EP0864828B1 - Walking beam furnace - Google Patents
Walking beam furnace Download PDFInfo
- Publication number
- EP0864828B1 EP0864828B1 EP98104440A EP98104440A EP0864828B1 EP 0864828 B1 EP0864828 B1 EP 0864828B1 EP 98104440 A EP98104440 A EP 98104440A EP 98104440 A EP98104440 A EP 98104440A EP 0864828 B1 EP0864828 B1 EP 0864828B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- walking beam
- furnace according
- beam furnace
- goods
- flat
- 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 - Lifetime
Links
Images
Classifications
-
- 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
- F27B9/22—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 on rails, e.g. under the action of scrapers or pushers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
Definitions
- annealing material which can be used with both rectangular as well as round cross-section occurs are used as walking beam and pacemaker furnaces, as transporting the annealing material with less damage than ensure, for example, pusher furnaces by which Annealing material is pushed through.
- German patent application 43 43 675 describes a walking beam furnace, on the respective cooled walking beam and / or fixed beams short fasteners for Support bars running at an angle to the transport direction flat supports for the annealing material are arranged. With With the help of web bolts, these webs can be attached to their End bores or eyelets in one be fixed at the same angle to the longitudinal axis.
- a major disadvantage of the walking beam furnaces described above is that their requirements are only are designed for round or flat material.
- the invention is based on the problem a walking beam furnace for heating round and of creating flat material.
- the solution to this problem is a walking beam furnace according to claim 1, on the walking beam and fixed beam different Support bars for round or flat material are arranged.
- the flat goods supporting webs have one in the feed direction wider middle part with a flat surface and each one narrower in the feed direction and sloping slope behind the middle section.
- the round goods support webs are trough-shaped; they are preferably narrow in the middle horizontal surface and two rising to the right and left of it Slants on.
- the width of the round goods support bars in the feed direction, the width of the beveled Parts of the flat goods support webs correspond.
- the slopes the round goods and the slopes of the flat goods supporting webs are matched to each other in such a way that View of a wavy surface of the supporting webs results in the lower lying troughs with Alternate higher areas.
- the hollows serve here to the round annealing material against shifting in to secure its transport position.
- Flat annealed material, for example slabs, on the other hand can over the troughs lie on the outstanding, flat surfaces.
- the slopes of the supporting bars also point in Direction of transport seen falling to the right or left Surfaces on. Step on the round-goods supporting bars this moves on; in the case of the flat goods supporting bars, however with every slope right and left.
- the sloping surfaces reduce the build-up of scale on the supporting bars.
- the lifting and fixed beams can be on their surface have a longitudinal web. This is from the U-shaped foot of the supporting webs.
- the Flat goods supporting webs that have a hole on the side, are attached to the longitudinal web with the help of bolts.
- the Round goods support bars are placed on the longitudinal bar and by positive locking between two flat goods supporting webs fixed positively in their position and thus secured against loosening. This makes it easy Exchanging the round goods carrier bars allows.
- Walking beam and fixed beam 1 consist of a cooled Support tube 2 with flat goods support bars 3 and round goods support bars 4.
- the supporting bars 3 and 4 are in alternating Order arranged on the support tube 2.
- the flat goods supporting webs 3 have a flat contact surface 5 and one each in the feed direction in front and bevel behind it 6.
- the round goods supporting webs 4 are characterized by a - seen from the side - Narrow, horizontal surface in the middle 7 from, in front of and behind in the feed direction lying slopes 8 rise.
- the flat pads 5 serve as a support surface for flat Warm material, while from slopes 6, 8 and horizontal surface 7 existing troughs of the recording serve from round heating material.
- the flat goods supporting webs 3 there is one in the middle Hole 9 for receiving one of the attachment to the support tube 2 serving bolt 13, against by a stopper 14 Falling out of the bolt 13 is closed.
- the bolt 13 connects the flat goods support web 3 with one on one Longitudinal web 10 welded cams 15, which also has a hole in the middle.
