EP0499850A1 - Procédé et four continu pour le traitement thermique d'articles - Google Patents

Procédé et four continu pour le traitement thermique d'articles Download PDF

Info

Publication number
EP0499850A1
EP0499850A1 EP92101498A EP92101498A EP0499850A1 EP 0499850 A1 EP0499850 A1 EP 0499850A1 EP 92101498 A EP92101498 A EP 92101498A EP 92101498 A EP92101498 A EP 92101498A EP 0499850 A1 EP0499850 A1 EP 0499850A1
Authority
EP
European Patent Office
Prior art keywords
continuous furnace
furnace
workpiece
batches
floor
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
EP92101498A
Other languages
German (de)
English (en)
Other versions
EP0499850B1 (fr
Inventor
Richard Cochius
Hans Helmut Dr.-Ing. Borggrefe
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.)
LOI Thermprocess GmbH
Original Assignee
NASSHEUER LOI INDUSTRIEOFENANLAGEN GmbH
NASSHEUER LOI INDUSTRIEOFENANL
LOI Thermprocess 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 NASSHEUER LOI INDUSTRIEOFENANLAGEN GmbH, NASSHEUER LOI INDUSTRIEOFENANL, LOI Thermprocess GmbH filed Critical NASSHEUER LOI INDUSTRIEOFENANLAGEN GmbH
Publication of EP0499850A1 publication Critical patent/EP0499850A1/fr
Application granted granted Critical
Publication of EP0499850B1 publication Critical patent/EP0499850B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/028—Multi-chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace walking beam furnace
    • F27B9/202—Conveyor mechanisms therefor

