EP0951989B1 - Verfahren zur Herstellung verschliessbarer Beutel - Google Patents

Verfahren zur Herstellung verschliessbarer Beutel Download PDF

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Publication number
EP0951989B1
EP0951989B1 EP99400946A EP99400946A EP0951989B1 EP 0951989 B1 EP0951989 B1 EP 0951989B1 EP 99400946 A EP99400946 A EP 99400946A EP 99400946 A EP99400946 A EP 99400946A EP 0951989 B1 EP0951989 B1 EP 0951989B1
Authority
EP
European Patent Office
Prior art keywords
film
bag
web
sealing
strips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99400946A
Other languages
English (en)
French (fr)
Other versions
EP0951989A1 (de
Inventor
Steven Ausnit
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.)
Flexico France SARL
Original Assignee
Flexico France SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR9804913A external-priority patent/FR2777498B1/fr
Application filed by Flexico France SARL filed Critical Flexico France SARL
Publication of EP0951989A1 publication Critical patent/EP0951989A1/de
Application granted granted Critical
Publication of EP0951989B1 publication Critical patent/EP0951989B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2525—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener located between the fastener and the product compartment
    • 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
    • B65D33/2541—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 characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • 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
    • B31B70/8133—Applying the closure elements in the cross direction

Definitions

  • the present invention relates to the field of machines for forming, filling and closing automatic packaging, comprising closure devices, for example with complementary male and female profiles.
  • Such machines are often called FFS, corresponding to the initials of the English expression "Form, Fill and Seal machines”.
  • the document US 4,909,017 describes a method in which sachets are provided with a closure device, during their formation on an FFS machine.
  • the bags are formed from a film of thermoplastic material.
  • the film is in the form of a strip of material extending between two longitudinal free edges with reference to its displacement. This film is unrolled upstream of a filler neck.
  • the closure device is disposed on the film, also upstream of the chute, transversely to the direction of movement of the film.
  • the closure device is composed of two strips provided with complementary profiles.
  • a first band of the closure device is welded to the film upstream of the chute, on a portion of the film intended to form a first wall of the bag.
  • the bag is then formed by wrapping the chute and welding the two longitudinal edges of the film.
  • the second closure band is then welded downstream of the chute to a second bag wall.
  • the document US 4,655,862 also discloses a method of forming reclosable bags on FFS machines, in which pouches are provided with a closure device which is arranged perpendicular to the direction of formation of these bags.
  • This closure device is deposited upstream of the filler neck, on a film in the form of a single strip.
  • This band comprises at least one folding zone transverse to the band, so as to be able to fold the band on itself and to put in opposite, regions of the band able to cooperate together to ensure the closure of the bag.
  • the document US-A-5,431,760 discloses a bag closure device comprising a control slider and two webs extending laterally on at least one side of an assembly of one or more profiles.
  • the Applicant has desired that the steps of holding, welding and placing the closure device on the film is easier to achieve than that of the processes described in the aforementioned documents.
  • the sails of the closure device confer on the invention a certain number of advantages. Due to its larger cross-sectional area, a device for carrying out the method according to the invention is easily carried and positioned. In addition, the sails can be set at temperatures low enough to avoid damaging the profiles.
  • Each band 2, 4 comprises webs 6, 8 and sections 10, 12.
  • the sections 10, 12 extend longitudinally on the strips 2, 4.
  • the profiles 10, 12 have shapes capable of cooperating with each other in a complementary manner.
  • said male section has a cross-section, a shape arrowhead, it can be introduced and maintained in engagement with the section 12, said female section, throat-shaped.
  • Each strip 2, 4 may comprise several profiles 10, 12 similar to, for example, those described above. These profiles are then parallel to each other.
  • the strips 2, 4 respectively comprise a first web 6 and a second web 8 which extend widely laterally on one side of the profile (s) 10, 12.
  • this first web 6 and this second web 8 may be replaced by a first 6 and a second 8 parts of a single web for joining the two bands 2,4.
