EP0056345A1 - Packaging process and device for industrial bakery or pastry products having a middle-sealed moisture - Google Patents

Packaging process and device for industrial bakery or pastry products having a middle-sealed moisture Download PDF

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Publication number
EP0056345A1
EP0056345A1 EP82400019A EP82400019A EP0056345A1 EP 0056345 A1 EP0056345 A1 EP 0056345A1 EP 82400019 A EP82400019 A EP 82400019A EP 82400019 A EP82400019 A EP 82400019A EP 0056345 A1 EP0056345 A1 EP 0056345A1
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EP
European Patent Office
Prior art keywords
bag
article
packaging
articles
film
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.)
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EP82400019A
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German (de)
French (fr)
Inventor
André Lucas
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Gringoire-Brossard Dite Ste
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Gringoire-Brossard Dite Ste
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Publication of EP0056345A1 publication Critical patent/EP0056345A1/en
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    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/16—Packaging bread or like bakery products, e.g. unsliced loaves
    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation

Definitions

  • the invention relates to a method and a device for packaging industrial bakery or pastry articles with intermediate humidity, more particularly for pre-packaging these articles in a heat-sealable film bag.
  • the present invention specifically aims to provide a method of packaging these industrial bakery / pastry items with intermediate humidity by sealing them in a sachet or pre-packaging case in a film of a heat-sealable plastic material allowing these articles to be then adequately sterilized and allowing, in addition, after the sterilization step, to verify very simply by rapid inspection the quality of the sealing of the film around the article.
  • the packaging method comprising the step of sealing under a plastic film bag the cooked or pre-cooked article, comprises the step of expelling most of the air contained in the film bag partially sealed around the article, for draping the film around the article, before sealing the bag.
  • the packaging device for the implementation of this method, comprising a conveyor for transferring the articles; a packaging film feeder, shaping means giving the film a form of a longitudinally welded tubular sachet, and a sealing / cutting knife for the case along a line perpendicular to the longitudinal direction of the sachet comprises means for temporarily applying a controlled pressure on at least the upper face of the article placed in the pre-sealed tubular bag in sequence with the actuation of the sealing-cutting knife.
  • the application of controlled pressure is carried out by a pad of elastic material or by a blowing tunnel directing jets of fluid under pressure at high speed. on the faces of the article.
  • FIG. 1 a portion of a production and packaging line for industrial bakery / pastry items where, at the outlet of one. baking or pre-baking oven 1, the articles 2 are conveyed on a conveyor 3 to a prepacking and sealing station 4 of the articles in a film bag made of heat-sealable plastic material, after which the article thus pre -packaged and sealed 2 'is routed to a sterilization tunnel 5, for example of the infrared type.
  • the article to be packaged is a bakery article in the form of a flat cake, for example a pre-cooked pizza base (humidity of the order of 25%)
  • the article to be packaged is a pastry article consisting of a cake 20, for example that marketed by the applicant under the name "savannah" (humidity of the order of 15% to 19%), placed in a metal tray or mold 21.
  • the cooked or pre-cooked articles are conveyed continuously by the conveyor 3 to be introduced into a sheath forming a tubular bag 6, made of a plastic film 7 unwound from 'a supply reel 8.
  • the flat film 7 is gradually shaped to take a tubular configuration, the side edges 9 and 9' of the film being gradually brought closer to each other downwards, to be secured by a longitudinal continuous weld 10, the film bag being sealed, in two stages, on either side of the article received in the bag by a sealing-cutting knife 11, 11 ' separating the previously completely sealed upstream bag from the following pre-sealed bag by a cutting line 12 transverse to the longitudinal direction of the tubular bag by forming on either side of this cutting line 12 a first end weld 13, frontal for the subsequent case, and a second weld 13 ', terminal for the completely sealed front case.
  • the article to be packaged 2 is therefore introduced continuously by its side still open in a bag, partially sealed using
  • a controlled pressure represented by the arrow 14 is applied to at least the upper face of the pre-sealed bag containing the article in order to expel most of the air therefrom and achieve a relatively narrow draping of the film on the article before final tight sealing.
  • the expulsion of most of the air contained in the bag of pre-sealed film is carried out, for flat articles 2, by means of at least one pad of elastic material 15, for example of cellular foam, carried by a rigid reinforcement 16 which can be actuated selectively, for example by jack, as shown by the arrow 17 in FIG. 3, in order to firmly apply and overwrite the pad 15 on the partially prepackaged article, the sealing-cutting knife 11 then being lowered to form the weld lines 13 ′ and 13 and the cutout 12 (FIG. 4), the pad 15 then being raised for a new operation.
  • the displacement travel of the frame 16 is determined as a function of the thicknesses of the article 2 and of the cushion 15 and of the compressibility of the latter.
  • the pad 15 is here replaced by a blowing tunnel 18 defining, above the conveyor 3, side walls 19 and an upper wall 22 between which the article received in the tubular film passes (FIG. 7 and left part of FIG. 6), these walls being provided with nozzles making it possible to direct jets of high pressure air speed 23 against the lateral and upper faces of the article partially wrapped in the pre-sealed tubular bag 6 (right part of FIG. 6 and FIG. 8).
  • the nozzles are connected via controllable control means, via a 24 ° air duct, to a source of pressurized air or gas.
  • the tunnel may also advantageously include front nozzles delivering air jets 24 on the front part of the prepackaged article.
  • the application of high speed air jets 23 and 24 causes the film to be clad or draped over the article, as shown on the right side of Figure 6 and Figure 8 expelling most of the air contained in the pre-sealed bag, the sealing-cutting knife 11 11 'then being actuated, as shown by the arrow 25, to seal the film bag in its configuration draped around the article, in the same way as previously described in relation to FIG. 4.
  • the blowing installation is determined to produce air jets having an outlet speed greater than 850 meters per minute, preferably of the order of 900 to 920 meters per minute.
  • the pad support mechanism or the blowing tunnel can be mounted on a chassis with alternating rectilinear displacement in the direction of advance of the conveyor 3 to accompany the article at least temporarily in its movement and increase the duration of pressure application on the article in order to optimally express the air contained in the sealed bag and result in a narrow draping of the film of the bag around the article.
  • the prepacking films are made of a material based on polyester or polypropylene polyamides with a softening temperature above 100 °, typically in one: polyester-polypropylene complex allowing infrared radiation to pass through for the subsequent sterilization step in the tunnel 5.
  • the infrared lamps are advantageously distributed on the top and on the bottom of the oven to radiate on both sides of the article.