Definitions

  • the invention relates to a method and a continuous furnace for the heat treatment of workpiece batches, which are introduced at the inlet end of the continuous furnace, moved in succession through the continuous furnace and removed from the continuous furnace at the outlet end.
  • the invention has for its object to improve the continuous annealing of workpiece batches and in particular to make them applicable to workpiece batches of great weight.
  • the method according to the invention is used to achieve this object characterized in that the workpiece batches are moved one step at a time, starting at the outlet end of the continuous furnace.
  • the invention thus improves continuous furnace operation and, in particular, enables its use on extremely heavy batches of workpieces, such as are present, for example, when annealing coils.
  • Adjustable circulation fans are preferably used which have a spiral with two outlets.
  • the protective gas is conducted in countercurrent, which results in optimal surface qualities. It should also be emphasized that the method according to the invention is particularly suitable for high-convection operation, but that high-temperature operation is equally possible.
  • the batches of workpieces are individually lifted and transported in the direction of passage, preferably being lifted from below through at least one recess in the bottom of the continuous furnace.
  • the invention uses the movement sequence of walking beam furnaces, but with the proviso that only one batch of workpieces is moved at a time.
  • the invention proposes that the workpiece batches be carried by mobile floor elements, which together in the lowered position close the recess in the floor of the continuous furnace.
  • the lifting mechanism located underneath the furnace floor is thus optimally shielded, namely during the stationary state by a double floor, which only partially and briefly releases the underbody and its recess during the relocation.
  • the mobile floor elements are designed so that they connect to each other in the direction of passage and can thereby form a closed floor surface.
  • the batches of workpieces can then be arranged on the mobile floor elements in such a way that doors or separating slides can be retracted to form chambers, i.e. from different heating, cooling, mass transfer or flushing zones and brought to bear on the mobile floor elements.
  • the steps by which the workpiece batches are displaced individually are of different lengths. This creates gaps for retracting the gate valve regardless of the mutual spatial assignment of the workpiece batches.
  • the invention further relates to a continuous furnace for the heat treatment of workpiece batches with an input conveyor, an inlet chamber, at least one treatment chamber, an outlet chamber and an output conveyor and with a transport device for the cyclical transport of the workpiece batches through the continuous furnace, the latter being characterized according to the invention in that it is provided in its base with at least one recess running in the longitudinal direction of the furnace and that the transport device below the base has a converter which can be moved in the longitudinal direction of the furnace and has at least one converter which can be raised through the recess in the base Has lifting device. With each cycle, the converter begins at the outlet end of the continuous furnace and shifts the workpiece batch located there by one step in the direction of passage.
  • the continuous furnace according to the invention enables those advantages to be achieved which have already been explained in connection with the method according to the invention.
  • a construction is particularly suitable in which the bottom of the continuous furnace is provided with two parallel recesses which divide it into two edge strips and a central strip, and in which the converter has two lifting devices located next to one another.
  • the material to be treated is not only supported and carried centrally, but in two spaced-apart areas.
  • the input conveyor and preferably also the output conveyor is designed as a roller conveyor extending at least into the inlet chamber, the rollers located at the inner end of which are each divided into at least two spaced sections.
  • the invention therefore makes use of features of conventional roller hearth furnaces, but with two special features.
  • the rollers are only used in areas with low temperatures, which on the one hand means their load capacity and their security against emergency situations and on the other hand allows high treatment temperatures in the middle part of the continuous furnace. For the rest, this results in price advantages and options for implementing defined fall programs.
  • the roller conveyors are provided with transfer areas in which the rollers each form roller sections with spaces for the passage of the lifting device acting from below. This allows a favorable transition from role promotion to the individual implementation according to the invention.
  • rollers divided into sections preferably each form three sections, of which the two lateral ones can be driven. This already prevents the workpiece batches from tilting due to the type of funding.
  • the input conveyor can easily have corresponding tilting and coil turning devices.
  • the inlet and outlet chambers will usually be designed as locks, whether as vacuum or flushing locks.
  • the inlet conveyor will usually only extend into the inlet chamber, since this is followed by the heating zones. Different in the outlet area. There, cooling zones, for example rapid cooling devices for residual cooling in high-temperature operation, can be connected upstream of the outlet chamber. Accordingly, it is possible to have the exit conveyor reach these zones in the continuous furnace. For cost reasons, the internal transition areas with the roles divided into sections will only be selected as long as is necessary for the storage space of a batch.
  • the workpiece batches can be arranged on any supports or in any containers. This is how conventional grates, baskets and the like come. in question.
  • a particularly advantageous and, accordingly, essential further development of the invention is that a mobile floor element is assigned to each workpiece batch, the mobile floor elements when resting on the floor of the continuous furnace, cover the recess in that floor. This also applies to those areas of the roller conveyor in which the rollers are each divided into sections. The entire area or "sub-furnace" located below the floor and integrated into the furnace atmosphere is thus optimally thermally shielded.
  • the mobile floor elements form a closed top floor. During the transfer, its stroke is approx. 50 mm, the transfer process taking about one minute.
  • the heating can be switched off during the entire conversion cycle. Even at treatment temperatures of over 1000 ° C, the lower furnace only takes on a temperature slightly above the ambient temperature.
  • the mobile floor elements are reusable and are circulated between the outlet and the inlet of the continuous furnace.
  • each floor element has a base plate, supports for the workpiece batches arranged on the base plate and thermal insulation inserted between the supports.
