Classifications

• • 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
• • 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
  • B31B2160/00—Shape of flexible containers
  • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/53—Means to assemble or disassemble

Definitions

• the present invention relates to the field of bags provided with complementary closure profiles actuated by a slider.
• It relates more particularly to a device and a method for setting up a slider on a bag with complementary closure profiles.
• French patent application 07 59545 filed on December 4, 2007 in the name of the present applicant, describes a device and a method for placing a slider on a bag with closure profiles, this slider being provided with protruding lugs protruding on its flanks, in the vicinity of the end thereof opposite its base, to open temporarily and facilitate its engagement on the closure profiles, when a bias is exerted on the lugs.
• US Pat. No. 6,161,271 discloses a slider installation device which makes use of a carousel.
• a cursor is placed in a receptacle and a pusher acts on its base, with a view to its ejection.
• the edges of the slider come into contact with triangular-shaped stops slidably mounted along divergent guide walls. When the cursor moves, its wings push the stops that force the free ends of the bag to get closer to each other.
• the present invention aims to fill the gap described above by proposing a device and a method that allows the introduction of a slider on a bag with closure profiles, this slider being devoid of said projection pins protruding, and this without make use a carousel whose structure and functioning are, by definition, complicated.
• the present invention relates to a device for setting up a slider for actuating closure profiles, in particular for a closure assembly equipping a bag, which comprises a base, two flanks and means adapted to respectively urge said closure profiles, towards or away in the direction of movement of the cursor along the profiles, to move the profiles between a closed position and a separate position of opening, on a bag with complementary closure profiles or on a set of complementary closure profiles, this device comprising at least one retaining clip in the stable position of the profiles, as well as means for pushing a slider towards means for temporarily moving said flanks slider to cooperate with said profiles in a stable position, these means for spreading including paths s of rising cam.
• said means consist of retractable cams which, in a first non-retracted position, interact with said slider, so that during its displacement, the internal face of its flanks comes into contact with the cam paths. to remove them progressively from one another, and which, in a second retracted position, no longer interact with said cursor, so that said flanks are close to each other, the passage of the first to the second position being by contact of the base of said cursor with said cams, during the displacement of said cursor.
• said cams are cams with a pivot axis, the passage from the first to the second position being made by pivoting about this axis;
• said axis extends in a plane generally parallel to that in which the base of said cursor is contained;
• said retaining means consist of springs; said cams have a bevelled face, the passage from the first to the second position being effected by a wedge effect, when said base of the slider comes into contact with this bevelled face;
• each pair being positioned to come into contact with the same side of said cursor; said pairs are separated by a positioning interval of said profiles;
• said stops are each integral with a jaw of said clamp
• the said stop is retractable and is adapted to be moved to the retracted position in which it does not immobilize said profiles, when said cursor is in place thereon.
• Another aspect of the invention relates to a method for setting up a slider on a bag with complementary closure profiles, this slider comprising a base, two sidewalls and means adapted to respectively urge said closure profiles, in approximation or moving away in the direction of movement of the cursor along the profiles, to move the profiles between a closed position and a separate open position, using tongs, which method comprises the steps of: a) open the jaws of each clamp and engage the edge of the bag provided with complementary profiles; b) tighten the jaws to immobilize the bag; c) pushing said slider towards the bag, to gradually move its flanks from one another to engage the profiles, then gradually move its flanks from one another to lock on said profiles.
• this process is remarkable in that during step c):