Abstract

The process consists in introducing, on a continuous belt, the successive products into a partially sealed tubular bag of plastics film (6), and in applying a pressure (14) to at least the upper face of the product in the bag so as to expel the major part of the air contained in the bag; the latter is then completely sealed and cut with a cutter (11) in order to be transported prepacked in a leaktight bag towards a sterilising station (5). In the case of flat products, the pressure is applied by means of a runner of elastic material and, in the case of products with voluminous configuration, by a blowing tunnel which delivers high-speed jets of air onto the product in its bag. <IMAGE>

Description

La présente. invention concerne un procédé et un dispositif de conditionnement d'articles de boulangerie ou de pâtisserie industrielle à humidité intermédiaire, plus particulièrement de pré-emballage de ces articles dans un sachet de film thermoscellable.The current. The invention relates to a method and a device for packaging industrial bakery or pastry articles with intermediate humidity, more particularly for pre-packaging these articles in a heat-sealable film bag.

Parmi les procédés d'emballages d'articles sous film plastique, on connaît l'utilisation de films thermoré- tractables ainsi que les techniques de mise sous vide avant scellage de l'article dans son enveloppe de film. Dans le domaine alimentaire et, plus particulièrement, dans celui de la boulangerie/pâtisserie industrielle, les articles à moyenne conservation, notamment cuits ou pré-cuits, doivent subir une stérilisation ou une pasteurisation avant leur emballage final dans un conteneur cartonné, cette stérilisation devant s'effectuer sur l'article pré-emballé dans un film plastique étanche pour garantir la totale absence de germes requise dans l'article emballé. L'utilisation de films thermorétrac- tables ne se prête guère à l'opération ultérieure de stérilisation et la mise sous vide avant scellage du sachet de film emballant l'article, outre l'augmentation afférente des coûts de production, pose des problèmes avec les articles dits à-humidité intermédiaire en raison du dégazage non contrôlé de l'humidité contenue dans ces articles lors de la stérilisation. Par articles alimentaires à humidité intermédiaire on entend des articles comportant de 15 à 45 % d'humidité par rapport au poids de-matières sèches, ce qui est précisément la gamme d'humidité rencontrée dans les articles de boulangerie ou de pâtisserie industrielle cuits ou pré-cuits.Among the methods of packaging articles in plastic film, the use of heat-shrinkable films is known, as well as the techniques of evacuating before sealing the article in its film envelope. In the food sector and, more particularly, in that of industrial bakery / pastry making, articles with medium preservation, in particular cooked or pre-cooked, must undergo sterilization or pasteurization before their final packaging in a cardboard container, this sterilization before be carried out on the pre-packaged article in a waterproof plastic film to guarantee the total absence of germs required in the packaged article. The use of heat-shrinkable films hardly lends itself to the subsequent sterilization operation and the vacuum before sealing of the film bag packaging the article, in addition to the associated increase in production costs, poses problems with so-called intermediate humidity articles due to the uncontrolled degassing of the humidity contained in these articles during sterilization. By food items with intermediate humidity one means articles comprising from 15 to 45% humidity relative to the weight of dry matter, which is precisely the range of humidity found in baked or pre-cooked industrial bakery or pastry articles.

