EP0033281B1 - Vorrichtung zum Spritzen eines Wandbelages, insbesondere für eine Aushöhlung - Google Patents

Vorrichtung zum Spritzen eines Wandbelages, insbesondere für eine Aushöhlung Download PDF

Info

Publication number
EP0033281B1
EP0033281B1 EP81400115A EP81400115A EP0033281B1 EP 0033281 B1 EP0033281 B1 EP 0033281B1 EP 81400115 A EP81400115 A EP 81400115A EP 81400115 A EP81400115 A EP 81400115A EP 0033281 B1 EP0033281 B1 EP 0033281B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal wheel
pipework
filler
whirling
admission
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
Application number
EP81400115A
Other languages
English (en)
French (fr)
Other versions
EP0033281A1 (de
Inventor
Lucien Tinchon
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.)
Houilleres du Bassin de Lorraine
Original Assignee
Houilleres du Bassin de Lorraine
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 Houilleres du Bassin de Lorraine filed Critical Houilleres du Bassin de Lorraine
Priority to AT81400115T priority Critical patent/ATE5912T1/de
Publication of EP0033281A1 publication Critical patent/EP0033281A1/de
Application granted granted Critical
Publication of EP0033281B1 publication Critical patent/EP0033281B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/138—Plastering the borehole wall; Injecting into the formation
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
    • E21B41/0078—Nozzles used in boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D5/00—Lining shafts; Linings therefor
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/10—Pipe and tube inside

Definitions

  • the subject of the invention is a device for simultaneously projecting a liquid or pasty product and a pulverulent, granular or fibrous filler to produce a reinforced plastic wall covering or coating, in which the product is pumped to a centrifugal projection with central feed.
  • the published German patent application number 2808903 describes a device intended to project two components of a plastic material against the interior surface of a pipe.
  • This device essentially comprises a shaft at one end of which is fixed in rotation a centrifugal disc with a convex or conical face opposite which open two parallel pipes, arranged symmetrically with the shaft in the same diametral plane.
  • the two components are sent under pressure and they meet in the same annular zone the centrifugal disc which projects them against the interior surface of the pipeline.
  • This device is useful when it comes to projecting components which are not very different and above all, which support or require to be mixed at the same time of their projection.
  • the coating can be a mortar, plaster or a resin setting on the projected surface.
  • a pulverulent, grainy or fibrous filler in particular a glass fiber filler, is sprayed onto this first layer.
  • a coating is commonly used for the sealing of rock walls and to prevent falls of granular or pulverulent materials.
  • aminoplast resin sprayed with shredded glass fibers Of course, the applications of the invention will not be limited to this particular application, nor to the products mentioned.
  • the known devices used for the application of this process require the presence, in the immediate vicinity, of an operator.
  • the object of the invention is to provide a new device which is easier to use than known devices, which can be used conveniently in excavations, even if they are inaccessible or difficult for a man to access, and therefore can be operated remotely and operate safely, which requires no risk of blockage.
  • the turnstile and the centrifugal wheel are rotated on the same shaft.
  • the means of supplying the load is a pneumatic transport pipe which opens into the axis of the centrifugal wheel on the side opposite the turnstile and the centrifugal wheel is conical with its apex directed towards the discharge end of this pipe.
  • the device of the invention comprises means of support in translation on the walls, which means advantageously serve as centering means and cause that the axis of the turnstile and the direction of translation are parallel.
  • the speed of coating of the constituent material will be improved.
  • the load by orienting the device so that the centrifugal wheel is upstream aerating relative to the turnstile.
  • a housing 1 consists of a sealed rolling bearing with two ball bearings 2 and 3, provided in the vicinity of its ends, for a shaft 4 which passes right through it.
  • the shaft 4 carries a hub 13 traversed by tubes 6 at regular angular distances, for example two tubes at 180 ° from one another, substantially radial from the hub, then slightly bent , open at their ends remote from the axis and communicating on the axis with a central channel 7 provided in the axis of the shaft 4 and extending to an annular groove 8 of the shaft 4 delimiting an annular chamber 9 between the shaft and the housing.
  • a transverse channel 10 puts the central channel 7 in communication with the annular chamber 8, into which opens a passage channel of the housing 1, itself connectable to a supply pipe 12.
  • the assembly described hitherto constitutes a turnstile 20 with central feed for the projection of the product, which can be brought under pressure via the pipe 12.
  • the hub 13 carries, on a side opposite the shaft 4, a short shaft 14 of axis extending the axis of the shaft and carrying at its end a wheel 15 in the form of an obtuse cone 16 whose apex 17 is directed opposite the turnstile.
  • a pipe 18 opens into the axis of the wheel 15 near the apex 17 of the cone 16.
  • the pipe 18 is a pipe for pneumatic transport of glass fiber supply previously shredded, or other suitable material that can be transported pneumatically, from a storage hopper 19 (FIG. 3) by suction in a pipe 21 by means of an ejector 22 supplied with compressed air by a pipe 23.
  • the shaft 4 is shaped as a cone 24 for attachment to a motor 38 constituted by a rotary perforator 25 with compressed air supplied with compressed air by a pipe 37.
  • a central tubular element 27 coaxial with the turnstile 20 is connected to the frame 26 and is arranged so as to release the projection planes of the turnstile and of the centrifugal wheel.
  • FIG 1 the central tubular member opposite the housing and the punch relative to the turnstile, but it could just as easily surround the housing and the punch, provided that the projection planes are clear.
  • the central tubular element 27 carries three skis 28 mounted on springs 29 to center the entire device in an excavation.
  • the tubular element 27 ends in a cone and a ring 30 for coupling the entire device to a hauling cable 31.
  • the frame 26 also carries a guide slide 32 for the return strand 33 of the hauling cable 31.
  • FIG 3 there is shown an application to the remote spraying of a resin reinforced with glass fibers to consolidate the walls of a borehole 40 of 600 mm in coal ground and simultaneously prevent oxidation of the solid in coal areas.
  • the purpose of drilling the borehole 40 was to improve the ventilation in a tracing track 41 from a gallery 42 of a neighborhood in operation and to serve as an emergency exit.
  • a winch 43 was installed in the tracing 41 for an endless cable 34, 33, 31 returned by a pulley 35 installed in the gallery 42.
  • the device of the invention is hauled into the borehole , thanks to the ring 30.
  • the turnstile is supplied with resin from a pumping station 36 through the pipe 12 and the centrifugal wheel is supplied with shredded glass fibers as has already been explained.
  • the survey also includes one or more compressed air pipes 23, 37, which have not been shown in FIG. 3 for the simplification of the drawings, but which are of the usual type in mines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nozzles (AREA)
  • Earth Drilling (AREA)
  • Coating Apparatus (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Claims (10)

