maintain said tear between said first stiffening element and said second stiffening element during said first opening.
• Said first and second stiffening elements forming said main and secondary barriers are preferably identical, continuous, parallel and spaced apart by a distance typically ranging from 1 to 20 mm, and preferably from 2 to 10 mm; they can optionally form a wire (50), a strip (52) or label (55) fixed to said face and having a weakening line (520, 550) typically obtained by mechanical or laser pre-cutting, said strip or label on one side (2) facing said strip on the other side (2 ').
• said partition line which generally runs along or merges with the line formed by the first stiffener (5), can be a line ensuring complete separation of said upper (11) and lower (12) parts. ). Indeed, it is generally more practical or aesthetic that it is so, but this in itself is in no way obligatory.
• this partition line is often advantageous for this partition line to be a transverse line, so as to ensure total opening of said bag, as illustrated for example in FIGS. 1a to 2c.
• this partition line it is possible to have a partial opening, as illustrated in FIGS. 3a to 4b.
• Said first stiffening element (5, 50, 51, 52, 53, 54, 55) forming said barrier should be chosen by its nature, its mechanical characteristics or its thickness, so that the propagation energy of said tear is typically at least 20% higher at the crossing of said main barrier (5 ') than in the strip material (7) without stiffening element.
• the energy of propagation from the tear to the crossing of said main barrier (5 ') comprising said first stiffening element (5), or of the secondary barrier comprising said second stiffening element (61), can be much greater, at least twice greater, or even five times greater and even more in some case, with the propagation energy of the tear in the strip material itself, so that it becomes almost impossible that, on the first opening, the tear can get lost outside the "track" which was assigned when the packaging was designed.
• FIG. 3 c illustrate the case where said first stiffening element is constituted by an added element, typically by a wire (50) or a strip (51) secured to said side walls (2, 2 ').
• Said thread (50) can be a textile thread made of natural, artificial or synthetic material, or a metallic thread, said thread having a breaking strength of at least 0.5 N.
• said strip (51) may be a strip of paper, or of metal, or of monolayer or multilayer plastic material, and optionally printed.
• said first stiffening element (5) forming said barrier can consist of a relief pattern (53) typically obtained by localized deposition of material, for example by printing, so as to form a thick relief typically ranging from 20 to 200 ⁇ m, and thus locally increasing the thickness of said strip material by at least 20%.
• a relief pattern (53) typically obtained by localized deposition of material, for example by printing, so as to form a thick relief typically ranging from 20 to 200 ⁇ m, and thus locally increasing the thickness of said strip material by at least 20%.
• said first stiffening element can consist of an additional thickness (54) of the material constituting said face (2, 2 ′), typically formed by punching or by extrusion of said typically plastic material.
• said strip material (7) can be a multilayer material, said first stiffening element (5, 50, 51) being inserted between two layers (70) of said multilayer material, the two layers possibly being different or identical.
• Said strip material (7) may comprise at least one layer (70) of extruded thermoplastic material or at least two layers (70) of co-extruded thermoplastic material, or at least two layers (70) of complexed strip material, said stiffening element typically oriented in the "machine" MD direction of the strip material (70), as illustrated in FIGS. 7a to 8 and 12 to 14 where the stiffening element is a wire, but possibly in the "through” direction TD , as shown in Figure 15c.
• the packaging according to the invention can typically be formed either from two strip materials (7), identical or different, by cutting the two strip materials, each forming a side wall (2, 2 ') of said packaging, and sealing the edges to form a sealed border (3), either from a single strip material, by folding, sealing and cutting, one side of said packaging forming a fold (15).
• Said sealing may typically be a heat sealing including compression of the edges, in particular so that each end of said member stiffener (5, 50, 51) is coated by said strip material (7) by localized creep of said strip material, so as not to affect the sealing of the packaging.
• said strip material (7) can be chosen from - or can comprise - one or more of the following materials: paper, metal foil typically made of aluminum, film or a layer of oriented PET, PA, PP, PE or bi-oriented, possibly metallized, said material having a thickness comprised between 20 and 200 ⁇ m, said strip material being a material comprising from 1 to 5 layers (70).
• a tearable PE When taking PE, it is preferable to take a tearable PE with a thickness at least equal to 60 ⁇ m.
