EP0179452B1 - Procédé de fabrication de têtes d'impression pour mécanisme d'impression à encre - Google Patents

Procédé de fabrication de têtes d'impression pour mécanisme d'impression à encre Download PDF

Info

Publication number
EP0179452B1
EP0179452B1 EP85113417A EP85113417A EP0179452B1 EP 0179452 B1 EP0179452 B1 EP 0179452B1 EP 85113417 A EP85113417 A EP 85113417A EP 85113417 A EP85113417 A EP 85113417A EP 0179452 B1 EP0179452 B1 EP 0179452B1
Authority
EP
European Patent Office
Prior art keywords
ink
photoplastic
films
process according
film
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
EP85113417A
Other languages
German (de)
English (en)
Other versions
EP0179452A3 (en
EP0179452A2 (fr
Inventor
Ferdinand Dr. Quella
Hans Ing. Grad. Hadersbeck
Ernst Dipl.-Ing. Goepel
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0179452A2 publication Critical patent/EP0179452A2/fr
Publication of EP0179452A3 publication Critical patent/EP0179452A3/de
Application granted granted Critical
Publication of EP0179452B1 publication Critical patent/EP0179452B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/16—Production of nozzles
    • B41J2/1621—Manufacturing processes
    • B41J2/1631—Manufacturing processes photolithography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/16—Production of nozzles
    • B41J2/1607—Production of print heads with piezoelectric elements
    • B41J2/161—Production of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14379—Edge shooter

Definitions

  • the invention relates to a method for producing a printhead according to the preamble of patent claim 1.
  • a preassembled unit which consists of shaped needles and the drive elements for droplet ejection and the contacting devices for the drive elements, is placed in an injection or casting mold and cast. After removing the shaping needles, the ink channels are formed in the head part. This procedure requires a very precise pre-assembly, which has to be carried out largely manually. In order to ensure a desired completely smooth surface inside the ink channels, the removal of the shaping needles must be carried out with great care.
  • the advantages associated with the method according to the invention consist essentially in an improvement in the formation of ink channels with regard to their fine structure.
  • the method opens up the possibility of low manufacturing costs, e.g. to also form ink channels with a changing cross section, that is to say, for example, to create an ink print head in which the ink channels taper in the direction of the outlet opening.
  • a thin plastic coating 2 is applied to a carrier 1, which serves essentially as a protective layer and as an adhesive between the carrier material and the ink contained in the interior of the ink print head (FIG. 1a).
  • the carrier 1 consists of metal or plastic, for example a polybutylene compound.
  • Favorable results are achieved with a carrier which has a thickness of approximately 0.2 to 1 mm and an area of approximately 5 ⁇ 10 cm.
  • a layer in the form of a photoplastic film 3 is then applied to the carrier 1 in a first lamination process. This is covered with a mask 4 and irradiated with UV light.
  • the mask 4 has a translucent area 5 of a certain contour (FIG. 1 b).
  • chemically detachable film segments are formed in the areas 6 of the photoplastic film 3 determined by the area 5 of the mask 4 (FIG. 1c).
  • the free surface of the photoplastic film 3 is passivated, which is done, for example, by means of a light-absorbing fat substance solution or toner powder.
  • the passivation can also be restricted to a part of the free area by a suitable covering. The passivation prevents a later double exposure of the already treated photoplastic film 3.
  • a second photoplastic film 7 is then applied in a further lamination process, covered with a mask 8 and exposed (FIG. 1d).
  • the mask 8 in turn has a translucent area 9 of a certain contour, through which a certain segment 10 of the photoplastic film 7 corresponding to this contour is exposed.
  • an area is created in the second photoplastic film 7, namely the film segment 10, which can be removed by chemical treatment.
  • the area 9 of the mask 8 (FIG. 1d) and thus also the film segment 10 (FIG. 1e) is both in terms of its length and in terms of its width from the area 5 of the mask 4 (FIG. 1b) or the film segment 6 in the photoplastic film 3 (Fig. 1 c) different.
  • the construction of a three-dimensional structure of an ink channel is thus possible.
  • the exposed free surface of the photoplastic film 7 is then passivated again after the mask 8 has been removed.
  • Photochemical treatment of the exposed photoplastic films can take place either after each lamination process or after a number of successive lamination processes. In the schematic example shown in FIG. 1, the photochemical treatment takes place after the second lamination process.
  • the detachable film segments of the photoplastic films 3 and 7 are developed (FIG. 1f). It is a known photolithographic process. The described lamination, masking, exposure and passivation processes are then repeated several times, with development and thus exposure of the detachable film segments of the individual photoplastic films taking place after each or after several of these processes.
  • an ink channel of an ink print head constructed according to the described method is shown.
  • 2 shows the area 12 provided as an ink chamber, the ink channel 13 and the outlet opening 14.
  • the areas 12, 13 and 14 are filled with ink during the operation of an ink print head.
  • the ink print head works according to the so-called vacuum process. This means that what is shown here is the ink supply from an ink reservoir, which is arranged at a lower level than the outlet openings of the ink channels.
  • a pulse-controllable converter 15 which e.g.
  • a piezo tube or as a piezo plate pressure waves are known to be generated in the interior of the ink chamber 12, which spread out at both sides at the speed of sound and cause the ejection of a small amount of ink in the form of an ink droplet at the nozzle outlet opening 14.
  • the ink channel 13, which tapers in the direction of the outlet opening 14, and the outlet opening 14 are formed in accordance with the method according to the invention by the lamination processes described. It can be seen from FIG. 2, which shows the arrangement in a sectional view, that the ink channel 13 narrows in height. 3, which shows the arrangement in top view, it can be seen that at the same time the width of the ink channel 13 is increasingly decreasing.
  • a cover film 16 is provided, which can be provided with a protective layer 17 to protect against direct ink contact.
  • the structure of the regions 12, 13 and 14 is formed by eight photoplastic films 18 to 25. Since photoplastic films are available in a thickness of approximately 10 11 to 50 .mu.m, an ink channel of up to 400 .mu.m thick can be produced when using 8 photoplastic films.
  • a writing head with a double row of ink channels can be produced by joining two writing head units.
  • the supply of the ink channels in the two print head units can be e.g. through an opening in the cover film.
  • the cover and the vacuum process ensure that the entire print head is sealed. If necessary, what is not shown in detail here, an additional one can also be provided to cover the outlet openings, e.g. Prevents ink from spilling during transportation.
  • the edges of the write head can also be shaped in the manner described. This is particularly advantageous if the exit openings are very thin capillaries and / or if a write head with several rows of exit openings is created. This avoids the roughness associated with a simple cutting process in the area of the outlet openings.
  • FIGS. 2 and 3 The embodiment shown in FIGS. 2 and 3 is based on the use of eight photoplastic films, each with the same thickness.
  • the method according to the invention makes it easy to use a larger or a smaller number of photoplastic films than that provided in the exemplary embodiment.
  • the photoplastic films can also have individually different thicknesses.
  • This and the use of appropriately designed masks make it possible to produce a very precise and very finely graduated three-dimensional structure of the ink channels and the outlet openings. The effort required for this is not significant since the method according to the invention enables a very high degree of automation. Since the method according to the invention can be used to build and form a large number of such structures in one operation on a carrier, the method is particularly suitable for the production of multi-nozzle writing heads. In this case, the precision with which the desired structures can be produced has a particularly advantageous effect.
  • An exemplary embodiment is shown in FIG.
  • the part of a print head shown there is constructed from eight photoplastic films 18 to 25, which are laminated in succession in the manner described.
  • the invention is not limited to the formation of the ink channels and the outlet openings of a write head. Rather, the ink chamber and the ink supply part with which the ink chamber is connected at the end opposite the outlet openings can also be formed.
  • the invention is also not limited to the fact that the photolithographic processes with which the exposed film segments are removed are carried out using the so-called positive technique, as has been described with reference to the exemplary embodiments. Rather, the so-called negative technique can be used with the same advantages. In this case, it is only necessary to use photoplastic films which form so-called cross-linked film segments when exposed, that is, in which the exposed film segments become insoluble. With appropriately designed masks, the method can also be carried out in the manner described in this case.
  • the ink chamber 12 and part of the ink channels 13 are produced in a manner known per se using the injection molding process. Only the parts of the ink channels 13 to which particularly high demands are made and the outlet openings 14 are produced according to the method according to the invention.
  • several photoplastic films, in the example the photoplastic films 27 and 28 are applied to the injection molded plastic part 26 one after the other and treated in the manner described. The arrangement is in turn covered at the top by the coated metal foil 16, 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (10)

1. Procédé pour fabriquer une tête d'impression pour des dispositifs d'enregistrement à encre, comportant au moins une chambre qui reçoit au moins une encre, est reliée à la partie d'alimentation de l'encre et débouche, par l'intermédiaire d'un canal d'adduction de l'encre, dans une ouverture de sortie, à partir de laquelle l'éjection de l'encre sous la forme de gouttelettes est réalisée sous l'action d'un élément transducteur, et selon lequel on dépose sur un élément de support une masse photosensible, dans laquelle on ménage des zones conformément à un modèle déterminé et on les traite par voie photochimique, caractérisé par le fait qu'on dépose la masse photosensible sous la forme de plusieurs feuilles de matière plastique photosensible (3, 7; 18 à 25; 27, 28) sur l'élément de support (1) au cours d'opérations successives de stratification, qu'entre les différentes opérations de stratification on met en oeuvre les masquages respectifs, les différents masques (4, 8) possédant chacun une zone transparente (5, 9) pouvant être déterminée individuellement pour l'opération considérée de stratification, ce qui a pour effet que sur la feuille de matière plastique photosensible considérée (3, 7; 18 à 25; 27, 28), on détermine par exposition un segment de feuille (6, 10), qui correspond à cette zone (5, 9), par un traitement photochimique, et que le traitement photochimique servant à éliminer les segments de feuille (6, 10) intervient après chaque opération de stratification ou après plusieurs opérations de stratification.
2. Procédé suivant la revendication 1, caractérisé par le fait qu'après une opération de stratification, on soumet les feuilles de matière plastique photosensible (3, 7; 18 à 25; 27, 28) à un traitement de passivation au moyen d'une solution de colorant absorbant la lumière.
3. Procédé suivant la revendication 1, caractérisé par le fait qu'on utilise des feuilles de matière plastique photosensible possédant respectivement la même épaisseur (50 µ) ou des épaisseurs différentes (10 à 50 µ).
4. Procédé suivant les revendications 1 à 3, caractérisé par le fait qu'on dépose les feuilles de matière plastique photosensible (3, 4; 18 à 25) sur la surface plane de l'élément de support (1 ), au cours d'opérations successives de stratification et qu'on forme les canaux d'adduction d'encre (13) au moyen des segments de feuille (6, 10) éliminés.
5. Procédé suivant la revendication 4, caractérisé par le fait qu'on utilise un nombre de masques (4, 8) correspondant au nombre des opérations de stratification, que les zones transparente (5, 9) des différents masques (4, 8) possèdent des dimensions respectives différentes et que, lorsque l'épaisseur de couche de la structure augmente, on obtient, par élimination des segments correspondants dans les différentes feuilles de matière plastique photosensibles, une forme variant dans trois dimensions et constituant les différents canaux d'adduction d'encre (13).
6.Procédé suivant la revendication 5, caractérisé par le fait que la dimension, comptée dans la direction longitudinale du canal d'adduction d'encre (13), des zones transparentes (5, 9), des masques (4, 8) augmente également lorsque l'épaisseur de couche de la structure augmente, tandis que leur largeur diminue, et que cette variation des dimensions est telle que les évidements forment un canal d'adduction d'encre (13) qui se rétrécit en direction de l'ouverture d'entrée (14).
7. Procédé suivant les revendications 1 à 3, caractérisé par le fait qu'on dépose les feuilles de matière plastique photosensible (27, 28 sur la figure 5) au cours d'opérations successives de stratification, sur un élément en matière plastique (26 sur la figure 6), qui possède un évidement formant le canal d'adduction d'encre (13), et que seule la partie du canal d'adduction d'encre (13), qui est située dans la zone de l'ouverture de sortie (14), et/ou l'ouverture de sortie (14) elle-même est formée par les évidements ménagés dans les feuilles de matière plastique photosensible (27, 28).
8. Procédé suivant l'une des revendications 1 à 7, caractérisé par le fait qu'en dehors des canaux d'adduction d'encre (13) et/ou des ouvertures de sortie (14), on forme également les bords de la tête d'enregistrement en éliminant des segments correspondants des feuilles de matière plastique photosensible.
9. Procédé suivant l'une des revendications 1 à 8, caractérisé par le fait que le traitement des feuilles de matière plastique photosensible est réalisé selon la technique dite en négatif.
10. Procédé selon l'une des revendications 1 à 8, caractérisé par le fait qu'on réalise le traitement des feuilles de matière plastique photosensible selon la technique dite en positif.
EP85113417A 1984-10-25 1985-10-22 Procédé de fabrication de têtes d'impression pour mécanisme d'impression à encre Expired EP0179452B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3439125 1984-10-25
DE3439125 1984-10-25

Publications (3)

Publication Number Publication Date
EP0179452A2 EP0179452A2 (fr) 1986-04-30
EP0179452A3 EP0179452A3 (en) 1987-03-04
EP0179452B1 true EP0179452B1 (fr) 1988-12-28

Family

ID=6248764

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113417A Expired EP0179452B1 (fr) 1984-10-25 1985-10-22 Procédé de fabrication de têtes d'impression pour mécanisme d'impression à encre

Country Status (4)

Country Link
US (1) US4727012A (fr)
EP (1) EP0179452B1 (fr)
JP (1) JPS61106260A (fr)
DE (1) DE3566980D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69127801T2 (de) * 1990-12-19 1998-02-05 Canon Kk Herstellungsverfahren für flüssigkeitsausströmenden Aufzeichnungskopf
JP2781466B2 (ja) * 1990-12-19 1998-07-30 キヤノン株式会社 液体噴射記録ヘッド、その製造方法、及び液体噴射記録ヘッドを備えた記録装置
JPH0577423A (ja) * 1991-09-24 1993-03-30 Canon Inc インクジエツト記録ヘツド
US5255022A (en) * 1992-04-02 1993-10-19 Xerox Corporation Ink manifold having elastomer channel plate for ink jet printhead and process for making
JP2960608B2 (ja) * 1992-06-04 1999-10-12 キヤノン株式会社 液体噴射記録ヘッドの製造方法
US5980026A (en) * 1995-06-14 1999-11-09 Canon Kabushiki Kaisha Process for production of ink jet head
US5901425A (en) 1996-08-27 1999-05-11 Topaz Technologies Inc. Inkjet print head apparatus
US6644789B1 (en) 2000-07-06 2003-11-11 Lexmark International, Inc. Nozzle assembly for an ink jet printer
US6684504B2 (en) * 2001-04-09 2004-02-03 Lexmark International, Inc. Method of manufacturing an imageable support matrix for printhead nozzle plates

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4158847A (en) * 1975-09-09 1979-06-19 Siemens Aktiengesellschaft Piezoelectric operated printer head for ink-operated mosaic printer units
US4096626A (en) * 1976-12-27 1978-06-27 International Business Machines Corporation Method of making multi-layer photosensitive glass ceramic charge plate
JPS5658877A (en) * 1979-10-18 1981-05-22 Seiko Epson Corp Ink jet head
US4417251A (en) * 1980-03-06 1983-11-22 Canon Kabushiki Kaisha Ink jet head
JPS56150561A (en) * 1980-04-25 1981-11-21 Oki Electric Ind Co Ltd Manufacture of fluid injection nozzle
JPS5787956A (en) * 1980-11-21 1982-06-01 Fujitsu Ltd Ink jet heat and manufacture thereof
JPS5793162A (en) * 1980-12-03 1982-06-10 Fujitsu Ltd Manufacture of ink jet head
AT372651B (de) * 1980-12-15 1983-11-10 Philips Nv Tintenstrahlschreibkopf und verfahren zur herstellung eines solchen tintenstrahlschreibkopfes
JPS57102366A (en) * 1980-12-18 1982-06-25 Canon Inc Ink jet head
JPS57105359A (en) * 1980-12-24 1982-06-30 Fujitsu Ltd Ink jetting print head
JPS57208252A (en) * 1981-06-19 1982-12-21 Canon Inc Preparation of ink jet head
DE3104077A1 (de) * 1981-02-06 1982-09-09 Philips Patentverwaltung Gmbh, 2000 Hamburg "schreibkopf fuer tintenstrahldrucker"
US4392145A (en) * 1981-03-02 1983-07-05 Exxon Research And Engineering Co. Multi-layer ink jet apparatus
US4450455A (en) * 1981-06-18 1984-05-22 Canon Kabushiki Kaisha Ink jet head
US4437100A (en) * 1981-06-18 1984-03-13 Canon Kabushiki Kaisha Ink-jet head and method for production thereof
JPS5869068A (ja) * 1981-10-20 1983-04-25 Ricoh Co Ltd インクジエツト記録装置

Also Published As

Publication number Publication date
EP0179452A3 (en) 1987-03-04
JPS61106260A (ja) 1986-05-24
US4727012A (en) 1988-02-23
DE3566980D1 (en) 1989-02-02
EP0179452A2 (fr) 1986-04-30

Similar Documents

Publication Publication Date Title
DE3222680C2 (de) Tintenstrahlkopf und Verfahren zu seiner Herstellung
DE3150109C2 (fr)
DE3321308C2 (fr)
DE3546063C2 (fr)
DE60313230T2 (de) Tintenstrahldruckkopf
DE69935179T2 (de) Strukturierungstechnik unter Verwendung eines Templates und Tintenstrahlsystems
DE3200388C2 (fr)
EP0648607B1 (fr) Module de tête à jet d'encre pour tête à jet d'encre éjectant de face et procédé pour sa fabrication
DE2543451C2 (de) Piezoelektrisch betriebener Schreibkopf für Tintenmosaikschreibeinrichtungen
DE69636021T2 (de) Tintenstrahldruckkopf und Verfahren zu seiner Herstellung
DE3248087A1 (de) Fluessigkeitsstrahlkopf
DE4406224C2 (de) Verfahren zur Oberflächenbehandlung einer Düsenplatte
DE3142697A1 (de) Verfahren zur herstellung einer duesenplatte fuer einen tintenstrahlschreibkopf
DE69826428T2 (de) Druckkopfspannungsentlastung
EP0179452B1 (fr) Procédé de fabrication de têtes d'impression pour mécanisme d'impression à encre
DE3414792A1 (de) Verfahren zur herstellung eines fluessigkeitsstrahl-schreibkopfes
DE3414527C2 (de) Flüssigkeitsstrahlaufzeichnungskopf
DE2350026A1 (de) Verfahren zur herstellung einer vielfach-elektrodeanordnung fuer aufzeichnungsgeraete
DE69931578T2 (de) Anordnung einer Düsenplatte für eine Mikrospritzvorrichtung und Verfahren zur Herstellung derselben
DE60319271T2 (de) Tintenstrahldruckkopf und verfahren zu seiner herstellung
DE19917595B4 (de) Verfahren zum Herstellen eines Tintendruckkopf-Chips sowie dessen Tintendurchlaßkanal-Struktur
EP0671270A2 (fr) Tête d'impression par jet d'encre
DE3104077A1 (de) "schreibkopf fuer tintenstrahldrucker"
DE69934197T2 (de) Vorrichtung zum beseitigen von flüssigkeit aus einem tintenstrahldrucker
DE3628346A1 (de) Tintendruckkopf in dickschichttechnik

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: A2

Designated state(s): DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19870129

17Q First examination report despatched

Effective date: 19880419

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL SE

REF Corresponds to:

Ref document number: 3566980

Country of ref document: DE

Date of ref document: 19890202

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

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
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: FR

Payment date: 19901022

Year of fee payment: 6

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

Ref country code: SE

Payment date: 19901024

Year of fee payment: 6

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: NL

Payment date: 19901031

Year of fee payment: 6

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

Ref country code: GB

Payment date: 19910913

Year of fee payment: 7

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

Ref country code: SE

Effective date: 19911023

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

Ref country code: NL

Effective date: 19920501

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: GB

Effective date: 19921022

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

Effective date: 19921022

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

Ref country code: DE

Payment date: 19940322

Year of fee payment: 9

EUG Se: european patent has lapsed

Ref document number: 85113417.1

Effective date: 19920510

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

Ref country code: DE

Effective date: 19950701