EP0088236B2 - Distributeur des produits liquides ou pâteux - Google Patents

Distributeur des produits liquides ou pâteux Download PDF

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Publication number
EP0088236B2
EP0088236B2 EP83101029A EP83101029A EP0088236B2 EP 0088236 B2 EP0088236 B2 EP 0088236B2 EP 83101029 A EP83101029 A EP 83101029A EP 83101029 A EP83101029 A EP 83101029A EP 0088236 B2 EP0088236 B2 EP 0088236B2
Authority
EP
European Patent Office
Prior art keywords
partition
container
check valve
pump chamber
insert
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
EP83101029A
Other languages
German (de)
English (en)
Other versions
EP0088236A1 (fr
EP0088236B1 (fr
Inventor
Joachim Czech
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.)
CZECH, JOACHIM
Original Assignee
Individual
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
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Application filed by Individual filed Critical Individual
Priority to AT83101029T priority Critical patent/ATE21503T1/de
Publication of EP0088236A1 publication Critical patent/EP0088236A1/fr
Application granted granted Critical
Publication of EP0088236B1 publication Critical patent/EP0088236B1/fr
Publication of EP0088236B2 publication Critical patent/EP0088236B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/02—Membranes or pistons acting on the contents inside the container, e.g. follower pistons
    • B05B11/028—Pistons separating the content remaining in the container from the atmospheric air to compensate underpressure inside the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1015—Piston pumps actuated without substantial movement of the nozzle in the direction of the pressure stroke
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring

Definitions

  • the invention relates to a dispenser for liquids or pasty products, of the type specified in the preamble of claim 1.
  • the first check valve at the opening in the partition between the interior of the container and the pumping chamber requires a relatively large outlay in terms of production technology. If entire check valves are manufactured and installed as a separate unit, this is complex in design, manufacture and assembly and is associated with great costs.
  • closing parts of non-return valves in particular in the form of closing flaps, are designed as components of inserts to be arranged in headers of dispensers, which have further functions, for example the formation of the pumping chamber and the formation of a conduit to the applicator, arise for the production, especially in the plastic injection molding process, complicated and expensive injection molds.
  • the dispenser for pasty products described in FIGS. 3 to 8 of EP-A-00 13 691 has a one-piece injection molded part which at the same time has the elastic flaps for the first check valve and the second check valve.
  • This unit which consists of a closing part, an elastic element and a holding element, forms a connecting tunnel which connects an output channel to a section of the pump chamber.
  • the preamble of claim 1 is based on DE-U-8025352.7.
  • This document describes a dispenser for liquids or pasty products with a container containing the respective product. At the upper end, the container is closed with a partition wall which has a plurality of openings distributed around the center. Furthermore, an applicator is provided, which is arranged in a head piece that covers the partition. The head piece, together with the partition, forms a pump chamber which is variable in volume due to external loading. Between the pump chamber and the container there is a first check valve that can only be opened in the direction of the pump chamber, and a second check valve that can only be opened in the direction of this mouth is arranged in the region of an opening of the applicator.
  • the first check valve has a closing part which, in the closed position, lies sealingly over the openings in the partition.
  • the closing part is connected via at least one spring arm to a sleeve-shaped element arranged inside the annular cover.
  • the sleeve-shaped element is used for storage on a projecting pin of the partition.
  • the partition wall also has a downwardly extending cup-shaped indentation, on the bottom of which the pin is arranged.
  • the first check valve formed by the partition, the opening provided in this opening and the closing part which is shown in DE-U-8025352.7, is characterized by a very complex structure and has the disadvantage that the closing part itself essentially has a cross section is cup-shaped.
  • the invention has for its object to provide a dispenser of the type mentioned, the first check valve is simple and economical to manufacture and has a long life with a simple structure and reliable operation.
  • the closing part of the first check valve can be produced together with a holding element and at least one elastic element connecting the closing part with the holding element as a simple component, for example using a simple injection mold, and then as an insert on the partition in the area of the opening or openings be attached.
  • a simple component for example using a simple injection mold
  • an insert on the partition in the area of the opening or openings be attached.
  • each opening in the dividing wall is followed by a suction tube which extends into the container and is open at the bottom, that the container at its lower end is connected to the walls of Bottom connected container is closed, and that in the region of the dividing wall at least one connecting path connecting the inside of the container with the environment is provided, optionally with a device preventing the contents of the container from escaping to the outside.
  • a suction tube which extends into the container and is open at the bottom
  • the container at its lower end is connected to the walls of Bottom connected container is closed
  • in the region of the dividing wall at least one connecting path connecting the inside of the container with the environment is provided, optionally with a device preventing the contents of the container from escaping to the outside.
  • the second check valve closes and a negative pressure is created in the pumping chamber, by means of which the first check valve is opened and liquid is sucked up from the interior of the container through the suction pipe or the suction pipes into the pumping chamber. Since the area of the interior of the container above the liquid is connected to the environment via a connecting path, for example a narrow connecting channel, the pressure of the environment prevails there.
  • the container has an opening at its lower end and is closed there with a tight piston sliding on the inner wall of the container.
  • the pressure of the environment acts from the outside on the piston sliding on the inner wall of the container and moreover on the contents of the container. If the volume of the pump chamber is reduced by external actuation, the pasty material located therein is pressed outwards by the second check valve and the applicator mouth. The first check valve is closed. If the volume of the pumping chamber is then increased again, the second check valve closes and a negative pressure is created in the pumping chamber, by which the first check valve is opened. Pasty material is then pressed through the first check valve into the pumping chamber under the effect of the ambient pressure pushing on the displaceable piston from below.
  • a particularly advantageous embodiment of the dispenser according to the invention which can be used both for liquid products and for pasty products, is achieved according to the invention in that the head piece has a pump element that can be actuated from the outside and is displaceable relative to the partition wall for changing the volume of the pump chamber, on which a the restoring spring causes the restoring movement away from the partition and the applicator of the head piece has an output channel which is laterally offset to the opening or the openings of the partition.
  • the volume of the pump chamber is reduced by manually pushing the pump element inward. An increase in the volume of the pump chamber is then automatically brought about by the return spring pushing the pump element outwards.
