EP0580625A1 - Procede pour le triage fin par types de pieces moulees thermoplastiques de provenance diverse - Google Patents

Procede pour le triage fin par types de pieces moulees thermoplastiques de provenance diverse

Info

Publication number
EP0580625A1
EP0580625A1 EP92907203A EP92907203A EP0580625A1 EP 0580625 A1 EP0580625 A1 EP 0580625A1 EP 92907203 A EP92907203 A EP 92907203A EP 92907203 A EP92907203 A EP 92907203A EP 0580625 A1 EP0580625 A1 EP 0580625A1
Authority
EP
European Patent Office
Prior art keywords
molded parts
proviso
temperature
shape
roller conveyor
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Withdrawn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
EP92907203A
Other languages
German (de)
English (en)
Inventor
Theodor Lentjes
Carsten Lentjes
Edgar Oerder
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.)
Individual
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
Application filed by Individual filed Critical Individual
Publication of EP0580625A1 publication Critical patent/EP0580625A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B03B1/02—Preparatory heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B9/00—General arrangement of separating plant, e.g. flow sheets
    • B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
    • B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/003—Separation of articles by differences in their geometrical form or by difference in their physical properties, e.g. elasticity, compressibility, hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0203—Separating plastics from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0255—Specific separating techniques using different melting or softening temperatures of the materials to be separated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the invention relates to a method for sorting thermoplastic molded parts of different provinces.
  • thermoplastics are synthetic, high-molecular substances or modified natural substances, the individual molecular chains of which are not linked to one another by chemical bonding. Their typical characteristic is that when the temperature rises they soften after their softening point is exceeded and harden again when they cool down.
  • Thermoplastic plastics are therefore used in practice for the production of semi-finished and finished parts, for example by injection molding, extrusion, blow molding and shaping (stretching).
  • the most common processes are injection molding and stretch forming.
  • molded parts of the most varied types and for a wide variety of uses are manufactured. Examples include: packaging, packaging containers, household items, technical parts and parts for motor vehicle construction.
  • Polystyrene and polypropylene are predominantly used for the application area mentioned. If they can be collected according to type after use, there is nothing standing in the way of their reuse, since corresponding recycling processes belong to the state of the art.
  • the molded parts are usually ground or shredded and extruded.
  • collecting the molded parts according to type is only possible to a small extent, for example at schools, hospitals or in restaurants, where it can be assumed that the packaging containers used consist of one and the same plastic. In relation to the total quantity, however, this part makes up only a very small percentage.
  • DE 30 35 629 C2 made the proposal to utilize the specific electrical properties of the individual thermoplastics and thus achieve a separation of the individual types in an electrical field.
  • thermoplastics can be used for a particularly simple and effective separation of different types of plastic.
  • each plastic is at a certain temperature (and this term represents a speaking temperature interval) from the solid to the plastic state when its softening temperature is reached, and vice versa, this also applies if the molded body formed from the plastic is heated again to the softening temperature and then cooled.
  • a packaging container made of polystyrene deforms again after heating to a temperature of approximately 80 to 90 ° C. and takes on its original shape, that is to say that of a plate, after a short heating time.
  • a corresponding volume reduction which can be between 50 and 95% depending on the type and size of the packaging container.
  • a corresponding polypropylene container remains completely dimensionally stable because the softening temperature of polypropylene is much higher (around 135 to 145 ° C).
  • the most general embodiment of the novel method then provides for the following steps:
  • the mixture of molded parts of different plastics is heated by direct or indirect heating to a temperature which corresponds to the softening temperature of those molded parts with the lowest softening temperature,
  • the process can be used both continuously and batchwise. In particular for large technical application areas, it is advisable to carry out the heating in an oven.
  • the heat can be transferred, for example, by hot air or superheated steam, but preferably by infrared or electrical heating. Cleaning (e.g. with superheated steam) and / or disinfection can be carried out at the same time.
  • the batch can be continuously passed through an oven for this purpose. If the mixture consists of only two thermoplastics, it is sufficient to heat the furnace to a temperature, specifically to a temperature which, as stated, corresponds to the softening temperature of those moldings with the lowest softening temperature. It also applies here that the temperature does not need to be maintained exactly, but that a certain temperature interval is available.
  • the softening temperatures of, for example, polystyrene and polypropylene are about 50 to 60 ° apart, so that exceeding the corresponding furnace temperature by, for example, 5 or 10 ° above the softening temperature of the material with the lowest softening temperature is harmless with respect to the desired separation.
  • the furnace is preferably designed as a continuous furnace, in which the molded parts pass through different temperature zones from the furnace inlet to the furnace outlet, which rise in the transport direction to the furnace end.
  • the already deformed molded parts are separated from the other molded parts after each furnace zone with a certain treatment temperature, which is also explained in more detail below.
