EP3212028B1 - Closure device with hooks in hooks having sensory effect - Google Patents

Closure device with hooks in hooks having sensory effect Download PDF

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Publication number
EP3212028B1
EP3212028B1 EP15786936.3A EP15786936A EP3212028B1 EP 3212028 B1 EP3212028 B1 EP 3212028B1 EP 15786936 A EP15786936 A EP 15786936A EP 3212028 B1 EP3212028 B1 EP 3212028B1
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EP
European Patent Office
Prior art keywords
hooks
force
local maximum
curve
elements
Prior art date
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Application number
EP15786936.3A
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German (de)
French (fr)
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EP3212028A1 (en
Inventor
Arnaud Thierry Jean-Marie FREULON
Anthony Bertrand Patrick MAHE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aplix SA
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Aplix SA
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Publication date
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Priority to PL15786936T priority Critical patent/PL3212028T3/en
Publication of EP3212028A1 publication Critical patent/EP3212028A1/en
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Publication of EP3212028B1 publication Critical patent/EP3212028B1/en
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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/24—End- or aperture-closing arrangements or devices using self-locking integral or attached closure elements, e.g. flaps
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0046—Fasteners made integrally of plastics
    • A44B18/0061—Male or hook elements
    • A44B18/0065—Male or hook elements of a mushroom type
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0003—Fastener constructions
    • A44B18/0007—Fastener constructions in which each part has similar elements
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0003—Fastener constructions
    • A44B18/0015—Male or hook elements
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
    • A44B18/0046—Fasteners made integrally of plastics
    • A44B18/0053—Fasteners made integrally of plastics in which each part has similar elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • 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
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/02—Wrappers or flexible covers
    • B65D65/04—Wrappers or flexible covers non-rectangular
    • B65D65/08—Wrappers or flexible covers non-rectangular with fastening elements, e.g. slide fasteners