• the packaging can comprise, as illustrated in FIG. 12b, an attached bottom (18), so as to have a standing-up packaging.
• said first stiffener element (5) may have characteristics chosen on the basis of its ability to fold / unfold to allow reclosure of said packaging after said first opening. We can take for this a metal strip, typically aluminum, which can also be printed.
• a particular object of the invention consists of a bag, typically with rectangular faces (2, 2 ') of multilayer material, typically comprising 2 to 4 layers, said first stiffening element on each face (2, 2') being opposite and constituted by a textile thread, typically made of PET or PA, parallel to said opening (13), and typically at a distance from this border of between 5 mm and 30 mm, so that said upper part (11) has , relative to said lower part, a small relative surface, typically less than 0.2 times the surface of said lower part.
• such a sachet can have its filling opening (13) in said upper part, as illustrated on most of the sachets represented in the figures, or in said lower part (12), as illustrated in FIG. 5, or also laterally as illustrated in FIG. 1d where the filling opening is perpendicular to the partition line formed by said main barrier.
• Said first stiffening element (5) can also be located on the interior and / or exterior face of said wall (2,2 ′).
• the invention also makes it possible to obtain all kinds of combinations depending on whether one considers the other face, the first stiffening element (5) or the second stiffening element (61).
• the first stiffening element (5), and optionally said guide means can be constituted by or comprise a strip (51, 52), for example in the form of a typically extruded profile, as illustrated in FIGS. 10, 11, 16
• said strip (51, 52) it may be advantageous for said strip (51, 52) to also comprise a closing means, the strip on one side typically comprising a closing element cooperating with a complementary closing element, facing it. on the other side, said closure means being typically of the "ZIP" type and located below said first stiffening element in said lower part (12).
• the packaging according to the invention may comprise a closing means, a face (2) typically comprising a closing element cooperating with a complementary closing element, opposite, of the other face (2 '), said closure means being typically of the "ZIP" type and located below said first stiffening element in said lower part (12).
• Another object of the invention consists of a method of manufacturing a packaging according to the invention in which: a) all or part of said strip material is formed by extrusion or co-extrusion, lamination or laminating ( 7) and in which this material is made integral, during said extrusion or co-extrusion, lamination or laminating, said first stiffening element (5, 50, 51) and, where appropriate said second stiffening element (61), said first stiffening element, and possibly said second stiffening element, being supplied, unrolled typically in the machine direction MD of the strip of material (7) and driven (s) by the advancement of said material.
• said container (1) is typically formed by forming a sealed border (3) of the faces (2, 2 ') formed from two strips of material (7) or from a single strip by folding, possibly forming said tear leader (4), and cutting said container.
• said first stiffening element (5) and where appropriate said second stiffening element (61), can (can) be coated or typically coated with glue or adhesive so that '(s) is (are) completely integral with said strip material (7) and that there is no risk of delamination and risk of loss of sealing of the packaging or increase in the permeability of the packaging.
• first stiffening element (5) and the second stiffening element (61) are compatible with the materials forming said strip material (7), but, with a choice of suitable glue or adhesive, it is virtually possible to adhere any type of first stiffening element (5) and second stiffening element (61) to said strip material (7).
• the first (5) and / or second (61) ) stiffener element a thickness ER typically small compared to the thickness of the strip material. (7) Es - for example at least 4 times lower or even 8 times lower (10 ⁇ m vs 80 ⁇ m).
• a thickness ER typically small compared to the thickness of the strip material.
• (7) Es - for example at least 4 times lower or even 8 times lower (10 ⁇ m vs 80 ⁇ m).
• a strip (51, 52), or a label (55) when, for example, a strip (51, 52), or a label (55) is used, its thickness may, if necessary, be close to that of the strip material.
• said first stiffening element (5) and said second stiffening element (61) can advantageously be identical and be formed simultaneously, the strip material (7) being able to be oriented or not.
