EP0440971A2 - Control for the path of a web - Google Patents
Control for the path of a web Download PDFInfo
- Publication number
- EP0440971A2 EP0440971A2 EP90125211A EP90125211A EP0440971A2 EP 0440971 A2 EP0440971 A2 EP 0440971A2 EP 90125211 A EP90125211 A EP 90125211A EP 90125211 A EP90125211 A EP 90125211A EP 0440971 A2 EP0440971 A2 EP 0440971A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- rollers
- wedge
- sealing
- roller
- 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
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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
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S277/00—Seal for a joint or juncture
- Y10S277/927—Seal including fluid pressure differential feature
Definitions
- the invention relates to a device for controlling moving material webs in hollow suction cups, the web resting on at least two rollers and a pressure difference in the area of the rollers between the top and bottom of the web.
- Hollow suction cups are preferably used in drying sections where the layer or layers freshly applied to a layer support must not touch the surface of the guide rollers.
- the layers can be photographic or magnetic coatings which are applied to a paper or plastic layer support by means of a casting device known from the prior art.
- a corrugated, wavy web shape is created.
- the web has only one bead.
- the radius of curvature of the bead in the web or the web loop depends on the pressure difference of the web tension. Regardless of the web guide through the dryer, the corrugated web shape ensures that the wrap angle is large enough for a good web run for each roller.
- Hollow suction cups can therefore be used in a wide variety of designs adapted to the respective web guide.
- Flat hollow suction cups are known in which the roller axes lie in one plane and convey the web vertically ascending or descending or horizontally supporting or hanging. If the roller axes lie on a cylindrical surface, then these are hollow suction cups for deflecting the web by, for example, 90 or 180 °, without the cast web surface coming into contact with the rollers.
- the hollow suction cup is also suitable for spatial web guides where the roller axes are no longer parallel.
- DE-AS 19 62 089 describes a drying section with a meandering web guide, in which flat hollow suction cups for up and down guidance and curved suction cups for web deflection are used at the upper ends of the vertical loops.
- DE-PS 15 74 295 describes an application of the hollow cylinder suction device for spatial web guidance by means of rollers arranged in an interlocking manner, while DE-PS 25 01 482 describes parallel, movable rollers which are arranged pivotably against stationary rollers in the web plane.
- the two-roller vacuum cup described in DE-PS 15 97 656 has achieved great technical importance for long, horizontally straight drying sections.
- these drying sections the web is laid on the first route and suspended on vacuum cups on the return route.
- the construction of the hollow suction cups is the same for all types.
- the suction cups consist of at least two freely rotatable rollers, which have a housing under vacuum on the back, which largely seals the rollers against normal air pressure.
- the web is guided over the front of the rollers and pressed against the rollers, behind which there is negative pressure, by the normal air pressure. This creates an increased web pressure against the rollers and a greater wrap around the rollers by sucking in the web.
- the invention had for its object to provide a device of the type mentioned, which dispenses with drivable hollow suction rolls, in which the web tension is kept as low as possible while increasing the lateral stability of the material web and in which the web is as possible without risk of damage such as scratching or folding is carried out exactly.
- Another task was to install the device in a drying section of limited length in the smallest possible number, even at high web speed.
- the task to be solved was to ensure the accessibility of the rollers for cleaning in the device.
- a coated material web (1) runs in the direction of the arrow with the coated side at the top and the carrier side at the bottom over the pair of rollers (2, 3), which together with the suction box (11) and the suction nozzle (4) represent a two-roller vacuum cup known from the prior art.
- the rollers (2, 3) are mounted with journals (9) in the side pieces of the suction box (11). Under the influence of the suction effect, the carrier web wraps around the two rollers in area (5).
- a sealing wedge (6) is attached, the free end of which extends so far towards the center of the web, that it engages under at least the edges (17) of the material web (1) in its curved part.
- the surfaces of the sealing wedge (6) facing the rollers (2, 3) are modeled on the cylindrical outer surface of the rollers and are of a very small size Distance from these in order to suck in as little false air as possible.
- the surface of the sealing wedge (6) facing the underside of the material web runs essentially parallel to the web, as can be seen in FIG. 1b, but can also be inclined inwards.
- the pressure difference between the top and bottom of the curved web (5) is set so that the web hovers just above the sealing wedge.
- the surfaces of the suction box (11) facing the rollers are also designed as sealing strips (7, 8) and are slightly spaced apart from the rollers.
