EP0273106B1 - Sac à soufflets longitudinaux - Google Patents

Sac à soufflets longitudinaux Download PDF

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Publication number
EP0273106B1
EP0273106B1 EP87113001A EP87113001A EP0273106B1 EP 0273106 B1 EP0273106 B1 EP 0273106B1 EP 87113001 A EP87113001 A EP 87113001A EP 87113001 A EP87113001 A EP 87113001A EP 0273106 B1 EP0273106 B1 EP 0273106B1
Authority
EP
European Patent Office
Prior art keywords
bag
hole
end portion
flange
fold
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
EP87113001A
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German (de)
English (en)
Other versions
EP0273106A1 (fr
Inventor
Rolf Sander
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.)
Wilhelmstal-Werke Papiersackfabriken GmbH
Original Assignee
Wilhelmstal-Werke Papiersackfabriken GmbH
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
Application filed by Wilhelmstal-Werke Papiersackfabriken GmbH filed Critical Wilhelmstal-Werke Papiersackfabriken GmbH
Priority to AT87113001T priority Critical patent/ATE69593T1/de
Publication of EP0273106A1 publication Critical patent/EP0273106A1/fr
Application granted granted Critical
Publication of EP0273106B1 publication Critical patent/EP0273106B1/fr
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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5877—Non-integral spouts connected to a planar surface of the package wall
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls

Definitions

  • the invention relates to a gusseted sack of the type specified in the preamble of claim 1, which is also referred to as a "pinch sack" because of its two longitudinal folds.
  • the lower sack bottom and, after filling the sack, optionally the upper sack bottom are created by folding and gluing the ends of the tube section.
  • the pinch sack When the pinch sack is filled, the fold legs of the two longitudinal folds are stretched and form the narrow sides of the sack, while the bottom of the sack creates a rectangular surface under which bottom triangle folds are located on the narrow sides of the sack.
  • the staggered ends of the pinch sack also create a base with high tear resistance.
  • the invention has for its object to produce an inexpensive gusseted bag of the type mentioned in the preamble, which can be easily filled with liquid or pasty material, if necessary allows portionwise removal of the filling material and allows the remaining filling material to be stored for a long time. This is achieved according to the invention by the measures specified in the characterizing part of claim 1, which have the following special significance.
  • the hose section is formed in one layer and its inner surface is produced by a plastic coating.
  • an inexpensive manufacture of such a side gusseted bag is possible in any case because the two or more tube sections can be produced continuously fully automatically, and the hole or holes can be cut out conveniently and precisely in the tube path.
  • the filler neck protrudes through the wall hole (s), which can also be retrofitted and is attached with its preferably one-piece flange in the edge area around the hole in a liquid-tight manner.
  • the latter can be done by welding or gluing, just as the perforated wall can be clamped between the flange and a counter flange.
  • the plastic-coated hose section or the inner hose made of film already form a liquid-tight inner bag because of the end transverse seam, which allows the absorption of liquid or pasty material without the need for subsequent tightness when folding and gluing the hose end to a bag bottom.
  • the pinch sack produced according to the invention has the new application of serving as a "bottle" that can be closed again and again for liquid or pasty goods.
  • the lid When the lid is closed, the contents are hermetically sealed from the outside.
  • the inner bag When the lid is removed, the inner bag can be comfortably filled with goods and the attached lid protects the filled goods permanently. By losing weight the product can be removed from the lid in small portions via the filler neck without letting the remaining goods spoil, because by re-installing the lid the latter can again be sealed airtight to the outside.
  • the outer tube section is formed from a relatively inextensible material which limits the elasticity of the inner bag and protects the inner bag from damage during transport, storage and removal of goods.
  • the invention according to claim 3 is also environmentally friendly, because the difficult to rot materials of the inner bag film and the filler neck form a structural unit which is connected and can be easily separated from the rest of the outer tube section, which is made of easily decomposable material, such as paper.
  • the outer tube section is made of easily decomposable material, such as paper.
  • Only the inner bag needs to be brought to a special landfill, which is also advantageous because any residues of the contents that are difficult to degrade can remain in the inner bag.
  • the outer section of the hose can easily be left to the usual waste recycling.
  • the web for the inner tube section 12 consists of film material, specifically from a combination of a coextruded polyester and polyethylene film, which are connected to one another over the entire surface and are vapor-coated on one side. Such a combination film is impervious to water vapor and provides good aroma protection.
  • the film material could also be made in the form of a tube from the outset, but when using the combination film, one starts from a web which is initially provided with a perforation which is stepped relative to one another and which later follows the longitudinally offset cutting edges 14 to 17 or 14 ⁇ to 17 ⁇ of the later intermediate 11 of FIG. 2 corresponds.
  • This web, perforated in this way is then folded lengthwise in the form of a tube, the overlapping web edges being connected in a liquid-tight manner by a longitudinal seam, not shown, e.g. through a continuous weld.
  • a paper web is brought to such an inner tube, which can be composed of several layers of paper, but this is not taken into account in the figures. Perforations that are longitudinally offset from one another are also introduced into this paper web, which produce the later cut edges 24 to 27 or 24 24 to 27 ⁇ of the outer tube section 13. If one such a paper web is composed of several layers in itself, these layers can also produce a longitudinal staggering in the later outer tube section 13 of the preliminary product of FIG. 2, by means of correspondingly offset perforations, which is not considered here in greater detail.
  • This paper web is now laid over the inner tube and connected to one another at the overlapping longitudinal points by gluing, as a result of which a continuous envelope tube is produced.
  • the holes 20 and 21 recognizable from FIG. 2 are punched into the two webs, which are at a precisely defined distance 19, 19 19 from one another and from the respective perforations.
  • the hole 20 of the film web for forming the inner tube 12 lies at a defined distance 19 from the perforation line 14 ⁇ and the hole 21 in the paper web producing the outer tube 13 at a suitable distance 19 ⁇ from the associated perforation 24 ⁇ .
  • These sections 19, 19 are matched to one another in such a way that the two holes 20, 21 are exactly congruent with one another after the two tracks have been brought together, as can be seen from FIG. 2.
  • Such a combination hose with common folds 22 arranged on both sides is fed in the next manufacturing stage of such a fully automatic manufacturing process to rupture heads, which separate the different hose layers along the perforations mentioned, as a result of which the two nested hose sections 12, 13 of FIG run longitudinally staggered, as is shown in more detail with reference to the longitudinal section IV-IV in FIG. 4.
  • the inner tube 12 is hatched closely and the outer tube 13 is shown with a large hatch, which results in a different inclined course, depending on whether one looks at the outer surface or the inner surface of the two hose sections 12, 13.