- the round goods supporting webs 4 are only on the longitudinal web 10 of the support tube 2 attached, by positive locking held between two flat goods supporting webs 3 and secured at the same time against lifting off.
- Fig. 3 can be seen that the flat support 5 of the Flat goods support web 3 is wider in the feed direction as its bevels 6 and the round goods-supporting webs 4. The serves to ensure the necessary contact area for the flat annealing material.
- the bevels 6 are seen on the right in the feed direction and bevelled again on the left.
- the slopes 8 the round goods supporting webs 4 have such a bevel 12 only offset. This arrangement reduces scale build-up on the supporting bars. It also causes the arrangement of the cushions and the change of the side sloping slopes a constant change of Supporting the annealing material and thus its uniformity Heat.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
- Reciprocating Conveyors (AREA)
Abstract
Description
Zum gleichmäßigen Erwärmen von Glühgut, das sowohl mit rechteckigem, als auch mit rundem Querschnitt auftritt, dienen Hubbalken- und Schrittmacheröfen, da diese ein beschädigungsärmeres Transportieren des Glühgutes als beispielsweise Stoßöfen gewährleisten, durch die das Glühgut hindurchgeschoben wird.For even heating of annealing material, which can be used with both rectangular as well as round cross-section occurs are used as walking beam and pacemaker furnaces, as transporting the annealing material with less damage than ensure, for example, pusher furnaces by which Annealing material is pushed through.
Zur Gewährleistung der Form und der Tragfähigkeit der Hub- und der Festbalken auch bei hoher Ofentemperatur, bestehen diese meistens aus Kühlmittel durchströmten Rohren.To ensure the shape and load capacity of the Lifting and fixed beams even at high furnace temperatures, these mostly consist of coolant flowing through Pipes.
Aus der deutschen Offenlegungsschrift 39 39 582 ist ein Hubbalkenofen mit Tragstegen für das Glühgut auf den kühlmitteldurchströmten Hub- und Festbalken bekannt, bei denen die Tragstege mittels mit den Balken verschweißten Verriegelungselementen mit den Balken verbunden sind. Bei einigen Ausführungsformen sind ebene Tragstege für Flachgut, bei einer anderen Ausführungsform ist ein zur Mitte hin muldenförmig abgesenkter Tragsteg für rundes Glühgut vorhanden. Dadurch ergeben sich im Absenkungsbereich Haltebacken als Positionssicherung für Wärmegut mit unebenen Auflageflächen, wie Rundmaterial.From the German patent application 39 39 582 is a Walking beam furnace with supporting bars for the annealing material on the coolant-flowed walking and fixed beams known which the supporting webs by means of locking elements welded to the beams are connected to the beams. With some Embodiments are flat supporting webs for flat goods, in another Embodiment is a trough-shaped towards the center lowered support for round annealing material available. This results in the lowering area Holding jaws as position securing for heat goods with uneven contact surfaces, such as round material.
Die deutsche Offenlegungsschrift 43 43 675 beschreibt einen Hubbalkenofen, an dessen jeweils gekühlten Hubbalken und/oder Festbalken kurze Befestigungsstücke für schräg zur Transportrichtung verlaufende Tragstege mit ebenen Auflagen für das Glühgut angeordnet sind. Mit Hilfe von Stegbolzen können diese Tragstege durch an ihren Enden befindliche Bohrungen bzw. an Ösen in einem gleichen Winkel zur Längsachse fixiert werden.The German patent application 43 43 675 describes a walking beam furnace, on the respective cooled walking beam and / or fixed beams short fasteners for Support bars running at an angle to the transport direction flat supports for the annealing material are arranged. With With the help of web bolts, these webs can be attached to their End bores or eyelets in one be fixed at the same angle to the longitudinal axis.
Ein wesentlicher Nachteil der oben beschriebenen Hubbalkenöfen besteht darin, daß deren Auflagen jeweils nur für Rund- oder Flachmaterial ausgelegt sind.A major disadvantage of the walking beam furnaces described above is that their requirements are only are designed for round or flat material.
