EP0295203B1 - Verfahren zum Verpacken eines Produkts und Vorrichtung zur Ausübung des Verfahrens - Google Patents

Verfahren zum Verpacken eines Produkts und Vorrichtung zur Ausübung des Verfahrens Download PDF

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Publication number
EP0295203B1
EP0295203B1 EP88810312A EP88810312A EP0295203B1 EP 0295203 B1 EP0295203 B1 EP 0295203B1 EP 88810312 A EP88810312 A EP 88810312A EP 88810312 A EP88810312 A EP 88810312A EP 0295203 B1 EP0295203 B1 EP 0295203B1
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EP
European Patent Office
Prior art keywords
product
folds
flap
lateral folds
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.)
Expired - Lifetime
Application number
EP88810312A
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English (en)
French (fr)
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EP0295203A1 (de
Inventor
René Delacretaz
Serge Schor
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Sapal SA
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Sapal SA
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Publication of EP0295203A1 publication Critical patent/EP0295203A1/de
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Publication of EP0295203B1 publication Critical patent/EP0295203B1/de
Anticipated expiration legal-status Critical
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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 continuously on a linear conveyor , we position a sheet of rectangular heat-sealable packaging material on the path of this product, we simultaneously drive the product and the paper 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, this coated product is then introduced into a housing of a rotary turning device which advances intermittently, 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.
  • a product in particular a food product, such as for example a chocolate bar of substantially rectangular shape
  • 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
  • this device comprising a linear conveyor for bringing the products to be continuously packaged and a device for positioning a sheet of substantially rectangular heat-sealable packaging material on the path of this product, 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 of unequal length respectively adjacent to the large faces of this product, a rotary turning device which advances intermittently 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 pro duit, which has for effect of forming a flap disposed substantially in the extension of the large underside of this product.
  • a machine of this type is described in US Pat. No. 4,648,236 and comprises a turning device comprising members for taking up rectangular flat products with wrapping paper folded around two sides of these products and for turning them over. 180 ° and to seal the packaging during the inversion.
  • This machine is not suitable for packaging chocolate bars because of the requirements which are specific to these products.
  • 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 lateral folds and said flap are formed by means of a traditional folding box which is one of the fixed stations of the rotary turning device, in that that the partially wrapped product is extracted after it has been turned over, the turning device having rotated 180 °, in that the lateral folds are sealed in a position substantially perpendicular to the large faces of the product by a pressing element and an element support, in that the said flap is folded and the lateral folds on the underside of the product which moves continuously at the outlet of the turning device, this face being disposed above the product as a result of said turning, and in that this flap is sealed against said face lower.
  • 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 by exerting pressure on the folds lateral 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 guiding element.
  • the packaging device is characterized in that it comprises a traditional folding box for forming the lateral folds and said flap, this box being one of the fixed stations of the turning device, means for extracting the product partially wrapped, after being turned over, means for sealing the lateral folds in a position substantially perpendicular to the large faces of the product by a pressing element and a support element, means for bringing the product into abutment in at least one station arranged to fold said flap and the side folds on the underside of the product, and to glue this flap on the underside of the product, this face being disposed above the product as a result of said inversion.
  • 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 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 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.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (9)

