EP0444312B1 - Diskroller for a roller hearth furnace - Google Patents
Diskroller for a roller hearth furnace Download PDFInfo
- Publication number
- EP0444312B1 EP0444312B1 EP90125531A EP90125531A EP0444312B1 EP 0444312 B1 EP0444312 B1 EP 0444312B1 EP 90125531 A EP90125531 A EP 90125531A EP 90125531 A EP90125531 A EP 90125531A EP 0444312 B1 EP0444312 B1 EP 0444312B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disk
- support
- tubular support
- support tube
- disks
- 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
- 239000011810 insulating material Substances 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010000496 acne Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
Definitions
- the invention relates to a disc roller for roller hearth furnaces, with a rotatable, internally coolable support tube, a plurality of axially spaced apart on the support tube, fixedly connected to this and an insulation surrounding the support tube next to the discs.
- Such disc rollers have proven themselves in practice. They represent inexpensive roller constructions and are suitable for high-temperature operation, and thanks to the insulation they work with low heat losses.
- disc rollers of this type (DE-C-37 40 620)
- the discs are supported directly on the support tube, and they are usually welded to it. This leads to an abrupt jump in temperature at the transitions between the discs and the support tube. Welding cracks can occur. There is also a risk that the disc rollers will warp when removed from the hot oven.
- the invention has for its object to provide a disc roller of the type mentioned, which has improved thermal properties.
- the disc roller according to the invention is characterized in that each disc is seated on two lateral support devices which are supported on the support tube and are connected to the associated disks by axial bolts, at least one of the two support devices being firmly connected to the support tube is.
- Another significant advantage is that the temperature gradient between the material to be treated and the panes is reduced. This largely reduces the formation of heat shadows in the material to be treated.
- a cavity is created between each disc and the support tube, which reduces the direct heat transfer.
- This advantageous effect can also be extended to the heat transfer between the disks and the bolts, in accordance with the invention in that the disks each have at least two circumferential webs penetrated by the bolts on their inner circumference.
- the outflow of heat can be controlled.
- Another possibility in this regard according to the invention is that the space between the support devices, the associated disk and the support tube is filled with insulating material.
- the surface temperature of the disc roll can be controlled according to the invention so that it assumes a desired value which is below the furnace temperature and which takes into account the aspects of pimple formation and the temperature uniformity of the material to be heated.
- the disks each consist of at least two segments adjoining one another in the circumferential direction. This simplifies the manufacture of the high-temperature-resistant panes and works has a positive impact on the maintenance and repair of the roller hearth furnace. Such a division of the panes is indispensable if the two respective associated support devices are inseparably connected to the support tube and a subsequent assembly or replacement of the associated pane is nevertheless to take place.
- the invention also offers the structurally advantageous possibility that the support devices each consist of flange segments.
- the disc roller according to the invention is characterized in that the support devices which are firmly connected to the support tube are each welded to a holder which is screwed to the support tube. This not only simplifies all assembly and disassembly work, but also eliminates any direct welded connections to the support tube.
- the disc roller according to the invention comprises a support tube 1, which is penetrated by an axial inner tube 2 for its internal cooling.
- a plurality of disks 3 are arranged on the support tube 1, only one of which is shown in each case.
- the longitudinal sections between the disks and also at the end of the support tube are surrounded by insulation 4.
- Each disc 3 is seated on two lateral support devices 5 and 6 and is connected to the latter by bolts 7.
- the support devices consist of flange segments and are welded to the support tube 1.
- the disk 3 also consists of segments, specifically two segments that connect directly to one another in the circumferential direction.
- the discs 3 are not in direct heat-transfer contact with the support tube 1. This results in a thermally favorable construction.
- the cavity which is formed between the two guide devices 5 and 6, the disk 3 and the support tube 1 is filled with insulating material 8.
- the embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 in that the disk 3 carries a circumferential, narrow web 9 on its inner circumference.
- the formed between the disc 3 and the support tube 1, laterally cavity delimited by the guide devices 5 and 6 is thereby extended laterally outwards, which has a positive influence on the heat transfer conditions.
