EP0123964B1 - Verfahren und Vorrichtung zum elektrostatischen Aufsprühen von Pulverteilchen auf eine zu beschichtende Oberfläche - Google Patents

Verfahren und Vorrichtung zum elektrostatischen Aufsprühen von Pulverteilchen auf eine zu beschichtende Oberfläche Download PDF

Info

Publication number
EP0123964B1
EP0123964B1 EP84103847A EP84103847A EP0123964B1 EP 0123964 B1 EP0123964 B1 EP 0123964B1 EP 84103847 A EP84103847 A EP 84103847A EP 84103847 A EP84103847 A EP 84103847A EP 0123964 B1 EP0123964 B1 EP 0123964B1
Authority
EP
European Patent Office
Prior art keywords
electrode
powder mixture
carrying gas
control air
gas stream
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
EP84103847A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0123964A1 (de
Inventor
Wolfgang Kirchner
Otto Gebhardt
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.)
Kopperschmidt-Muller GmbH and Co KG
Original Assignee
Kopperschmidt-Muller GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kopperschmidt-Muller GmbH and Co KG filed Critical Kopperschmidt-Muller GmbH and Co KG
Priority to AT84103847T priority Critical patent/ATE24848T1/de
Publication of EP0123964A1 publication Critical patent/EP0123964A1/de
Application granted granted Critical
Publication of EP0123964B1 publication Critical patent/EP0123964B1/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
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets
    • B05B1/262—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors
    • B05B1/265—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets with fixed deflectors the liquid or other fluent material being symmetrically deflected about the axis of the nozzle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
    • B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials

Definitions

  • the invention relates to a method for electrostatically spraying powder particles supplied in a conveying gas stream onto a surface to be coated with the features specified in the preamble of patent claim 1 and to a device for carrying out the method according to the preamble of claim 3.
  • the conveying gas powder mixture is guided past a deflection device, from which an air stream emerges radially.
  • the powder cloud can be shaped by regulating the radial air flow.
  • an electrode is provided inside the tube by means of the conveying gas powder mixture.
  • the invention has for its object to provide a method or device with which the spray cloud is better shaped and the powder particles are ionized in such a way that a more uniform coating of the workpiece surface can be achieved.
  • the ionized gas stream is fed separately from the control air stream, which is used to expand the conveying gas / powder mixture. Since the control air flow can be regulated in terms of pressure and quantity, the desired shape of the spray cloud can be set in a simple and advantageous manner.
  • the conveying gas / powder mixture is ionized by the ionized gas stream which is introduced into the conveying gas / powder mixture downstream of the control air flow.
  • the ionized gas flow is thus introduced into the conveying gas / powder mixture in a region of reduced flow velocity, namely downstream of the control air flow used for expansion and braking, so that the duration of action for ion accumulation on the powder particles is extended.
  • the arrangement of the electrode prevents a direct field effect on the surface to be coated.
  • the effect of the electric field emanating from the electrode on the surface to be coated is reduced.
  • the field line concentration of edges and protrusions of the surface to be coated is avoided, so that a more uniform coating can be achieved.
  • the ionized gas flow is also independent of the control air flow and is therefore optimally adjustable.
  • a direct charging of the conveying gas-powder mixture is also provided.
  • the electrostatic charging of the powder particles can be changed and optimally adjusted by regulating the direct charging and regulating the ionized gas flow.
  • Direct charging can be controlled either by changing the voltage applied to the electrode or by means of weakening the electric field. The easiest way to charge the ionized gas flow is to regulate the gas volume.
  • the housing of a spray device 10 is designated 11 and has a longitudinal bore 12, in which a tube 14 is arranged, which is extended beyond the front end face 15 of the housing 11 and consists of an electrically insulating material.
  • the conveying gas powder mixture is introduced on the rear side of the spray device, not shown, in a known manner into the annular channel 18 formed between the housing bore 12 and the pipe 14 and leaves the channel at the outlet nozzle 19 in a substantially axially directed flow.
  • an insert body 20 is arranged, which engages over the end of a further tube 21 arranged within the tube 14.
  • a gas stream is introduced, which is given a swirl by one or more helical grooves 23 on the outer circumference of the insert body 20 and then flows through an annular channel 24 between the insert body 20 and the tube 14.
  • the gas flow radially emerges from the annular channel 24 through a radial gap between the front end face 25 of the tube 14 and a radial shoulder 26 on the insert body out.
  • the insert body 20 is aligned with the outer diameter of the tube 14 and forms a front end extension of the tube within the cross section specified by the tube 14.
  • the control air emerging from the gap 25, 26 serves to brake and expand the conveying gas / powder mixture emerging from the outlet nozzle 19.
  • the desired shape of the powder cloud can be set very precisely by appropriate dimensioning of the control air.
  • a valve (not shown) in the control air supply line is used to measure the control air.
  • Another gas flow passes through a longitudinal bore 26 of the inner tube 21 and through a blind bore 29 and a plurality of radial bore 30 into a recess 31 in the end face of the insert body 20.
  • the end face 32 is hollow-conical.
  • a disc-shaped electrode 34 and an insulating material disc 35 are arranged in the recess 31 thus formed.
  • the electrode 34 is provided with a base 33 which is fastened in the insert body 20 by means of an insulating sleeve 36.
  • the base 33 carries an external thread, not shown, which is screwed to an internal thread, also not shown, of the sleeve 36, so that the width of the annular gap 38 formed between the end face 32 and the outer edge of the electrode 34 or the insulating material disc 35 can be adjusted exactly.
  • a supply line 39 for the electrical high voltage is led forward through the longitudinal bore 28 of the inner tube 21 and fastened to the base 33 at 40 in the bore 29.
  • the electrode 34 is a so-called semiconductor electrode, so it has a relatively high ohmic resistance.
  • the electrical resistance of the semiconductor electrode is so great that a shock discharge, that is to say a short circuit, is not possible on the outer edge of the disk-shaped electrode.
  • the diameter of the insulating material disk 35 is larger than that of the electrode 34, but smaller than the front diameter of the insert body 20. This greatly reduces the field strength and the field line concentration, which emanate from the outer edge of the electrode 34, and the undesired field effect between the electrode and Avoid edges or protrusions on the workpiece surface to be coated.
  • the gas stream emerging through the radial openings 30 is ionized by the high electrical potential of the electrode and strikes the conveying gas / powder mixture deflected by the control air emerging from the gap 25, 26 approximately in Range of the lowest flow speed, namely after its deceleration by the control air.
  • the powder particles entrained in the conveying gas stream are mixed uniformly with the highly ionized gas stream, the powder particles being electrostatically charged, which essentially takes place by the accumulation of gas ions.
  • the charging of the powder particles is favored by the ion accumulation from the gas stream and also by the residence time of the powder particles in the area of high ion concentration. According to the invention, a very uniform spray pattern of the powder cloud can be formed in this way, which leads to a uniform coating of the surface of an earthed workpiece.
  • the electrode 34 is also arranged so that it does not come into contact with the powder stream.
  • the strength of the charging of the powder particles can be optimized by regulating the gas flow through a valve, not shown.
  • the shape and charging of the spray cloud can be optimized by regulating the control air and the ionized gas flow.
  • a ring electrode 42 made of semiconducting material can be used, which is connected to high voltage in a manner not shown.
  • the ring electrode 42 faces the channel 18.
  • the ring electrode 42 serves for additional electrical charging of the conveying gas powder mixture.
  • a sleeve 43 made of insulating material is also axially displaceable, by means of which the effect of the electric field generated by the electrode 42 on the workpiece surface to be coated can be increased or decreased.
  • the voltage applied to the electrode 42 can also be changed. In this way, the precipitation effect of the field forces, which result on the one hand from the ionized gas stream and on the other hand from the additional electrode 42, can be coordinated with one another.
  • FIG. 2 shows a modified embodiment, in which the conveying gas-powder mixture flowing axially on the outer surface of the tube 14 is also expanded by the control air radially emerging from the gap between the surfaces 25 and 26.
  • a gas stream is guided through a longitudinal bore 26 of the inner tube 21 into a bore 46 in a nozzle body 47 and emerges evenly distributed through radial bores 4ß.
  • the gas flow is directed through the hollow cone-shaped end face 32 of the insert 20 approximately radially outward and directed onto the conveying gas powder mixture. This gas flow is ionized by a needle electrode 44 which extends into the bore 46 of the nozzle body 47.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP84103847A 1983-04-07 1984-04-06 Verfahren und Vorrichtung zum elektrostatischen Aufsprühen von Pulverteilchen auf eine zu beschichtende Oberfläche Expired EP0123964B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84103847T ATE24848T1 (de) 1983-04-07 1984-04-06 Verfahren und vorrichtung zum elektrostatischen aufspruehen von pulverteilchen auf eine zu beschichtende oberflaeche.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3312509 1983-04-07
DE3312509 1983-04-07
DE19843412694 DE3412694A1 (de) 1983-04-07 1984-04-04 Verfahren und vorrichtung zum elektrostatischen aufspruehen von pulverteilchen auf eine zu beschichtende oberflaeche
DE3412694 1984-04-04