  • a very favorable embodiment of this embodiment of the invention is provided in that an insert is arranged in the head piece, which has an upwardly and downwardly open hollow cylindrical part to form a substantially cylindrical pumping chamber and a part connecting the pumping chamber to the applicator, and in that the pump element, which can be actuated from the outside, is designed as a pump piston which is displaceably guided in the hollow cylindrical part of the insert.
  • an insert is arranged in the head piece, which has an upwardly and downwardly open hollow cylindrical part to form a substantially cylindrical pumping chamber and a part connecting the pumping chamber to the applicator, and in that the pump element, which can be actuated from the outside, is designed as a pump piston which is displaceably guided in the hollow cylindrical part of the insert.
  • the partition has a plurality of openings distributed around a center
  • the closing part is designed as an annular cover covering the openings in the closed position, which cover at least a spring arm is connected to a sleeve-shaped holding element arranged within the annular cover, and that an upwardly projecting pin is provided on the partition wall, onto which the sleeve-shaped holding element can be plugged.
  • This configuration also results in a very easy-to-produce insert insert, the closure part being designed as an annular cover which at the same time covers all the openings in the partition in the closed position.
  • the striker insert is attached to the partition by plugging onto the pin in a simple and reliable plug connection.
  • Another feature of the invention in which the pin on the partition and the sleeve placed thereon do not protrude into the pumping chamber, is given in that the partition has a downwardly extending cup-shaped indentation, on the bottom of which the pin is arranged.
  • Fig. 1 en is more suitable for liquids known donor shown.
  • the dispenser has a container 1 which is closed at its lower end by a bottom which is integrally connected to the container and which has a wide circular opening at its upper end, on the edge of which there is an upwardly projecting tubular connector 2.
  • a head piece 3 is arranged, which at its lower end has circumferential projections on the inner circumference.
  • the head piece 3 is attached to the socket 2 of the container 1.
  • the all-round projections on the inner circumference of the head piece engage in groove-shaped gaps between all-round projections on the outer circumference of the connecting piece, so that there is a form-fitting plug connection.
  • the head piece 3 has an applicator 3 'with an opening 3 ′′ provided therein.
  • An insert 4 is arranged in the head piece 3, which has a hollow cylindrical part 4' which is open at the top and bottom to form an essentially cylindrical pump chamber 5, as well as a die Pump chamber 5 with the applicator 3 'connecting part 4 ".
  • the insert 4 is installed in the head piece 3 before the head piece 4 is placed on the nozzle 2 of the container 1.
  • a pump element designed as a pump piston 7 is arranged and guided axially displaceably.
  • the piston 7 is connected to an actuating button 8 which is guided axially displaceably in a recess in the head piece 3.
  • a return spring 9 designed as a compression spring, which tries to move the button upwards and thus also the piston 7 upwards.
  • the part 4 "of the insert 4 is configured in its upper part as a tube piece which is inserted into the dispensing channel of the applicator 3 '.
  • a partition 10 is provided which has an opening 11.
  • the partition 10 is designed as a separate insert, which is fastened with its circular outer edge at the lower end of the insert 4 in a plug connection.
  • a projection running around the inner circumference of the insert 4 at the lower edge of the same engages under the outer edge of the wall insert 10 and holds it in firm connection with the insert 4.
  • the lower edge of the hollow cylindrical part 4 'of the insert 4 and the part 4 "of the insert 4 lie sealingly from above on the upper surface of the wall 10.
  • On the underside of the wall 10 there is in the region of the opening 11 a downwardly projecting connecting piece 12, in which the upper end of a nozzle extending downwards into the interior of the container 1 Saugrohes 13 is inserted.
  • the peripheral edge of the opening 11 of the partition 10 is designed as an upwardly projecting pipe socket 14.
  • the upper end face of the pipe socket 14 is provided as a contact surface for a closing part 15.
  • the closing part 15 is shaped as a circular disk which is connected in one piece to an annular holding element 17 via two spring arms 16.
  • the closing part 15 forms, together with the spring arms 16 and the retaining ring 17, a structural unit designed as a separate insert.
  • the spring arms 16 are designed as arcuate arms which run concentrically to the closing part 15 and whose ends are connected in one piece to the closing part or to the retaining ring.
  • the insert formed in this way is shown in plan view in FIG. 2.
  • the dividing wall 10 has an annular wall section running concentrically to the connecting piece 14, with a projection 18 running around the circumference and projecting inwards therein.
  • a protrusion 17 ′ running around the outer circumference is provided on the holding ring 17 of the closure part insert.
  • the retaining ring 17 is pressed against the partition 10 so that the projection 17 ′ comes to lie behind the projection 18 of the partition 10. In this way, the holding ring 17 is fastened in a form-fitting manner on the partition wall 10.
  • the upper opening of the container 1 is closed by the partition 10 and the outer walls of the insert 4.
  • a sealing ring 19 made of an elastic material, for example rubber or plastic, is arranged between the outer wall of the insert 4 and the upper end of the socket 2.
  • a flange at the upper end of the sealing ring is clamped between the projection 6 of the insert 4 and the upper end face of the connector 2.
  • the lower part of the sealing ring is designed as a wedge-shaped apron. In this way it is ensured that liquid which is inside the container 1 cannot penetrate between the outer wall of the insert 4 and the nozzle 2 to the outside.
  • an axially extending groove 20 is provided, which extends from the lower edge of the head piece 3 to the groove on the inner circumference receiving the projection 6.
  • a groove-shaped recess 21 is formed in the projection 6.
  • An insert 22 is arranged in the tubular section of part 4 "of the insert 4, at the lower end of which a closure flap 23 is integrally formed via an elastic bridge.
  • the closure flap 23 is pressed elastically against the edge of the through opening 4" 'of the insert 4 and forms with this a second check valve that controls the connection between the pump chamber 5 and the applicator 3.
  • a plug 24 can be detachably inserted into the opening 3 "of the applicator 3 '.
