EP0448766A2 - Séchoir malaxeur, ou dispositif pour l'usinage et le traitement de produits liquides, pâteux, humides et secs - Google Patents

Séchoir malaxeur, ou dispositif pour l'usinage et le traitement de produits liquides, pâteux, humides et secs Download PDF

Info

Publication number
EP0448766A2
EP0448766A2 EP90107482A EP90107482A EP0448766A2 EP 0448766 A2 EP0448766 A2 EP 0448766A2 EP 90107482 A EP90107482 A EP 90107482A EP 90107482 A EP90107482 A EP 90107482A EP 0448766 A2 EP0448766 A2 EP 0448766A2
Authority
EP
European Patent Office
Prior art keywords
mixing
heating jacket
container
dryer according
screw
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.)
Withdrawn
Application number
EP90107482A
Other languages
German (de)
English (en)
Other versions
EP0448766A3 (en
Inventor
Johann Dipl. Ing. Kugler
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.)
Alfred Bolz GmbH and Co KG
Original Assignee
Alfred Bolz 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 Alfred Bolz GmbH and Co KG filed Critical Alfred Bolz GmbH and Co KG
Publication of EP0448766A2 publication Critical patent/EP0448766A2/fr
Publication of EP0448766A3 publication Critical patent/EP0448766A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B7/00—Drying solid materials or objects by processes using a combination of processes not covered by a single one of groups F26B3/00 and F26B5/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/84—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers rotating at different speeds or in opposite directions about the same axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
    • F26B11/12—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices
    • F26B11/14—Machines or apparatus for drying solid materials or objects with movement which is non-progressive in stationary drums or other mainly-closed receptacles with moving stirring devices the stirring device moving in a horizontal or slightly-inclined plane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00—Heating arrangements
    • F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/09—Stirrers characterised by the mounting of the stirrers with respect to the receptacle
    • B01F27/091—Stirrers characterised by the mounting of the stirrers with respect to the receptacle with elements co-operating with receptacle wall or bottom, e.g. for scraping the receptacle wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/15—Stirrers with tubes for guiding the material

