EP0200658A1 - Heizzylinder für Produkte wie Filme, Folien, Platten oder dergleichen - Google Patents

Heizzylinder für Produkte wie Filme, Folien, Platten oder dergleichen Download PDF

Info

Publication number
EP0200658A1
EP0200658A1 EP86420098A EP86420098A EP0200658A1 EP 0200658 A1 EP0200658 A1 EP 0200658A1 EP 86420098 A EP86420098 A EP 86420098A EP 86420098 A EP86420098 A EP 86420098A EP 0200658 A1 EP0200658 A1 EP 0200658A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
wall
fixed body
temperature
liquid
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
EP86420098A
Other languages
English (en)
French (fr)
Other versions
EP0200658B1 (de
Inventor
Jacques Cellier
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.)
Cellier Sa (societe Anonyme De Droit Francais)
CELLIER SA
Original Assignee
Cellier Sa (societe Anonyme De Droit Francais)
CELLIER SA
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 Cellier Sa (societe Anonyme De Droit Francais), CELLIER SA filed Critical Cellier Sa (societe Anonyme De Droit Francais)
Priority to AT86420098T priority Critical patent/ATE39569T1/de
Publication of EP0200658A1 publication Critical patent/EP0200658A1/de
Application granted granted Critical
Publication of EP0200658B1 publication Critical patent/EP0200658B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D11/00Heat-exchange apparatus employing moving conduits
    • F28D11/02Heat-exchange apparatus employing moving conduits the movement being rotary, e.g. performed by a drum or roller
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F5/00Elements specially adapted for movement
    • F28F5/02Rotary drums or rollers