- Parts of the bolts 7 are covered with the insulating material 8.
- two webs 9 are provided, namely that they connect laterally to the supporting devices 5 and 6.
- the two webs 9 are not only at a distance from one another, but also from the lateral support devices 5 and 6.
- FIG. 5 differs from that according to FIGS. 1 to 4 in that the support device 6 is welded to a holder 10, which in turn is screwed to the support tube 1, as indicated in the lower half of FIG. 5 .
- the support device 5 is only loosely supported on the support tube 1.
- the bolts 7 are designed as head bolts and, in contrast to FIGS. 1, 3 and 4, are welded to the support device 6 only on one side.
- the support of the disks on the support devices can be designed differently, for example in such a way that the support devices form shoulders into which the disks engage.
- the bolts can also be screwed in, secured with split pins or held by nuts.
- the disks can consist of a large number of segments. The same applies to the supporting devices. There is no restriction on the number of ridges that are provided on the inner circumference of the disks.
- insulation material for the cavity Any suitable material can be used within the panes. The cavity can also produce a sufficient effect alone without being filled with insulating material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
Description
Die Erfindung betrifft eine Scheibenrolle für Rollenherdöfen, mit einem drehbaren, intern kühlbaren Tragrohr, einer Mehrzahl von in axialem Abstand zueinander auf dem Tragrohr angeordneten, fest mit diesem verbundenen Scheiben und einer das Tragrohr neben den Scheiben umgebenden Isolierung. Derartige Scheibenrollen haben sich in der Praxis bewährt. Sie stellen preiswerte Rollenkonstruktionen dar und eignen sich für den Hochtemperaturbetrieb, wobei sie dank der Isolierung mit geringen Wärmeverlusten arbeiten.The invention relates to a disc roller for roller hearth furnaces, with a rotatable, internally coolable support tube, a plurality of axially spaced apart on the support tube, fixedly connected to this and an insulation surrounding the support tube next to the discs. Such disc rollers have proven themselves in practice. They represent inexpensive roller constructions and are suitable for high-temperature operation, and thanks to the insulation they work with low heat losses.
Bei bekannten Scheibenrollen dieser Art (DE-C-37 40 620) stützen sich die Scheiben direkt auf dem Tragrohr ab, wobei sie in der Regel mit diesem verschweißt sind. Dies führt zu einem abrupten Temperatursprung an den Übergängen zwischen den Scheiben und dem Tragrohr. Es kann zu Schweißnahtrissen kommen. Auch besteht die Gefahr, daß sich die Scheibenrollen beim Ausbau aus dem heißen Ofen verziehen.In known disc rollers of this type (DE-C-37 40 620), the discs are supported directly on the support tube, and they are usually welded to it. This leads to an abrupt jump in temperature at the transitions between the discs and the support tube. Welding cracks can occur. There is also a risk that the disc rollers will warp when removed from the hot oven.
Dementsprechend liegt der Erfindung die Aufgabe zugrunde, eine Scheibenrolle der eingangs genannten Art zu schaffen, die verbesserte thermische Eigenschaften aufweist.Accordingly, the invention has for its object to provide a disc roller of the type mentioned, which has improved thermal properties.
Zur Lösung dieser Aufgabe ist die Scheibenrolle nach der Erfindung dadurch gekennzeichnet, daß jede Scheibe auf zwei seitlichen Trageinrichtungen aufsitzt, die sich auf dem Tragrohr abstützen und durch axiale Bolzen mit der zugehörigen Scheiben verbunden sind, wobei mindestens eine der beiden Trageinrichtungen fest mit dem Tragrohr verbunden ist.To achieve this object, the disc roller according to the invention is characterized in that each disc is seated on two lateral support devices which are supported on the support tube and are connected to the associated disks by axial bolts, at least one of the two support devices being firmly connected to the support tube is.