La présente invention a précisément pour objet de proposer un procédé de conditionnement de ces articles de boulangerie/pâtisserie industrielle à humidité intermédiaire par scellage de ces derniers dans un sachet ou étui de pré-emballage en un film d'un matériau plastique thermosoudable permettant à ces articles d'être ensuite stérilisés de façon adéquate et permettant, en outre, après l'étape de stérilisation, de vérifier très simplement par une inspection rapide la qualité du scellage du film autour de l'article.The present invention specifically aims to provide a method of packaging these industrial bakery / pastry items with intermediate humidity by sealing them in a sachet or pre-packaging case in a film of a heat-sealable plastic material allowing these articles to be then adequately sterilized and allowing, in addition, after the sterilization step, to verify very simply by rapid inspection the quality of the sealing of the film around the article.

Pour ce faire, selon une caractéristique de la présente invention, le procédé de conditionnement, comportant l'étape de sceller sous sachet de film en matériau plastique l'article cuit ou pré-cuit, comprend l'étape d'expulser la majeure partie de l'air contenu dans le sachet de film partiellement scellé autour de l'article, pour effectuer un drapage du film autour de l'article, avant le scellage étanche du sachet.To do this, according to a characteristic of the present invention, the packaging method, comprising the step of sealing under a plastic film bag the cooked or pre-cooked article, comprises the step of expelling most of the air contained in the film bag partially sealed around the article, for draping the film around the article, before sealing the bag.

Selon une autre caractéristique de la présente invention, le dispositif de conditionnement selon l'invention, pour la mise en oeuvre de ce procédé, comprenant un convoyeur de transfert des articles; un alimenteur de film d'emballage, des moyens conformateurs conférant au film une forme de sachet tubulaire soudé longitudinalement, et un couteau de scellage/ découpage de l'étui suivant une ligne perpendiculaire à la direction longitudinale du sachet comporte des moyens pour appliquer temporairement une pression contrôlée sur au moins la face supérieure de l'article disposé dans le sachet tubulaire pré-scellé en séquence avec l'actionnement du couteau de scellage-découpage.According to another characteristic of the present invention, the packaging device according to the invention, for the implementation of this method, comprising a conveyor for transferring the articles; a packaging film feeder, shaping means giving the film a form of a longitudinally welded tubular sachet, and a sealing / cutting knife for the case along a line perpendicular to the longitudinal direction of the sachet comprises means for temporarily applying a controlled pressure on at least the upper face of the article placed in the pre-sealed tubular bag in sequence with the actuation of the sealing-cutting knife.

Selon que les articles à conditionner sont plats ou volumineux, l'application de pression contrôlée s'effectue par un patin en matériau élastique ou par un tunnel de soufflage dirigéant des jets de fluide sous pression à grande vitesse sur les faces de l'article.Depending on whether the articles to be packaged are flat or bulky, the application of controlled pressure is carried out by a pad of elastic material or by a blowing tunnel directing jets of fluid under pressure at high speed. on the faces of the article.

D' autres caractéristiques et avantages de la présente invention ressortiront de la description suivante de modes de réalisation, donnés à titre illustratif mais nullement limitatif, faite en relation avec les dessins annexés, sur lesquels :

  • La figure 1 est une vue schématique d'une chaîne de conditionnement incorporant un dispositif pour la mise en oeuvre du procédé selon la présente invention;
  • Les figures 2 et 3 sont des vues réprésentant les différentes phases de mise en oeuvre du procédé selon l'invention, pour l'emballage à scellement d'articles plats;
  • La figure 5 est une vue schématique du dessus de l'article disposé dans le sachet tubulaire de film pré-scellé correspondant à l'étape de la figure 2;
  • La figure 6 est une vue de face d'un tunnel de soufflage pour la mise en oeuvre du procédé selon l'invention à propos d'articles volumineux; et
  • Les figures 7 et 8 représentent deux étapes successives du drapage de l'article avec le dispositif à tunnel de la figure 6.
Other characteristics and advantages of the present invention will emerge from the following description of embodiments, given by way of illustration but in no way limiting, made in relation to the appended drawings, in which:
  • Figure 1 is a schematic view of a packaging line incorporating a device for implementing the method according to the present invention;
  • Figures 2 and 3 are views showing the different phases of implementation of the method according to the invention, for the sealing packaging of flat articles;
  • Figure 5 is a schematic top view of the article disposed in the tubular sachet of pre-sealed film corresponding to the step of Figure 2;
  • FIG. 6 is a front view of a blowing tunnel for implementing the method according to the invention with regard to bulky articles; and
  • FIGS. 7 and 8 represent two successive stages of draping the article with the tunnel device of FIG. 6.

