EP0562234B1 - Tambour mélangeur et sécheur pour la préparation en continue des enrobés bitumineux en recyclage de matériaux récupérés - Google Patents

Tambour mélangeur et sécheur pour la préparation en continue des enrobés bitumineux en recyclage de matériaux récupérés Download PDF

Info

Publication number
EP0562234B1
EP0562234B1 EP93101297A EP93101297A EP0562234B1 EP 0562234 B1 EP0562234 B1 EP 0562234B1 EP 93101297 A EP93101297 A EP 93101297A EP 93101297 A EP93101297 A EP 93101297A EP 0562234 B1 EP0562234 B1 EP 0562234B1
Authority
EP
European Patent Office
Prior art keywords
drum
drier
cylinder
reclaimed
aggregates
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
EP93101297A
Other languages
German (de)
English (en)
Other versions
EP0562234A1 (fr
Inventor
Antonio Cipriani
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.)
Marini SpA
Original Assignee
MATRA Srl
Marini SpA
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 MATRA Srl, Marini SpA filed Critical MATRA Srl
Publication of EP0562234A1 publication Critical patent/EP0562234A1/fr
Application granted granted Critical
Publication of EP0562234B1 publication Critical patent/EP0562234B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C19/1013—Plant characterised by the mode of operation or the construction of the mixing apparatus; Mixing apparatus
    • E01C19/1027—Mixing in a rotary receptacle
    • E01C19/1036—Mixing in a rotary receptacle for in-plant recycling or for reprocessing, e.g. adapted to receive and reprocess an addition of salvaged material, adapted to reheat and remix cooled-down batches
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/1086—Mixing containers having concentric drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
    • E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
    • E01C2019/1081—Details not otherwise provided for
    • E01C2019/109—Mixing containers having a counter flow drum, i.e. the flow of material is opposite to the gas flow