Definitions

  • the present invention relates to a mixer dryer or device for processing and processing liquid, pasty, moist and dry products under atmospheric, vacuum or pressure conditions, a mixing container consisting of a lid, middle and bottom part, which can be optionally heated is provided and a mixing screw is arranged in the interior of the mixing container rotating about the vertical container axis.
  • Mixing dryers of this type are known in order to dry liquid, pasty or moist and also dry products with high output.
  • drying devices In such mixed dryers, which have a cylindrical or cylindro-conical wall.
  • the previously known drying devices generally consisted of an internally heated mixing screw, which is enclosed by a heating medium in a closed circuit, and of heated container walls of this mixing dryer.
  • a mixing dryer in this regard is based, for example, on the applicant's own patents.
  • the mixer dryer mentioned has an excellent heating performance, but the ratio of Product volume to the heat transfer surface can still be optimized.
  • the known mixing dryers are a heated mixing screw that runs along the inner wall of the mixing container.
  • the object of the present invention is to develop mixer driers of the type mentioned at the outset in such a way that the ratio between product volume and heat transfer surface is still significantly improved.
  • the invention is characterized in that, starting from a mixing container which contains a centrally driven, heated mixing screw, this mixing screw is concentrically surrounded by at least one heatable heating jacket, which heating jacket is essentially cylindrical and is axially parallel to the axis of the mixing screw extends in the mixing container.
  • the main advantage is achieved that a further heating surface is created in the interior of the mixing dryer at a close radial distance from the heated mixing screw, which ensures excellent heat transfer to the product to be dried.
  • the inner wall of the heating jacket runs at a close radial distance from the outer contour of the heated mixing screw. This defines a conveying gap through which the mixing screw either transports the product upwards or in other applications conveys it downwards from the lid area of the container.
  • the heating jacket leaves an axial distance to the inside of the lid so that the mixing screw redirects the product conveying upwards there on the lid and the product descends radially outward on the container walls in the direction of the bottom area of the mixing dryer.
  • the product to be dried again comes into thermal contact with the heated outer wall on the one hand and with the possibly heated inner wall of the mixing container on the other hand.
  • the heating jacket preferably extends axially parallel to the longitudinal axis of the mixing screw.
  • the mixing screw itself is conical in shape and accordingly the heating jacket does not run axially parallel to the longitudinal axis of the mixing screw, but also has a conical contour.
  • a first embodiment provides that the conical contour opens upwards and the heating jacket is adapted to this contour accordingly.
  • the contour of the heating screw is wider in the bottom area than in the lid area and accordingly the heating jacket is also adapted to this contour.
  • the heating jacket is double-walled.
  • This double-walled heating jacket Forced operation of the heating medium instead of such that the heating medium enters the circulating boiler room below and is guided there along channels or guide tubes along the walls so that a constant flow of the heating medium takes place, for. B. upwards from the outer wall of the container; the heating medium is deflected at the top and is led down again on the inner wall of the container and drained to an outlet.
  • the heating medium is introduced in the upper region of this double-walled heating jacket and z. B. spirally down in the double wall of the heating jacket and is fed to an outlet there.
  • a heating medium such as water or steam or a thermal oil
  • an electric heating is provided in addition or alone.
  • Another essential feature of the present invention is that in the annular gap between the outer wall of this concentric heating jacket and the inner wall of the mixer dryer, another mixer with one or more arms is arranged, which mixer is driven in rotation and the one or more arms in the annular gap between the outer wall of the heating jacket and the inner wall of the optionally heated container wall are rotatably driven.
  • the delivery arms have a scraping or circulation effect on the product in the mixer dryer.
  • the radial inside of the cantilevers which are arranged closest to the radially outer side to the heatable heating jacket, strips off the product which settles on the outside of the concentric heating jacket and leads it away. This will Avoid caking, sticking or inadmissible adhesion of the product in this area.
  • the booms also have an additional conveying effect for medium in the axial direction of the mixing screw. It remains open whether the conveying direction is opposite to the conveying direction of the mixing screw or in the same direction as the conveying direction of the mixing screw.
  • the mixing screw is driven from below (from the bottom of the container), while the stripper arrangement is driven from the lid side of the container.
  • both arrangements are driven together concentrically to one another either on the lid side or on the bottom side of the container.
  • the boom itself still perform rotating movements and driven in rotation on the Run along the inside of the mixer dryer.
  • the mixing container consists of a lid part 1, a middle part 2 and a bottom part 3.
  • the lid part 1 can be curved, conical or flat.
  • the middle part 2 is designed as a cylinder, conically or conically.
  • Flat, conical or curved designs are selected for the base part 3.
  • Cover part 1, middle part 2 and bottom part 3 can optionally be provided with heating jackets 4.
  • a double-walled, heated conveyor drying tube 6 or heating jacket is mounted concentrically around a screw conveyor, which can also be double-walled and the product downwards or upwards promotes.
  • Another mixer 8 with one or more arms 9, 9a is installed in the mixing tank in order to achieve scraping or circulation effects on the tank walls and on the heating jacket 6.
  • This mixer can be guided with a guide bearing 10 in the container.
  • this mixer 8 can be designed as a heatable hollow body, as a result of which increased heat transfer to the product is achieved.
  • the vertical axis is either driven in the direction of arrow 11 or 12, while the agitator 8 is also driven in the direction of arrow 11 or 12. It is also provided that the upper end 13 of the mixing screw 7 is additionally mounted concentrically in the vertical axis of the agitator 8.
  • the heating jacket 6 is designed as a delivery pipe.
  • delivery pipe means that the product is conveyed upwards from the mixing screw 7 in the direction of arrow 14 from the bottom 3, the product being carried upwards in the annular gap 15 between the outer edge of the mixing screw and the delivery pipe 6. This results in excellent heat transfer between the heated mixing screw and the inner jacket of the delivery pipe 6.
  • the product is then deflected in the region 16 of the lid on the lid and sinks again in the direction of arrow 17, where it in turn comes into contact with the outer wall 18 of the heatable delivery pipe 6 and the inner wall 19 of the heated container wall of the container of the middle part 2.
  • the wipers 9, which can consist of one or more wipers 9 arranged evenly distributed around the circumference, all of which are non-rotatably connected to the vertical axis of the agitator 8.
  • the wipers 9 are preferably hollow, so that the product can pass through the hollow cross section 21, it being preferably provided in a further embodiment that the wipers 9 are also additionally heated.
  • the product By forming a free cross section 21 or a recess in the area of the wipers 9, the product can pass through there and thereby reduce the stirring resistance for the circulating agitator 8.
  • the wipers 9 still have a conveying effect in the vertical direction 17 or convey in the opposite direction.
  • the product thus also comes into excellent thermal contact with the heating medium in the outer annular gap 22 between the radial outside of the wipers 9 and the inside of the heated container wall 19.
  • a circumferential guide bearing 10 is arranged on the outside of the concentric conveyor drying tube 6, which supports the wipers 9 in their lower region.
  • FIG 2 shows schematically a cross section through the mixing screw 7 where it can be seen that the mixing screw blades 23 have a cavity 24 which is continuously flowed through by a heating medium.
  • the cavities are not shown in detail 24 of all mixing screw blades 23 connected to each other so that all of the heating medium flows through them. Likewise, the heating screw flows through the mixing screw shaft itself.
  • FIG. 3 shows a modified exemplary embodiment in comparison to FIG. 1.
  • the same parts are provided with the same reference symbols.
  • the mixing screw 7 is rotatably mounted with an upper bearing 13 centrally in the vertical shaft of the agitator 8.
  • the boom is double and consists of the boom arms 9 and 9a.
  • the heating of the arms 9, 9a is shown schematically here, the heating medium entering from the lid area via a rotation distributor 27 in the direction of the arrow 26 and flowing back into the rotation distributor 27 from the arm 9, 9a in the direction of the arrow 28.
  • the redirection takes place in the direction of arrow 29 at the lower region of this boom.
  • the mixing screw 7 consists of a concentric, rotating driven pipe 30, in the interior of which the fixed supply pipe 31 for supplying the heating medium is arranged in the interior of the mixing screw 7.
  • the inner tube 31 is not stationary, but is driven to rotate together with the mixing screw 7.
  • the mixing screw is driven by the rotary drive 32 according to FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Accessories For Mixers (AREA)
  • Drying Of Solid Materials (AREA)
EP19900107482 1990-03-28 1990-04-19 Mixer-dryer, or apparatus for working or processing liquid, pasty, moist and dry products Withdrawn EP0448766A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4009926 1990-03-28
DE4009926A DE4009926A1 (de) 1990-03-28 1990-03-28 Mischtrockner bzw. vorrichtung zum be- und verarbeiten von fluessigen, pastoesen, feuchten und trockenen produkten

