EP0295203A1 - Method for packaging a product, and device for carrying out the method - Google Patents

Method for packaging a product, and device for carrying out the method Download PDF

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Publication number
EP0295203A1
EP0295203A1 EP88810312A EP88810312A EP0295203A1 EP 0295203 A1 EP0295203 A1 EP 0295203A1 EP 88810312 A EP88810312 A EP 88810312A EP 88810312 A EP88810312 A EP 88810312A EP 0295203 A1 EP0295203 A1 EP 0295203A1
Authority
EP
European Patent Office
Prior art keywords
product
flap
folds
folding
lateral
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.)
Granted
Application number
EP88810312A
Other languages
German (de)
French (fr)
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EP0295203B1 (en
Inventor
René Delacretaz
Serge Schor
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.)
Sapal SA
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Sapal SA
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Publication date
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Publication of EP0295203A1 publication Critical patent/EP0295203A1/en
Application granted granted Critical
Publication of EP0295203B1 publication Critical patent/EP0295203B1/en
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
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/18—Applying or generating heat or pressure or combinations thereof by endless bands or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
    • B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
    • B65B11/38—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths
    • B65B11/40—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents
    • B65B11/42—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a combination of straight and curved paths to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/14—Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members

Definitions

  • the present invention relates to a method of packaging a product, in particular a food product such as for example a chocolate bar of substantially rectangular shape, in a sealed package, in which the product is brought on a linear conveyor and positioned a sheet of rectangular heat sealable packaging material in the path of this product.
  • a product in particular a food product such as for example a chocolate bar of substantially rectangular shape
  • a sealed package in which the product is brought on a linear conveyor and positioned a sheet of rectangular heat sealable packaging material in the path of this product.
  • a device for packaging a product in particular a food product, such as for example a chocolate bar of substantially rectangular shape, in a sealed package, for the implementation of the above method, this device comprising a linear conveyor for bringing the products to be packaged and a device for positioning a sheet of substantially rectangular heat-sealable packaging material on the path of this product.
  • the present invention proposes to overcome this drawback by providing a succession of manipulations for which the existence of this flap does not constitute discomfort.
  • the method according to the invention is characterized in that the product and the paper are simultaneously driven on the linear conveyor by folding the sheet around the product so as to form two flaps of unequal lengths respectively adjacent to the large faces of the product, in that the product thus coated is then introduced into a housing of a rotary turning device, in that the flaps are sealed one on the other along a longitudinal edge of said product, which has the effect of forming a flap disposed substantially in the extension of the large underside of the product, in that the lateral folds are formed, in that the partially wrapped product is extracted, after it has been turned over , the turning device having pivoted by 180 °, in that the side folds are sealed, in that the said flap and the side folds are folded over the underside of the product, this face being disposed above the produced as a result of said re turning, and in that this flap is sealed against said underside.
  • the side folds are first folded, then said flap over the side folds.
  • the flap is first folded, then said lateral folds over said flap and a banner printed around the product is placed, this banner consisting of a rectangular sheet wrapped around the product, so as to form a sleeve open at its ends and so as to superimpose two edges of this sheet.
  • the lateral folds are sealed by preheating the heat-sealable packaging material by means of two heating tapes arranged to advance parallel to the product placed on the linear conveyor, then pressure is exerted on the side plies of heat-sealable material preheated by means of cooled pressing members, said plies being maintained in a position substantially perpendicular to the large faces of the product by at least one support and guide element.
  • the packaging device is characterized in that it comprises means for simultaneously driving the product and the paper onto the linear conveyor by folding the sheet around the product so as to form two flaps of unequal lengths respectively adjacent to the large ones. sides of this product, a rotary turning device comprising at least one housing for receiving a product thus coated, means for sealing the flaps one on the other along a longitudinal edge of said product, which has the effect to form a flap disposed substantially in the extension of the large underside of this product, means for forming the side folds, means for extracting the partially packaged product, after its inversion, means for sealing the side folds, means for bring the product into abutment in at least one station arranged to fold said flap and the side folds, and to fix this flap on the lower face ure of the product, this face being disposed above the product as a result of said reversal.
  • said means for sealing the lateral folds comprise two heating tapes arranged on either side of the product, means for advancing these tapes parallel to the products arranged on the linear conveyor, and at least two pressing members cooled to exert pressure on the side folds of preheated heat-sealable packaging material, said side folds being held in a position substantially perpendicular to the large faces of the product by at least one support and guide element.
  • This support and guide element for the side folds is preferably constituted by a pallet mounted on a transport chain arranged to move this pallet parallel to the product and at the same speed, this pallet having dimensions and a shape such that it can engage between the side folds arranged substantially vertically and provide support for said side folds, when subjected to the pressure of the pressing members.
  • the station arranged for folding up said flap preferably comprises a lifting device for lifting the product, lateral folders for folding down said lateral folds and movable folding stops for folding up said flap.
  • the device according to the invention comprises a linear conveyor 10 constituted by a conveyor belt, a chain or any other means known per se for bringing products 11 which are, in the example shown, chocolate bars.
  • the chocolate bars are relatively delicate products which have a non-negligible thickness, and edges which are generally inclined because the product is molded and must be able to be extracted from the mold.
  • the packaging material must be folded and sealed around the product and, due to the thickness of the product, the folds must be formed precisely using folding members.
  • a device 12 makes it possible to distribute sheets 13 of substantially rectangular shape of a heat-sealable packaging material.
  • the clamps 18, 19, which are of identical construction but one of which 18 includes heating members (not shown), and the other of which 19 includes cooling members (not shown), have two jaws 60 and 61 respectively integral with two levers 62 and 63 articulated relative to each other at 64.
  • a folding box 20 mounted on a support 20 ′ forms the flap 21 in fact constituted by the part of the flap 15 beyond the flap 14 after the sealing of said flaps, at the same time as the lateral folds 9 adjacent to the short lateral sides of the product.
  • the folding box which is known per se and exists on all traditional machines for packaging chocolate bars, consists of two central reel 20a and two pairs of lateral folding ramps 20b which respectively have the function of initiating and then forming the side folds 9.
  • the partially wrapped product is then extracted from the rotary inversion device.
  • the product is now placed on its upper face, called a "mirror" in the case of a chocolate bar, which will allow the folds to be folded over and the flap 21 on its underside which is kept arranged above the product more during the turning maneuver.
  • the product passes through a device for sealing the lateral folds which is composed on the one hand of two lateral heating bands 22 driven in parallel and possibly at the same speed as the product placed on a linear conveyor. These two heating strips have the function of preheating the heat-sealable packaging material at the side pleats.
  • This sealing device also consists of two pressing members 23, for example rollers designed both to exert lateral pressure on the side plies and to cool the preheated heat-sealable packaging material. It further comprises supporting and guiding elements for the lateral folds constituted by pallets 24 mounted on a chain 25 arranged to drive the pallets parallel and at the same speed as the product.
  • These pallets have a shape and dimensions such that they can be positioned above the large upper face of the shelves, between the lateral folds held vertically, and serve as a support to oppose the pressure of the pressure rollers 23.
  • the lateral folds are necessarily held vertically during this sealing operation since the two superimposed sheets which form each of the two folds move relative to each other when they are brought from the horizontal position into the vertical position.
  • these folds must be sealed in an upright position and therefore require an internal support resistant to the pressure exerted by the pressure rollers. This procedure guarantees regular preheating and correct and reliable sealing.
  • the product is entrained towards a station, illustrated in more detail in FIG. 3, which allows both the side folds to be folded down and the flap 21 to be folded over the large face of the chocolate bar.
  • This flap is preferably glued with a line of glue or dots of glue, and / or by sealing against the external surface of the packaging material already covering the underside of the product in a suitable station equipped with a gluing device and / or sealing 50.
  • This station 50 comprises a fixed support 51 and an arm 52 articulated on this support and preferably carrying several sealing heads 53 which can be heated to an adequate temperature to ensure spot sealing of the packaging material.
  • the arm 52 can pivot in the two opposite directions illustrated by the double arrow C. This device ensures the sealing of the flap on the underside of the product 11.
  • the products are fed continuously to the rotary turning device 16.
  • This device advances intermittently and brings the products successively opposite the clamps 18 and 19, and into the folding box 20.
  • the products are again taken up continuously and brought to the station for folding down the side folds 9 and the flap 21, then to the station for sealing this flap. Products advance intermittently in these two stations.
  • This continuous-intermittent path is due to the fact that certain stations (clamps 18, 19, folding 20, folding down the flap 21 and the side folds 9, sealing) are fixed, and the products must remain there for a predetermined period of time.
  • the rotary turning device 18 consists of a wheel at the periphery of which is formed a series of cells 17 oriented radially.
  • Products 11 are pushed to the interior of a cell brought in front of the linear conveyor by means of a pusher 30 fixed to the end of an arm 31 associated with a drive mechanism (not shown) which has the function of moving this pusher according to a path 32 shown in broken lines.
  • the products partially packaged in the sheet of heat-sealable packaging material are rotated to the station comprising the clamp 18 corresponding to the first preheating phase 19, the role of which has been defined above. They are then brought to the station comprising the clamp 19 corresponding to the second cooling phase which makes it possible to seal the two flaps 14 and 15.
  • the folding box 20 is arranged to shape the side folds 9, which has the effect of raising the flap 21 which therefore consists of a central part and two raised ends forming lateral wings 33 formed on either side of the central part.
  • the product When the product has made a 180 ° rotation, it is supported by a finger 34 which pushes it out of the housing and drives it along a guide 35 to the last station described with reference to FIG. 3.
  • the finger 34 is integral with a drive chain 36 and constitutes with the guide 35 a linear conveyor arranged to bring the product to the last processing station.
  • FIG 3 illustrates the station designed to fold the side folds and the flap 21.
  • the finger 34 pushes the product in abutment against a stop 37 disposed at the end of a lifting device 38 arranged to lift the product.
  • a stop 39 is fixed on a pivoting support 40 to stop the flap 21 and the lateral wings 33 arranged on either side of the flat part of this flap in a predetermined position.
  • the support 40 also comprises two folding templates 41 arranged to form the folds at a perfectly determined location when a movable folding member 42 folds the flap 21 by moving from its position 42 shown in solid lines in its position 42 ′ shown in broken lines, while the lifting member 38 rises while carrying the product, and while movable lateral folders 44 advance to fold down the lateral folds 9.
  • the flap 21 then forms an acute angle with the shelf and is folded over it by the fixed edge of the movable member 42 while the tablet is moved by the finger 34.
  • a first folding phase in a first folding phase, the lateral folds 9 of packaging material are folded over the underside 43 of the product 11, and in a second phase, the flap 21 is folded and fixed on the folded side pleats.
  • This form of folding means that the side folds and the flap must be large enough for the packaged product to look like a finished product. Consequently, this operating mode results in a fairly large consumption of packaging material.
  • the flap 21 of packaging material is folded and fixed on the underside 43 of the product 11.
  • the side folds are folded and fixed 9 on the folded flap and, the product packaged by this method does not have an appearance of a finished product because the side folds remain visible, in a third phase we surround this packaged product with a banner 45 of paper printed.
  • This form of folding allows a flap of dimensions smaller than those necessary in the other case and results in a saving of packaging material.
  • the flap is fixed in a manner known per se by means of one or more lines or dots of adhesive deposited on one of the two surfaces of the packaging material in contact with one another on the face lower 43 of the product, or by sealing, by means of the device of the station 50 described above.
  • Fig. 6A illustrates the packaging process corresponding to the packaging of FIG. 4.
  • the products 11, which are chocolate bars, are brought in the direction of arrow A.
  • the sheets 13 of packaging material coming from a supply device 70 with two rollers 71 and 72 are brought to the trajectory of the tablets, then arranged around these tablets.
  • the folding box 20 (not shown) forms the side folds 9 and the flap 21.
  • the side heating strips 22 heat the heat-sealable material in the area of the side folds and the pressure rollers 23 seal these side folds.
  • Turning members known per se and not shown, turn the shelves 11 over before removing them.
  • Fig. 6B repeats the elements of FIG. 6A from the rotary turning device 16.
  • the packaging is carried out as above until the lateral folds 9 are put in place and that of the flap 21.
  • the packaging line comprises a supply station 80 with two rollers 81 and 82 of packaging material. It is usually a sheet of printed paper. This sheet 83, previously cut, is interposed on the path of the shelves, then is folded in a known manner to form a sheath around this product. The two longitudinal edges are superimposed and then glued to each other.