Definitions

  • the present invention relates to a bag, in particular a flexible material, having an opening and comprising a hook-and-hook closure device in hooks comprising a first element consisting of a first base band and first hooks projecting from this first base band and a second element consisting of a second base band and second hooks projecting from the second base band, the first and second hooks intermeshing each other to close the opening.
  • the present invention also relates to a self-gripping closing device of this kind for a bag.
  • the self-gripping closing devices described have the advantage of offering great flexibility in the closure, which makes them particularly suitable for flexible bags.
  • closure devices of the prior art have the disadvantage that when the user closes the bag by pinching the closure device between two fingers and sliding them along the closure, he does not receive any sensory feedback. with regard to the proper closure of the bag and may have the impression that the bag has not been properly closed. In addition, once the system closed between his fingers, the user must close the rest of the bag by sliding his fingers transversely along the closure.
  • the zip type products of the prior art give no signal that the bag is always closed, the sliding closing force being almost constant throughout the closure and the same whether the bag closes or not, even that a number of situations can cause a zip closure system to get out of its tracks: pollution, a misplaced food, a relative poor positioning of the two bands facing each other, etc. It follows that it would be highly desirable for the user to feel that he closes the bag properly and always not only at the pinch but also during the sliding.
  • the present invention aims to provide a closure device for a bag of the above kind, which while simple to manufacture and retains excellent flexibility, allowing if desired a perfect adaptation to flexible bags, gives addition to the user a sensory feedback regarding the closure of the bag and in particular the assurance that the bag has been properly closed, especially by pinching it between two fingers, as well as when sliding to close the rest of the bag.
  • a device for closing an opening of a bag, in particular of flexible material is as defined in claim 1, the subclaims defining advantageous improvements and / or preferred embodiments.
  • At least one of the hook members has hooks from a base band, each hook having a stem portion and a head portion projecting laterally from the stem portion, and the arrangement is such that when the two elements meshing with each other, the highest point of the head of each hook of said at least one of the attachment elements remains at a given distance from the base band of the other hook element.
  • the ratio of the distance e given on the height h of the rod is between 10% and 70%, especially between 20% and 50%.
  • the two hook elements each comprise a base band and hooks from the respective base band, each hook element having a rod portion and a projecting head portion. laterally of the rod portion and, when the bag is closed, the highest point of each hook of one of the hook members remains at a distance from the base band of the other hook member and vice versa.
  • the hooks of at least one of the two hook elements are arranged in a plurality of rows and the distance between two adjacent hooks along a row is greater than or equal to the respective dimension of the hooks measured along said row.
  • the hooks of at least one hook element are identical to each other.
  • the hooks of the two hook elements are identical to each other.
  • each hook has two wing-shaped right and left hooking parts projecting laterally from a rod.
  • the hooks are arranged in a plurality of rows and the wing-shaped attachment parts extend in a direction transverse to the direction of the rows respectively in the opposite right and left directions.
  • the hooks are arranged in a plurality of rows, and each hook of at least one element, in particular of the two elements, is delimited over its entire height, that is to say from the base web to its top, by two mutually opposed flat surfaces transverse to the direction of the at least one row of hooks, the two flat surfaces being formed in particular by a cut.
  • one of the two hook elements comprises a rail comprising a base portion and a lateral hooking portion which extend over an entire row.
  • a plastic bag 1 has an opening 2 delimited by a first edge 3 and a second edge 4 joining at a first end point and a second end point 6.
  • Each of the edges 3 and 4 respectively comprises, fixed in particular by gluing or any other means (thermal welding or the like, etc.), strips 7 and 8 with respective hooks, such as those shown in FIG. figure 1 .
  • Each strip consists of a hooked central portion, delimited on either side by two longitudinal edge portions 20. However, it is also possible to provide only one edge of a single side or even no edge.
  • the hook strips 7 and 8 are made of a conventional thermoplastic material, such as polyethylene, polypropylene, polyester, or a biodegradable material such as PBS, PLA, etc. They each comprise a plurality of hooks 9, each delimited by two lateral surfaces 12 and each having a rod 10 of substantially rectangular parallelepiped shape. The hooks are arranged in rows parallel to each other.
  • the lateral surfaces 12 here extend perpendicularly to the direction of extension of the rows. They could also be inclined for example by an angle ⁇ of 1 to 35 ° with respect to the perpendicular to the direction of the rows, as in a variant shown in FIG. figure 8 .
  • the hooks of a row are slightly offset in the direction perpendicular to the row direction relative to the hooks of the neighboring row, in particular with a distance Q of between 0.1 mm and 0.7 mm, plus especially between 0.2mm and 0.5mm.
  • the distance between two successive hooks in a row is greater than or equal to the thickness of each hook measured in the same row direction.
  • the two lateral surfaces 12 are flat, corresponding to the fact that they were formed by knife attack as in the method well known in the art under the name De Navas or Repla process described for example in the US patent US Patent 4,056,593 .
  • the head and the stem of each hook are both delimited on both sides by these two flat lateral surfaces.
  • the hooks could be made in another way and in particular one could instead form fungi or hooks single head.
  • hook flanges 13 and 14 protrude laterally on either side in the direction perpendicular to the direction of the rows of the crown portion of the rod 10. These flanges 13 and 14 form the hooking part of the hook. In the same row, the hooks are arranged at a distance from each other. This inter-hook distance, as measured by the distance at the base web of the rod between the flat lateral surfaces 12 mutually facing each other of a hook and its immediate neighbor in the same row, is measured along the direction of the row and is designated by d. This distance d is here for example greater than or equal to f, thickness of the hook.
  • the uppermost point 21 of the hooks of the hooked strip 7, when the hooks mesh with each other with the hooks of the other hooked strip 8, is at a non-zero distance e from the base of the hook. other 8 base band.
  • the highest point 21 (less than the figure) of the hooks of the strip 8 hooks is at a non-zero distance from the base of the base strip 7, including the same distance e non-zero.
  • the dimensions of the hooks may notably be the following:
  • the thickness f can be between 0.1mm and 2.0mm, more particularly between 0.2mm and 0.65mm.
  • the height h may be between 0.4 mm and 1.5 mm, more particularly between 0.9 mm and 1.3 mm, preferably of the order of 1 mm or even more preferably of the order of 1.1 mm.
  • the distance between the highest point of the head and the opposite base strip may be between 0.2 mm and 0.4 mm, or as a percentage of the height of the hooks, is according to the invention always between 10% and 70%, especially between 20% and 50%.
  • the thicknesses of the base strips may be between 0.07 mm and 1 mm, in particular less than 0.5 mm and preferably of the order of 0.1 mm.
  • the density of the hooks can be between 10 and 500 hooks / cm 2 , in particular between 50 and 250 hooks / cm 2 .
  • the following test is carried out on the closure of the figure 3 comprising the two hooked strips 7 and 8.
  • the two strips 7 and 8 are fixed (on the side without hooks) respectively to a stationary frame and a frame movable facing each other, for example by gluing, to prevent the sliding of the two strips. or ribbons, for example using a double-sided adhesive tape.
  • the hooks of the two hook ribbons are, on end portions, engaged or clipped. each other, while on a central portion having an extension substantially equal to the width extension of the useful part of compression of the movable frame, they are at a distance from each other (see Figure 5A ).
  • the moving frame is then moved towards the stationary frame, in particular at a speed of approximately 100 mm / min.
  • the compressive force applied to the closure consisting of the two ribbons as a function of the displacement is measured by means of a load cell of 100 N provided with, for example, the mobile frame.
  • a curve is obtained as shown in Figures 4A, 4B , 4C or 4D where the x-axis indicates a displacement in millimeters (mm) and the y-axis a force in Newtons (N).
  • This curve is increasing from a point A to a point B forming a first local maximum which corresponds to the point of passage of the head of the hooks of the band secured to the movable frame beyond the heads of the hooks of the another band attached to the lower stationary structure.
  • the curve then decreases to a local minimum C which corresponds to the moment when the upper point of the heads of the hooks of the upper ribbon comes into contact with the bottom of the opposite counterpart.
  • the curve then increases, corresponding to a crushing of the two bands against each other.
  • the abscissa from which the curve starts to grow from zero is variable depending on the initial spacing of the mobile and stationary frames. So, to achieve the Figures 4A , 4C and 4D , the operator is from a starting gap between the frames larger than to achieve the Figure 4B . However, the shape of the curve from the point where it begins to grow is identical and does not depend on this initial spacing, nor the abscissa of this starting point.
  • a closure which provides the user with sensory feedback that the closure is in place and ready to close.
  • This is a definite advantage because it avoids an immediate closure which in some cases requires reopening the package when the closure is in an unsuitable position.
  • this characteristic contributes to a great extent to the perceived quality of the closure by the user.
  • This characteristic corresponds to the low slope section AB of the compression curve of the Figures 4A to 4C , the entire closure system being balanced. The appearance of this feature has been enabled by a particular design of the system.
  • the closure is composed of a plurality of elements independent of each other having sufficient flexibility to reposition themselves relative to each other.
  • a user of a closure needs to feel that the closure has occurred, to reassure him about the effectiveness of the closure.
  • the inventors have therefore sought to create a particular feeling for the user in the form of a "click” effect, a "click” not auditory but in the sense of touch.
  • W AB under the curve between points A and B namely that E BD must be greater than 0.70 times W AB , in particular greater than 0.75 times W AB , in particular greater than 0.80 times W AB , in particular greater than at 0.85 times W AB , in particular greater than 0.90 times W AB , especially greater than 0.95 times W AB , especially greater than 1.00 times W AB , especially greater than 1.05 times W AB , especially greater than at 1.10 times W AB , in particular greater than 1.15 times W AB , in particular greater than 1.20 times W AB , especially greater than 1.25 times W AB , especially greater than 1.30 times W AB , especially greater than at 1.35 times W AB , in particular greater than 1.40 times W AB , in particular greater than 1.45 times W AB
  • W AB or Energy AB denotes the area delimited by the abscissa axis, the curve and the two vertical lines passing through the abscissa of the points A and B.
  • the surface E BD corresponds to a well of energy (in Force X displacement, or "work” according to the term of the physics, in Nmm). This is generally greater than 0.1 Nmm, preferably greater than 1 Nmm and even more particularly greater than 10 Nmm. It is more particularly less than 1000 Nmm.
  • This "virtual" BD energy is the difference in energy that would have been supplied from point B to point D at constant force, minus the actual energy supplied from point B to point D.
  • the inventors have worked on increasing the distance BD, especially the distance BG, by playing in particular on the relative height of the hooks with respect to the distance between the two bands in the closed state.
  • the force F B of the curve at point B is greater than twice the force F C of the curve at point C, in particular greater than 3 times the force F C , in particular greater than 4 times the force F C , especially greater than 5 times the force F C.
  • Coefficient of "click” (value of force at point B) 2 / (value of projected AB segment on the abscissa)
  • a "good”"click” coefficient is preferably greater than or equal to 100N 2 / mm, more particularly greater than or equal to 150N 2 / mm and / or in some cases less than or equal to 700N 2 / mm, more particularly less than or equal to 500N 2 / mm.
  • the user can receive a sensory feedback from the bag when sliding his fingers along the closure to close the latter thus being assured that it always closes the bag.
  • two hook ribbons of the invention are taken, for example as shown in FIGS. Figures 1 to 3 , a length of 25 cm, 5 cm of which are already intermeshed and inserted into a gap between two rollers 40 and 50.
  • the dimension of the gap corresponds substantially to the size of the closure in the interlocked state of the hooks.
  • Engrené means that locally most of the heads of the hooks of one of the ribbons cooperate as shown in the figure 3 or the figure 8 with one or more heads of the hooks on the other ribbon. In other words, locally, the majority of the heads of the hooks of one of the ribbons are between the head of the hooks of the other ribbons and the base of the other ribbons.
  • a pulling frame 60 is arranged to pull the closure upwards to pull the remainder of the two ribbons between the two rollers, in order to make their hooks mesh.
  • the force applied is measured as a function of the displacement of the traction frame. This force is measured using a 10N load cell which is equipped with the traction frame.
  • the product according to the invention is characterized by a variable signal, as shown in FIG. figure 6 , making it possible to send a sensory signal to the user who shows that the bag is closing.
  • This signal is characterized by a closing frequency, which is characterized by a period of the signal, in mm, and an amplitude.
  • a step No. 1 we take an interval of 5 mm which corresponds to that representative of the sensitivity of a user wishing to close such a closure.
  • step 2 we identify the maximum (0.75N) and the minimum (0.59N) in this interval.
  • the average (0.67N) is calculated in using the above maximum and minimum.
  • this method will be carried out several times, preferably three times, so as to obtain an average of this sensory signal amplitude.
  • the amplitude of the signal is greater than 2%, more particularly greater than 4%, more particularly greater than 10% and in some cases less than 50%.
  • the invention finds a particular application in the food field or the field of the stoma.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention se rapporte à un sac, notamment en une matière souple, ayant une ouverture et comportant un dispositif de fermeture autoagrippant dit à crochets dans crochets comportant un premier élément constitué d'une première bande de base et de premiers crochets faisant saillies de cette première bande de base et d'un deuxième élément constitué d'une deuxième bande de base et de deuxièmes crochets faisant saillies de la deuxième bande de base, les premiers et deuxièmes crochets s'engrènant mutuellement pour réaliser la fermeture de l'ouverture. La présente invention se rapporte également à un dispositif de fermeture autoagrippant de ce genre destiné à un sac.The present invention relates to a bag, in particular a flexible material, having an opening and comprising a hook-and-hook closure device in hooks comprising a first element consisting of a first base band and first hooks projecting from this first base band and a second element consisting of a second base band and second hooks projecting from the second base band, the first and second hooks intermeshing each other to close the opening. The present invention also relates to a self-gripping closing device of this kind for a bag.

ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION

On connaît déjà dans l'art antérieur des sacs comportant des fermetures autoagrippantes dites à crochets dans crochets, notamment du brevet européen 2 157 878 , au nom de la demanderesse, et WO 2012/073999 A1 , qui décrit toutes les caractéristiques du préambule de la revendication 1.In the prior art, bags with hook-and-loop closures in hooks, in particular the European patent, are already known. 2,157,878 , on behalf of the plaintiff, and WO 2012/073999 A1 which describes all the features of the preamble of claim 1.

