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EP0766759B1 - Procede et dispositif pour vider un recipient rempli d'une pate tixotrope - Google Patents

Procede et dispositif pour vider un recipient rempli d'une pate tixotrope Download PDF

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Publication number
EP0766759B1
EP0766759B1 EP95918560A EP95918560A EP0766759B1 EP 0766759 B1 EP0766759 B1 EP 0766759B1 EP 95918560 A EP95918560 A EP 95918560A EP 95918560 A EP95918560 A EP 95918560A EP 0766759 B1 EP0766759 B1 EP 0766759B1
Authority
EP
European Patent Office
Prior art keywords
bag
paste
container
opening
removal unit
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
EP95918560A
Other languages
German (de)
English (en)
Other versions
EP0766759A1 (fr
Inventor
Günther Amberg
Wolfgang Huber
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.)
Ecolab GmbH and Co OHG
Original Assignee
Henkel Ecolab GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henkel Ecolab GmbH and Co KG filed Critical Henkel Ecolab GmbH and Co KG
Publication of EP0766759A1 publication Critical patent/EP0766759A1/fr
Application granted granted Critical
Publication of EP0766759B1 publication Critical patent/EP0766759B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/02—Devices for adding soap or other washing agents
    • D06F39/022—Devices for adding soap or other washing agents in a liquid state