  • the longitudinal staggering of the different cut edges 14 to 17 or 24 to 27 of the two hose sections 12, 13 is significant. Not only the corresponding cut edges of the two hose sections 12, 13 are offset longitudinally by the dimension 31 shown in FIG. 4, but also the cut edges of the two walls 34, 34 ⁇ of the inner tube section 12, namely the cut edges 14, 15, are longitudinally offset from one another by an amount designated by 32 in FIG. 4, in particular as the two walls 35, 35 ⁇ of the outer tube portion 13 assume a considerable longitudinal offset 33 to one another.
  • An analog, albeit smaller, longitudinal offset is also expedient in the area of the cut edges 16, 17, 16 ⁇ , 17 ⁇ or 26, 27, 26 ⁇ , 27 ⁇ which arise due to the longitudinal fold formation 22, as demonstrated at the end of the section 36 ⁇ using the longitudinal offsets 37 ⁇ , 38 ⁇ , 39 ⁇ .
  • the outer hose section 13, however, is still in the form of a hose in the process state of FIG. 6.
  • the two mutually aligned holes 20, 21 come to lie in a zone 43, which is determined by the boundary edge 44 of the triangular region 41 mentioned above.
  • the distance between the two holes 21, 22 from the end transverse seam 40 and the corner region 41 is dimensioned such that there remains an annular zone 45 shown in dash-dotted lines in FIG. 6 for the later fastening of the flange of a filler neck, as shown in FIGS. 9 to 15 is seen.
  • FIG. 7 shows the folded position of this end flap 47.
  • the transverse folding line 46 which is relevant for the folding over of the end flap 47 is also a certain length 48 relative to the innermost cutting edge 25 ⁇ of the outer tube section 13 reset. 4 and 5, the individual layers in the folded end flap 47 are glued to the surface of the wall 35 'of the outer hose section 13. This significantly increases the strength of the connection.
  • a sack bottom 50 which can only be seen in its upper half in the flat state of the structure of FIG. 7.
  • the other half of the bag bottom lies beyond the fold line 46 and has an analog shape because of the analog welds of a corner region 41 carried out there.
  • the ends of the inner bag 42 provided with the transverse seam 49 are also folded over and thus integrated into the bag bottom 50.
  • the inner bag 42 has its own welding closure 40, 41, but is part of the common bag bottom 50.
  • the pinch sack 10 is thus finished with respect to its sack body and is now also provided with a filler neck 51, the basic structure of which can best be seen from the sectional view in FIG. 10.
  • the filler neck 41 is produced in one piece from plastic and consists of a tube piece 52 and a flange 53 running vertically to the tube axis.
  • the flange is flexible and can be pressed together and by a buttoning movement through the two holes 20, 21 into the sack interior shown in FIG. 10 57 can be engaged.
  • it is connected to the inner surface of the inner bag 42 in a liquid-tight manner by a welded connection 58 or by gluing.
  • the filler neck 51 thus becomes an integral part of the finished sack 10.
  • tube section 52 protrudes through the two Holes 20, 21 to the outside and the tube opening 54 can be closed by a cover 55 shown in FIG. 1, it being possible for there to be any connection between the cover and the connecting piece.
  • a screw thread 56 is used, which can be seen better in the special embodiment of FIGS. 13 to 15.
  • a bayonet connection could also be used instead of a screw connection. It is crucial that the cover 55 can be loosened from the filler neck 51 again and again and attached to it in order to seal the contents of the bag in an airtight manner.
  • Such a finished pinch sack 10 can be filled with liquid or pasty material via the assembled filler neck 51, as a result of which the sack is transferred from the flat state in FIG. 7 to the voluminous filling state in FIG. 1, where the sack assumes the shape of a cuboid .
  • the two longitudinal folds 22 of the sack unfold, as shown in FIGS. 8 and 9.
  • the two fold legs 28, 29 pass into an extended position.
  • the folding tip 23 of FIG. 3 is pressed outwards.
  • the two legs 28, 29 of the previous longitudinal fold 22 thus determine the narrow side 59 of the sack that can be seen in FIGS. 1 and 9.
  • the broad side 60 is determined by the dimension 60 between the two longitudinal folds 22, which can already be seen in the flat state of the two sections 12, 13 of FIG. 2.
  • the bag bottom 50 has a rectangular outline that results from the dimensions 59, 60. Due to the folded end flap 47, the two welded corner areas 41 lying one above the other in the flat state of FIG. 6 on the longitudinal folds 22 come to lie side by side, as can be seen from FIG. 1, and form an overlapping part 61 of the bag bottom 50 in the spread Filling state of the sack 10. Under this overlapping part 61 there is a fold formation between the two corner points 62 of the sack 10, which can be seen in FIG.
  • the hole 20 is as close as possible to the one cathete 67, but at a certain distance, so that there is sufficient space for the welding attachment of the flange 53 from the filler neck 51.
  • This filler neck 51 is located, as can be seen from FIG. 1, in that bottom half 68 of the finished sack bottom 50 which is not reinforced by the flap 57 flipped over.
  • the crease line 64 at the bottom triangular fold 65 also continues on the two broad sides 60 of the bag with a crease edge 69. When the pinch sack 10 is filled, the two folded edges 69 delimit the rectangular sack bottom 50 from the surfaces 59, 60 of the sack jacket.
  • 10 to 12 show a device for welding attachment of the described filler neck 51 when the flange 53 has been coupled into the bag interior 57.
  • the coupling of the flange 53 is normally carried out, as already mentioned, through the openings 20, 21 of the bag.
  • FIG. 10 Only when the filler neck 51 is fastened is the other section end 36 of the two hoses 12, 13 treated in the manner shown in FIGS. 6 and 7 in this case.
  • the situation of FIG. 10 is present at first, where the device shown schematically becomes effective in the following way:
  • a plurality of links 85 are introduced into the interior of the bag through the pipe opening 54 and the pipe section 52, which have a run-up slope 86 at their end and via a joint 87 or a flexible point with an associated guide piece 88 are connected.
  • the link 85 buckles because its run-up slope 86 abuts against the inner surface of the inner bag wall 34 and slides along it and thereby moves under the flange 53 of the connecting piece 51.
  • FIGS. 10 to 12 only one link 85 is shown in FIGS. 10 to 12, but the device has a group of links 85 which are arranged in a centrally symmetrical arrangement with respect to the tube axis and can be spread apart in the course of the movement 89, 91. It is thereby achieved that in the final state of FIG. 12, the flange 85 is engaged behind by such links 85 practically along its entire circumference.
  • a welding unit 90 which consists of segments or a circumferential ring, of which only a schematic cross section can be seen in FIGS. 11 and 12, is now moved up and is pressed against the flange 53 from above in the direction of arrow 92 in FIG. 12, which on the underside, as already mentioned, is engaged by the links 85.
