EP0425926B1 - Suction roll for conveying a web of material - Google Patents
Suction roll for conveying a web of material Download PDFInfo
- Publication number
- EP0425926B1 EP0425926B1 EP90120072A EP90120072A EP0425926B1 EP 0425926 B1 EP0425926 B1 EP 0425926B1 EP 90120072 A EP90120072 A EP 90120072A EP 90120072 A EP90120072 A EP 90120072A EP 0425926 B1 EP0425926 B1 EP 0425926B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller body
- material web
- cylindrical
- stator
- edges
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H20/00—Advancing webs
- B65H20/12—Advancing webs by suction roller
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/13—Details of longitudinal profile
- B65H2404/136—Details of longitudinal profile with canals
- B65H2404/1362—Details of longitudinal profile with canals vacuum
Definitions
- the porous cylinder jacket of a web guide roller consists of porous sintered metal or ceramic material with a pore size between 1-45 ⁇ m, the cylindrical outer surface being brought to a surface quality free of elevations.
- DE-A-14 74 973 proposes an inner ring body consisting of two chambers. in which the part wrapped in the web is subjected to negative pressure and the other part is under atmospheric pressure and cross-sectional constrictions are provided between the two chambers.
- the suction roller arrangement consists of a hollow cylindrical roller body (1), preferably made of stainless VA steel, which is firmly connected at the end faces to the steel disks (13, 14) via screw connections (7).
- the roller body is rotatably mounted on the shaft (8, 15) via ball bearings (4, 5, 5 '). It consists of porous sintered metal and is machined on the outside diameter to run exactly to the finished inside diameter.
- the roller body rotates around the stator (2), which, as shown in FIG.
- the radial distance (a) from the rotor (1) and the polygon surfaces in the area of the holes (10) is, as can be seen in FIG. 3, about 10 mm and at the polygon edges (16) and in the edge areas (9, 9 ') 0 , 1 to 0.3 mm (b) in order to draw in as little leak air as possible.
- the pore size of the sintered metal roller body (1) in the area of the polygon surfaces of the stator is between 30 to 70 ⁇ m and in the edge areas (9, 9 ') is preferably between 10 to 30 ⁇ m.
- the edge areas (9, 9 ') of the sintered body can decrease continuously to zero starting from the lateral edges of the stator (2) to the edge of the roller body (1).
- the intake manifold (3) is pressurized with a negative pressure of 60 - 90 mbar using a normal radial fan (not shown).
- roller bodies known from the prior art and consisting of sintered metal and having pore sizes of 2 to 5 ⁇ m require a pressure of up to 6 bar in order to achieve sufficient torque transmission for the material web.
- the cylindrical outside (17) of the roller body (1) is brought to the required elevation-free surface quality by a triple machining process, namely turning, grinding and subsequent polishing.
- This also has the advantage that the pore size on the surface of the roller body is somewhat smaller than on the inside, so that dust and abrasion particles from the material web, which penetrate into the roller body, are sucked through the pores of the sintered material and released into the exhaust air.
- the surface quality of the roller body is improved by the machining process so that it is also suitable for the transport of extremely sensitive magnetic tapes at high machine speeds.
- the smaller pore size of the edge regions (9, 9 ') of the roller body improves the adhesion of the material web to the edges.
- this also increases the mechanical strength in the edge regions of the roller body for the attachment of the fastening threads for the screws (7).
- roller bodies according to the invention can be located at all possible places on a pouring machine, for example at the casting station, before and after drying, as well as calendering and when winding up the finished material web. With its coated front side or with its coated or uncoated back side, the material web can be guided over the roller bodies as soon as the coating has dried.
- the cylindrical surface of the sintered tube body had a width of 760 mm.
- the vacuum inside the stator was 75 mbar.
- the wrap angle of the web was 260 °.
- the pore size in the middle area was 50 ⁇ m and in the 100 mm wide edge areas on both sides 20 ⁇ m.