Publications (2)

Publication Number Publication Date
EP0448766A2 true EP0448766A2 (fr) 1991-10-02
EP0448766A3 EP0448766A3 (en) 1992-08-19

Family

ID=6403227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900107482 Withdrawn EP0448766A3 (en) 1990-03-28 1990-04-19 Mixer-dryer, or apparatus for working or processing liquid, pasty, moist and dry products

Country Status (2)

Country Link
EP (1) EP0448766A3 (fr)
DE (1) DE4009926A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536650A1 (fr) * 1991-10-11 1993-04-14 Alb. Klein GmbH & Co. KG Procédé et dispositif pour sècher des substances humides
EP0538065A1 (fr) * 1991-10-16 1993-04-21 Masao Kanai Dispositif de séchage
ES2068776A1 (es) * 1993-10-14 1995-04-16 Talleres Landaluce S A Sistema de secado del bagazo u otros subproductos humedos.
WO1995013512A1 (fr) * 1993-11-12 1995-05-18 Edwin Eisenegger Procede de traitement thermique d'un produit solide coulant, dispositif de melange pour son application et produit obtenu selon ce procede
CN101441026B (zh) * 2008-12-28 2010-10-27 嘉兴赞宇科技有限公司 一种复合式真空干燥器
CN106382798A (zh) * 2016-08-30 2017-02-08 安徽省中阳管业有限公司 一种具有脱水功能的钢带烘干装置
IT201600083988A1 (it) * 2016-08-09 2018-02-09 Metech S R L Serbatoio di stoccaggio per resine di impregnazione
WO2020029052A1 (fr) * 2018-08-06 2020-02-13 江苏荣达利机械有限公司 Structure de guidage de matériau pour une machine de séchage à trois cylindres
CN113883850A (zh) * 2021-10-08 2022-01-04 温州天顺建筑安装工程有限公司 一种厂房建设材料干燥处理系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276970A (zh) * 2015-08-01 2016-01-27 张海娟 旋转式真空导热换热装置
CN105276971B (zh) * 2015-08-11 2018-11-02 张海娟 加热换热装置
CN105222542A (zh) * 2015-08-14 2016-01-06 张海娟 颗粒物料真空干燥机
CN105222543B (zh) * 2015-08-15 2018-11-02 张海娟 滚筒式真空干燥机

