EP0440971B1 - Vorrichtung zur Bahnlaufsteuerung - Google Patents

Vorrichtung zur Bahnlaufsteuerung Download PDF

Info

Publication number
EP0440971B1
EP0440971B1 EP90125211A EP90125211A EP0440971B1 EP 0440971 B1 EP0440971 B1 EP 0440971B1 EP 90125211 A EP90125211 A EP 90125211A EP 90125211 A EP90125211 A EP 90125211A EP 0440971 B1 EP0440971 B1 EP 0440971B1
Authority
EP
European Patent Office
Prior art keywords
web
rollers
rolls
sealing
wedge
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
Application number
EP90125211A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0440971A3 (en
EP0440971A2 (de
Inventor
Johann Dipl.-Ing. Baarfüsser
Lothar Dipl.-Ing. Langer
Frank Dipl.-Ing. Mannaberg
Reinhold Nentwich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emtec Magnetics GmbH
Original Assignee
BASF Magnetics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF Magnetics GmbH filed Critical BASF Magnetics GmbH
Publication of EP0440971A2 publication Critical patent/EP0440971A2/de
Publication of EP0440971A3 publication Critical patent/EP0440971A3/de
Application granted granted Critical
Publication of EP0440971B1 publication Critical patent/EP0440971B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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, wherein the web rests on at least two rollers and in the area of the rollers there is a pressure difference between the top and bottom of the web.
  • Hollow suction cups are preferably used in drying sections in which the layer or layers freshly applied to a substrate 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.
  • 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 roller 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 suction cups, 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 damage such as scratching or folding is carried out precisely.
  • 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 supported 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 a drying temperature of 140 ° C, 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 FIG. 2a, 2b, or 3, protruded into the interior on both sides, with a radial distance of about 0.5 mm to the running surface of the 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)
EP90125211A 1990-02-09 1990-12-21 Vorrichtung zur Bahnlaufsteuerung Expired - Lifetime EP0440971B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003927 1990-02-09
DE4003927A DE4003927A1 (de) 1990-02-09 1990-02-09 Vorrichtung zur bahnlaufsteuerung

Publications (3)

Publication Number Publication Date
EP0440971A2 EP0440971A2 (de) 1991-08-14
EP0440971A3 EP0440971A3 (en) 1992-02-19
EP0440971B1 true EP0440971B1 (de) 1994-04-13

Family

ID=6399780

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125211A Expired - Lifetime EP0440971B1 (de) 1990-02-09 1990-12-21 Vorrichtung zur Bahnlaufsteuerung

Country Status (4)

Country Link
US (1) US5176305A (ja)
EP (1) EP0440971B1 (ja)
JP (1) JP2925763B2 (ja)
DE (2) DE4003927A1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9116251U1 (de) * 1991-05-28 1992-07-16 Koenig & Bauer AG, 8700 Würzburg Walze zum Führen einer Warenbahn
DE4236299C2 (de) * 1992-10-28 2003-03-06 Emtec Magnetics Gmbh Abdichtvorrichtung am Einlauf und/oder Auslauf eines Schwebetrockners für Warenbahnen
DE29504553U1 (de) * 1995-03-17 1995-06-14 Voith Sulzer Papiermaschinen GmbH, 89522 Heidenheim Vorrichtung zum Stabilisieren einer Warenbahn
US6525645B2 (en) 1998-08-26 2003-02-25 Lear Corporation Integrated remote keyless entry and garage door opener using a universal repeater
DE102005026516B4 (de) * 2005-06-08 2012-12-06 Jürgen Wahrmund Einrichtung zum Ausrichten einer Materialbahn
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 (zh) * 2016-11-23 2017-02-22 佛山智达思佳机电科技有限公司 一种输纸系统中的平纸机构
KR20230095860A (ko) * 2021-12-22 2023-06-29 주식회사 엘지에너지솔루션 전극 시트의 건조장치 및 건조방법

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH340408A (de) * 1955-12-22 1959-08-15 Beloit Iron Works Papiermaschine
JPS4035509Y1 (ja) * 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 (nl) * 1969-12-11 1971-06-03 Agfa Gevaert Nv Installatie voor het opdragen van verschillende lagen
DE2330484C3 (de) * 1973-06-15 1980-08-14 Koenig & Bauer Ag, 8700 Wuerzburg Vorrichtung zum Anlegen und Zuführen von vereinzelten, geschuppt zugeführten Bogen in Bogenrotationsdnickm aschinen
AT356149B (de) * 1973-06-15 1980-04-10 Koenig & Bauer Ag Vorrichtung in bogenrotationsdruckmaschinen
DE2331367A1 (de) * 1973-06-20 1975-01-23 Kleinewefers Ind Co Gmbh Dichtung fuer behandlungsbehaelter, insbesondere fuer textile warenbahnen
GB1490345A (en) * 1974-01-30 1977-11-02 Agfa Gevaert Web guiding apparatus
US4202542A (en) * 1977-12-01 1980-05-13 International Business Machines Corporation Apparatus for handling flexible sheet material of different sizes
DE2915804A1 (de) * 1979-04-19 1980-11-06 Agfa Gevaert Ag Einzelantrieb fuer walzenhohlsauger
IT1119879B (it) * 1979-10-08 1986-03-10 Gd Spa Dispositivo guidanastro particolarmente per macchine confezionatrici di sigarette
DD234156A3 (de) * 1979-12-12 1986-03-26 Wolfen Filmfab Veb Vorrichtung zum fortlaufenden bewegen einer biegsamen materialbahn
US4381212A (en) * 1980-02-20 1983-04-26 Molins Machine Company, Inc. Fingerless single facer
DE3512316C1 (de) * 1985-04-04 1986-10-23 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Vorrichtung zum Umlenken einer sich bewegenden Bahn
US4862799A (en) * 1987-11-13 1989-09-05 Rockwell International Corporation Copper coated anodized aluminum ink metering roller

Also Published As

Publication number Publication date
JP2925763B2 (ja) 1999-07-28
EP0440971A3 (en) 1992-02-19
DE59005367D1 (de) 1994-05-19
EP0440971A2 (de) 1991-08-14
JPH04213542A (ja) 1992-08-04
US5176305A (en) 1993-01-05
DE4003927A1 (de) 1991-08-14

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