Hiervon ausgehend liegt der Erfindung das Problem zugrunde, einen Hubbalkenofen zum Erwärmen von Rund- und von Flachmaterial zu schaffen.Proceeding from this, the invention is based on the problem a walking beam furnace for heating round and of creating flat material.
Die Lösung dieses Problems besteht in einem Hubbalkenofen
gemäß Anspruch 1, auf dessen Hubbalken und Festbalken unterschiedliche
Tragstege jeweils für Rund- oder Flachmaterial
angeordnet sind.The solution to this problem is a walking beam furnace
according to
Die Flachgut-Tragstege besitzen einen in Vorschubrichtung breiteren, eine flache Oberfläche aufweisenden Mittelteil und je eine schmalere, in Vorschubrichtung vor und hinter dem Mittelteil befindliche, abfallende Schräge. Die Rundgut-Tragstege sind muldenförmig ausgebildet; sie weisen vorzugsweise in der Mitte eine schmale waagerechte Fläche und zwei rechts und links davon ansteigende Schrägen auf. Die Breite der Rundgut-Tragstege in Vorschubrichtung kann der Breite der abgeschrägten Teile der Flachgut-Tragstege entsprechen. Die Schrägen der Rundgut- und die Schrägen der Flachgut-Tragstege sind so aufeinander abgestimmt, daß sich in seitlicher Ansicht eine wellenförmige Oberfläche der Tragstege ergibt, bei der sich tieferliegende Mulden mit höherliegenden Flächen abwechseln. Dabei dienen die Mulden dazu, das runde Glühgut gegen ein Verschieben in seiner Transportposition zu sichern. Flaches Glühgut, beispielsweise Brammen, hingegen kann über die Mulden hinweg auf den herausragenden, ebenen Flächen liegen.The flat goods supporting webs have one in the feed direction wider middle part with a flat surface and each one narrower in the feed direction and sloping slope behind the middle section. The round goods support webs are trough-shaped; they are preferably narrow in the middle horizontal surface and two rising to the right and left of it Slants on. The width of the round goods support bars in the feed direction, the width of the beveled Parts of the flat goods support webs correspond. The slopes the round goods and the slopes of the flat goods supporting webs are matched to each other in such a way that View of a wavy surface of the supporting webs results in the lower lying troughs with Alternate higher areas. The hollows serve here to the round annealing material against shifting in to secure its transport position. Flat annealed material, for example slabs, on the other hand can over the troughs lie on the outstanding, flat surfaces.
Die Schrägen der Tragstege weisen darüber hinaus in Transportrichtung gesehen nach rechts bzw. links abfallende Flächen auf. Bei den Rundgut-Tragstegen treten diese versetzt auf; bei den Flachgut-Tragstegen hingegen bei jeder Schräge rechts und links. Die abfallenden Flächen vermindern das Ansammeln von Zunder auf den Tragstegen.The slopes of the supporting bars also point in Direction of transport seen falling to the right or left Surfaces on. Step on the round-goods supporting bars this moves on; in the case of the flat goods supporting bars, however with every slope right and left. The sloping surfaces reduce the build-up of scale on the supporting bars.
Die Hub- und die Festbalken können auf ihrer Oberfläche einen längs verlaufenden Steg aufweisen. Dieser wird von dem U-förmig ausgebildeten Fuß der Tragstege umfaßt. Die Flachgut-Tragstege, die seitlich eine Bohrung aufweisen, sind mit Hilfe von Bolzen am Längssteg befestigt. Die Rundgut-Tragstege werden auf den Längssteg gesteckt und durch Formschluß jeweils zwischen zwei Flachgut-Tragstegen in ihrer Position formschlüssig fixiert und somit gegen ein Lösen gesichert. Dadurch wird ein leichtes Auswechseln der Rundgut-Tragstege ermöglicht. The lifting and fixed beams can be on their surface have a longitudinal web. This is from the U-shaped foot of the supporting webs. The Flat goods supporting webs that have a hole on the side, are attached to the longitudinal web with the help of bolts. The Round goods support bars are placed on the longitudinal bar and by positive locking between two flat goods supporting webs fixed positively in their position and thus secured against loosening. This makes it easy Exchanging the round goods carrier bars allows.