- FIGS. 2a and 2b and 3 A particularly preferred embodiment of the invention can be seen in FIGS. 2a and 2b and 3.
- the sealing wedge (12) has a trough-shaped shape on its side facing the web and does not protrude with the underside as far into the interior (10) between the rollers.
- the side sealing strips (13, 14) of the suction box (11) are attached below the axis of rotation of the rollers, so that the accessibility of the rollers for cleaning is still significantly improved here.
- the trough-shaped design of the sealing wedge which slopes obliquely towards the center of the web in the form of a run-up wedge, as can be seen from FIG or hovers.
- the bevel angle ⁇ of the wedge is a few degrees, preferably 3 °.
- FIG. 3 shows a top view of the device according to the invention according to FIG. 2 and in particular the symmetrical arrangement of the sealing wedges (12, 12 ') on both sides and their wedge-shaped shape narrowing inwards.
- the device according to the invention is three times in a drying section (15). arranged, namely near the entrance, the middle and the exit.
- a suction fan (16) is connected to the three hollow suction devices via intermediate valves (17, 18, 19), the process gas being able to be fed back into the drying section (15) via a fan (20).
- the back of a 67 cm wide plastic carrier web cast with a magnetic layer ran at a speed of 300 m / minute through an approximately 20 m long drying section, which is operated at 140 ° C drying temperature, over several aluminum rollers with a diameter of 80 mm and a width of 75 cm.
- the three pairs of rollers of the hollow suction devices had a radial distance of 10 mm, a sealing wedge, consisting of anodized aluminum as shown in FIGS Rolls in and with a length of 75 mm.
- the side sealing strips (13, 14) of the suction box (11) were each less than 0.5 mm from the roller surfaces.
- the bevel angle ⁇ of the sealing wedge was 3 °.
Landscapes
- Advancing Webs (AREA)
- Paper Feeding For Electrophotography (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Steuern von bewegten Materialbahnen in Walzenhohlsaugern, wobei die Bahn auf mindestens zwei Walzen aufliegt und wobei im Bereich der Walzen zwischen der Ober- und Unterseite der Bahn eine Druckdifferenz besteht.The invention relates to a device for controlling moving material webs in hollow suction cups, the web resting on at least two rollers and a pressure difference in the area of the rollers between the top and bottom of the web.
Hohlsauger werden vorzugsweise in Trockenstrecken eingesetzt, in denen die frisch auf einem Schichtträger aufgetragene Schicht oder Schichten nicht die Oberfläche der Führungswalzen berühren dürfen. Die Schichten können fotografische oder magnetische Beschichtungen sein, welche auf einen Papier- oder Kunststoff-Schichtträger mittels einer aus dem Stand der Technik bekannten Gießvorrichtung aufgebracht werden. Beim Durchlauf der Materialbahn über den Hohlsauger entsteht eine gesickte, wellenförmige Bahnform. Im Grenzfall eines Hohlsaugers mit nur zwei Walzen weist die Bahn nur eine Sicke auf. Der Krümmungsradius der Sicke in der Bahn oder der Bahnschleife hängt von der Druckdifferenz der Bahnspannung ab. Unabhängig von der Bahnführung durch den Trockner stellt die gesickte Bahnform für jede Walze den für einen guten Bahnlauf ausreichend großen Umschlingungswinkel sicher. Daher lassen sich Hohlsauger in den verschiedensten an die jeweilige Bahnführung angepaßten Bauarten einsetzen.Hollow suction cups are preferably used in drying sections where the layer or layers freshly applied to a layer support must not touch the surface of the guide rollers. The layers can be photographic or magnetic coatings which are applied to a paper or plastic layer support by means of a casting device known from the prior art. When the material web passes through the suction cup, a corrugated, wavy web shape is created. In the limit case of a hollow suction device with only two rollers, the web has only one bead. The radius of curvature of the bead in the web or the web loop depends on the pressure difference of the web tension. Regardless of the web guide through the dryer, the corrugated web shape ensures that the wrap angle is large enough for a good web run for each roller. Hollow suction cups can therefore be used in a wide variety of designs adapted to the respective web guide.