Definitions

  • Heating rollers are used in a very large number of branches of industry whenever it is a question of bringing to a given temperature or drying a product in the form of a film, a sheet or a 'a plate. This is particularly the case in the leather, stationery, plastics, rubber, etc. industries.
  • the simplest heating method consists, as shown in FIG. 1, of placing inside a cylinder (2) a certain number of electrical resistors (3) rotating with the cylinder and supplied by the rotor (4). .
  • This type of cylinder has significant drawbacks, however, since the impossibility of performing a very fine distribution of the electrical resistances results in significant temperature differences along a generator and along a circumference.
  • the fluids used are, depending on the applications and the temperature ranges, water, heat pipe oils, steam or specialized fluids.
  • the calorie production system (5) is external to the consumer cylinder (6), whether it is a centralized system (for a cylinder bank) or an individual system for each cylinder. Calories are supplied by electrical resistors (7), oil, gas and coal burners - (steam) in the generator outside the cylinder. A temperature sensor (8) measures the temperature of the fluid and regulates it.
  • the heat transfer fluid After the heat transfer fluid has been brought to the desired temperature of the receiver, either directly or indirectly by mixing, it is conveyed by a system of pumps (9) and is introduced into the cylinder by a rotary joint (10) ensuring the sealing.
  • the fluid circulates either inside the cylinder (technique known as the hollow body), or in an annular space created at the periphery of the cylinder between the outer ferrule and a second inner ferrule, or in even more efficient systems inside spirals or rectilinear channels (12) judiciously distributed and crossed.
  • the objective is to ensure a circulation at high speed of the heat transfer fluid, so that the calories consumed by the treated product are replaced as quickly as possible without preferential heating on one side or another.
  • a fluid accelerator element In the case of fluids, the existence of a fluid accelerator element (pump) is essential. In the case of steam, the pressure difference is sufficient to ensure the circulation of the fluid at high speed, the supply of calories taking place by conduction and partially by condensation.
  • the so-called rotating heat pipe technique in which, as shown in FIG. 3, the cylinder (13) comprises, in the immediate vicinity of the product to be treated, an annular space (14) placed under a high vacuum and partially filled with a heat transfer liquid (15) located, due to the high depression of the chamber (14) in which it remains, in a state of constant vaporization over the entire temperature range of use of the cylinder.
  • this heat transfer fluid is to ensure, in the same way as the fluid in the cylinders described above, a circulation of steam at very high speed (immediate compensation for temperature differences) and supply of calories by condensation.
  • the supply of calories is generally made from inside the cylinder by the heating mode of the "short-circuit transformer" (16) consisting of creating, from a fixed winding at the Inside the cylinder, a magnetic field which by short-circuit looping in the metallic mass of the cylinder (in rotation) releases by Joule effect the calories necessary for the system.
  • This type of cylinder is extremely efficient on the. in terms of temperature regulation, thanks to the heat transfer fluid and in terms of calorie creation by transformer effect.
  • it has the drawback of being relatively expensive in terms of implementation, due to the high cost of the electrical windings required, which generally limits its application to cylinders of very small dimensions.
  • thermocouple This is an important difference compared to the previous type of cylinder where the fluid is warmed up outside the rotating cylinder, it is simple to measure the temperature of the fluid before it enters the system, the thermocouple then being static and the regulation system therefore having an acceptable cost.
  • the present invention aims to remedy these drawbacks.
  • the fixed body is regulated to a temperature close to the temperature of use of the cylinder by various devices, which can be either a circulation of hot fluid, or electrical resistances, or other means capable of bringing or removing from the body the calories necessary to allow it to reach the desired thermal balance.
  • the supply of calories is done in an extremely simple way, since the hot body is fixed inside the cylinder, avoiding components, such as rotary joints for a fluid system, or rotary contacts for an electrical supply, which would be necessary if the body was mobile.
  • the annular volume delimited between the two walls of the shell, is permanently depressed. and is partially filled with a fluid, which is, due to its thermodynamic characteristics and the degree of vacuum, in permanent equilibrium between a vapor phase and a liquid phase, over the entire range of temperatures of use of the cylinder .
  • This highly efficient heat transfer system located in the rotating part of the cylinder ensures temperature balance over the entire surface of the cylinder due to the very high speed circulation of steam in the closed and vacuum enclosure. constituted by the annular volume delimited by the two walls of the shell.
  • the fixed body has, in cross section, a shape of a circular sector, of axis corresponding to the axis of the cylinder, and of radius slightly less than the radius of the inner wall of the ferrule.
  • the heat transmission system between the fixed body and the shell can be done by radiation or convection.
  • the means for transmitting calories between the fixed body and the inner wall of the shell consist of a blade of liquid, chosen for its stability at the temperature of use.
  • the rotary part of the cylinder constitutes a closed volume inside which the heating fixed body is located.
  • the fixed body extends over a sector, for example a quarter of a circle situated below the axis of the cylinder, and the level of the contact liquid is also situated below the axis of the cylinder.
  • the seal provided by the rotating part of the cylinder may be sketchy, since the level of liquid does not exceed the level of the axis. It is therefore a type of sealing that has no common measure with that required by rotary seals which are required to be absolutely sealed, even under relatively high operating pressures.
  • the contact liquid having only a simple function of transmission of calories by thermal conductivity between the fixed body and the rotating shell, it is not necessary, contrary to the conditions required in conventional cylinders, ensure a speed of movement im carrying the liquid to carry out the transfer of calories, and simultaneously the balancing of the temperatures, this being ensured by the heat transfer fluid inside the shell.
  • This cylinder is also equipped with a temperature regulation device comprising a measurement probe, located in the fixed body near the connection liquid between the fixed heating body and the inner wall of the shell.
  • FIG. 4 represents a perspective view of this heating cylinder, one end of which is partially cut away.
  • This cylinder comprises a cylindrical shell comprising two concentric walls, respectively, exterior (20) and interior (22), delimiting an annular volume (23), this shell being integral in rotation with the shaft (24) of the cylinder.
  • the annular volume (23) is permanently depressed, and is partially filled with a fluid (25) which, due to its thermodynamic characteristics and the degree of vacuum, is in permanent equilibrium between a vapor phase and a liquid phase, over the entire operating temperature range of the cylinder.
  • a fixed body Inside the ferrule, is disposed a fixed body (26) having, in cross section, a shape of a circular sector, corresponding to a quarter of a circle, of axis corresponding to the axis of the cylinder and of slightly smaller radius. to the radius of the inner wall of the ferrule.
  • This fixed body (26) is equipped with heating means constituted by resistors (27) in the embodiment shown in the drawing. Between the fixed body (26) and the rotating part, and more precisely the inner wall (22) thereof, the heat transfer is ensured by a blade of a liquid (28) the level of which is located below the axis of the cylinder, and which is chosen to have good stability at the operating temperature of the cylinder.
  • This cylinder finally has a temperature regulation device, the probe (29) of which is disposed in the fixed body (26) near the liquid ensuring thermal contact between the fixed body (26) and the inner wall (22) of the shell. .
  • the invention brings a great improvement to the existing technique by providing a heating cylinder of simple design, because the hot body is fixed and requires only simple means of implementation both on the plan of the creation of the calories that of the regulation of the temperature, that the heat transfer fluid, located in the rotating part of the cylinder, ensures an excellent temperature balance on all the surface of the cylinder, and finally that the transfer of calories between the body fixed and the rotating part, is obtained by a liquid which does not require strict sealing conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Paper (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
EP86420098A 1985-04-12 1986-04-10 Heizzylinder für Produkte wie Filme, Folien, Platten oder dergleichen Expired EP0200658B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86420098T ATE39569T1 (de) 1985-04-12 1986-04-10 Heizzylinder fuer produkte wie filme, folien, platten oder dergleichen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8506078A FR2580386B1 (fr) 1985-04-12 1985-04-12 Cylindre chauffant pour produits se presentant sous forme de films, feuilles, plaques ou similaires
FR8506078 1985-04-12