Die Erfindung wird nachstehend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels des näheren erläutert. In den Zeichnungen zeigen:
- Fig. 1
- eine Draufsicht auf einen Hub- oder Festbalken eines Hubbalkenofens,
- Fig. 2
- eine Seitenansicht des Hub- oder Festbalkens der Fig. 1,
- Fig. 3
- eine Draufsicht auf mehrere Tragstege,
- Fig. 4
- einen Querschnitt entlang der Linie IV - IV gemäß Fig. 2,
- Fig. 5
- einen Querschnitt entlang der Linie V - V gemäß Fig. 2,
- Fig. 6
- einen Querschnitt entlang der Linie VI - VI gemäß Fig. 2.
- Fig. 1
- a plan view of a walking or fixed beam of a walking beam furnace,
- Fig. 2
- 2 shows a side view of the lifting or fixed beam of FIG. 1,
- Fig. 3
- a plan view of several supporting bars,
- Fig. 4
- 3 shows a cross section along the line IV-IV according to FIG. 2,
- Fig. 5
- 3 shows a cross section along the line V - V according to FIG. 2,
- Fig. 6
- 3 shows a cross section along the line VI-VI according to FIG. 2.
Hubbalken und Festbalken 1 bestehen aus einem gekühlten
Tragrohr 2 mit Flachgut-Tragstegen 3 und Rundgut-Tragstegen
4. Die Tragstege 3 und 4 sind in abwechselnder
Reihenfolge auf dem Tragrohr 2 angeordnet.Walking beam and
Die Flachgut-Tragstege 3 besitzen eine flache Auflagefläche
5 sowie je eine in Vorschubrichtung davor und
dahinter liegende Schräge 6. Die Rundgut-Tragstege 4
hingegen zeichnen sich durch eine - von der Seite gesehen
- in der Mitte liegende, schmale, waagerechte Fläche
7 aus, von der aus in Vorschubrichtung davor und dahinter
liegende Schrägen 8 ansteigen.The flat
Die flachen Auflagen 5 dienen als Auflagefläche für flaches
Wärmgut, während die aus den Schrägen 6, 8 und der
waagerechten Fläche 7 bestehenden Mulden der Aufnahme
von rundem Wärmgut dienen.The
In den Flachgut-Tragstegen 3 befindet sich mittig eine
Bohrung 9 zur Aufnahme eines der Befestigung am Tragrohr
2 dienenden Bolzens 13, die durch einen Stopfen 14 gegen
Herausfallen des Bolzens 13 verschlossen ist. Der Bolzen
13 verbindet den Flachgut-Tragsteg 3 mit einem an einem
Längssteg 10 angeschweißten Nocken 15, der ebenfalls
mittig eine Bohrung aufweist.In the flat
Die Rundgut-Tragstege 4 werden lediglich auf den Längssteg
10 des Tragrohres 2 aufgesteckt, durch Formschluß
zwischen zwei Flachgut-Tragstegen 3 gehalten und
gleichzeitig durch diese gegen Abheben gesichert.The round
Fig. 3 ist zu entnehmen, daß die flache Auflage 5 des
Flachgut-Tragsteges 3 in Vorschubrichtung breiter ist
als dessen Schrägen 6 und die Rundgut-Tragstege 4. Das
dient der Gewährleistung der notwendigen Auflagefläche
für das flache Glühgut.Fig. 3 can be seen that the
Die Schrägen 6 sind in Vorschubrichtung gesehen rechts
und links jeweils nochmals abgeschrägt. Die Schrägen 8
der Rundgut-Tragstege 4 weisen eine solche Abschrägung
12 nur versetzt auf. Diese Anordnung vermindert die Zunderansammlung
auf den Tragstegen. Darüber hinaus bewirkt
die Anordnung der Auflagen sowie der Wechsel der seitlich
abfallenden Schrägen einen ständigen Wechsel der
Auflagestellen des Glühguts und damit dessen gleichmäßiges
Erwärmen.The
Aus den Fig. 4 bis 6 ergibt sich, daß der Fuß der Tragstege
U-förmig ausgebildet ist und sich somit der Form
des Längssteges 10 des Tragrohres 2 anpaßt.4 to 6 that the foot of the supporting webs
Is U-shaped and thus the shape
of the
Claims (17)
- Walking beam furnace with fixed and walking beams (1) which have support bars (3, 4) for annealing goods to be heat treated, characterised in that a beam (1) has both support bars (3) with a planar support (5) for flat annealing goods and trough-shaped support bars (4) for round annealing goods.