  • the closing devices 1 Figures 1a and 1b comprise two complementary sections 10, 12, each supported by one of the two parts 6, 8 of a single U-shaped web in section transverse to the longitudinal direction of the profiles 10, 12.
  • the profiles 10, 12 of the device 1 of closure of the figure 1a are close to the bottom of the groove of the U.
  • the profiles 10, 12 of the closure device 1 of the figure 1b are near the free ends of the branches of the U.
  • the sails 6, 8 of the closure device 1 of the figure 1c are independent of each other.
  • the profiles 10, 12 of the closure device 1 of the figure 1c are close to a free sail edge 6, 8.
  • These devices are particularly adapted to be fixed on the film 50 since the surface of the webs 6, 8 is such that it makes it possible to perform a welding of these webs 6, 8 on the film 50 on an area of these which does not not found under the profiles 10, 12. This facilitates the establishment of the closure device 1 and the welding thereof on the film 50.
  • At least one web 6, 8 extends laterally over an area at least equal in surface to that located under the profiles 10, 12.
  • the method according to the invention is used to form sachets 30 on an FFS 100 machine.
  • the step of fixing the first web 6 on a film 50 is performed upstream of a filling chute 130 of the FFS machine 100.
  • figure 2 there is shown a portion of the film 50 for forming bags 30.
  • the film 50 moves towards the chute 130 in the direction indicated by the arrow D.
  • the film 50 has two longitudinal free edges 52, 54, parallel to its direction of movement.
  • a closure device 1 Crosswise with respect to the direction of movement of the film 50, is provided a closure device 1. This device 1 is oriented on the film 50, so that the sections 10, 12 are generally perpendicular to the longitudinal edges 52, 54 of the film 50.
  • This device 1 may be one of the three devices 1 represented in FIG. figure 1 or one of those presented below or any device 1 adapted to the implementation of the method according to the invention.
  • the device 1 has a length approximately equal to half the size of the film 50, taken perpendicular to its direction of displacement D.
  • the device 1 can be placed near one of the longitudinal free edges 52, 54.
  • the device 1 is fixed approximately centrally with respect to the two longitudinal free edges 52, 54.
  • a device 1 is guided, pulled or pushed by roller means and / or by a reciprocating mechanism to be positioned on the film surface 50.
  • the device 1 is arranged on the film 50, so that one of the two strips 2, 4 is laid flat on one side of the film 50, on a portion of the film 50 capable of forming a film.
  • first wall of bag 30 On the figure 2 it is the web 2 provided with the web 6 which rests on the surface of the film 50.
  • the device 1 is advantageously provided, prior to its positioning on the film 50, with two weld spots 42, 44. Each is located at a longitudinal end 3, 5 of the strips 2, 4, more precisely at the level of the profiles 10, 12, and thus contributes to sealing the closure device 1.
  • first transverse welding means 110 comprise a transverse welding bar 112 and two longitudinal bars 114 with respect to the direction of movement D of the film 50.
  • the length of the welding bar 112 is approximately equal to that of the device 1 to set up and fix on the film 50.
  • the two welding bars 114 are located at the ends of the welding bar 112, perpendicular to this, and have a length approximately equal to the width of the device 1.
  • the welding bars 112, 114 are then lowered and pressed on the edge of the webs 6, 8 together or independently of one another.
  • the step of fixing the first web 6 on the film 50 is carried out only by the longitudinal ends 3, 5 of the strips 2, 4, thanks to the longitudinal welding bars 114.
  • the fixation of the first web 6 on the film 50 is carried out thanks to the welding bar 112, only on the edge of the web 6 intended to be towards the outside of the bag 30 with respect to sections 10, 12, when this bag 30 will be formed.
  • the attachment of the first web 6, upstream of the chute is achieved by combining the two previous variants,
  • the fixing of the first web 6 is performed at at least two points 47, 49 located on either side of the profile 10 supported by the web 6, this section being considered relative to its longitudinal direction .
