EP0626921B1 - Container made of flexible material, method and installation for its fabrication - Google Patents
Container made of flexible material, method and installation for its fabrication Download PDFInfo
- Publication number
- EP0626921B1 EP0626921B1 EP93905396A EP93905396A EP0626921B1 EP 0626921 B1 EP0626921 B1 EP 0626921B1 EP 93905396 A EP93905396 A EP 93905396A EP 93905396 A EP93905396 A EP 93905396A EP 0626921 B1 EP0626921 B1 EP 0626921B1
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- EP
- European Patent Office
- Prior art keywords
- film
- containers
- container
- weld seams
- welding
- 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
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Classifications
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- 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
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- 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
- B31B2155/00—Flexible containers made from webs
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- 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
- B31B2155/00—Flexible containers made from webs
- B31B2155/002—Flexible containers made from webs by joining superimposed webs, e.g. with separate bottom webs
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- 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
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
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- 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
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/10—Feeding or positioning webs
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- 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
- B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
- B31B70/844—Applying rigid valves, spouts, or filling tubes
Definitions
- the present invention relates to a container made of flexible material, which can be produced in particular from sheets or films of synthetic material, simple or complex, which is capable of receiving a liquid, viscous or pulverulent product to be poured for its use.
- This invention also relates to a method of manufacturing the container in question, and to an installation intended for implementing the method of manufacturing said container.
- these containers are limited in their uses.
- such containers have a relatively limited capacity compared to their size, and are hardly suitable for large volumes, especially volumes greater than one liter.
- Adapting these containers to large volumes would require an exaggerated increase in their height, with the harmful consequences of a lack of rigidity and a reduction in their stability in the standing position.
- a container of this kind has already been proposed having a generally cylindrical or frustoconical appearance, and having an upper part on which a plug is fixed (see the German utility model DE-U-8908015).
- the upper part is made of a flexible sheet separate from that constituting the side faces, hence a need for assembly by welding between the side faces of the container and its upper face.
- this upper face supporting the cap is itself not very rigid, which makes the use of the container inconvenient.
- the present invention also aims to eliminate these latter drawbacks.
- the upper part is made of the same material as the side faces, this upper part comprising a central zone situated at the top. of the container, on which the cap is fixed and, on either side of the central zone, two substantially triangular zones which sink between the two lateral faces, so as to define "hollows", and which are connected by a top at points of the lateral welds located at a distance below the top of the container, while the stopper has a square or rectangular base, located in the central zone of the upper part of the container and occupying substantially the entire extent of this central area.
- the generally cylindrical or frustoconical shape of this container leads to a significant increase in its volume, the invention making it possible to envisage capacities of up to 2 liters or more.
- the stopper located in the upper part naturally allows the pouring and the filling of the container, which on the whole achieves the equivalent of a bottle, a bottle or a small can, standing upright even partially emptied, while presenting additional advantages resulting from its flexibility: absence of re-entry of air during the pouring of the content, hence a perfect liquid jet, and possibility of flattening after use, so that the container forms a waste of minimum volume.
- the presence of the stopper with its base is also advantageous, in that it strengthens and stiffens the upper part of the container and that it provides a point of grip for guiding and handling the container during its manufacturing process.
- the cap can be easily unscrewed and screwed back, without twisting the container.
- the stopper also advantageously has, above the base, a flange defining lateral grooves which can be used for guiding and holding the stopper and / or of the entire container during its manufacturing process which will be defined below.
- the plug can be located in an asymmetrical position, at a shorter distance from the top of a lateral weld than from the top of the other weld lateral, the two "hollows" of the upper part being of unequal importance, so as to facilitate pouring.
- the asymmetrical position of the plug allows the addition of a handle in the form of a gripping tab, projecting above the upper face of the base in the region not comprising the plug, the tab being made of '' one piece with the base, which further facilitates the use of the container.
- the manufacturing of the containers is thus ensured continuously, from two heat-sealable films, one of which corresponds to the upper part and to the lateral faces, and the other of which corresponds to the bottoms of the containers, with fixing of the caps during the process of manufacturing, welding of the plugs on the first film still flat guaranteeing easy fixing of these plugs.
- the installation of the plugs at a position located upstream of the manufacturing line makes it possible to then use these plugs to guide the first film, to pull it downstream precisely and to then handle the individual containers resulting from the cut made between the side welds.
- the first film is deformed so as to be brought into a folded "T" configuration, the plugs being positioned in the upper position, and the production of the welds, including the welds fixing the folds of the upper part of the containers, is produced in this "T" configuration, the separation of the containers then allowing their elongation with the formation of the aforementioned "hollows".
- simultaneous line or curvilinear welds of the bottoms and the welds fixing the folds of the upper part are carried out simultaneously, then in a later step the lateral welds of the containers.
- the elongation of the containers after their separation is obtained by inflating these containers through their stopper.
- This inflation operation gives the containers their final configuration, causing them to lengthen with unfolding of the folds of the upper part and formation of "hollows".
- the former includes a horizontal flat guide supporting the upper part of the first film provided with the plugs, and two converging lateral guide bars, so as to bring progressively the first film in a "T" configuration, a device with heating jaws being provided downstream of this shaper, for fixing the folds of the upper part of the containers by welding.
- the heating jaw device for fixing the folds of the upper part of the containers by welding, is associated, in the same welding station, with a double station for welding the bottoms of the containers. ; this welding station is followed by a station carrying out the lateral welds of the same containers. The following stations ensure the pulling of the strip formed by the two films combined, then the separation of the containers by cutting according to their lateral welds.
- the installation according to the invention also comprises, beyond the cutting station ensuring the separation of the containers, a device for gripping, driving and inflating the separate containers, where these containers are taken and driven by their caps. , and inflated through their caps to receive their final configuration.
- the installation may also include, downstream of the previously detailed device, means for individually taking up the containers, filling these containers and screwing the caps; these latter means can be produced in the form of a turret, and make it possible to have a complete production line, supplying at its outlet filled and closed containers, ready to be dispatched.
- the container which is the subject of the invention a first embodiment of which is shown in FIGS. 1 to 4, is designated by the reference 1 and has a general cylindrical or frustoconical appearance, and it is essentially constituted by two opposite lateral faces 2, by a bottom 3 and by an upper part 4 on which a plug 5 is placed.
- the container 1 is mainly made of sheet or film of flexible heat-sealable synthetic material, the plug 5 naturally being made of a more rigid material.
- the two lateral faces 2 and the upper part 4 of the container result from the same sheet of flexible material, folded in "U” or in "W” as specified below, which has previously received the stopper 5 having a base 6 square or rectangular.
- the bottom 3 results from another flexible sheet, added.
- the two lateral faces 2 are joined to one another by substantially vertical lateral welds 7 and 8, which extend over the entire height of the container. Between the two welds 7 and 8, in the central zone 9 where the plug 5 is fixed, the upper part 4 is substantially flat and the sheet of flexible material here forms an inverted "U", as shown in the sectional view of the FIG. 2. This central zone 9 corresponds to the widest part of the container 1.
- the container On either side of the central zone 9 provided with the stopper 5, the container gradually narrows to a practically zero thickness corresponding to the vertical welds 7 and 8, the upper part 4 forming in section an "W" reversed like the 'illustrate Figures 3 and 4.
- the central area 9 There are thus, on either side of the central area 9, two substantially triangular areas 10 and 11 which extend by lowering between the two side faces 2, and which connect by a vertex respectively 12,13 at points of the vertical welds 7 and 8, located at a certain distance d below the top of the container.
- the triangular zones 10 and 11 are thus fixed by the welds 7 and 8.
- these two triangular zones 10 and 11 which define respective "hollows” in the form of tetrahedra on either side of the central zone 9, are advantageously of unequal lengths, this asymmetry bringing the plug 5 closer together. of one of the vertical welds 7 or 8 and thus facilitating the pouring of the contents of the container.
- the lower part of the container also has, in section, the shape of a "W", curvilinear welds or in broken lines ensuring the sealed connection of the added base 3 with the two lateral faces 2, the starting points of the welds 14 are located on the vertical welds 7 and 8 at a certain level above the base of the container.
- the principle of such a bottom 3, forming a bellows, is well known for example by French patent No. 1349272, and it will not be described in more detail.
- a container 1 of flexible material of large capacity is thus obtained, which remains upright even when it is partially emptied, and which can be capped after use. Thanks to the square or rectangular shape of its base 6, the plug 5 placed on the upper part 4 can be easily unscrewed and re-screwed.
- the flexibility of the container 1 makes the liquid jet perfect because there is no re-entry of air, unlike a rigid container such as a bottle.