• flanks of said slider are progressively spread apart by means of retractable cams which, in a first non-retracted position, interact with said slider, so that during its displacement, the internal face of its flanks comes into contact with the cam paths; upward slope carried by these cams to gradually move away from each other;
• flanks are then brought closer by displacing said cams in a second retracted position in which the internal face of the flanks is no longer in contact with the up-slope cam paths;
• cams are used which have a bevelled face, the passage from the first to the second position being operated by wedge effect, when said base of the slider comes into contact with this bevelled face.
• FIG. 1 is a partial view and simplified according to a longitudinal and vertical median sectional plane of a device according to the invention
• FIGS. 2A to 7A are partial views of the device of FIG. 1, intended to illustrate the various steps of the method according to the invention
• Figures 2B to 7B are enlarged views of the region of Figures 2A to 7A corresponding, marked by a circle;
• Figures 2C to 7C are views similar to Figures 2A to 7A, cut by the plane indicated in these figures;
• FIGS. 9A and 9B are perspective views of a cam of the aforementioned device
• FIGS. 9C and 9D are side and top views of this cam
• FIGS. 10A to 14A are simplified side views of a cursor and associated cams, in different positions illustrating the main steps of the method
• Figures 10B to 14B are similar to Figures 10A to 14A, the sliders and cams being seen this time from above.
• the device for positioning a slider is a device of a generally known type for positioning the slider on pouches with profile sections. complementary closure.
• the general structure of such a device is described in the document FR-A-2076728.
• the device illustrates the introduction of a slider 1 on a bag S provided with complementary profiles Pi, P 2 .
• each profile Pi, P 2 is supported by a band 4 (or is an integral part of such a band). These two strips are both respectively attached to the inner face of two films 2 and 3, constituting the large faces of the bag S to be equipped.
• the device 6 comprises a pair of parallel displacement grippers 7 whose upper jaw is referenced 70, whereas the lower jaw is referenced 71.
• Each jaw is in a way composed of two parallel half-jaws, integral with each other.
• the upper jaw 70 consists of two half-jaws 700 which are the image of one another with respect to a longitudinal axis YY 'perpendicular to the axis of displacement of the bag S.
• each jaw The two half-jaws of each jaw are separated from each other by a channel C identified in Figure 2C, Y-axis Y '.
• this device comprises non-visible slider feed means 1.
• These sliders can be packaged in bulk and distributed by vibratory bowls with an accumulation magazine or be arranged in a chain following one another. other.
• such a device comprises slider feed means whose operation is enslaved to that of the other organs which constitute it, and in particular to those which allow the laying of said cursor on the profiles.
• the device is provided with a jack 61 double effect whose free end of the rod carries a piston 60 or pusher.
• This piston is able to slide according to predetermined advance sequences inside the above-mentioned channel C along the axis YY '.
• an unrepresented space for receiving a new cursor 1 to put in place.
• the forward and return piston movements are referenced as arrows g and h in Figure 1.
• the two half-jaws 700 of the upper jaw 70 (and this applies to the lower jaw 71) comprise a cavity 701 arranged transversely and whose opening opens out facing the second half-jaw.
• each cavity 701 is disposed a retractable cam 5, which will be explained later structure and function.
• a stop 72 which has a nose 720 which extends inside the above-mentioned channel C . It is a retractable stop, this stop being slidably mounted on rods 721 on which are fitted helical springs 722. These tend to bring the stop 720 into its position shown in Figure 2C in which the nose 720 is engaged inside the channel C.
• FIGS. 9A to 9D describe the retractable cams mentioned above.
• each half-jaw is equipped with a cam 5. They are all identical and mounted so as to be the image of one another in a mirror. One will therefore be content to describe one, this description also valid for others.
• the cam 5 in question is visible in perspective in FIG. 9A.
• It comprises an upper body 51, a lower body 53 and an intermediate portion 52.
• the upper body 51 is substantially in a rectangular parallelepiped whose upper and lower faces are referenced 512 and 513.
• X-X ' has been referred to as the axis of this orifice.
• a rotation shaft is fitted thereon so as to be able to subject the cam to a rotational movement with respect to this axis.
• the upper body 51 continues, on the side of its lower face 513, by an intermediate portion 52, which gives it a profile in steps.