On a représenté schématiquement sur la figure 1, une portion d'une chaîne de fabrication et de conditionnement d'articles de boulangerie/pâtisserie industrielle où, à la sortie d'un. four de cuisson ou de pré-cuisson 1, les articles 2 sont acheminés sur un convoyeur 3 vers un poste de pré- emballage et de scellage 4 des articles dans un sachet de.film en matériau plastique thermosoudable, après quoi l'article ainsi pré-emballé et scellé 2' est acheminé vers un tunnel de stérilisation 5, par exemple du type à infrarouges. Sur les figures 1 à 5, l'article à conditionner est un article de boulangerie se présentant sous la forme d'une galette plate, par exemple un fond pré-cuit de pizza (humidité de l'ordre de 25 %),alors que sur les figures 6 à 8, l'article à conditionner est un article de pâtisserie constitué d'un gâteau 20, par exemple celui commercialisé par la demanderesse sous l'appellation "savane" (humidité de l'ordre de 15 % à 19 %), disposé dans une barquette ou moule métallique 21.There is shown diagrammatically in FIG. 1, a portion of a production and packaging line for industrial bakery / pastry items where, at the outlet of one. baking or pre-baking oven 1, the articles 2 are conveyed on a conveyor 3 to a prepacking and sealing station 4 of the articles in a film bag made of heat-sealable plastic material, after which the article thus pre -packaged and sealed 2 'is routed to a sterilization tunnel 5, for example of the infrared type. In FIGS. 1 to 5, the article to be packaged is a bakery article in the form of a flat cake, for example a pre-cooked pizza base (humidity of the order of 25%), whereas in FIGS. 6 to 8, the article to be packaged is a pastry article consisting of a cake 20, for example that marketed by the applicant under the name "savannah" (humidity of the order of 15% to 19%), placed in a metal tray or mold 21.

Dans tous les cas, au niveau du poste de conditionnement 4, les articles cuits ou pré-cuits sont acheminés en continu par le convoyeur 3 pour être introduits dans une gaine formant sachet tubulaire 6, en un film en matériau plastique 7 dévidé à partir d'une bobine d'alimentation 8. Comme on le voit mieux sur la figure 5, le film plan 7 est progressivement conformé pour prendre une configuration tubulaire, les bords latéraux 9 et 9' du film étant progressivement rapprochés l'un de l'autre vers le bas, pour être solidarisés par une soudure continue longitudinale 10, le sachet de film étant scellé, en deux temps, de part et d'autre de l'article reçu dans le sachet par un couteau de scellage-découpage 11, 11' désolidarisant le sachet amont précédemment complètement scellé du sachet pré-scellé suivant par une ligne de coupe 12 transversale à la direction longitudinale du sachet tubulaire en formant de part et d'autre de cette ligne de découpe 12 une première soudure d'extrémité 13, frontale pour l'étui ultérieur, et une seconde soudure 13', terminale pour l'étui antérieur complètement scellé. Au niveau du poste de conditionnement 4, l'article à emballer 2 est donc introduit en continu par son côté encore ouvert dans un sachet, partiellement scellé suivant la technique dite du scellage trois côtés.In all cases, at the packaging station 4, the cooked or pre-cooked articles are conveyed continuously by the conveyor 3 to be introduced into a sheath forming a tubular bag 6, made of a plastic film 7 unwound from 'a supply reel 8. As best seen in Figure 5, the flat film 7 is gradually shaped to take a tubular configuration, the side edges 9 and 9' of the film being gradually brought closer to each other downwards, to be secured by a longitudinal continuous weld 10, the film bag being sealed, in two stages, on either side of the article received in the bag by a sealing-cutting knife 11, 11 ' separating the previously completely sealed upstream bag from the following pre-sealed bag by a cutting line 12 transverse to the longitudinal direction of the tubular bag by forming on either side of this cutting line 12 a first end weld 13, frontal for the subsequent case, and a second weld 13 ', terminal for the completely sealed front case. At the packaging station 4, the article to be packaged 2 is therefore introduced continuously by its side still open in a bag, partially sealed using the technique known as three-side sealing.