  • a cover cap 25 can be removed from the top of the head piece 3.
  • all parts with the exception of the metallic return spring 9 are made of plastic .
  • the cover cap 25 is first pulled off the head piece 3 by hand.
  • the sealing plug 24 is then removed by hand from the mouth 3 "of the applicator 3 '.
  • the dispenser can then be grasped by hand, for example on the head piece 3.
  • the button 8 By pressing the button 8 with a finger, it is pressed against the action of the return spring 9
  • the pump piston 7 is moved towards the partition wall 10, so that the volume of the pump chamber 5 is reduced, the closing part 15 being pressed against the end face of the connector 14, so that the first check valve is closed located in the pump chamber 5, is pressed against the flap 23 so that it is bent away from its closed position.
  • the closing part 15 is lifted up against the action of the spring arms 16 from the socket 14, so that the opening 11 in the partition 10 is opened and liquid is sucked through the suction pipe 13 into the pump chamber 5.
  • the connecting path 20, 21 the atmospheric pressure inside the container 1 comes into effect in the area above the liquid.
  • the pump piston 7 has reached its upper end position, the suction stroke is ended.
  • the closing part 15 comes to rest against the nozzle 14 and closes the opening 11. Then, by pressing the button 8 in the manner already described, the liquid in the pumping chamber 5 can be released to the outside again.
  • FIG. 3 shows an exemplary embodiment of a dispenser according to the invention which is suitable for handling pasty products.
  • 3 corresponds to the structure of the dispenser according to FIG. 1, the same reference numerals are used to designate the parts shown. A further description of these parts and their function can be waived.
  • the dispenser according to FIG. 3 differs in structure from the dispenser according to FIG. 1 in that the container 26 containing the pasty material is not closed at its lower end by a bottom wall firmly connected to the container, but is open. The lower opening of the container 26 is closed by a piston 27 sliding on the inner wall of the container. 3, the partition wall 28 is integrally connected to the container at the upper end of the container 26.
  • the head piece 3 is attached together with the insert 4 to the socket 2 of the container 2 in an analogous manner to that shown in FIG. 1.
  • the arrangement of a sealing ring between the insert 4 and the socket 2 is not necessary because the partition wall 28 is connected in one piece to the container 26, because the lower end of the insert 4 lies tightly against the top of the partition wall 28 and because the plug connection between the head piece and Socket 2 is sufficiently tight to prevent any pasty material from leaking out.
  • the partition wall 28 has two circular-arc-shaped openings 29 which are diametrically opposite one another concentrically to the central axis of the container 26.
  • the partition wall 28 has a downwardly extending cup-shaped indentation 28 ', on the bottom of which an upwardly projecting pin 30 is attached in one piece.
  • the openings 29 in the partition wall 28 extend in the flat region of the partition wall outside the upper edge of the indentation 28 '.
  • a closing part 31 designed as a flat ring. This closing part 31 is connected in one piece to a sleeve-shaped holding element 33 via two spring arms 32.
  • the closing part 31 forms, together with the spring arm 32 and the sleeve-shaped holding element 33, a structural unit which is designed as an insert and which can be produced in a simple and economical manner in a simple form by injection molding.
  • the sleeve-shaped holding element 33 is for connection to the partition 28 plugged onto the pin 30.
  • the first check valve of the dispenser according to FIG. 3 is thus formed by the closing part insert 31, 32, 33 together with the openings 29 and the cup-shaped depression 28 ′ and the pin 30. In the closed position of the first check valve, the annular closing part 31 lies closely above the openings 29 and closes them.
  • FIG. 4 shows a top view of the first check valve of the dispenser according to FIG. 3.
  • the piston 7 is moved towards the partition wall 28 by pushing the button 8 inward, so that the volume of the pumping chamber 5 is reduced.
  • Pasty material which is located in the pump chamber, is pressed through the second check valve, the flap 23 of which opens the opening 4 "', into the applicator 3" and through the mouth 3 "'.
  • the first check valve is closed , since the closing part 31 is pressed against the partition wall 28 and covers the openings 29.
  • the button 8 is released, the piston 7 is moved upwards under the action of the return spring 9, so that the volume of the pump chamber 5 is increased a suction effect, through which the second check valve closes by the flap 23 covering the opening 4 "'.
  • the ambient pressure acts from below on the piston 27 and via this on the contents of the container 26, so that under the effect of the pressure difference between the negative pressure in the pump chamber 5 and the pressure inside the container 26, the closing part 31 against the action of the spring arms 32 is lifted from the openings 29.
  • Pasty material then penetrates through the openings 29 into the pumping chamber 5, under the effect of the ambient pressure, the piston 27 is displaced upwards relative to the inner wall of the container 26: when the upward movement of the pumping piston 7 has ended and thus also the filling of the pumping chamber 5 is finished with pasty material, the closing part 31 comes back to the sealing contact via the openings 29 of the partition wall 28. Then the pasty material can be discharged from the pump chamber 5 through the applicator 3 'again in the manner already described.
  • the design of the first check valve ensures simple and economical manufacture and assembly and reliable functioning of the valve.
  • the relatively large openings 29 in the partition wall 28, which are required for pasty materials, are reliably covered by the closing part 31.
  • the dispenser according to the invention is characterized by a number of considerable advantages.
  • the simple design of the area of the partition provided with the openings makes it possible to produce the container of the dispenser particularly cost-effectively.
  • no additional surfaces to be used as sealing or mating surfaces are required, so that both the manufacturing costs of the injection mold and control or reworking costs can be eliminated in the finished dispenser.
  • the design of the cover also proves to be particularly simple, since it can be designed as a flat ring.