  • roller ovens For example from the ceramic industry, so-called roller ovens are known in which the material to be burned is conveyed via a roller conveyor, the individual rollers being driven individually, in groups or as a whole in order to transport the material through the furnace.
  • An analog furnace design can also be used to separate different thermoplastic molded parts.
  • the rollers are preferably at such a distance from one another that the molded parts which are deformed in the corresponding furnace zone fall down through the slots formed between the rollers, where they can then be removed, while the other molded parts, which have remained largely unchanged in shape, remain on the roller conveyor and are transported further through the furnace. It is obvious that the volume reduction of the molded parts results in completely different geometries during the deformation; for example - as shown - the yoghurt burner becomes a round plate after a temperature treatment at around 90 ° C, which then falls down through the slots between adjacent rolls.
  • the deformed parts can be separated from the non-deformed parts by simply blowing off the non-deformed parts laterally via a corresponding blower arrangement, while the deformed and thus much heavier parts remain on the transport floor.
  • a kind of wind sifting takes place here, which can be used both in the oven and behind the oven.
  • the batch is passed through a closed floor through the oven, it falls as a batch at the furnace exit and it can then be fed to an air classifier and the plastics can then be separated in the manner mentioned.
  • packaging containers or drinking cups from the food sector consist almost exclusively of polystyrene and polypropylene.
  • plastic batches are formed which only consist of these two types.
  • the method can also be applied analogously to completely different types of plastic and plastic parts.
  • FIG. 1 a schematic representation of a polystyrene drinking cup and a polypropylene drinking cup in the original state and after heating to 90 ° C.
  • Figure 2 in a highly schematic representation, a longitudinal section through an oven for heating the above-mentioned molded parts.
  • the same or equivalent elements are shown with the same reference numerals.
  • Figure la shows a yogurt cup 10 made of polystyrene. It can be seen that the peripheral edge 10a e. Has a greater material thickness than the base body 10b. This results from the production of the cup 10 in the stretch-forming process (deep-drawing process).
  • Figure lb shows the "cup" 10 of Figure la after a 5-minute temperature treatment at 90 ° C. It has completely lost its shape and assumed the shape of a slightly deformed plate (round blank). (10 ').
  • the same cup 10, produced by the injection molding process also loses its shape at approximately 90 ° C., but not as quickly as the cup produced by the stretch-forming process, so that after the same treatment time its shape is still slightly three-dimensional or after a correspondingly longer treatment time is analogous to that according to FIG. 1b.
  • FIG. 1c shows a yoghurt cup 12, likewise produced in the stretch-forming process, but which here consists of polypropylene. It also has a reinforced peripheral edge 12a. According to the 'base member 12b has a smaller material thickness.
  • FIG. 1d where the cup is shown with the reference number 12 '. It is obvious that the cups 10 ', 12' can now be easily separated from one another by optical or mechanical selection. While the cup 12 'is very light and can be discharged, for example, by a blower, the round blank 10', whose material thickness now corresponds overall to that of the edge 10a, remains on the corresponding transport device due to its higher density.
  • the basic structure of the furnace 14 - apart from its size and the heating units - corresponds to a conventional Rolle ⁇ ofe ⁇ , as used for example in the ceramic industry.
  • a roller conveyor 16 can be seen, which consists of a plurality of rollers 18 which are arranged at a distance from one another and which together form a transport plane. While the rollers 18 are arranged relatively closely behind one another directly behind the furnace inlet 14a and immediately in front of the furnace outlet 14b, the rollers 18 are formed at a greater distance from one another in the region in between.
  • An electric ceiling heater 22, not shown, is installed in the area of the oven ceiling 20 and is designed such that a room temperature of approximately 90 in the oven, in particular in the middle of the oven, where the rollers 18 are at a greater distance from one another ° C prevails.
  • the batch of cups 10, 12 is now placed on the roller conveyor 16 via the furnace inlet 14a and transported via the driven rollers 18 in the direction of the outlet end at 14b.
  • the cups 10, 12 lie randomly side by side and one above the other. In their further transport in the direction of arrow T, the cups 10, 12 are heated to 90 ° C. While the cups 10 deform after a certain transport distance, treatment time and heating, as can be seen in the figure, the cups 12 remain completely dimensionally stable.
  • the cups 10 Approximately in the middle of the transport path between the furnace inlet 14a and the furnace outlet 14b, the cups 10 have deformed into two-dimensional round plates 10 'which now fall down between adjacent rollers 18, while the cups 12' remain on the roller conveyor.
  • the blanks 10 'on the one hand and the cups 12' on the other hand are then collected according to type and fed to further processing processes (known recycling processes) in order to produce new, single-type raw materials.
  • the treatment temperature is chosen so that it is the same or slightly is above the softening temperature of the molded parts which have the lowest softening temperature; at the same time, the treatment temperature must be limited in such a way that the molded parts made of other materials are not deformed, or at least not significantly deformed. This limitation must be carried out at the same time so that the melting temperature of the material with the lowest softening point is not yet reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