1. Vorrichtung zum gleichzeitigen Spritzen eines flüssigen oder pastösen Produktes und einer pulverigen, körnigen oder faserigen Füllung, zur Herstellung eines plastischen verstärkten Wandbeiages, mit Rohrleitungen (12, 18) zur Zuführung unter Druck des Produkts bzw. der Füllung, mit einem Schleuderrad (15) zum Spritzen der Füllung, wobei die Rohrleitung (18) zur Zuführung der Füllung gegenüber der Oberfläche des Schleuderrades (15) mündet, dadurch gekennzeichnet, daß die Rohrleitung (12) zur Zuführung des Produktes in einen Mittelkanal (7) stößt, dessen Achse koaxial ist zu dem Teil der Rohrleitung (18) zur Zuführung der Füllung, die gegenüber dem Schleuderrad (15) mündet, daß der Mittelkanal (7) ein Spritzdrehkreuz (20) speist, welches drehbar um die gleiche. Achse wie die des Schleuderrades (15) befestigt ist, und daß das Schleuderrad und das Drehkreuz (20) im Abstand zueinander längs dieser gemeinsamen Achse angeordnet sind.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Drehkreuz (20) und das Schleuderrad (15) drehfest auf derselben Welle (4, 13, 14) nahe zueinander angeordnet sind.
3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Rohrleitung (18) zur Zuführung der Füllung an das Schleuderrad in der Achse des Schleuderrades (15) auf der Seite gegenüber dem Drehkreuz (20) mündet.
4. Vorrichtung nach Anspruch 3 mit einem konischen Schleuderrad (15) mit einer Spitze (17), dadurch gekennzeichnet, daß das Austrittsende der pneumatischen Transportrohrleitung (18) gegenüber der Spitze (17) mündet.
5. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Welle (4) des Drehkreuzes (20) und des Schleuderrades (15) von einem Motor (38) angetrieben wird.
6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß Elemente (28) zur Abstützung während des Verschiebens auf den Wänden einer Aushöhlung (40), beispielsweise einem Stollen, einem Tunnel, einem Schachtbrunnen oder einem Bohrloch, vorgesehen sind.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Abstützelemente (28) gleichzeitig Zentrierelemente sind.
8. Vorrichtung nach einem der Ansprüche 6 oder 7, dadurch gekennzeichnet, daß die Achse des Drehkreuzes (20) und die Verschiebungsrichtung parallel verlaufen.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß eine Einrichtung
(30) zum Anhängen an ein Kabel (31) und/oder eine Zugkette vorgesehen ist.
EP81400115A 1980-01-29 1981-01-27 Vorrichtung zum Spritzen eines Wandbelages, insbesondere für eine Aushöhlung Expired EP0033281B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81400115T ATE5912T1 (de) 1980-01-29 1981-01-27 Vorrichtung zum spritzen eines wandbelages, insbesondere fuer eine aushoehlung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001861A FR2474351B1 (fr) 1980-01-29 1980-01-29 Dispositif de projection d'enduit mural, notamment pour excavation
FR8001861 1980-01-29