Abstract

The device essentially comprises a linear conveyor (10) for entraining products (11), a device (12) for interposing on the path of the products a sheet of heat-sealable packaging material (13), a return device (16) comprising cells (17) for taking charge of the products and delivering them in front of a sealing station and a station for forming lateral folds, and a linear conveyor for delivering the products in a sealing station (22) for the lateral folds and for folding of the flap over the lower face of the product. <IMAGE>

Description

La présente invention concerne un procédé de conditionnement d'un produit, notamment d'un produit alimentaire tel que par exemple une tablette de chocolat de forme sensiblement rectangulaire, dans un emballage scellé, dans lequel on amène le produit sur un transporteur linéaire et on positionne une feuille d'un matériau d'emballage thermoscellable rectangulaire sur la trajectoire de ce produit.The present invention relates to a method of packaging a product, in particular a food product such as for example a chocolate bar of substantially rectangular shape, in a sealed package, in which the product is brought on a linear conveyor and positioned a sheet of rectangular heat sealable packaging material in the path of this product.

Elle concerne également un dispositif de conditionnement d'un produit, notamment d'un produit alimentaire, tel que par exemple une tablette de chocolat de forme sensiblement rectangulaire, dans un emballage scellé, pour la mise en oeuvre du procédé ci-dessus, ce dispositif comportant un transporteur linéaire pour amener les produits à conditionner et un dispositif pour positionner une feuille d'un matériau d'emballage thermoscellable sensiblement rectangulaire sur la trajectoire de ce produit.It also relates to a device for packaging a product, in particular a food product, such as for example a chocolate bar of substantially rectangular shape, in a sealed package, for the implementation of the above method, this device comprising a linear conveyor for bringing the products to be packaged and a device for positioning a sheet of substantially rectangular heat-sealable packaging material on the path of this product.