- one of the vertical welds 8 may include an enlarged upper part 15, for example of trapezoidal shape, possibly pierced with an opening 16, which forms a handle facilitating the gripping of the container for opening / closing the cap 5 and for pouring the liquid.
- This container can also be laid flat in a negligible space, when it is empty, either for its delivery to a place where it will be filled later, or after its use.
- the flexible container 1, described above, can be produced from complexes of the polyester-polyethylene type, or polyester - aluminum - polyethylene, or polypropylene - polyethylene, or alternatively complexes including polyamide, comprising at least one face made of hot-melt material . Sheets or films of pure polyethylene or other unique heat-sealable material can also be used. In the case of complexes of which one face is difficult to weld, it is advisable to provide cutouts, such as those indicated in 17 and 18 in FIG. 1, to form vertical welds 7 and 8 effectively joining the two lateral faces 2 over their whole height despite the local insertion, between these faces 2, of the bottom 3 and of zones 10 and 11 of the upper part 4.
- the base 6 of the plug 5 is also fixed by welding to the central zone 9 of the upper part 4. It will be noted that this plug 5 also includes, above the base 6, a flange 19 making it possible to define lateral grooves useful in the manufacturing process of the container.
- FIGS 6 to 8 show another embodiment, in which the elements corresponding to those previously described are designated by the same references.
- the plug 5 is here located in an asymmetrical position relative to the base 6, therefore at a shorter distance from the top of the side weld 7 than from the top of the other side weld 8, which facilitates pouring.
- the use of the container is facilitated by the presence of a handle 15 in the form of a thin gripping tab, protruding above the upper face of the base 6 in the region without the cap. 5, the tab 15 being produced in one piece with the base 6.
- the stopper 5 always comprises, at a low height above the base 6, a flange 19 which defines an annular groove facilitating the guiding and the holding of this stopper 5 and / or of the whole of the container 1.
- Two ribs 19A and 19B diametrically opposite, here provided between the flange 19 and the base 6, allow to block in rotation the stopper 5 and the entire container 1, when tightening between two opposite jaws belonging to an automatic gripping device.
- FIGS. 6 to 8 show by way of example a gripping handle 15 having the appearance of a "T”
- FIG. 9 illustrates a variant in which the handle 15, still integral with the base 6, has the configuration of a closed handle, which proves more advantageous, in the case of a larger container 1, therefore heavier when full.
- FIG. 10 illustrates another variant, in which the screw cap is replaced by a tubular endpiece 5A initially closed by a welded cover 5B, which leads to a simpler and more economical embodiment in the case of a container not requiring to be filled in.
- FIGS. 11 and 12 The installation for manufacturing the container 1 described above is shown, as a whole, in FIGS. 11 and 12. It comprises a support for a reel 20 of printed film, of horizontal axis 21, with a roller drive device tangential 22. A set of rollers 23 ensures, downstream of the reel 20, a constant tension of the film 24, necessary for its alternating printing. A set of photoelectric cells 25 and 26 makes it possible to control the unwinding of the coil 20, at two speeds, one of which is slightly higher than the desired average speed, and the other of which is slightly lower than this average speed. .
- a device 33 for drawing the film 24, describing an alternating movement under the action control means The printing device 33 operates with a correction effect of the advance position, thanks to a photoelectric cell, which makes it possible to carry out all the preceding operations at very exact locations depending on the printing of the film 24. in particular, the base 6 is always welded to the film 24 at the precise location required. Jaws 34 for blocking the film 24 are provided in the downstream part of the device 33.
- a roller 35 with a horizontal axis, in permanent rotation, which prevents the film 24 from making a "wave" when the drawing speeds are fast. Downstream of the roller 35, the film 24 forms a soft strand 36. So far, this film 24 retains a flat configuration, without wrinkles.
- the film 24 passes over a generally triangular shaping device, narrowing downstream. In this zone, the film 24 thus passes from a flat configuration to a configuration folded first in an inverted “U” then tightened in "T", the plugs 5 being positioned in the upper part, and the lateral parts of the film 24, corresponding to the side faces 2 of the containers, "falling" downwards.
- the film 24 first folded in an inverted “U” gradually progresses to a "T” conformation, its two lateral “drooping" parts being brought together one of the other until practically one comes into contact with the other.
- the upper part of the film 24 is supported by a horizontal flat guide 37, while, on either side of the lateral parts of the film 24, two converging lateral guide bars 38 are provided.
- Guide rollers 42 bring the film 41, coming from the reel 40, to a horizontal guide located under the upper part of the film 24. Between the reel 40 and this guide is provided a punching device 43 which prepares the film 41 for welding.
- the next station 50 performs vertical welds, becoming the lateral welds 7 and 8 of the containers 1, by means of two pairs of heating jaws 51 and 52, followed by a pair of cooling blocks 53, details of this station 50 being shown in Figure 17.
- Elastic heating blocks 54 and 55 are inserted into one of the jaws 51 and 52 of each pair, opposite the other jaw, to compensate for the differences in thicknesses resulting from the variable number (two or four) parts of films to be welded together.
- the next station 56 ensures the pulling in front of the strip, formed by the two films 24 and 41 welded one to the other, this station 56 comprising a pair of vertical bars 57, as well as an upper support member 58.
- a cutting station 59 is provided, ensuring the separation of the containers 1 according to the vertical welds 7 and 8, associated with a device 60 for gripping, driving and inflating the separate containers 1, where these containers are taken. and swollen with air or other gas by their caps 5.
- the containers 1, removed and inflated by the device 60 still undergo a final operation of welding the tabs located at their upper corners, this operation being provided by a last welding station 61 followed by a cooling station 62.
- the containers 1, empty but swollen, are finally taken up on a turret 63, driven in rotation discontinuously about a vertical axis 64, which presents these containers 1 at stations successively ensuring their filling with precise dosing, placing them in 65 screwed closure caps, and the evacuation of the filled receptacles 1 on an outlet conveyor 66.
- the containers 1 are held by the flange 19 of their cap, with precise angular positioning thanks to the ribs 19A and 19B as described above.
- the invention is not limited to the sole embodiments of this container made of flexible material which have been described above, by way of examples; on the contrary, it embraces all of the variant embodiments or applications respecting the same principle, and this also applies, naturally, for the manufacturing process and for the installation intended for the implementation of this process.
- the container can have lateral faces either of curved profile, or decomposed into facets, and that this container can have a rather cylindrical or frustoconical appearance depending on its size.
- the invention also includes, as such, an element for producing this container made of flexible material, this relatively rigid element comprising a plug 5 with its base 6 of square or rectangular shape, as well as a lug or handle gripping 15 made in one piece with the base 6 and projecting above the latter, as illustrated in Figures 7 and 8, the shape of the lug or grip handle can however give rise to many variants.
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Abstract
Description
La présente invention concerne un récipient en matière souple, réalisable notamment à partir de feuilles ou films en matière synthétique, simples ou complexes, qui est apte à recevoir un produit liquide, visqueux ou pulvérulent devant être versé pour son utilisation. Cette invention se rapporte aussi à un procédé de fabrication du récipient en cause, et à une installation destinée à la mise en oeuvre du procédé de fabrication dudit récipient.The present invention relates to a container made of flexible material, which can be produced in particular from sheets or films of synthetic material, simple or complex, which is capable of receiving a liquid, viscous or pulverulent product to be poured for its use. This invention also relates to a method of manufacturing the container in question, and to an installation intended for implementing the method of manufacturing said container.
On connaît, par le brevet français FR-A-1349272, un récipient en matière plastique en feuille, confectionné par soudure et découpage, qui présente deux faces latérales opposées et un fond reliant les deux faces, le fond étant replié pour réaliser avec les deux faces une configuration en "W" (vu en coupe verticale). Deux soudures latérales s'étendent sur toute la hauteur des deux faces, y compris la région du fond du récipient, pour assembler ces faces entre elles. Des soudures en ligne brisée ou curvilignes, dont les points de départ sont situés sur les soudures latérales à proximité du repli médian du "W", assemblent chaque face avec la zone du fond située en vis-à-vis. A leur extrémité supérieure, les deux faces latérales se resserrent et sont réunies l'une à l'autre selon une ligne, ce qui donne à l'ensemble du récipient à l'état rempli une allure générale conique.We know, from French patent FR-A-1349272, a plastic sheet container, made by welding and cutting, which has two opposite lateral faces and a bottom connecting the two faces, the bottom being folded to make with the two faces a "W" configuration (seen in vertical section). Two lateral welds extend over the entire height of the two faces, including the region of the bottom of the container, to assemble these faces together. Broken line or curvilinear welds, the starting points of which are located on the lateral welds close to the median fold of the "W", assemble each face with the bottom zone located opposite. At their upper end, the two lateral faces tighten and are joined to one another along a line, which gives the entire container in the filled state a general conical appearance.
