EP0492300A2 - Procédé pour adapter les dispositifs de mesure de déplacement de presses hydrauliques pour composites, à utiliser de différentes hauteurs, et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé pour adapter les dispositifs de mesure de déplacement de presses hydrauliques pour composites, à utiliser de différentes hauteurs, et dispositif pour la mise en oeuvre du procédé Download PDF

Info

Publication number
EP0492300A2
EP0492300A2 EP91121313A EP91121313A EP0492300A2 EP 0492300 A2 EP0492300 A2 EP 0492300A2 EP 91121313 A EP91121313 A EP 91121313A EP 91121313 A EP91121313 A EP 91121313A EP 0492300 A2 EP0492300 A2 EP 0492300A2
Authority
EP
European Patent Office
Prior art keywords
press ram
measuring
press
held
units
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.)
Granted
Application number
EP91121313A
Other languages
German (de)
English (en)
Other versions
EP0492300B1 (fr
EP0492300A3 (en
Inventor
Heinz Hoffmann
Ulrich Dr.-Ing. Weber
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.)
Umformtechnik Erfurt GmbH
Original Assignee
Krupp Maschinentechnik GmbH
Umformtechnik Erfurt GmbH
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 Krupp Maschinentechnik GmbH, Umformtechnik Erfurt GmbH filed Critical Krupp Maschinentechnik GmbH
Publication of EP0492300A2 publication Critical patent/EP0492300A2/fr
Publication of EP0492300A3 publication Critical patent/EP0492300A3/de
Application granted granted Critical
Publication of EP0492300B1 publication Critical patent/EP0492300B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
    • B30B15/245—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam using auxiliary cylinder and piston means as actuating members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/26—Programme control arrangements