Les dispositifs de fermeture autoagrippant décrits présentent l'avantage d'offrir une grande souplesse à la fermeture, ce qui les rend particulièrement bien adaptés aux sacs souples.The self-gripping closing devices described have the advantage of offering great flexibility in the closure, which makes them particularly suitable for flexible bags.

Cependant, ces dispositifs de fermeture de l'art antérieur présentent comme inconvénient que l'utilisateur, lorsqu'il ferme le sac en pinçant le dispositif de fermeture entre deux doigts et en les faisant glisser le long de la fermeture, ne reçoit aucun retour sensoriel en ce qui concerne la bonne fermeture du sac et peut avoir l'impression que le sac n'a pas été convenablement fermé. En outre, une fois le système fermé entre ses doigts, l'utilisateur doit fermer le reste du sac en glissant ses doigts transversalement le long de la fermeture. Or les produits de type zip de l'art antérieur ne donnent aucun signal indiquant que le sac est toujours fermé, la force de fermeture en glissement étant quasiment constante tout le long de la fermeture et identique que le sac se ferme ou non, alors même qu'un certain nombre de situations peuvent amener un système de fermeture zip à sortir de ses rails : une pollution, un aliment mal placé, un mauvais positionnement relatif des deux bandes se faisant face, etc. Il en résulte qu'il serait hautement souhaitable que l'utilisateur puisse ressentir qu'il ferme convenablement et toujours le sac non seulement au pincement mais également lors du coulissement.However, these closure devices of the prior art have the disadvantage that when the user closes the bag by pinching the closure device between two fingers and sliding them along the closure, he does not receive any sensory feedback. with regard to the proper closure of the bag and may have the impression that the bag has not been properly closed. In addition, once the system closed between his fingers, the user must close the rest of the bag by sliding his fingers transversely along the closure. However, the zip type products of the prior art give no signal that the bag is always closed, the sliding closing force being almost constant throughout the closure and the same whether the bag closes or not, even that a number of situations can cause a zip closure system to get out of its tracks: pollution, a misplaced food, a relative poor positioning of the two bands facing each other, etc. It follows that it would be highly desirable for the user to feel that he closes the bag properly and always not only at the pinch but also during the sliding.

OBJET ET RESUME DE L'INVENTIONOBJECT AND SUMMARY OF THE INVENTION

La présente invention vise à mettre à disposition un dispositif de fermeture pour un sac du genre ci-dessus, qui tout en étant simple de fabrication et qui conserve une excellente souplesse, permettant si on le souhaite une adaptation parfaite à des sacs souples, donne en outre à l'utilisateur un retour sensoriel concernant la fermeture du sac et notamment l'assurance que le sac a été convenablement fermé, notamment en le pinçant entre deux doigts, ainsi que lors du glissement pour fermer le reste du sac.The present invention aims to provide a closure device for a bag of the above kind, which while simple to manufacture and retains excellent flexibility, allowing if desired a perfect adaptation to flexible bags, gives addition to the user a sensory feedback regarding the closure of the bag and in particular the assurance that the bag has been properly closed, especially by pinching it between two fingers, as well as when sliding to close the rest of the bag.

Suivant l'invention, un dispositif de fermeture d'une ouverture d'un sac, notamment en matière souple, est tel que défini à la revendication 1, les sous revendications définissant des perfectionnements avantageux et/ou des modes de réalisation préférés.According to the invention, a device for closing an opening of a bag, in particular of flexible material, is as defined in claim 1, the subclaims defining advantageous improvements and / or preferred embodiments.

En prévoyant ainsi une telle propriété du dispositif de fermeture (courbe de force en fonction du déplacement), on obtient pour l'utilisateur une excellente sensation lors de la fermeture du dispositif de fermeture, notamment sous la forme d'une sorte de « clic » l'assurant de la bonne fermeture du dispositif de fermeture.By thus providing such a property of the closing device (force curve as a function of displacement), the user is given an excellent feeling when closing the closure device, particularly in the form of a sort of "click" ensuring the proper closing of the closing device.

Suivant l'invention, au moins l'un des éléments à crochets comporte des crochets issus d'une bande de base, chaque crochet comportant une partie formant tige et une partie formant tête faisant saillie latéralement de la partie formant tige, et l'agencement est tel que lorsque les deux éléments engrènent l'un dans l'autre, le point le plus supérieur de la tête de chaque crochet dudit au moins l'un des éléments d'accrochage reste à une distance donnée de la bande de base de l'autre élément à crochets.According to the invention, at least one of the hook members has hooks from a base band, each hook having a stem portion and a head portion projecting laterally from the stem portion, and the arrangement is such that when the two elements meshing with each other, the highest point of the head of each hook of said at least one of the attachment elements remains at a given distance from the base band of the other hook element.

Suivant l'invention, le rapport de la distance donnée e sur la hauteur h de la tige est compris entre 10% et 70%, notamment entre 20% et 50%. Suivant un mode de réalisation particulièrement préféré de l'invention, les deux éléments à crochets comportent chacun une bande de base et des crochets issus de la bande de base respective, chaque élément à crochets comportant une partie formant tige et une partie formant tête faisant saillie latéralement de la partie formant tige et, lorsque le sac est fermé, le point le plus supérieur de chaque crochet d'un des éléments à crochets reste à distance de la bande de base de l'autre élément à crochets et réciproquement.According to the invention, the ratio of the distance e given on the height h of the rod is between 10% and 70%, especially between 20% and 50%. According to a particularly preferred embodiment of the invention, the two hook elements each comprise a base band and hooks from the respective base band, each hook element having a rod portion and a projecting head portion. laterally of the rod portion and, when the bag is closed, the highest point of each hook of one of the hook members remains at a distance from the base band of the other hook member and vice versa.

De préférence, les crochets d'au moins l'un des deux éléments à crochets, notamment des deux éléments à crochets, sont agencés suivant une pluralité de rangées et la distance entre deux crochets voisins le long d'une rangée est supérieure ou égale à la dimension respective des crochets mesurée le long de ladite rangée.Preferably, the hooks of at least one of the two hook elements, in particular the two hook elements, are arranged in a plurality of rows and the distance between two adjacent hooks along a row is greater than or equal to the respective dimension of the hooks measured along said row.

Suivant un mode de réalisation préféré de l'invention, les crochets d'au moins un élément à crochets sont identiques les uns aux autres.According to a preferred embodiment of the invention, the hooks of at least one hook element are identical to each other.

Suivant un mode de réalisation préféré de l'invention, les crochets des deux éléments à crochets sont identiques les uns aux autres.According to a preferred embodiment of the invention, the hooks of the two hook elements are identical to each other.

Suivant un mode de réalisation préféré de l'invention, chaque crochet comporte deux parties d'accrochage droite et gauche en forme d'ailes faisant saillies latéralement d'une tige.According to a preferred embodiment of the invention, each hook has two wing-shaped right and left hooking parts projecting laterally from a rod.

De préférence, les crochets sont agencés en une pluralité de rangées et les parties d'accrochage en forme d'ailes s'étendent dans une direction transversale par rapport à la direction des rangées respectivement dans les sens droit et gauche opposés.Preferably, the hooks are arranged in a plurality of rows and the wing-shaped attachment parts extend in a direction transverse to the direction of the rows respectively in the opposite right and left directions.

Suivant un mode de réalisation préféré de l'invention, les crochets sont agencés en une pluralité de rangées, et chaque crochet d'au moins un élément, notamment des deux éléments, est délimité sur toute sa hauteur, c'est-à-dire de la bande de base jusqu'à son sommet, par deux surfaces planes mutuellement opposées transversales à la direction de la au moins une rangée de crochets, les deux surfaces planes étant notamment formées par une découpe.According to a preferred embodiment of the invention, the hooks are arranged in a plurality of rows, and each hook of at least one element, in particular of the two elements, is delimited over its entire height, that is to say from the base web to its top, by two mutually opposed flat surfaces transverse to the direction of the at least one row of hooks, the two flat surfaces being formed in particular by a cut.