Es ist eine bekannte Forderung bei der Konstruktion von solchen Walzenstrecken, daß für jede Walze ein Mindestumschlingungswinkel der Bahn eingehalten werden muß. Hierdurch werden Relativgeschwindigkeiten zwischen Bahn und Walzenoberfläche vermieden, was bei Materialien mit empfindlichen Oberflächen (Filmen oder Magnetband) von Bedeutung ist.It is a known requirement in the construction of such roller tracks that a minimum wrap angle of the web must be observed for each roller. This avoids relative speeds between the web and the roll surface, which is important for materials with sensitive surfaces (films or magnetic tape).
Es sind ebene Hohlsauger bekannt, bei welchen die Walzenachsen in einer Ebene liegen und die Bahn senkrecht auf- oder absteigend oder waagrecht tragend oder hängend fördern. Liegen die Walzenachsen auf einer Zylinderfläche, so sind dies Bogen-Hohlsauger zur Umlenkung der Bahn um beispielsweise 90 oder 180°, ohne daß die begossene Bahnfläche in Kontakt mit den Walzen kommt. Auch für räumliche Bahnführungen, bei denen die Walzenachsen nicht mehr parallel sind, ist der Hohlsauger geeignet. In der DE-AS 19 62 089 ist eine Trockenstrecke mit mäanderförmiger Bahnführung beschrieben, bei der ebene Walzenhohlsauger zur Auf- und Abwärtsführung und Bogenhohlsauger zur Bahnumlenkung an den oberen Enden der Vertikalschleifen eingesetzt sind.Flat hollow suction cups are known in which the roller axes lie in one plane and convey the web vertically ascending or descending or horizontally supporting or hanging. If the roller axes lie on a cylindrical surface, then these are hollow suction cups for deflecting the web by, for example, 90 or 180 °, without the cast web surface coming into contact with the rollers. The hollow suction cup is also suitable for spatial web guides where the roller axes are no longer parallel. DE-AS 19 62 089 describes a drying section with a meandering web guide, in which flat hollow suction cups for up and down guidance and curved suction cups for web deflection are used at the upper ends of the vertical loops.
Die DE-PS 15 74 295 beschreibt eine Anwendung des Walzenhohlsaugers für räumliche Bahnführung mittels gegeneinander verschränkt angeordneter Rollen, während die DE-PS 25 01 482 parallele, bewegliche Rollen beschreibt, welche gegen ortsfeste Rollen in der Bahnebene schwenkbar angeordnet sind.DE-PS 15 74 295 describes an application of the hollow cylinder suction device for spatial web guidance by means of rollers arranged in an interlocking manner, while DE-PS 25 01 482 describes parallel, movable rollers which are arranged pivotably against stationary rollers in the web plane.
Eine große technische Bedeutung für lange, horizontal gerade geführte Trockenstrecken hat der in der DE-PS 15 97 656 beschriebene Zwei-Walzenhohlsauger erlangt. In diesen Trockenstrecken wird die Bahn auf dem ersten Weg aufliegend und auf dem Rückweg hängend an Hohlsaugern geführt.The two-roller vacuum cup described in DE-PS 15 97 656 has achieved great technical importance for long, horizontally straight drying sections. In these drying sections, the web is laid on the first route and suspended on vacuum cups on the return route.
Aus der EP 0 017 884 ist ein Luftturbinen-Antrieb für Walzen von Hohlsaugervorrichtungen bekannt, der seine Energie aus der Druckdifferenz zwischen der Ober- und der Unterseite der Materialbahn erhält.From EP 0 017 884 an air turbine drive for rolling hollow suction devices is known, which receives its energy from the pressure difference between the top and the bottom of the material web.
Die Konstruktion der Walzenhohlsauger ist bei allen Typen gleich. Die Hohlsauger bestehen aus mindestens zwei frei drehbar gelagerten Walzen, die auf der Rückseite ein unter Unterdruck stehendes Gehäuse besitzen, welches die Walzen weitgehend gegen den normalen Luftdruck abdichtet. Über die Vorderseite der Walzen wird die Bahn geführt und von dem normalen Luftdruck gegen die Walzen, hinter denen Unterdruck herrscht, gepreßt. Es entsteht so ein erhöhter Bahndruck gegen die Walzen und eine größere Umschlingung der Walzen durch Einsaugen der Bahn.The construction of the hollow suction cups is the same for all types. The suction cups consist of at least two freely rotatable rollers, which have a housing under vacuum on the back, which largely seals the rollers against normal air pressure. The web is guided over the front of the rollers and pressed against the rollers, behind which there is negative pressure, by the normal air pressure. This creates an increased web pressure against the rollers and a greater wrap around the rollers by sucking in the web.