  • the first web 6 is thus integral with the film 50, at a point situated towards the front and at a point situated towards the rear, with respect to the direction of displacement D. This makes it possible to prevent the device 1 from turning around. during the formation of the bag 30 on the chute 130 ( Fig. 2 and Fig. 21 ).
  • a machine according to the present invention can also make it possible to carry out this variant of the method according to the invention.
  • the fixation of the closure device 1 on the film 50 can be performed, before formation of the bag 30, simultaneously with the production of the weld spots 42, 44.
  • the device 1 is conveyed on the film 50 without that the weld points 42, 44 have been made.
  • suitable longitudinal welding bars 114 weld the longitudinal ends 3, 5 of the strips 2, 4 by the same operation as that which produces the soldering points 42, 44.
  • FIG. 3 On the figure 3 , is shown the formation of a bag 30 from the film 50, around the chute 130.
  • the film 50 provided with the device 1 is fed to the chute 130. It is then wrapped around this chute 130.
  • the longitudinal free edges 52, 54 are brought back to one another, parallel to the axis of the chute 130, to be welded to one another by means of longitudinal welding means 120 capable of forming a longitudinal weld 40. thus folding the film 50, longitudinally with respect to its direction of displacement, a second wall 34 of the bag 30 is formed.
  • a bag 30 has two longitudinal folds 31, 33, an opening closed by the device 1, and is hermetically sealed by the longitudinal weld 40 and a transverse weld 46.
  • the transverse weld 46 extends between the longitudinal folds 31, 33 and is located on the edge of the walls 32, 34 opposite longitudinally to the device 1.
  • second transverse welding means 116 are represented on the figure 4 . These second transverse welding means 116 are adapted to fix the second web 6 of the device 1 to the second wall 34 of bags 30 downstream of the chute 130.
  • the second transverse welding means 116 make it possible both to weld the device 1 to the walls 32, 34 and to form the transverse weld 46.
  • the cutting means 140 are integrally mounted to the second transverse welding means 116, in order to proceed to the cutting of the successive bags 30. These cutting means 140 are able to form a transverse cut with respect to the displacement of the film 50.
  • the second transverse welding means 116 are each provided with a groove 117.
  • This groove 117 extends over the entire length of the second transverse welding means 116.
  • the grooves 117 of each of the second welding means 116 are in contact with each other. face to face and are turned towards each other to form a cavity.
  • These grooves 117 make it possible not to weld between them the walls 32, 34 on a small transverse zone, downstream of the closure device. This transverse zone makes it possible to form tongues 36, 38 making it possible to grip the walls 32, 34 so as to spread them and to open the bag 30.
  • the closure device 1 for implementing the method according to the invention comprises a closing slider 9.
  • This closing slider 9 can be of any known type and suitable for putting the profiles 10, 12 into engagement with each other in a first direction and disengaging them from each other when moved in a second opposite direction to the first.
  • the film manufacturing method 50 according to the invention must be adapted.
  • it comprises a step consisting in conveying a film 50 provided with first cut-outs 51 upstream of the chute 130.
  • the first cut-outs 51 are able to allow easy access to the closing slider 9 over the entire length of the profiles 10, 12.
  • they are of a shape and dimensions that are slightly smaller than those of the closure device 1.
  • the method according to the invention then comprises a step of positioning a closure device 1 at each of the first cutouts 51, upstream of the filler neck 130.
  • the closure device 1 is already provided with the closing slider 9 and the longitudinal ends 3, 5 are possibly already welded together by welding points 42, 44.
  • the closure device 1 is thus positioned so that the closing slider 9 is on the longitudinal edge of the closure device 1, located forwards, taking for reference the direction of movement D of the film 50. At least 1 one of the webs 6, 8 is then welded to the film 50 at at least one edge of the first cutouts 51, by virtue of the first transverse welding means 110.
  • the film 50 thus provided with closure devices 1 is shaped as a tube around the chute 130.
  • a longitudinal weld 40 is formed by the longitudinal welding means 120.