Definitions

  • the present invention relates to a drum mixer-drier for the continuous preparation of bituminous mixes with recycling of reclaimed materials, as defined in the preamble of the appended claim 1 and as disclosed in EP-A-0 347 281.
  • Drier-mixers of the described type (hereinafter termed simply “mixers” for the sake of brevity in description) are already known. They comprise a drum with internal blades which rotates about an axis which is slightly inclined with respect to a horizontal plane; the aggregates are introduced at the upper end of the drum and, by means of the rotation of the drum, move toward the opposite lower end, where the discharge outlet is located. A burner, orientated along the axis of the drum, is arranged in said upper end and dries and heats the aggregates.
  • the bitumen inlet is located at a certain distance from the burner; the bitumen, with the addition of additives, is mixed together with the aggregates.
  • the bitumen inlet is located at a distance from the burner which is sufficient to avoid the formation of fumes.
  • the inlet for the reclaimed material generally constituted by mixes which originate from the demolition of old paving. This reclaimed material (recyclable asphalt pavement, hereinafter abbreviated as RAP) is mixed with the aggregates and the bitumen.
  • a drawback of the known mixers is the difficulty encountered in heating the aggregates to a high temperature while at the same time preventing the bitumen and the RAP from reaching temperatures which cause the formation of fumes.
  • a technical aim of the present invention is therefore to provide a drier-mixer which obviates the above described problems related to the exposure of bitumen and RAP to excessive heat.
  • the mixer is generally designated by the reference numeral 1 and comprises a base 2 which may be mounted on wheels for the transfer of the mixer to the work site.
  • a drum 3 is mounted on the base for rotation about the axis A.
  • the axis A is slightly inclined with respect to the horizontal plane, so that the drum has an uppermost or upper end 4 and a lower end 5.
  • the drum proximate to the ends 4 and 5, there are two hoops or annular flanges 6 and 7 which constitute two rolling tracks engaged by pairs of rollers 8 and 9 on which the drum rolls.
  • the rollers 8 and 9 are rotatable in appropriate supports fixed to the base.
  • the rotation of the drum is produced by a gearmotor 10 which is fixed to the base and is provided with an output pinion 11 on which a chain 12 is entrained; said chain is also entrained around a toothed wheel 13 which is fixed to the outside of the drum 3, thus defining a closed-loop formation.
  • the reference numeral 14 designates a cylinder which is arranged concentrically around the lower portion of the drum and defines, together with said drum, an annular interspace 15.
  • the cylinder 14 is rigidly coupled to the base 2, on which it rests by means of lateral feet 16, and comprises two flanges 17 and 18 which are at right angles to the axis A and have an annular crown shape; the inner edge of the flanges 17,18 skims or slidingly contacts the outer surface of the drum 3 so as to close the interspace 15 at its opposite ends.
  • the upper end 4 of the drum is closed by a fume expansion chamber 19, outside which a hopper 20 for feeding the aggregates is fitted; said aggregates are introduced in the drum through an opening of the chamber 19.
  • the drum is furthermore connected, by means of an opening 21 of the fume expansion chamber, to a stack 22 for aspirating the volatile substances and the dust which form during preparation of the bituminous mix.
  • RAP reclaimed material
  • the RAP is introduced into the drum through a funnel 23 which leads into an annular duct 24 located at a preset distance from the flange 18 of the cylinder 14.
  • the annular duct 24 defines, around the drum, an annular chamber 25 in which blades 26 rotate; said blades are fixed to the outside of the drum 3.
  • Openings 27 are defined on the drum between the blades 26 and allow the RAP to pass inside the drum during its rotation.
  • the blades 26 are rigidly coupled to the drum 3 at the annular chamber 25 along a band 30 which is as wide as said chamber and defines recesses 28a.
  • the recesses 28a are open towards the end 5 and are closed toward the end 4.
  • Wings 28 and 29 are rigidly coupled to the inner surface of the drum.
  • the wings 29 extend up to the end 4 and the wings 28 extend from the annular duct 24 toward the end 5, end at the level of the flange 18 and are shaped so as to cause advancement of the material in the direction B.
  • the wings 29 furthermore have a substantially L-shaped profile which, during rotation of the drum, facilitates the tipping or cascading of the material through the combustion gases and enhances heat exchange with them.
  • the wings 28 are instead shaped so as to shield the internal surface of the drum 3 from the radiant heat of the flame. They simultaneously prevent the rise of the material and thus its falling through the flame. The heat received by the wings 28 is transferred, upon each rotation of the drum 3, to the material which flows in the lower region in this portion of the drum.
  • the portion of the drum which extends from the flange 33 to the end 5 constitutes the combustion chamber 34, into which the flame of a burner 35, which is coaxial to the axis A, is directed.
  • the combustion chamber 34 is internally covered with a lining of ceramic fibers 36 which protects the drum against excessive temperatures.
  • the burner 35 is mounted on a flange 37 which is supported by a support 38 fixed on the base 2.
  • the flange 37 is arranged adjacent to the end 5 of the drum in order to allow rotation of the drum with respect to the burner.
  • the drum 3 is externally provided, along the portion which corresponds to the length of the cylinder 14, with fins 39 for mixing the material and conveying it toward a discharge outlet 40 located adjacent to the flange 17.
  • the outlet 40 leads into a hopper 41 provided with a discharge shutter 42.
  • the described mixer is completed by two ducts 43 and 44 for feeding bitumen and respectively additives (fillers) into the interspace 15.
  • the ducts 43 and 44 are arranged on the fixed cylinder 14 on a plane which is perpendicular to the axis A and is located downstream of the flange 18.
  • the blades 39 thoroughly mix the aggregates and the RAP with bitumen and additives, added through the ducts 43 and 44 to produce a final mix which has a temperature in the range of 150-180° and is discharged into the hopper 41 through the outlet 40.
  • the inside of the drum due to aspiration through the stack 22, is at a negative pressure, so that any gases released from the mix during mixing in the interspace 15 pass through the openings 31 into the drum, where they are burned.
  • the shapes and dimensions may furthermore be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Drying Of Solid Materials (AREA)

Claims (7)