Es tritt also kein direkter Wärmefluß zwischen den Scheiben und dem Tragrohr auf. Vielmehr wird die Wärme gezwungen, die Trageinrichtungen zu passieren. Letztere sind durch Bolzen mit den zugehörigen Scheiben verbunden. Es entfällt also die Gefahr von Schweißnahtrissen an den Scheiben, was insbesondere dann von Bedeutung ist, wenn die Scheiben aus einem Spezialwerkstoff bestehen. Insgesamt erweisen sich die erfindungsgemäßen Scheibenrollen als besonders hochtemperaturfest, und zwar auch bei abrupten Temperaturänderungen, etwa beim Ausbau aus dem heißen Ofen oder bei Schaltvorgängen im Kühlsystem.So there is no direct heat flow between the discs and the support tube. Rather, the heat is forced to pass through the support structures. The latter are connected to the associated washers by bolts. There is therefore no risk of weld seam cracks on the panes, which is particularly important if the panes are made of a special material. Overall, those according to the invention prove to be Disc rollers are particularly resistant to high temperatures, even when there are abrupt changes in temperature, for example when removing them from the hot oven or when switching in the cooling system.
Als weiterer wesentlicher Vorteil ergibt sich, daß das Temperaturgefälle zwischen dem zu behandelnden Gut und den Scheiben vermindert wird. Dadurch läßt sich die Bildung von Wärmeschatten in dem zu behandelnden Gut weitgehend reduzieren.Another significant advantage is that the temperature gradient between the material to be treated and the panes is reduced. This largely reduces the formation of heat shadows in the material to be treated.
Zwischen jeder Scheibe und dem Tragrohr entsteht erfindungsgemäß ein Hohlraum, der den direkten Wärmeübergang vermindert. Dieser vorteilhafte Effekt kann auch auf den Wärmeübergang zwischen den Scheiben und den Bolzen erstreckt werden, und zwar erfindungsgemäß dadurch, daß die Scheiben auf ihrem Innenumfang jeweils mindestens zwei umlaufende, von den Bolzen durchsetzte Stege aufweisen.According to the invention, a cavity is created between each disc and the support tube, which reduces the direct heat transfer. This advantageous effect can also be extended to the heat transfer between the disks and the bolts, in accordance with the invention in that the disks each have at least two circumferential webs penetrated by the bolts on their inner circumference.
Mit der Größe und Gestalt des Hohlraums zwischen dem Tragrohr und der jeweiligen Scheibe läßt sich der Abfluß der Wärme steuern. Eine weitere diesbezügliche Möglichkeit besteht erfindungsgemäß darin, daß der Raum zwischen den Trageinrichtungen, der zugehörigen Scheibe und dem Tragrohr durch Isoliermaterial gefüllt ist.With the size and shape of the cavity between the support tube and the respective disc, the outflow of heat can be controlled. Another possibility in this regard according to the invention is that the space between the support devices, the associated disk and the support tube is filled with insulating material.
In jedem Fall läßt sich erfindungsgemäß die Oberflächentemperatur der Scheibenrolle steuern, so daß sie einen gewünschten, unter der Ofentemperatur liegenden Wert annimmt, der die Gesichtspunkte der Pickelbildung und der Temperaturgleichmäßigkeit am zu wärmenden Material berücksichtigt.In any case, the surface temperature of the disc roll can be controlled according to the invention so that it assumes a desired value which is below the furnace temperature and which takes into account the aspects of pimple formation and the temperature uniformity of the material to be heated.
Nach einem besonders vorteilhaften Merkmal der Erfindung bestehen die Scheiben jeweils aus mindestens zwei in Umfangsrichtung aneinander anschließenden Segmenten. Dies vereinfacht die Herstellung der hochtemperaturfesten Scheiben und wirkt sich positiv auf die Wartung und Instandhaltung des Rollenherdofens aus. Unerläßlich ist eine derartige Teilung der Scheiben, wenn beide jeweils zugehörigen Trageinrichtungen unlösbar mit dem Tragrohr verbunden sind und dennoch eine nachträgliche Montage oder Auswechselung der zugehörigen Scheibe erfolgen soll.According to a particularly advantageous feature of the invention, the disks each consist of at least two segments adjoining one another in the circumferential direction. This simplifies the manufacture of the high-temperature-resistant panes and works has a positive impact on the maintenance and repair of the roller hearth furnace. Such a division of the panes is indispensable if the two respective associated support devices are inseparably connected to the support tube and a subsequent assembly or replacement of the associated pane is nevertheless to take place.