Grâce à la constitution de sa partie inférieure, un tel récipient tient parfaitement debout. La forme prise par son fond lorsqu'il est rempli assure aussi une bonne répartition de la poussée exercée par le liquide qu'il contient. Lorsqu'il est vide, ce récipient peut être mis à plat, son fond de section en "W" formant soufflet.Thanks to the constitution of its lower part, such a container holds perfectly upright. The shape taken by its bottom when filled also ensures good distribution of the thrust exerted by the liquid it contains. When empty, this container can be placed flat, its bottom section in "W" forming bellows.
Malgré leurs avantages, dont les principaux ont été rappelés ci-dessus, ces récipients sont limités dans leurs utilisations. En particulier, compte tenu de leur forme générale conique avec rétrécissement de leur partie supérieure, de tels récipients possèdent une capacité relativement limitée par rapport à leur encombrement, et ne conviennent guère pour des volumes importants, notamment des volumes supérieurs à un litre. L'adaptation de ces récipients à des volumes importants nécessiterait une augmentation exagérée de leur hauteur, avec pour conséquences néfastes un manque de rigidité et une diminution de leur stabilité en position debout.Despite their advantages, the main ones of which have been mentioned above, these containers are limited in their uses. In particular, given their general conical shape with narrowing of their part upper, such containers have a relatively limited capacity compared to their size, and are hardly suitable for large volumes, especially volumes greater than one liter. Adapting these containers to large volumes would require an exaggerated increase in their height, with the harmful consequences of a lack of rigidity and a reduction in their stability in the standing position.
Par ailleurs, les récipients actuels du genre considéré sont généralement dépourvus de moyens qui facilitent le versage de leur contenu, et on les utilise habituellement en sectionnant l'un des angles de leur partie supérieure. Il en résulte aussi que de tels récipients ne peuvent être rebouchés pour une bonne conservation de leur contenu non utilisé à la première ouverture et pour une réutilisation ultérieure de ce contenu.Furthermore, current receptacles of the kind under consideration are generally devoid of means which facilitate the pouring of their contents, and they are usually used by cutting off one of the corners of their upper part. It also results therefrom that such containers cannot be capped for good preservation of their unused content at the first opening and for subsequent reuse of this content.
Pour éviter ces inconvénients, il a déjà été proposé un récipient de ce genre présentant une allure générale sensiblement cylindrique ou tronconique, et possédant une partie supérieure sur laquelle est fixé un bouchon (voir le modèle d'utilité allemand DE-U-8908015). Dans ce récipient, toutefois, la partie supérieure est réalisée dans une feuille souple distincte de celle constituant les faces latérales, d'où une nécessité d'assemblage par soudure entre les faces latérales du récipient et sa face supérieure. De plus, cette face supérieure supportant le bouchon est elle-même peu rigide, ce qui rend incommode l'utilisation du récipient.To avoid these drawbacks, a container of this kind has already been proposed having a generally cylindrical or frustoconical appearance, and having an upper part on which a plug is fixed (see the German utility model DE-U-8908015). In this container, however, the upper part is made of a flexible sheet separate from that constituting the side faces, hence a need for assembly by welding between the side faces of the container and its upper face. In addition, this upper face supporting the cap is itself not very rigid, which makes the use of the container inconvenient.
La présente invention vise à éliminer aussi ces derniers inconvénients.The present invention also aims to eliminate these latter drawbacks.
A cet effet, dans le récipient en matière souple objet de l'invention, appartenant au genre précisé en dernier lieu, la partie supérieure est réalisée dans la même matière que les faces latérales, cette partie supérieure comportant une zone centrale située au sommet du récipient, sur laquelle est fixé le bouchon et, de part et d'autre de la zone centrale, deux zones sensiblement triangulaires qui s'enfoncent entre les deux faces latérales, de manière à définir des "creux", et qui se raccordent par un sommet en des points des soudures latérales situés à distance au-dessous du sommet du récipient, tandis que le bouchon possède une embase de forme carrée ou rectangulaire, située dans la zone centrale de la partie supérieure du récipient et occupant sensiblement toute l'étendue de cette zone centrale.To this end, in the receptacle made of flexible material which is the subject of the invention, belonging to the genre specified last, the upper part is made of the same material as the side faces, this upper part comprising a central zone situated at the top. of the container, on which the cap is fixed and, on either side of the central zone, two substantially triangular zones which sink between the two lateral faces, so as to define "hollows", and which are connected by a top at points of the lateral welds located at a distance below the top of the container, while the stopper has a square or rectangular base, located in the central zone of the upper part of the container and occupying substantially the entire extent of this central area.
On comprend que la forme généralement cylindrique ou tronconique de ce récipient conduit à une augmentation sensible de son volume, l'invention permettant d'envisager des capacités allant jusqu'à 2 litres ou plus. Le bouchon situé dans la partie supérieure permet naturellement le versage et le rebouchage du récipient, qui dans l'ensemble réalise l'équivalent d'un flacon, d'une bouteille ou d'un petit bidon, tenant debout même partiellement vidé, tout en présentant des avantages supplémentaires résultant de sa souplesse : absence de rentrée d'air lors du versage du contenu d'où un jet de liquide parfait, et possibilité de mise à plat après utilisation, de sorte que le récipient forme un déchet de volume minimum. La présence du bouchon avec son embase est aussi avantageuse, en ce sens qu'elle renforce et rigidifie la partie supérieure du récipient et qu'elle offre un point de prise pour le guidage et la manipulation du récipient au cours de son processus de fabrication. En particulier, grâce à la forme de son embase, le bouchon peut être facilement dévissé et revissé, sans torsion du récipient. Le bouchon possède encore avantageusement, au-dessus de l'embase, une collerette définissant des rainures latérales qui sont utilisables pour le guidage et la tenue du bouchon et/ou de l'ensemble du récipient au cours de son processus de fabrication qui sera défini ci-après.It is understood that the generally cylindrical or frustoconical shape of this container leads to a significant increase in its volume, the invention making it possible to envisage capacities of up to 2 liters or more. The stopper located in the upper part naturally allows the pouring and the filling of the container, which on the whole achieves the equivalent of a bottle, a bottle or a small can, standing upright even partially emptied, while presenting additional advantages resulting from its flexibility: absence of re-entry of air during the pouring of the content, hence a perfect liquid jet, and possibility of flattening after use, so that the container forms a waste of minimum volume. The presence of the stopper with its base is also advantageous, in that it strengthens and stiffens the upper part of the container and that it provides a point of grip for guiding and handling the container during its manufacturing process. In particular, thanks to the shape of its base, the cap can be easily unscrewed and screwed back, without twisting the container. The stopper also advantageously has, above the base, a flange defining lateral grooves which can be used for guiding and holding the stopper and / or of the entire container during its manufacturing process which will be defined below.
Le bouchon peut être situé en position dissymétrique, à une distance plus faible du sommet d'une soudure latérale que du sommet de l'autre soudure latérale, les deux "creux" de la partie supérieure étant d'importance inégale, de manière à faciliter le versage.The plug can be located in an asymmetrical position, at a shorter distance from the top of a lateral weld than from the top of the other weld lateral, the two "hollows" of the upper part being of unequal importance, so as to facilitate pouring.
De plus, la position dissymétrique du bouchon permet l'adjonction d'une poignée en forme de patte de préhension, faisant saillie au-dessus de la face supérieure de l'embase dans la région ne comportant pas le bouchon, la patte étant réalisée d'une seule pièce avec l'embase, ce qui facilite encore l'utilisation du récipient.In addition, the asymmetrical position of the plug allows the addition of a handle in the form of a gripping tab, projecting above the upper face of the base in the region not comprising the plug, the tab being made of '' one piece with the base, which further facilitates the use of the container.
Le procédé selon l'invention, pour la fabrication du récipient en matière souple précédemment défini, consiste essentiellement :
- à dérouler à plat et tirer un premier film de matière thermosoudable, simple ou complexe ;
- à perforer le premier film suivant son axe longitudinal, à intervalles réguliers ;
- à amener et fixer par soudage sur ce premier film les embases des bouchons, en correspondance avec les perforations ;
- à déformer ce premier film en rabattant ses parties latérales vers le bas, tandis que la partie pourvue des bouchons reste en position haute ;
- à dérouler et tirer un second film de matière thermosoudable, simple ou complexe, en l'amenant entre les parties latérales "tombantes" du premier film ;
- à souder entre eux les deux films, pour former les soudures en ligne brisée ou curvilignes des fonds des récipients ;
- à réaliser les soudures latérales des récipients et leur séparation entre ces soudures ;
- à conformer les parties supérieures de ces récipients de manière à obtenir les "creux" précités.