Publications (2)

Publication Number Publication Date
EP0123964A1 EP0123964A1 (de) 1984-11-07
EP0123964B1 true EP0123964B1 (de) 1987-01-14

Family

ID=25809785

Family Applications (2)

Application Number Title Priority Date Filing Date
EP84103847A Expired EP0123964B1 (de) 1983-04-07 1984-04-06 Verfahren und Vorrichtung zum elektrostatischen Aufsprühen von Pulverteilchen auf eine zu beschichtende Oberfläche
EP84901348A Pending EP0144335A1 (de) 1983-04-07 1984-04-06 Verfahren und vorrichtung zum elektrostatischen aufsprühen von pulverteilchen auf eine zu beschichtende oberfläche

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP84901348A Pending EP0144335A1 (de) 1983-04-07 1984-04-06 Verfahren und vorrichtung zum elektrostatischen aufsprühen von pulverteilchen auf eine zu beschichtende oberfläche

Country Status (7)

Country Link
US (1) US4735360A (da)
EP (2) EP0123964B1 (da)
BR (1) BR8406511A (da)
DE (2) DE3412694A1 (da)
DK (1) DK159592C (da)
FI (1) FI76262C (da)
WO (1) WO1984003846A1 (da)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU580147B2 (en) * 1985-04-18 1989-01-05 Nordson Corporation Particle spray gun
JPH0675692B2 (ja) * 1985-05-16 1994-09-28 小野田セメント株式会社 静電粉体塗装方法及塗装装置
US4819879A (en) * 1985-10-25 1989-04-11 Nordson Corporation Particle spray gun
DE3601081A1 (de) * 1986-01-16 1987-07-23 Kopperschmidt Mueller & Co Elektrostatische spruehpistole, insbesondere fuer pulver
DE3608415A1 (de) * 1986-03-13 1987-09-24 Gema Ransburg Ag Elektrostatische sprueheinrichtung fuer beschichtungspulver
EP0236794B1 (de) * 1986-03-13 1991-01-02 ITW Gema AG Elektrostatische Sprüheinrichtung für Beschichtungspulver
DE3608426C3 (de) * 1986-03-13 1994-11-24 Gema Volstatic Ag Elektrostatische Sprüheinrichtung für Beschichtungspulver
DD271611A3 (de) * 1987-10-27 1989-09-13 Verkehrswesen Hochschule Spruehpistole mit elektrokinetischer pulveraufladung
JPH04327570A (ja) * 1991-02-12 1992-11-17 Hoechst Ag アルキルエーテルカルボン酸タウリド
DE19502522A1 (de) * 1995-01-27 1996-08-01 Gema Volstatic Ag Sprühvorrichtung für Beschichtungsmaterial
US6003785A (en) * 1997-05-27 1999-12-21 Sames Electrostatic, Inc. Composite material bell cup
US6004625A (en) * 1997-06-16 1999-12-21 Ibick Corporation Method for adhering particles to an object by supplying air ions
IL145464A0 (en) * 2001-09-16 2002-06-30 Pc Composites Ltd Electrostatic coater and method for forming prepregs therewith
DE10319916A1 (de) 2003-05-05 2004-11-25 Itw Gema Ag Sprühgerät für Beschichtungsmaterial, insbesondere Beschichtungspulver
DE102011055660B4 (de) 2011-11-23 2013-09-05 P+S Pulverbeschichtungs- Und Staubfilteranlagen Gmbh Verfahren zum Ausbringen von Pulver mittels einer Pulversprühpistole und Pulversprühpistole zur Durchführung des Verfahrens
US20160368008A1 (en) * 2015-01-12 2016-12-22 Ben-Why Liao Spray head structure slidably assembled with a nut
CN107262320B (zh) * 2017-06-26 2023-08-29 中信戴卡股份有限公司 一种混线式轮毂螺栓孔自动清粉系统及组合式清粉枪