  1. Mélangeur-sécheur (1) pour la préparation en continu d'enrobés bitumineux pour des revêtements de chaussée, comprenant:
    - un tambour (3) qui est supporté à rotation autour d'un axe longitudinal (A) qui est incliné par rapport au plan horizontal, de façon à présenter une extrémité inférieure (5) et une extrémité supérieure (4),
    - des moyens (10 à 12) pour faire tourner ledit tambour autour dudit axe;
    - un brûleur (35) disposé à l'extrémité inférieure (5) dudit tambour (3) pour diriger une flamme le long dudit axe longitudinal (A) vers l'extrémité supérieure (4) du tambour (3) afin de le chauffer intérieurement;
    - des moyens (20) pour introduire des agrégats à l'extrémité supérieure (4) dudit tambour (3),
    - un cylindre fixe (14) qui entoure concentriquement la partie inférieure dudit tambour (3) et définit un espace intermédiaire annulaire (15) avec ladite partie, ledit cylindre (14) représentant une extrémité inférieure qui est proche du brûleur (35), et une extrémité supérieure;
    - des moyens (23 à 27) pour introduire du matériau bitumineux de récupération dans ledit tambour (3) en un emplacement qui est situé à une distance prédéterminée de l'extrémité supérieure dudit cylindre (14);
    - des moyens (31 à 32) pour transférer ledit matériau de récupération et lesdits agrégats depuis ledit tambour (3) dans ledit espace intermédiaire annulaire (15), à l'extrémité supérieure dudit cylindre (14);
    - des moyens (28 à 29) qui sont fonctionnellement associés à l'intérieur dudit tambour (3) afin de provoquer l'avance desdits agrégats et dudit matériau de récupération vers lesdits moyens (31 à 32) pour les introduire dans l'espace intermédiaire annulaire (15);
    - des moyens (43, 44) pour introduire du bitume, de la matière de charge et des additifs à proximité de l'extrémité supérieure dudit cylindre (14); et
    - des moyens (39) qui sont fonctionnellement associés à l'extérieur dudit tambour (3) le long dudit cylindre fixe (14) afin de mélanger lesdits agrégats et ledit matériau de récupération avec ledit bitume, avec ladite matière de charge et lesdits additifs, de façon à obtenir un mélange bitumineux et à provoquer l'avance dudit enrobé vers une sortie de décharge (40) disposée à l'extrémité inférieure dudit cylindre (14);
    le mélangeur-sécheur étant caractérisé en ce que:
    ledit espace intermédiaire (15) est complètement isolé de l'intérieur dudit tambour (3) à la partie inférieure dudit tambour (3) et à l'extrémité inférieure dudit cylindre (14);
    lesdits moyens (31 à 32) pour transférer ledit matériau de récupération et lesdits agrégats dudit tambour (3) dans ledit espace intermédiaire annulaire (15) sont aptes à transférer la totalité dudit matériau de récupération et des agrégats hors de l'intérieur dudit tambour (3) et dans ledit espace intermédiaire annulaire (15);
    la sortie dudit brûleur (35) est disposée à l'extrémité inférieure (5) du mélangeur-sécheur; et
    lesdits moyens (43, 44) pour introduire du bitume, de la matière de charge et des additifs sont aptes à introduire les matériaux directement dans l'espace intermédiaire annulaire isolé (15), de telle façon que les matériaux ne pénètrent pas à l'intérieur dudit tambour (3).