Comme représenté schématiquement sur la figure 1, avant que le couteau 11 n'effectue le scellage aval 13', et la séparation du sachet scellé amont du corps du sachet tubulaire pré-scellé aval 6, une pression contrôlée, figurée par la flèche 14, est appliquée sur au moins la face supérieure du sachet pré-scellé contenant l'article pour en expulser la majeure partie de l'air et réaliser un drapage relativement étroit du film sur l'article avant scellage étanche final. Lorsque l'article ainsi scellé 2', subit l'étape de stérilisation dans le tunnel 5, on constate un gonflement assez tendu du sachet scellé avec condensation de gouttelettes d'eau à la suite du dégazage partiel de l'article dans le tunnel de stérilisation. L'absence de gonflement du sachet scellé de pré- emballage à la sortie du tunnel 5 permet ainsi de constater la non-étanchéité de celui-ci, due généralement à de mauvaises soudures ou à des perforations du film, ce qui permet de retirer l'article en question, de le déshabiller et de le recycler éventuellement à l'entrée du poste de conditionnement 4. Lors de l'étape ultérieure de refroidissement à l'air libre des articles scellés et stérilisés, le sachet de pré-emballage se resserre progressivement pour draper de nouveau étroitement l'article, l'eau ou la vapeur d'eau étant réabsorbée par ce dernier.As shown schematically in FIG. 1, before the knife 11 performs the downstream sealing 13 ′, and the separation of the upstream sealed bag from the body of the downstream pre-sealed tubular bag 6, a controlled pressure, represented by the arrow 14, is applied to at least the upper face of the pre-sealed bag containing the article in order to expel most of the air therefrom and achieve a relatively narrow draping of the film on the article before final tight sealing. When the article thus sealed 2 ′ undergoes the sterilization step in tunnel 5, there is a fairly tight swelling of the sealed sachet with condensation of water droplets following the partial degassing of the article in the tunnel of sterilization. The absence of swelling of the sealed pre-packaging bag at the exit of the tunnel 5 thus makes it possible to note the non-sealing of the latter, generally due to poor welding or perforation of the film, which makes it possible to remove the article in question, undress it and possibly recycle it at the entrance to the packaging station 4 During the subsequent step of cooling the sealed and sterilized articles in the open air, the pre-packaging bag gradually tightens to drape the article again tightly, the water or water vapor being reabsorbed by this last.

Comme représenté plus en détail sur les figures 2 à 4, l'expulsion de la majeure partie de l'air contenu dans le sachet du film pré-scellé s'effectue, pour des articles plats 2, au moyen d'au moins un patin de matériau élastique 15, par exemple en mousse cellulaire, porté par une armature rigide 16 actionnable sélectivement, par exemple par vérin, comme figuré par la flèche 17 sur la figure 3, pour venir appliquer fermement et écraser à débordement le patin 15 sur l'article partiellement pré-emballé, le couteau de scellage-découpage 11 étant alors abaissé pour former les lignes de soudure 13' et 13 et la découpe 12 (figure 4), le patin 15 étant ensuite relevé pour une nouvelle opération. La course de déplacement du cadre 16 est déterminée en fonction des épaisseurs de l'article 2 et du coussin 15 et de la compressibilité de ce dernier.As shown in more detail in Figures 2 to 4, the expulsion of most of the air contained in the bag of pre-sealed film is carried out, for flat articles 2, by means of at least one pad of elastic material 15, for example of cellular foam, carried by a rigid reinforcement 16 which can be actuated selectively, for example by jack, as shown by the arrow 17 in FIG. 3, in order to firmly apply and overwrite the pad 15 on the partially prepackaged article, the sealing-cutting knife 11 then being lowered to form the weld lines 13 ′ and 13 and the cutout 12 (FIG. 4), the pad 15 then being raised for a new operation. The displacement travel of the frame 16 is determined as a function of the thicknesses of the article 2 and of the cushion 15 and of the compressibility of the latter.