Suivant un autre mode de réalisation de l'invention, l'un des deux éléments à crochets comporte un rail comportant une partie de base et une partie d'accrochage latérale qui s'étendent sur toute une rangée.According to another embodiment of the invention, one of the two hook elements comprises a rail comprising a base portion and a lateral hooking portion which extend over an entire row.

DESCRIPTION SUCCINTE DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

A titre d'exemple, on décrit maintenant des modes de réalisation préférés de l'invention en se reportant aux dessins, dans lesquels :

  • la figure 1 est une vue en perspective de dessus d'une partie d'un élément à crochets destiné à engrener dans un autre élément à crochet, notamment identique, pour former un dispositif de fermeture suivant l'invention ;
  • la figure 2 est une vue en perspective d'un sac souple en matière plastique comportant une ouverture dotée d'un dispositif de fermeture autoagrippant comportant deux éléments à crochets tels que décrits à la figure 1 dont les crochets sont agencés en une pluralité de rangées et se font face pour sa fermeture ;
  • la figure 3 est une vue en coupe montrant l'interaction entre les crochets des deux éléments à crochets lors de la fermeture du sac de la figure 2 ;
  • la figure 4A montre, pour un dispositif de fermeture à crochets du genre représenté aux figures 1 à 3 lorsqu'on le positionne entre deux bâtis, l'un immobile et l'autre mobile, la courbe donnant la force de compression appliquée au dispositif de fermeture en fonction du déplacement du bâti mobile en direction du bâti fixe (également appelé bâti immobile);
  • la figure 4B montre pour un dispositif de fermeture à crochets du genre représenté aux figures 1 à 3 lorsqu'on le positionne entre deux bâtis, l'un immobile et l'autre mobile, la courbe donnant la force de compression appliquée au dispositif de fermeture en fonction du déplacement du bâti mobile en direction du bâti fixe ou immobile;
  • la figure 4C montre plus en détail une partie de la courbe de la figure 4A ;
  • la figure 4D montre, pour un dispositif de fermeture à crochets de l'art antérieur, notamment tel que décrit dans EP-A-2157878 , lorsqu'on le positionne entre deux bâtis, l'un immobile et l'autre mobile, la courbe donnant la force de compression appliquée au dispositif de fermeture en fonction du déplacement du bâti mobile en direction du bâti fixe ;
  • les figures 5A et 5B sont des schémas représentant un dispositif de bâtis et un dispositif de fermeture suivant l'invention agencé entre les bâtis de manière à réaliser les mesures nécessaires pour tracer la courbe des figures 4A à 4D ;
  • la figure 6 représente la courbe obtenue donnant la force de traction fournie par un bâti de traction lorsque l'on tire avec ce bâti une fermeture suivant l'invention pour la faire passer dans un interstice entre deux rouleaux, pour ainsi simuler la fermeture par glissement le long de la fermeture ;
  • la figure 7 est un schéma représentant un équipement à rouleau et bâti de traction utilisé pour obtenir la courbe de la figure 6 ; et
  • la figure 8 est une vue en perspective et en coupe montrant l'interaction entre les crochets de deux éléments à crochets lors de la fermeture du sac suivant un autre mode de réalisation.
By way of example, preferred embodiments of the invention will now be described with reference to the drawings, in which:
  • the figure 1 is a perspective view from above of a portion of a hook element intended to mesh with another hook element, in particular the same element, to form a closure device according to the invention;
  • the figure 2 is a perspective view of a flexible plastic bag having an opening with a self-gripping closure device comprising two hook elements as described to the figure 1 whose hooks are arranged in a plurality of rows and face each other for its closure;
  • the figure 3 is a sectional view showing the interaction between the hooks of the two hook elements when closing the bag of the figure 2 ;
  • the Figure 4A shows, for a hook closure device of the kind shown in Figures 1 to 3 when positioned between two frames, one stationary and the other mobile, the curve giving the compressive force applied to the closure device as a function of the displacement of the movable frame towards the fixed frame (also called stationary frame);
  • the Figure 4B shows for a hook closure device of the kind shown in Figures 1 to 3 when positioned between two frames, one stationary and the other movable, the curve giving the compressive force applied to the closure device according to the displacement of the movable frame towards the fixed or stationary frame;
  • the figure 4C shows in more detail a part of the curve of the Figure 4A ;
  • the figure 4D shows, for a hook closure device of the prior art, in particular as described in EP-A-2157878 when positioned between two frames, one stationary and the other movable, the curve giving the compressive force applied to the closure device according to the displacement of the movable frame towards the fixed frame;
  • the Figures 5A and 5B are diagrams representing a assembly device and a closing device according to the invention arranged between the frames so as to carry out the measurements necessary to draw the curve of the Figures 4A to 4D ;
  • the figure 6 represents the curve obtained giving the tensile force provided by a traction frame when pulling with this frame a closure according to the invention to pass it in a gap between two rollers, so as to simulate the sliding closure along the closure ;
  • the figure 7 is a diagram depicting a rolling equipment and traction frame used to obtain the curve of the figure 6 ; and
  • the figure 8 is a perspective view in section showing the interaction between the hooks of two hook elements when closing the bag according to another embodiment.

DESCRIPTION DETAILLEE DE MODES DE REALISATIONDETAILED DESCRIPTION OF EMBODIMENTS

A la figure 2, un sac 1 plastique comporte une ouverture 2 délimitée par un premier bord 3 et un deuxième bord 4 se réunissant en un premier point 5 d'extrémité et un deuxième point 6 d'extrémité. Chacun des bords 3 et 4 comporte respectivement, fixées notamment par collage ou tout autre moyen (soudure thermique ou analogue, etc.), des bandes 7 et 8 à crochets respectives, comme celles représentées à la figure 1. Chaque bande est constituée d'une partie centrale à crochets, délimitée de part et d'autre par deux parties de lisière 20 longitudinales. Cependant, on peut également ne prévoir qu'une seule lisière d'un seul côté ou même aucune lisière.To the figure 2 a plastic bag 1 has an opening 2 delimited by a first edge 3 and a second edge 4 joining at a first end point and a second end point 6. Each of the edges 3 and 4 respectively comprises, fixed in particular by gluing or any other means (thermal welding or the like, etc.), strips 7 and 8 with respective hooks, such as those shown in FIG. figure 1 . Each strip consists of a hooked central portion, delimited on either side by two longitudinal edge portions 20. However, it is also possible to provide only one edge of a single side or even no edge.

Les bandes 7 et 8 à crochets sont en une matière thermoplastique classique, telle que le polyéthylène, le polypropylène, le polyester, ou une matière biodégradable telle que le PBS, le PLA, etc. Elles comportent chacune une pluralité de crochets 9, délimités chacun par deux surfaces 12 latérales et comportant chacun une tige 10 de forme sensiblement parallélépipédique rectangle. Les crochets sont agencés suivant des rangées parallèles les unes aux autres. Les surfaces 12 latérales s'étendent ici perpendiculairement à la direction d'extension des rangées. Elles pourraient également être inclinées par exemple d'un angle α de 1 à 35° par rapport à la perpendiculaire à la direction des rangées, comme dans une variante représentée à la figure 8. Dans cette variante de la figure 8, il est également prévu que les crochets d'une rangée soient légèrement décalés dans la direction perpendiculaire à la direction des rangées par rapport aux crochets de la rangée voisine, notamment d'une distance Q comprise entre 0,1mm et 0,7mm, plus particulièrement entre 0,2mm et 0,5mm.The hook strips 7 and 8 are made of a conventional thermoplastic material, such as polyethylene, polypropylene, polyester, or a biodegradable material such as PBS, PLA, etc. They each comprise a plurality of hooks 9, each delimited by two lateral surfaces 12 and each having a rod 10 of substantially rectangular parallelepiped shape. The hooks are arranged in rows parallel to each other. The lateral surfaces 12 here extend perpendicularly to the direction of extension of the rows. They could also be inclined for example by an angle α of 1 to 35 ° with respect to the perpendicular to the direction of the rows, as in a variant shown in FIG. figure 8 . In this variant of the figure 8 it is also provided that the hooks of a row are slightly offset in the direction perpendicular to the row direction relative to the hooks of the neighboring row, in particular with a distance Q of between 0.1 mm and 0.7 mm, plus especially between 0.2mm and 0.5mm.