- unrolling flat and drawing a first film of heat-sealable material, simple or complex;
- perforating the first film along its longitudinal axis, at regular intervals;
- in bringing and fixing by welding to this first film the bases of the plugs, in correspondence with the perforations;
- deforming this first film by folding its lateral parts down, while the part provided with the plugs remains in the high position;
- unwinding and pulling a second film of heat-sealable material, simple or complex, by bringing it between the "drooping" lateral parts of the first film;
- welding the two films together, to form the broken line or curvilinear welds of the bottom of the containers;
- to perform the lateral welds of the containers and their separation between these welds;
- to conform the upper parts of these containers so as to obtain the aforementioned "hollows".
Avantageusement, on prévoit une opération préliminaire de marquage, sur le premier film, des plis de la partie supérieure des récipients, de manière à faciliter la formation desdits "creux".Advantageously, provision is made for a preliminary marking operation, on the first film, of the folds of the upper part of the containers, so as to facilitate the formation of said "hollows".
La fabrication des récipients est ainsi assurée en continu, à partir de deux films thermosoudables dont l'un correspond à la partie supérieure et aux faces latérales, et dont l'autre correspond aux fonds des récipients, avec fixation des bouchons au cours du processus de fabrication, la soudure des bouchons sur le premier film encore à plat garantissant une fixation facile de ces bouchons. De plus, la mise en place des bouchons à un poste situé vers l'amont de la ligne de fabrication permet de mettre ensuite à profit ces bouchons pour guider le premier film, pour le tirer vers l'aval de manière précise et pour manipuler ensuite les récipients individuels résultant de la découpe effectuée entre les soudures latérales.The manufacturing of the containers is thus ensured continuously, from two heat-sealable films, one of which corresponds to the upper part and to the lateral faces, and the other of which corresponds to the bottoms of the containers, with fixing of the caps during the process of manufacturing, welding of the plugs on the first film still flat guaranteeing easy fixing of these plugs. In addition, the installation of the plugs at a position located upstream of the manufacturing line makes it possible to then use these plugs to guide the first film, to pull it downstream precisely and to then handle the individual containers resulting from the cut made between the side welds.
Selon un mode de mise en oeuvre préféré du procédé, le premier film est déformé de manière à être amené dans une configuration pliée en "T", les bouchons étant positionnés en position supérieure, et la réalisation des soudures, y compris des soudures fixant les plis de la partie supérieure des récipients, est réalisée dans cette configuration en "T", la séparation des récipients permettant ensuite leur allongement avec formation des "creux" précités.According to a preferred embodiment of the method, the first film is deformed so as to be brought into a folded "T" configuration, the plugs being positioned in the upper position, and the production of the welds, including the welds fixing the folds of the upper part of the containers, is produced in this "T" configuration, the separation of the containers then allowing their elongation with the formation of the aforementioned "hollows".
De préférence, on réalise de façon simultanée les soudures en ligne brisée ou curvilignes des fonds et les soudures fixant les plis de la partie supérieure, puis dans une étape ultérieure les soudures latérales des récipients.Preferably, simultaneous line or curvilinear welds of the bottoms and the welds fixing the folds of the upper part are carried out simultaneously, then in a later step the lateral welds of the containers.
Avantageusement, l'allongement des récipients après leur séparation est obtenu par gonflage de ces récipients au travers de leur bouchon. Cette opération de gonflage confère aux récipients leur configuration définitive, en provoquant leur allongement avec dépliage des plis de la partie supérieure et formation des "creux".Advantageously, the elongation of the containers after their separation is obtained by inflating these containers through their stopper. This inflation operation gives the containers their final configuration, causing them to lengthen with unfolding of the folds of the upper part and formation of "hollows".
Ce mode opératoire permet de former les "creux" de la partie supérieure des récipients, sans raccourcissement gênant de cette partie supérieure. La réalisation de soudures sur la partie supérieure des récipients, ayant une configuration provisoire en "T" (vu de profil), permet de réaliser simultanément les soudures des fonds, puisqu'il n'y a pas de raccourcissement. La fabrication des récipients concernés est ainsi rendue simple et rapide.This procedure makes it possible to form the "hollows" of the upper part of the containers, without shortening annoying of this upper part. The welding of the upper part of the containers, having a provisional configuration in "T" (seen in profile), allows to simultaneously carry out the welding of the bottoms, since there is no shortening. The manufacture of the containers concerned is thus made simple and rapid.
Pour la mise en oeuvre du procédé de fabrication qui vient d'être défini, l'invention propose une installation qui comprend, en combinaison :
- des moyens de dévidage d'une première bobine de film thermosoudable et de tirage à plat du premier film issu de cette bobine ;
- des moyens de poinçonnage assurant la perforation de ce premier film suivant son axe longitudinal ;
- des moyens d'amenée et de soudage des embases des bouchons sur le premier film, en correspondance avec les perforations ;
- un conformateur pour ce premier film, pourvu d'un guide central pour les bouchons, maintenant ces derniers en position haute tandis que les parties latérales du film sont rabattues vers le bas ;
- des moyens de dévidage d'une seconde bobine de film thermosoudable et d'amenée du second film, issu de cette bobine, entre les parties latérales "tombantes" du premier film ;
- des moyens de soudage des deux films entre eux, réalisant les soudures en ligne brisée ou curvilignes des fonds des récipients, ainsi que les soudures latérales ;
- un dispositif de tirage des deux films réunis et de découpe séparant les récipients.
- means for unwinding a first reel of heat-sealable film and flat drawing the first film from this reel;
- punching means ensuring the perforation of this first film along its longitudinal axis;
- means for feeding and welding the plug bases on the first film, in correspondence with the perforations;
- a former for this first film, provided with a central guide for the caps, keeping the latter in the high position while the lateral parts of the film are folded down;
- means for unwinding a second reel of heat-sealable film and supplying the second film, coming from this reel, between the "falling" side portions of the first film;
- means for welding the two films together, carrying out the broken line or curvilinear welds of the bottoms of the containers, as well as the lateral welds;
- a device for drawing the two films together and for cutting apart the containers.
Plus particulièrement, le conformateur comprend un guide plat horizontal soutenant la partie supérieure du premier film pourvue des bouchons, et deux barres de guidage latérales convergentes, de manière à amener progressivement le premier film dans une configuration en "T", un dispositif à mâchoires chauffantes étant prévu en aval de ce conformateur, pour la fixation par soudure des plis de la partie supérieure des récipients.More particularly, the former includes a horizontal flat guide supporting the upper part of the first film provided with the plugs, and two converging lateral guide bars, so as to bring progressively the first film in a "T" configuration, a device with heating jaws being provided downstream of this shaper, for fixing the folds of the upper part of the containers by welding.
Dans une forme de réalisation préférée de cette installation, le dispositif à mâchoires chauffantes, pour la fixation par soudure des plis de la partie supérieure des récipients, est associé, en un même poste de soudure, à une double station de soudure des fonds des récipients ; ce poste de soudure est suivi d'un poste réalisant les soudures latérales des mêmes récipients. Les postes suivants assurent le tirage de la bande formée par les deux films réunis, puis la séparation des récipients par découpe suivant leurs soudures latérales.In a preferred embodiment of this installation, the heating jaw device, for fixing the folds of the upper part of the containers by welding, is associated, in the same welding station, with a double station for welding the bottoms of the containers. ; this welding station is followed by a station carrying out the lateral welds of the same containers. The following stations ensure the pulling of the strip formed by the two films combined, then the separation of the containers by cutting according to their lateral welds.
Avantageusement, l'installation selon l'invention comprend encore, au-delà du poste de découpe assurant la séparation des récipients, un dispositif de préhension, d'entraînement et de gonflage des récipients séparés, où ces récipients sont pris et entraînés par leurs bouchons, et gonflés au travers de leurs bouchons pour recevoir leur configuration définitive.Advantageously, the installation according to the invention also comprises, beyond the cutting station ensuring the separation of the containers, a device for gripping, driving and inflating the separate containers, where these containers are taken and driven by their caps. , and inflated through their caps to receive their final configuration.
L'installation peut encore comporter, en aval du dispositif précédemment détaillé, des moyens de reprise individuelle des récipients, de remplissage de ces récipients et de vissage des bouchons ; ces derniers moyens peuvent être réalisés sous la forme d'une tourelle, et permettent de disposer d'une chaîne de fabrication complète, fournissant à sa sortie des récipients remplis et bouchés, prêts à être expédiés.The installation may also include, downstream of the previously detailed device, means for individually taking up the containers, filling these containers and screwing the caps; these latter means can be produced in the form of a turret, and make it possible to have a complete production line, supplying at its outlet filled and closed containers, ready to be dispatched.