• said strip material (7) can be chosen from the following multilayer materials: PET / PP, PET / A1 / PP, PET / A1 / OPA / PP, PET / A1 / PE, PET / A1 / OPA / PE, PET / OPA / A1 / PE, PET / PE, OPP / PE, OPP / PP, OPP / OPP, OPA / PP, OPA / PE, where "Al” (also known as “alu” or "ALU” in the figures) designates thin aluminum foil, typically less than 20 ⁇ m, where OPP and OPA denote oriented PP and PA respectively, "/" symbolically denoting the separation between distinct layers .
• said supplied strip material may comprise said first stiffening element (5) oriented in the transverse direction TD, perpendicular to the machine direction MD of unwinding of said strip material.
• FIGS. 15a to 15c illustrate a way of industrially manufacturing a strip material comprising a thread oriented not in the machine direction, as in FIG. 7a, but in the cross direction. We have shown, in dotted lines, in Figures 15b and 15c, the possibility of having a second wire forming the second stiffening element (61).
• said supplied strip material not comprising said first stiffening element (5), said first stiffening element (5), and possibly said guide means (6) if necessary is formed or applied to the faces ( 2) and (2 ') during the implementation of said FFS process.
• said first stiffening element (5) - and possibly said guide means (6) if necessary - can be a strip applied to the inside of said container, so that nothing is visible from the outside, and / or so that the outer surface of the bag is smooth.
• FIG. 16 illustrates this possibility of a sachet, where the two side walls (2) and (2 ′) are shown before face-to-face welding, the two upper strips (51) forming said guide means (6,61), both lower strips forming said stiffening element (5). All these strips can be fixed to the side walls either during the manufacture of said strip material, or during the manufacture of said container.
• Another object of the invention consists of the strip material or film (7) intended for implementing the method according to the invention.
• This material or film intended for use on automatic filling machines of the FFS type, comprises said first stiffening element (5), and optionally said guiding means, said first stiffening element (5), and possibly said guiding means, being oriented in the machine direction MD or in the cross direction TD.
• This film can be obtained, as already indicated by different technologies including lamination.
• the stiffening element (5) and the guide means are typically introduced during lamination, preferably between the two films forming the layers (70). According to one modality, their positioning in the width of the strip material is adjustable, and the functionality will be obtained in the longitudinal direction or MD machine. It is of course possible to introduce as many stiffening elements or guide means as necessary on the width of the strip material (7), in order to: - guide the tear, - and / or meet the needs of several poses which will be cut later,
• the strip material (7) comprises only two wires (50).
• the invention finds an application in the packaging of all types of products, whether for example food products, cosmetic products, or even maintenance products.
• PET / A1 / PP with a thickness of 12 ⁇ m / 9 ⁇ m / 90 ⁇ m, PET / A1 / OPA / PP described in FIGS. 12 to 14, and PET / PE, and LDPE of 80 ⁇ m.
• Tests have also been carried out using as the first stiffening element (50) a metal wire or "anti-theft" strip designed to alert, typically trigger a ring, in the event of fraudulent passage between the gates of cash registers in stores.
• Reclosable sachets have also been made using as a first stiffening element (5), on each face, an aluminum strip 40 ⁇ m thick and 20 mm wide, or by incorporating a "ZIP" type closure. All the bags produced have been tested by a panel of people representing "average consumers", the opening of the bags having to be carried out without particular attention, as in everyday life.
• the invention has numerous advantages.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Bag Frames (AREA)
• Supplying Of Containers To The Packaging Station (AREA)
• Making Paper Articles (AREA)

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• 2001
  • 2001-11-28 FR FR0115383A patent/FR2832698B1/fr not_active Expired - Fee Related
• 2002
  • 2002-11-20 AU AU2002364791A patent/AU2002364791A1/en not_active Abandoned
  • 2002-11-20 DE DE60219688T patent/DE60219688T2/de not_active Expired - Lifetime
  • 2002-11-20 US US10/495,436 patent/US20050031232A1/en not_active Abandoned
  • 2002-11-20 ES ES02801072T patent/ES2286329T3/es not_active Expired - Lifetime
  • 2002-11-20 AT AT02801072T patent/ATE359972T1/de not_active IP Right Cessation
  • 2002-11-20 EP EP02801072A patent/EP1458627B1/de not_active Expired - Lifetime
  • 2002-11-20 WO PCT/FR2002/003966 patent/WO2003045816A2/fr active IP Right Grant

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