  • the links 85 thus act as an abutment for the welding unit 90, which now leads in a manner known per se to a melting of the plastic from the flange 53 and the inner surface of the upper wall 34 ′ from the inner bag 42. This can be done by high frequency, ultrasound, radiation or contact heat.
  • the links 85 are not only an abutment, but also prevent gluing to the inner surface of the other wall 34 of the inner bag 42.
  • the links 85 are formed from silicon-coated aluminum or from a suitable plastic which is heat-resistant and prevents sticking. It only comes to the weld connection 58 shown in FIG. 12 of flange 53 and bag wall 34ack.
  • connection 58 After connection 58 has been completed, tools 90, 85 are moved back again in the reverse direction.
  • the links 85 are moved with their guide pieces 88 against one another and are pulled axially out of the pipe piece 52 again.
  • the flange 53 can also be inserted between the two walls 34 ⁇ , 35 ⁇ of the two hose parts 12, 13 in order to be welded to the underside of the flange on the surface of the inner wall 34 ⁇ in a similar manner. Then the pipe section 52 protrudes outward only through the outer hole 21, while the inner hole 20 lies flush with the opening of the flange 53.
  • FIGS. 13 to 15 show a form of a filler neck 51 which is particularly favorable with respect to FIGS. 10 to 12 and which could be fastened in the manner already described for a pinch sack 10 according to the invention.
  • the same reference numerals are used to designate corresponding parts as in the first exemplary embodiment, which is why the previous description applies to this extent. It is sufficient to only deal with the differences.
  • the pipe section 52 is formed here from sections 72, 73 which are different with regard to their wall thickness 94, 95 and its pipe diameter 70, 71, between which a flexible transition piece 96 is arranged.
  • the diameters 70, 71 are dimensioned such that, in the starting position of FIG. 14, the two tube sections 72, 73 can be pushed into one another and thereby form the two legs of a circumferential U-profile, the U-apex is generated by the transition piece 96.
  • the two pipe sections 72, 73 are consequently nested one inside the other and a pot-shaped cover 55 can engage with its pot jacket 74 screwed onto a screw thread 56 of the inner pipe section 72 in the U-space between the two pipe sections 72, 73.
  • the flange-like protruding pot bottom 75 comes to lie approximately flush with the outer surface 76 of the bag bottom, indicated by dash-dotted lines in FIG. 14.
  • the filler neck 51 no longer protrudes from the sack in a disturbing manner.
  • the flange 53 of the filler neck 51 is formed on the upper end of the outer tube section 73 and can have a wall thickness 95 corresponding to it.
  • the thicker wall thickness 94 of the inner tube section 72 makes it relatively stiff and ensures the shape of the screw thread 56 located thereon. Because of the thinner wall thickness 95, the tube section 73, in particular its U-shaped apex 96 and its kink transition 77 provided for the flange 53, are flexible.
  • the flange 53 is firmly connected in the aforementioned ring zone 45 around the hole 20 of the inner bag 42 via a welded or adhesive connection 78.
  • FIG. 13 shows the top view of the filler neck 51 before it is attached.
  • the pot base 75 is enclosed by two semicircular brackets 79 which, in the starting position, lie in the plane of the pot base 75, with which they are connected by two solid diametrical spokes 80.
  • the apex zones of the two brackets 79 can be connected to the pot bottom 75 via tearable thin webs 81 and lie in the same plane. Even after the pinch sack 10 has been filled, the webs 81 should be undamaged.
  • the bracket 79 enclosing the pot bottom 75 is grasped and swung up by tearing the webs 81 in the direction of the arrow 82 of FIG. 15 into the position 79 ⁇ , where they can be undercut by a finger 83.
  • the attachment points 94, indicated in FIG. 13, of the two brackets 79 with respect to the solid spokes 80 on the pot base 75 act as flexible hinges.
  • the brackets are, as is clear from FIG. 14, in a plane above the above-mentioned bag surface 76, so that there is easy access for the finger 83 of the hand. With the finger 83, the cover 55 is now pulled. Because in the initial position of FIG.
  • the cover 55 is in screw engagement with the inner tube section 72, this is pulled along and reaches the inverted position shown in FIG. 15.
  • the inner pipe section 72 now lies axially next to the outer pipe section 73 of the filler neck 51.
  • the flexible material is resiliently deformed both in the area of the previous U-shaped apex 96 and at the kink transition 77 to the flange 43.
  • the kink transition 77 deforms by 180 °.
  • the U-apex 96 provides an arcuate transition between the two different-diameter pipe sections 72, 73.
  • the flange 53 is held back by the overlapping walls of the inner bag 42 and outer hose 13 when the inner pipe section 72 is pulled up, and consequently none is im Solution-acting load exerted on the weld joint 78.
  • the cover 55 can be easily unscrewed from the screw thread 56, the ones in the upward position 79 ⁇ Serve as a wing for turning handling.
  • 15 shows the cover 55 in the state detached from the pipe socket 42.
  • This protruding position of the pipe sections 72, 73 characterizes the position of use of the pipe socket 42, the foremost pipe section 72 of which acts as a pouring spout when goods are removed.
  • the cover 55 can be put back on the threaded front tube section 72 and screwed on, after which the two tube sections 72, 73 can be returned from their protruding position of FIG. 15 to their nested starting position of FIG. 14 by applying axial pressure.
  • the holes 20, 21 could also be arranged in the region of the longitudinal folds 22 which later produce the narrow side 59 of the bag. In this case, they are advantageously arranged in the vicinity of the bag bottom 50.
  • a single-layer hose section could also be used, the inner surface of which is coated with a plastic material is provided, which is of the same nature as the film of the inner tube section 12 described so far.
  • This plastic layer takes on the function of the inner tube section previously described and is provided with the end cross-seam 40 and the corner regions 41 described, as a result of which the effect of the inner bag 42 described above is created.
  • the bag bottom 50 is produced in an analogous manner. Because of the single-layer nature of such a coated hose section, of course only one hole is required, in which the filler neck 51 is to be mounted in the manner described.
  • a reinforcing sheet (not shown in more detail) is used, which is attached to the perforated wall 35 or 34 of the inner and / or outer hose section 12, 13.