De toute façon, l'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, des formes d'exécution de ce récipient en matière souple, et illustrant le procédé et l'installation de fabrication d'un tel récipient :
- Figure 1 est une vue d'ensemble, en perspective, d'un récipient en matière souple conforme à la présente invention ;
- Figure 2 est une vue en coupe verticale de ce récipient, passant par sa zone la plus large, selon II-II de figure 1 ;
- Figure 3 est une vue en coupe verticale du même récipient, passant par l'une de ses zones les plus étroites, selon III-III de figure 1 ;
- Figure 4 en est une autre vue en coupe verticale, passant par une zone de largeur intermédiaire, suivant IV-IV de figure 1 ;
- Figure 5 est une vue de face d'une variante de ce récipient ;
- Figure 6 est une vue d'ensemble, en perspective, d'un autre récipient en matière souple conforme à la présente invention ;
- Figure 7 est une vue en coupe verticale du bouchon de ce récipient, avec son embase ;
- Figure 8 est une vue en plan par dessus du bouchon de figure 7 avec son embase ;
- Figures 9 et 10 sont des vues partielles, illustrant des variantes de ce récipient ;
- Figure 11 est une vue d'ensemble, en plan par dessus, d'une installation pour la fabrication d'un récipient selon l'invention, l'installation étant représentée en deux tronçons séparés ;
- Figure 12 est une vue d'ensemble, de côté, de l'installation de figure 11, également représentée ici en deux tronçons séparés ;
- Figures 13, 14 et 15 sont des vues en coupe transversale, dans plusieurs plans successifs, du conformateur amenant le premier film dans une configuration en "T" ;
- Figure 16 est une vue en plan illustrant les soudures réalisées dans les parties supérieures des récipients ;
- Figure 17 est une vue en coupe horizontale, représentant certains détails du poste réalisant les soudures verticales ;
- Figures 18
et 19 sont des vues, respectivement de face et de côté, d'un récipient fini, avant gonflage ; - Figures 20
et 21 sont des vues, respectivement de face et de côté, du même récipient fini après gonflage.
- Figure 1 is an overall perspective view of a flexible material container according to the present invention;
- Figure 2 is a vertical sectional view of this container, passing through its widest area, according to II-II of Figure 1;
- Figure 3 is a vertical sectional view of the same container, passing through one of its narrowest zones, according to III-III of Figure 1;
- Figure 4 is another view in vertical section, passing through an area of intermediate width, along IV-IV of Figure 1;
- Figure 5 is a front view of a variant of this container;
- Figure 6 is an overall perspective view of another container of flexible material according to the present invention;
- Figure 7 is a vertical sectional view of the cap of this container, with its base;
- Figure 8 is a plan view from above of the cap of Figure 7 with its base;
- Figures 9 and 10 are partial views illustrating variants of this container;
- Figure 11 is an overall view, in plan from above, of an installation for manufacturing a container according to the invention, the installation being shown in two separate sections;
- Figure 12 is an overall side view of the installation of Figure 11, also shown here in two separate sections;
- Figures 13, 14 and 15 are cross-sectional views, in several successive planes, of the shaper bringing the first film in a "T"configuration;
- Figure 16 is a plan view illustrating the welds made in the upper parts of the containers;
- Figure 17 is a horizontal sectional view, showing certain details of the station performing the vertical welds;
- Figures 18 and 19 are views, respectively from the front and side, of a finished container, before inflation;
- Figures 20 and 21 are views, respectively from the front and from the side, of the same container finished after inflation.
Le récipient objet de l'invention, dont une première forme de réalisation est représentée aux figures 1 à 4, est désigné par la référence 1 et présente une allure générale cylindrique ou tronconique, et il est essentiellement constitué par deux faces latérales 2 opposées, par un fond 3 et par une partie supérieure 4 sur laquelle est mis en place un bouchon 5. Le récipient 1 est principalement réalisé en feuille ou film de matière synthétique souple thermosoudable, le bouchon 5 étant naturellement constitué d'une matière plus rigide.The container which is the subject of the invention, a first embodiment of which is shown in FIGS. 1 to 4, is designated by the
Plus particulièrement, les deux faces latérales 2 et la partie supérieure 4 du récipient résultent d'une même feuille de matière souple, pliée en "U" ou en "W" comme précisé plus bas, qui a au préalable reçu le bouchon 5 possédant une embase 6 carrée ou rectangulaire. Le fond 3 résulte d'une autre feuille souple, rapportée.More particularly, the two
Les deux faces latérales 2 sont réunies l'une à l'autre par des soudures latérales sensiblement verticales 7 et 8, qui s'étendent sur toute la hauteur du récipient. Entre les deux soudures 7 et 8, dans la zone centrale 9 où est fixé le bouchon 5, la partie supérieure 4 est sensiblement plane et la feuille de matière souple forme ici un "U" renversé, comme le montre la vue en coupe de la figure 2. Cette zone centrale 9 correspond à la partie la plus large du récipient 1.The two
De part et d'autre de la zone centrale 9 pourvue du bouchon 5, le récipient se rétrécit progressivement jusqu'à une épaisseur pratiquement nulle correspondant aux soudures verticales 7 et 8, la partie supérieure 4 formant en coupe un "W" renversé comme l'illustrent les figures 3 et 4. On distingue ainsi, de part et d'autre de la zone centrale 9, deux zones sensiblement triangulaires 10 et 11 qui s'étendent en s'abaissant entre les deux faces latérales 2, et qui se raccordent par un sommet respectivement 12,13 à des points des soudures verticales 7 et 8, situés à une certaine distance d au-dessous du sommet du récipient. Les zones triangulaires 10 et 11 sont ainsi fixées par les soudures 7 et 8.On either side of the
Comme le montre la figure 1, ces deux zones triangulaires 10 et 11, qui définissent des "creux" respectifs en forme de tétraèdres de part et d'autre de la zone centrale 9, sont avantageusement de longueurs inégales, cette dissymétrie rapprochant le bouchon 5 de l'une des soudures verticales 7 ou 8 et facilitant ainsi le versage du contenu du récipient.As shown in FIG. 1, these two
La partie inférieure du récipient présente elle aussi en coupe la forme d'un "W", des soudures 14 curvilignes ou en ligne brisée assurant la liaison étanche du fond rapporté 3 avec les deux faces latérales 2, ls points de départ des soudures 14 se situant sur les soudures verticales 7 et 8 à un certain niveau au-dessus de la base du récipient. Le principe d'un tel fond 3, formant un soufflet, est bien connu par exemple par le brevet français N° 1349272, et il ne sera pas décrit plus en détail.The lower part of the container also has, in section, the shape of a "W", curvilinear welds or in broken lines ensuring the sealed connection of the added base 3 with the two lateral faces 2, the starting points of the
Dans l'ensemble, on obtient ainsi un récipient 1 en matière souple de capacité importante, qui tient correctement debout même lorsqu'il est partiellement vidé, et qui peut être rebouché après usage. Grâce à la forme carrée ou rectangulaire de son embase 6, le bouchon 5 placé sur la partie supérieure 4 peut être facilement dévissé et revissé. La souplesse du récipient 1 fait que le jet de liquide est parfait car il n'y a pas de rentrée d'air, contrairement à un récipient rigide tel qu'une bouteille.On the whole, a
Comme l'illustre la figure 5, qui représente une variante de ce récipient 1, l'une des soudures verticales 8 peut comporter une partie supérieure élargie 15, par exemple de forme trapézoïdale, éventuellement percée d'une ouverture 16, qui forme une poignée facilitant la préhension du récipient pour l'ouverture/fermeture du bouchon 5 et pour le versage du liquide.As illustrated in FIG. 5, which represents a variant of this
Ce récipient peut aussi être mis à plat sous un encombrement négligeable, lorsqu'il est vide, soit pour sa livraison vers un lieu où s'effectuera ultérieurement son remplissage, soit après son utilisation.This container can also be laid flat in a negligible space, when it is empty, either for its delivery to a place where it will be filled later, or after its use.