1. Verfahren zum Verpacken eines Produkts, insbesondere eines Lebensmittels, wie z.B. eine Tafel Schokolade von etwa rechteckiger Form, in einer versiegelten Packung, bei welchem man den Artikel kontinuierlich auf einer geradlinigen Transporteinrichtung zuführt, ein rechteckiges Blatt eines heißsiegelbaren Verpackungsmaterials in die Transportbahn des Produkts einbringt, gleichzeitig das Produkt und das Papier auf der geradlinigen Transporteinrichtung weiterbewegt, indem man das Blatt so um das Produkt biegt, daß sich zwei Klappen mit ungleichen Längen bilden, die jeweils an den großen Flächen des Produkts anliegen; anschließend bringt man das so eingewickelte Produkt in eine Aussparung einer rotierenden Wendevorrichtung, welche sich intermittierend bewegt, man siegelt die Klappen entlang einer Längsseite des Produkts aufeinander, wobei sich eine im wesentlichen in der Verlängerung der großen Unterseite des Produkts liegende Umschlagklappe bildet, dadurch gekennzeichnet, daß man die seitlichen Falze und die Umschlagklappe mittels einer herkömmlichen Falzeinrichtung formt, die eine der ortsfesten Stationen der rotierenden Wendevorrichtung ist, daß man das teilweise verpackte Produkt nach dem Wenden herausnimmt, wobei die Wendevorrichtung sich um 180° gedreht hat, daß man die seitlichen Falze durch ein Preßelement (23) und ein Unterlageelement (24) in einer zu den grossen Flächen des Produkts etwa senkrechten Stellung versiegelt, daß man die Klappe und die seitlichen Falze zur Unterseite des Produkts hinbiegt, wobei sich letztere fortlaufend zum Ausgang der Wendevorrichtung hinbewegt und diese Seite sich infolge des Wendens nun über dem Produkt befindet, und daß man die Klappe an die Unterseite siegelt.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man zuerst die seitlichen Falze umbiegt und dann die Klappe über die seitlichen Falze biegt.
3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man zuerst die Klappe umbiegt und dann die seitlichen Falze über die Klappe biegt, und daß man um das Produkt herum eine bedruckte Banderole anbringt, wobei diese Banderole aus einem um das Produkt gewickelten rechteckigen Blatt besteht, so daß sich eine an ihren Enden offene Manschette bildet, und daß zwei Ränder dieses Blattes aufeinander liegen.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man die seitlichen Falze siegelt, indem man das heißsiegelbare Verpackungsmaterial mittels zweier Heizbänder vorwärmt, die so angeordnet sind, daß sie sich parallel zu dem auf der geradlinigen Transporteinrichtung abgelegten Produkt vorwärtsbewegen, und indem man dann auf die Falze aus vorgewärmtem heißsiegelbarem Werkstoff, mittels gekühlter Anpreßrollen einen Druck ausübt, wobei man die Falze durch mindestens ein Unterlage- und Führungselement in einer zu den großen Flächen des Produkts etwa senkrechten Stellung hält.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß man die seitlichen Falze mittels des Unterlage- und Führungselements festhält, während sich dieses Element parallel und mit der gleichen Geschwindigkeit wie das Produkt weiterbewegt, wobei dieses Element zwischen den zwei Falzen und über der großen Oberseite des Produkts angeordnet ist.
6. Vorrichtung zum Verpacken eines Produkts, insbesondere eines Nahrungsmittels, wie etwa eine Tafel Schokolade von etwa rechteckiger Form, in eine versiegelte Verpackung, wobei die Vorrichtung eine geradlinige Transporteinrichtung (10) aufweist, um die zu verpackenden Produkte (11) kontinuierlich zuzuführen, und eine Vorrichtung (12), um ein rechteckiges Blatt (13) eines heißsiegelbaren Verpackungsmaterials in die Transportbahn dieses Produkts einzubringen, sowie Einrichtungen, um gleichzeitig das Produkt und das Papier auf der geradlinigen Transporteinrichtung weiterzubewegen, indem man das Blatt so um das Produkt biegt, daß sich zwei Klappen (14, 15) mit ungleichen Längen bilden, die jeweils an den