  • a second cut 53 is made downstream of the longitudinal welding means 120. This second cutout 53 is made in the film 50, opposite the first cut 51. This second cut 53 has a shape and a dimension equivalent to those of the first cuts 51.
  • the second cuts 53 are made by means of a blade 135. If this blade 135 is located at the chute 130, it is curved.
  • the welding of the closure device 1 is then completed by the second transverse welding means 116.
  • the shape of these second transverse welding means 116 is adapted for welding closure devices 1
  • transverse welding means 116 Examples of such transverse welding means 116 are illustrated by the Figures 4A and 5A .
  • the second transverse welding means comprise an opening 118.
  • This opening 118 is parallel to the benefits 10, 12 and of length approximately equal to that of these profiles 10, 12.
  • the width of this opening is sufficient for the welding rods second welding means 116 are not applied to the closing slider 9 during the welding of the closure device 1 on the film 50.
  • the welding means 116 thus weld on the film 50 only the sails 6, 8 of the closing device 1, possibly with the longitudinal ends 3, 5 of the strips 2, 4.
  • the second welding means 116 thus form the transverse seals 46 and 48 of the bag 30.
  • the second transverse welding means 116 have a U-shape in transverse section.
  • This form provides grooves 117 forming a cavity which is adapted to receive the profiles 10, 12 and the closing slider 9, without deforming them when the welding bars of the second welding means 116 are pressed against each other for form the transverse welds 46 and 48.
  • peelable welding strips 18, 20 are arranged between the webs 6, 8 on the side of these webs 6, 8 intended to be towards the inside of the bag 30.
  • the chute 130 is provided with a longitudinal groove capable of guiding the closing sliders 9 during the passage of the closure devices 1 on this chute 130.
  • figure 6 represents a closing device 1 provided, in addition to its webs 6, 8 and its sections 10, 12, of two strips 18, 20 able to form a peelable weld. These strips of peelable weld 18, 20 extend over the entire length of the device 1, at the edges of the free ends of the webs 6, 8. This peelable weld 18, 20 therefore joins the sails 6, 8, or parts of the sails, the side that will be located towards the outside of the bag 30 relative to the profiles 10, 12, after complete formation of this bag.
  • the figure 7a illustrates, at the second transverse welding means 116, the positioning and welding of the device 1 on the walls 32, 34.
  • the device of the figure 6 is represented in closed configuration.
  • the peelable seal strips 18, 20 are presolded to one another.
  • the free edge of one of the webs 6, 8 of the device 1 is fixed to the wall 34 by means of the first welding means 110.
  • the peelable solder strips 18, 20 are not presolded and are then welded together and on the wall 34 during the operation of fixing the web 6 on this wall 34 by the first welding means 110.
  • all the walls 32, 34, webs 6, 8 and strips of peelable weld 18, 20 is welded by the second transverse welding means 116.
  • the fixing of the device 1 on the walls 32, 34 is completed, simultaneously with the formation of the weld 46 and the cutting of the walls 32, 34, between the solder 46 of a bag and the closure device 1 of the next bag ( Fig. 7b ).
  • the groove 117 of the second transverse welding means 116 makes it possible to keep two zones of the unsealed walls 32, 34 in order to form tabs 36, 38 on the side of the sections 10, 12 located towards the outside of the bag 30. .
  • a closure device provided with two protective strips 14, 16. These protective strips 14, 16 extend over the entire length of the longitudinal free edges of the webs 6, 8. These protective strips are provided with a layer barrier on their faces brought to be opposite, which allows the protective strips not to weld together.
  • the device 1 is welded to the walls 32, 34 with second transverse welding means 116, not provided with grooves 117.
  • the walls 32, 34 are welded to the device 1 at the same time at the level of the peelable sealing strips 18, 20 and at the level of the protective strips 14, 16. But the protection strips 14, 16 are not welded together. There are thus tabs 36, 38 adapted to grip the walls 32, 34 of the bag 30 to proceed to the opening of the latter.