Definitions

  • the invention relates to a method for adapting the displacement measuring units to press tools of hydraulic plastic presses of different heights, the press rams of which are aligned parallel to a reference plane by support on counter-cylinder units, the displacement transducers of the displacement measuring units being held in contact with a projection which can be held in different positions with respect to the press ram. be moved with the press ram at least for a period of time that begins shortly before the pressing tool closes and ends shortly after its opening; the invention further relates to a device suitable for carrying out the method.
  • a stroke of the press ram in the order of magnitude of at most 100 mm is generally assigned to this time span; the closing movement of the press ram comes to a standstill at the latest when the mold halves of the press tool are supported directly against one another (for example over so-called distances) in the direction of the press ram stroke. Since the corresponding displacement measuring units are accordingly only designed for a stroke of up to approximately 150 mm, care must be taken to ensure that the displacement measurement can be carried out over the required period of time even when pressing tools with different height dimensions are used.
  • the displacement measuring units With regard to the operational safety and measuring accuracy of the displacement measuring units, it must also be taken into account that under certain circumstances the position of the measuring plane - for example due to an unexpectedly high pressing force - can deviate from that of an assumed reference plane;
  • the displacement measuring units must therefore be designed with the best possible use of the available measuring range in such a way that this is not exceeded even in exceptional cases.
  • the invention is based on the object of specifying a method for adapting the displacement measuring units to pressing tools of different heights and a device suitable for carrying out the method, which allow at least one remote control with reasonable effort.
  • the required components should be of simple construction, less prone to failure and, if possible, also commercially available.
  • the object is achieved by a method which has the features of claim 1.
  • the adaptation to the height dimension of a new pressing tool is then initiated in that it is completely closed - for the purpose of defining a reference plane; the mold halves come into direct contact with one another in the direction of the press ram stroke - in the usual way over distances attached to them.
  • the projections are released before the closing process is initiated by releasing their locking element in such a way that (in the simplest case under the influence of their own weight, but possibly also under the action of a reset, for example in the form of a spring element) within a predetermined path section relative to Press ram can move in the direction of the displacement sensor.
  • the adaptation of the displacement measuring units can be automated by using suitable control elements (valves, limit switches, time switches) will.
  • suitable control elements valves, limit switches, time switches
  • the above-mentioned object is further achieved by a device with the features of claim 2.
  • the projections designed as actuating rods can be held in place with respect to the press ram by means of clamping cylinder units.
  • the displacement transducers consist of measuring rods aligned with the actuating rods, the movement of which in the direction of the press ram stroke is converted into a measuring signal via a measuring head and which can be acted upon alternately in both directions with drive energy by means of a double-acting drive cylinder unit.
  • Another essential feature of the invention is that the lower target end position of the measuring rods is determined by a resilient stop.
  • At least one of the two cylinder units namely the drive cylinder unit, is preferably designed as a compressed air unit (claim 3); this makes it possible, if necessary, to support the measuring rods resiliently on the counter surface that is possibly in question, namely on the associated actuating rod or on the associated stop. This should be such that its restoring force is greater than the force acting in the direction of it from the measuring rod (claim 4), which is composed essentially of the pressure force generated by the drive cylinder unit and the dead weight acting on the measuring rod.
  • the drive cylinder unit is expediently designed in such a way that its larger piston surface is pressurized in the stroke state (claim 5). In this way, each measuring rod is held with sufficient security on the associated actuating rod of the press ram during the period of parallel control.
  • the device can be further configured in that the measuring rod is part of an adjustment frame which is movably guided with respect to the press frame via ball bearings and on which the piston rod of the drive cylinder unit acts (claim 6).
  • the clamping points of the actuating rods are preferably designed as slide bearings, on which the clamping cylinder unit acts at least indirectly in the clamped state (claim 7).
  • the clamp connection should be designed in such a way that the entrainment force that it generates in the event of a fault is less than the force that would destroy the displacement measuring unit or cause the actuating rod to buckle.
  • the slide bearing can in particular be formed by a DU bushing, which at the same time ensures that slipping of the actuating rod in the event of a fault does not damage its surface.
  • the hydraulic plastic press shown in Fig. 1 - for example for production of pressed parts made of fiber composite materials - in addition to four counter cylinder units 1 (two of which are perpendicular to the drawing plane next to each other), a press frame 2 with a press table 3 and a press ram 4, which can be moved in the vertical direction via a hydraulic press drive 5 (double arrow 6) at the top Crosshead 2a of the press frame is held.
  • the press table 3 is attached to the side parts 2b.
  • Parts 4 and 3 each carry a mold half of the pressing tool, namely the upper mold half 7 and the lower mold half 8 resting on a heating plate 9; these limit one another during the pressing and curing process a mold cavity producing the pressed part.
  • the parallel operation of the press ram 4 with respect to the press table 3 is brought about in that the former is supported on the counter-holding surfaces 1a of the counter-holding cylinder units facing it, which are equipped with a control system, not shown.
  • the distance between the press table 3 and the press ram 4 - and thus the orientation of the part 4 with respect to a reference plane (for example the reference plane 8a on the lower mold half) - can be determined at least temporarily by means of four displacement measuring units 10 which are outside the region of the mold halves 7 and 8 are each arranged in the vicinity of a counter cylinder unit 1.
  • Each displacement measuring unit 10 basically consists of a movable displacement sensor in the form of a measuring rod 11, which is held in a housing 12; this in turn is attached to the press table 3.