Le récipient souple 1, décrit ci-dessus, est réalisable à partir de complexes du genre polyester-polyéthylène, ou polyester - aluminium - polyéthylène, ou polypropylène - polyéthylène, ou encore des complexes incluant du polyamide, comportant au moins une face en matériau thermofusible. On peut aussi utiliser des feuilles ou films en polyéthylène pur ou autre matière unique thermosoudable. Dans le cas de complexes dont une face est difficilement soudable, il convient de prévoir des découpes, telles que celles indiquées en 17 et 18 sur la figure 1, pour former des soudures verticales 7 et 8 réunissant efficacement les deux faces latérales 2 sur toute leur hauteur malgré l'insertion locale, entre ces faces 2, du fond 3 et des zones 10 et 11 de la partie supérieure 4.The
L'embase 6 du bouchon 5 est fixée également par soudure sur la zone centrale 9 de la partie supérieure 4. On notera que ce bouchon 5 comporte encore, au-dessus de l'embase 6, une collerette 19 permettant de définir des rainures latérales utiles dans le processus de fabrication du récipient.The
Les figures 6 à 8 représentent une autre forme de réalisation, dans laquelle les éléments correspondant à ceux précédemment décrits sont désignés par les mêmes repères. Le bouchon 5 est ici situé en position dissymétrique par rapport à l'embase 6, donc à une distance plus faible du sommet de la soudure latérale 7 que du sommet de l'autre soudure latérale 8, ce qui facilite le versage. En outre, l'utilisation du récipient est facilitée par la présence d'une poignée 15 en forme de patte de préhension de faible épaisseur, faisant saillie au-dessus de la face supérieure de l'embase 6 dans la région ne comportant pas le bouchon 5, la patte 15 étant réalisée d'une seule pièce avec l'embase 6.Figures 6 to 8 show another embodiment, in which the elements corresponding to those previously described are designated by the same references. The
Le bouchon 5 comporte toujours, à faible hauteur au-dessus de l'embase 6, une collerette 19 qui définit une rainure annulaire facilitant le guidage et la tenue de ce bouchon 5 et/ou de l'ensemble du récipient 1. Deux nervures 19A et 19B diamétralement opposées, ici prévues entre la collerette 19 et l'embase 6, permettent de bloquer en rotation le bouchon 5 et l'ensemble du récipient 1, lors du serrage entre deux mâchoires opposées appartenant à un dispositif de préhension automatique.The
Alors que les figures 6 à 8 montrent à titre d'exemple une poignée de préhension 15 ayant l'allure d'un "T", la figure 9 illustre une variante dans laquelle la poignée 15, toujours solidaire de l'embase 6, possède la configuration d'une anse fermée, ce qui se révèle plus avantageux, dans le cas d'un récipient 1 plus volumineux, donc plus lourd à l'état plein.While FIGS. 6 to 8 show by way of example a
La figure 10 illustre une autre variante, dans laquelle le bouchon à vis est remplacé par un embout tubulaire 5A initialement obturé par un opercule soudé 5B, ce qui conduit à une réalisation plus simple et plus économique dans le cas d'un récipient ne nécessitant pas d'être rebouché.FIG. 10 illustrates another variant, in which the screw cap is replaced by a
Pour le reste, et notamment la structure du corps du récipient, ces diverses variantes ne comportent pas de modification par rapport à la réalisation décrite en détail avec référence aux figures 1 à 4.For the rest, and in particular the structure of the container body, these various variants do not include any modification compared to the embodiment described in detail with reference to FIGS. 1 to 4.
L'installation de fabrication du récipient 1 précédemment décrit est représentée, dans son ensemble, sur les figures 11 et 12. Elle comprend un support pour une bobine 20 de film imprimé, d'axe horizontal 21, avec un dispositif d'entraînement à galet tangentiel 22. Un ensemble de rouleaux 23 assure, en aval de la bobine 20, une tension constante du film 24, nécessaire à son tirage alternatif. Un ensemble de cellules photoélectriques 25 et 26 permet de commander le déroulement de la bobine 20, à deux vitesses dont l'une est un peu plus forte que la vitesse moyenne désirée, et dont l'autre est un peu plus faible que cette vitesse moyenne.The installation for manufacturing the
En aval du dispositif de dévidage du film 24 est prévu un poste de travail automatique, comprenant successivement dans le sens de l'avance du film indiqué par une flèche 27 :
un dispositif 28 de marquage des plis de la partie supérieure du futur récipient 1, en vue de la formation correcte des zones triangulaires 10et 11 et des "creux" correspondants ;- un groupe de poinçonnage 29 servant à réaliser, dans l'axe du
film 24, des trous circulaires 30 destinés à recevoir les bouchons 5, ainsi que d'autres découpes, prévues pour faciliter la soudure et/ou pour le passage de la patte de préhension 15 ; un ensemble 31 d'amenée des embases 6 des bouchons 5, de pose et de soudage de ces embases 6 sous lefilm 24 en correspondance avec les trous 30, les embases 6 étant amenées latéralementpar une glissière 32, depuis un bol vibrant non représenté.
- a
device 28 for marking the folds of the upper part of thefuture container 1, with a view to the correct formation of the 10 and 11 and the corresponding "hollows";triangular zones - a
punching group 29 used to make, in the axis of thefilm 24,circular holes 30 intended to receive theplugs 5, as well as other cutouts, provided to facilitate welding and / or for the passage of thetab grip 15; - a
set 31 for supplying thebases 6 of theplugs 5, for fitting and welding thesebases 6 under thefilm 24 in correspondence with theholes 30, thebases 6 being brought laterally by aslide 32, from a vibrating bowl not shown .
Ensuite est prévu un dispositif 33 de tirage du film 24, décrivant un mouvement alternatif sous l'action de moyens de commande. Le dispositif de tirage 33 fonctionne avec un effet de correction de la position d'avance, grâce à une cellule photoélectrique, ce qui permet d'effectuer toutes les opérations précédentes à des emplacements très exacts en fonction de l'impression du film 24. En particulier, l'embase 6 est toujours soudée sur le film 24 à l'emplacement précis requis. Des mâchoires 34 de blocage du film 24 sont prévues dans la partie aval du dispositif 33.Next is provided a
A la sortie du dispositif de tirage 33, au-delà des mâchoires 34, il est prévu un rouleau 35 d'axe horizontal, en rotation permanente, qui évite au film 24 de faire une "vague" lorsque les vitesses de tirage sont rapides. En aval du rouleau 35, le film 24 forme un brin mou 36. Jusqu'ici, ce film 24 conserve une configuration plane, sans plis.At the exit from the
Au-delà du brin mou 36, le film 24 passe sur un conformateur d'allure générale triangulaire, se rétrécissant vers l'aval. Dans cette zone, le film 24 passe ainsi d'une configuration plane à une configuration pliée d'abord en "U" renversé puis resserrée en "T", les bouchons 5 étant positionnés en partie supérieure, et les parties latérales du film 24, correspondant aux faces latérales 2 des récipients, "tombant" vers le bas.Beyond the
Plus particulièrement, comme l'illustrent les figures 13, 14 et 15, le film 24 d'abord plié en "U" renversé passe progressivement à une conformation en "T", ses deux parties latérales "tombantes" étant rapprochées l'une de l'autre jusqu'à venir pratiquement l'une en contact avec l'autre. A cet effet, la partie supérieure du film 24 est soutenue par un guide plat horizontal 37, tandis que, de part et d'autre des parties latérales du film 24, sont prévues deux barres de guidage latérales convergentes 38.More particularly, as illustrated in FIGS. 13, 14 and 15, the
Sous ce conformateur est disposé un dérouleur 39 pour une autre bobine 40 de film, d'axe horizontal, qui fournit un autre film 41 destiné à la constitution des fonds 3 des récipients : Des rouleaux de guidage 42 amènent le film 41, issu de la bobine 40, vers un guide horizontal situé sous la partie supérieure du film 24. Entre la bobine 40 et ce guide est prévu un dispositif de poinçonnage 43 qui prépare le film 41 pour la soudure.Under this shaper is arranged an
Ce dernier film 41 est ainsi amené, plié en "V", entre les parties latérales resserrées du premier film 24, plié en "T". L'ensemble des deux films 24 et 41 parvient alors à un premier poste de soudure 44, où sont réalisées simultanément :
- d'une part, en deux stations situées en 45, la soudure des fonds 3 (soudures curvilignes ou en ligne brisée 14), réunissant entre eux les deux
films 24et 41, ces deux stations de soudage étant suivies d'un poste de refroidissement 46, et étant associées àun écran 47 évitant le collage ; - d'autre part, la soudure des plis supérieurs, comme illustré par la figure 16, cette soudure étant réalisée dans la partie supérieure du "T", au moyen d'un dispositif à mâchoires chauffantes 48 suivi d'un poste de refroidissement 49.