Der Erfindung lag die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art zu schaffen, welche auf antreibbare Hohlsaugerwalzen verzichtet, bei der die Bahnspannung bei gleichzeitig erhöhter Seitenstabilität der Materialbahn möglichst gering gehalten wird und bei der die Bahn ohne Gefahr von Beschädigungen wie Verkratzen oder Falten möglichst genau geführt wird. Eine weitere Aufgabe bestand darin, die Vorrichtung in einer Trockenstrecke von begrenzter Länge in möglichst geringer Anzahl auch bei hoher Bahngeschwindigkeit zu installieren. Schließlich war noch die Aufgabe zu lösen, in der Vorrichtung die Zugänglichkeit der Walzen zwecks Reinigung zu gewährleisten.The invention had for its object to provide a device of the type mentioned, which dispenses with drivable hollow suction rolls, in which the web tension is kept as low as possible while increasing the lateral stability of the material web and in which the web is as possible without risk of damage such as scratching or folding is carried out exactly. Another task was to install the device in a drying section of limited length in the smallest possible number, even at high web speed. Finally, the task to be solved was to ensure the accessibility of the rollers for cleaning in the device.
Erfindungsgemaß wurden die Aufgaben gelöst mit einer Vorrichtung mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen. Weitere Einzelheiten der Erfindung gehen aus den Unteransprüchen, den Zeichnungen und der Beschreibung hervor.According to the invention, the objects were achieved with a device having the features mentioned in the characterizing part of claim 1. Further details of the invention emerge from the subclaims, the drawings and the description.
Die Erfindung wird nun anhand der Zeichnungen näher erläutert und zwar zeigt
- Figur 1 a - b
- eine erfindungsgemäße Ausführungsform im Querschnitt (a) beziehungsweise im Längsschnitt (b)
- Figur 2 a - b
- eine besonders bevorzugte erfindungsgemäße Vorrichtung im Querschnitt (a) beziehungsweise im Längsschnitt (b)
Figur 3- eine Draufsicht auf eine Vorrichtung gemäß
Figur 2 - Figur 4
- eine schematische Anordnung der erfindungsgemäßen Hohlsauger-Vorrichtungen in einer Trockenstrecke.
- Figure 1 a - b
- an embodiment according to the invention in cross section (a) or in longitudinal section (b)
- Figure 2a - b
- a particularly preferred device according to the invention in cross section (a) or in longitudinal section (b)
- Figure 3
- 3 shows a plan view of a device according to FIG. 2
- Figure 4
- a schematic arrangement of the hollow suction devices according to the invention in a drying section.
Wie aus der Figur 1 a zu ersehen, läuft eine beschichtete Materialbahn (1) in Pfeilrichtung mit der beschichteten Seite oben und der Trägerseite unten über das Walzenpaar (2, 3), welche zusammen mit dem Saugkasten (11) und dem Saugstutzen (4) einen aus dem Stand der Technik bekannten Zwei-Walzenhohlsauger darstellen. Die Walzen (2, 3) sind mit Lagerzapfen (9) in den Seitenstücken des Saugkastens (11) gelagert. Unter dem Einfluß der Saugwirkung umschlingt die Trägerbahn die beiden Walzen im Bereich (5).As can be seen from FIG. 1 a, a coated material web (1) runs in the direction of the arrow with the coated side at the top and the carrier side at the bottom over the pair of rollers (2, 3), which together with the suction box (11) and the suction nozzle (4) represent a two-roller vacuum cup known from the prior art. The rollers (2, 3) are mounted with journals (9) in the side pieces of the suction box (11). Under the influence of the suction effect, the carrier web wraps around the two rollers in area (5).