Publications (2)

Publication Number Publication Date
EP0033281A1 EP0033281A1 (de) 1981-08-05
EP0033281B1 true EP0033281B1 (de) 1984-01-18

Family

ID=9237981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400115A Expired EP0033281B1 (de) 1980-01-29 1981-01-27 Vorrichtung zum Spritzen eines Wandbelages, insbesondere für eine Aushöhlung

Country Status (8)

Country Link
US (1) US4377127A (de)
EP (1) EP0033281B1 (de)
JP (1) JPS56121655A (de)
AT (1) ATE5912T1 (de)
BR (1) BR8100473A (de)
DE (1) DE3161903D1 (de)
FR (1) FR2474351B1 (de)
SU (1) SU1242001A3 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60248256A (ja) * 1984-05-25 1985-12-07 Shinichi Matsuda パイプのライニング装置
US4704985A (en) * 1986-05-30 1987-11-10 Nordson Corporation Spray gun mover
US5092265A (en) * 1989-10-23 1992-03-03 Hughes J David Apparatus for applying resin coatings
DE19500470A1 (de) * 1995-01-10 1996-07-11 Huckfeldt & Thorlichen Verfahren und Vorrichtung zum Herstellen von Wursthüllen sowie danach hergestellte Wursthülle
GB2503203A (en) * 2012-05-02 2013-12-25 Michael Pritchard Wellbore lining using a directional nozzle
CN106193548B (zh) * 2016-07-07 2019-01-29 上海筱臻金属制品有限公司 粘稠流体材料喷涂机
WO2019070297A1 (en) * 2017-10-06 2019-04-11 Halliburton Energy Services, Inc. DEVIATION ELEMENT FOR CEMENTING A CUT-OFF WINDOW IN A TUBING
CN120331819B (zh) * 2025-06-19 2025-08-19 长春黄金研究院有限公司 大直径双向v字形贯通孔巷道顶板淋水防治方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297099A (en) * 1940-02-08 1942-09-29 John M Crom Tunnel lining machine
FR1084168A (fr) * 1953-01-10 1955-01-17 Atomiseur
US3810441A (en) * 1968-12-12 1974-05-14 Raymond Int Inc Lining machine
FR2371627A1 (fr) * 1976-11-22 1978-06-16 Siargas Procede pour realiser des joints etanches dans une canalisation enterree. dispositif pour le mettre en oeuvre
FR2371242A1 (fr) * 1976-11-22 1978-06-16 Siargas Spa Procede et dispositif pour la formation de revetements etanches a l'interieur de conduites destinees au transport de fluides
DE2808903A1 (de) * 1978-03-02 1979-09-06 Karl Reinhard Zeiss Verfahren zum aufbringen eines homogenen kunststoffmantels auf die innenwandung von rohren und vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE437062C (de) 1926-11-13 Escher Wyss Maschf Ag Dampf- oder Gasturbine mit Leitscheiben, insbesondere fuer hohe Druecke und Waermegrade
US1971535A (en) * 1931-12-08 1934-08-28 Albert G Perkins Apparatus for coating pipe
US2168917A (en) * 1937-04-03 1939-08-08 Albert G Perkins Apparatus for coating pipes and the like
US2922583A (en) * 1959-04-06 1960-01-26 Perkins Pipe Linings Inc Pipe lining machine
US3108348A (en) * 1959-07-31 1963-10-29 Raymond Int Inc Lining of pipes including lining machine with belt drive trowels
CH437062A (de) * 1965-09-09 1967-05-31 Lechler Bautenschutzchemie Kg Gerät zum Beschichten der Innenwand von Hohlräumen, insbesondere von Rohrinnenwänden
US3690560A (en) * 1971-04-22 1972-09-12 John A Boyd Chute sanitizer and fire extinguisher