- Walking beam furnace according to Claim 1, characterised in that the walking and fixed beams (1) have a longitudinal web (10) for accepting the support bars.
- Walking beam furnace according to Claim 1 or 2, characterised in that the support bars (3, 4) have a foot adapted to the longitudinal web (10) and a support (5, 6, 7, 8).
- Walking beam furnace according to one of the claims 1 to 3, characterised in that the flat goods and the round goods support bars (3, 4) are arranged offset.
- Walking beam furnace according to one of the claims 1 to 4, characterised in that the flat goods support bar (3) is detachably linked to the beam (1).
- Walking beam furnace according to one of the claims 1 to 5, characterised in that the flat goods support bars (3) have a flat support (5) and declining slopes (6) lying in front of and behind it in the advance direction.
- Walking beam furnace according to Claim 6, characterised in that the declining slopes (6) have surfaces (11) declining on both sides seen in the advance direction.
- Walking beam furnace according to one of the claims 5 to 7, characterised in that the flat support (5) is broader than the round goods support (6, 7, 8).
- Walking beam furnace according to one of the claims 1 to 8, characterised in that the flat goods support bars (3) have lateral bores (9).
- Walking beam furnace according to one of the claims 1 to 9, characterised in that the round goods support bars (4) are arranged in form-fitting manner between two flat goods support bars (3).
- Walking beam furnace according to one of the claims 1 to 10, characterised in that the support of the round goods support bar (4) comprises a narrow flat member (7) and rising slopes (8) in front of and behind it in the advance direction.
- Walking beam furnace according to Claim 10 or 11, characterised in that the rising slopes (8) have surfaces (12) declining offset, seen in the advance direction, to the left or the right, respectively.
- Walking beam furnace according to one of the claims 1 to 12, characterised in that the longitudinal web (10) has lifters (15).
- Walking beam furnace according to Claim 13, characterised in that the lifters (15) are welded onto the longitudinal web on both sides.
- Walking beam furnace according to Claim 13 or 14, characterised in that the lifters (15) have bores.
- Walking beam furnace according to one of the claims 1 to 15, characterised in that the flat goods bars (3) are linked to the lifters (15) by means of bolts (13).
