EP0378860A2 - Dispositif pour courber sans contact un matériau en bande se déplaçant en continu - Google Patents

Dispositif pour courber sans contact un matériau en bande se déplaçant en continu Download PDF

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Publication number
EP0378860A2
EP0378860A2 EP89124147A EP89124147A EP0378860A2 EP 0378860 A2 EP0378860 A2 EP 0378860A2 EP 89124147 A EP89124147 A EP 89124147A EP 89124147 A EP89124147 A EP 89124147A EP 0378860 A2 EP0378860 A2 EP 0378860A2
Authority
EP
European Patent Office
Prior art keywords
openings
compressed air
strip material
bending
arch wall
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.)
Withdrawn
Application number
EP89124147A
Other languages
German (de)
English (en)
Other versions
EP0378860A3 (fr
Inventor
Václav Jiricek
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.)
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
Original Assignee
Elitex Zavody Textilniho
Elitex Koncern Textilniho Strojirenstvi
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 Elitex Zavody Textilniho, Elitex Koncern Textilniho Strojirenstvi filed Critical Elitex Zavody Textilniho
Publication of EP0378860A2 publication Critical patent/EP0378860A2/fr
Publication of EP0378860A3 publication Critical patent/EP0378860A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
    • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar

Definitions

  • the invention relates to a device for contactless bending of a continuous strip material, in particular a textile web.
  • a modern printing line consisting of a planographic printing press and a drying compartment is often several ten meters long, of which about one half of the total length of the system is for the planographic printing machine and one for the drying compartment.
  • Printing lines with these length dimensions can only be accommodated in existing production halls with considerable difficulties and conversions. A reduction in the length of known printing lines has not yet been possible.
  • Non-contact bending of a dense strip material can e.g. can be achieved by using a known hollow cylinder with perforation in the required arc section and by compressed air flowing out of the perforation openings. An overpressure gap is formed between the belt and the cylinder, which prevents contact.
  • This method can work satisfactorily for thick tapes and foils of greater thickness and rigidity.
  • the stiffness and density of a textile tape is so low that this process cannot avoid local contact.
  • the object of the invention is to eliminate the disadvantages of known devices for contactless bending of a continuous strip material, in particular a textile strip, in order, inter alia, to to be able to significantly reduce the length of planographic printing lines.
  • rows of compressed air openings are provided at least on the inlet and outlet part of a curved surface along their width, the openings of which are oriented in the direction of the continuous strip material.
  • the advantages of the invention consist primarily in the fact that even light and porous tapes made of textile materials can be bent from the top without undesirable contacts with the curved surface at the outlet of the printing unit. In planographic printing machines with a drying part known from CS-A-240 160, this can be arranged above the printing unit, which significantly shortens the overall length of the entire printing line.
  • the device according to the invention is structurally simple and its function can be controlled in a simple manner by metering the amount of compressed air and, if necessary, adjusting the outflow openings.
  • planographic printing line for textile webs shown in Fig. 1 contains a planographic printing machine a, which is followed by a drying chamber b in the same plane.
  • a drying chamber b equipped with a supporting nozzle system is arranged above the planographic printing machine a, which is made possible by a bending device c for the continuous belt.
  • the wall 2 has the shape of a circular arc with the radius R and an arc length of more than 180 °. It forms with here right-angled side walls 1 ', 1 ⁇ the hollow body 1, which is mounted on the inlet side of the drying chamber b.
  • the arch wall 2 can also have a differently curved shape, for example with an approximately vertical and horizontal end part, but the shapes shown are preferred for fluidic and structural reasons.
  • the two end sections 8, 8 'of the arch wall 2 limit together with angled end sections 8, 8' of the side walls 1 ', 1 ⁇ two rows of outflow channels 4, 4' extending over the entire length, the longitudinal axes 7, 7 'of which are approximately parallel to one another and extend tangentially to the end sections 8, 8 '.
  • the openings 9 of the lower outflow channels 4 are oriented obliquely in the running direction on the continuous belt 5.
  • the openings 9 'of the upper outflow channels 4' are aligned obliquely against the running direction of the textile belt 5. Compressed air is introduced into the hollow body 1 via connections not shown.
  • a further row of outflow openings 6 is provided in the central arc region. If necessary, the further openings can be arranged in a suitable offset distribution in the arch wall 2.
  • the device according to the invention works so that compressed air 7 flows out of the row-shaped openings 9, 9 'in the directions indicated by the pillars 7 and 7' and follows the curvature of the arch wall 2 in accordance with the laws of the wall flow.
  • a greater air pressure develops than in the area of the outflow openings 9, 9 '.
  • the air streams flowing out of the upper channels 4 'against the running direction of the band 5 preferably have a lifting function for the horizontal starting section 5 ′′′ of the curved band 5 and generate an additional pressure cushion in the widening area on the underside of the band section 5,, which makes contact of the band section 5 mitigate prevented with the upper end of the arch wall 2 and counteracts the decrease in pressure caused by the accelerated outflow of air from the middle pressure cushion in the band area 5 '.
  • the invention is not limited to the embodiments shown. So the openings 9, 9 'and the channels 4, 4' can also be formed in the form of continuous slots. Furthermore, the outflow cross-section of individual or all openings e.g. can be made adjustable by panels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
EP19890124147 1989-01-17 1989-12-29 Dispositif pour courber sans contact un matériau en bande se déplaçant en continu Withdrawn EP0378860A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS31489A CS273860B1 (en) 1989-01-17 1989-01-17 Device for contactless bending passing band material
CS314/89 1989-01-17