Claims (9)

  1. Sac à soufflets latéraux (sac à pinces 10) formé d'un tronçon de tube souple (12, 13) à une ou plusieurs couches, comportant, d'une part, des parois de tube souple (34, 34' ; 35, 35') décalées entre elles dans le sens de la longueur et des soufflets longitudinaux (22) qui constituent deux petits côtés opposés (59) du sac (10) rempli et dont les deux ailes (28, 29) forment un pli (23) dirigé vers l'intérieur lorsque le sac (10) vide est à plat et, d'autre part, un fond de sac (50) qui est réalisé par rabattement (49) et collage d'une extrémité (36, 36') du tronçon et qui, lorsque le sac est plein, constitue une surface rectangulaire et recouvre deux goussets triangulaires de fond (65) s'ouvrant chacun sur un petit côté (59) du sac, caractérisé en ce que, dès avant la formation du fond du sac, les surfaces intérieures (34, 34') du tronçon de tube souple, qui sont en matière plastique et reposent l'une sur l'autre lorsque le sac (10) est à plat, sont rendues solidaires l'une de l'autre, notamment par soudage, par une liaison transversale d'extrémité (40), en ce que l'une des parois (34, 35) du sac (10) comporte un trou (20 ; 21) à proximité du gousset triangulaire de fond (65) et en ce qu'un embout de remplissage (51), comportant, à une extrémité, un capuchon (55), notamment amovible, et, à l'autre extrémité, une collerette (53), traverse le trou (21) par sa tubulure (52), mais est fixé (en 58 ; 78) par sa collerette (53), d'une manière étanche aux liquides, sur la zone marginale (45) de la matière plastique (34, 34') qui entoure le trou (20).
  2. Sac à soufflets latéraux suivant la revendication 1, caractérisé en ce qu'une feuille de renfort est disposée dans la zone du trou (20 ; 21).
  3. Sac à soufflets latéraux suivant l'une des revendications 1 et 2, caractérisé en ce que le sac (10) est formé de deux tronçons de tube souple (12, 13) enfilés l'un dans l'autre et décalés dans le sens de la longueur, en ce que le tronçon de tube souple intérieur (12) consiste en une feuille de matière plastique dont les deux parois (34, 34') comportent la liaison transversale d'extrémité (40) et forment un sac intérieur (42) étanche par lui-même aux liquides, en ce que l'extrémité fermée (36) du sac intérieur (42) est rabattue (49) et collée en commun (47) avec l'extrémité ouverte (36') du tronçon de tube souple extérieur (13) pour former un fond de sac (50) commun, en ce que l'une des parois (34) du sac intérieur (42), d'une part, et l'une des parois (35) du tronçon de tube souple extérieur (12), d'autre part, comportent respectivement des trous alignés (20 ; 21), et en ce que la collerette (53) de l'embout de remplissage (51) est fixée (en 58 ; 78) sur la zone marginale (45) de la paroi de feuille (34) qui entoure le trou (20) du sac intérieur (42).
  4. Sac à soufflets latéraux suivant la revendication 3, caractérisé en ce que la collerette (53) est fixée sur la surface intérieure de la paroi de feuille (34) présentant le trou (20).
  5. Sac à soufflets latéraux suivant l'une ou plusieurs des revendications 1 à 4, caractérisé en ce que le ou les trous (20, 21) sont situés dans la zone (66) du fond de sac (50) se trouvant entre les deux goussets triangulaires de fond (65).
  6. Sac à soufflets latéraux suivant la revendication 5, caractérisé en ce que le ou les trous (20, 21) sont situés dans les moitiés (68) du fond de sac restant non recouvertes lors du rabattement (49) et du collage du fond de sac (50).
  7. Sac à soufflets latéraux suivant l'une des revendications 5 et 6, caractérisé en ce que le ou les trous (20, 21) sont voisins de l'un des goussets triangulaires de fond (65).
  8. Sac à soufflets latéraux suivant l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que les deux parois (34, 34') du tronçon de tube souple (12) sont en outre rendues solidaires l'une de l'autre, notamment par soudage, dans les zones de coin (41) qui, lorsque le sac (10) est à plat, sont situées au-dessus et/ou au-dessous des deux soufflets longitudinaux (22) et qui, lorsque le sac (10) est plein, constituent la partie (61) du fond de sac (50) recouvrant le gousset triangulaire de fond (65).
  9. Sac à soufflets latéraux suivant l'une ou plusieurs des revendications 1 à 8, caractérisé en ce que les deux extrémités (36, 36') du tronçon de tube souple (12) sont pourvues de liaisons transversales d'extrémité (40) pendant que le sac (10) est à plat et avant la formation de fonds de sac, puis sont repliées de façon à former les deux fonds de sac (50) et en ce que l'embout de remplissage (51), qui comporte une collerette (53), notamment une collerette souple, est agencé de façon à pouvoir être accouplé ultérieurement dans le ou les trous (20, 21) en vue de sa fixation.
EP87113001A 1986-12-03 1987-09-05 Sac à soufflets longitudinaux Expired - Lifetime EP0273106B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87113001T ATE69593T1 (de) 1986-12-03 1987-09-05 Seitenfaltensack.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863641337 DE3641337A1 (de) 1986-12-03 1986-12-03 Seitenfaltensack
DE3641337 1986-12-03