Pour répondre aux normes d'hygiène et de sécurité en matière de présentation des produits alimentaires tels que par exemple les tablettes de chocolat, on a de plus en plus tendance à recourir à un emballage étanche réalisé au moyen d'un matériau d'emballage thermoscellable. Dans les lignes d'emballage automatique, le produit est amené par un transporteur linéaire et entraîne le matériau d'emballage disposé sur sa trajectoire. Après le scellage des volets de matériau d'emballage qui se forment lorsque la feuille est repliée autour du produit, on obtient un rabat de matériau d'emballage qui devra par la suite être replié sur la face inférieure du produit après la formation et le rabattement préalable des plis latéraux. Or, cette opération nécessite un retour­nement du produit, ce qui entraîne généralement des manipulations difficiles en raison de l'existence de ce rabat qui peut s'avérer gênant.To meet health and safety standards in the presentation of food products such as for example chocolate bars, there is an increasing tendency to use leaktight packaging produced using heat-sealable packaging material. . In the automatic packaging lines, the product is brought by a linear conveyor and drives the packaging material placed on its path. After sealing the flaps of packaging material which are formed when the sheet is folded around the product, a flap of packaging material is obtained which must then be folded over the underside of the product after forming and folding down. side folds. However, this operation requires a reversal of the product, which generally results in difficult handling due to the existence of this flap which can prove to be troublesome.

La présente invention se propose de pallier cet inconvénient en prévoyant une succession de manipulations pour lesquelles l'existence de ce rabat ne constitue pas une gêne.The present invention proposes to overcome this drawback by providing a succession of manipulations for which the existence of this flap does not constitute discomfort.

Dans ce but, le procédé selon l'invention est caractérisé en ce que l'on entraîne simultanément le produit et le papier sur le transporteur linéaire en repliant la feuille autour du produit de manière à former deux volets de longueurs inégales respectivement adjacents aux grandes faces du produit, en ce que l'on introduit ensuite ce produit ainsi revêtu dans un logement d'un dispositif de retournement rotatif, en ce que l'on scelle les volets l'un sur l'autre le long d'un bord longitudinal dudit produit, ce qui a pour effet de former un rabat disposé sensiblement dans le prolongement de la grande face inférieure du produit, en ce que l'on forme les plis latéraux, en ce que l'on extrait le produit partiellement emballé, après son retournement, le dispositif de retournement ayant pivoté de 180°, en ce que l'on scelle les plis latéraux, en ce que l'on replie ledit rabat et le plis latéraux sur la face inférieure du produit, cette face étant disposée au-dessus du produit par suite dudit retournement, et en ce que l'on scelle ce rabat contre ladite face inférieure.For this purpose, the method according to the invention is characterized in that the product and the paper are simultaneously driven on the linear conveyor by folding the sheet around the product so as to form two flaps of unequal lengths respectively adjacent to the large faces of the product, in that the product thus coated is then introduced into a housing of a rotary turning device, in that the flaps are sealed one on the other along a longitudinal edge of said product, which has the effect of forming a flap disposed substantially in the extension of the large underside of the product, in that the lateral folds are formed, in that the partially wrapped product is extracted, after it has been turned over , the turning device having pivoted by 180 °, in that the side folds are sealed, in that the said flap and the side folds are folded over the underside of the product, this face being disposed above the produced as a result of said re turning, and in that this flap is sealed against said underside.

Selon un premier mode de réalisation, l'on replie d'abord les plis latéraux puis ledit rabat par-dessus les plis latéraux.According to a first embodiment, the side folds are first folded, then said flap over the side folds.

Selon un deuxième mode de réalisation, l'on replie d'abord le rabat puis lesdits plis latéraux par-dessus ledit rabat et l'on dispose une banderolle imprimée autour du produit, cette banderolle étant constituée par une feuille rectangulaire enroulée autour du produit, de manière à former un manchon ouvert à ses extrémités et de manière à superposer deux bords de cette feuille.According to a second embodiment, the flap is first folded, then said lateral folds over said flap and a banner printed around the product is placed, this banner consisting of a rectangular sheet wrapped around the product, so as to form a sleeve open at its ends and so as to superimpose two edges of this sheet.

Selon un mode de réalisation particulièrement avantageux, l'on scelle les plis latéraux en préchauffant le matériau d'emballage thermoscellable au moyen de deux rubans de chauffage agencés pour avancer parallè­lement au produit disposé sur le transporteur linéaire, puis l'on exerce une pression sur les plis latéraux en matériau thermoscellable préchauffé au moyen d'organes presseurs refroidis, lesdits plis étant maintenus dans une position sensiblement perpendiculaire aux grandes faces du produit par au moins un élément d'appui et de guidage.According to a particularly advantageous embodiment, the lateral folds are sealed by preheating the heat-sealable packaging material by means of two heating tapes arranged to advance parallel to the product placed on the linear conveyor, then pressure is exerted on the side plies of heat-sealable material preheated by means of cooled pressing members, said plies being maintained in a position substantially perpendicular to the large faces of the product by at least one support and guide element.

Pour sceller les plis latéraux, on les maintient au moyen dudit élément d'appui et de guidage en déplaçant cet élément parallèlement et à la même vitesse que le produit, cet élément étant positionné entre les deux plis et au-dessus de la grande face supérieure du produit.To seal the side folds, they are held by means of said support and guide element by moving this element parallel and at the same speed as the product, this element being positioned between the two folds and above the large upper face. of the product.

Le dispositif de conditionnement selon l'invention est caractérisé en ce qu'il comprend des moyens pour entraîner simultanément le produit et le papier sur le transporteur linéaire en repliant la feuille autour du produit de manière à former deux volets de longueurs inégales respectivement adjacents aux grandes faces de ce produit, un dispositif de retournement rotatif comportant au moins un logement pour recevoir un produit ainsi revêtu, des moyens pour sceller les volets l'un sur l'autre le long d'un bord longitudinal dudit produit, ce qui a pour effet de former un rabat disposé sensiblement dans le prolongement de la grande face inférieure de ce produit, des moyens pour former les plis latéraux, des moyens pour extraire le produit partiellement emballé, après son retournement, des moyens pour sceller les plis latéraux, des moyens pour amener le produit en butée dans au moins une station agencée pour replier ledit rabat et les plis latéraux, et pour fixer ce rabat sur la face inférieure du produit, cette face étant disposée au-dessus du produit par suite dudit retournement.The packaging device according to the invention is characterized in that it comprises means for simultaneously driving the product and the paper onto the linear conveyor by folding the sheet around the product so as to form two flaps of unequal lengths respectively adjacent to the large ones. sides of this product, a rotary turning device comprising at least one housing for receiving a product thus coated, means for sealing the flaps one on the other along a longitudinal edge of said product, which has the effect to form a flap disposed substantially in the extension of the large underside of this product, means for forming the side folds, means for extracting the partially packaged product, after its inversion, means for sealing the side folds, means for bring the product into abutment in at least one station arranged to fold said flap and the side folds, and to fix this flap on the lower face ure of the product, this face being disposed above the product as a result of said reversal.

Selon un mode de réalisation préféré lesdits moyens pour sceller les plis latéraux comportent deux rubans de chauffage disposés de part et d'autre du produit, des moyens pour faire avancer ces rubanss parallèlement aux produits disposés sur le transporteur linéaire, et au moins deux organes presseurs refroidis pour exercer une pression sur les plis latéraux en matériau d'emballage thermoscellable préchauffé, lesdits plis latéraux étant maintenus daans une position sensiblement perpendiculaire aux grandes faces du produit par au moins un élément d'appui et de guidage.According to a preferred embodiment, said means for sealing the lateral folds comprise two heating tapes arranged on either side of the product, means for advancing these tapes parallel to the products arranged on the linear conveyor, and at least two pressing members cooled to exert pressure on the side folds of preheated heat-sealable packaging material, said side folds being held in a position substantially perpendicular to the large faces of the product by at least one support and guide element.