- the surface of the magnetic tape touching the roller body showed no marks or deformations and no measurable abrasion and the pores of the roller body did not clog even after months of production.
Description
Die Erfindung betrifft eine Saugwalzenanordnung zum Fördern einer Materialbahn, gemäß dem Oberbegriff des Anspruches 1.The invention relates to a suction roll arrangement for conveying a material web, according to the preamble of
Derartige Saugwalzen finden beispielsweise Anwendung zur Umwandlung eines Drehmoments in Zugspannung bei Materialbahnen in Begießmaschinen, beispielsweise zum Beguß von Fotopapier, Film oder Magnetband, wenn die Haftreibung zwischen der übertragenden Walze und der Bahn nicht ausreicht.Such suction rolls are used, for example, for converting a torque into tensile stress in material webs in pouring machines, for example for casting photo paper, film or magnetic tape, if the static friction between the transferring roller and the web is not sufficient.
Aus der GB-A-988 887 ist eine Saugwalzenanordnung der eingangs genannten gattungsmäßigen Art bekannt. Danach besteht der poröse Zylindermantel einer Bahnführungsrolle aus porösem Sintermetall oder Keramikmaterial mit einer Porengröße zwischen 1 - 45 µm, wobei die zylindrische Außenfläche auf eine von Erhebungen freie Überflächengüte gebracht ist.From GB-A-988 887 a suction roll arrangement of the generic type mentioned above is known. Thereafter, the porous cylinder jacket of a web guide roller consists of porous sintered metal or ceramic material with a pore size between 1-45 µm, the cylindrical outer surface being brought to a surface quality free of elevations.
Bei den bekannten Saugwalzen, bei denen das in der Saugwalze angebrachte Dichtungselement den nicht von der Bahn umschlungenen Teil der Walze innen unter geringer Überlappung abdeckt, tritt Leckluft durch die Mantelperforation in den Dichtungsspalt zwischen Mantel und Dichtungssegment ein und verursacht an den Auflauf- und Ablaufstellen der Bahn ein unerwünschtes Flattern derselben, welches die gleichmäßige Fortbewegung der Bahn beeinträchtigt. Zur Behebung dieses Fehlers wird in der DE-A-14 74 973 ein aus zwei Kammern bestehender innerer Ringkörper vorgeschlagen. bei dem der von der Bahn umschlungene Teil mit Unterdruck beaufschlagt ist und der andere Teil unter Atmosphärendruck steht und wobei zwischen beiden Kammern Querschnittsverengungen vorgesehen sind.In the known suction rolls, in which the sealing element attached in the suction roll covers the part of the roll that is not wrapped by the web, with slight overlap, leakage air enters through the jacket perforation in the sealing gap between the jacket and the sealing segment and causes at the run-up and discharge points of the An unwanted fluttering of the same, which impairs the smooth movement of the web. To remedy this error, DE-A-14 74 973 proposes an inner ring body consisting of two chambers. in which the part wrapped in the web is subjected to negative pressure and the other part is under atmospheric pressure and cross-sectional constrictions are provided between the two chambers.