- on the one hand, in two stations located at 45, the welding of the bottoms 3 (curvilinear or broken line welds 14), bringing together the two
24 and 41, these two welding stations being followed by afilms cooling station 46, and being associated with ascreen 47 avoiding sticking; - on the other hand, the welding of the upper folds, as illustrated in FIG. 16, this welding being carried out in the upper part of the "T", by means of a
heating jaw device 48 followed by acooling station 49.
Le poste suivant 50 réalise des soudures verticales, devenant les soudures latérales 7 et 8 des récipients 1, au moyen de deux paires de mâchoires chauffantes 51 et 52, suivies d'une paire de blocs de refroidissement 53, des détails de ce poste 50 étant montrés sur la figure 17. Des blocs élastiques chauffants 54 et 55 sont insérés dans l'une des mâchoires 51 et 52 de chaque paire, en regard de l'autre mâchoire, pour compenser les différences d'épaisseurs résultant du nombre variable (deux ou quatre) des parties de films à souder entre elles.The
Le poste suivant 56 assure le tirage en avant de la bande, formée par les deux films 24 et 41 soudés l'un à l'autre, ce poste 56 comportant une paire de barrettes verticales 57, ainsi qu'un organe d'appui supérieur 58.The
Au-delà il est prévu un poste de coupe 59, assurant la séparation des récipients 1 suivant les soudures verticales 7 et 8, associé à un dispositif 60 de préhension, d'entraînement et de gonflage des récipients 1 séparés, où ces récipients sont pris et gonflés d'air ou d'un autre gaz par leurs bouchons 5.Beyond this, a cutting
Il est à noter que le gonflage des récipients 1 par leur bouchon 5 s'accompagne de leur allongement dans le sens de la longueur, la partie supérieure pliée du "T" se déployant alors, comme l'illustrent les figures 18 à 21 :
- les figures 18 et 19 montrent, vu de face et de côté, le récipient 1 encore à plat, en "T", sa longueur étant alors réduite ;
- les figures 20 et 21 montrent le même emballage 1 à l'état définitif, gonflé et étiré verticalement.
- Figures 18 and 19 show, seen from the front and side, the
container 1 still flat, "T", its length then being reduced; - Figures 20 and 21 show the
same package 1 in the final state, inflated and stretched vertically.
Il est à noter que les récipients 1, prélevés et gonflés par le dispositif 60, subissent encore une opération finale de soudage des pattes situées à leurs angles supérieurs, cette opération étant assurée par un dernier poste de soudage 61 suivi d'un poste de refroidissement 62.It should be noted that the
Les récipients 1, vides mais gonflés, sont finalement repris sur une tourelle 63, entraînée en rotation de façon discontinue autour d'un axe vertical 64, qui présente ces récipients 1 à des postes assurant successivement leur remplissage avec dosage précis, la pose en 65 des capsules de fermeture vissées, et l'évacuation des récipients 1 remplis sur un convoyeur de sortie 66.The
Sur la tourelle 63, les récipients 1 sont maintenus par la collerette 19 de leur bouchon, avec positionnement angulaire précis grâce aux nervures 19A et 19B comme décrit plus haut.On the
Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de ce récipient en matière souple qui ont été décrites ci-dessus, à titre d'exemples ; elle en embrasse, au contraire, toutes les variantes de réalisation ou d'application respectant le même principe, et ceci vaut aussi, naturellement, pour le procédé de fabrication et pour l'installation destinée à la mise en oeuvre de ce procédé. C'est ainsi, notamment, que le récipient peut présenter des faces latérales soit de profil courbe, soit décomposées en facettes, et que ce récipient peut présenter une allure plutôt cylindrique ou bien tronconique selon son dimensionnement. Enfin, l'invention englobe aussi, en tant que tel, un élément pour la réalisation de ce récipient en matière souple, cet élément relativement rigide comprenant un bouchon 5 avec son embase 6 de forme carrée ou rectangulaire, ainsi qu'une patte ou poignée de préhension 15 réalisée d'une seule pièce avec l'embase 6 et faisant saillie au-dessus de cette dernière, comme illustré aux figures 7 et 8, la forme de la patte ou poignée de préhension pouvant toutefois donner lieu à de nombreuses variantes.It goes without saying that the invention is not limited to the sole embodiments of this container made of flexible material which have been described above, by way of examples; on the contrary, it embraces all of the variant embodiments or applications respecting the same principle, and this also applies, naturally, for the manufacturing process and for the installation intended for the implementation of this process. Thus, in particular, that the container can have lateral faces either of curved profile, or decomposed into facets, and that this container can have a rather cylindrical or frustoconical appearance depending on its size. Finally, the invention also includes, as such, an element for producing this container made of flexible material, this relatively rigid element comprising a
Claims (19)
- A container of flexible material made mainly of sheets or films of plastic that are single-layer or multilayer, this container (1) having two side walls (2) and a base (3) interconnecting the two walls (2), the base (3) being folded to form with the two walls (2) a W-shape with two side weld seams (7,8) extending the entire height of the two walls (2) including the region of the base (3) of the container (1) to connect these two walls (2) to each other, while segmented or arcuate weld seams (14) which start at the side weld seams (7,8) near the central fold of the W-shape connect each wall (2) with the region of the base (3) confronting it, wherein the container (1) has a generally cylindrical or frustoconical shape and has an upper part (4) on which is fixed a spout (5,6), characterized in that the upper part (4) of the container (1) is formed of the same material as the two side walls (2), said upper part (4) having a central region (9) at the top of the container (1) on which is fixed the spout (5,6) and having to each side of the central region (9) two generally triangular gussets (10,11) which go down between the two side walls (2) so as to define hollows and which are attached at a point (12,13) to the side weld seams (7,8) at locations a distance (d) below the top of the container (1), while the spout (5) has a square or rectangular flange (6) at the central region (9) of the upper part (4) of the container (1) and occupies substantially the entire width and length of this central region (9).
- The container of flexible material according to claim 1, characterized in that the spout (5) has above the flange (6) a collar (19) defining two lateral grooves.
- The container of flexible material according to claim 2, characterized in that the spout (5) also has diametrically opposed ridges (19A,19B) between the collar (19) and the flange (6).
- The container of flexible material according to one of claims 1 to 3, characterized in that the spout (5) is located asymmetrically at a shorter distance from the top of one side seam (7) than from the top of the other side seam (8), the two hollows of the upper part (4) being of different size.
- The container of flexible material according to claim 1, characterized in that the spout (5) is located asymmetrically with respect to the flange (6) and that a tab or lifting handle (15) projects upward from the flange (6) in the region not having the spout (5).
- A part for making the container of flexible material according to claim 5, this relatively stiff part having a spout (5) with its rectangular or square flange (6) as well as a tab or lifting handle (15) formed unitarily with the flange (6) and projecting upward from the latter.
- A method of manufacture a container of flexible material according to one of claims 1 to 5, characterized in that it consists mainly of :
unrolling and pulling flat a first film (24) of single-layer or multilayer thermally weldable material ;
perforating (at 30) the first film (24) at regular intervals along its longitudinal axis ;
feeding in and fixing to said first film (24) the flanges (6) of the spouts (5) at the perforations (30) ;
deforming said first film (24) by folding down its sides while the part having the spouts (5) remains at the top ;
unrolling and pulling out a second film (41) of single-layer or multilayer thermally weldable material and feeding it in between the hanging side parts of the first film (24) ;
welding the two films (24,41) together to form segmented or arcuate weld seams (14) of the bases (3) of the containers (1) ;
forming side weld seams (7,8) of the containers and separating them between these weld seams ;
shaping the upper parts (4) of these containers (1) so as to obtain the above-cited hollows. - The method of manufacture according to claim 7, characterized in that there is a prior step of marking on the first film (24) the folds of the upper part (4) so as to facilitate the formation of said hollows.
- The method of manufacture according to claim 7 or 8, characterized in that the first film (24) is shaped so as to be folded into a T-shape, the spouts (5,6) being on top and that the weld seams, including the weld seams securing the folds of the upper part, are carried out in this T-shaped configuration, separation (at 59) of the containers (1) thus permitting them to extend while forming said hollows.
- The method of manufacture according to claim 9, characterized in that the segmented or arcuate weld seams (14) of the bases (3) and the weld seams fixing the folds of the upper part (4) are formed simultaneously, then the side weld seams (7,8) ot the containers are formed.
- The method of manufacture according to claim 9 or 10, characterized in that the extension of the containers (1) after their separation (at 59) is effected by inflating these containers via their spouts (5).
- The method of manufacture according to one of claims 7 to 11, characterized in that the spouts (5) installed on the first film (24) are used to guide this film (24) to move it downstream, and for handling the containers (1).