  • the figure 10 schematically represents a closure device 1, provided with a line of perforations 22.
  • This line of perforations 22 is, when the device 1 is in the open position between the profiles 10 and 12, approximately equal distance from each.
  • This line of perforations 22 extends over the entire length of the device 1 at the bottom of the U-shaped groove formed by it, when it is in closed configuration. After opening the bag 30, separating the strips of peelable solder 18, 20 and the complementary profiles 10, 12, the device 1 is torn at the level of the perforation line 22.
  • the figure 11 represents a variant of the device 1 presented to the figure 10 .
  • a thin web 7 forms the groove of the U between the sections 10, 12.
  • This thin web 7 can easily be torn to open the bag 30 but it offers, as long as it is intact, a means for sealing additional device 1 closure. If this web 7 extends sufficiently, it can turn towards and between the webs 6, 8 when the contents of the bag 30 is poured, to protect the sections 10, 12 of the contents of the bag 30.
  • the sections 10, 12 thus protected remain clean and able to cooperate effectively with each other, when it is desired to close the bag 30.
  • This veil 7 can also form a funnel or pouring spout when it is pulled out of the bag 30 ( Fig. 12 ).
  • the web 7 consists of two roughly trapezoidal elements arranged one on the other and linked together on the two non-parallel edges of the trapeziums and on the short edge of the two parallel edges.
  • the length of the one of the two parallel edges of the trapezium which is the longest, is equal to the dimension of the bag 30 transversely with respect to the direction of displacement D of the film 50.
  • These two nonparallel edges are welded between and with the longitudinal ends 3, 5 with respect to the strips 2, 4.
  • a closure device 1 further comprising strips of peelable weld 18, 20, the complementary profiles 10, 12 and the webs 6, 8, a sealing membrane 26.
  • This membrane 26 is welded over the entire length of the device 1, for example near the peelable seal 18, between this peelable solder strip 18 and the profile 10.
  • This sealing membrane 26 extends laterally towards the other section 12 by covering the section 10.
  • the figure 14 shows the device 1 shown in figure 13 in closed position. We then see that the sealing membrane 26 is taken between the sections 10 and 12.
  • the figure 15 represents a device similar to that of Figures 13 and 14 , with the difference that it comprises two sealing membranes 26 each welded to one of the webs 6, 8.
  • FIGS. 16 to 20 represent variants of a closure device 1 comprising at least one peelable solder strip 18, 20, 21 and a line of perforations 19.
  • FIG 16 there is shown a device 1 which has a single peelable solder strip 21 fixed between the webs 6 and 8.
  • the line of perforations 19 is on the edge of the peelable solder strip 21 located towards the outside of the bag 30 and between the sails 6 and 8.
  • This line of perforations extends over the entire length of the device 1. It makes it possible to tear the peelable weld more easily when the walls 32 and 34 are moved apart to open the bag 30.
  • the figure 17 represents a device 1 in the open configuration.
  • the perforation line 19 is located between the sections 10 and 12, approximately equal distance from each of them, at the joint of the webs 6 and 8. Strips of peelable weld 18, 20 along this line of perforations 19 over the entire length of the closing device 1.
  • the figure 18 represents, in the closed position, the device 1 of the figure 17 fixed to a bag 30.
  • a bag 30 To open the bag 30, its walls 32, 34 are spread, which induces a stress between the webs 6 and 8 and causes the tearing of the line of perforations 19.
  • This bag 30 may optionally be closed again. pressing on one another the strips of peelable weld 18 and 20, if they are for example adhesive strips. This then ensures a greater seal than with the only cooperation of the profiles 10, 12 with each other.
  • the Figures 19 and 20 represent a closing device such as that shown in Figures 17 and 18 , further comprising a sealing membrane 26.
  • This sealing membrane 26 is welded to the web 8, close to the peelable welding strip 20 and extends laterally above the section 12.
  • the figure 21 represents a closure device attached to a film 50 (for example before passing over the filling chute 130 of an FFS machine).