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297099A (en) * 1940-02-08 1942-09-29 John M Crom Tunnel lining machine
FR1084168A (fr) * 1953-01-10 1955-01-17 Atomiseur
US3810441A (en) * 1968-12-12 1974-05-14 Raymond Int Inc Lining machine
FR2371627A1 (fr) * 1976-11-22 1978-06-16 Siargas Procede pour realiser des joints etanches dans une canalisation enterree. dispositif pour le mettre en oeuvre
FR2371242A1 (fr) * 1976-11-22 1978-06-16 Siargas Spa Procede et dispositif pour la formation de revetements etanches a l'interieur de conduites destinees au transport de fluides
DE2808903A1 (de) * 1978-03-02 1979-09-06 Karl Reinhard Zeiss Verfahren zum aufbringen eines homogenen kunststoffmantels auf die innenwandung von rohren und vorrichtung zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
EP0033281A1 (de) 1981-08-05
US4377127A (en) 1983-03-22
FR2474351B1 (fr) 1985-05-31
JPS56121655A (en) 1981-09-24
SU1242001A3 (ru) 1986-06-30
DE3161903D1 (en) 1984-02-23
ATE5912T1 (de) 1984-02-15
BR8100473A (pt) 1981-08-18
FR2474351A1 (fr) 1981-07-31

Similar Documents

Publication Publication Date Title
EP0033281B1 (de) Vorrichtung zum Spritzen eines Wandbelages, insbesondere für eine Aushöhlung
US5096002A (en) Method and apparatus for enlarging an underground path
US10900286B2 (en) Apparatus and method for drilling generally horizontal underground boreholes
JPS62100321A (ja) 粒状材料の運搬システム
US20150376953A1 (en) Vertical-screw-auger conveyer feeder
CN102247011A (zh) 将烟草加工业的杆状物品从储藏匣运送到输送线中的装置和方法
JPS5814920B2 (ja) シ−ルドトンネル掘進装置
US3428363A (en) Gallery driving machine
US3905430A (en) Apparatus for raise drilling
JP2675275B2 (ja) 湿潤粘着性材料を空気搬送し噴射するための装置
US5257691A (en) Arrangement for transferring castable material without pipes from a feeding means to a destination
FR2513604A1 (fr) Procede et dispositif pour acheminer, de preference en continu, des matieres allant de l'etat pulverulent a l'etat de grains grossiers
FR2513309A1 (fr) Machine a bouclier pour forer des tunnels
US2749102A (en) Auger drill head
KR102639984B1 (ko) 분체 또는 입상체의 장거리 수송이 가능한 공기압 이송 장치
CN102713151A (zh) 包括流体进给的用于边坡开采的部件和设备
US2290809A (en) Dust spraying apparatus
JPH03158312A (ja) 垂直式輸送装置
FI109928B (fi) Menetelmä ja laite suolalietteen levittämiseksi
CN111620053A (zh) 矿用螺杆排渣器
EP0051544A1 (de) Anlage mit einem oder mehreren Aufnahmeköpfen für lose schlammartige, körnige, feuchte oder nichtfeuchte Massen
SU1678719A1 (ru) Метательное устройство
SU1015841A1 (ru) Центробежный метатель дл сыпучих материалов
CN207920613U (zh) 一种低功耗地铁盾构施工运料机
CH318676A (fr) Appareil destiné au transport de matières pulvérulentes

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

Designated state(s): AT BE DE GB IT LU

ITCL It: translation for ep claims filed

Representative=s name: BARZANO' E ZANARDO MILANO S.P.A.

TCAT At: translation of patent claims filed
17P Request for examination filed

Effective date: 19811008

DET De: translation of patent claims
ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE DE GB IT LU

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

Ref country code: LU

Payment date: 19840118

Year of fee payment: 4

REF Corresponds to:

Ref document number: 5912

Country of ref document: AT

Date of ref document: 19840215

Kind code of ref document: T

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

Ref country code: LU

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

Effective date: 19840131

REF Corresponds to:

Ref document number: 3161903

Country of ref document: DE

Date of ref document: 19840223

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: AT

Payment date: 19881222

Year of fee payment: 9

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

Ref country code: GB

Payment date: 19890127

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19890131

Year of fee payment: 9

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

Ref country code: GB

Effective date: 19900127

Ref country code: AT

Effective date: 19900127

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

Ref country code: BE

Effective date: 19900131

BERE Be: lapsed

Owner name: HOUILLERES DU BASSIN DE LORRAINE (ETABLISSEMENT P

Effective date: 19900131

GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910327

Year of fee payment: 11

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

Ref country code: DE

Effective date: 19921001