Die Erfindung bietet ferner die konstruktiv vorteilhafte Möglichkeit, daß die Trageinrichtungen jeweils aus Flanschsegmenten bestehen.The invention also offers the structurally advantageous possibility that the support devices each consist of flange segments.
Nach einem weiteren bevorzugten Merkmal ist die erfindungsgemäße Scheibenrolle dadurch gekennzeichnet, daß die fest mit dem Tragrohr verbundenen Trageinrichtungen jeweils mit einer Halterung verschweißt sind, die mit dem Tragrohr verschraubt ist. Dadurch vereinfachen sich nicht nur sämtliche Montage- und Demontagearbeiten, sondern es entfallen auch jegliche direkten Schweißverbindungen mit dem Tragrohr.According to a further preferred feature, the disc roller according to the invention is characterized in that the support devices which are firmly connected to the support tube are each welded to a holder which is screwed to the support tube. This not only simplifies all assembly and disassembly work, but also eliminates any direct welded connections to the support tube.
Die Erfindung wird im folgenden anhand bevorzugter Ausführungsbeispiele im Zusammenhang mit der beiliegenden Zeichnung näher erläutert. Die Zeichnung zeigt in:
- Fig. 1
- einen axialen Teilschnitt durch eine erste Ausführungsform einer erfindungsgemäßen Scheibenrolle;
- Fig. 2
- einen Schnitt entlang der Linie II-II in Fig. 1;
- Fig. 3
- einen Schnitt entsprechend Fig. 1 durch eine zweite Ausführungsform;
- Fig. 4
- einen Schnitt entsprechend Fig. 1 und 3 durch eine dritte Ausführungsform;
- Fig. 5
- einen Schnitt entsprechend Fig. 1,3 und 4 durch eine vierte Ausführungsform.
- Fig. 1
- an axial partial section through a first embodiment of a disc roller according to the invention;
- Fig. 2
- a section along the line II-II in Fig. 1;
- Fig. 3
- a section corresponding to FIG. 1 by a second embodiment;
- Fig. 4
- a section corresponding to Figures 1 and 3 through a third embodiment.
- Fig. 5
- a section corresponding to Figs. 1,3 and 4 through a fourth embodiment.
Die erfindungsgemäße Scheibenrolle umfaßt ein Tragrohr 1, welches zu seiner internen Kühlung von einem axialen Innenrohr 2 durchsetzt ist. Auf dem Tragrohr 1 ist eine Mehrzahl von Scheiben 3 angeordnet, von denen jeweils nur eine dargestellt ist. Die Längenabschnitte zwischen den Scheiben und auch am Ende des Tragrohres sind von einer Isolierung 4 umgeben.The disc roller according to the invention comprises a
Jede Scheibe 3 sitzt auf zwei seitlichen Trageinrichtungen 5 und 6 auf und ist mit letzteren durch Bolzen 7 verbunden. Die Trageinrichtungen bestehen, wie deutlich aus Fig. 2 ersichtlich, aus Flanschsegmenten und sind mit dem Tragrohr 1 verschweißt. Auch die Scheibe 3 besteht gemäß Fig. 2 aus Segmenten, und zwar aus zwei Segmenten, die in Umfangsrichtung direkt aneinander anschließen.Each
Die Scheiben 3 stehen mit dem Tragrohr 1 nicht direkt in wärmeübertragender Berührung. Dementsprechend ergibt sich eine thermisch günstige Konstruktion. Zur Beeinflussung des Wärmeübergangs ist der Hohlraum, der sich zwischen den beiden Führungseinrichtungen 5 und 6, der Scheibe 3 und dem Tragrohr 1 bildet, mit Isoliermaterial 8 gefüllt.The
Die Ausführungsform nach Fig. 3 unterscheidet sich von der nach den Figuren 1 und 2 dadurch, daß die Scheibe 3 auf ihrem Innenumfang einen umlaufenden, schmalen Steg 9 trägt. Der zwischen der Scheibe 3 und dem Tragrohr 1 gebildete, seitlich von den Führungseinrichtungen 5 und 6 begrenzte Hohlraum ist dadurch seitlich nach außen verlängert, was die Wärmeübergangsverhältnisse positiv beeinflußt. Teile der Bolzen 7 werden mit dem Isoliermaterial 8 überdeckt.The embodiment according to FIG. 3 differs from that according to FIGS. 1 and 2 in that the