Definitions

  • the invention is directed to a method for emptying a paste filled in essentially fully compressible container, in which at one end of the Starting container, a compressive force is applied to the container from the outside, thereby Gravity is exerted on the paste, and the one container wall until it comes into contact with the opposite container wall is moved towards this, so that the paste under Squeezing the container towards and through an opening of the container conveyed into a connected delivery line leading to a mixing container becomes.
  • the invention is directed to a device for removal and in particular for Dosing paste from an opening provided with a flexible, preferably as Disposable bag trained container, the device a base frame and one on one End of the container, starting by compressing the container, a compressive force the container and thus shear forces on the paste exerting device.
  • Paste-like, essentially water-free detergents are mainly used in commercial laundries. Examples of such pastes are described in DE 38 26 110 A1 and DE 37 19 906 A1. The advantages lie in the high washing power due to the high concentration of detergent components compared to powder Detergents, as washing-inactive, only for conditioning the detergent Additives are not required here.
  • Removal methods and devices for detergent pastes are, among others, in the DE 37 19 906 A1, DE 38 26 110 A1 and the German utility model G 93 14 591 described.
  • a barrel provided.
  • a plate that moves in the barrel and closes close to the barrel walls also called a follower plate, exerts pressure on the paste and enables it Delivery via a simple pipeline with a pump (DE 37 19 906 Al and DE 38 26 110 A1).
  • the removal process is suitable for pastes with a viscosity of around 75,000 to 90,000 mPa s.
  • a generic method and a generic device for almost complete emptying of flexible disposable containers filled with fluids are from DE 42 18 297 Al known.
  • the relatively flat wedge-shaped cross section carries one Outlet opening on its top. To empty it, it is placed between two plates and the outlet opening is connected to a pipeline. Using a printing cylinder the plates are moved against each other and the fluid contained in the container pushed out.
  • the invention has for its object a way to almost complete Empty small inexpensive containers to develop without the operator comes into direct contact with the product.
  • the above is said Packaging problem can be solved economically. It is also desirable to have a Implementation of the procedure with a relatively small, in the purchase and in the operation to enable inexpensive device.
  • this object is achieved according to the invention solved in that the compressive force is applied to a limited area of the container and on the opening is closed and that the paste is thixotropic and a detergent, as well as in the
  • the feed line is metered to the mixing tank by means of a metering pump and there with incoming water is mixed.
  • the method is not only suitable for emptying the container, but also becomes Dosing of the thixotropic paste used. Therefore it is suggested that one at the same time with emptying, dosing the paste, especially in a mixing container for mixing with water. After mixing the detergent paste you get one concentrated solution that is used as a base liquor in commercial laundries can.
  • the shear forces can be applied to the paste and afterwards or at the same time the container walls are pressed together.
  • one with Slotted plate can be used, with the flexible container through the slots is drawn starting from the end opposite the opening.
  • Other means too are possible that are suitable, at the same time sufficiently strong shear forces and compressive forces to exercise towards the opening.
  • a vertically standing plate can be pushed over the container or a bag-like container like a tube be rolled up, starting from the end opposite the opening. It is on everyone Case always ensure that on the one hand a sufficient reduction in viscosity and on the other hand an essentially complete emptying is achieved.
  • container material there is no restriction on the choice of container material. It just has to be guaranteed be that the flexibility is sufficient to be able to compress the container walls.
  • the container be made of polyethylene.
  • Such a Container is inexpensive, very flexible, and the material can be used as a raw material after emptying can be recycled for other polyethylene parts. A necessary cleaning is open easily done by slitting the bag and washing it separately or washed together with textiles. An additional advantage lies in the complete Recycling of detergent paste.
  • the invention also relates to a device according to the preamble of claim 3. This is preferred Device for removing and dosing used in commercial laundries highly viscous detergent pastes provided and designed accordingly.
  • the above task is accomplished solved according to the invention in that the paste is a thixotropic detergent and the Means movable towards the opening for compressing the Has bag on a limited area, so that shear forces at the same time at this point act on the paste and the paste is conveyed towards the opening.
  • a non-motor-driven roller is preferred, because problems with that Drive and control are therefore excluded. Accordingly, one becomes Inclusion of the bag provided inclined plane with a connection to the opening of the Bag in the lower area of the plane and a freely movable roller with Squeezing the bag walls of sufficient width and weight proposed.