La distance entre deux crochets successifs dans une rangée est supérieure ou égale à l'épaisseur de chaque crochet mesurée dans cette même direction de rangée. En particulier, les deux surfaces 12 latérales sont planes, correspondant au fait qu'elles ont été formées par attaque au couteau comme suivant le procédé bien connu dans le domaine sous la dénomination procédé De Navas ou Repla décrit par exemple au brevet américain US-A-4,056,593 . La tête et la tige de chaque crochet sont toutes les deux délimitées de part et d'autre par ces deux surfaces latérales planes. On pourrait cependant réaliser les crochets d'une autre manière et notamment on pourrait à la place former des champignons ou des crochets à tête simple.The distance between two successive hooks in a row is greater than or equal to the thickness of each hook measured in the same row direction. In particular, the two lateral surfaces 12 are flat, corresponding to the fact that they were formed by knife attack as in the method well known in the art under the name De Navas or Repla process described for example in the US patent US Patent 4,056,593 . The head and the stem of each hook are both delimited on both sides by these two flat lateral surfaces. However, the hooks could be made in another way and in particular one could instead form fungi or hooks single head.

Deux parties gauche et droite d'extension formant ailes de crochet 13 et 14 font saillies latéralement de part et d'autre dans la direction perpendiculaire à la direction des rangées de la partie de sommet de la tige 10. Ces ailes 13 et 14 forment la partie d'accrochage du crochet. Dans une même rangée, les crochets sont agencés à distance les uns des autres. Cette distance inter crochets, mesurée par la distance au niveau de la bande de base de la tige entre les surfaces 12 latérales planes se faisant face mutuellement respectivement d'un crochet et de son voisin immédiat dans la même rangée, est mesurée le long de la direction de la rangée et est désignée par d. Cette distance d est ici par exemple supérieure ou égale à f, épaisseur du crochet.Two left and right extension portions forming hook flanges 13 and 14 protrude laterally on either side in the direction perpendicular to the direction of the rows of the crown portion of the rod 10. These flanges 13 and 14 form the hooking part of the hook. In the same row, the hooks are arranged at a distance from each other. This inter-hook distance, as measured by the distance at the base web of the rod between the flat lateral surfaces 12 mutually facing each other of a hook and its immediate neighbor in the same row, is measured along the direction of the row and is designated by d. This distance d is here for example greater than or equal to f, thickness of the hook.

Comme on le voit à la figure 3, le point le plus supérieur 21 des crochets de la bande 7 à crochets, lorsque les crochets engrènent les uns dans les autres avec les crochets de l'autre bande 8 à crochets, se trouve à une distance e non nulle de la base de l'autre bande 8 de base. De même, le point le plus supérieur 21 (inférieur à la figure) des crochets de la bande 8 à crochets se trouve à une distance non nulle de la base de la bande 7 de base, notamment la même distance e non nulle.As we see in figure 3 , the uppermost point 21 of the hooks of the hooked strip 7, when the hooks mesh with each other with the hooks of the other hooked strip 8, is at a non-zero distance e from the base of the hook. other 8 base band. Similarly, the highest point 21 (less than the figure) of the hooks of the strip 8 hooks is at a non-zero distance from the base of the base strip 7, including the same distance e non-zero.

Les dimensions des crochets peuvent notamment être les suivantes :
L'épaisseur f peut être comprise entre 0,1mm et 2,0mm, plus particulièrement entre 0,2mm et 0,65mm.The dimensions of the hooks may notably be the following:
The thickness f can be between 0.1mm and 2.0mm, more particularly between 0.2mm and 0.65mm.

La hauteur h peut être comprise entre 0,4mm et 1,5mm, plus particulièrement entre 0,9mm et 1,3mm, préférentiellement de l'ordre de 1 mm ou encore préférentiellement de l'ordre de 1,1mm.The height h may be between 0.4 mm and 1.5 mm, more particularly between 0.9 mm and 1.3 mm, preferably of the order of 1 mm or even more preferably of the order of 1.1 mm.

Ainsi, à l'état fermé (figures 3 ou 8), la distance entre le point le plus supérieur de la tête et la bande de base opposée peut être comprise entre 0,2 mm et 0,4mm, ou encore en pourcentage de la hauteur des crochets, est selon l'invention toujours compris entre 10% et 70%, en particulier entre 20% et 50%.Thus, in the closed state ( figures 3 or 8 ), the distance between the highest point of the head and the opposite base strip may be between 0.2 mm and 0.4 mm, or as a percentage of the height of the hooks, is according to the invention always between 10% and 70%, especially between 20% and 50%.

Les épaisseurs des bandes de base peuvent être comprises entre 0,07mm et 1mm, en particulier inférieure à 0,5mm et de préférence de l'ordre de 0,1mm.The thicknesses of the base strips may be between 0.07 mm and 1 mm, in particular less than 0.5 mm and preferably of the order of 0.1 mm.

La densité des crochets peut être comprise entre 10 et 500 crochets/cm2, en particulier entre 50 et 250 crochets/cm2.The density of the hooks can be between 10 and 500 hooks / cm 2 , in particular between 50 and 250 hooks / cm 2 .

On réalise le test suivant sur la fermeture de la figure 3 comportant les deux bandes à crochets 7 et 8. Les deux bandes 7 et 8 sont fixées (du côté sans crochets) respectivement à un bâti immobile et un bâti mobile en se faisant face, par exemple par collage, pour éviter le glissement des deux bandes ou rubans, par exemple en utilisant une bande adhésive double face.The following test is carried out on the closure of the figure 3 comprising the two hooked strips 7 and 8. The two strips 7 and 8 are fixed (on the side without hooks) respectively to a stationary frame and a frame movable facing each other, for example by gluing, to prevent the sliding of the two strips. or ribbons, for example using a double-sided adhesive tape.

Dans la position initiale des bâtis et des rubans, on fait en sorte que les crochets des deux rubans à crochets soient, sur des parties d'extrémité, engrenés ou clipsés les uns dans les autres, tandis que sur une partie centrale ayant une extension sensiblement égale à l'extension en largeur de la partie utile de compression du bâti mobile, ils soient à distance les uns des autres (voir la figure 5A) .In the initial position of the racks and ribbons, it is arranged that the hooks of the two hook ribbons are, on end portions, engaged or clipped. each other, while on a central portion having an extension substantially equal to the width extension of the useful part of compression of the movable frame, they are at a distance from each other (see Figure 5A ).

On déplace alors le bâti mobile vers le bâti immobile, notamment à une vitesse d'environ 100 mm/mn. On mesure au fur et à mesure de ce déplacement du bâti mobile la force de compression appliquée à la fermeture constituée des deux rubans en fonction du déplacement grâce à une cellule dynamométrique de 100 N dont est muni, par exemple, le bâti mobile.The moving frame is then moved towards the stationary frame, in particular at a speed of approximately 100 mm / min. As the displacement of the moving frame is measured, the compressive force applied to the closure consisting of the two ribbons as a function of the displacement is measured by means of a load cell of 100 N provided with, for example, the mobile frame.