Aus der GB-A-983 951 ist bereits bekannt, den Walzenkörper selbst mit einer durchlässigen Mantelfläche zu versehen. Diese Mantelfläche liegt bei der Führung einer Materialbahn zu einem Teil frei, so daß, weil der gesamte Umfang des Walzenmantels unter Vakuum gesetzt werden muß, ein außergewöhnlich hohes Vakuum und damit erhebliche Energie erforderlich sind. Aus diesem Grunde werden dabei Maskenanordnungen für eine randweise Anpassung an die Breite einer Materialbahn vorgeschlagen. Dieses ist umständlich und erfaßt nicht genau die Randbereiche. Außerdem ist der Aufwand im Betrieb erheblich, die Führung der Materialbahn besonders an den Rändern unsicher und bei Zugänglichkeit wird Schmutz eingesaugt. Des weiteren ergeben sich Probleme hinsichtlich des anzulegenden Vakuums, damit in dem abgedeckten Bereich keine Eindrücke am Walzenmantel entstehen, der aus porösem Material, beispielsweise aus Sintermaterial, besteht. Unabhängig davon liegt aber immer der nicht von der Materialbahn abgedeckte Teil des Walzenmantels frei, so daß sich dieser poröse Walzenmantel mit der Zeit zusetzt. Daher ist eine periodische Reinigung erforderlich, die einen Ausbau der Saugwalzenanordnung notwendig macht.From GB-A-983 951 it is already known to provide the roller body itself with a permeable outer surface. This surface area is partially exposed when guiding a material web, so that, because the entire circumference of the roll shell has to be placed under vacuum, an extraordinarily high vacuum and thus considerable energy are required. For this reason, mask arrangements are proposed for edge-to-edge adaptation to the width of a material web. This is cumbersome and does not exactly capture the edge areas. In addition, the effort in operation is considerable, the guidance of the material web is particularly unsafe at the edges and dirt is sucked in when it is accessible. Furthermore, problems arise with regard to the vacuum to be applied, so that no impressions occur in the covered area on the roll shell, which consists of porous material, for example sintered material. Regardless of this, however, the part of the roll shell which is not covered by the material web is always exposed, so that this porous roll shell becomes clogged over time. Therefore, periodic cleaning is required, which makes it necessary to remove the suction roller arrangement.
Diese Nachteile sollen von einer in der DE-A-31 11 894 beschriebenen Saugwalzenanordnung vermieden werden. Bei dieser befinden sich in der Außenfläche des Mantels des zylindrischen Walzenkörpers in Abständen voneinander angeordnete Längsnuten, welche von aus luftdurchlässigem Material bestehende Leisten abgedeckt sind. Der Walzenkörper ist an seinen Enden durch mit ihm drehfest verbundene Verschleißscheiben abgeschlossen, an die jeweils ein Dichtring federnd angedrückt wird. Der unter dem Umschlingungswinkel der Materialbahn liegende Innenraum ist mit Unterdruck beaufschlagt, während der nicht umschlungene Raum über in den Dichtungsringen angeordnete Aussparungen mit Druckluft beaufschlagt ist, der die Materialbahn von dem Walzenkörper abhebt und zugleich angesaugten Schmutz aus den porösen Leisten herausblasen soll. Eine solche Anordnung ist jedoch kompliziert und dadurch nur sehr kostspielig herzustellen und hat außerdem den Nachteil, daß bei hohen Laufgeschwindigkeiten ein hoher Verschleiß zu erwarten ist, wodurch die Betriebszeiten erniedrigt und die Produktionskosten erhöht werden.These disadvantages are to be avoided by a suction roller arrangement described in DE-A-31 11 894. In this there are longitudinal grooves arranged at intervals from one another in the outer surface of the jacket of the cylindrical roller body, which are covered by strips made of air-permeable material. The roller body is closed at its ends by wear disks connected to it in a rotationally fixed manner, to each of which a sealing ring is resiliently pressed. The one under the wrap angle of the material web lying interior is subjected to negative pressure, while the non-looped space is pressurized with compressed air via recesses arranged in the sealing rings, which lift the material web from the roller body and at the same time to blow sucked-in dirt out of the porous strips. However, such an arrangement is complicated and therefore only very expensive to produce and also has the disadvantage that high wear is to be expected at high running speeds, as a result of which the operating times are reduced and the production costs are increased.
Daher bestand die Aufgabe, eine Saugwalzenanordnung der eingangs genannten Art so zu verbessern, daß
- ein relativ geringer Unterdruck am Gebläse ausreicht, um eine genügende Haftung zwischen Saugwalze und Materialbahn energiesparend zu erreichen
- eine Ansammlung von Schmutz in der Mantelfläche vermieden wird und ebenso ein Zusetzen des porösen Walzenkörpers
- die Walzenanordnung sehr rundlaufgenau ist, einen einfachen Aufbau hat und lange Produktionszeiten ermöglicht.