  2. Mélangeur-sécheur selon la revendication 1, caractérisé en ce que lesdits moyens pour introduire du matériau bitumineux de récupération comprennent un conduit annulaire (24) qui s'étend autour dudit tambour à une distance prédéterminée depuis l'extrémité supérieure dudit cylindre (14) et qui définit une chambre annulaire (25) dans laquelle tourne une pluralité de pales (26), lesdites pales étant fixées à l'extérieur dudit tambour (3), des ouvertures (27) étant définies entre lesdites pales pour le passage du matériau dans le tambour, lesdites ouvertures (27) étant reliées à des cavités (28a) agencées à l'intérieur du tambour, et axialement ouvertes vers ledit cylindre (14).
  3. Mélangeur-sécheur selon la revendication 1 ou 2, caractérisé en ce que lesdits moyens pour transférer ledit matériau de récupération et lesdits agrégats depuis ledit tambour dans ledit espace intermédiaire (15) comprennent: des ouvertures (31) définies dans ledit tambour (3) à l'extrémité supérieure dudit espace intermédiaire (15); et des déflecteurs (32) qui sont associés auxdites ouvertures (31) et qui sont agencés du côté opposé à celui où le matériau avance, lesdits déflecteurs étant appropriés pour transporter ledit matériau dans lesdites ouvertures (31).
  4. Mélangeur-sécheur selon la revendication 1, caractérisé en ce que lesdits moyens fonctionnellement associés avec l'extérieur dudit tambour sont constitués par des lames (39).
  5. Mélangeur-sécheur selon la revendication 1, caractérisé en ce que la partie dudit tambour (3) autour de laquelle s'étend ledit cylindre (14) est intérieurement recouverte d'un garnissage thermiquement isolant (36).
  6. Mélangeur-sécheur selon la revendication 1, caractérisé en ce que lesdits moyens pour l'avance du matériau à l'intérieur du tambour (3) sont essentiellement constitués par:
    - des ailes (29) à profil sensiblement en forme de L, couplées à la surface intérieure du tambour (3) et s'étendant depuis ladite extrémité supérieure (4) jusqu'à la zone d'introduction du matériau bitumineux de récupération dans ledit tambour (3);
    - des cavités (28a) agencées à l'intérieur du tambour (3) en communication avec des ouvertures (27) du tambour pour le passage du matériau bitumineux de récupération dans le tambour, lesdites cavités étant ouvertes vers ladite extrémité inférieure (5) et fermées vers ladite extrémité supérieure (4); et
    - des ailes (28) couplées à la surface intérieure du tambour (3) et s'étendant depuis la zone d'introduction du matériau bitumineux de récupération jusqu'auxdits moyens (31 à 32) pour transférer ledit matériau de récupération et lesdits agrégats depuis ledit tambour (3) dans ledit espace intermédiaire annulaire (15), lesdits ailes (28) présentant une forme propre à définir des écrans pour protéger la surface intérieure du tambour (3) contre le rayonnement et de façon à transférer la chaleur au matériau.
  7. Mélangeur-sécheur selon la revendication 6, dans lequel lesdites ailes (29) à profil en forme de L provoquent la chute en cascade du matériau à l'intérieur du tambour, et lesdites ailes (28) empêchent la levée et, par voie de conséquence, la chute du matériau à l'intérieur du tambour.
EP93101297A 1992-02-04 1993-01-28 Tambour mélangeur et sécheur pour la préparation en continue des enrobés bitumineux en recyclage de matériaux récupérés Expired - Lifetime EP0562234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO920032 1992-02-04
ITBO920032A IT1257637B (it) 1992-02-04 1992-02-04 Essiccatore-miscelatore a tamburo per la preparazione a ciclo continuodi conglomerati bituminosi con riciclaggio di materiali di recupero