  • This device 1 consists of two webs 6, 8 joined together to form a U.
  • the sail 6 is fixed to the film 50 by two welding points 47, 49, located on the web 6 on either side of the direction longitudinal of the profile 10. These welding points 47, 49 may be made before folding the device 1 on itself to cooperate the sections 10, 12 between them.
  • the welding points 47, 49 may be more or less extended in the longitudinal direction of the strips 2, 4. They may also extend over the entire length of the device 1.
  • the device 1 can not be retained to the film 50 only by a single 49 of these welding points 47, 49.
  • the point 49 is the one situated downstream with respect to the displacement D of the film 50, so as to avoid a reversal of the device 1 to the passage on the filler neck 130.
  • one of these welding points 47, 49 is located on the side of the profiles 10, 12 which will be inside the bag 30 once it formed. In this case, no equivalent welding point will be made opposite, on the second web 8. In this way, a hinge configuration is formed which offers a better resistance to an internal pressure of the bag 30 (FIG. figure 22 ).
  • the invention also extends to a machine for manufacturing a film 50 for forming bags 30, comprising first transverse welding means 110, with respect to the direction of movement of the film 50, capable of fixing a closing device 1 provided with webs 6, 8 on the film 50.
  • closure devices 1 are fixed to the film 50 only by a first web 6. Bags 30 can then be shaped and completed from of this film 50 provided with closure devices 1, either on a bag-forming machine 30 to be used and subsequently filled, or on an FFS machine.
  • the invention therefore also extends to a machine for forming, filling and automatic closing, which comprises first transverse welding means 110, upstream of a filler chute 130 and second transverse welding means 116 downstream of the trough 130.
  • first transverse welding means 110 upstream of a filler chute 130
  • second transverse welding means 116 downstream of the trough 130.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Bag Frames (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)

Claims (25)

  1. Herstellungsverfahren für Beutel (30), welches die Schritte umfasst, die darin bestehen, eine durchgehende Folie (50) zu bewegen und sequentiell auf der Folie (50) und quer zu deren Bewegungsrichtung (D) eine Schließvorrichtung (1) zu befestigen, die ein erstes Band (2) umfasst, das wenigstens ein Schließprofil (10) in Eingriff mit einem anderen, zu ihm komplementären Schließprofil (12) trägt und von einem zweiten Band (4) oder einem Teil des ersten Bandes (2) getragen wird, das/der später auf der Folie (50) befestigt wird, wobei jedes Band (2,4) wenigstens eine Hülle (6,8) umfasst, die sich seitlich auf einer Seite des oder der Profils/-e (10,12) erstreckt, das/die von jedem Band (2,4) getragen wird/werden,
    dadurch gekennzeichnet, dass die
    Schließvorrichtung (1) einen Steuerungsschieber (9) umfasst, und dass es das Vornehmen von Aussparungen (51,53) auf der Folie umfasst, um den Zugriff auf den Schließschieber (9) freizugeben.
  2. Herstellungsverfahren für Beutel (30), welches die Schritte umfasst, die darin bestehen, eine durchgehende Folie (50) zu bewegen und sequentiell auf der Folie (50) und quer zu deren Bewegungsrichtung (D) eine Schließvorrichtung (1) zu befestigen, die ein erstes Band (2) umfasst, das wenigstens ein Schließprofil (10) in Eingriff mit einem anderen, zu ihm komplementären Schließprofil (12) trägt und von einem zweiten Band (4) oder einem Teil des ersten Bandes (2) getragen wird, das/der später auf der Folie (50) befestigt wird, wobei jedes Band (2,4) wenigstens eine Hülle (6,8) umfasst, die sich seitlich auf einer Seite des oder der Profils/-e (10,12) erstreckt, das/die von jedem Band (2,4) getragen wird/werden,
    dadurch gekennzeichnet, dass die
    Schließvorrichtung (1) einen Steuerungsschieber (9) umfasst, und dass es einen Schritt des Führens des Schiebers (9) in einer Längsrille einer Bildungs- und Füllrinne (130) der Beutel umfasst.