- a relatively low vacuum on the blower is sufficient to achieve sufficient adhesion between the suction roll and the material web in an energy-saving manner
- an accumulation of dirt in the outer surface is avoided and also a clogging of the porous roller body
- the roller arrangement is very concentric, has a simple structure and enables long production times.
Erfindungsgemäß wurde die Aufgabe gelöst mit einer Saugwalzenanordnung mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen. Weitere vorteilhafte Ausgestaltungen der Erfindung gehen aus den Unteransprüchen hervor. Nachstehend wird die Erfindung anhand der Zeichnungen näher erläutert und zwar zeigt
Figur 1- einen Längsschnitt durch die erfindungsgemäße Saugwalzenanordnung entlang der Linie I der
Figur 2 Figur 2- einen Querschnitt durch die entsprechende Anordnung
- Figur 3
- einen Längsschnitt durch einen Teil der Anordnung entlang der Linie III der
Figur 2.
- Figure 1
- 2 shows a longitudinal section through the suction roller arrangement according to the invention along the line I in FIG. 2
- Figure 2
- a cross section through the corresponding arrangement
- Figure 3
- 2 shows a longitudinal section through part of the arrangement along the line III in FIG. 2.
In der dargestellten Ausführungsform besteht die Saugwalzenanordnung aus einem vorzugsweise aus nichtrostendem VA-Stahl bestehenden hohlzylindrischen Walzenkörper (1), welcher an den Stirnseiten mit den Stahlscheiben (13, 14) über Schraubverbindungen (7) fest verbunden ist. Der Walzenkörper ist über Kugellagerungen (4, 5, 5') an dem Schaft (8, 15) drehbar gelagert. Er besteht aus porösem Sintermetall und ist am Außendurchmesser rundlaufgenau zum fertigen Innendurchmesser bearbeitet. Der Walzenkörper rotiert um den Stator (2), der, wie Figur 2 zeigt, in dem von der Materialbahn (6) umschlungenen Teil polygonförmig aufgebaut ist und an den Polygonflächen mit Ausnehmungen beziehungsweise Löchern (10) zur Übertragung der Ansaugluft in den Innenraum (11) des Stators versehen ist, während er in dem nicht von der Materialbahn umschlungenen Teil eine zylindrische Außenfläche ohne Löcher hat. Er besteht vorzugsweise aus Aluminium. Der radiale Abstand (a) vom Rotor (1) und den Polygonflächen im Bereich der Löcher (10) beträgt, wie aus Figur 3 hervorgeht, etwa 10 mm und an den Polygonkanten (16) sowie in den Randbereichen (9, 9') 0,1 bis 0,3 mm (b), um dadurch möglichst wenig Leckluft anzusaugen. Erfindungswesentlich ist, daß die Porengröße des Sintermetall-Walzenkörpers (1) im Bereich der Polygonflächen des Stators zwischen 30 bis 70 µm und in den Randbereichen (9, 9') vorzugsweise zwischen 10 bis 30 µm beträgt. Durch diese konstruktive Maßnahme befindet sich im Laufbereich der Materialbahn ein geringerer Luftwiderstand als in den Randbereichen des Walzenkörpers, so daß durch einen relativ geringen Unterdruck trotzdem eine ausreichende Haftung zwischen Saugwalze und Bahn erreicht wird. Der wesentlich höhere Luftwiderstand in den Randbereichen vermindert die Leckluft und verbessert die Haftung der Bahnränder. In einer Variante kann die Porengröße der Randbereiche (9, 9') des Sinterkörpers ausgehend von den seitlichen Kanten des Stators (2) bis zum Rand des Walzenkörpers (1) kontinuierlich bis Null abnehmen. Der Ansaugstutzen (3) wird über ein (nicht gezeichnetes) normales Radialgebläse mit einem Unterdruck von 60 - 90 mbar beaufschlagt. Dagegen benötigen aus dem Stand der Technik bekannte aus Sintermetall bestehende Walzenkörper mit Porengrößen von 2 bis 5 µm einen Druck von bis zu 6 bar, um auf genügende Drehmomentübertragung für die Materialbahn zu kommen.In the embodiment shown, the suction roller arrangement consists of a hollow cylindrical roller body (1), preferably made of stainless VA steel, which is firmly connected at the end faces to the steel disks (13, 14) via screw connections (7). The roller body is rotatably mounted on the shaft (8, 15) via ball bearings (4, 5, 5 '). It consists of porous sintered metal and