Publications (2)

Publication Number Publication Date
EP0562234A1 EP0562234A1 (fr) 1993-09-29
EP0562234B1 true EP0562234B1 (fr) 1997-05-28

Family

ID=11337960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93101297A Expired - Lifetime EP0562234B1 (fr) 1992-02-04 1993-01-28 Tambour mélangeur et sécheur pour la préparation en continue des enrobés bitumineux en recyclage de matériaux récupérés

Country Status (4)

Country Link
EP (1) EP0562234B1 (fr)
DE (1) DE69310972T2 (fr)
ES (1) ES2104969T3 (fr)
IT (1) IT1257637B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9404618A (pt) * 1994-11-24 1997-03-04 Aco Paulista Sa Usina de asfalto
ATE536443T1 (de) * 2009-07-09 2011-12-15 Ammann Italy S P A Trockentrommel für anlagen für die herstellung von bituminösem mischgut unter verwendung von recyclingmaterial
ATE537300T1 (de) 2009-07-09 2011-12-15 Ammann Italy S P A Drehtrockner für anlagen zur herstellung von bituminösem mischgut unter verwendung von wiederverwendeten materialien
FR2986016B1 (fr) * 2012-01-25 2014-03-21 Argumat Dispositif et procede de fabrication de produits enrobes, par exemple de produits enrobes bitumineux, a plaques de protection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136966A (en) * 1974-07-15 1979-01-30 Mendenhall Robert Lamar Asphalt sleeve mixer apparatus
US4867572A (en) * 1987-09-08 1989-09-19 Astec Industries, Inc. Asphalt plant with fixed sleeve mixer
FR2632670A1 (fr) * 1988-06-13 1989-12-15 Ermont Cm Dispositif de preparation de produits enrobes bitumineux a malaxeur fixe
US5052810A (en) * 1990-02-16 1991-10-01 Astec Industries, Inc. Asphalt drum mixer with bypass temperature control

Also Published As

Publication number Publication date
DE69310972T2 (de) 1998-07-09
ITBO920032A1 (it) 1993-08-04
IT1257637B (it) 1996-02-01
ITBO920032A0 (it) 1992-02-04
EP0562234A1 (fr) 1993-09-29
ES2104969T3 (es) 1997-10-16
DE69310972D1 (de) 1997-07-03

Similar Documents

Publication Publication Date Title
US4787938A (en) Countercurrent drum mixer asphalt plant
US5090813A (en) Dual drum recycle asphalt drying and mixing method and apparatus
US3999743A (en) Asphalt-aggregate recycle process and apparatus
US5054931A (en) Counterflow asphalt drum mixer producing less hydrocarbon emissions and a method used therein
US5174650A (en) Dual drum recycle asphalt drying and mixing method and apparatus
CA1097456A (fr) Methode et dispositif de recyclage du beton bitumineux chaud
US5273355A (en) Aggregate dryer and soil incinerator
US4867572A (en) Asphalt plant with fixed sleeve mixer
US5364182A (en) Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone
US4318619A (en) Method of and apparatus for asphaltic concrete hot mix recycling
US4143972A (en) Combustion control system for bituminous drum mixers
WO1993007431A1 (fr) Secheur a tambour rotatif dote de volets internes
US7044630B1 (en) Counter-flow asphalt plant method
US4955722A (en) Appliance for the preparation of bituminous coated products with a stationary mixer
US20070070801A1 (en) Pre-combustion mix drum
US4207062A (en) Heating and mixing apparatus for asphaltic pavement
JPH059907A (ja) リサイクルアスフアルト舗装の再処理ドラムドライアー
CA1280108C (fr) Methode et dispositif de malaxage de compositions bitumineuses
JPH0216203A (ja) ビチューメン製品を調製する装置と方法
US5558432A (en) Drum mixer having a combined heating/mixing zone with aggregate entry at both ends
US6185842B1 (en) Apparatus and methods for controlling the temperature of exhaust gases in a drum mixer
EP0562234B1 (fr) Tambour mélangeur et sécheur pour la préparation en continue des enrobés bitumineux en recyclage de matériaux récupérés
US4522498A (en) Asphaltic concrete recycle apparatus and method
USRE31904E (en) Method and apparatus for recycling asphalt-aggregate compositions
US5261738A (en) Asphalt drum mixer with bypass for controlling the temperature of the exhaust gas

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: A1

Designated state(s): CH DE ES FR GB LI

17P Request for examination filed

Effective date: 19940311

17Q First examination report despatched

Effective date: 19950801

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19970528

Ref country code: FR

Effective date: 19970528

Ref country code: CH

Effective date: 19970528

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69310972

Country of ref document: DE

Date of ref document: 19970703

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: MARINI S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2104969

Country of ref document: ES

Kind code of ref document: T3

EN Fr: translation not filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19990108

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990113

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990330

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000129

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000128

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20011010