Les pièces moulées (10, 12) sont portées à une température correspondant à la température d'amollissement des pièces moulées (10) ayant la température d'amollissement la plus basse. Ces pièces moulées (10) sont chauffées jusqu'à ce qu'elles aient perdu leur forme originale par réduction du volume. Ensuite, les pièces moulées déformées (10') sont séparées des pièces moulées restant inchangées.
EP92907203A 1991-04-13 1992-03-30 Procede pour le triage fin par types de pieces moulees thermoplastiques de provenance diverse Withdrawn EP0580625A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4112179 1991-04-13
DE19914112179 DE4112179C1 (fr) 1991-04-13 1991-04-13

Publications (1)

Publication Number Publication Date
EP0580625A1 true EP0580625A1 (fr) 1994-02-02

Family

ID=6429559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92907203A Withdrawn EP0580625A1 (fr) 1991-04-13 1992-03-30 Procede pour le triage fin par types de pieces moulees thermoplastiques de provenance diverse

Country Status (4)

Country Link
EP (1) EP0580625A1 (fr)
AU (1) AU1431292A (fr)
DE (2) DE4112179C1 (fr)
WO (1) WO1992018313A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137170A1 (de) * 1991-11-12 1993-05-13 Reinhold Zenk Verfahren zur schuettvolumenreduktion von gegenstaenden aus thermoplastischen kunststoffen sowie vorrichtung hierzu
DE4220665C2 (de) * 1992-06-24 1995-05-18 Urban Dipl Ing Stricker Verfahren zur Gewinnung von thermoplastischen Schaumstoffanteilen aus einem Kunststoffabfälle enthaltenden Gemenge
DE4220666C2 (de) * 1992-06-24 1995-02-09 Urban Dipl Ing Stricker Vorrichtung zur Sortierung von Thermoplasten aus einem Gemengestrom
FR2708374B1 (fr) * 1993-07-26 1995-10-13 Kertscher Sa E Procédé de récupération de matières, notamment de couple de matières du type plastique/métal.
EP1090727A1 (fr) * 1999-09-15 2001-04-11 SALYP ELV Center NV La récupération et la préparation de matières plastiques à partir de déchets plastiques