Publications (2)

Publication Number Publication Date
EP0273106A1 EP0273106A1 (fr) 1988-07-06
EP0273106B1 true EP0273106B1 (fr) 1991-11-21

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Application Number Title Priority Date Filing Date
EP87113001A Expired - Lifetime EP0273106B1 (fr) 1986-12-03 1987-09-05 Sac à soufflets longitudinaux

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EP (1) EP0273106B1 (fr)
AT (1) ATE69593T1 (fr)
DE (2) DE3641337A1 (fr)

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Publication number Priority date Publication date Assignee Title
US4986805A (en) * 1989-10-18 1991-01-22 Baldwin/Green Inc. Firefighter's portable water reservoir and method of making the same
UY24496A1 (es) * 1996-03-22 1997-09-08 Amcor Ltd Paquete de carne
AU5047198A (en) * 1996-10-22 1998-05-15 Bericap Gmbh & Co. Kg Container with a built in spout
DE102010051579B4 (de) 2010-08-06 2021-11-11 Segezha Packaging Gmbh Papiersack

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US3687356A (en) * 1965-06-28 1972-08-29 St Regis Paper Co Gusseted type bags
US3365116A (en) * 1967-04-27 1968-01-23 Bemis Co Inc Multi-ply bag
DE3151701A1 (de) * 1981-12-29 1983-07-07 Bischof Und Klein Gmbh & Co, 4540 Lengerich Flexibles verpackungsbehaeltnis aus faltbarem material in form eines sackes oder beutels

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DE3641337A1 (de) 1988-06-16
EP0273106A1 (fr) 1988-07-06
ATE69593T1 (de) 1991-12-15
DE3774678D1 (de) 1992-01-02

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