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR871961A (fr) * 1941-05-06 1942-05-23 Mélangeur-tamiseur à circuit fermé
US2367149A (en) * 1940-08-27 1945-01-09 Gulf Oil Corp Grease manufacturing apparatus
FR73808E (fr) * 1958-07-04 1960-09-12 Ruhrchemie Ag Procédé et dispositif de traitement, et en particulier le séchage de matières pulvérulentes
US3206287A (en) * 1960-05-10 1965-09-14 Crawford & Russell Inc Material treatment apparatus
US3681308A (en) * 1970-03-02 1972-08-01 Phillips Petroleum Co Stirred,scraped-surface apparatus and process for treating materials therein
US3877881A (en) * 1968-10-08 1975-04-15 Mitsubishi Heavy Ind Ltd Reactors for highly viscous materials
FR2274638A1 (fr) * 1974-04-09 1976-01-09 Hedrich Vakuumanlagen Wilhelm Procede et dispositif pour melanger, degazer ou epaissir des resines synthetiques constituees de plusieurs composants et pouvant contenir des charges
GB2072030A (en) * 1980-03-10 1981-09-30 Chemetron Process Equip Universal batch processor
GB2130699A (en) * 1982-11-19 1984-06-06 Kai Lennart Neuvonen Means for drying and/or storing welding powder or equivalent

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107005B (de) * 1956-10-12 1961-05-18 Harting Elektro W Kreditspeichereinrichtung
SE366218B (fr) * 1972-09-01 1974-04-22 E Carlsson
DE3030574A1 (de) * 1980-08-13 1982-03-11 Martin 4905 Spenge Brand Vorrichtung zum trocknen und/oder mischen von schuettguetern
DE8204313U1 (de) * 1982-02-17 1982-08-05 Horst Möller-Maschinenbau, 4980 Bünde Vorrichtung zum trocknen von gut verschiedener art, insbesondere holzabfaelle, biomassen od. dgl.
EP0281629A4 (fr) * 1986-09-16 1989-11-20 Ch Kt I Avtom Mekh Avtomobiles Installation pour le sechage conductif de materiaux en vrac.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2367149A (en) * 1940-08-27 1945-01-09 Gulf Oil Corp Grease manufacturing apparatus
FR871961A (fr) * 1941-05-06 1942-05-23 Mélangeur-tamiseur à circuit fermé
FR73808E (fr) * 1958-07-04 1960-09-12 Ruhrchemie Ag Procédé et dispositif de traitement, et en particulier le séchage de matières pulvérulentes
US3206287A (en) * 1960-05-10 1965-09-14 Crawford & Russell Inc Material treatment apparatus
US3877881A (en) * 1968-10-08 1975-04-15 Mitsubishi Heavy Ind Ltd Reactors for highly viscous materials
US3681308A (en) * 1970-03-02 1972-08-01 Phillips Petroleum Co Stirred,scraped-surface apparatus and process for treating materials therein
FR2274638A1 (fr) * 1974-04-09 1976-01-09 Hedrich Vakuumanlagen Wilhelm Procede et dispositif pour melanger, degazer ou epaissir des resines synthetiques constituees de plusieurs composants et pouvant contenir des charges
GB2072030A (en) * 1980-03-10 1981-09-30 Chemetron Process Equip Universal batch processor
GB2130699A (en) * 1982-11-19 1984-06-06 Kai Lennart Neuvonen Means for drying and/or storing welding powder or equivalent