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312363A1 (de) * 1972-03-13 1973-09-27 Atlas Copco Ab Elektrostatische pulverspritzpistole

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049092A (en) * 1959-07-24 1962-08-14 Interplanetary Res & Dev Corp Apparatus for the electrostatic coating of articles
NL133488C (da) * 1966-04-28
DE1284883B (de) * 1967-10-17 1968-12-05 Mueller Ernst Fa Verfahren und Vorrichtung zum Herstellen von UEberzuegen aus feinverteilten, fluessigen oder festen Stoffen
US3759151A (en) * 1971-09-21 1973-09-18 R Metz Inspection camera
JPS5145143A (en) * 1974-10-16 1976-04-17 Ransburg Japan Ltd Funshapataanno choseiga kanona funtaitosoyofunshanozuru
ES468633A1 (es) * 1978-04-07 1978-12-01 Rosal Vila Juan Mejoras introducidas en los aparatos para el recubrimiento con polvo electrostatico de objetos.
SE438966B (sv) * 1978-12-04 1985-05-28 Gema Ransburg Ag Sprutanordning for pulver, med i munstycksoppningen tangentiellt inledd spridningsgas
US4341347A (en) * 1980-05-05 1982-07-27 S. C. Johnson & Son, Inc. Electrostatic spraying of liquids
US4380320A (en) * 1981-02-25 1983-04-19 Nordson Corporation Electrostatic powder spray gun nozzle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312363A1 (de) * 1972-03-13 1973-09-27 Atlas Copco Ab Elektrostatische pulverspritzpistole

Also Published As

Publication number Publication date
DE3461991D1 (en) 1987-02-19
DK548484A (da) 1984-11-19
FI844560L (fi) 1984-11-21
EP0144335A1 (de) 1985-06-19
DK159592B (da) 1990-11-05
FI76262C (fi) 1988-10-10
DK548484D0 (da) 1984-11-19
BR8406511A (pt) 1985-03-12
US4735360A (en) 1988-04-05
DE3412694A1 (de) 1984-10-11
DK159592C (da) 1991-04-15
EP0123964A1 (de) 1984-11-07
WO1984003846A1 (fr) 1984-10-11
FI76262B (fi) 1988-06-30
FI844560A0 (fi) 1984-11-21