Publications (2)

Publication Number Publication Date
EP0200658A1 true EP0200658A1 (de) 1986-11-05
EP0200658B1 EP0200658B1 (de) 1988-12-28

Family

ID=9318510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86420098A Expired EP0200658B1 (de) 1985-04-12 1986-04-10 Heizzylinder für Produkte wie Filme, Folien, Platten oder dergleichen

Country Status (6)

Country Link
US (1) US4717338A (de)
EP (1) EP0200658B1 (de)
JP (1) JPS61245485A (de)
AT (1) ATE39569T1 (de)
DE (2) DE3661575D1 (de)
FR (1) FR2580386B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035839A1 (de) * 1995-05-09 1996-11-14 Eduard Küsters Maschinenfabrik GmbH & Co. KG Beheizbare walze
CN112286244A (zh) * 2020-11-04 2021-01-29 四川大学 一种温度、ph值实时监控智能转鼓及其使用方法

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4033986A1 (de) * 1990-08-09 1992-02-13 Schwaebische Huettenwerke Gmbh Walze mit heizeinrichtung
FI960702A0 (fi) * 1996-02-16 1996-02-16 Ppr Consulting Ltd Oy Torkanordning foer fiberbanor
US5760375A (en) * 1996-10-08 1998-06-02 Hall; Timothy G. Heated rollers
JP2002530722A (ja) 1998-11-25 2002-09-17 インデイゴ ナムローゼ フェンノートシャップ 溶融装置および中間転写ドラム
EP1325389B1 (de) * 2000-10-13 2008-12-17 Hewlett-Packard Indigo B.V. Fixier- und/oder Zwischenübertragungstrommel
KR100400003B1 (ko) * 2000-12-22 2003-09-29 삼성전자주식회사 전자사진 화상형성 장치의 정착 롤러 장치
US6683284B2 (en) 2002-03-22 2004-01-27 Metso Paper Karlstad Ab Thermal roll for papermaking with a fluid circulation system and method therefor
ES2211364A1 (es) * 2004-02-27 2004-07-01 Girbau, S.A. Rodillo calentable para maquina planchadora-secadora de articulos de ropa.
US7462318B2 (en) * 2004-10-07 2008-12-09 Biomet Manufacturing Corp. Crosslinked polymeric material with enhanced strength and process for manufacturing
DE102005000795A1 (de) * 2005-01-05 2006-07-13 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn
DE102005000794A1 (de) * 2005-01-05 2006-07-13 Voith Paper Patent Gmbh Vorrichtung und Verfahren zur Herstellung und/oder Veredelung einer Faserstoffbahn
KR20070014430A (ko) * 2005-07-28 2007-02-01 삼성전자주식회사 이미지드럼 및 그것을 구비하는 솔리드 잉크젯화상형성장치의 이미지시스템
CN102353147A (zh) * 2011-09-09 2012-02-15 罗晴海 一种电热水器热交换装置
ITVI20130295A1 (it) * 2013-12-12 2015-06-13 Sintec Textile Srl Sistema di riscaldamento di cilindri ad uso industriale
US10086674B2 (en) * 2015-09-11 2018-10-02 Denso International America, Inc. Air conditioning system having cylindrical heat exchangers
WO2021104917A1 (en) * 2019-11-25 2021-06-03 Basf Se Process for removing water from a wet particulate material
CN111270546B (zh) * 2020-03-18 2021-09-14 泰兴市中亚烘干设备制造有限公司 一种立式浸胶烘干设备用烘干机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1517981A (fr) * 1967-01-30 1968-03-22 Cylindre tournant pour le traitement thermique de tissus ou autres éléments continus
FR2095892A5 (en) * 1970-06-04 1972-02-11 Monforts Fabric treatment roller - with double walls and internal burner - to give steam heating of outer shell
FR2185046A1 (de) * 1972-05-16 1973-12-28 Hunt & Moscrop
FR2321103A2 (fr) * 1972-05-16 1977-03-11 Hunt Moscrop Ltd Perfectionnements aux appareils chauffants
DE2543806A1 (de) * 1975-10-01 1977-04-14 Kannegiesser H Kg Rotationskoerper zur herstellung und/oder behandlung von bahnen, stuecken, folien und verbundmaterialien
GB2130341A (en) * 1982-11-05 1984-05-31 Mario Monti Rotary cylinder assembly including a heated oil-bath