  • the thermal insulation increases the thermal shielding of the sub-oven, whereby the base plate in conjunction with the supports provides the required strength and resilience.
  • a support and guidance system for the workpiece batch is preferably arranged on the support elements.
  • This support and control system ensures optimal adaptation to the respective workpiece batch, both with regard to the mechanical properties and the desired convection conditions. In this way, optimal heat treatment under the most gentle operations, for example for the belt edges, is ensured.
  • the support and control system can be designed, for example, to accommodate individual coils with a large diameter or a plurality of coils with a smaller diameter. It is preferably detachably connected to the supports and can be made of ceramic if high temperature conditions are required.
  • the invention is directed to a mobile base element for carrying a batch of workpieces during the cyclical transport through a continuous furnace, this base element being characterized in that it has a base plate, supports for the workpiece batch arranged on the base plate and thermal insulation inserted between the supports.
  • the floor element optimally combines mechanical strength with a high thermal insulation effect and is suitable for forming a closed top floor in the continuous furnace in conjunction with neighboring floor elements of the same type.
  • a support and guidance system for the workpiece batch is preferably arranged on the support elements, advantageously detachably connected to the supports.
  • the support and control system is made of ceramic.
  • the floor element is sandwiched.
  • the continuous furnace comprises an inlet conveyor 1 in the form of a roller conveyor which extends into an inlet chamber 2 which is designed as a lock chamber.
  • a plurality of treatment chambers adjoins the inlet chamber 2, of which the treatment chambers 3 and 4 are shown in FIG. 1A and the treatment chambers 5, 6 and 7 are shown in FIG. 1B.
  • the treatment chambers can merge.
  • separating slides 8 can also be provided in order to optionally seal the treatment chambers from one another.
  • the decisive factor is the respective heating, mass transfer and cooling program.
  • the doors of the lock chamber are to be equated to the separating slide 8.
  • FIG. 1B the treatment chamber 7 is followed by an outlet chamber 9, which is also designed as a lock.
  • FIG. 1B also shows an exit conveyor 10, also in the form of a roller conveyor, which extends into the treatment chambers. Since the treatment chambers 6 and 7 are cooling chambers, the output conveyor 10 is subjected to thermal loads just as little as the input conveyor 1.
  • All treatment chambers and also the inlet and outlet chambers are equipped with workpiece batches 11 indicated by dash-dotted lines.
  • the batch of workpieces in the outlet chamber 9 is ready for removal.
  • Each workpiece batch 11 rests on a mobile floor element 12, as will be explained in more detail in connection with FIG. 4.
  • a converter 13 according to FIGS. 1A and 3, which is also shown in FIG. 1B, takes care of the transport of the mobile floor elements 12, in dash-dotted lines at the end its moving motion.
  • the converter 13 is arranged below the furnace floor 14 in a lower furnace 15 and has two mountings 16 which can be moved alongside one another in the longitudinal direction.
  • Each carriage 16 carries a lifting device 18 with an upper flat iron 19 (shown in the lowered position in FIG. 1A).
  • the bottom 14 of the continuous furnace is provided with two recesses 20 and 21 which are provided in the direction of the passage and which divide the bottom into two edge strips 22 and a central strip 23 (FIG. 3). The latter is supported separately, while the edge strips 22 are connected in one piece to the associated furnace side walls.
  • rollers of the roller conveyors 1 and 10 in the inlet chamber 2 and in the treatment chamber 6 are each divided into three sections, namely into the lateral sections 24 and the central sections 25.
  • the spaces between the individual sections, of which only the outer sections 24 are driven, form continuations of the recesses 20 and 21 of the base 14.
  • the flat iron 19 of the converter 13 can reach through when the lifting devices 18 are raised and each have a mobile base element Lift 12 with the workpiece batch 11 on it and move it in the longitudinal direction of the furnace.
  • the outlet chamber 9 is emptied, whereupon the cooled batch is transported from the treatment chamber 7 into the outlet chamber 9 by actuating the output conveyor 10. At the same time or thereafter, the batch moves from the treatment chamber 6 into the treatment chamber 7. This takes place in each case with the mobile floor elements 12.
  • the converter 13 is located below the treatment chamber 5.
  • the lifting devices 17 are actuated so that the flat iron 19 lifts the mobile base element 12 with the workpiece batch 11 located thereon.
  • An actuation of the chain drive 17 allows the converter 13 to move under the treatment chamber 6, the flat irons moving between the roller sections. The load can then be lowered and lowered (position of the converter 13 according to FIG. 1B).
  • the invention is particularly applicable to heat treatment of particularly difficult workpiece batches, for example coil annealing.
  • heating, cooling and circulation of the atmosphere are concerned, the entire range of variations available can be used.
  • Indications of heating or cooling devices can be found in the treatment chambers 4, 5 and 6.
  • the treatment chambers 4 to 7 show schematic indications of circulating devices arranged in the upper area.
  • the mobile floor elements 12 are offset by the same stride lengths. In the idle state, they therefore form a closed upper floor which securely closes the recesses 20 and 21 and thereby thermally shields the lower furnace 15. In the inlet and outlet area, the stride length can be adapted to the space available.
  • the base element has a steel base plate 26 which supports 27. Between the supports thermal insulation 28 is inserted.
  • the supports 27 carry a support and guidance system 29, which is detachably attached and in the present case consists of ceramic.
  • the mobile floor element combines great load-bearing capacity with good thermal insulation.
  • the bottom of the continuous furnace can be provided with a single recess running in the direction of the throughflow.
  • the division of the roles is then adapted to this design.
  • the converter can also work with a single central carriage.
  • the input and output conveyors can be of any design as long as they allow the converter to reach through in the transfer area. However, this can be ensured particularly easily in the case of roller conveyors. Mention should also be made of the possibility of supporting the load in more than two areas transversely to the direction of travel.
  • the support and guidance system can be omitted for the mobile floor elements, provided that the convection control below the workpiece batch is not important.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
EP92101498A 1991-02-06 1992-01-30 Procédé et four continu pour le traitement thermique d'articles Expired - Lifetime EP0499850B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4103454A DE4103454C2 (de) 1991-02-06 1991-02-06 Verfahren und Durchlaufofen zum Wärmebehandeln von Werkstückchargen
DE4103454 1991-02-06