  • the roller squeezes the paste in the direction of the bag opening and simultaneously strokes the emptied one Bags smooth, so that even small residues are transported to the bag opening.
  • a minimum weight of the roller typically about 20 to 25 kg, in use Containers are necessary on the one hand so that sufficiently large weight forces Liquify the paste to be applied, and secondly, to keep the roll over prevent the filled part of the bag.
  • the width of the roller corresponds at least to the width of the Bag.
  • the great advantage of the free-running roller is that it always does exactly that exerts the required pressure and the desired shear forces and at the same time with the Desired emptying rate, especially when using those described in more detail below Dosing pump, adjusted speed moves over the bag without being complicated and vulnerable regulation and control devices are required.
  • the Removal device on a delivery line for the paste. It is about one Inlet opening connectable to the bag. With a detachable but sealing connecting element of the inlet opening which can be connected to the opening of the bag the delivery line is a sealing connection of the container to the removal device even with relatively high internal pressures in the bag during the Squeezing the bag ensured.
  • a Undercut on the opening neck of the bag and one on the removal device attachable and insertable into the undercut plate proposed.
  • slipping of the bag during the removal process is safe and easily prevented when mandrels on the opposite of the inlet opening End of the removal device are arranged. That of opening the opposite end of the bag usually has one sufficient wide weld seam in which the mandrels can engage and thus the Secure the bag in the removal device, for example on the inclined plane.
  • the weld seam mentioned is located on the paste filled with bags lying on a support surface of the removal device at a distance to this area, which corresponds to about half the bag thickness. Short however, after the beginning of the removal of the bag contents, the weld seam is located directly on the contact surface. Trouble-free intervention by the Spikes into the weld and secure fixation of the pouch during of the entire removal process, in which the distance between the weld seam to the contact surface is gradually reduced by a distance to Support surface of the removal device, for example to the inclined plane, and in Area of the end opposite the inlet opening, with a ensures that the end of the bag is filled with one or more thorns, which with increasing emptying of the bag towards the Contact surface is movable. In a particularly simple and effective Execution is the support plate over springs on the support surface for the Bag attached.
  • Embodiment of the invention provided a pump in the delivery line, the one with the contact surface, for example the inclined plane, or with the Base frame is firmly connected. Is the bearing surface as one opposite part of the base frame designed so it is for reduction the weight of the moving parts advantageous when the pump is on the base frame and is not attached to the support surface.
  • the pump sucks the Paste from the area of the bag opening and the above means to compress the bag, for example push the roller the paste while liquefying from the rear of the Bag forward to the bag opening.
  • means for maintaining a distance between the lower and the upper bag wall in the area of the inlet opening the delivery line proposed, so that even when not optimally on each other coordinated mode of operation of the means for compressing with the Pump the upper bag wall is not sucked into the lower bag wall and thus the emptying or dosing is interrupted.
  • a spacer automatically presses into the bag opening when the bag is inserted into the removal device.
  • Pumps can be used. As an example Peristaltic pumps and gear pumps called. However, the pump is preferred as Screw pump, in particular designed as an eccentric screw pump.
  • skewing is particularly advantageous in the same work step Placed in their starting position.
  • the inventors therefore continue to strike before that the device means for pivoting the inclined plane in the Desired inclination that coincides with the movement of the mandrels and the release of the roller can be actuated.
  • a dosing pump for Example the screw pump already mentioned is provided, it will advantageously attached directly to or below the inclined plane. A Clogging of the delivery line due to too long delivery routes is due to this Avoided way.
  • the pump is not on the inclined plane, but on the non-moving one Base frame attached to keep the total weight of the inclined plane low hold.
  • the inlet opening of the delivery line if necessary together with the connected pump, movable in relation to the Support area is designed and thus by the expansion of the bag walls caused movement of the bag opening can follow.
  • the pump with the connected delivery line in one is freely pivotable to a certain extent.
  • a spring can also be provided be the inlet opening of the delivery line into the desired one Direction presses.
  • the problem may arise be solved by the inlet opening flexible, for example as Hose, is formed.