is machined on the outside diameter to run exactly to the finished inside diameter. The roller body rotates around the stator (2), which, as shown in FIG. 2, has a polygonal shape in the part wrapped by the material web (6) and on the polygon surfaces with recesses or holes (10) for transferring the intake air into the interior (11 ) of the stator is provided while it has a cylindrical outer surface without holes in the part not wrapped by the material web. It is preferably made of aluminum. The radial distance (a) from the rotor (1) and the polygon surfaces in the area of the holes (10) is, as can be seen in FIG. 3, about 10 mm and at the polygon edges (16) and in the edge areas (9, 9 ') 0 , 1 to 0.3 mm (b) in order to draw in as little leak air as possible. It is essential to the invention that the pore size of the sintered metal roller body (1) in the area of the polygon surfaces of the stator is between 30 to 70 µm and in the edge areas (9, 9 ') is preferably between 10 to 30 µm. As a result of this constructive measure, there is less air resistance in the running area of the material web than in the edge areas of the roller body, so that a relatively low negative pressure results nevertheless sufficient adhesion between suction roll and web is achieved. The significantly higher air resistance in the edge areas reduces the leakage air and improves the adhesion of the web edges. In a variant, the pore size of the edge regions (9, 9 ') of the sintered body can decrease continuously to zero starting from the lateral edges of the stator (2) to the edge of the roller body (1). The intake manifold (3) is pressurized with a negative pressure of 60 - 90 mbar using a normal radial fan (not shown). In contrast, roller bodies known from the prior art and consisting of sintered metal and having pore sizes of 2 to 5 μm require a pressure of up to 6 bar in order to achieve sufficient torque transmission for the material web.
Die zylindrische Außenseite (17) des Walzenkörpers (1) wird durch einen dreifachen Bearbeitungsvorgang, nämlich Drehen, Schleifen und nachfolgendes Polieren auf die erforderliche erhebungsfreie Oberflächengüte gebracht. Dies hat zugleich den Vorteil, daß die Porengröße an der Oberfläche des Walzenkörpers etwas kleiner ist als im Inneren, so daß Staub und Abriebteilchen aus der Materialbahn, die in den Walzenkörper dringen, durch die Poren des Sintermaterials abgesaugt und in die Abluft gegeben werden. Außerdem wird durch den Bearbeitungsvorgang die Oberflächengüte des Walzenkörpers so verbessert, daß dieser auch für den Transport von äußerst empfindlichen Magnetbändern bei hohen Maschinengeschwindigkeiten geeignet ist. Ferner wurde gefunden, daß die geringere Porengröße der Randbereiche (9, 9') des Walzenkörpers die Haftung der Materialbahn an den Rändern verbessert. Schließlich wird dadurch auch die mechanische Festigkeit in den Randbereichen des Walzenkörpers für die Anbringung der Befestigungsgewinde für die Schrauben (7) erhöht.The cylindrical outside (17) of the roller body (1) is brought to the required elevation-free surface quality by a triple machining process, namely turning, grinding and subsequent polishing. This also has the advantage that the pore size on the surface of the roller body is somewhat smaller than on the inside, so that dust and abrasion particles from the material web, which penetrate into the roller body, are sucked through the pores of the sintered material and released into the exhaust air. In addition, the surface quality of the roller body is improved by the machining process so that it is also suitable for the transport of extremely sensitive magnetic tapes at high machine speeds. It has also been found that the smaller pore size of the edge regions (9, 9 ') of the roller body improves the adhesion of the material web to the edges. Finally, this also increases the mechanical strength in the edge regions of the roller body for the attachment of the fastening threads for the screws (7).