On obtient une courbe comme représentée aux figures 4A, 4B, 4C ou 4D, dans laquelle l'axe des abscisses indique un déplacement en millimètre (mm) et l'axe des ordonnées une force en Newtons (N). Cette courbe est croissante à partir d'un point A jusqu'à un point B formant un premier maximum local qui correspond au point de passage de la tête des crochets de la bande solidaire du bâti mobile au-delà des têtes des crochets de l'autre bande solidaire du bâti immobile inférieur. La courbe décroît ensuite jusqu'à un minimum local C qui correspond au moment où le point supérieur des têtes des crochets du ruban supérieur vient en contact avec le fond de la contrepartie opposée. La courbe croît ensuite, correspondant à un écrasement des deux bandes l'une contre l'autre. Il est à noter que l'abscisse à partir de laquelle la courbe commence à croître à partir de zéro est variable en fonction de l'écartement initial des bâtis mobile et immobile. Ainsi, pour réaliser les figures 4A, 4C et 4D, l'opérateur est parti d'une écartement de départ entre les bâtis plus grand que pour réaliser la figure 4B. Cependant, la forme de la courbe à partir du point où elle commence à croître est identique et ne dépend pas de cet écartement initial, ni de l'abscisse de ce point de départ.A curve is obtained as shown in Figures 4A, 4B , 4C or 4D where the x-axis indicates a displacement in millimeters (mm) and the y-axis a force in Newtons (N). This curve is increasing from a point A to a point B forming a first local maximum which corresponds to the point of passage of the head of the hooks of the band secured to the movable frame beyond the heads of the hooks of the another band attached to the lower stationary structure. The curve then decreases to a local minimum C which corresponds to the moment when the upper point of the heads of the hooks of the upper ribbon comes into contact with the bottom of the opposite counterpart. The curve then increases, corresponding to a crushing of the two bands against each other. It should be noted that the abscissa from which the curve starts to grow from zero is variable depending on the initial spacing of the mobile and stationary frames. So, to achieve the Figures 4A , 4C and 4D , the operator is from a starting gap between the frames larger than to achieve the Figure 4B . However, the shape of the curve from the point where it begins to grow is identical and does not depend on this initial spacing, nor the abscissa of this starting point.

Lorsque l'utilisateur entame l'opération de fermeture, il met en contact les deux bandes et applique une pression pour réaliser la fermeture. Suivant l'invention, on obtient une fermeture qui fournit à l'utilisateur un retour sensoriel concernant le fait que la fermeture est en place et prête à être fermée. Ceci est un avantage certain car cela évite une fermeture immédiate qui nécessite dans certains cas de rouvrir l'emballage lorsque la fermeture est dans un positionnement non adapté. En outre, suivant la présente invention, cette caractéristique participe dans une grande mesure à la qualité perçue de la fermeture par l'utilisateur. Cette caractéristique correspond au tronçon AB de faible pente de la courbe de compression des figures 4A à 4C, l'ensemble du système de fermeture s'équilibrant. L'apparition de cette caractéristique a été permise par une conception particulière du système. La fermeture est composée d'une pluralité d'éléments indépendants les uns des autres ayant une flexibilité suffisante pour se repositionner les uns par rapport aux autres.When the user starts the closing operation, he puts the two strips in contact and applies a pressure to make the closure. In accordance with the invention, a closure is provided which provides the user with sensory feedback that the closure is in place and ready to close. This is a definite advantage because it avoids an immediate closure which in some cases requires reopening the package when the closure is in an unsuitable position. In addition, according to the present invention, this characteristic contributes to a great extent to the perceived quality of the closure by the user. This characteristic corresponds to the low slope section AB of the compression curve of the Figures 4A to 4C , the entire closure system being balanced. The appearance of this feature has been enabled by a particular design of the system. The closure is composed of a plurality of elements independent of each other having sufficient flexibility to reposition themselves relative to each other.

Un utilisateur d'une fermeture a besoin de ressentir que la fermeture a bien eu lieu, pour le rassurer au sujet de l'efficacité de la fermeture. Les inventeurs ont donc cherché à créer un ressenti particulier pour l'utilisateur sous la forme d'un effet « clic », un « clic » non pas auditif mais au sens du toucher.A user of a closure needs to feel that the closure has occurred, to reassure him about the effectiveness of the closure. The inventors have therefore sought to create a particular feeling for the user in the form of a "click" effect, a "click" not auditory but in the sense of touch.

Pour créer un clic caractéristique, il a été observé qu'une zone J(délimitée en haut par la droite horizontale passant par B, soit le segment BG, sur le côté droit par le segment vertical GC et en dessous par la courbe elle-même) devait avoir la surface la plus grande possible, cette surface correspond à une perte d'énergie en Force X déplacement, (ou « travail » selon le terme de la physique, en N.mm) . Celle-ci est généralement supérieure à 0.1 N.mm, préférentiellement supérieure à 1 N.mm et encore plus particulièrement supérieure à 10 N.mm. Elle est plus particulièrement inférieure à 1000 N.mm. Celle-ci correspond à la sensation de fermeture perçue par l'utilisateur.To create a characteristic click, it was observed that a zone J (delimited at the top by the horizontal line passing through B, the segment BG, on the right side by the vertical segment GC and below by the curve itself ) had to have the largest surface possible, this surface corresponds to a loss of energy in Force X displacement, (or "work" according to the term of physics, in N.mm). This is generally greater than 0.1 N.mm, preferably greater than 1 N.mm and even more particularly greater than 10 N.mm. It is more particularly less than 1000 N.mm. This corresponds to the sensation of closure perceived by the user.

De préférence, les inventeurs de la présente invention ont compris qu'une zone (délimitée en haut par le segment BD horizontal et en dessous par la courbe elle-même) devait avoir la surface EBD la plus grande possible, par rapport à la surface WAB sous la courbe entre les points A et B, à savoir que EBD doit être supérieure à 0,70 fois WAB, notamment supérieure à 0,75 fois WAB, notamment supérieure à 0,80 fois WAB, notamment supérieure à 0,85 fois WAB, notamment supérieure à 0,90 fois WAB, notamment supérieure à 0,95 fois WAB, notamment supérieure à 1,00 fois WAB, notamment supérieure à 1,05 fois WAB, notamment supérieure à 1,10 fois WAB, notamment supérieure à 1,15 fois WAB, notamment supérieure à 1,20 fois WAB, notamment supérieure à 1,25 fois WAB, notamment supérieure à 1,30 fois WAB, notamment supérieure à 1,35 fois WAB, notamment supérieure à 1,40 fois WAB, notamment supérieure à 1,45 fois WAB, notamment supérieure à 1,50 fois WAB. En particulier EBD est égale à environ 1,3 fois WAB.Preferably, the inventors of the present invention have understood that a zone (delimited at the top by the horizontal BD segment and below by the curve itself) should have the largest possible area BD as compared to the surface. W AB under the curve between points A and B, namely that E BD must be greater than 0.70 times W AB , in particular greater than 0.75 times W AB , in particular greater than 0.80 times W AB , in particular greater than at 0.85 times W AB , in particular greater than 0.90 times W AB , especially greater than 0.95 times W AB , especially greater than 1.00 times W AB , especially greater than 1.05 times W AB , especially greater than at 1.10 times W AB , in particular greater than 1.15 times W AB , in particular greater than 1.20 times W AB , especially greater than 1.25 times W AB , especially greater than 1.30 times W AB , especially greater than at 1.35 times W AB , in particular greater than 1.40 times W AB , in particular greater than 1.45 times W AB , in particular s up to 1.50 times W AB . In particular E BD is equal to about 1.3 times W AB .

Dans la présente demande on désigne par travail WAB ou Energie AB la surface délimitée par l'axe des abscisses, la courbe et les deux droites verticales passant par les abscisses des points A et B.In the present application, W AB or Energy AB denotes the area delimited by the abscissa axis, the curve and the two vertical lines passing through the abscissa of the points A and B.

La surface EBD, ou Energie BD, correspond à un puits d'énergie (en Force X déplacement, ou « travail » selon le terme de la physique, en Nmm). Celle-ci est généralement supérieure à 0.1 Nmm, préférentiellement supérieure à 1 Nmm et encore plus particulièrement supérieure à 10 Nmm. Elle est plus particulièrement inférieure à 1000 Nmm.The surface E BD , or Energy BD, corresponds to a well of energy (in Force X displacement, or "work" according to the term of the physics, in Nmm). This is generally greater than 0.1 Nmm, preferably greater than 1 Nmm and even more particularly greater than 10 Nmm. It is more particularly less than 1000 Nmm.

Celle-ci correspond à la sensation de fermeture perçue par l'utilisateur.This corresponds to the sensation of closure perceived by the user.