Publications (2)

Publication Number Publication Date
EP0499850A1 true EP0499850A1 (fr) 1992-08-26
EP0499850B1 EP0499850B1 (fr) 1996-06-12

Family

ID=6424422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92101498A Expired - Lifetime EP0499850B1 (fr) 1991-02-06 1992-01-30 Procédé et four continu pour le traitement thermique d'articles

Country Status (4)

Country Link
EP (1) EP0499850B1 (fr)
AT (1) ATE139330T1 (fr)
DE (2) DE4103454C2 (fr)
ES (1) ES2089254T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823294A1 (fr) * 1996-08-05 1998-02-11 MANNESMANN Aktiengesellschaft Procédé de fabrication d'une bande en acier basse et ultra basse de teneur en carbon

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005056599B3 (de) * 2005-11-25 2007-05-24 Otto Junker Gmbh Ofenanlage zur thermischen Behandlung von metallischem Gut

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996293A (en) * 1958-08-27 1961-08-15 Fallon John Furnaces for annealing and heat treatment of metals and other materials
FR2048101A5 (en) * 1969-06-05 1971-03-19 Issard Pierre Periodically advancing workpieces in pro- - gressive heating furnaces
DE3105064A1 (de) * 1981-02-12 1982-09-02 Thyssen Grillo Funke GmbH, 4650 Gelsenkirchen Verfahren zur waermebehandlung von zu bunden (coils) aufgehaspeltem metallband
US4586898A (en) * 1984-12-14 1986-05-06 Btu Engineering Corporation Multi-zone furnace system
US4966547A (en) * 1988-03-31 1990-10-30 Central Glass Company, Limited Heat treatment method using a zoned tunnel furnace

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1200851B (de) * 1961-07-21 1965-09-16 Brockmann & Bundt Ind Ofenbau Foerdersystem fuer Schrittmacheroefen
DE1221260B (de) * 1965-04-23 1966-07-21 Universale Ind Ofenbau Gmbh Hubtransportofen mit Unterbeheizung
DE2831251C2 (de) * 1978-07-15 1986-10-16 Smit Ovens Nijmegen B.V., Nijmegen Hubplattenofen
DE3021275A1 (de) * 1980-06-06 1982-04-22 Wistra GmbH Thermoprozesstechnik, 4000 Düsseldorf Hubbalkenofen mit aufsatzstuecken
DE3030944C2 (de) * 1980-08-16 1985-09-19 Linco Gmbh, 5205 St Augustin Feuerfeste Wärmeisolierplatte
DE3208132C2 (de) * 1982-03-06 1985-02-14 Didier Engineering Gmbh, 4300 Essen Durchschubofen
JPS61285381A (ja) * 1985-06-12 1986-12-16 大同特殊鋼株式会社 局部加熱室を有する真空炉

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996293A (en) * 1958-08-27 1961-08-15 Fallon John Furnaces for annealing and heat treatment of metals and other materials
FR2048101A5 (en) * 1969-06-05 1971-03-19 Issard Pierre Periodically advancing workpieces in pro- - gressive heating furnaces
DE3105064A1 (de) * 1981-02-12 1982-09-02 Thyssen Grillo Funke GmbH, 4650 Gelsenkirchen Verfahren zur waermebehandlung von zu bunden (coils) aufgehaspeltem metallband
US4586898A (en) * 1984-12-14 1986-05-06 Btu Engineering Corporation Multi-zone furnace system
US4966547A (en) * 1988-03-31 1990-10-30 Central Glass Company, Limited Heat treatment method using a zoned tunnel furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823294A1 (fr) * 1996-08-05 1998-02-11 MANNESMANN Aktiengesellschaft Procédé de fabrication d'une bande en acier basse et ultra basse de teneur en carbon