Publications (2)

Publication Number Publication Date
EP0378860A2 true EP0378860A2 (fr) 1990-07-25
EP0378860A3 EP0378860A3 (fr) 1991-03-27

Family

ID=5335045

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890124147 Withdrawn EP0378860A3 (fr) 1989-01-17 1989-12-29 Dispositif pour courber sans contact un matériau en bande se déplaçant en continu

Country Status (2)

Country Link
EP (1) EP0378860A3 (fr)
CS (1) CS273860B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493679A3 (en) * 1990-12-03 1992-12-16 Hughes Aircraft Company Filament air bearing
WO1999057499A1 (fr) * 1998-05-06 1999-11-11 Imation Corp. Commande de la hauteur de flottaison d'un substrat se deplaçant au-dessus d'une plaque courbe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES274570A1 (es) * 1961-02-18 1962-10-16 Svenska Flaektfabriken Ab Dispositivo de giro para un material en forma de lamina para el secado y otros tratamientos del papel, celulosa y materiales analogos
DE1272267B (de) * 1963-03-30 1968-07-11 Elitex Zavody Textilniho Duese fuer einen Duesentrockner zum Trocknen von insbesondere Textilien
EP0003414B1 (fr) * 1978-01-27 1981-11-04 Spooner Edmeston Engineering Limited Appareil de traitement à l'état flottant

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493679A3 (en) * 1990-12-03 1992-12-16 Hughes Aircraft Company Filament air bearing
AU645375B2 (en) * 1990-12-03 1994-01-13 Hughes Aircraft Company Filament air bearing
WO1999057499A1 (fr) * 1998-05-06 1999-11-11 Imation Corp. Commande de la hauteur de flottaison d'un substrat se deplaçant au-dessus d'une plaque courbe
US6256904B1 (en) 1998-05-06 2001-07-10 Imation Corp. Controlling float height of moving substrate over curved plate
US6511708B1 (en) 1998-05-06 2003-01-28 Imation Corp. Controlling float height of moving substrate over curved plate

Also Published As

Publication number Publication date
CS273860B1 (en) 1991-04-11
EP0378860A3 (fr) 1991-03-27
CS31489A1 (en) 1990-08-14

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