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536650A1 (fr) * 1991-10-11 1993-04-14 Alb. Klein GmbH & Co. KG Procédé et dispositif pour sècher des substances humides
EP0538065A1 (fr) * 1991-10-16 1993-04-21 Masao Kanai Dispositif de séchage
ES2068776A1 (es) * 1993-10-14 1995-04-16 Talleres Landaluce S A Sistema de secado del bagazo u otros subproductos humedos.
WO1995013512A1 (fr) * 1993-11-12 1995-05-18 Edwin Eisenegger Procede de traitement thermique d'un produit solide coulant, dispositif de melange pour son application et produit obtenu selon ce procede
CN101441026B (zh) * 2008-12-28 2010-10-27 嘉兴赞宇科技有限公司 一种复合式真空干燥器
IT201600083988A1 (it) * 2016-08-09 2018-02-09 Metech S R L Serbatoio di stoccaggio per resine di impregnazione
EP3281682A1 (fr) * 2016-08-09 2018-02-14 Metech S.r.l. Réservoir de stockage pour la résine pour imprégner
CN106382798A (zh) * 2016-08-30 2017-02-08 安徽省中阳管业有限公司 一种具有脱水功能的钢带烘干装置
WO2020029052A1 (fr) * 2018-08-06 2020-02-13 江苏荣达利机械有限公司 Structure de guidage de matériau pour une machine de séchage à trois cylindres
CN113883850A (zh) * 2021-10-08 2022-01-04 温州天顺建筑安装工程有限公司 一种厂房建设材料干燥处理系统

Also Published As

Publication number Publication date
EP0448766A3 (en) 1992-08-19
DE4009926A1 (de) 1991-10-02

Similar Documents

Publication Publication Date Title
DE2124010C3 (de) Wärmeaustauscher zum Erhitzen, Trocknen oder Abkühlen
EP0448766A2 (fr) Séchoir malaxeur, ou dispositif pour l'usinage et le traitement de produits liquides, pâteux, humides et secs
DE2343458A1 (de) Trockenapparat
EP0304925A1 (fr) Malaxeur comportant des fourches de malaxage
DE69501804T2 (de) Trocknungsvorrichtung und -verfahren
EP0754809B1 (fr) Dispositif pour extraire des matériaux séparables d'un liquide contenu dans une rigole
CH673406A5 (fr)
DE1546228A1 (de) Vorrichtung zum Einmischen von Bleichmittel in Zellulosebrei
DE2342516A1 (de) Maschine fuer das schaelen oder eine aehnliche oberflaechenbehandlung von koernerfruechten
DE3508711C2 (fr)
DE1952258A1 (de) Vorrichtung zum Behandeln von Textilgarn
DE2807725C2 (de) Vakuumtrockner, insbesondere zur Vortrocknung von Substanzen mit einem im Vergleich zur Flüssigkeit geringen Feststoffgehalt
DE2607265A1 (de) Rotierende vorrichtung zur kuehlung von gusstuecken und formsand besonders in giessereien
EP0664087A1 (fr) Dispositif de conditionnement thermique de fourrages et produits similaires
DE2304262B2 (de) Vorrichtung zum Beleimen von Spänen, Fasern oder ähnlichem Mischgut
DE2354880C2 (de) Vorrichtung zum Abdichten von Wellen
DE836345C (de) Vorrichtung zum fortlaufenden Mischen zweier Stoffe
DE2730942C2 (de) Schaufeltrockner
DE4135816C2 (de) Dünnschichtwärmetauscher
DE875185C (de) Maschine zum Nassbehandeln, insbesondere Faerben von Textilgut
DE7112402U (de) Beleimmaschine
DE2150026C3 (de) Vorrichtung zum Konditionieren von Tabak u.dgl. mittels einer Trommel
DE20114490U1 (de) Vorrichtung zum gleichzeitigen Mischen und Temperieren von fließfähigem Gut
DE2654773C2 (de) Flüssigkeitszuführung an einem Ringmischer zum Beleimen von Holzspänen und/oder Holzfasern
DE3201843A1 (de) "verfahren und vorrichtung zum trocknen von zuckerruebenschnitzeln"

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930220