Cet élément d'appui et de guidage des plis latéraux est de préférence constitué par une palette montée sur une chaîne de transport agencée pour déplacer cette palette parallèlement au produit et à la même vitesse, cette palette ayant des dimensions et une forme telles qu'elle puisse s'engager entre les plis latéraux disposés sensiblement vertica­lement et offrir des appuis auxdits plis latéraux, lorsqu'ils sont soumis à la pression des organes presseurs.This support and guide element for the side folds is preferably constituted by a pallet mounted on a transport chain arranged to move this pallet parallel to the product and at the same speed, this pallet having dimensions and a shape such that it can engage between the side folds arranged substantially vertically and provide support for said side folds, when subjected to the pressure of the pressing members.

La station agencée pour replier ledit rabat comporte de préférence un dispositif élévateur pour soulever le produit, des plieurs latéraux pur rabattre lesdits plis latéraux et des butées de pliage mobiles pour replier ledit rabat.The station arranged for folding up said flap preferably comprises a lifting device for lifting the product, lateral folders for folding down said lateral folds and movable folding stops for folding up said flap.

La présente invention sera mieux comprise en référence à la description d'un exemple de réalisation et du dessin annexé dans lequel :

  • La fig. 1 représente une vue schématique du dispositif de condition­nement selon l'invention,
  • la fig. 2 représente une vue de détail du dispositif de retournement rotatif,
  • la fig. 3 représente une vue schématique de la station de pliage des plis latéraux et du rabat,
  • la fig. 4 représente une première forme du pliage du matériau d'emballage sur le produit,
  • la fig. 5 représente une deuxième forme de pliage du matériau sur le produit avec l'adjonction d'une banderolle, et
  • les fig. 6A et 6B représentent respectivement deux vues en perspective illustrant le mode de réalisation de l'emballage de la fig. 4 et le mode de réalisation de la fig. 5
The present invention will be better understood with reference to the description of an exemplary embodiment and the accompanying drawing in which:
  • Fig. 1 represents a schematic view of the packaging device according to the invention,
  • fig. 2 represents a detailed view of the rotary turning device,
  • fig. 3 represents a schematic view of the station for folding the side folds and the flap,
  • fig. 4 represents a first form of folding of the packaging material on the product,
  • fig. 5 represents a second form of folding of the material on the product with the addition of a banner, and
  • fig. 6A and 6B respectively represent two perspective views illustrating the embodiment of the packaging of FIG. 4 and the embodiment of FIG. 5

En référence à la fig. 1, le dispositif selon l'invention comporte un transporteur linéaire 10 constitué par un ruban transporteur, une chaîne ou tout autre moyen connu en soi pour amener des produits 11 qui sont, dans l'exemple représenté, des tablettes de chocolat. Il est à noter que les tablettes de chocolat sont des produits relativement délicats qui présentent une épaisseur non négligeable, et des bords généralement inclinés du fait que le produit est moulé et doit pouvoir être extrait du moule. Le matériau d'emballage doit être plié et scellé autour du produit et, du fait de l'épaisseur du produit, les plis doivent être formés de manière précise à l'aide d'organes de pliage. Un dispositif 12 permet de distribuer des feuilles 13 de forme sensiblement rectangulaire d'un matériau d'emballage thermoscellable. Ces feuilles sont entraînées par le produit lors de son déplacement dans le sens de la flèche A et sont pliées autour de la face frontale de ce produit de manière à former deux volets 14 et 15 de longueurs inégales. C'est de matte manière que le produit, partiellement emballé dans la feuille de matériau d'emballage thermoscellable 13, est acheminé vers un dispositif de retournement rotatif 16 comportant des alvéoles récepteurs 17 destinés à recevoir les produits et à les entraîner en rotation de 180° dans le sens de la flèche B, de manière à les retourner. Pendant ce déplacement, le volet 15 est scellé contre le volet 14 au moyen d'une première pince 18 destinée à préchauffer le matériau thermoscellable et au moyen d'une seconde pince 19 disposée en aval de la pince 18, et agencée pour exercer une pression sur les deux volets et pour refroidir le matériau thermoscellable préalablement chauffé.With reference to fig. 1, the device according to the invention comprises a linear conveyor 10 constituted by a conveyor belt, a chain or any other means known per se for bringing products 11 which are, in the example shown, chocolate bars. It should be noted that the chocolate bars are relatively delicate products which have a non-negligible thickness, and edges which are generally inclined because the product is molded and must be able to be extracted from the mold. The packaging material must be folded and sealed around the product and, due to the thickness of the product, the folds must be formed precisely using folding members. A device 12 makes it possible to distribute sheets 13 of substantially rectangular shape of a heat-sealable packaging material. These sheets are entrained by the product during its movement in the direction of arrow A and are folded around the front face of this product so as to form two flaps 14 and 15 of unequal lengths. It is in this way that the product, partially wrapped in the sheet of heat-sealable packaging material 13, is conveyed to a rotary turning device 16 comprising receiving cells 17 intended to receive the products and to rotate them 180 ° in the direction of arrow B, so as to turn them over. During this movement, the flap 15 is sealed against the flap 14 by means of a first clamp 18 intended to preheat the heat-sealable material and by means of a second clamp 19 arranged downstream of the clamp 18, and arranged to exert pressure on both flaps and to cool the heat-sealable material previously heated.

Les pinces 18, 19, qui sont de construction identique mais dont l'une 18 comporte des organes de chauffage (non représentés), et dont l'autre 19 comporte des organes de refroidissement (non représentés), comportent deux mâchoires 60 et 61 respectivement solidaires de deux leviers 62 et 63 articulés l'un par rapport à l'autre en 64.The clamps 18, 19, which are of identical construction but one of which 18 includes heating members (not shown), and the other of which 19 includes cooling members (not shown), have two jaws 60 and 61 respectively integral with two levers 62 and 63 articulated relative to each other at 64.

Des organes de commande mécaniques, pneumatiques ou hydrauliques permettent d'ouvrir les deux mâchoires 60 et 61 comme le montre plus particulièrement la fig. 2, pour les amener dans les positions 60′ et 61′ ilustrées en traits interrompus.Mechanical, pneumatic or hydraulic control members make it possible to open the two jaws 60 and 61 as shown more particularly in FIG. 2, to bring them into positions 60 ′ and 61 ′ illustrated in broken lines.