- An installation for carrying out the method of manufacture of containers of flexible material according to one of claims 7 to 12, characterized in that it comprises in combination : feed means (22,23,25,26,33) for pulling a first thermally weldable film (24) from a spool (20), flattening it, and displacing it along a longitudinal axis ;
punch means (29) for forming perforations (at 30) in this first film along its longitudinal axis ;
guide and welding means (31,32) for welding the flanges (6) of the spouts (5) on the first film (24) at the respective perforations ;
a shaper for said first film that holds the spouts (5,6) upward while the side parts of the film (24) are folded down ;
feed means (39,42) for feeding a second thermally weldable film (41) from a spool (40) to between the side parts of the first film (24) ;
welding means (44 to 55) for securing the two films (24,41) together at segmented or arcuate weld lines (14) of the bases of the containers as well as at side weld seams (7,8) ;
means (56) for pulling to two united films (24,41) and cutting means (59) for separating the containers (1). - The installation according to claim 13, characterized in that it further has downstream of the feed means for the first film (24) a device (28) for marking the folds of the upper part (4) of the containers (1).
- The installation according to claim 13 or 14, characterized in that the shaper comprises a flat horizontal guide (37) holding the upper part of the first film (24) fitted with spouts (5,6) and two side guide bars (38) that converge so as to progressively impart to the first film (24) a T-shape, a device with heated jaws (48) being provided downstream of this shaper for welding together the folds of the upper part (4) of the containers (1).
- The installation according to claim 15, characterized in that the device with the heated jaws (48) for welding together the folds of the upper part (4) of the containers (1) is associated at the same welding station (44) with a double welding station (45) for the bases (3) of the containers (1), this welding station (44) being followed by a station (50) where the side seams (7,8) of the same containers (1) are formed.
- The installation according to claim 16, characterized in that the station (50) for forming the side weld seams (7,8) has two pairs of vertically heated jaws (51,52) followed by a pair of cooling blocks (53), heated elastic blocks (54,55) being set into one of the jaws (51,52) of each pair in front of the other jaw.
- The installation according to one of claims 13 to 17, characterized in that it has, past the cutting station (59) for separating the containers (1) at the side weld seams (7,8), a device (60) for holding, transporting, and inflating the separated containers (1) where the containers are taken and handled by their spouts (5) and then inflated via their spouts (5) to get their definitive shape.
- The installation according to claim 18, characterized in that it further comprises, connected to the device (60) for tensioning, transporting, and inflating means (61,62) for welding tabs at the upper corners of the containers (1).
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9202627A FR2687985B1 (en) | 1992-02-28 | 1992-02-28 | CONTAINER OF FLEXIBLE MATERIAL, METHOD AND INSTALLATION FOR ITS MANUFACTURE. |
FR9202627 | 1992-02-28 | ||
FR9210423 | 1992-08-26 | ||
FR9210423A FR2695065B1 (en) | 1992-08-26 | 1992-08-26 | PROCESS AND PLANT FOR THE MANUFACTURE OF CONTAINERS IN FLEXIBLE MATERIAL. |
PCT/FR1993/000154 WO1993016928A1 (en) | 1992-02-28 | 1993-02-16 | Container made of flexible material, method and installation for its fabrication |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0626921A1 EP0626921A1 (en) | 1994-12-07 |
EP0626921B1 true EP0626921B1 (en) | 1995-07-19 |
Family
ID=26229306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93905396A Expired - Lifetime EP0626921B1 (en) | 1992-02-28 | 1993-02-16 | Container made of flexible material, method and installation for its fabrication |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0626921B1 (en) |
AT (1) | ATE125224T1 (en) |
AU (1) | AU3635493A (en) |
DE (1) | DE69300281T2 (en) |
MX (1) | MX9301039A (en) |
TW (1) | TW252083B (en) |
WO (1) | WO1993016928A1 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19504045C2 (en) * | 1995-02-08 | 2003-03-20 | Rovema Gmbh | Pouch made of a weldable plastic film and process for making the pouch |
JP2002540025A (en) | 1999-03-29 | 2002-11-26 | アムコル フレキシブルズ ユーロップ アクティー ゼルスカブ | Upright bag |
US6550493B2 (en) | 2001-06-13 | 2003-04-22 | Baxter International Inc. | Vacuum demand valve |
US6554023B2 (en) | 2001-06-13 | 2003-04-29 | Baxter International Inc. | Vacuum demand flow valve |
US6863261B2 (en) | 2002-03-12 | 2005-03-08 | Baxter International Inc. | Valve stop |
USD499793S1 (en) | 2003-03-17 | 2004-12-14 | Baxter International Inc. | Valve |
DE502007001725D1 (en) | 2007-01-23 | 2009-11-26 | Hans Georg Hagleitner | Made of a flexible material web of weldable plastic container |
EP2119558B8 (en) * | 2007-02-07 | 2019-06-12 | Fuji Seal International, Inc. | Method for producing pouch container with spout |
EP2433879B1 (en) * | 2010-09-27 | 2013-07-31 | Mondi Halle GmbH | Stand bag for bulk goods and method for producing a stand bag |
US8992084B2 (en) * | 2011-11-11 | 2015-03-31 | Ampac Holdings Llc | Pouch with rigid handle and supports |
US11220373B2 (en) | 2011-11-11 | 2022-01-11 | Proampac Holdings Inc. | Bottle pouch with rigid handle |
JP6025338B2 (en) | 2012-02-08 | 2016-11-16 | 株式会社フジシールインターナショナル | Bag making machine |
JP6514102B2 (en) | 2012-05-07 | 2019-05-15 | ザ プロクター アンド ギャンブル カンパニー | Flexible container |
MX371013B (en) | 2013-08-01 | 2020-01-10 | Procter & Gamble | Flexible containers having improved seam and methods of making the same. |
JP6373617B2 (en) * | 2014-03-31 | 2018-08-15 | 株式会社フジシールインターナショナル | Manufacturing apparatus and manufacturing method of pouch container with spout |
JP6340256B2 (en) * | 2014-06-19 | 2018-06-06 | 花王株式会社 | Pouch container |
JP6392056B2 (en) * | 2014-09-26 | 2018-09-19 | 株式会社フジシールインターナショナル | Pouch container with spout and pouch container package with spout |
JP2015024864A (en) * | 2014-10-02 | 2015-02-05 | 花王株式会社 | Soft packaging container for refilling |
JP6901835B2 (en) * | 2015-08-31 | 2021-07-14 | 花王株式会社 | Container with spout and refilling method |
JP6925178B2 (en) * | 2017-06-22 | 2021-08-25 | 株式会社細川洋行 | Packaging bag with spout, its manufacturing method, and packaging bag with spout containing contents |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL126868C (en) * | 1962-11-14 | 1900-01-01 | ||
US3690524A (en) * | 1969-04-26 | 1972-09-12 | Thimonnier & Cie | Mouthpiece for a plastics material bag, packet, receptacle sachet or the like |
US4452378A (en) * | 1982-06-16 | 1984-06-05 | Trinity Associates | Gussetted bottom pouch |
US4837849A (en) * | 1988-03-21 | 1989-06-06 | The Dow Chemical Company | Stand-up plastic bag and method of making same |
DE8908015U1 (en) * | 1989-06-30 | 1989-08-10 | Hoechst Ag, 6230 Frankfurt | Stable bag |
DE4021801A1 (en) * | 1990-04-23 | 1991-10-24 | Windmoeller & Hoelscher | SACK OR BAG WITH FILLED CONDITION OF RECTANGULAR BOTTOM AND STICKED HANDLE |
-
1993
- 1993-02-16 DE DE69300281T patent/DE69300281T2/en not_active Expired - Fee Related
- 1993-02-16 WO PCT/FR1993/000154 patent/WO1993016928A1/en active IP Right Grant
- 1993-02-16 AT AT93905396T patent/ATE125224T1/en not_active IP Right Cessation
- 1993-02-16 AU AU36354/93A patent/AU3635493A/en not_active Abandoned
- 1993-02-16 EP EP93905396A patent/EP0626921B1/en not_active Expired - Lifetime
- 1993-02-23 TW TW082101270A patent/TW252083B/zh active
- 1993-02-25 MX MX9301039A patent/MX9301039A/en unknown
Also Published As
Publication number | Publication date |
---|---|
TW252083B (en) | 1995-07-21 |
EP0626921A1 (en) | 1994-12-07 |
DE69300281T2 (en) | 1996-01-25 |
WO1993016928A1 (en) | 1993-09-02 |
ATE125224T1 (en) | 1995-08-15 |
DE69300281D1 (en) | 1995-08-24 |
MX9301039A (en) | 1993-09-01 |
AU3635493A (en) | 1993-09-13 |
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