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814240A (en) * 1972-09-13 1974-06-04 Us Agriculture Separation of thermoplastic film and wastepaper
US4033804A (en) * 1975-07-07 1977-07-05 Monsanto Company Reclaiming waste plastics
DE3035649C2 (de) * 1980-09-20 1983-01-20 Kali Und Salz Ag, 3500 Kassel Verfahren zur elektrostatischen Trennung von Kunststoffgemengen
DE3601175A1 (de) * 1986-01-17 1987-07-23 Thyssen Industrie Verfahren und vorrichtung zum trennen von unterschiedlichen polymeren aus polymergemischen
DE3768361D1 (de) * 1986-07-26 1991-04-11 Carstens Handelsgesellschaft M Verfahren und vorrichtung zur volumenreduzierung von formstabilen, entleerten behaeltern aus thermoplastischem kunststoff.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9218313A1 *

Also Published As

Publication number Publication date
WO1992018313A1 (fr) 1992-10-29
AU1431292A (en) 1992-11-17
DE4291172D2 (de) 1994-04-28
DE4112179C1 (fr) 1992-05-07

Similar Documents

Publication Publication Date Title
DE69805347T2 (de) Blasformverfahren zur Herstellung von wärmebeständigen Behältern
EP0631537B1 (fr) Procede et dispositif pour la collecte et la regranulation de dechets contenant des matieres plastiques etirees
DE102012011762A1 (de) Vereinzelungsvorrichtung für Vorformlinge mit einer Einrichtung zum Aussondern von falsch positionierten Vorformlingen
EP0580625A1 (fr) Procede pour le triage fin par types de pieces moulees thermoplastiques de provenance diverse
DE2452866A1 (de) Verfahren zum formen von thermoplastischen polymeren materialien
DE69222301T2 (de) Herstellung geformter teile aus biaxial gerichtetem polymermatirial
EP2447033B1 (fr) Procédé et dispositiv de fabrication de récipients en plastique et/ou de préformes en plastique
DE4207210A1 (de) Verfahren und vorrichtung zur erhoehung der oberflaechenrauhigkeit von thermoplastischen kunststoffen
ZA937786B (en) Process of making shaped articles from synthetic thermoplastic materials
DE4313977A1 (de) Verfahren zur Wiederverwertung von Kunststoff-Hausmüllabfällen
DE4303500A1 (en) Plastics sepn. for polyvinyl chloride and polyethylene terephthalate bottles - by sepg. hollow components contacting heated body and with lower softening point w.r.t. various physical properties e.g. elasticity
DE4220666C2 (de) Vorrichtung zur Sortierung von Thermoplasten aus einem Gemengestrom
DE19643603A1 (de) Verfahren zur Herstellung gereinigter Kunststoffteilchen aus Kunststoffabfällen sowie deren Verwendung in einer Mischung für die Herstellung von Formteilen, insbesondere von Paletten sowie Vorrichtung zur Durchführung des Verfahrens
EP1819492B1 (fr) Decontamination de copeaux
DE2519992C3 (de) Vorrichtung zum Abschneiden von Ansätzen an blasgeformten thermoplastischen Hohlkörpern
DE69300221T2 (de) Kunststoffbehälter und verfahren zu seiner herstellung.
EP2465656B1 (fr) Procédé de séparation de polymères étrangers à partir d'un mélange de polymères
WO1994026494A1 (fr) Procede et dispositif permettant de realiser des pieces moulees a partir de dechets plastiques
DE4220665C2 (de) Verfahren zur Gewinnung von thermoplastischen Schaumstoffanteilen aus einem Kunststoffabfälle enthaltenden Gemenge
DE1704215A1 (de) Vorrichtung zur Entfernung der Formgrate von in Blasformen hergestellten Kunststoffgegenstaenden
DE966185C (de) Verfahren zur Verbesserung der Eigenschaften von Polyaethylen
DE19829936A1 (de) Verfahren zur Herstellung eines Formteils aus einer Polyactid-Folie
EP0626900B1 (fr) Procede pour le recyclage de corps creux moules en matiere plastique
DE2842074A1 (de) Verfahren zum formen von hohlkoerpern durch verformung eines zuschnittes eines thermoplastischen kunststoffes
DE19506448C2 (de) Formstück aus verschiedenen Fraktionen thermoplastischer Kunststoffe sowie Verfahren und Vorrichtung zur Herstellung eines solchen Formstückes

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

17P Request for examination filed

Effective date: 19930730

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19940926

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: 19950207