  • the measuring rods 11 are held in contact with projections of the press ram 4 over a predetermined path section, which act as actuating rods 13 are trained. As soon as the mold halves 7 and 8 have approached each other sufficiently during the closing movement of the press ram 4, the actuating rods 13 come into contact with the measuring rods 11 and in extreme cases carry them along until the mold halves 7 and 8 move in the direction of the press ram stroke ( see arrow 6), for example, support each other directly at reference plane 8a. The movement of the pressing rods 11 with respect to their housing 12 triggers the generation of measurement signals which are used in a manner known per se for aligning the press ram 4 via the counter-cylinder units 1.
  • Each actuating rod 13 is supported by a slide bearing in the form of a DU bush 14 in an extension 4a, which is part of the press ram 4 and to which a clamping cylinder unit 16 is fastened via webs 15 (FIG. 2). Due to the biasing force of a return spring 17 which acts on the piston 16a on the side facing away from the press ram 4, the extension 4a is deformed under the action of the piston rod 16b in such a way that a clamping point holding the actuating rod 13 forms.
  • the side of the piston 16a facing the press ram 4 can be alternately connected to a compressed air source 20 via a pressure line 19 or can be depressurized via a return line 21; the pressurization via the pressure line 19 has the consequence that the parts 16a, 16b move to the left, as a result of which the actuating rod 13 is released; their freedom of movement with respect to the press ram 4 in the direction of the associated measuring rod 11 is limited by a paragraph 13a.
  • Each measuring rod 11 is part of an adjusting frame 22 which is held movably with respect to the press frame (for example the press table 3) via ball bearing guides 23 and on which the piston rod 24b of a double-acting drive cylinder unit 24 acts; this is - like the ball bearing guides 23 - fixed within the housing 12 via partitions 25.
  • the adjustment frame 22 has, on the side facing away from the measuring rod 11, a glass scale 26 which is scanned by a measuring head 27 which is stationary with respect to the housing 12 and whose displacement corresponding to the movement of the measuring rod 11 triggers the generation of measuring signals; these can be fed via a signal line 28 along with connection 28a for further evaluation.
  • a resilient stop 29 is arranged inside the housing 12, by means of which the lower desired end position of the part 11 is determined.
  • the drive cylinder unit 24 is connected via two lines 30, 31 to a changeover valve 32 which is preceded by a pressure line 33 together with a compressed air source 34 and from which a return line 35 which is kept unpressurized originates.
  • a changeover valve 32 By actuating the changeover valve 32, one of the two lines 30, 31 can alternately be pressurized with compressed energy via the compressed air source 34, while at the same time the other line via the return line 35 is relieved of pressure.
  • the line 31 is pressurized so that the measuring rod 11 - after sufficient lowering of the press ram 4 in the direction of the press table 3 comes into contact with the actuating rod 13 - by the latter when the closing movement continues, counter to the restoring force emanating from the drive cylinder unit 24, is carried along and thereby triggers corresponding measurement signals via the glass scale 26 and the measuring head 27.
  • the adjusting frame 22 together with the measuring rod 11 can be lowered until it rests on the resilient stop 29.
  • the subject matter of the invention is handled as follows: Starting from the open position (cf. Fig. 1), the actuating rods 13 are released by pressurizing their clamping cylinder unit 16 via the pressure line 19, so that they act under their own weight relative to the press ram 4 (or to the extension 4a) within one given path section in Can move towards the associated measuring rod 11; the end of the path section is determined by the paragraph 13a located above the extension 4a.
  • the pressing tool is now closed in the empty state to such an extent that its mold halves 7, 8 are supported against one another in the direction of the press ram stroke, for example at the reference plane 8a.
  • the measuring rods 11 serving as displacement transducers are lowered by pressurizing the line 30 by means of the drive cylinder unit 24 into a lower desired end position, which is predetermined by the resilient stop 29; due to the configuration of this stop, the target end position approximately corresponds to the position of the end face 29a facing the measuring rod 11.
  • the actuating rods 13, which are supported on the respectively associated measuring rod 11 are immovably held in the thereby predetermined support position by closing their clamping cylinder unit 16 with respect to the press ram 4. This is done in that the supply of compressed air via the pressure line 19 is interrupted by actuating the changeover valve 18 and the clamping cylinder unit 16 is connected to the return line 21.
  • the measuring rods 11 are affected by the lifting force then acting on them (interaction of the parts 24a, 24b and 22 ) resiliently held in the sense of a tracking on the actuating rods 13, the tracking path - ie the freedom of movement with respect to the housing 12 - through the upper End position of the drive cylinder unit (in the exemplary embodiment predetermined by the stop surface 22a) is limited.
  • the advantage achieved by the invention is that the measuring rods 11 can be brought into a lower desired end position with simple means when the pressing tool is closed and the position of the actuating rods 13 with respect to the press ram 4 can be adapted to the height dimension of the pressing tool in question.
  • the necessary displacement and / or locking of the interacting actuating rods and measuring rods can be brought about by means of remote-controlled components, so that the adaptation to differently designed pressing tools is readily suitable for automation.
  • the invention can also be designed in such a way that the clamping cylinder units 16 are released in the empty state only after the closing movement of the press tool has been initiated, ie the actuating rods 13 are released during the closing movement with respect to the press ram 4.
  • the actuating rods 13 may also be provided with a reset within the scope of the invention. This can consist in particular of spring elements which generate a restoring force which acts on the actuating rods 13 and acts in the direction of the measuring rods 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
EP91121313A 1990-12-22 1991-12-12 Procédé pour adapter les dispositifs de mesure de déplacement de presses hydrauliques pour composites, à utiliser de différentes hauteurs, et dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0492300B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4041654 1990-12-22
DE4041654A DE4041654A1 (de) 1990-12-22 1990-12-22 Verfahren zur anpassung der wegmesseinheiten hydraulischer kunststoffpressen an unterschiedlich hoch ausgebildete presswerkzeuge und zur durchfuehrung des verfahrens geeignete vorrichtung

Publications (3)

Publication Number Publication Date
EP0492300A2 true EP0492300A2 (fr) 1992-07-01
EP0492300A3 EP0492300A3 (en) 1992-12-23
EP0492300B1 EP0492300B1 (fr) 1996-04-24

Family

ID=6421350

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91121313A Expired - Lifetime EP0492300B1 (fr) 1990-12-22 1991-12-12 Procédé pour adapter les dispositifs de mesure de déplacement de presses hydrauliques pour composites, à utiliser de différentes hauteurs, et dispositif pour la mise en oeuvre du procédé

Country Status (3)

Country Link
EP (1) EP0492300B1 (fr)
DE (2) DE4041654A1 (fr)
ES (1) ES2086467T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016110877A1 (fr) 2015-01-08 2016-07-14 Persico S.P.A. Presse et procédé de moulage d'un lingot composé d'un matériau thermoplastique ou thermodurcissable
CN107671164A (zh) * 2017-10-30 2018-02-09 天津普越金属制品有限公司 冲压机反冲底座及其制造工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110653911A (zh) * 2019-11-04 2020-01-07 苏州琦少工程科技有限公司 一种木门生产用冷压机导向装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635074A (en) * 1969-10-20 1972-01-18 Barogenics Inc Compensating system for presses
US3640660A (en) * 1967-10-10 1972-02-08 Albert De Mets Press, particularly for forming fiber plates
US4076780A (en) * 1977-01-27 1978-02-28 General Motors Corporation Programmable velocity and force control method for compression molding
DE3843593A1 (de) * 1987-12-26 1989-07-27 Kobe Steel Ltd Werkzeugausrichtverfahren und -vorrichtung fuer eine formteilpresse

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799720A (en) * 1972-09-19 1974-03-26 R Fjellman Compression moulding press

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640660A (en) * 1967-10-10 1972-02-08 Albert De Mets Press, particularly for forming fiber plates
US3635074A (en) * 1969-10-20 1972-01-18 Barogenics Inc Compensating system for presses
US4076780A (en) * 1977-01-27 1978-02-28 General Motors Corporation Programmable velocity and force control method for compression molding
DE3843593A1 (de) * 1987-12-26 1989-07-27 Kobe Steel Ltd Werkzeugausrichtverfahren und -vorrichtung fuer eine formteilpresse

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016110877A1 (fr) 2015-01-08 2016-07-14 Persico S.P.A. Presse et procédé de moulage d'un lingot composé d'un matériau thermoplastique ou thermodurcissable
EP3242793A1 (fr) * 2015-01-08 2017-11-15 Persico S.p.A. Presse et procédé de moulage d'un lingot composé d'un matériau thermoplastique ou thermodurcissable
CN107671164A (zh) * 2017-10-30 2018-02-09 天津普越金属制品有限公司 冲压机反冲底座及其制造工艺

Also Published As

Publication number Publication date
EP0492300B1 (fr) 1996-04-24
DE4041654A1 (de) 1992-06-25
ES2086467T3 (es) 1996-07-01
EP0492300A3 (en) 1992-12-23
DE59107725D1 (de) 1996-05-30

Similar Documents

Publication Publication Date Title
DE4313473C2 (de) Schließeinheit für eine Spritzgießmaschine
DE3842660C2 (de) Einrichtung an Preßwerkzeugen für die Lagesicherung faserverstärkter Kunststoffmassen
EP3470355A1 (fr) Dispositif tampon pour une cabine d'ascenseur ainsi qu'agencement du dispositif tampon et ascenseur
DE1906223A1 (de) Presse
DE3029629C2 (de) Sicherheitsabdeckung für den Gießformbereich einer Kunststoff-Spritzgießmaschine
DE19743111C2 (de) Vorrichtung und Verfahren zum Verschieben von zwei Türen einer Seitenwand eines Druckwerkes
EP0915008A1 (fr) Dispositif de support
DE112021004993T5 (de) Synergistischer und stabiler Stickstoffdünger und Herstellungsverfahren dafür
EP0492300B1 (fr) Procédé pour adapter les dispositifs de mesure de déplacement de presses hydrauliques pour composites, à utiliser de différentes hauteurs, et dispositif pour la mise en oeuvre du procédé
EP3370890B1 (fr) Dispositif de réglage d'un cylindre de refoulement d'une cage refouleuse
EP2030772A2 (fr) Dispositif de sécurité sur des machines de formage
DE4426521C1 (de) Vorrichtung zum Schließen von Formen für die Herstellung von Gegenständen aus Kunststoff
DE3916014A1 (de) Werkzeug zum durchsetzfuegen, nieten oder einpressen
EP3468908B1 (fr) Dispositif de levage avec dispositif d'arrêt
DE19510488C1 (de) Vorrichtung zum Schließen von Formen für die Herstellung von Gegenständen aus Kunststoff
DE4438754A1 (de) Aufhängung für ein an einem Zylinder einer Druckmaschine an- und abstellbares Andrückelement
DE8525550U1 (de) Vorrichtung zum Glätten von Oberbekleidungsstücken wie Sakkos, Mäntel u.dgl.
DE4227645A1 (de) Sicherheitsvorrichtung für einen Rohrelevator
EP0560781B1 (fr) Procede et dispositif de soudage a l'arc avec percussion
DE1958227A1 (de) Pneumatische Presse
EP1265722A1 (fr) Procede et dispositif pour diviser par rupture une piece de machine comportant un orifice de logement pour palier
DE3211795C2 (de) Sicherheitseinrichtung an einer druckmittelbetätigbaren Werkstück-Spannvorrichtung
DE4035954C1 (en) Manipulator for nuclear reactor vessel - includes carriage which can be driven along vertically arranged guide rail
DE1136467B (de) Aufzug mit einer unter dem Kabinenboden auf Lastaenderungen ansprechenden Schaltvorrichtung
DE2357316A1 (de) Mechanische spannvorrichtung fuer werkzeuge an pressen, vorzugsweise an kurbel- und tiefziehpressen

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 ES FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: UMFORMTECHNIK ERFURT GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19930611

17Q First examination report despatched

Effective date: 19940630

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59107725

Country of ref document: DE

Date of ref document: 19960530

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

Effective date: 19960514

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2086467

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961127

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: 19961205

Year of fee payment: 6

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

Ref country code: ES

Payment date: 19961209

Year of fee payment: 6

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

Ref country code: DE

Payment date: 19970228

Year of fee payment: 6

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
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: 19971212

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19971213

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

Ref country code: FR

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

Effective date: 19971231

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

Effective date: 19971212

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

Ref country code: DE

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

Effective date: 19980901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010402

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

Ref country code: IT

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

Effective date: 20051212