Une boîte de pliage 20 montée sur un support 20′ forme le rabat 21 constitué en fait par la partie du volet 15 dépassant le volet 14 après le scellage desdits volets, en même temps que les plis latéraux 9 adjacents aux petits côtés latéraux du produit. La boîte de pliage, qui est connue en soi et existe sur toutes les machines traditionnelles de condition­nement des tablettes de chocolat, se compose de deux rabatteurs centraux 20a et de deux paires de rampes de pliage latérales 20b qui ont respectivement pour fonction d'amorcer puis de former les plis latéraux 9. Le produit partiellement emballé est ensuite extrait du dispositif de renversement rotatif. Le produit est maintenant posé sur sa face supérieure, appelée "miroir" dans le cas d'une tablette de chocolat, ce qui permettra de replier les plis latéraux et le rabat 21 sur sa face inférieure qui est maintenue disposée au-dessus du produit suite à la manoeuvre de retournement. Avant cette dernière opération, le produit traverse un dispositif de scellage des plis latéraux qui se compose d'une part de deux bandes latérales chauffantes 22 entraînées parallèlement et éventuellement à la même vitesse que le produit placé sur un transporteur linéaire. Ces deux bandes chauffantes ont pour fonction de préchauffer le matériau d'emballage thermoscellable au niveau des plis latéraux . Ce dispositif de scellage se compose d'autre part de deux organes presseurs 23, par exemple des rouleaux conçus à la fois pour exercer une pression latérale sur les plis latéraux et pour refroidir le matériau d'emballage thermoscellable préchauffé. Il comporte en outre des éléments d'appui et de guidage des plis latéraux constitués par des palettes 24 montées sur une chaîne 25 agencée pour entraîner les palettes parallèlement et à la même vitesse que le produit. Ces palettes ont une forme et des dimensions telles qu'elles puissent être positionnées au-dessus de la grande face supérieure des tablettes, entre les plis latéraux maintenus verticalement, et servir d'appui pour s'opposer à la pression des rouleaux presseurs 23. On notera que les plis latéraux sont obligatoirement maintenus verticalement pendant cette opération de scellage étant donné que les deux feuilles superposées qui forment chacun des deux plis se déplacent l'une relativement à l'autre au moment où elles sont amenées de la position horizontale dans la position verticale. Pour éviter les faux plis et le froissement du matériau d'emballage au moment du rabattement des plis latéraux contre la face inférieure du produit, ces plis doivent être scellés en position verticale et nécessitent de ce fait un appui intérieur résistant à la pression exercée par les rouleaux presseurs. Cette manière de procéder garantit un préchauffage régulier et un scellage correct et fiable.A folding box 20 mounted on a support 20 ′ forms the flap 21 in fact constituted by the part of the flap 15 beyond the flap 14 after the sealing of said flaps, at the same time as the lateral folds 9 adjacent to the short lateral sides of the product. The folding box, which is known per se and exists on all traditional machines for packaging chocolate bars, consists of two central reel 20a and two pairs of lateral folding ramps 20b which respectively have the function of initiating and then forming the side folds 9. The partially wrapped product is then extracted from the rotary inversion device. The product is now placed on its upper face, called a "mirror" in the case of a chocolate bar, which will allow the folds to be folded over and the flap 21 on its underside which is kept arranged above the product more during the turning maneuver. Before this last operation, the product passes through a device for sealing the lateral folds which is composed on the one hand of two lateral heating bands 22 driven in parallel and possibly at the same speed as the product placed on a linear conveyor. These two heating strips have the function of preheating the heat-sealable packaging material at the side pleats. This sealing device also consists of two pressing members 23, for example rollers designed both to exert lateral pressure on the side plies and to cool the preheated heat-sealable packaging material. It further comprises supporting and guiding elements for the lateral folds constituted by pallets 24 mounted on a chain 25 arranged to drive the pallets parallel and at the same speed as the product. These pallets have a shape and dimensions such that they can be positioned above the large upper face of the shelves, between the lateral folds held vertically, and serve as a support to oppose the pressure of the pressure rollers 23. It will be noted that the lateral folds are necessarily held vertically during this sealing operation since the two superimposed sheets which form each of the two folds move relative to each other when they are brought from the horizontal position into the vertical position. To avoid creases and wrinkling of the packaging material when the side pleats are folded against the underside of the product, these folds must be sealed in an upright position and therefore require an internal support resistant to the pressure exerted by the pressure rollers. This procedure guarantees regular preheating and correct and reliable sealing.

A la sortie de ce poste de traitement, le produit est entraîné vers une station, illustrée plus en détail par la fig. 3, qui permet à la fois de rabattre les plis latéraux et de replier le rabat 21 sur la grande face de la tablette de chocolat. Ce rabat est de préférence collé par un trait de colle ou des points de colle, et/ou par scellage contre la surface extérieure du matériau d'emballage recouvrant déjà la face inférieure du produit dans une station appropriée équipée d'un dispositif de collage et/ou de scellage 50.At the exit of this treatment station, the product is entrained towards a station, illustrated in more detail in FIG. 3, which allows both the side folds to be folded down and the flap 21 to be folded over the large face of the chocolate bar. This flap is preferably glued with a line of glue or dots of glue, and / or by sealing against the external surface of the packaging material already covering the underside of the product in a suitable station equipped with a gluing device and / or sealing 50.

Cette station 50 comporte un support 51 fixe et un bras 52 articulé sur ce support et portant, de préférence, plusieurs têtes de scellage 53 qui peuvent être chauffées à une température adéquate pour assurer un scellage par points du matériau d'emballage. Le bras 52 peut pivoter dans les deux directions opposées illustrées par la double flèche C. Ce dispositif assure le scellage du rabat sur la face inférieure du produit 11.This station 50 comprises a fixed support 51 and an arm 52 articulated on this support and preferably carrying several sealing heads 53 which can be heated to an adequate temperature to ensure spot sealing of the packaging material. The arm 52 can pivot in the two opposite directions illustrated by the double arrow C. This device ensures the sealing of the flap on the underside of the product 11.

On notera que les produits sont amenés en continu jusqu'au dispositif de retournement rotatif 16. Ce dispositif avance par intermittence et amène les produits successivement en face des pinces 18 et 19, et dans la boîte de pliage 20. A la sortie du dispositif de retournement rotatif 16, les produits sont à nouveau repris en continu et amenés à la station de rabattement des plis latéraux 9 et du rabat 21, puis à la station de scellage de ce rabat. Les produits avancent par intermittence dans ces deux stations.It will be noted that the products are fed continuously to the rotary turning device 16. This device advances intermittently and brings the products successively opposite the clamps 18 and 19, and into the folding box 20. At the outlet of the rotary turning 16, the products are again taken up continuously and brought to the station for folding down the side folds 9 and the flap 21, then to the station for sealing this flap. Products advance intermittently in these two stations.

Ce cheminement continu-intermittent est dû au fait que certaines stations (pinces 18, 19, pliage 20, rabattement du rabat 21 et des plis latéraux 9, scellage) sont fixes, et que les produits doivent y séjourner pendant un intervalle de temps prédéterminé.This continuous-intermittent path is due to the fact that certain stations (clamps 18, 19, folding 20, folding down the flap 21 and the side folds 9, sealing) are fixed, and the products must remain there for a predetermined period of time.

En référence à la figure 2, le dispositif de retournement rotatif 18 se compose d'une roue à la périphérie de laquelle est ménagée une série d'alvéoles 17 orientés radialement. Les produits 11 sont poussés à l'intérieur d'un alvéole amené en face du transporteur linéaire au moyen d'un poussoir 30 fixé à l'extrémité d'un bras 31 associé à un mécanisme d'entraînement (non représenté) qui a pour fonction de déplacer ce poussoir selon une trajectoire 32 représentée en traits interrompus. Les produits partiellement emballés dans la feuille de matériau d'emballage thermoscellable sont entraînés en rotation jusqu'au poste comportant la pince 18 correspondant à la première phase de préchauffage 19 dont le rôle a été défini ci-dessus. Ils sont ensuite amenés au poste comportant la pince 19 correspondant à la deuxième phase de refroidissement qui permet d'effectuer de sceller les deux volets 14 et 15. La boîte de pliage 20 est agencée pour mettre en forme les plis latéraux 9, ce qui a pour effet de relever le rabat 21 qui se compose dès lors d'une partie centrale et de deux extrémités relevées formant des ailes latérales 33 ménagées de part et d'autre de la partie centrale.Referring to Figure 2, the rotary turning device 18 consists of a wheel at the periphery of which is formed a series of cells 17 oriented radially. Products 11 are pushed to the interior of a cell brought in front of the linear conveyor by means of a pusher 30 fixed to the end of an arm 31 associated with a drive mechanism (not shown) which has the function of moving this pusher according to a path 32 shown in broken lines. The products partially packaged in the sheet of heat-sealable packaging material are rotated to the station comprising the clamp 18 corresponding to the first preheating phase 19, the role of which has been defined above. They are then brought to the station comprising the clamp 19 corresponding to the second cooling phase which makes it possible to seal the two flaps 14 and 15. The folding box 20 is arranged to shape the side folds 9, which has the effect of raising the flap 21 which therefore consists of a central part and two raised ends forming lateral wings 33 formed on either side of the central part.

Lorsque le produit a effectué une rotation de 180°, il est pris en charge par un doigt 34 qui le repousse hors du logement et l'entraîne le long d'un guide 35 jusqu'au dernier poste décrit en référence à la figure 3. Le doigt 34 est solidaire d'une chaîne d'entraînement 36 et constitue avec le guide 35 un transporteur linéaire agencé pour amener le produit au dernier poste de traitement.When the product has made a 180 ° rotation, it is supported by a finger 34 which pushes it out of the housing and drives it along a guide 35 to the last station described with reference to FIG. 3. The finger 34 is integral with a drive chain 36 and constitutes with the guide 35 a linear conveyor arranged to bring the product to the last processing station.

La figure 3 illustre la station conçue pour replier les plis latéraux et le rabat 21. A cet effet, le doigt 34 repousse le produit en appui contre une butée 37 disposée à l'extrémité d'un dispositif élévateur 38 agencé pour soulever le produit. Une butée 39 est fixée sur un support pivotant 40 pour arrêter le rabat 21 et les ailes latérales 33 disposées de part et d'autre de la partie plane de ce rabat dans une position prédéterminée. Le support 40 comporte par ailleurs deux gabarits de pliage 41 agencés pour former les plis à un endroit parfaitement déterminé lorsqu'un organe mobile de pliage 42 replie le rabat 21 en se déplaçant de sa position 42 représentée en traits pleins dans sa position 42′ représentée en traits interrompus, pendant que que l'organe élévateur 38 s'élève en portant le produit, et que des plieurs latéraux mobiles 44 s'avancent pour rabattre les plis latéraux 9. Le rabat 21 forme alors un angle aigu avec la tablette et est rabatu sur elle par le bord fixe de l'organe mobile 42 pendant que la tablette est déplacée par le doigt 34.Figure 3 illustrates the station designed to fold the side folds and the flap 21. For this purpose, the finger 34 pushes the product in abutment against a stop 37 disposed at the end of a lifting device 38 arranged to lift the product. A stop 39 is fixed on a pivoting support 40 to stop the flap 21 and the lateral wings 33 arranged on either side of the flat part of this flap in a predetermined position. The support 40 also comprises two folding templates 41 arranged to form the folds at a perfectly determined location when a movable folding member 42 folds the flap 21 by moving from its position 42 shown in solid lines in its position 42 ′ shown in broken lines, while the lifting member 38 rises while carrying the product, and while movable lateral folders 44 advance to fold down the lateral folds 9. The flap 21 then forms an acute angle with the shelf and is folded over it by the fixed edge of the movable member 42 while the tablet is moved by the finger 34.

Selon la présentation du produit fini que l'on veut obtenir, l'on peut procéder au pliage du matériau d'emballage sur le produit de deux manières différentes.Depending on the presentation of the finished product that we want to obtain, there are two different ways of folding the packaging material on the product.

En référence à la fig. 4, dans une première phase de pliage, l'on replie les plis latéraux 9 de matériau d'emballage sur la face inférieure 43 du produit 11, et dans une deuxième phase l'on replie et l'on fixe le rabat 21 sur les plis latéraux repliés. Cette forme de pliage implique que les plis latéraux et le rabat doivent avoir des dimensions assez grandes pour que le produit emballé ait l'aspect d'un produit bien fini. En consé­quence, ce mode opératoire entraîne une assez grande consommation de matériau d'emballage.With reference to fig. 4, in a first folding phase, the lateral folds 9 of packaging material are folded over the underside 43 of the product 11, and in a second phase, the flap 21 is folded and fixed on the folded side pleats. This form of folding means that the side folds and the flap must be large enough for the packaged product to look like a finished product. Consequently, this operating mode results in a fairly large consumption of packaging material.

Dans la seconde méthode de pliage illustrée par la fig. 5, dans la première phase de pliage l'on replie et l'on fixe le rabat 21 de matériau d'emballage sur la face inférieure 43 du produit 11. Dans la deuxième phase l'on replie et l'on fixe les plis latéraux 9 sur le rabat replié et, le produit emballé par cette méthode n'ayant pas un aspect de produit bien fini du fait que les plis latéraux restent apparents, dans une troisième phase l'on entoure ce produit emballé d'une banderolle 45 de papier imprimé. Cette forme de pliage permet de un rabat de dimensions inférieures à celles nécessaires dans dans l'autre cas et entraîne une économie de matériau d'emballage.In the second folding method illustrated in fig. 5, in the first folding phase, the flap 21 of packaging material is folded and fixed on the underside 43 of the product 11. In the second phase, the side folds are folded and fixed 9 on the folded flap and, the product packaged by this method does not have an appearance of a finished product because the side folds remain visible, in a third phase we surround this packaged product with a banner 45 of paper printed. This form of folding allows a flap of dimensions smaller than those necessary in the other case and results in a saving of packaging material.

La fixation du rabat se fait d'une façon connue en soi au moyen d'un ou plusieurs traits ou points de colle déposés sur l'une des deux surfaces du matériau d'emballage en contact l'une avec l'autre sur la face inférieure 43 du produit, ou par scellage, au moyen du dispositif de la station 50 décrite précédemment.The flap is fixed in a manner known per se by means of one or more lines or dots of adhesive deposited on one of the two surfaces of the packaging material in contact with one another on the face lower 43 of the product, or by sealing, by means of the device of the station 50 described above.

La fig. 6A illustre le processus de conditionnement correspondant à l'emballage de la fig. 4. Les produits 11, qui sont des tablettes de chocolat, sont amenés dans le sens de la flèche A. Les feuilles 13 de matériau d'emballage provenant d'un dispositif d'alimentation 70 à deux rouleaux 71 et 72 sont amenées sur la trajectoire des tablettes, puis disposées autour de ces tablettes.Fig. 6A illustrates the packaging process corresponding to the packaging of FIG. 4. The products 11, which are chocolate bars, are brought in the direction of arrow A. The sheets 13 of packaging material coming from a supply device 70 with two rollers 71 and 72 are brought to the trajectory of the tablets, then arranged around these tablets.