Landscapes

  • Closures For Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Claims (2)

1. Distributeur de produits liquides ou pâteux comportant un conteneur (26) qui renferme le produit concerné, est fermé à son extrémité supérieure par une paroi de séparation (28) présentant plusieurs ouvertures (29) réparties autour d'un point central et est muni d'une tête (3) qui recouvre la paroi de séparation, présente un applicateur (3') et forme avec la paroi de séparation une chambre de pompage (5) dont le volume peut être modifié par alimentation extérieure et qui est séparée par rapport au conteneur (26) par une première soupape anti-retour ne pouvant s'ouvrir qu'en direction de la chambre de pompage et par rapport à l'orifice (3") de l'applicateur (3') par une deuxième soupape antiretour (23) ne pouvant s'ouvrir qu'en direction de cet orifice, la première soupape anti-retour présentant une pièce de fermeture (31) qui, en position de fermeture, est placée hermétiquement sur les ouvertures (29) de la paroi de séparation et est réalisée sous forme de couverture annulaire (31) qui est reliée par l'intermédiaire d'au moins un bras à ressort (32) à un élément de blocage (33) en forme de manchon disposé à l'intérieur de la couverture annulaire et en ce que la paroi de séparation (28) comporte un tourillon (30) faisant saillie vers le haut et sur lequel peut être emboîté l'élément de blocage (33) en forme de manchon, la paroi de séparation présentant une encoche (28') en forme de cuvette s'étendant vers le bas sur le fond de laquelle est disposé le tourillon (30) et le conteneur (26) présentant à son extrémité inférieure une ouverture qui est fermée par un piston (27) coulissant hermétiquement sur la paroi intérieure du conteneur, caractérisé en ce que les ouvertures (29) de la paroi de séparation (28) s'étendent dans une zone plane à l'extérieur du bord supérieur de l'encoche (28') et en ce que la couverture annulaire (31) est réalisée sous la forme d'un anneau plat.
2. Distributeur selon la revendication 1, caractérisé en ce que chaque bras à ressort (32) est . réalisé sous la forme d'un bras arqué qui s'étend concentriquement par rapport à la pièce de fermeture (31) et est relié par l'une de ses extrémités d'un seul tenant à la pièce de fermeture (31) et par son autre extrémité d'un seul tenant à l'élément de blocage (33).
EP83101029A 1982-03-08 1983-02-03 Distributeur des produits liquides ou pâteux Expired - Lifetime EP0088236B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101029T ATE21503T1 (de) 1982-03-08 1983-02-03 Spender fuer fluessigkeiten oder pastoese produkte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US355682 1982-03-08
US06/355,682 US4485943A (en) 1982-03-08 1982-03-08 Dispenser for liquids or pasty products

Publications (3)

Publication Number Publication Date
EP0088236A1 EP0088236A1 (fr) 1983-09-14
EP0088236B1 EP0088236B1 (fr) 1986-08-20
EP0088236B2 true EP0088236B2 (fr) 1990-12-27

Family

ID=23398390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101029A Expired - Lifetime EP0088236B2 (fr) 1982-03-08 1983-02-03 Distributeur des produits liquides ou pâteux

Country Status (5)

Country Link
US (1) US4485943A (fr)
EP (1) EP0088236B2 (fr)
JP (1) JPS58171371A (fr)
AT (1) ATE21503T1 (fr)
DE (1) DE3365375D1 (fr)

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DE3530486A1 (de) * 1985-08-27 1987-03-05 Pfeiffer Erich Gmbh & Co Kg Austragvorrichtung fuer fliessfaehige medien
DE3601311A1 (de) * 1986-01-17 1987-07-23 Joachim Czech Spender fuer pastoese produkte
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Also Published As

Publication number Publication date
EP0088236A1 (fr) 1983-09-14
DE3365375D1 (en) 1986-09-25
EP0088236B1 (fr) 1986-08-20
US4485943A (en) 1984-12-04
JPS58171371A (ja) 1983-10-08
ATE21503T1 (de) 1986-09-15

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