Similar Documents

Publication Publication Date Title
EP0123964B1 (de) Verfahren und Vorrichtung zum elektrostatischen Aufsprühen von Pulverteilchen auf eine zu beschichtende Oberfläche
DE2852038C2 (de) Vorrichtung zum elektrostatischen Versprühen und Auftragen eines flüssigen Überzugsmaterials
DE3851894T2 (de) Flache spritzdüse für eine spritzpistole.
DE3853075T2 (de) Spritzpistole für elektrostatisches pulver mit einstellbarem deflektor und elektrostatischem schirm.
EP0808663A2 (de) Elektrostatische Sprühvorrichtung
DE2908723A1 (de) Verfahren und vorrichtung zum elektrostatischen spruehen einer fluessigkeit
DE2539627A1 (de) Elektrostatische spritzpistole
DE1777329A1 (de) Vorrichtung zum elektrostatischen UEberziehen von Gegenstaenden
EP0314049A2 (de) Sprühpistole mit elektrokinetischer Aufladung von pulverförmigem Material
DE2422597A1 (de) Spritzvorrichtung
DE2541927A1 (de) Pulverzerstaeuberduese mit strahlverstellung
DE2549974A1 (de) Vorrichtung zum zerstaeuben von fliessfaehigen medien wie z.b. farben, lacken u.dgl.
DE19602802A1 (de) Elektrostatisches Ionisierungssystem
EP0037910B1 (de) Verfahren und Vorrichtung zum Zerstäuben von Pulver
EP0283747B1 (de) Elektrostatische Sprühpistole
EP0163118B1 (de) Sprühvorrichtung zum Beschichten von Gegenständen mit Pulver
EP0230624B2 (de) Elektrostatische Sprühpistole, insbesondere für Pulver
DD232595A3 (de) Vorrichtung zum elektrokinetischen aufladen von pulverfoermigen stoffen
DE2903148A1 (de) Vorrichtung fuer die beschichtung von gegenstaenden mit elektrostatisch aufgeladenem staub
DE2237717C3 (de) Mit Druckmittel betriebene Sprühpistole, z.B. Farbsprühpistole
DE2005830A1 (de) Verfahren und Vorrichtung zum Versprühen von Flüssigkeit
DE2121986C3 (de) Elektrostatische Spritzpistole
DE3310983A1 (de) Verfahren und vorrichtung zum aufspruehen von pulver auf gegenstaende, insbesondere zum elektrostatischen aufspruehen des pulvers zur herstellung von farbauflagen auf den gegenstaenden
DE2555547C3 (de) Vorrichtung zum elektrostatischen Auftragen bzw. Aufsprühen von Materialteilchen
DE3329880A1 (de) Verfahren zum spritzbeschichten ohne luft und spritzpistole fuer das beschichten ohne luft

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): IT

17P Request for examination filed

Effective date: 19850302

RBV Designated contracting states (corrected)

Designated state(s): VE BU DE

XX Miscellaneous (additional remarks)

Free format text: VERBUNDEN MIT 84901348.7/0144335 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) DURCH ENTSCHEIDUNG VOM 10.03.86.

17Q First examination report despatched

Effective date: 19860407

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

REF Corresponds to:

Ref document number: 24848

Country of ref document: AT

Date of ref document: 19870115

Kind code of ref document: T

XX Miscellaneous (additional remarks)

Free format text: VERBUNDEN MIT 84901348.7/0144335 (EUROPAEISCHE ANMELDENUMMER/VEROEFFENTLICHUNGSNUMMER) DURCH ENTSCHEIDUNG VOM 10.03.86.

REF Corresponds to:

Ref document number: 3461991

Country of ref document: DE

Date of ref document: 19870219

ET Fr: translation filed
ITF It: translation for a ep patent filed
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
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: GB

Payment date: 19940421

Year of fee payment: 11

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

Ref country code: SE

Payment date: 19940426

Year of fee payment: 11

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

Ref country code: DE

Payment date: 19940427

Year of fee payment: 11

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

Ref country code: CH

Payment date: 19940429

Year of fee payment: 11

Ref country code: AT

Payment date: 19940429

Year of fee payment: 11

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

Ref country code: NL

Payment date: 19940430

Year of fee payment: 11

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

Ref country code: BE

Payment date: 19940516

Year of fee payment: 11

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

Ref country code: FR

Payment date: 19940517

Year of fee payment: 11

EAL Se: european patent in force in sweden

Ref document number: 84103847.4

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

Ref country code: GB

Effective date: 19950406

Ref country code: AT

Effective date: 19950406

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

Ref country code: SE

Effective date: 19950407

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

Ref country code: LI

Effective date: 19950430

Ref country code: CH

Effective date: 19950430

Ref country code: BE

Effective date: 19950430

BERE Be: lapsed

Owner name: KOPPERSCHMIDT-MUELLER G.M.B.H. & CO K.G.

Effective date: 19950430

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

Ref country code: NL

Effective date: 19951101

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

Effective date: 19950406

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: FR

Effective date: 19951229

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19951101

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

Ref country code: DE

Effective date: 19960103

EUG Se: european patent has lapsed

Ref document number: 84103847.4

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST