EP0722810B1 - Federendenschleifmaschine - Google Patents

Federendenschleifmaschine Download PDF

Info

Publication number
EP0722810B1
EP0722810B1 EP95830546A EP95830546A EP0722810B1 EP 0722810 B1 EP0722810 B1 EP 0722810B1 EP 95830546 A EP95830546 A EP 95830546A EP 95830546 A EP95830546 A EP 95830546A EP 0722810 B1 EP0722810 B1 EP 0722810B1
Authority
EP
European Patent Office
Prior art keywords
grinding
supporting table
grinding machine
axis
mandrels
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
EP95830546A
Other languages
English (en)
French (fr)
Other versions
EP0722810A1 (de
Inventor
Ermenegildo Ragni
Gabriella Kunz
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.)
OMD OFFICINA MECCANICA DOMASO SpA
Original Assignee
OMD OFFICINA MECCANICA DOMASO 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 OMD OFFICINA MECCANICA DOMASO SpA filed Critical OMD OFFICINA MECCANICA DOMASO SpA
Publication of EP0722810A1 publication Critical patent/EP0722810A1/de
Application granted granted Critical
Publication of EP0722810B1 publication Critical patent/EP0722810B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
    • B24B7/167—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings end faces coil springs

Definitions

  • the present invention relates to a compression spring grinding machine, as per the preamble of claim 1.
  • a compression spring grinding machine as per the preamble of claim 1.
  • An example of such a machine is disclosed in DE 1 502 470 A.
  • the springs and, in particular, the springs provided for operating under compression are usually subjected, during the production thereof, to a grinding operation, for grinding the axial end portions of the spring so as to bring these axial end portions to lay on planes which are substantially perpendicular to the axis of the spring.
  • This grinding operation is conventionally performed by suitable grinding machines which comprises a grinding station, in which are arranged two opposite grinding wheels.
  • the springs to be ground are loaded into suitable seats provided in a loading disc, having an axis parallel to the axis of the grinding wheels, which is rotatably driven about the axis thereof, so as to progressively bring the springs between the grinding wheels, in order to be ground.
  • the grinding of the spring can be performed by a single passage between the grinding wheels, which are held at a set spacing from one another, or by successive passage of the springs between said grinding wheels, the latter being progressively displaced to one another.
  • the single-pass grinding operation which is preferred for springs made of a comparatively small diameter wire, is conventionally performed on grinding machines including a loading disc of large diameter, which is rotatively driven about the axis thereof with a suitably low speed.
  • the diameter of the grinding wheels is so selected that a given thickness of the wire and a given size of the spring can be ground by a single passage between the grinding wheels.
  • mandrels are rotatively driven about respective axes thereof, so as to cause the related loaded disc to turn, whereas to the supporting table is applied an intermittent rotary movement so as to bring, in turn, a loading disc to the grinding station and then to bring, by turning the related loading disc, the springs under the action of the grinding wheels, which are progressively displaced towards one another, during the several operating passages.
  • Such a machine, of the two loading disc type can not be used for performing a single-pass grinding operation, since the space for loading the loading disc to the grinding position thereof, is not sufficient.
  • the aim of the present invention is to solve the above disclosed problems by providing a grinding machine which is specifically designed to both perform the grinding of compression springs in a single pass and in several subsequent passages, and which, moreover, can use both large diameter loading discs and small diameter loading discs, so as to meet different use requirements, while providing a very high production yield.
  • a main object of the present invention is to provide such a compression spring grinding machine, which is very safe and flexible in operation and which, moreover, is very competitive from a mere economic standpoint.
  • the grinding machine according to an embodiment of the present invention, which has been generally indicated by the reference number 1, comprises a supporting table 2, having a substantially disc-like configuration, and having a vertical axis 2a.
  • the supporting table 2 in particular, is rotatably supported so as to turn about the axis 2a thereof, by a base 3, on which are arranged first driving means for driving said supporting table 2 with a rotary movement about the axis thereof, either continuous or intermittent, depending on requirements, as it will become more apparent hereinafter.
  • the first driving means comprises a motor-reducing unit 4, arranged on the supporting base 3 of the machine and coupled, by the output shaft thereof, to a main shaft 4, having an axis coinciding with the axis 2a, and its top end portion rigidly restrained to the supporting table 2.
  • the supporting table 2 With the supporting table 2 are associated at least two mandrels 5 and 6 which have vertical axes 5a and 6a and project from the two opposite surfaces or faces of the supporting table 2.
  • the machine further comprises a large diameter loading disc 7, which can be arranged on the loading face of the supporting table 2, or on the top face thereof, and which is provided with two holes 8 and 9, to allow those portions of the mandrels 5 and 6 projecting on the top from the loading face of the supporting table 2 to pass therethrough; on the large diamter loading disc 7, moreover, is provided a plurality of seats 10 in which can be arranged the compression springs to be ground.
  • the subject grinding machine further comprises at least two small diameter loading discs, indicated by 12 and 13, which have a diameter less than the diameter of the large diameter loading disc 7, and are arranged on the loading face of the supporting table 2.
  • the small diameter loading discs 12 and 13 are provided with respective central holes 14, 15, by means of which a respective small diameter loading disc is engaged, in a rotatively rigid manner, with the related mandrel 5 or 6.
  • the small diameter loading discs 12 and 13 are also provided with a plurality of seats or recesses 16, in which can be arranged the compression springs to be ground.
  • a grinding station 17 in which are provided two grinding wheels 18 and 19, having vertical axes, and arranged coaxially of one another; the two grinding wheels 18 and 19 are arranged oppositely facing the laying plane of the supporting table 2 and are driven, in a known manner, with a rotary movement about their axes 20, by a motor-reducing driving unit.
  • At least one of the grinding wheels 18 and 19 can be controllably displaced along the related axis 20, so as to change the mutual spacing of the grinding wheel depending on the grinding requirements.
  • the mandrels 5 and 6 are rotatable supported, about their respective axes 5a and 6a, by the supporting table 2; moreover, second driving means are provided, for rotatively driving the mandrels 5 and 6, at least when the respective small diameter loading disc 12 or 13, is arranged at the grinding station 17.
  • the second driving means comprise a motor-reducing unit or assembly 21, which is arranged under the supporting disc 2 and is provided with an output shaft, which can be either connected to, or disconnected from, one of the mandrels, 5 or 6, as the latter is arranged near the grinding station 17.
  • a half clutch 22 for example a toothed half-clutch, which can be coupled to a further half-clutch 23, in turn connected to the bottom end portions of the mandrels 5 and 6.
  • the grinding machine according to an embodiment of the present invention operates as follows.
  • the large diameter loading disc 2 thereon are arranged the compression spring to be ground; the grinding wheels 18 and 19 are set at a proper spacing from one another, so as to perform the grinding operation by a single-passage.
  • the motor reducing unit 4 is so operated as to cause the supporting table 2 and, accordingly, the loading disc 7, to be turned with a small speed, to bring progressively the compression springs arranged on the loading disc 7 under the action of the grinding wheels 18 and 19 which will grind, by a single passage, both the end portions of the compression springs, projecting from the two faces of the loading disc 7.
  • the two small diameter loading discs 12 and 13 In order to grind the compression springs in several passages between the grinding wheels 18 and 19, on the supporting table 2 are mounted the two small diameter loading discs 12 and 13, and on these loading discs 12 and 13 are arranged the compression springs to be ground.
  • the motor-reducing unit 4 is so operated as to cause the supporting table 2 to be reciprocately turned, or intermittently turned, through 180°, so as to respectively locate a smaller or minor loading disc, 12 or 13, at the grinding station 17.
  • the half-clutch 23 of one of the mandrels, 5 or 6, will be arranged at the half-clutch 22, mounted on the output shaft 21a of the motor-reducing unit 21.
  • the two half-clutches 22 and 23 will be connected to one another, and the motor-reducing unit 21 will be operated so as to progressively bring the compression springs provided on the small diameter loading disc 12 or 13, arranged at the grinding station 17, between the grinding wheels 18 and 19.
  • the grinding of the springs arranged on the loading discs 12 and 13 is performed through several passages or operations, by suitably changing the distance of the grinding wheels 18 and 19, for each subsequent working operation, to the end of the grinding processing of the springs.
  • a high yield grinding machine which is specifically designed for grinding compression springs, either by a single path, or by several subsequent passes, by varying the mutual spacing of the grinding wheels, while using a single large diameter loading disc, or a plurality of small diameter smaller discs.
  • the used materials, as well as the contingent size and shapes can be any, depending on requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (6)

  1. Eine vielseitig einsetzbare Druckfederschleifmaschine, wobei diese Schleifmaschine folgendes umfaßt: Einen scheibenförmigen Tragtisch (2), der um seine vertikale Achse (2a) drehen kann; eine Schleifstation (17), die ein Paar von Schleifscheiben (18, 19) einschließt, die entgegengesetzt zur Ebene dieses Tragtisches (2) stehen und zum Schleifen dieser Federn bereitgestellt sind, die von diesem Tragtisch (2) zu dieser Schleifstation (17) transportiert werden; dadurch gekennzeichnet, daß die Maschine sowohl einen Schleifvorgang in einem einzigen Schritt als auch Schleifvorgänge in mehreren Schritten durchführen kann, und daß diese Schleifmaschine ferner eine erste Antriebsvorrichtung (4) für den drehbaren Antrieb dieses Tragtisches (2) entweder mit einer kontinuierlichen oder einer intermittierenden Bewegung um dessen Achse (2a) umfaßt; mindestens zwei Spindeln (5, 6), deren Achsen parallel zur Achse (2a) des Tragtisches (2) verlaufen und die von diesem Tragtisch (2) drehbar um ihre jeweiligen Achsen (5a, 6a) getragen werden und von dessen oberer Fläche abstehen und in einem Winkelabstand um die Achse (2a) dieses Tragtisches (2) angeordnet sind; eine Federladescheibe (7) mit großem Durchmesser, die zum Schleifen dieser Federn in diesem Schleifvorgang in einem einzigen Schritt bereitgestellt ist, wobei diese Scheibe (7) koaxial auf der oberen Fläche des Tragtisches (2) angebracht werden kann; mindestens zwei Federladescheiben (12, 13) geringen Durchmessers, die einen geringeren Durchmesser als diese Federladescheibe (7) mit großem Durchmesser besitzen, wobei diese Federladescheiben (12, 13) mit geringem Durchmesser dazu bereitgestellt sind, auf dieser oberen Fläche dieses Tragtisches (2) koaxial zu diesen Spindeln (5, 6) als Alternative zu dieser Federladescheibe (7) mit großem Durchmesser angebracht zu werden, wenn diese Federn mit diesem Schleifvorgang in mehreren Durchgängen geschliffen werden sollen; und eine zweite Antriebsvorrichtung (22), um diese Ladescheiben (12, 13) mit kleinem Durchmesser um die Achse (5a, 6a) einer zugehörigen Spindel (5, 6) zumindest bei dieser Schleifstation (17) in Drehung zu versetzen.
  2. Eine Schleifmaschine nach Anspruch 1, dadurch gekennzeichnet, daß diese erste Antriebsvorrichtung (4) eine erste Untersetzungsmotoreinheit umfaßt, die auf einem Sockel (3) dieser Maschine untergebracht ist, der diesen Tragtisch (2) drehbar trägt; wobei diese erste Untersetzungsmotoreinheit (4) eine Abtriebswelle besitzt, die an einer vertikalen Welle angeschlossen ist, die ihrerseits koaxial mit diesem Tragtisch (2) verbunden ist.
  3. Eine Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß diese zweite Antriebsvorrichtung (21) eine zweite Untersetzungsmotoreinheit (21) umfaßt, die am unteren Ende dieses Tragtisches (2) in der Nähe dieser Schleifstation (17) angebracht ist; wobei diese zweite Untersetzungsmotoreinheit (21) eine Eingriffsvorrichtung umfaßt, die gesteuert betätigt oder freigegeben werden kann, um drehbar eine dieser Spindeln (5, 6), die sich bei dieser Schleifstation (17) befinden, um ihre Drehachse anzutreiben.
  4. Eine Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß diese Eingriffsvorrichtung (22) eine Kupplungsklaue (23) umfaßt, die auf der Abtriebswelle dieser zweiten Untersetzungsmotoreinheit angebracht und bereitgestellt ist, um die unteren Endbereiche der Spindeln (5, 6), die vom Boden dieses Tragtisches (2) hervorstehen und eine weitere Kupplungsklaue (23) tragen, zu ergreifen oder sich davon zu lösen, wenn eine dieser Spindeln (5, 6) mit der Abtriebswelle der zweiten Untersetzungsmotoreinheit (21) verbunden ist.
  5. Eine Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß diese Schleifscheiben (18, 19) koaxial entlang einer vertikalen Achse angeordnet sind, wobei ferner eine Antriebsvorrichtung bereitgestellt ist, um diese Schleifscheiben aufeinander zu oder voneinander weg zu bewegen.
  6. Eine Schleifmaschine nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß diese Federladescheiben (7, 12, 13) mit einer Vielzahl von Vertiefungen (16) ausgestattet sind, um diese zu schleifenden Druckfedern aufzunehmen.
EP95830546A 1995-01-19 1995-12-29 Federendenschleifmaschine Expired - Lifetime EP0722810B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI950082 1995-01-19
ITMI950082A IT1273433B (it) 1995-01-19 1995-01-19 Macchina rettificatrice per molle a compressione,ad elevata versatilita' di impiego

Publications (2)

Publication Number Publication Date
EP0722810A1 EP0722810A1 (de) 1996-07-24
EP0722810B1 true EP0722810B1 (de) 1999-04-07

Family

ID=11370251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95830546A Expired - Lifetime EP0722810B1 (de) 1995-01-19 1995-12-29 Federendenschleifmaschine

Country Status (3)

Country Link
EP (1) EP0722810B1 (de)
DE (1) DE69508907T2 (de)
IT (1) IT1273433B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012201465A1 (de) 2012-02-01 2013-08-01 Wafios Ag Verfahren zum Schleifen von Federenden und Federendenschleifmaschine
DE102012203617A1 (de) 2012-03-07 2013-09-12 Wafios Ag Federendenschleifmaschine mit mehreren Ladetellern
DE102013211201A1 (de) 2013-06-14 2014-12-31 Wafios Ag Verfahren zum Schleifen von Federenden und Federendenschleifmaschine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPN20030064A1 (it) * 2003-09-26 2005-03-27 Ka Ma Srl Macchina rettificatrice per molle a spirale e relativo procedimento.
ITPN20040027A1 (it) * 2004-04-23 2004-07-23 Ka Ma Srl Macchina rettificatrice perfezionata per molle a spirale
CN102490096A (zh) * 2011-11-11 2012-06-13 绍兴市家度弹簧机械有限公司 立式磨床的下磨头托盘结构
JP6309585B2 (ja) * 2016-08-31 2018-04-11 旭精機工業株式会社 研削装置
JP6335994B2 (ja) * 2016-09-27 2018-05-30 旭精機工業株式会社 研削装置
EP4234162A1 (de) * 2018-07-16 2023-08-30 OFFICINA MECCANICA DOMASO S.p.A. Federendenschleifmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353975A (fr) * 1963-04-23 1964-02-28 Machine à meuler simultanément les deux extrémités de ressorts à boudin
CH412612A (de) * 1964-07-29 1966-04-30 Kunz Beck Emil Schleifmaschine
GB1233039A (de) * 1967-12-15 1971-05-26
GB1207757A (en) * 1967-12-15 1970-10-07 Karl Hack Kommanditgesellschaf A spring-end grinding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012201465A1 (de) 2012-02-01 2013-08-01 Wafios Ag Verfahren zum Schleifen von Federenden und Federendenschleifmaschine
WO2013113628A1 (de) 2012-02-01 2013-08-08 Wafios Ag Verfahren zum schleifen von federenden und federendenschleifmaschine
DE102012203617A1 (de) 2012-03-07 2013-09-12 Wafios Ag Federendenschleifmaschine mit mehreren Ladetellern
WO2013131786A1 (de) 2012-03-07 2013-09-12 Wafios Ag Federendenschleifmaschine mit drehtisch und mehreren ladetellern
DE102013211201A1 (de) 2013-06-14 2014-12-31 Wafios Ag Verfahren zum Schleifen von Federenden und Federendenschleifmaschine

Also Published As

Publication number Publication date
ITMI950082A0 (it) 1995-01-19
DE69508907D1 (de) 1999-05-12
EP0722810A1 (de) 1996-07-24
DE69508907T2 (de) 1999-08-26
IT1273433B (it) 1997-07-08
ITMI950082A1 (it) 1996-07-19

Similar Documents

Publication Publication Date Title
EP0722810B1 (de) Federendenschleifmaschine
SU484667A3 (ru) Многошпиндельный токарный станок
JPS6268268A (ja) ジヤイロ研磨機用工作物軸の駆動装置
US5882247A (en) Machine for grinding of optical glasses
US4439951A (en) Grinding machine
KR101701701B1 (ko) 콘크리트 폴리싱 로봇용 툴 중첩배열방식 그라인딩 장치
US5697831A (en) Machine tool with plural tool spindles
US4534133A (en) Machine for superfinishing annular workpieces
US3376672A (en) Abrading machine with a plurality of abrasive wheels
CA1114171A (en) Centreless valve grinding
US4922595A (en) Turret head unit
US3134998A (en) Edge trimming and finishing machine
US4428160A (en) Centerless valve grinding
US4007559A (en) Machine for reproducing an article from a pattern
US2348052A (en) Lathe
US835320A (en) Universal work-holder for polishing-machines.
EP0313369A3 (de) Poliermaschine für einen Edelstein
US4218800A (en) Planetary grinder and polisher
US2784649A (en) Machine tool for the production of blades of centrifugal machines
US4553885A (en) Apparatus for the initial and improvement machining of active surface of steer cams, particularly of brake spanners
US3299582A (en) Crankshaft-simulating dresser
SU92105A1 (ru) Автоматический станок дл обдирки наждачным кругом внутренних цилиндрических поверхностей кольцевых заготовок
JP2684329B2 (ja) 角度方向及び縦方向に運動するダイヤモンドツールホルダー用の単一モーター駆動装置
JP4250594B2 (ja) 遊星ギヤ機構を用いた移動装置及び平面研磨機
US3375613A (en) Machine for grinding parts according to a jig contour

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): BE CH DE ES FR GB IT LI SE

17P Request for examination filed

Effective date: 19961111

17Q First examination report despatched

Effective date: 19970702

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

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

ITF It: translation for a ep patent filed

Owner name: DOTT. FRANCO CICOGNA

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990407

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990407

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990407

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69508907

Country of ref document: DE

Date of ref document: 19990512

ET Fr: translation filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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: 19991229

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

Effective date: 19991229

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

Ref country code: IT

Payment date: 20141216

Year of fee payment: 20

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

Ref country code: DE

Payment date: 20150129

Year of fee payment: 20

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

Ref country code: FR

Payment date: 20141224

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69508907

Country of ref document: DE