  3. Verfahren gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Schritt des Befestigens durch Verschweißen der Folie (50) mit wenigstens einem Bereich der Hüllen (6,8) durchgeführt wird, der unterschiedlich zu dem unter den Profilen (10,12) ist.
  4. Verfahren gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass wenigstens eine Hülle (6,8) sich seitlich über einen Bereich erstreckt, der wenigstens flächengleich zu dem unter den Profilen (10,12) ist.
  5. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Beutelbildung (30) auf einer automatischen Bildungs-, Füllungs- und Schließmaschine umfasst.
  6. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung einer Schließvorrichtung (1) auf der Folie (50) umfasst, die zwei komplementäre Profile (10,12) umfasst, wobei jede von einem der beiden Teile (6,8) gegenüber einer einzigen Hülle in U-Form, im Querschnitt bzgl. der Längsrichtung der Profile (10,12) getragen wird.
  7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, dass es die Befestigung einer Schließvorrichtung (1) auf der Folie (50) umfasst, die mit einer Perforationslinie (19,22) zwischen den Profilen (10,12) und in gleichem Abstand zu jedem von ihnen versehen ist.
  8. Verfahren gemäß einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, dass ein Schritt des Befestigens einer ersten Hülle (6) auf der Folie (50) oberhalb einer Füllrinne (130) der automatischen Bildungs-, Füllungs- und Schließmaschine durchgeführt wird.
  9. Verfahren gemäß einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass ein Schritt des Befestigens einer zweiten Hülle (8) auf einer zweiten Wand (34) des Beutels (30) unterhalb einer Füllrinne (130) der automatischen Bildungs-, Füllungs- und Schließmaschine durchgeführt wird.
  10. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung der Schließvorrichtung (1) umfasst, so dass sich die Profile (10,12) senkrecht zu den Längsrändern (52,54) der Folie (50) befinden.
  11. Verfahren gemäß Anspruch 10, dadurch gekennzeichnet, dass es die Befestigung des Schließprofils auf zentrierte Weise bzgl. der Längsränder (52,54) der Folie (50) umfasst.
  12. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Befestigung der ersten Hülle (6) auf der Folie (50) an Längsenden (3,5) der Bänder (2,4) durchgeführt wird.
  13. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung einer Schließvorrichtung (1) auf der Folie (50) umfasst, die eine zwischen die Profile (10,12) genommene Dichtheitsmembran (26) umfasst.
  14. Verfahren gemäß einem der Ansprüche 1 bis 11 und 13, dadurch gekennzeichnet, dass die Befestigung der ersten Hülle (6) auf der Folie auf dem Rand der Hülle (6) durchgeführt wird, der bestimmt ist, in Richtung des Äußeren des Beutels (30) bzgl. der Profile (10,12) gelegen zu sein.
  15. Verfahren, dadurch gekennzeichnet, dass es den in Kombination genommenen Ansprüchen 12 und 14 entspricht.
  16. Verfahren gemäß einem der Ansprüche 1 bis 11 und 13, dadurch gekennzeichnet, dass der Schritt des Befestigens der ersten Hülle (6) auf der Folie (50) in einem einzelnen Punkt (49) durchgeführt wird, der an der Seite der Profile (10,12) liegt, die sich im Inneren des Beutels (30) befinden wird, wenn dieser einmal gebildet ist.
  17. Verfahren gemäß einem der Ansprüche 1 bis 11 und 13, dadurch gekennzeichnet, dass der Schritt der Befestigens der ersten Hülle (6) auf der Folie (50) mit wenigstens zwei Punkten (47,49) durchgeführt wird, die auf der Hülle auf beiden Seiten einer Längsrichtung des Profils (10) gelegen sind.
  18. Verfahren gemäß einem der Ansprüche 1 bis 11 und 13, dadurch gekennzeichnet, dass der Schritt des Befestigens der ersten Hülle (6) auf der Folie (50) mit einem Schweißpunkt durchgeführt wird, der an der Seite der Profile (10,12) liegt, die sich im Inneren des Beutels (30) befinden wird, wenn dieser einmal gebildet wurde und dadurch, dass es nicht mit einem äquivalenten, gegenüber auf der zweiten Hülle (8) gelegenen Schweißpunkt durchgeführt wird, wobei diese Konfiguration insbesondere erlaubt, ein Scharnier zu bilden, das einen besseren Widerstand einem Druck im Inneren des Beutels (30) entgegensetzt.
  19. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung eines Schließprofils (1) auf der Folie (50) umfasst, das eine abziehbare Schweißnaht (18,20,21) umfasst, welche die Hüllen oder Hüllenteile (6,8) an der Seite verbinden, die zum Äußeren des Beutels (30) bzgl. der Profile (10,12) nach vollständiger Bildung dieses Beutels (30) gelegen ist.
  20. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung einer Schließvorrichtung (1) auf der Folie (50) umfasst, indem es einen nicht-geschweißten Bereich der Wände (32,34) des Beutels (30) der Seite der Profile (10,12) bewahrt, die zum Äußeren des Beutels (30) hin gelegen ist.
  21. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung eines Schließprofils (1) auf der Folie (50) umfasst, das zwei Schutzbänder (14,16) umfasst, die nicht miteinander verschweißt werden, um zum Ergreifen der Wände (32,34) des Beutels (30) geeignete Laschen (36,38) zu bilden.
  22. Verfahren gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es die Befestigung einer Vorrichtung (1) auf der Folie (50) umfasst, die eine zum Bilden eines Ausgusses oder eines Trichters geeignete Membran (7) umfasst.
  23. Verfahren gemäß einem der Ansprüche 1 und 3 bis 22, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, oberhalb einer Bildungs- und Füllrinne (130) der Beutel eine Folie (50) zu befördern, die mit ersten Aussparungen (51) versehen ist, die auf der Folie in einem Abstand gleich der Ausdehnung eines Beutels (30) in der Richtung parallel zur Bewegung (D) der Folie (50) voneinander beabstandet sind.
  24. Verfahren gemäß Anspruch 23, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, die Schließvorrichtung auf Höhe jedes der ersten Aussparungen (51) zu positionieren und wenigstens eine der Hüllen (6,8) auf die Folie (50) auf Höhe wenigstens einer Kante der ersten Aussparungen (51) dank erster Schweißmittel (110) zu schweißen.
  25. Verfahren gemäß einem der Ansprüche 23 und 24, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, eine zweite Aussparung (53) in der Folie (50) gegenüber der ersten Aussparung (51) unterhalb von Längsschweißmitteln (120) durchzuführen.
EP99400946A 1998-04-20 1999-04-19 Verfahren zur Herstellung verschliessbarer Beutel Expired - Lifetime EP0951989B1 (de)

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Application Number Priority Date Filing Date Title
FR9804913A FR2777498B1 (fr) 1998-04-20 1998-04-20 Procede et machine de formation de sachets d'emballage avec dispositif de fermeture
FR9804913 1998-04-20
FR9806292 1998-05-19
FR9806292A FR2777499B1 (fr) 1998-04-20 1998-05-19 Procede et machine de formation de sachets d'emballage avec dispositif de fermeture

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EP0951989B1 true EP0951989B1 (de) 2008-03-19

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FR2777499B1 (fr) 2000-07-07
FR2777499A1 (fr) 1999-10-22
US20040023772A1 (en) 2004-02-05
EP0951989A1 (de) 1999-10-27
DE69938373D1 (de) 2008-04-30
US20040038791A1 (en) 2004-02-26
US6928791B2 (en) 2005-08-16
US20040023777A1 (en) 2004-02-05
US6983574B2 (en) 2006-01-10
US20020072460A1 (en) 2002-06-13
US20040023776A1 (en) 2004-02-05

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