Cette énergie « virtuelle » BD correspond à la différence de l'énergie qui aurait été fournie en allant du point B au point D à force constante, moins l'énergie réelle fournie du point B au point D. Pour augmenter ce puits d'énergie, les inventeurs ont travaillé sur l'augmentation de la distance B-D, notamment la distance B-G, en jouant en particulier sur la hauteur relative des crochets par rapport à la distance entre les deux bandes à l'état de fermeture.This "virtual" BD energy is the difference in energy that would have been supplied from point B to point D at constant force, minus the actual energy supplied from point B to point D. To increase this energy sink the inventors have worked on increasing the distance BD, especially the distance BG, by playing in particular on the relative height of the hooks with respect to the distance between the two bands in the closed state.

Quelques intervalles concernant cette courbe :

  • Le point A est le point le plus à gauche de la courbe à partir duquel la force devient non nulle.
  • La force FB au point B est généralement comprise entre 10N et 35N, plus particulièrement entre 15N et 25N et en particulier entre 17N et 23N, et est généralement de l'ordre de 20N. La force FA au point A est inférieure à la force FB au point B pour une même courbe.
  • La force FC au point C est généralement comprise entre 0.1N et 30N, plus particulièrement entre 1N et 15N, notamment entre 4N et 10N, par exemple peut être égale à 8N et en particulier peut être inférieure à 7N, plus particulièrement inférieure à 5N. La force FC au point C est inférieure à la force FB au point B pour une même courbe. Le point C est le point dont la force est minimale le plus à droite de la courbe. C'est aussi le premier minimum local après le point B.
  • La distance entre les points A et D est généralement comprise entre 0,1 mm et 4 mm, plus particulièrement de l'ordre de 1,5 mm.
  • La valeur du projeté du segment BD selon l'axe des abscisses est inférieure à la valeur du projeté du segment AD selon l'axe des abscisses.
  • La valeur du projeté du segment AB selon l'axe des abscisses est généralement inférieure ou égale à 2,5mm, plus particulièrement inférieure ou égale à 1,5mm, et dans certains cas supérieure à 0,3mm et plus particulièrement supérieure à 0,5mm.
  • La valeur du projeté du segment BD est supérieure à 0,45mm, notamment supérieur à 0,50mm et de préférence inférieur à 2,00mm, par exemple il est égal à 0,57mm.
Some intervals concerning this curve:
  • Point A is the leftmost point of the curve from which the force becomes non-zero.
  • The force F B at the point B is generally between 10N and 35N, more particularly between 15N and 25N and in particular between 17N and 23N, and is generally of the order of 20N. The force F A at point A is less than the force F B at point B for the same curve.
  • The force F C at the point C is generally between 0.1N and 30N, more particularly between 1N and 15N, in particular between 4N and 10N, for example may be equal to 8N and in particular may be less than 7N, more particularly less than 5N . The force F C at point C is less than the force F B at point B for the same curve. Point C is the point whose minimum force is the most right of the curve. It is also the first local minimum after point B.
  • The distance between the points A and D is generally between 0.1 mm and 4 mm, more particularly of the order of 1.5 mm.
  • The projected value of the segment BD along the abscissa axis is smaller than the projected value of the segment AD along the abscissa axis.
  • The value of the projected segment AB along the abscissa axis is generally less than or equal to 2.5 mm, more particularly less than or equal to 1.5 mm, and in some cases greater than 0.3 mm and more particularly greater than 0.5 mm .
  • The value of the projected BD segment is greater than 0.45mm, especially greater than 0.50mm and preferably less than 2.00mm, for example it is equal to 0.57mm.

D'autre part, de préférence, la force FB de la courbe au point B est supérieure à 2 fois la force FC de la courbe au point C, notamment supérieure à 3 fois la force FC, notamment supérieure à 4 fois la force FC, notamment supérieure à 5 fois la force FC.On the other hand, preferably, the force F B of the curve at point B is greater than twice the force F C of the curve at point C, in particular greater than 3 times the force F C , in particular greater than 4 times the force F C , especially greater than 5 times the force F C.

On définit le coefficient de « clic » selon la formule suivante :
Coefficient de « clic » = (valeur de la force au point B)2/(valeur du projeté du segment AB sur l'axe des abscisses)We define the coefficient of "click" according to the following formula:
Coefficient of "click" = (value of force at point B) 2 / (value of projected AB segment on the abscissa)

Un « bon » coefficient de « clic » est préférentiellement supérieur ou égal à 100N2/mm, plus particulièrement supérieur ou égal 150N2/mm et/ou dans certains cas inférieur ou égal à 700N2/mm, plus particulièrement inférieur ou égal à 500N2/mm.A "good""click" coefficient is preferably greater than or equal to 100N 2 / mm, more particularly greater than or equal to 150N 2 / mm and / or in some cases less than or equal to 700N 2 / mm, more particularly less than or equal to 500N 2 / mm.

D'autre part, suivant l'invention, l'utilisateur peut recevoir un retour sensoriel du sac lorsqu'il fait coulisser ses doigts le long de la fermeture pour fermer cette dernière étant ainsi assuré qu'il ferme toujours le sac.On the other hand, according to the invention, the user can receive a sensory feedback from the bag when sliding his fingers along the closure to close the latter thus being assured that it always closes the bag.

Cet avantage de la fermeture suivant l'invention est mis en exergue à la figure 6.This advantage of the closure according to the invention is highlighted in the figure 6 .

Pour obtenir la courbe de la figure 6, on prend deux rubans à crochets de l'invention, par exemple comme représenté aux figures 1 à 3, d'une longueur de 25 cm dont 5 cm sont déjà engrenés mutuellement et insérés dans un interstice entre deux rouleaux 40 et 50. La dimension de l'interstice correspond sensiblement à la dimension de la fermeture à l'état engrené des crochets. On entend par engrené le fait que localement la majorité des têtes des crochets d'un des rubans coopèrent comme le montre la figure 3 ou la figure 8 avec une ou des têtes des crochets de l'autre ruban. En d'autres termes, localement, la majorité des têtes des crochets d'un des rubans se situent entre la tête des crochets de l'autre des rubans et la base de l'autre des rubans.To get the curve of the figure 6 two hook ribbons of the invention are taken, for example as shown in FIGS. Figures 1 to 3 , a length of 25 cm, 5 cm of which are already intermeshed and inserted into a gap between two rollers 40 and 50. The dimension of the gap corresponds substantially to the size of the closure in the interlocked state of the hooks. Engrené means that locally most of the heads of the hooks of one of the ribbons cooperate as shown in the figure 3 or the figure 8 with one or more heads of the hooks on the other ribbon. In other words, locally, the majority of the heads of the hooks of one of the ribbons are between the head of the hooks of the other ribbons and the base of the other ribbons.

Un bâti 60 de traction est agencé de manière à tirer la fermeture vers le haut pour faire passer en le tirant le reste des deux rubans entre les deux rouleaux en vue de faire s'engrener leurs crochets. On mesure en fonction du déplacement du bâti de traction la force appliquée. Cette force est mesurée à l'aide d'une cellule dynamométrique de 10N dont est équipé le bâti de traction.A pulling frame 60 is arranged to pull the closure upwards to pull the remainder of the two ribbons between the two rollers, in order to make their hooks mesh. The force applied is measured as a function of the displacement of the traction frame. This force is measured using a 10N load cell which is equipped with the traction frame.

Contrairement à l'art antérieur où l'on obtenait une force quasiment constante durant toute la fermeture, le produit selon l'invention se caractérise par un signal variable, comme représenté à la figure 6, permettant d'adresser un signal sensoriel à l'utilisateur qui montre que le sac est bien en train de se fermer. Ce signal se caractérise par une fréquence de fermeture, que l'on caractérise par une période du signal, en mm, et une amplitude.Unlike the prior art, where a virtually constant force was obtained during the entire closure, the product according to the invention is characterized by a variable signal, as shown in FIG. figure 6 , making it possible to send a sensory signal to the user who shows that the bag is closing. This signal is characterized by a closing frequency, which is characterized by a period of the signal, in mm, and an amplitude.

Dans une étape n°1, on prend un intervalle de 5 mm qui correspond à celui représentatif de la sensibilité d'un utilisateur souhaitant fermer une telle fermeture.In a step No. 1, we take an interval of 5 mm which corresponds to that representative of the sensitivity of a user wishing to close such a closure.