Bei der Ausführungsform nach Fig. 4 sind zwei Stege 9 vorgesehen, und zwar schließen sich diese seitlich an die Trageinrichtungen 5 und 6 an.In the embodiment according to FIG. 4, two
Letzteres ist bei der Ausführungsform nach Fig. 5 nicht der Fall. Hier liegen die beiden Stege 9 im Abstand nicht nur zueinander, sondern auch zu den seitlichen Trageinrichtungen 5 und 6.The latter is not the case in the embodiment according to FIG. 5. Here, the two
Ferner unterscheidet sich die Ausführungsform nach Fig. 5 von denen nach den Figuren 1 bis 4 dadurch, daß die Trageinrichtung 6 mit einer Halterung 10 verschweißt ist, die ihrerseits mit dem Tragrohr 1, wie in der unteren Hälfte von Fig. 5 angedeutet, verschraubt wird. Die Trageinrichtung 5 stützt sich lediglich lose auf dem Tragrohr 1 ab. Dabei sind die Bolzen 7 als Kopfbolzen ausgebildet und, abweichend von den Fig. 1, 3 und 4, lediglich einseitig mit der Trageinrichtung 6 verschweißt.Furthermore, the embodiment according to FIG. 5 differs from that according to FIGS. 1 to 4 in that the
Im Rahmen der Erfindung sind ohne weiteres Abwandlungsmöglichkeiten gegeben. So kann die Abstützung der Scheiben auf den Trageinrichtungen anders gestaltet werden, beispielsweise derart, daß die Trageinrichtungen Schultern bilden, in welche die Scheiben eingreifen. Auch können die Bolzen eingeschraubt, durch Splinte gesichert oder von Muttern gehalten werden. Die Scheiben können aus einer Vielzahl von Segmenten bestehen. Gleiches gilt für die Trageinrichtungen. Bezüglich der Anzahl der Stege, die am Innenumfang der Scheiben vorgesehen sind, gibt es keine Beschränkung. Als Isoliermaterial für den Hohlraum innerhalb der Scheiben kommt jedes geeignete Material in Frage. Auch kann u.U. der Hohlraum alleine ohne Ausfüllung durch Isoliermaterial eine ausreichende Wirkung erzeugen.Within the scope of the invention, modification options are readily available. For example, the support of the disks on the support devices can be designed differently, for example in such a way that the support devices form shoulders into which the disks engage. The bolts can also be screwed in, secured with split pins or held by nuts. The disks can consist of a large number of segments. The same applies to the supporting devices. There is no restriction on the number of ridges that are provided on the inner circumference of the disks. As insulation material for the cavity Any suitable material can be used within the panes. The cavity can also produce a sufficient effect alone without being filled with insulating material.
Claims (6)
- A disk roller for roller hearth furnaces with a rotatable, internally cooled tubular support (1), a plurality of disks (3) arranged at an axial distance from each other on the tubular support and firmly connected thereto and an insulation (4) surrounding the tubular support next to the disks characterised in that each disk (3)rests on two side support elements (5, 6) which rest on the tubular support (1) and are connected to the appertaining disk by means of axial bolts (7), at least one of the two support elements being directly and firmly connected to the tubular support.
- A disk roller according to claim 1, characterised in that the inside circumference of each disk exhibits at least one circumferential narrow bridge (9) perforated by the bolts (7).