  • the Bracket for the roller designed as an open box. When entering the spike in the weld seam of the bag rolls the roller out of the box onto the end of the bag in its intended position.
  • the removal device has one another container in which the delivery line for the paste and a Water inlet ends. This is where the paste comes in while water is being added mixed with water to make a base solution that can be easily washed in the washing machine the laundry can be pumped.
  • the usual in the prior art Master liquor container is no longer necessary.
  • a conductivity sensor connected to the outlet of the other container be provided, which is connected to a display device.
  • the Conductivity sensor measures the concentration of the aqueous solution and gives when the bag is completely empty, if only water from the Mixing container flows, a signal to the display device, for example a horn and / or an indicator lamp.
  • a paste dispenser shown in FIG. 1 is a filled with detergent paste, made of polyethylene existing bag 2 with a connected to a conveyor line 3 Opening 4.
  • the paste dispenser has a rigid base frame 12, relative to which individual parts, for example the inclined plane 1, are movable can be, as will be explained in more detail below.
  • An eccentric screw pump 5 serving as a metering pump sucks out the paste the bag 2 and feeds them into a mixing container 6.
  • the metering pump 5 can be attached to the inclined plane 1.
  • the metering pump 5 ' is preferably on the base frame 12 the paste dispenser mounted to the weight of the inclined level 1 low to keep. This variant is shown in dashed lines in FIG. The In this case, the delivery line is designated 3 '.
  • the paste is in the mixing container 6 with another 7 leading to Water is mixed into a base liquor, which is pumped by a second pump 8 transported to the laundry washing machine, not shown becomes.
  • the concentration of the base liquor is checked with a conductivity sensor 13 monitors.
  • the conductivity sensor 13 serves together with the display device 14 in the first Line as a vacancy indicator for bag 2, but also for displaying Disorders.
  • FIG. 2 shows a section through the area of the inlet of the Delivery line 3 or 3 ', which is inserted into the opening 4 of the bag 2 is.
  • the flexible, adapted to the delivery line 3 opening 4 of the Bag 2 ensures a tight and secure connection.
  • Inlet 3 has one directed towards the end of the bag, ie to the right in FIG. 2 Opening 15 and protrudes into bag 2 to close of the inlet 3 through the upper bag wall 10 even with a high pumping speed the dosing pump 5, 5 'to prevent with certainty.
  • Inlet 3 thus forms a spacer to maintain sufficient Outlet cross section.
  • a plate 16 is used to insert the bag 2 into the paste dispenser used, which has a recess open on one side.
  • the opening nozzle 4 is inserted into this recess, so that the plate 16 in an undercut of the opening 4 is clamped. Then it will be the plate 16 attached to the bag 2 is attached to the inclined plane, such as it can be seen from Figure 2.
  • the opening nozzle 4 also has the strong mechanical stress on the bag by the roller 9 and Suction pressure of the metering pump 5, 5 'a firm and secure hold on the inclined plane.
  • the plate 16 is together with the Opening nozzle 4 of the bag 2 and the inlet of the delivery line 3, 3 ' movable along the inclined plane 1 (to the left in FIG. 2) in order to, like Has already been carried out above, the expansion of the bag 2 due to compensate for the mechanical stress.
  • the weld seam at the opposite end of the bag becomes one of two existing stacking plate 19 inserted.
  • the Lid 17 can be folded down.
  • the roller 9 rolls through the sheet 20 and the lid walls formed open box in their out ' gear position and further down the inclined plane, the thixotropic paste that liquefies at this point and presses it at the same time towards the bag opening.
  • the mandrels 18 drill at corresponding recesses of the support plate 19 in the weld of Bag 2.
  • a compression spring 21 provided below the base plate 19 provides the necessary back pressure.
  • FIGS. 5 and 6 This state of the paste metering device is illustrated in FIGS. 5 and 6.
  • FIGS. 5 and 6 have the same reference numerals the same meaning.
  • the support plate 19 is above the inclined level 1 attached, but can be moved towards this. So that the platen 19 follows the movement of the weld and the Bag walls in the direction of the inclined plane when passing the roller 9.
  • FIG. 7 shows schematically the rotary actuator before inserting the filled with paste Bag.
  • the inclined level 1 is on the left Spars of the base frame 12 fastened via a swivel joint, which is shown in FIG is indicated by an "x" or "+”.
  • On the right side is the Level 1 on base frame 12.
  • a swing arm 22 with a rigidly so connected hand lever 23 is rotatable both on the inclined plane 1 and also attached to a strut 24, which in turn is rotatable with the Base frame 12 is connected.
  • a gas pressure spring 25 is provided. It enables one the inclined plane slowly descends into the working position after the top dead center has been exceeded.
  • the quarter turn actuator can also be operated pneumatically. Of the Additional effort is minimal as a compressed air source in most Laundries are available.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Detergent Compositions (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (19)