Erfindungswesentlich ist, daß im freien Raum (10) zwischen dem Walzenpaar (2, 3) benachbart der Oberseite der Walzen an den Seitenflächen des Saugkastens (11) beiderseits ein Dichtkeil (6) angebracht ist, dessen freies Ende so weit in Richtung Bahnmitte hineinragt, daß er zumindest die Ränder (17) der Materialbahn (1) in ihrem durchgekrümmten Teil untergreift. Die den Walzen (2, 3) zugekehrten Flächen des Dichtkeils (6) sind der zylindrischen Außenfläche der Walzen nachgebildet und befinden sich in einem sehr geringen Abstand von diesen, um möglichst wenig Falschluft anzusaugen. Die der Unterseite der Materialbahn zugekehrte Fläche des Dichtkeils (6) verläuft, wie aus Figur 1b hervorgeht, im wesentlichen parallel zur Bahn, kann aber auch nach innen abgeschrägt verlaufen. Die Druckdifferenz zwischen Ober- und Unterseite der gekrümmten Bahn (5) wird so eingestellt, daß die Bahn gerade über dem Dichtkeil schwebt. Die den Walzen zugewandten Flächen des Saugkastens (11) sind ebenfalls als Dichtleisten (7, 8) gestaltet und geringfügig von den Walzen beabstandet.It is essential to the invention that in the free space (10) between the pair of rollers (2, 3) adjacent to the top of the rollers on both sides of the suction box (11) a sealing wedge (6) is attached, the free end of which extends so far towards the center of the web, that it engages under at least the edges (17) of the material web (1) in its curved part. The surfaces of the sealing wedge (6) facing the rollers (2, 3) are modeled on the cylindrical outer surface of the rollers and are of a very small size Distance from these in order to suck in as little false air as possible. The surface of the sealing wedge (6) facing the underside of the material web runs essentially parallel to the web, as can be seen in FIG. 1b, but can also be inclined inwards. The pressure difference between the top and bottom of the curved web (5) is set so that the web hovers just above the sealing wedge. The surfaces of the suction box (11) facing the rollers are also designed as sealing strips (7, 8) and are slightly spaced apart from the rollers.
Eine besonders bevorzugte Ausführung der Erfindung geht aus den Figuren 2a und 2b sowie 3 hervor. Hier hat der Dichtkeil (12) an seiner der Bahn zugekehrten Seite eine wannenförmige Gestalt und ragt mit der Unterseite nicht so weit in den Innenraum (10) zwischen den Walzen hinein. Die seitlichen Dichtleisten (13, 14) des Saugkastens (11) sind unterhalb der Drehachse der Walzen angebracht, so daß die Zugänglichkeit der Walzen zwecks Reinigung hier noch wesentlich verbessert ist. Die wannenförmige Ausführung des Dichtkeils, der zur Bahnmitte in der Form eines Anlaufkeils schräg abfällt, wie aus Figur 2b zu erkennen, hat als Vorteil, daß auch bei seitlichem Verlaufen der Bahn, also senkrecht zur Laufrichtung, doch stets die Bahn über dem Dichtkeil beabstandet ist beziehungsweise schwebt. Der Abschrägungswinkel α des Keils beträgt einige Grad, vorzugsweise 3°.A particularly preferred embodiment of the invention can be seen in FIGS. 2a and 2b and 3. Here, the sealing wedge (12) has a trough-shaped shape on its side facing the web and does not protrude with the underside as far into the interior (10) between the rollers. The side sealing strips (13, 14) of the suction box (11) are attached below the axis of rotation of the rollers, so that the accessibility of the rollers for cleaning is still significantly improved here. The trough-shaped design of the sealing wedge, which slopes obliquely towards the center of the web in the form of a run-up wedge, as can be seen from FIG or hovers. The bevel angle α of the wedge is a few degrees, preferably 3 °.
Die Figur 3 zeigt in Aufsicht die erfindungsgemäße Vorrichtung gemäß Figur 2 und besonders die beiderseitige symmetrische Anordnung der Dichtkeile (12, 12') und ihre keilförmig nach innen verengt zulaufende Form. In einer zweckmäßigen Ausführung ist die erfindungsgemäße Vorrichtung, wie aus Figur 4 zu erkennen, dreimal in einer Trockenstrecke (15) angeordnet, nämlich in der Nähe des Eingangs, der Mitte sowie des Ausgangs. Ein Absaugventilator (16) beispielsweise ein Radialventilator ist über Zwischenventile (17, 18, 19) mit den drei Hohlsaugervorrichtungen verbunden, wobei das Prozeßgas über einen Ventilator (20) wieder in die Trockenstrecke (15) eingespeist werden kann.FIG. 3 shows a top view of the device according to the invention according to FIG. 2 and in particular the symmetrical arrangement of the sealing wedges (12, 12 ') on both sides and their wedge-shaped shape narrowing inwards. In an expedient embodiment, the device according to the invention, as can be seen from FIG. 4, is three times in a drying section (15). arranged, namely near the entrance, the middle and the exit. A suction fan (16), for example a radial fan, is connected to the three hollow suction devices via intermediate valves (17, 18, 19), the process gas being able to be fed back into the drying section (15) via a fan (20).