- A disk roller according to claim 1 or 2, characterised in that the space between support elements (5, 6), the appertaining disk (3) and the tubular support (1) is filled with insulating material (8).
- A disk roller according to any one of claims 1 to 3, characterised in that each of the disks (3) consists of at least two segments adjacent to each other in circumferential direction.
- A disk roller according to any one of claims 1 to 4, characterised in that each of the support elements (5 and 6) consists of flange segments.
- A disk roller according to any one of claims 1 to 5, characterised in that the support elements (5, 6) permanently connected to the tubular support (1) are each welded to a bracket (10) which is screwed onto the tubular support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90125531T ATE95915T1 (en) | 1990-02-24 | 1990-12-27 | DISC ROLLER FOR ROLLER HEART FURNACES. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4005900A DE4005900A1 (en) | 1990-02-24 | 1990-02-24 | DISC ROLLER FOR ROLLER OVENS |
| DE4005900 | 1990-02-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0444312A1 EP0444312A1 (en) | 1991-09-04 |
| EP0444312B1 true EP0444312B1 (en) | 1993-10-13 |
Family
ID=6400916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90125531A Expired - Lifetime EP0444312B1 (en) | 1990-02-24 | 1990-12-27 | Diskroller for a roller hearth furnace |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0444312B1 (en) |
| AT (1) | ATE95915T1 (en) |
| DE (2) | DE4005900A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5362230A (en) * | 1993-03-24 | 1994-11-08 | Italimpianti Of America, Inc. | Rolls for high temperature roller hearth furnaces |
| US5918719A (en) * | 1996-12-27 | 1999-07-06 | Kubota Corporation | Tire roller for transporting slabs |
| DE10012940A1 (en) * | 2000-03-16 | 2001-09-20 | Loi Thermprocess Gmbh | Disc roller for roller hearth furnace includes circumferentially-spaced rounded elevations in its supporting sections, which engage carrier ring depressions |
| DE10047046A1 (en) | 2000-09-22 | 2002-04-11 | Sms Demag Ag | Furnace roll used for transporting continuously cast material from a continuous casting plant comprises a shaft with coolant channels arranged outside of the furnace, and supporting rings arranged on the shaft using a receiving bore |
| KR100578468B1 (en) * | 2004-05-20 | 2006-05-10 | 대한동방 주식회사 | Insulation roll |
| DE102014224445A1 (en) | 2014-11-28 | 2016-06-02 | Schmidt + Clemens Gmbh & Co. Kg | Uncooled oven roll, and method of making an uncooled oven roll |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1923036A (en) * | 1928-02-01 | 1933-08-15 | George J Hagan Company | Conveyer mechanism |
| FR782011A (en) * | 1933-11-15 | 1935-05-27 | Roller improvements for conveyor ovens | |
| DE765909C (en) * | 1940-11-24 | 1953-02-09 | Herbert Dipl-Ing Schaefer | Roll for roller corridors in heat ovens |
| US3456931A (en) * | 1967-02-09 | 1969-07-22 | Philip Carey Corp | Asbestos millboard conveyor rolls for high temperature use |
| US4352230A (en) * | 1980-01-11 | 1982-10-05 | New Hudson Corporation | Fiber covered roller for high temperature applications |
| DE3740620C1 (en) * | 1987-12-01 | 1988-06-23 | Didier Eng | Conveying roller for a roller hearth furnace |
-
1990
- 1990-02-24 DE DE4005900A patent/DE4005900A1/en not_active Withdrawn
- 1990-12-27 DE DE90125531T patent/DE59003089D1/en not_active Expired - Lifetime
- 1990-12-27 EP EP90125531A patent/EP0444312B1/en not_active Expired - Lifetime
- 1990-12-27 AT AT90125531T patent/ATE95915T1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0444312A1 (en) | 1991-09-04 |
| ATE95915T1 (en) | 1993-10-15 |
| DE4005900A1 (en) | 1991-08-29 |
| DE59003089D1 (en) | 1993-11-18 |
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