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
  • B65D33/25—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
  • B65D33/2566—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 using two or more independently operable slide fasteners
• • 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
  • B31B70/813—Applying closures
  • B31B70/8131—Making bags having interengaging closure elements
• • 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
  • B31B70/813—Applying closures
  • B31B70/8131—Making bags having interengaging closure elements
  • B31B70/8132—Applying the closure elements in the machine direction

Definitions

• the present invention relates to the field of bags provided with complementary closure profiles actuated by a slider.
• It relates more specifically to a slider provided with biasing pins, a bag that is equipped, a closure assembly with complementary profiles, a device and a method for its implementation.
• FIG. 1A is a perspective view of such a slider
• FIG. 2A is a bottom view of this slider
• FIG. 3A is a view similar to the previous slightly in perspective
• FIGS. 4A, 5A, 6A and 7A are respectively sectional views of the cursor of FIG. 2A, along the planes IV-IV, V-V, VI-VI and VII-VII of this figure;
• FIG. 8A is an end view of the slider of Figure 1 A.
• the sections with which the slider is intended to cooperate have been shown only in Figure 8A, so as not to weigh down the other figures unnecessarily.
• Such a slider is made of molded plastic and has a generally known structure. More precisely, this slider has an inverted “U” -shaped section, and comprises a base 10 to which two lateral wings 11 and 12 are attached, called “sidewalls".
• X-X ' the longitudinal axis of the slider, which corresponds to its direction of movement when it is installed on a bag with complementary profiles, has been designated. The flanks extend parallel to this axis.
• 1 10 and 1 1 1 the outer and inner faces of the sidewall 1 1, while the inner and outer faces of the sidewall 12 carry the references 120 and 121.
• the opposite ends of the slider 1 are shaped arches 2 and 3 of greater thickness than the rest of his body.
• this thickness could be identical over the entire range of the cursor.
• the internal space of the slider contains means adapted to urge complementary closure profiles of a bag (marked Pi, P 2 and S, respectively, in FIG. 8A), towards or away from each other according to FIG. direction of movement of the cursor along these profiles.
• internal space is meant the space delimited by the base 10 and the flanks 11 and 12.
• these means comprise a longitudinal rib 13 which extends along the median plane XX 'of the cursor.
• This rib 13 integral with the inner face of the base 10, separates the internal space into two corridors Ci and C 2 .
• the rib is extended downwards by an elongate central soleplate 14 which projects on either side of the rib 13 to form facets.
• Each facet is turned towards the base 10.
• protuberance means any means associated with the corresponding section, which allows the cursor to cooperate with the bag.
• the inner faces 1 1 1 and 121 of the flanks 1 1 and 12 each bear, facing the flange 14, a projection January 14, respectively 124, which is also provided with a facet 1 15, respectively 125 guide of a protuberance.
• the corridors Ci and C 2 are therefore delimited by the base 10, the rib 13 and its associated sole 14, the inner faces of the flanks 1 1 and 12 and their projections 1 14 and 124 associated.
• the corridors Ci and C 2 are in the form of grooves with convergent edges.
• the corridors Ci and C 2 extend only over part of the longitudinal extent of the cursor, in this case near each of its opposite ends.
• corridors Ci and C 2 are closer to one another at a longitudinal end, so as to allow the spacing or the approximation of the profiles Pi, P 2 according to whether it is desired to close or open the S bag in question. This feature is clearly visible in Figures 2A and 3A, as well as comparing Figures 4A and 7A.
• the technique generally used for this purpose generally consists in deforming the slider so as to temporarily move its flanks 11 and 12 away from each other, to bring it closer to the profiles to "belt” the latter, and then to bring the flanks in their initial position.
• a secondary object of the invention is to provide a device and a method of placing the cursor which simplifies the installation.
• the invention therefore relates to a slider for the actuation of closure profiles, in particular for a closure assembly equipping a bag, comprising a base, two sidewalls, means adapted to respectively urge said closure profiles, in or out according to the direction of movement of the cursor along the profiles, to move the profiles between a position in closing engagement and a separate opening position, and the biasing lugs projecting on said flanks, in the vicinity of the end of those -ci opposite said base, to open temporarily and facilitate its engagement on said profiles when a bias is exerted on said lugs, characterized in that said means comprise means for receiving protrusions associated with said profiles.
• the angle ⁇ formed by said large external faces is of the order of 4 °; the angle ⁇ formed by said facet and the associated wall of said rib is less than 90 °;
• the angle ⁇ formed by said facet and the internal face of said flank is less than 90 °;
• said angle ⁇ is of the order of 85 °; an intermediate part of said lanes has a profile such that they ensure the guiding of said sections during its placement of the cursor on the sections, so that once the cursor is assembled, these channel profiles are then without contact or practically without contact with them
• the invention also relates to a bag comprising a closure system with complementary profiles, provided with a slider actuating said profiles at the opening and closing according to one of the preceding characteristics.