  1. Procédé de vidange d'un récipient (2), rempli de pâte, essentiellement entièrement comprimable, dans lequel est appliquée de l'extérieur, en commençant par une extrémité du récipient (2), une force de pression sur le récipient, afin d'exercer des forces de cisaillement sur la pâte, et l'une des parois du récipient (10) étant déplacée jusqu'à s'apposer sur la paroi opposée du récipient (11), de manière que la pâte sous la pression du récipient (2) soit poussée en direction d'un ouverture (4) du récipient (2) et, à travers elle, dans une canalisation de transfert (3, 3') jointe, conduisant à un récipient de mélange (6),
    caractérisé en ce que
    la force de pression est exercée sur une surface limitée du récipient (2) et se déplace en direction de l'ouverture (4) et en ce que la pâte est thixotrope et est un produit détergent, et en ce qu'elle est introduite de façon dosée dans le récipient de mélange (6) par la canalisation de transfert (3, 3') au moyen d'une pompe de dosage (5, 5') et en ce qu'elle est mélangée avec de l'eau courante dans un récipient de mélange.
  2. Procédé selon la revendication 1,
    caractérisé en ce qu'
    au moyen d'un cylindre (9) on exerce simultanément des forces de cisaillement sur la pâte et de pression sur la pâte en direction de l'ouverture (4).
  3. Appareil de vidange et en particulier de dosage de pâte constitué d'un récipient (2) formé en sachets flexibles munis d'une ouverture (4), de préférence en sachets jetables, l'appareil présentant une ossature de base (12) et un dispositif (9) exerçant en commençant par une extrémité du récipient (2), par pression du récipient, une force de pression sur le récipient, et ainsi des forces de cisaillement sur la pâte,
    caractérisé en ce que
    la pâte est un produit détergent thixotrope et en ce que le dispositif présente des organes déplaçables en direction de l'ouverture (4) pour presser le sachet (2) sur une surface limitée, si bien qu'en cet endroit simultanément des forces de cisaillement s'exercent sur la pâte et la pâte est poussée en direction de l'ouverture (4).
  4. Appareil de vidange selon la revendication 3,
    caractérisé en ce que
    le dispositif (9) exerçant les forces de cisaillement sur la pâte est un cylindre déplaçable en direction de l'ouverture (4) du sachet (2) et pressant simultanément les parois du récipient.
  5. Appareil de vidange selon la revendication 4,
    caractérisé par un plan incliné (1) prévu pour recevoir le sachet (2) avec une connexion à l'ouverture (4) du récipient (2) dans la partie inférieure du plan (1) et un cylindre (9) se déplaçant librement avec une largeur et un poids suffisants pour presser les parois du sachet (10, 11).
  6. Appareil de vidange selon l'une des revendications 3 à 5, avec une canalisation de transfert (3, 3') pour la pâte, qui peut être connecté au sachet (2) par une ouverture d'entrée (15),
    caractérisé par
    un élément de jonction amovible de l'ouverture d'entrée de la canalisation de transfert (3, 3') qui peut être relié de manière étanche à l'ouverture (4) du sachet (2).
  7. Appareil de vidange selon l'une des revendications précédentes,
    caractérisé par
    une fente arrière sur le tuyau d'ouverture (4) du sachet (2) et une plaque (16) pouvant être fixée sur l'appareil de vidange et pouvant s'insérer dans la fente arrière.
  8. Appareil de vidange selon l'une des revendications précédentes,
    caractérisé par
    des goujons (18) disposés à l'extrémité de l'appareil de vidange opposé à l'ouverture (4) afin de fixer le sachet (2) dans l'appareil de vidange.
  9. Appareil de vidange selon la revendication 8,
    caractérisé par
    une plaque de chargement (19) située à un certain intervalle par rapport à la surface d'appui (1) de l'appareil de vidange et dans la zone de l'extrémité opposée à l'ouverture (4), munie d'un ou plusieurs goujons (18) pour l'extrémité du sachet, qui est déplaçable lorsque le sachet (2) se vide en direction de la surface d'appui (1).
  10. Appareil de vidange selon la revendication 9,
    caractérisé en ce que
    la surface de chargement (19) est fixée par des ressorts (21) à la surface d'appui pour le sachet (2).
  11. Appareil de vidange selon l'une des revendications précédentes,
    caractérisé par
    une pompe (5, 5') dans la canalisation de transfert (3, 3') solidement fixé à la surface d'appui (1) ou à l'ossature de base (12).
  12. Appareil de vidange selon la revendication 11,
    caractérisé en ce que la pompe est formée en pompe à vis sans fin, en particulier en pompe à vis sans fin excentrée (5, 5').
  13. Appareil de vidage selon l'une des revendications précédentes,
    caractérisé par
    des moyens permettant de maintenir une intervalle entre la paroi inférieure et la paroi supérieure du sachet (1, 10) dans la zone de l'ouverture d'entrée (15) de la canalisation de transfert (3, 3').
  14. Appareil de vidange selon l'une des revendications 3 à 13, dans lequel la surface d'appui pour le sachet est formée en plan incliné (1),
    caractérisé par
    un dispositif pour déplacer les goujons (18) en direction de la plaque de chargement (19) pour l'extrémité du sachet avec une fixation pour le cylindre (9), qui permet de libérer le cylindre (9) lors du déplacement des goujons (18) dans la direction de la plaque de chargement (19).
  15. Appareil de vidange selon la revendication 14,
    caractérisé en ce que
    le dispositif présente des organes (22, 23, 24) pour faire basculer le plan incliné (1) dans l'orientation désirée, qui peuvent être actionnés en même temps que le déplacement des goujons (18) et la libération du cylindre (9).
  16. Appareil de vidange selon l'une des revendications précédentes,
    caractérisé en ce que
    la pompe (5, 5') est fixée au châssis de base (12).
  17. Appareil de vidange selon l'une des revendications 6 à 7,
    caractérisé en ce que
    l'ouverture d'entrée (15) de la canalisation de transfert (3, 3') est disposée, le cas échéant avec la pompe jointe (5, 5') de façon mobile vis-à-vis de la surface d'appui (1).
  18. Appareil de vidange selon l'une des revendications 14 à 17,
    caractérisé en ce que
    la fixation pour le cylindre (9) est en forme de châssis ouvert (17, 20).
  19. Appareil de vidange selon l'une des revendications précédentes, dans lequel la canalisation de transfert (3, 3') pour la pâte débouche dans un récipient de mélange (6),
    caractérisé par
    une arrivée d'eau (7) dans le récipient de mélange (6) et un capteur de conductivité (13), connecté à une sortie de récipient (6), et qui est relié à un dispositif d'affichage (14).
EP95918560A 1994-04-27 1995-04-18 Procede et dispositif pour vider un recipient rempli d'une pate tixotrope Expired - Lifetime EP0766759B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4414708A DE4414708A1 (de) 1994-04-27 1994-04-27 Verfahren und Vorrichtung zum Entleeren eines mit einer thixotropen Paste gefüllten Behälters
DE4414708 1994-04-27
PCT/EP1995/001434 WO1995029282A1 (fr) 1994-04-27 1995-04-18 Procede et dispositif pour vider un recipient rempli d'une pate tixotrope