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2739218A (en) * 1953-05-20 1956-03-20 Ohio Brass Co Heating rolls
US2909849A (en) * 1955-11-25 1959-10-27 Beloit Iron Works Drum drier mechanism
US2844887A (en) * 1957-02-08 1958-07-29 Beloit Iron Works Dryer
USRE25927E (en) * 1957-04-10 1965-12-07 Drying drum amd method
US3343587A (en) * 1966-04-01 1967-09-26 William C Triplett Drum drying of liqueform substances
DE2454742A1 (de) * 1974-11-19 1976-05-26 Feldmuehle Anlagen Prod Kondensatschoepfer
JPS6012086B2 (ja) * 1976-01-20 1985-03-29 大日本インキ化学工業株式会社 湿潤剤
GB1588926A (en) * 1976-09-27 1981-04-29 Ricoh Kk Heat fixing apparatus
US4229644A (en) * 1976-10-20 1980-10-21 Ricoh Company, Ltd. Heat pipe roller
US4252184A (en) * 1980-03-10 1981-02-24 Kimberly-Clark Corporation Control of oil distribution in heated embossing rolls

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1517981A (fr) * 1967-01-30 1968-03-22 Cylindre tournant pour le traitement thermique de tissus ou autres éléments continus
FR2095892A5 (en) * 1970-06-04 1972-02-11 Monforts Fabric treatment roller - with double walls and internal burner - to give steam heating of outer shell
FR2185046A1 (de) * 1972-05-16 1973-12-28 Hunt & Moscrop
FR2321103A2 (fr) * 1972-05-16 1977-03-11 Hunt Moscrop Ltd Perfectionnements aux appareils chauffants
DE2543806A1 (de) * 1975-10-01 1977-04-14 Kannegiesser H Kg Rotationskoerper zur herstellung und/oder behandlung von bahnen, stuecken, folien und verbundmaterialien
GB2130341A (en) * 1982-11-05 1984-05-31 Mario Monti Rotary cylinder assembly including a heated oil-bath

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035839A1 (de) * 1995-05-09 1996-11-14 Eduard Küsters Maschinenfabrik GmbH & Co. KG Beheizbare walze
CN112286244A (zh) * 2020-11-04 2021-01-29 四川大学 一种温度、ph值实时监控智能转鼓及其使用方法

Also Published As

Publication number Publication date
EP0200658B1 (de) 1988-12-28
FR2580386A1 (fr) 1986-10-17
US4717338A (en) 1988-01-05
FR2580386B1 (fr) 1987-06-26
ATE39569T1 (de) 1989-01-15
JPS61245485A (ja) 1986-10-31
DE200658T1 (de) 1987-04-30
DE3661575D1 (en) 1989-02-02