- Walking beam furnace according to Claim 16, characterised in that the bolts (13) are secured by stoppers (14) against falling out.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19710870 | 1997-03-15 | ||
| DE19710870A DE19710870A1 (en) | 1997-03-15 | 1997-03-15 | Walking beam furnace |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0864828A2 EP0864828A2 (en) | 1998-09-16 |
| EP0864828A3 EP0864828A3 (en) | 1999-12-15 |
| EP0864828B1 true EP0864828B1 (en) | 2004-10-06 |
Family
ID=7823545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98104440A Expired - Lifetime EP0864828B1 (en) | 1997-03-15 | 1998-03-12 | Walking beam furnace |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6095804A (en) |
| EP (1) | EP0864828B1 (en) |
| CN (1) | CN1172154C (en) |
| AT (1) | ATE278923T1 (en) |
| CA (1) | CA2232208A1 (en) |
| DE (2) | DE19710870A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT409670B (en) * | 2001-01-15 | 2002-10-25 | Hertwich Engineering Gmbh | LIFTING BAR CONVEYOR FOR A CONTINUOUS HOLDER FOR HEATING ALUMINUM BARS |
| JP4738372B2 (en) * | 2007-04-03 | 2011-08-03 | 株式会社ノリタケカンパニーリミテド | Walking beam heat treatment equipment |
| DE102018129446B4 (en) * | 2018-11-22 | 2024-03-14 | Saint-Gobain Industriekeramik Rödental GmbH | Beam for beam conveyor furnace |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1361254A (en) * | 1919-06-19 | 1920-12-07 | Wickwire Spencer Steel Corp | Ingot-skid for ingot-heating furnaces |
| US2983498A (en) * | 1958-10-09 | 1961-05-09 | Macgregor Brothers | Conveying apparatus |
| DE2143214C2 (en) * | 1971-08-28 | 1974-01-24 | August Thyssen-Huette Ag, 4100 Duisburghamborn | Self-supporting slide rail of a pusher oven with attached riders |
| JPS5154813A (en) * | 1974-11-08 | 1976-05-14 | Chugai Ro Kogyo Kaisha Ltd | Marukohenkanetsuro |
| JPS5355876A (en) * | 1976-10-30 | 1978-05-20 | Yoshida Kogyo Kk | Intermittent feeder of portion material |
| US4391587A (en) * | 1980-03-27 | 1983-07-05 | Nippon Steel Corporation | Slab heating furnace |
| DE8901064U1 (en) * | 1989-02-01 | 1989-04-20 | Reining Heisskühlung GmbH & Co. KG, 4330 Mülheim | Attachment for coolant-flowing support tubes in heating furnaces, especially walking beam furnaces |
| DE4002870A1 (en) * | 1990-02-01 | 1991-08-08 | Loi Ind Ofenanlagen | DEVICE FOR SUPPORTING HEAT TREATMENT IN A WARMING OVEN |
| DE4203595C2 (en) * | 1992-02-10 | 2001-07-19 | Loi Thermprocess Gmbh | Device for supporting feed material in a heating furnace |
| US5405264A (en) * | 1992-04-23 | 1995-04-11 | Loi Essen Industrieofenanlagen Gmbh | Device for carrying a charge in a furnace |
| US5334014A (en) * | 1993-03-30 | 1994-08-02 | Btu International | Walking beam furnace |
| DE4343675A1 (en) * | 1993-12-21 | 1995-06-22 | Italimpianti Deutschland Gmbh | Walking beam furnace |
-
1997
- 1997-03-15 DE DE19710870A patent/DE19710870A1/en not_active Withdrawn
-
1998
- 1998-03-12 US US09/041,267 patent/US6095804A/en not_active Expired - Lifetime
- 1998-03-12 EP EP98104440A patent/EP0864828B1/en not_active Expired - Lifetime
- 1998-03-12 AT AT98104440T patent/ATE278923T1/en active
- 1998-03-12 DE DE59812054T patent/DE59812054D1/en not_active Expired - Lifetime
- 1998-03-13 CN CNB981096875A patent/CN1172154C/en not_active Expired - Fee Related
- 1998-03-16 CA CA002232208A patent/CA2232208A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US6095804A (en) | 2000-08-01 |
| DE59812054D1 (en) | 2004-11-11 |
| EP0864828A2 (en) | 1998-09-16 |
| EP0864828A3 (en) | 1999-12-15 |
| CN1202613A (en) | 1998-12-23 |
| CN1172154C (en) | 2004-10-20 |
| CA2232208A1 (en) | 1998-09-15 |
| ATE278923T1 (en) | 2004-10-15 |
| DE19710870A1 (en) | 1998-09-17 |
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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 |
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