großen Flächen des Produkts anliegen, und eine rotierende Wendevorrichtung (16), welche sich intermittierend bewegt und die mindestens einen Ablageraum (17) zur Aufnahme eines derart umwickelten Produkts aufweist, sowie Einrichtungen (18, 19), um die Klappen entlang eines Längsrandes des Produkts aufeinander zu siegeln, wodurch sich eine im wesentlichen in der Verlängerung der großen Unterseite des Produkts liegende Umschlagklappe (21) bildet, dadurch gekennzeichnet, daß sie eine herkömmliche Falzeinrichtung (20) zum Formen der seitlichen Falze (9) und der Umschlagklappe aufweist, wobei diese Einrichtung eine der ortsfesten Stationen der Wendevorrichtung ist, sowie Einrichtungen, un das teilweise verpackte Produkt nach seinem Wenden herauszunehmen und Einrichtungen (22, 23) zum Siegeln der seitlichen Falze in einer zu den großen Flächen des Produkts etwa senkrechten Stellung, durch ein Preßelement (23) und ein Unterlageelement (24), und Einrichtungen, um das Produkt an mindestens einer Station anzuhalten, die dazu dient, die Klappe und die seitlichen Falze auf die Unterseite des Produkts zu biegen und um diese Klappe auf die Unterseite (43) des Produkts zu kleben, wobei sich diese Seite infolge des Wendens über dem Produkt befindet.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Einrichtungen zum Siegeln der seitlichen Falze zwei zu beiden Seiten des Produkts angeordnete Heizbänder (22) aufweisen, des weiteren Einrichtungen, um diese Bänder parallel zu den auf der geradlinigen Transporteinrichtung abgelegten Produkten vorwärtszubewegen, und mindestens zwei gekühlte Preßelemente (23), um auf die seitlichen Falze aus vorgewärmtem heißsiegelbarem Verpakkungsmaterial einen Druck auszuüben, wobei man diese seitlichen Falze durch mindestens ein Unterlage- und Führungselement in einer zu den großen Flächen des Produkts etwa senkrechten Stellung hält.
8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Unterlage- und Führungselement aus einer Platte (24) besteht, montiert an eine Transportkette (25), die dazu dient, diese Platte parallel zum Produkt und in der selben Geschwindigkeit zu bewegen, wobei diese Platte in den abmessungen und in der Form so ausgeführt ist, daß die sich zwischen die seitlichen, etwa vertikal stehenden Falze einführen läßt und dabei den seitlichen Falzen Unterlagen bietet, wenn sie dem Druck der Preßelemente ausgesetzt sind.
9. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Station, welche zum Umbiegen der Klappe dient, eine Hebevorrichtung (38) aufweist, um das Produkt anzuheben, sowie seitliche Falzeinrichtungen (44), um die seitlichen Falze herunterzuklappen, und bewegliche Falzanschläge (39,42) zum Umbiegen der Klappe.
EP88810312A 1987-05-12 1988-05-11 Verfahren zum Verpacken eines Produkts und Vorrichtung zur Ausübung des Verfahrens Expired - Lifetime EP0295203B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706760A FR2615166B1 (fr) 1987-05-12 1987-05-12 Procede de conditionnement d'un produit et dispositif pour la mise en oeuvre de ce procede
FR8706760 1987-05-12

Publications (2)

Publication Number Publication Date
EP0295203A1 EP0295203A1 (de) 1988-12-14
EP0295203B1 true EP0295203B1 (de) 1991-12-11

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EP88810312A Expired - Lifetime EP0295203B1 (de) 1987-05-12 1988-05-11 Verfahren zum Verpacken eines Produkts und Vorrichtung zur Ausübung des Verfahrens

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Country Link
US (1) US4909019A (de)
EP (1) EP0295203B1 (de)
JP (1) JPS6445213A (de)
CN (1) CN88102751A (de)
DE (1) DE3866792D1 (de)
FR (1) FR2615166B1 (de)

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DE3866792D1 (de) 1992-01-23
CN88102751A (zh) 1988-11-30
FR2615166B1 (fr) 1989-08-11
EP0295203A1 (de) 1988-12-14
JPS6445213A (en) 1989-02-17
FR2615166A1 (fr) 1988-11-18
US4909019A (en) 1990-03-20

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