Versuche zeigten, daß zur Übertragung eines genügend großen schlupffreien Drehmoments auf die Materialbahn ein Umschlingungswinkel der Bahn um den Walzenkörper von 180 bis 300°, vorzugsweise 240 - 280°, geeignet ist.Tests have shown that a wrap angle of the web around the roll body of 180 to 300 °, preferably 240-280 °, is suitable for transferring a sufficiently large slip-free torque to the material web.
Die erfindungsgemäßen Walzenkörper können sich an allen möglichen Stellen einer Begießmaschine befinden, beispielsweise an der Gießstation, vor und nach der Trocknung sowie der Kalanderung und beim Aufwickeln der fertigen Materialbahn. Die Materialbahn kann mit ihrer beschichteten Vorderseite oder mit ihrer beschichteten oder unbeschichteten Rückseite, sobald die Beschichtung getrocknet ist, über die Walzenkörper geführt werden.The roller bodies according to the invention can be located at all possible places on a pouring machine, for example at the casting station, before and after drying, as well as calendering and when winding up the finished material web. With its coated front side or with its coated or uncoated back side, the material web can be guided over the roller bodies as soon as the coating has dried.
In einer Ausführung der Erfindung hatte die zylindrische Fläche des Sinterrohrkörpers eine Breite von 760 mm. Über sie lief mit 340 m/Minute eine Magnetbandbahn von 650 mm Breite und einer Gesamtdicke von flexiblem Schichtträger bestehend aus Polyethylenterephthalat und darauf gegossener Magnetschicht von 16 µm. Der Unterdruck im Innenraum des Stators betrug 75 mbar. Der Umschlingungswinkel der Bahn war 260°. Die Porengröße im mittleren Bereich betrug 50 µm und in den beiderseitigen je 100 mm breiten Randbereichen 20 µm. Die Oberfläche des den Walzenkörper berührenden Magnetbandes wies keinerlei Abdrücke oder Deformationen und auch keinen meßbaren Abrieb auf und die Poren des Walzenkörpers setzten sich auch nach monatelangem Produktionsbetrieb nicht zu.In one embodiment of the invention, the cylindrical surface of the sintered tube body had a width of 760 mm. A magnetic tape web with a width of 650 mm and a total thickness of flexible layer support consisting of polyethylene terephthalate and a magnetic layer of 16 µm cast on it ran over it at 340 m / minute. The vacuum inside the stator was 75 mbar. The wrap angle of the web was 260 °. The pore size in the middle area was 50 µm and in the 100 mm wide edge areas on both sides 20 µm. The surface of the magnetic tape touching the roller body showed no marks or deformations and no measurable abrasion and the pores of the roller body did not clog even after months of production.
Claims (5)
- A suction roller arrangement for transporting a material web, in particular a magnetic coating cast on a plastics substrate, having a rotatably mounted hollow cylindrical roller body (1) consisting of porous sintered metal, the inner space (11) under the angle of wrap of the material web (6) being subjected to reduced pressure and the cylindrical outer surface (17) of the roller body being brought to a surface quality free of projections by turning, grinding and polishing, so that the porosity at the cylindrical outer surface is smaller than the porosity in the interior of the sintered metal body, wherein the inner space (11) formed by the hollow cylindrical rotatable roller body is provided with a stator (2) which is polygonal in the region of the outer surface formed by the angle of wrap of the material web (6) and is provided with holes (10) through which air is sucked into the inner space (11), while the remaining surface which is not wrapped around is cylindrical and has no holes, the radial distance (a) of the polygonal surfaces of the stator from the roller body is about 10 mm and the radial distance (b) between the polygonal edges or the edge regions and the roller body is from 0.1 to 0.3 mm and the pore size is from 35 to 70 µm in the middle cylindrical region of the roller body (1) and not more than 30 µm in the region between the polygonal edges (16) and the lateral stator edges.