Eine 67 cm breite mit einer Magnetschicht begossene Kunststoffträger-Bahn lief mit ihrer Rückseite mit einer Geschwindigkeit von 300 m/Minute durch eine etwa 20 m lange Trockenstrecke, die mit 140 °C Trockentemperatur betrieben wird, über mehrere Aluminiumwalzen mit einem Durchmesser von 80 mm und einer Breite von 75 cm. Die drei Walzenpaare der Hohlsaugervorrichtungen hatten einen radialen Abstand von 10 mm, in den Innenraum ragte beiderseits ein Dichtkeil, bestehend aus eloxiertem Aluminium wie in Figur 2a, 2b, beziehungsweise 3 dargestellt, mit einem radialen Abstand von etwa 0,5 mm zu der Lauffläche der Walzen und mit einer Länge von 75 mm, hinein. Die seitlichen Dichtleisten (13, 14) des Saugkastens (11) waren jeweils weniger als 0,5 mm von den Walzenflächen beabstandet. Der Abschrägewinkel α des Dichtkeils betrug 3°. Bei einer Druckdifferenz von 4 bis 10 mbar zwischen Ober- und Unterseite der Materialbahn und bei einem Bahnzug von 8 bis 14 kp war eine stabile Steuerung der Materialbahn zu erreichen, ohne daß Beschädigungen beobachtet wurden.The back of a 67 cm wide plastic carrier web cast with a magnetic layer ran at a speed of 300 m / minute through an approximately 20 m long drying section, which is operated at 140 ° C drying temperature, over several aluminum rollers with a diameter of 80 mm and a width of 75 cm. The three pairs of rollers of the hollow suction devices had a radial distance of 10 mm, a sealing wedge, consisting of anodized aluminum as shown in FIGS Rolls in and with a length of 75 mm. The side sealing strips (13, 14) of the suction box (11) were each less than 0.5 mm from the roller surfaces. The bevel angle α of the sealing wedge was 3 °. With a pressure difference of 4 to 10 mbar between the top and bottom of the material web and with a web tension of 8 to 14 kp, stable control of the material web could be achieved without damage being observed.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4003927A DE4003927A1 (en) | 1990-02-09 | 1990-02-09 | Guide for length of material, film or strip |
| DE4003927 | 1990-02-09 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0440971A2 true EP0440971A2 (en) | 1991-08-14 |
| EP0440971A3 EP0440971A3 (en) | 1992-02-19 |
| EP0440971B1 EP0440971B1 (en) | 1994-04-13 |
Family
ID=6399780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90125211A Expired - Lifetime EP0440971B1 (en) | 1990-02-09 | 1990-12-21 | Control for the path of a web |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5176305A (en) |
| EP (1) | EP0440971B1 (en) |
| JP (1) | JP2925763B2 (en) |
| DE (2) | DE4003927A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6525645B2 (en) | 1998-08-26 | 2003-02-25 | Lear Corporation | Integrated remote keyless entry and garage door opener using a universal repeater |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9116251U1 (en) * | 1991-05-28 | 1992-07-16 | Koenig & Bauer Ag, 8700 Wuerzburg, De | |
| DE4236299C2 (en) * | 1992-10-28 | 2003-03-06 | Emtec Magnetics Gmbh | Sealing device at the inlet and / or outlet of a floating dryer for webs |
| DE29504553U1 (en) * | 1995-03-17 | 1995-06-14 | Voith Sulzer Papiermasch Gmbh | Device for stabilizing a web |
| DE102005026516B4 (en) * | 2005-06-08 | 2012-12-06 | Jürgen Wahrmund | Device for aligning a material web |
| US8398063B2 (en) * | 2008-12-10 | 2013-03-19 | Gross International Americas, Inc. | Ribbon transport apparatus and method |
| US9156285B2 (en) * | 2013-09-30 | 2015-10-13 | Eastman Kodak Company | Integrated vacuum assist web transport system |