Ces tablettes sont ensuite introduites dans le dispositif de retournement rotatif 16 qui tourne par intermittence dans le sens de la flèche B. Les pinces 18 et 19 (non représentées sur cette figure) assurent le scellage des deux surfaces de matériau d'emballage pour former un emballage tubulaire 73 autour de la tablette.These tablets are then introduced into the rotary turning device 16 which rotates intermittently in the direction of the arrow B. The clamps 18 and 19 (not shown in this figure) seal the two surfaces of packaging material to form a tubular packaging 73 around the shelf.

La boîte de pliage 20 (non représentée) forme les plis latéraux 9 et le rabat 21.The folding box 20 (not shown) forms the side folds 9 and the flap 21.

Les bandes latérales chauffantes 22 chauffent la matière thermoscel­lable dans la zone des plis latéraux et les rouleaux presseurs 23 effectuent le scellage de ces plis latéraux.The side heating strips 22 heat the heat-sealable material in the area of the side folds and the pressure rollers 23 seal these side folds.

Des plieurs latéraux 14, mobiles dans le sens des doubles flèches E, assurent la mise en place de ces plis et un dispositif (voir fig. 3) replie le rabat 21. Ce rabat est ensuite scellé par le dispositif 50 (voir fig. 1).Lateral folders 14, movable in the direction of the double arrows E, ensure the placement of these folds and a device (see fig. 3) folds the flap 21. This flap is then sealed by the device 50 (see fig. 1 ).

Des organes de retournement, connus en soi et non représentés, retournent les tablettes 11 avant de les évacuer.Turning members, known per se and not shown, turn the shelves 11 over before removing them.

La fig. 6B reprend les éléments de la fig. 6A à partir du dispositif de retournement rotatif 16. Le conditionnement s'effectue comme précé­demment jusqu'à la mise en place des plis latéraux 9 et à celle du rabat 21.Fig. 6B repeats the elements of FIG. 6A from the rotary turning device 16. The packaging is carried out as above until the lateral folds 9 are put in place and that of the flap 21.

Ces tablettes sont en outre destinées à recevoir une banderolle 45. A cet effet, la ligne de conditionnement comporte une station d'alimentation 80 à deux rouleaux 81 et 82 de matériau d'emballage. Il s'agit généralement d'une feuille de papier imprimé. Cette feuille 83, préalablement découpée, est interposée sur la trajectoire des tablettes, puis est pliée d'une manière connue pour former un fourreau autour de ce produit. Les deux bords longitudinaux sont superposés puis collés l'un sur l'autre.These tablets are also intended to receive a banner 45. For this purpose, the packaging line comprises a supply station 80 with two rollers 81 and 82 of packaging material. It is usually a sheet of printed paper. This sheet 83, previously cut, is interposed on the path of the shelves, then is folded in a known manner to form a sheath around this product. The two longitudinal edges are superimposed and then glued to each other.

Ces différentes opérations ont permis tout d'abord d'effectuer un scellage longitudinal le long d'une des arêtes longitudinales du produit puis d'effectuer un scellage latéral au niveau des plis latéraux. En conséquence, le produit est emballé de façon étanche et répond aux exigences actuelles en matière de sécurité et d'hygiène.
Il est bien entendu que certaines fonctions pourraient être remplies par des moyens quelque peu différents de ceux qui ont été utilisés dans la forme de réalisation illustrée par les figures. Ainsi le dispositif de retournement suivi d'un transporteur linéaire pourrait être remplacé par un dispositif de retournement plus grand ou par plusieurs dispositifs de ce type ménagés à la suite les uns des autres et prévoyant à leur périphérie un ensemble de stations permettant d'effectuer toutes les opérations requises.These various operations made it possible first of all to carry out a longitudinal sealing along one of the longitudinal edges of the product then to carry out a lateral sealing at the level of the lateral folds. In As a result, the product is tightly packed and meets current safety and hygiene requirements.
It is understood that certain functions could be fulfilled by means somewhat different from those which have been used in the embodiment illustrated by the figures. Thus the turning device followed by a linear conveyor could be replaced by a larger turning device or by several devices of this type arranged one after the other and providing at their periphery a set of stations making it possible to perform all required operations.

La présente invention n'est pas limitée aux formes de réalisation décrites mais pourrait subir différentes modifications et se présenter sous diverses variantes évidentes pour l'homme de l'art.The present invention is not limited to the embodiments described but could undergo different modifications and come in various variants obvious to those skilled in the art.

Claims (9)

1. Procédé de conditionnement d'un produit, notamment d'un produit alimentaire, tel que par exemple une tablette de chocolat de forme sensiblement rectangulaire, dans un emballage scellé, dans lequel on amène le produit sur un transporteur linéaire et on positionne une feuille de matériau d'emballage thermoscellable rectangulaire sur la trajectoire de ce produit, caractérisé en ce que l'on entraîne simulta­nément le produit et le papier sur le transporteur linéaire en repliant la feuille autour du produit de manière à former deux volets de longueurs inégales respectivement adjacents aux grandes faces du produit, en ce que l'on introduit ensuite ce produit ainsi revêtu dans un logement d'un dispositif de retournement rotatif, en ce que l'on scelle les volets l'un sur l'autre le long d'un bord longitudinal dudit produit, ce qui a pour effet de former un rabat disposé sensiblement dans le prolongement de la grande face inférieure du produit, en ce que l'on forme les plis latéraux, en ce que l'on extrait le produit partiellement emballé après son retournement, le dispositif de retournement ayant pivoté de 180°, en ce que l'on scelle les plis latéraux, en ce que l'on replie ledit rabat et les plis latéraux sur la face inférieure du produit, cette face étant disposée au-dessus de produit par suite dudit retournement, et en ce que l'on scelle ce rabat contre ladite face inférieure.1. Method for packaging a product, in particular a food product, such as for example a chocolate bar of substantially rectangular shape, in a sealed package, in which the product is brought on a linear conveyor and a sheet is positioned of rectangular heat-sealable packaging material on the path of this product, characterized in that the product and the paper are simultaneously driven on the linear conveyor by folding the sheet around the product so as to form two flaps of unequal lengths respectively adjacent on the large faces of the product, in that the product thus coated is then introduced into a housing of a rotary turning device, in that the flaps are sealed one on the other along a longitudinal edge of said product, which has the effect of forming a flap disposed substantially in the extension of the large underside of the product, in that the lateral folds are formed, in that q ue extract the partially wrapped product after turning it over, the turning device having rotated 180 °, in that we seal the side folds, in that we fold up said flap and the side folds bottom of the product, this face being disposed above the product as a result of said inversion, and in that this flap is sealed against said bottom face. 2. Procédé selon la revendication 1, caractérisé en ce que l'on replie d'abord les plis latéraux puis ledit rabat par-dessus les plis latéraux.2. Method according to claim 1, characterized in that the side folds are first folded and then said flap over the side folds. 3. Procédé selon la revendication 1, caractérisé en ce que l'on replie d'abord le rabat puis lesdits plis latéraux par-dessus ledit rabat, et en ce que l'on dispose une banderolle imprimée autour du produit, cette banderolle étant constituée par une feuille rectangulaire enroulée autour du produit, de manière à former un manchon ouvert à ses extrémités et de manière à superposer deux bords de cette feuille.3. Method according to claim 1, characterized in that the flap is first folded and then said side folds over said flap, and in that there is a banner printed around the product, this banner being formed by a rectangular sheet wrapped around the product, so as to form a sleeve open at its ends and so as to superimpose two edges of this sheet. 4. Procédé selon la revendication 1, caractérisé en ce que l'on scelle les plis latéraux en préchauffant le matériau d'emballage thermoscellable au moyen de deux rubans de chauffage agencés pour avancer parallè­lement au produit disposé sur le transporteur linéaire, puis en exerçant une pression sur les plis en matériau thermoscellable préchauffé, au moyen de rouleaux presseurs refroidis, lesdits plis étant maintenus dans une position sensiblement perpendiculaire aux grandes faces du produit par au moins un élément d'appui et de guidage.4. Method according to claim 1, characterized in that the lateral folds are sealed by preheating the heat-sealable packaging material by means of two heating tapes arranged to advance parallel to the product placed on the linear conveyor, then by exerting a pressure on the plies of preheated heat-sealable material, by means of cooled pressure rollers, said plies being maintained in a position substantially perpendicular to the large faces of the product by at least one support and guide element. 5. Procédé selon la revendication 4, caractérisé en ce que l'on maintient les plis latéraux au moyen dudit élément d'appui et de guidage en déplaçant cet élément parallèlement et à la même vitesse que le produit, cet élément étant positionné entre les deux plis et au-dessus de la grande face supérieure du produit.5. Method according to claim 4, characterized in that the lateral folds are maintained by means of said support and guiding element by moving this element parallel and at the same speed as the product, this element being positioned between the two folds and above the large upper face of the product. 6. Dispositif de conditionnement d'un produit, notamment d'un produit alimentaire, tel que par exemple une tablette de chocolat de forme sensiblement rectangulaire, dans un emballage scellé, pour la mise en oeuvre du procédé selon la revendication 1, comportant un transporteur linéaire (10) pour amener les produits (11) à conditionner et un dispositif (12) pour positionner une feuille (13) d'un matériau d'emballage thermoscellable rectangulaire sur la trajectoire de ce produit, carac­térisé en ce qu'il comprend des moyens pour entraîner simultanément le produit et le papier sur le transporteur linéaire en repliant la feuille autour du produit de manière à former deux volets (14, 15) de longueurs inégales respectivement adjacents aux grandes faces de ce produit, un dispositif de retournement rotatif (16) comportant au moins un logement (17) pour recevoir un produit ainsi revêtu, des moyens (18, 19) pour sceller les volets l'un sur l'autre le long d'un bord longitudinal dudit produit, ce qui a pour effet de former un rabat (21) disposé sensiblement dans le prolongement de la grande face inférieure de ce produit, des moyens (20) pour former les plis latéraux (9), des moyens pour extraire le produit partiellement emballé, après son retournement, des moyens (22, 23) pour sceller les plis latéraux, des moyens pour amener le produit en butée dans au moins une station agencée pour replier ledit rabat et les plis latéraux, et pour coller ce rabat sur la face inférieure (43) du produit, cette face étant disposée au-dessus du produit par suite dudit retournement.6. Device for packaging a product, in particular a food product, such as for example a chocolate bar of substantially rectangular shape, in a sealed package, for the implementation of the method according to claim 1, comprising a conveyor linear (10) for bringing the products (11) to be packaged and a device (12) for positioning a sheet (13) of a rectangular heat-sealable packaging material on the path of this product, characterized in that it comprises means for simultaneously driving the product and the paper on the linear conveyor by folding the sheet around the product so as to form two flaps (14, 15) of unequal length respectively adjacent to the large faces of this product, a rotary turning device (16 ) comprising at least one housing (17) for receiving a product thus coated, means (18, 19) for sealing the flaps one on the other along a longitudinal edge of said product, this which has the effect of forming a flap (21) disposed substantially in the extension of the large underside of this product, means (20) for forming the lateral folds (9), means for extracting the partially wrapped product, after its turning, means (22, 23) for sealing the side folds, means for bringing the product into abutment in at least one station designed to fold said flap and the side folds, and for gluing this flap on the face bottom (43) of the product, this face being disposed above the product as a result of said reversal. 7. Dispositif selon la revendication 6, caractérisé en ce que lesdits moyens pour sceller les plis latéraux comportent deux rubans de chauffage (22) disposés de part et d'autre du produit, des moyens pour faire avancer ces rubans parallèlement aux produits disposés sur le transporteur linéaire, et au moins deux rouleaux presseurs (23) refroidis pour exercer une pression sur les plis latéraux en matériau d'emballage thermoscellable préchauffé, lesdits plis latéraux étant maintenus dans une position sensiblement perpendiculaire aux grandes faces du produit par au moins un élément d'appui et de guidage.7. Device according to claim 6, characterized in that said means for sealing the lateral folds comprise two heating tapes (22) arranged on either side of the product, means for advancing these tapes parallel to the products placed on the linear conveyor, and at least two pressure rollers (23) cooled to exert pressure on the side plies of preheated heat-sealable packaging material, said side plies being held in a position substantially perpendicular to the large faces of the product by at least one element of 'support and guidance. 8. Dispositif selon la revendication 7, caractérisé en ce que ledit élément d'appui et de guidage est constitué par une palette (24) montée sur une chaîne (25) de transport agencée pour déplacer cette palette parallè­lement au produit et à la même vitesse, cette palette ayant des dimensions et une forme telles qu'elle puisse s'engager entre les plis latéraux disposés sensiblement verticalement et offrir des appuis auxdits lis latéraux, lorsqu'ils sont soumis à la pression des organes presseurs.8. Device according to claim 7, characterized in that said support and guide element is constituted by a pallet (24) mounted on a transport chain (25) arranged to move this pallet parallel to the product and at the same speed , this pallet having dimensions and a shape such that it can engage between the lateral folds arranged substantially vertically and provide support for said lateral lilies, when they are subjected to the pressure of the pressing members. 9. Dispositif selon la revendication 6, caractérisé en ce que la station agencée pour replier ledit rabat comporte un dispositif élévateur (38) pour soulever le produit, des plieurs latéraux (44) pour rabattre lesdits plis latéraux et des butées mobiles de pliage (39, 42) pour replier ledit rabat.9. Device according to claim 6, characterized in that the station arranged for folding said flap comprises a lifting device (38) for lifting the product, lateral folders (44) for folding down said lateral folds and movable folding stops (39 , 42) for folding said flap.
EP88810312A 1987-05-12 1988-05-11 Method for packaging a product, and device for carrying out the method Expired - Lifetime EP0295203B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706760A FR2615166B1 (en) 1987-05-12 1987-05-12 PROCESS FOR PACKAGING A PRODUCT AND DEVICE FOR CARRYING OUT SAID PROCESS
FR8706760 1987-05-12

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EP0295203A1 true EP0295203A1 (en) 1988-12-14
EP0295203B1 EP0295203B1 (en) 1991-12-11

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EP88810312A Expired - Lifetime EP0295203B1 (en) 1987-05-12 1988-05-11 Method for packaging a product, and device for carrying out the method

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US (1) US4909019A (en)
EP (1) EP0295203B1 (en)
JP (1) JPS6445213A (en)
CN (1) CN88102751A (en)
DE (1) DE3866792D1 (en)
FR (1) FR2615166B1 (en)

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Also Published As

Publication number Publication date
JPS6445213A (en) 1989-02-17
US4909019A (en) 1990-03-20
FR2615166A1 (en) 1988-11-18
CN88102751A (en) 1988-11-30
DE3866792D1 (en) 1992-01-23
EP0295203B1 (en) 1991-12-11
FR2615166B1 (en) 1989-08-11

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