Pour la mise en oeuvre du procédé de l'invention au drapage d'articles plus volumineux, tels que les gâteaux 20 dans leur moule 21, le patin 15 est ici substitué par un tunnel de soufflage 18 définissant,au-dessus du convoyeur 3,des parois latérales 19 et une paroi supérieure 22 entre lesquelles passe l'article reçu dans le film tubulaire (figure 7 et partie gauche de la figure 6), ces parois étant pourvues de tuyères permettant de diriger des jets d'air sous pression à grande vitesse 23 contre les faces latérales et supérieure de l'article partiellement emballé dans le sachet tubulaire pré-scellé 6 (partie droite de la figure 6 et figure 8). Les tuyères sont raccordées par l'intermédiaire de moyens de contrôle commandables, via une canalisation d'air 24°, à une source d'air ou de gaz sous pression. Le tunnel peut également comporter avantageusement des tuyères frontales délivrant des jets d'air 24 sur la partie avant de l'article pré-emballé. L'application des jets d'air à grande vitesse 23 et 24 provoque un placage ou un drapage du film sur l'article, comme figuré sur la partie droite de la figure 6 et la figure 8 expulsant la plus grande partie de l'air contenu dans le sachet pré- scellé , le couteau de scellage-découpage 11 11' étant alors actionné, comme figuré par la flèche 25, pour sceller de façon étanche le sachet de film dans sa configuration drapée autour de l'article, de la même façon que précédemment décrit en relation avec la figure 4. L'installation de soufflage est déterminée pour produire des jets d'air ayant une vitesse de sortie supérieure à 850 mètres par-minute, de préférence de l'ordre de 900 à 920 mètres par minute.For the implementation of the method of the invention for draping larger items, such as cakes 20 in their mold 21, the pad 15 is here replaced by a blowing tunnel 18 defining, above the conveyor 3, side walls 19 and an upper wall 22 between which the article received in the tubular film passes (FIG. 7 and left part of FIG. 6), these walls being provided with nozzles making it possible to direct jets of high pressure air speed 23 against the lateral and upper faces of the article partially wrapped in the pre-sealed tubular bag 6 (right part of FIG. 6 and FIG. 8). The nozzles are connected via controllable control means, via a 24 ° air duct, to a source of pressurized air or gas. The tunnel may also advantageously include front nozzles delivering air jets 24 on the front part of the prepackaged article. The application of high speed air jets 23 and 24 causes the film to be clad or draped over the article, as shown on the right side of Figure 6 and Figure 8 expelling most of the air contained in the pre-sealed bag, the sealing-cutting knife 11 11 'then being actuated, as shown by the arrow 25, to seal the film bag in its configuration draped around the article, in the same way as previously described in relation to FIG. 4. The blowing installation is determined to produce air jets having an outlet speed greater than 850 meters per minute, preferably of the order of 900 to 920 meters per minute.

Dans l'un ou l'autre des modes de réalisation, notamment pour les installations à grande cadence linéaire, le mécanisme de support de patin ou le tunnel de soufflage peuvent être montés sur un châssis à déplacement rectiligne alternatif suivant la direction d'avancement du convoyeur 3 pour accompagner au moins temporairement l'article dans son déplacement et augmenter la durée d'application de pression sur l'article afin d'exprimer de façon optimale l'air contenu dans le sachet scellé et aboutir à un drapage étroit du film du sachet autour de l'article.In one or other of the embodiments, in particular for installations with a high linear rate, the pad support mechanism or the blowing tunnel can be mounted on a chassis with alternating rectilinear displacement in the direction of advance of the conveyor 3 to accompany the article at least temporarily in its movement and increase the duration of pressure application on the article in order to optimally express the air contained in the sealed bag and result in a narrow draping of the film of the bag around the article.

Les films de pré-emballage sont réalisés en un matériau à base de polyamides de polyester ou de polypropylène à température de ramollissement supérieure à 100° , typiquement en un : complexe polyester-polypropylène laissant passer les radiations infrarouges pour l'étape ultérieure de stérilisation dans le tunnel 5. Pour les articles plats, les lampes à infrarouges sont avantageusement réparties sur le haut et sur le bas du four pour rayonner sur les deux faces de l'article.The prepacking films are made of a material based on polyester or polypropylene polyamides with a softening temperature above 100 °, typically in one: polyester-polypropylene complex allowing infrared radiation to pass through for the subsequent sterilization step in the tunnel 5. For flat articles, the infrared lamps are advantageously distributed on the top and on the bottom of the oven to radiate on both sides of the article.

Quoique la présente invention ait été décrite en relation avec des modes de réalisation particuliers,elle ne s'en trouve pas limitée mais est au contraire susceptible de modifications et de variantes qui apparaîtront à l'homme de l'art.Although the present invention has been described in relation to particular embodiments, it is not limited thereto but is on the contrary subject to modifications and variants which will appear to those skilled in the art.

Claims (13)