• This intermediate portion is connected to a lower body 53 which extends in part in the extension of the upper body.
• the latter comprises two longitudinal faces 530 whose mutual spacing is greater than that of the faces 51 1 of the upper body.
• one of the faces 530 extends in the same plane as the face 51 1 disposed on the same side.
• the lower body thus protrudes laterally to form, on its upper face, a cam track with an upward slope 50, this ascending slope originating on the side of the upper body 51, in the direction of the free end of the lower body 53 .
• the aforementioned face 530 is connected to the beveled pan 531 by a lug 532.
• cams 5 are mounted in the device so that the lower body 53 is engaged in the cavities 701 above.
• Helical springs 5 ' are mounted in these cavities and bear on the face 530 opposite the cam path 50, and tend to urge them so that the body 53 protrudes from the cavity 701.
• cam paths 50 and the cutaway 531 extend, as shown in FIG. 2C, inside the channel C when the cams 5 occupy their first non-retracted position.
• the cavity 701 is shaped to also accommodate the upper body 51 and its pivoting axis.
• FIG. 2B This is a plastic slider 1 of the current type which comprises a base 10 and two parallel flanks 11 and 12 and means 13 which extend parallel to the flanks 11 and 12 from the base 10 and which are adapted to respectively urge the profiles Pi, P 2 closure closer or away in the direction of movement of the cursor along these profiles.
• the flanks 1 1 and 12 have sufficient elasticity to be spaced apart from one another in order to allow the establishment of the profiles Pi, P 2 inside the corridors which are delimited by the means 13 and the two sides 1 1 and 12.
• the method according to the invention is broken down as follows. In a preliminary step that corresponds to FIGS. 2A to
• the jaws 70 and 71 of the clamp 7 are spaced apart from each other in the open position.
• Mechanized means that make it possible to scroll a band of sachets to be fitted with sliders position a bag and immobilize it in line with said clip, as shown in FIG. 2A.
• a cursor 1 is brought inside the device, in the channel C, using means not shown.
• the jaws 70 and 71 are closed on the profiles Pi, P 2 .
• the movable stops 72 are arranged so as to tightly press against each other these profiles and, constantly solicited by the springs with which they are equipped, they oppose any inadvertent movement thereof in the direction of the arrow g, that is to say in a direction away from the slider 1.
• the piston or pusher 60 of the cylinder 61 is then moved progressively in the direction of the arrow g, so as to come to rest against the base 10 of the slider and move it towards the Pi and
• flanks 1 1 and 12 will deviate from one another so as to release a sufficiently large space between them and the means 13, to allow the engagement of Pi, P 2 profiles.
• This contact is made at the beveled face 531 which, by wedge effect, causes the rotation of the cams about the axis X-X ', so that they move progressively inside the cavities 701.
• the movable stops 72 recede against the springs that equip them, while maintaining on the profiles a counterpressure that promotes the insertion of the end of these profiles in the slider.
• the cams 5 continue their rotation, so that they are always penetrating in the slider 1 whose flanks continue to deviate from one another.
• the cams 5 Under the action of the base 10 of the slider, the cams 5 continue their rotation against the springs 5 'and when the base 10 of the slider has reached the pins 532 of the cams 5, they then retract completely inside. cavities 701 so that they escape the slider 1, which has the effect that the flanks 1 1 and 12 are closed on the profiles Pi, P 2 .
• the piston 60 is driven so as to move back in the direction of the arrow h under the effect of the stress exerted on the profiles Pi, P 2 by the mobile stops 72.
• slider 1, snapped onto the Pi, P 2 profiles, also moves backwards.
• the lateral faces of the cams 5 are then in contact with the outer lateral faces of the slider 1 so that only the stubs 532 penetrate slightly into the slider.

Landscapes

• Bag Frames (AREA)
• Slide Fasteners (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=41226626

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (4)

• 2009
  • 2009-01-21 FR FR0950359A patent/FR2941136B1/fr not_active Expired - Fee Related
• 2010
  • 2010-01-14 DK DK10700546.4T patent/DK2391503T3/en active
  • 2010-01-14 EP EP10700546.4A patent/EP2391503B1/de active Active
  • 2010-01-14 US US13/145,524 patent/US20120030919A1/en not_active Abandoned
  • 2010-01-14 WO PCT/EP2010/050373 patent/WO2010084068A1/fr active Application Filing

Non-Patent Citations (1)

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