Similar Documents

Publication Publication Date Title
EP0200658B1 (de) Heizzylinder für Produkte wie Filme, Folien, Platten oder dergleichen
EP1943447B1 (de) Verbessertes abgedichtetes steuerventil für einen fluidstromkreis
EP0379437B1 (de) Verfahren und Vorrichtung zur Schnellregulierung einer Wandtemperatur
CA1306598C (fr) Procede de conduite d'une reaction thermochimique et installation permettant la mise en oeuvre de ce procede
FR2682253A1 (fr) Sole chauffante destinee a assurer le chauffage d'un objet dispose a sa surface et reacteur de traitement chimique muni de ladite sole.
FR2527302A1 (fr) Tuyaux de transport de fluides isoles au vide
WO2004061342A1 (fr) Vanne de commande a etancheite amelioree pour circuit de circulation de fluide
EP2023055B1 (de) Heizkörper für Haushalte mit Zweiphasen-Wärmeübertragungsmittel
FR2581442A2 (fr) Generateur de vapeur a evaporation directe
EP1393904B1 (de) Rotationspresse zum Anbringen von Bildern auf einem Substrat
US4229644A (en) Heat pipe roller
FR2602035A1 (fr) Procede et installation de transfert de chaleur entre un fluide et un organe a refroidir ou rechauffer, par mise en depression du fluide par rapport a la pression atmospherique
EP0065428A1 (de) Walze mit einstellbarer Durchbiegung, insbesondere für die Papierindustrie
FR2593750A1 (fr) Generateur de chaleur a friction, notamment pour vehicule automobile
WO2010081957A1 (fr) Radiateur pour chauffage domestique a fluide caloporteur diphasique
CH640618A5 (fr) Joint d'etancheite interfacial radial a jeu positif.
EP0086730A1 (de) Mikrowellenkessel zur Erzeugung einer warmen Flüssigkeit zum privaten oder industriellen Gebrauch oder zum Raumheizen und Verfahren welches durch diesen Kessel zum Einsatz gebracht wird
FR2956412A1 (fr) Vanne d'obturation a volume constant d'une source de depot en phase vapeur
FR2767189A1 (fr) Generateur de chaleur de type a fluide visqueux
FR2818488A3 (fr) Element a temperature constante pour appareils chauffants, tels que grille-pain, fours et chauffe-eau
EP0076759A1 (de) Vorrichtung zur kontinuierlichen Bestimmung des Heizwertes von Gasen
EP0154878B1 (de) Wärmetauscher
FR2805286A1 (fr) Secheuse-repasseuse a cuvette de repassage chauffante et fluide caloporteur
EP3610942B1 (de) Antikontaminationsflansch für parylen-maschine
FR3026165A1 (fr) Dispositif de traitement thermique d'un fluide a consommation energetique reduite

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): AT CH DE GB IT LI

PUAB Information related to the publication of an a document modified or deleted

Free format text: ORIGINAL CODE: 0009199EPPU

PUAF Information related to the publication of a search report (a3 document) modified or deleted

Free format text: ORIGINAL CODE: 0009199SEPU

R17D Deferred search report published (corrected)

Effective date: 19861210

RA1 Application published (corrected)

Date of ref document: 19861210

Kind code of ref document: A1

ITCL It: translation for ep claims filed

Representative=s name: JACOBACCI CASETTA & PERANI S.P.A.

17P Request for examination filed

Effective date: 19861224

TCAT At: translation of patent claims filed
DET De: translation of patent claims
17Q First examination report despatched

Effective date: 19870409

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE GB IT LI

REF Corresponds to:

Ref document number: 39569

Country of ref document: AT

Date of ref document: 19890115

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

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

Ref document number: 3661575

Country of ref document: DE

Date of ref document: 19890202

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: GB

Payment date: 19910408

Year of fee payment: 6

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

Ref country code: CH

Payment date: 19910419

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: 19910422

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: AT

Payment date: 19910430

Year of fee payment: 6

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

Ref country code: GB

Effective date: 19920410

Ref country code: AT

Effective date: 19920410

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

Ref country code: LI

Effective date: 19920430

Ref country code: CH

Effective date: 19920430

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

Effective date: 19930101

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;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050410