1.Procédé de conditionnement d'articles de boulangerie/ pâtisserie industrielle à humidité intermédiaire,comprenant les étapes d'introduire l'article dans un sachet tubulaire de film de préemballage en matériau plastique ayant une extrémité frontale déjà fermée,dlexpulser au moins partiellement l'air contenu dans le sachet,puis de sceller le sachet autour de l'article,caractérisé en ce qu'il comprend les étapes suivantes : introduire chacun des articles acheminés successivement en continu sur un convoyeur dans un sachet tubulaire formé en continu,soudé partiellement longitudinalement et fermé en bout,le bord avant de l'article venant contre le bout fermé du sachet;appliquer sur au moins la surface supérieure de l'article dans le sachet demeurant ouvert en aval une force extérieure pour expulser la majeure partie de l'air contenu dans le sachet;et sceller ensuite le sachet autour de l'article, en aval de celui-ci.1.The packaging products from bakery / confectionery industry intermediate moisture, comprising the steps of inserting the article in a pre-packaging film tubular bag of plastic material having a front end already closed, to expel the at least partially the air contained in the bag, then to seal the bag around the article, characterized in that it comprises the following stages: introducing each of the articles conveyed successively continuously on a conveyor in a tubular bag formed continuously, welded partially longitudinally and closed at the end, the front edge of the article coming against the closed end of the bag; apply on at least the upper surface of the article in the bag remaining open downstream an external force to expel most of the air in the bag; and then seal the bag around the item, downstream of it. 2.Procédé selon la revendication l,caractérisé en ce que les opérations d'expulsion de l'air et de scellage du sachet s'effectuent pendant que l'article est en déplacement sur le convoyeur.2. Method according to claim l, characterized in that the operations of expelling the air and sealing the bag are carried out while the article is moving on the conveyor. 3.Procédé selon la revendication 1 ou la revendication 2,caractérisé en ce que l'article scellé dans son sachet de pré-emballage est ensuite soumis à stérilisation.3. Method according to claim 1 or claim 2, characterized in that the article sealed in its pre-packaging bag is then subjected to sterilization. 4.Procédé selon l'une des revendications 1 à 3,pour le conditionnement d'articles plats,caractérisé en ce que le drapage s'effectue par application d'au moins un patin de matériau élastique sur au moins la face supérieure de l'article disposé dans le sachet partiellement scellé.4. Method according to one of claims 1 to 3, for the packaging of flat articles, characterized in that the draping is carried out by applying at least one pad of elastic material on at least the upper face of the item placed in partially sealed bag. 5.Procédé selon l'une des revendications 1 à 3,pour le conditionnement d'articles à configuration en volume,caractérisé en ce que le drapage s'effectue par des jets de fluide dirigés contre les parois latérales de l'article disposé dans le sachet partiellement scellé.5. Method according to one of claims 1 to 3, for packaging articles with volume configuration, characterized in that the draping is carried out by jets of fluid directed against the side walls of the article placed in the partially sealed bag. 6.Procédé selon l'une quelconque des revendications 3 à 5,caractérisé en ce que le film est en matériau à base choisie parmi les polyamides,les polyesters et les polypropylènes.6. Method according to any one of claims 3 to 5, characterized in that the film is made from a base material chosen from polyamides, polyesters and polypropylenes. 7.Procédé selon la revendication 6,caractérisé en ce que le film est un complexe polyester-polypropylène laissant passer les radiations infrarouges.7. Method according to claim 6, characterized in that the film is a polyester-polypropylene complex letting pass infrared radiation. 8.Procédé selon la revendication 7, caractérisé en ce que la stérilisation s'effectue dans un tunnel à infrarouges.8. Process according to claim 7, characterized in that sterilization takes place in an infrared tunnel. 9.Dispositif de conditionnement d'articles de boulangerie/pâtisse- . rie industrielle à humidité intermédiaire pour la mise en oeuvre du procédé selon la revendication 1, comprenant un moyen de présentation d'un étui tubulaire ayant une extrémité frontale fermée sur le trajet d'acheminement d'articles,des moyens pour expulser au moins partiellement l'air contenu dans le sachet contenant l'article, et des moyens pour sceller le sachet autour de l'article,caractérisé en ce qu'il comprend un alimenteur de film de pré-emballage,des moyens conférant au film une forme de sachet tubulaire soudé partiellement longitudinalement et pour présenter ce sachet tubulaire sur le trajet d'acheminement des articles, un couteau de scellage-découpage du sachet suivant une ligne perpendiculaire à la direction longitudinale du sachet, et des moyens (15;23,24),en amont du couteau de scellage-découpage par rapport à la direction d'avancement des articles pour appliquer temporairement une pression contrôlée sur au moins la face supérieure de l'article (2;20) introduit dans le sachet tubulaire pré-scellé (6) en séquence avec l'actionnement du couteau de scellage-découpage.9. Packaging device for bakery / pastry items. intermediate humidity industrial process for carrying out the method according to claim 1, comprising means for presenting a tubular case having a closed front end on the article transport path, means for at least partially expelling l air contained in the sachet containing the article, and means for sealing the sachet around the article, characterized in that it comprises a pre-packaging film feeder, means giving the film a form of tubular sachet partially welded longitudinally and in order to present this tubular bag on the route for conveying the articles, a sealing-cutting knife for the bag along a line perpendicular to the longitudinal direction of the bag, and means (15; 23,24), upstream of the sealing-cutting knife with respect to the direction of advancement of the articles to temporarily apply a controlled pressure on at least the upper face of the article (2; 20) introduced into the s Purchased tubular pre-sealed (6) in sequence with the actuation of the sealing-cutting knife. 10.Dispositif selon la revendication 9,pour le conditionnement d'articles plats,caractérisé en ce que les moyens d'application de pression comprennent au moins un patin en un matériau élastique (15) déplaçable sélectivement dans une direction perpendiculaire à la face supérieure de l'article (2) dans le sachet (6) pour s'appliquer sur celui-ci.10. Device according to claim 9, for the packaging of flat articles, characterized in that the pressure application means comprise at least one pad of an elastic material (15) selectively displaceable in a direction perpendicular to the upper face of the article (2) in the bag (6) to be applied thereon. Il.Dispositif selon la revendication 9,pour le conditionnement d'articles à configuration en volume,caractérisé en ce que le moyen d'application de pression comprend une tête de soufflage (18) formant un tunnel (19,22) et délivrant sur la face supérieure de l'article et sur les deux faces latérales de celui-ci et des jets de fluide sous pression à grande vitesse (23,24).Il.A device according to claim 9, for the packaging of articles with volume configuration, characterized in that the pressure applying means comprises a blowing head (18) forming a tunnel (19,22) and delivering on the upper face of the article and on the two lateral faces of the article and jets of fluid under pressure at high speed (23,24). 12.Dispositif selon la revendication 11, caractérisé en ce que le fluide est éjecté à une vitesse de sortie-supérieure à 850 mêtres/minute.12. Device according to claim 11, characterized in that the fluid is ejected at an output speed-greater than 850 meters / minute. .13.Dispositif selon l'une quelconque des revendications 9 à 12,caractérisé en ce que les moyens dtapplication de pression sont montés sur un bâti déplaçable dans la direction de déplacement des articles pour accompagner ceux-ci lors de l'application de pression..13.Dispositif according to any one of claims 9 to 12, characterized in that the d t pressure-applying means are mounted on a movable frame in the direction of article movement to accompany thereof upon application of pressure.
EP82400019A 1981-01-08 1982-01-07 Packaging process and device for industrial bakery or pastry products having a middle-sealed moisture Withdrawn EP0056345A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8100222A FR2497492B1 (en) 1981-01-08 1981-01-08 PROCESS AND DEVICE FOR PACKAGING INDUSTRIAL BAKERY / PASTRY ITEMS WITH INTERMEDIATE MOISTURE
FR8100222 1981-01-08