Publications (2)

Publication Number Publication Date
EP0766759A1 EP0766759A1 (fr) 1997-04-09
EP0766759B1 true EP0766759B1 (fr) 1999-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95918560A Expired - Lifetime EP0766759B1 (fr) 1994-04-27 1995-04-18 Procede et dispositif pour vider un recipient rempli d'une pate tixotrope

Country Status (10)

Country Link
US (1) US5765724A (fr)
EP (1) EP0766759B1 (fr)
AT (1) ATE182931T1 (fr)
DE (2) DE4414708A1 (fr)
DK (1) DK0766759T3 (fr)
ES (1) ES2135731T3 (fr)
FI (1) FI964269A7 (fr)
NO (1) NO302377B1 (fr)
SK (1) SK136096A3 (fr)
WO (1) WO1995029282A1 (fr)

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DE19636035A1 (de) 1996-09-05 1998-03-12 Henkel Ecolab Gmbh & Co Ohg Pastenförmiges Wasch- und Reinigungsmittel
DE19641746C2 (de) * 1996-10-10 1999-04-01 Henkel Ecolab Gmbh & Co Ohg Pastenspender
DE19641750A1 (de) 1996-10-10 1998-04-23 Henkel Ecolab Gmbh & Co Ohg Topf mit flexiblem Vorratsgebinde und Folgeplatte
DE19703364A1 (de) 1997-01-30 1998-08-06 Henkel Ecolab Gmbh & Co Ohg Pastenförmiges Wasch- und Reinigungsmittel
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DE19857687A1 (de) 1998-12-15 2000-06-21 Henkel Ecolab Gmbh & Co Ohg Pastenförmiges Waschmittel
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DE59506536D1 (de) 1999-09-09
DK0766759T3 (da) 2000-02-07
WO1995029282A1 (fr) 1995-11-02
NO302377B1 (no) 1998-02-23
DE4414708A1 (de) 1995-11-02
FI964269A0 (fi) 1996-10-23
ES2135731T3 (es) 1999-11-01
SK136096A3 (en) 1997-05-07
FI964269L (fi) 1996-10-23
NO964286L (no) 1996-10-09
US5765724A (en) 1998-06-16
FI964269A7 (fi) 1996-10-23
ATE182931T1 (de) 1999-08-15
NO964286D0 (no) 1996-10-09
EP0766759A1 (fr) 1997-04-09

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