Dans une étape n°2, on identifie le maximum (0.75N) et le minimum (0.59N) dans cet intervalle.In step 2, we identify the maximum (0.75N) and the minimum (0.59N) in this interval.

Dans une étape n°3, on calcule la moyenne (0.67N) en utilisant le maximum et le minimum précités.In a step 3, the average (0.67N) is calculated in using the above maximum and minimum.

On calcule ensuite l'amplitude du signal sensitif défini par le rapport du Maximum précité/ Moyenne précitée. On obtient ici 11%.The amplitude of the sensory signal defined by the ratio of the abovementioned Maximum / Average is then calculated. Here we get 11%.

Préférentiellement, on effectuera plusieurs fois cette méthode, préférentiellement trois fois, de manière à obtenir une moyenne de cette amplitude de signal sensitif.Preferably, this method will be carried out several times, preferably three times, so as to obtain an average of this sensory signal amplitude.

De manière générale, l'amplitude du signal est supérieure à 2%, plus particulièrement supérieure à 4%, plus particulièrement supérieure à 10% et dans certains cas inférieure à 50%.In general, the amplitude of the signal is greater than 2%, more particularly greater than 4%, more particularly greater than 10% and in some cases less than 50%.

L'invention trouve une application particulière dans le domaine alimentaire ou encore le domaine de la stomie.The invention finds a particular application in the food field or the field of the stoma.

Claims (14)

  1. A device for closing an opening of a bag (1), especially a bag made of flexible material, comprising on the one hand a first element with hooks, and on the other hand a second element with hooks, the hooks (9) of the two elements engaging into one another to achieve the closure of the opening, each element with hooks comprising a base strip (7, 8) and hooks (9) coming from the base strip (7, 8), wherein the hooks (9) of at least one of the elements with hooks comprise a part that forms a stem (10) and a part that forms a head that protrudes laterally from the part forming the stem, and the arrangement is such that when the two elements engage into one another, the uppermost point of the head of each hook (9) of said at least one of the hooking elements remains a given distance (e) away from the base strip (7, 8) of the other element with hooks, characterized in that the material or materials and/or the dimension or dimensions of the elements with hooks is/are chosen such that when the two elements with hooks are positioned with their respective hooks facing one another between an immobile structure and a mobile structure moving towards the immobile structure in order to compress the hooks of the two elements with hooks into one another, and the curve giving the compressive force applied by the mobile structure as a function of the movement of the mobile structure is traced, one obtains a curve that has a section that rises to a first local maximum (B), and next a section then falling to a local minimum (C), after which there is once again a rising section, and an energy well EBD, equal to the product of force FB at the first local maximum (B) times the distance (BD) of the first local maximum (B) at the point (D) of intersection of the curve with the horizontal straight line passing via the first local maximum (B), less the work WBD, i.e. ((FB x BD) - WBD) is greater than 0.7 times the work provided WAB by the mobile structure between a point (A) from which the force starts to rise up to the first local maximum (B), the stem part having a lower face which is curved with its concavity turned towards the base strip (7, 8), the ratio of the given distance (e) on the height (h) of the stem (10) being comprised between 10% and 70%.
  2. The device according to Claim 1, characterized in that the energy well EBD is greater than the work provided WAB by the mobile structure between a point (A) from which the force starts to increase up to the first local maximum (B).
  3. The device according to Claim 1 or 2, characterized in that the distance (BD) from the first local maximum (B) to the intersection point (D) of the curve with the horizontal straight line passing via the first local maximum (B) is greater than 0.45 mm.
  4. The device according to Claim 3, characterized in that the distance (BD) from the first local maximum (B) to the point (D) of intersection of the curve with the horizontal straight line passing via the first local maximum (B) is between 0.5 mm and 2.0 mm.
  5. The device according to any of Claims 1 to 4, characterized in that the force (FB) of the curve at the first local maximum (B) is greater than two times the force (Fc) of the curve at the local minimum (C).
  6. The device according to Claim 5, characterized in that the force (FB) of the curve at the first local maximum (B) is greater than five times the force (FC) of the curve at the local minimum (C).
  7. The device according to any of Claims 1 to 6, characterized in that the force (Fc) is less than 7N.
  8. The device according to Claim 7, characterized in that the force (Fc) is less than 5N.
  9. The device according to any of Claims 1 to 8, characterized in that the absolute value of the slope of the straight line (AB) passing from point (A) from which the force starts to increase to the first local maximum (B) is strictly less than the absolute value of the slope of the straight line (BC) passing from the first local maximum (B) to the local minimum (C).
  10. The device according to any of Claims 1 to 9, characterized in that the ratio of the given distance to the height of the stem (10) is between 20% and 50%.
  11. The device according to any of Claims 1 to 10, characterized in that the two elements with hooks each comprise a base strip (7, 8) and hooks (9) coming from the respective base strip (7, 8), each element with hooks comprising a part forming a stem (10) and a part forming a head that protrudes laterally from the part forming the stem (10) and, when the bag (1) is closed, the uppermost point of the each hook (9) of one of the elements with hooks remains a distance away from the base strip (7, 8) of the other element with hooks, and vice versa.
  12. The device according to any of Claims 1 to 11, characterized in that the hooks of at least one of the two elements with hooks, in particular both of the two elements with hooks, are arranged in a plurality of rows, and the distance between two adjacent hooks (9) along a row is greater than or equal to the respective dimension of the hooks (9) measured along said row.
  13. The device according to any of Claims 1 to 12, characterized in that the first local maximum (B) is between 10 N and 35 N, in particular between 15 N and 25 N.
  14. The device according to any of Claims 1 to 13, characterized in that a "click" coefficient equal to the ratio of the square of the value of the force at the first local maximum (B) on the value of the projection of the segment AB over the horizontal axis is between 100 and 500 N2/mm, in particular between 150 and 500 N2/mm.
EP15786936.3A 2014-10-31 2015-10-27 Closure device with hooks in hooks having sensory effect Active EP3212028B1 (en)

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PL15786936T PL3212028T3 (en) 2014-10-31 2015-10-27 Closure device with hooks in hooks having sensory effect

Applications Claiming Priority (2)

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FR1402467A FR3027775B1 (en) 2014-10-31 2014-10-31 HOOK CLOSURE DEVICE IN SENSORY EFFECT HOOKS
PCT/EP2015/074894 WO2016066649A1 (en) 2014-10-31 2015-10-27 Closure device with hooks in hooks having sensory effect

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EP3212028B1 true EP3212028B1 (en) 2019-01-30

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JP (1) JP6815315B2 (en)
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FR (1) FR3027775B1 (en)
PL (1) PL3212028T3 (en)
RU (1) RU2692846C2 (en)
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US10070766B2 (en) 2016-09-14 2018-09-11 Unger Marketing International, Llc Hard surface cleaning devices
US10973387B2 (en) 2015-06-26 2021-04-13 Unger Marketing International, Llc Multi-orientation cleaning device
US10582743B2 (en) * 2016-03-21 2020-03-10 Delphini, Llc System and method for activated interlocking fasteners and seals

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CN107105829A (en) 2017-08-29
KR102547170B1 (en) 2023-06-22
KR20170078642A (en) 2017-07-07
US10273057B2 (en) 2019-04-30
EP3212028A1 (en) 2017-09-06
BR112017007032B1 (en) 2022-05-03
TR201906306T4 (en) 2019-05-21
CN107105829B (en) 2021-01-08
CA2962513A1 (en) 2016-05-06
US20170305608A1 (en) 2017-10-26
RU2017118407A (en) 2018-11-30
RU2017118407A3 (en) 2019-04-22
JP2017533045A (en) 2017-11-09
RU2692846C2 (en) 2019-06-28
PL3212028T3 (en) 2019-08-30
JP6815315B2 (en) 2021-01-20
BR112017007032A2 (en) 2017-12-12
FR3027775B1 (en) 2016-11-11
WO2016066649A1 (en) 2016-05-06
FR3027775A1 (en) 2016-05-06
ES2721776T3 (en) 2019-08-05
CA2962513C (en) 2022-11-29

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