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EP0056345A1 true EP0056345A1 (en) 1982-07-21

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703023A1 (en) * 1993-03-25 1994-09-30 Grace Sa Method for packaging any products in containers such as, for example, trays, and machine including application of this method
US5351463A (en) * 1991-11-07 1994-10-04 Sara Lee/De N.V. Method and apparatus for making a filled and closed vacuum pak
NL1007594C2 (en) * 1997-11-20 1999-05-26 Borgesius Holding Bv Packaging system for solid foodstuffs, e.g. filled bread rolls
ES2149071A1 (en) * 1997-08-01 2000-10-16 Munoz Fernandez Francisco Machine for wrapping food products, preferably powder products

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH337448A (en) * 1955-01-05 1959-03-31 Dehne Rudolf Method for keeping fresh food fresh, in particular baked goods in cut form
US3471990A (en) * 1967-01-03 1969-10-14 Johnson Co Gordon Apparatus for and method of stretching,sealing and removing the tab from packages
FR2307723A1 (en) * 1975-04-14 1976-11-12 Unilever Nv MEANS AND METHOD OF PACKAGING FOODS CONTAINING WATER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH337448A (en) * 1955-01-05 1959-03-31 Dehne Rudolf Method for keeping fresh food fresh, in particular baked goods in cut form
US3471990A (en) * 1967-01-03 1969-10-14 Johnson Co Gordon Apparatus for and method of stretching,sealing and removing the tab from packages
FR2307723A1 (en) * 1975-04-14 1976-11-12 Unilever Nv MEANS AND METHOD OF PACKAGING FOODS CONTAINING WATER

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5351463A (en) * 1991-11-07 1994-10-04 Sara Lee/De N.V. Method and apparatus for making a filled and closed vacuum pak
FR2703023A1 (en) * 1993-03-25 1994-09-30 Grace Sa Method for packaging any products in containers such as, for example, trays, and machine including application of this method
ES2149071A1 (en) * 1997-08-01 2000-10-16 Munoz Fernandez Francisco Machine for wrapping food products, preferably powder products
NL1007594C2 (en) * 1997-11-20 1999-05-26 Borgesius Holding Bv Packaging system for solid foodstuffs, e.g. filled bread rolls

Also Published As

Publication number Publication date
FR2497492A1 (en) 1982-07-09
FR2497492B1 (en) 1986-03-28

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