- A suction roller arrangement as claimed in claim 1, wherein the middle part of the material web (6) runs over the cylinder surface (17) having the larger pores and the two edges of said web run over the cylindrical edge surfaces (9, 9') of the roller body.
- A suction roller arrangement as claimed in claim 1 or 2, wherein the pore size at the edge regions (9, 9') of the cylindrical outer surface (17) of the roller body (1) from the edge of the stator (2) up to the two edges decreases continuously to zero.
- A suction roller arrangement as claimed in any of claims 1 to 3, wherein the roller body (1) is composed of sintered VA stainless steel material and the stator (2) is composed of aluminum.
- A suction roller arrangement as claimed in any of claims 1 to 3, wherein the angle of wrap of the material web on the roller body is from 180 to 300°, preferably from 240 to 280°.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3936286A DE3936286A1 (en) | 1989-11-01 | 1989-11-01 | SUCTION ROLLER ARRANGEMENT FOR CONVEYING A MATERIAL RAIL |
| DE3936286 | 1989-11-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0425926A1 EP0425926A1 (en) | 1991-05-08 |
| EP0425926B1 true EP0425926B1 (en) | 1993-08-25 |
Family
ID=6392604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90120072A Expired - Lifetime EP0425926B1 (en) | 1989-11-01 | 1990-10-19 | Suction roll for conveying a web of material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0425926B1 (en) |
| JP (1) | JPH03166152A (en) |
| KR (1) | KR910009547A (en) |
| DE (2) | DE3936286A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20020772U1 (en) * | 2000-12-07 | 2002-04-18 | Brueckner Maschbau | suction roll |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9420707U1 (en) * | 1994-12-24 | 1995-02-16 | Steuer Armin | Embossing rotary machine |
| US5727749A (en) * | 1996-02-05 | 1998-03-17 | Presstek, Inc | Automatic plate-loading cylinder with constant circumferential tension |
| WO1998008765A1 (en) * | 1996-08-26 | 1998-03-05 | Emtec Magnetics Gmbh | Continuous material guide roller |
| JP5352034B2 (en) * | 2009-02-16 | 2013-11-27 | 日本タングステン株式会社 | Adsorption roll |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB983951A (en) * | 1959-12-14 | 1965-02-24 | Alexander Samuel Baxter | Improvements in and relating to the feeding of thin films |
| GB988887A (en) * | 1961-05-01 | 1965-04-14 | Eastman Kodak Co | Web guiding and supporting means |
| DE1474973B2 (en) * | 1966-08-01 | 1970-08-13 | Agfa-Gevaert Ag, 5090 Leverkusen | Suction roll for transmitting a torque |
| US3630424A (en) * | 1970-06-17 | 1971-12-28 | Eastman Kodak Co | Drilled nonported vacuum drum |
| US4277010A (en) * | 1980-04-10 | 1981-07-07 | John Dusenbery Company, Inc. | Vacuum roller for transporting a web |
-
1989
- 1989-11-01 DE DE3936286A patent/DE3936286A1/en active Granted
-
1990
- 1990-10-19 DE DE90120072T patent/DE59002470D1/en not_active Expired - Fee Related
- 1990-10-19 EP EP90120072A patent/EP0425926B1/en not_active Expired - Lifetime
- 1990-10-29 KR KR1019900017317A patent/KR910009547A/en not_active Application Discontinuation
- 1990-10-31 JP JP2292247A patent/JPH03166152A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20020772U1 (en) * | 2000-12-07 | 2002-04-18 | Brueckner Maschbau | suction roll |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03166152A (en) | 1991-07-18 |
| DE3936286A1 (en) | 1991-05-02 |
| DE59002470D1 (en) | 1993-09-30 |
| DE3936286C2 (en) | 1991-08-22 |
| KR910009547A (en) | 1991-06-28 |
| EP0425926A1 (en) | 1991-05-08 |
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