• It also relates to a closure system with complementary profiles, provided with a slider for actuating said profiles at the opening and closing, according to one of the preceding features.
• This device is remarkable in that it also comprises means for pushing a slider towards means for temporarily spacing said flanks of the slider in order to make it cooperate with said profiles, these means for spacing comprising sloping cam paths. ascending adapted to cooperate with said lugs.
• said cam paths have a longitudinal extent smaller than the stroke of said cursor, so that after having crossed the cam paths, the sides of said cursor return to their initial position.
• said cam paths are carried by said clamp.
• the invention relates to a method of placing such a slider on a bag, by means of clamps whose facing faces carry cams with an upward slope.
• This method is characterized in that it comprises the steps of:
• FIGS. 1B to 8B are similar to FIGS. 1A to 8A commented on above, as well as to the additional FIGS. 9 to 13G in which:
• FIG. 9 is a side view of a slider according to the invention.
• FIG. 10 is a view from above of the slider of FIG. 9;
• FIG. 11 is an end view of this slider
• FIG. 12 is a diagram showing, in an end view, the cursor of the previous figures, in relation to cam paths that will allow to separate the flanks;
• FIGS. 13A to 13G are diagrams showing a device for the introduction of a slider such as that of the previous figures, on a bag with complementary closure profiles, these different figures illustrating the main steps of implementation.
• the example of cursor according to the invention which is represented in the figures announced above, has substantially the same general structure as that described above, with reference to the state of the art (FIGS. 1A to 8A). .
• the slider 1 of FIGS. 1B to 8B has projecting lugs 4 projecting on the flanks 1 1 and 12, in the vicinity of the end thereof, which is opposite to the base 10, for the temporarily open and facilitate its engagement on complementary profiles, associated or not with a bag, when a solicitation is exerted on these lugs 4.
• the lugs 4 have the shape of rectangular parallelepipeds, and are integral with the cursor. They extend on the opposite edges 1 12 and 122 of the flanks 1 1 and 12, along the axis XX 'There is provided a lug on the edge of each flank. And these lugs are placed in the vicinity of the free end of the flanks.
• the lugs 4 have, transversely, a thickness identical to that of the songs 1 12 and 122. However, this thickness could be smaller or thicker. Referring to FIG. 8B, it can be seen that the large external faces 1 10 and 120 of the flanks 1 1 and 12 are slightly convergent towards their free end, opposite to the base 10. In the example illustrated here, the angle ⁇ formed by these large external faces is of the order of 4 °. The interest of such a characteristic will be explained later.
• these corridors Ci and C 2 convergent edges have a channel profile, such that they ensure the guidance of complementary profiles during the introduction of the cursor on the profiles. Once the cursor is assembled, these channel profiles are then without contact, or virtually without contact with the complementary profiles.
• FIG. 11 it can be seen that the facets 1 and 140 on the one hand, and on the other hand 141 and 125 form, with the associated walls of the rib 13 and flanks 11 and 12, an angle ⁇ slightly less than 90 °. This angle is for example of the order of 85 °.
• Such orientation of the facets will constitute a fastening element and retaining the protuberances Ti, T 2 associated with the profiles Pi, P 2 of the bag S, thus improving the holding of the cursor on tearing.
• the arrangement of the lugs 4 on the end of the flanks 1 1 and 12 makes it possible to implement a much greater deformation torque than that obtained with ribs conventionally placed on the top of the slider, the lever arm relative to the zone hinge illustrated by reference A of Figure 12 being longer. In this way, the deformation of the flanks is easier, which simplifies the laying of the cursor on a bag.
• the bias at the opening of the sliders and the thrust can be decoupled.
• the bag is part of a band of contiguous bags, which are moved step by step, to equip them in turn with a slider.
• the direction of travel is illustrated by the arrow h in FIGS. 13A and 13G.
• such a device 6 comprises a pair of parallel clamps 7 whose upper jaws are referenced 70, while the lower jaws are referenced 71.
• this device comprises means (not visible) slider feed and pushing these sliders in the direction of the bag to be equipped. In this case, these means are disposed midway between the aforementioned jaws 7.
• a first step of this implementation shown in Figure 13A, is to open the jaws 70 and 71 of each clamp 7 so as to engage the edge of the bag S provided with complementary profiles Pi and P 2 .
• the jaws 70 and 71 are pressed against each other (FIG. 13B), so as to immobilize the bag S.
• FIG. 13B clearly shows the aforementioned cams 5, which are borne by the faces facing the jaws 70 and 71 of the clamps 7.
• a third step illustrated in FIG. 13C the cursor 1 is pushed towards the bag S, so that its biasing pins 4 engage the paths 50 of the cams 5.
• the method according to the invention comprises the steps of:

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• 2007
  • 2007-12-04 FR FR0759545A patent/FR2924312B1/fr not_active Expired - Fee Related
• 2008
  • 2008-11-28 EP EP08858129.3A patent/EP2214972B1/de not_active Not-in-force
  • 2008-11-28 WO PCT/EP2008/066474 patent/WO2009071494A1/fr active Application Filing
  • 2008-11-28 US US12/745,529 patent/US20100310196A1/en not_active Abandoned

Non-Patent Citations (1)

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