| CN106429586A (en) * | 2016-11-23 | 2017-02-22 | 佛山智达思佳机电科技有限公司 | Paper flattening mechanism in paper feeding system |
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| FR2410619A1 (en) * | 1977-12-01 | 1979-06-29 | Ibm | DEVICE FOR TRANSPORTING FLEXIBLE SHEETS OF DIFFERENT DIMENSIONS |
| AT356149B (en) * | 1973-06-15 | 1980-04-10 | Koenig & Bauer Ag | DEVICE IN ARC ROTATION PRINTING MACHINES |
| FR2467161A1 (en) * | 1979-10-08 | 1981-04-17 | Gd Spa | BAND GUIDING DEVICE, IN PARTICULAR FOR CIGARETTE MANUFACTURING MACHINES |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4035509Y1 (en) * | 1964-05-18 | 1965-12-14 | ||
| US3371835A (en) * | 1965-10-14 | 1968-03-05 | Honeywell Inc | Web transport with skew control |
| US3412915A (en) * | 1966-09-29 | 1968-11-26 | Ibm | Pneumatic capstan assembly |
| US3549004A (en) * | 1967-12-11 | 1970-12-22 | American Mach & Foundry | Belt flattening device |
| BE759791A (en) * | 1969-12-11 | 1971-06-03 | Agfa Gevaert Nv | INSTALLATION FOR ORDERING DIFFERENT LAYERS |
| DE2330484C3 (en) * | 1973-06-15 | 1980-08-14 | Koenig & Bauer Ag, 8700 Wuerzburg | Device for creating and feeding individual, flaked sheets in sheet-fed rotary thinning machines |
| DE2331367A1 (en) * | 1973-06-20 | 1975-01-23 | Kleinewefers Ind Co Gmbh | SEAL FOR TREATMENT CONTAINERS, IN PARTICULAR FOR TEXTILE TRACKS |
| GB1490345A (en) * | 1974-01-30 | 1977-11-02 | Agfa Gevaert | Web guiding apparatus |
| DE2915804A1 (en) * | 1979-04-19 | 1980-11-06 | Agfa Gevaert Ag | INDIVIDUAL DRIVE FOR ROLLER HOLLOW CLEANER |
| DD234156A3 (en) * | 1979-12-12 | 1986-03-26 | Wolfen Filmfab Veb | DEVICE FOR CONTINUOUS MOVEMENT OF A BENDING MATERIAL RAILWAY |
| US4381212A (en) * | 1980-02-20 | 1983-04-26 | Molins Machine Company, Inc. | Fingerless single facer |
| DE3512316C1 (en) * | 1985-04-04 | 1986-10-23 | Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf | Device for deflecting a moving web |
| US4862799A (en) * | 1987-11-13 | 1989-09-05 | Rockwell International Corporation | Copper coated anodized aluminum ink metering roller |
-
1990
- 1990-02-09 DE DE4003927A patent/DE4003927A1/en not_active Withdrawn
- 1990-12-21 DE DE59005367T patent/DE59005367D1/en not_active Expired - Fee Related
- 1990-12-21 EP EP90125211A patent/EP0440971B1/en not_active Expired - Lifetime
-
1991
- 1991-01-25 US US07/645,830 patent/US5176305A/en not_active Expired - Lifetime
- 1991-02-04 JP JP3033455A patent/JP2925763B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH340408A (en) * | 1955-12-22 | 1959-08-15 | Beloit Iron Works | Paper machine |
| AT356149B (en) * | 1973-06-15 | 1980-04-10 | Koenig & Bauer Ag | DEVICE IN ARC ROTATION PRINTING MACHINES |
| FR2410619A1 (en) * | 1977-12-01 | 1979-06-29 | Ibm | DEVICE FOR TRANSPORTING FLEXIBLE SHEETS OF DIFFERENT DIMENSIONS |
| FR2467161A1 (en) * | 1979-10-08 | 1981-04-17 | Gd Spa | BAND GUIDING DEVICE, IN PARTICULAR FOR CIGARETTE MANUFACTURING MACHINES |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6525645B2 (en) | 1998-08-26 | 2003-02-25 | Lear Corporation | Integrated remote keyless entry and garage door opener using a universal repeater |
Also Published As
| Publication number | Publication date |
|---|---|
| US5176305A (en) | 1993-01-05 |
| DE4003927A1 (en) | 1991-08-14 |
| JP2925763B2 (en) | 1999-07-28 |
| EP0440971A3 (en) | 1992-02-19 |
| JPH04213542A (en) | 1992-08-04 |
| EP0440971B1 (en) | 1994-04-13 |
| DE59005367D1 (en) | 1994-05-19 |
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