Also Published As

Publication number Publication date
EP0499850B1 (fr) 1996-06-12
ATE139330T1 (de) 1996-06-15
ES2089254T3 (es) 1996-10-01
DE4103454C2 (de) 1993-10-21
DE59206515D1 (de) 1996-07-18
DE4103454A1 (de) 1992-08-13

Similar Documents

Publication Publication Date Title
DE3132373C2 (fr)
DE3307071A1 (de) Verfahren zur waermerueckgewinnung bei der waermebehandlung von metallischem nutzgut und durchlaufofen dazu
DE2051743A1 (de) Einsatzhartungsanlage
DE2804338C2 (de) Durchlauf-Ofen zur Wärmebehandlung von Kleinteilen
DE19651408A1 (de) Werkstückträger zum Wärmebehandeln von Werkstücken
EP0499850B1 (fr) Procédé et four continu pour le traitement thermique d'articles
EP0361147B1 (fr) Four continu pour le traitement thermique d'articles, en particulier de tubes céramiques
DE3301815A1 (de) Stossofen mit hubeinrichtung im heisstemperaturbereich
EP0654644B1 (fr) Dispositif pour la cuisson de produits céramiques ou analogue
DE3726802A1 (de) Verfahren zum waermebehandeln von metallischen werkstuecken sowie vorrichtung zur durchfuehrung des verfahrens
DE1758011B1 (de) Durchlaufofen zum Aufkohlen oder Karbonitrieren
DE102009019573A1 (de) Ofen und Verfahren zum Erwärmen wenigstens eines Werkstückes
AT524961B1 (de) Anordnung mit mehreren Temperierstationen zur Wärmebehandlung von Bauteilen und deren Handhabung
DE19858582C2 (de) Anlage zum thermischen Behandeln von metallischen Werkstücken
EP1621840B1 (fr) Four de traitement thermique à défilement
EP3757496A1 (fr) Installation de four tunnel à rouleaux et procédé de chauffage des blancs en acier revêtus d'aluminium, de silicium et/ou de zinc à la température de durcissement et de pression
DE102015010401A1 (de) Schubofen
DE102010027439B3 (de) Turmofen zum Erhitzen von härtbaren Blechplatinen
DE19726628C1 (de) Parkeinrichtung für Kraftfahrzeuge und Verfahren zu deren Betrieb
DE2512485A1 (de) Verfahren zum brennen von keramischen produkten in einem diskontinuierlichen ofen, sowie brennofen zur durchfuehrung des verfahrens
WO2015090590A1 (fr) Procédé, four et installation permettant le formage à chaud de pièces
AT388441B (de) Drehherdofen in ringbauart zur waermebehandlung von werkstuecken
EP0522512B1 (fr) Procédé et dispositif pour le traitement thermique de pièces
DE19741552C2 (de) Be- und Entladevorrichtung für Brenntischaufbauten eines Ofenwagens
EP0357898B1 (fr) Four industriel, en particulier four à chambre, pour le traitement thermique de pièces métalliques

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 BE CH DE ES FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19930215

17Q First examination report despatched

Effective date: 19941010

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

Owner name: LOI THERMOPROCESS GMBH

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

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

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

Ref country code: NL

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

Effective date: 19960612

Ref country code: GB

Effective date: 19960612

REF Corresponds to:

Ref document number: 139330

Country of ref document: AT

Date of ref document: 19960615

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59206515

Country of ref document: DE

Date of ref document: 19960718

ITF It: translation for a ep patent filed

Owner name: STUDIO TORTA SOCIETA' SEMPLICE

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2089254

Country of ref document: ES

Kind code of ref document: T3

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2089254

Country of ref document: ES

Kind code of ref document: T3

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19960612

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

Ref country code: AT

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

Effective date: 19970130

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

Ref country code: SE

Effective date: 19970131

Ref country code: LI

Effective date: 19970131

Ref country code: ES

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

Effective date: 19970131

Ref country code: CH

Effective date: 19970131

Ref country code: BE

Effective date: 19970131

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
BERE Be: lapsed

Owner name: LOI THERMPROCESS G.M.B.H.

Effective date: 19970131

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: 19970930

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

Ref country code: DE

Effective date: 19971001

EUG Se: european patent has lapsed

Ref document number: 92101498.1

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: 20000503

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: 20050130