EP1174670A1 - Drying chamber for drying a printed web - Google Patents

Drying chamber for drying a printed web Download PDF

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Publication number
EP1174670A1
EP1174670A1 EP01110906A EP01110906A EP1174670A1 EP 1174670 A1 EP1174670 A1 EP 1174670A1 EP 01110906 A EP01110906 A EP 01110906A EP 01110906 A EP01110906 A EP 01110906A EP 1174670 A1 EP1174670 A1 EP 1174670A1
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EP
European Patent Office
Prior art keywords
web
drying chamber
drying
sheets
printed
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Withdrawn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
EP01110906A
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German (de)
French (fr)
Inventor
Dietmar Pötter
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP1174670A1 publication Critical patent/EP1174670A1/en
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a drying chamber for drying a printed web, consisting of a housing with inlet and outlet openings for the web and at least one infrared radiator directed at the web and / or warm air blowing air nozzles blowing on the web, preferably drying chamber for flexographic printing printed webs on the bridge between the flexographic press and the unwinding and reeling devices is arranged.
  • drying printed Sheets in drying chambers have the problem of being good and rapid drying is hindered by the fact that through an inlet slot in the web entering the drying chamber entrains air that adheres to the web forms an insulating layer that prevents good drying.
  • the object of the invention is therefore a drying chamber of the type specified To create a way that eliminates an insulating layer of air covering the web so that they do not hinder and delay drying of the web can.
  • Turbulence generators are arranged above the track.
  • the web to be dried usually runs into the drying chamber with the printed side facing upwards, so that the turbulence generators arranged above the web co-operate with the web a turbulent air flow, which the entrained by the train isolating air layer or boundary layer by swirling and eliminated so that those consisting of blown air nozzles and / or IR radiators Drying facilities the web unhindered by an insulating layer of air can act.
  • Turbulence generators are expediently arranged on both sides of the web.
  • the turbulence generator can be made across the direction of travel of the web and parallel to this arranged inclined or curved sheets.
  • the sloping metal sheets are advantageously at an acute angle the direction of travel of the web so that it envelops the web Peel air layers as it were.
  • the web Sheets are arranged in the shape of a cylindrical shell. These are preferred arranged so that the concave sides of the sheets face each other.
  • the curved sheets preferably have a wing-shaped profile.
  • FIG. 1 shows an eight-color flexographic printing press 1 with eight printing units, whose pressure rollers are attached to a common impression cylinder are.
  • a drying chamber 5 On the bridge 4 there is a drying chamber 5 surrounded by a housing, through which the printed web from the flexographic printing machine 1 to the reel-up running.
  • the housing 6 of the drying chamber 5 has an inlet slot 7 and an outlet slot 8 for the printed web to be dried.
  • In the housing 6 of the drying chamber 5 are preferably curved Web guide rollers 10 stored, over which the printed web 11 to be dried runs.
  • Drying devices are on the printed side above the web 11 to be dried directed in the illustrated embodiment from a convector 12 and infrared radiators 13 exist.
  • the convector 12 can be a Act blow nozzle arrangement that blows warm air onto the printed web 11.
  • bowl-shaped sheets 14, 15 are arranged above and below the web, whose concave sides face each other.
  • the cupped curved Sheets 14, 15 are arranged at a distance from the web 11 in such a way that their concave sides face each other, so that gap-shaped inlet and outlet slots are formed.
  • the bowl-shaped sheets 14, 15 are arranged in mirror image to the pass plane of the web 11, so that due the air currents from the sheets exerting suction on each other cancel.
  • FIG. 3 shows alternative configurations of the turbulence generators which can be used alone or in combination.
  • Adjacent at the inlet and outlet areas are bowl-shaped sheets or bodies 18, 19 are provided, which are curved, the concave sides facing each other are.
  • the sheets or bodies 18, 19 are mirror images of the flow plane of the arranged to dry web 11.
  • Sheets 20, 21 In the middle area of the drying chamber are sloping or slightly curved Sheets 20, 21 arranged, their cutting edges leading in opposite directions the direction of travel of the web 11 are employed on both sides against this, so that they peel off the layers of air enveloping the web.
  • the sheets 20, 21 are arranged in mirror image to the pass plane of the web 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The drying chamber (5) to dry a printed web (11) consists of a casing (6) with inlet (7) and outlet (8) apertures for the web, and at least one infrared radiator (13) and/or warm air jets (12). A turbulence creator (14, 15) is fitted in the drying chamber above, or above and below, the web to remove the insulting air layers carried along by the web.

Description

Die Erfindung betrifft eine Trockenkammer zum Trocknen einer bedruckten Bahn, bestehend aus einem Gehäuse mit Ein- und Auslauföffnungen für die Bahn und mindestens einem auf die Bahn gerichteten Infrarotstrahler und/oder warme Luft auf die Bahn blasenden Blasluftdüsen, vorzugsweise Trockenkammer für im Flexodruck bedruckte Bahnen, die auf der Brücke zwischen der Flexodruckmaschine und den Ab- und Aufrolleinrichtungen angeordnet ist.The invention relates to a drying chamber for drying a printed web, consisting of a housing with inlet and outlet openings for the web and at least one infrared radiator directed at the web and / or warm air blowing air nozzles blowing on the web, preferably drying chamber for flexographic printing printed webs on the bridge between the flexographic press and the unwinding and reeling devices is arranged.

Zum Trocknen der bedruckten Bahnen durchlaufen diese eine Trockenkammer. In der Trockenkammer erfolgt die Trocknung durch IR-Strahler und/oder Blasluftdüsen, die erwärmte Luft auf die Bahn blasen. Bei der Trocknung von bedruckten Bahnen in Trockenkammern ergibt sich jedoch das Problem, daß eine gute und schnelle Trocknung dadurch behindert wird, daß die durch einen Einlaufschlitz in die Trockenkammer einlaufende Bahn Luft mitschleppt, die eine an der Bahn anhaftende isolierende Schicht bildet, die eine gute Trocknung behindert.To dry the printed webs, they pass through a drying chamber. In the drying chamber is dried by IR emitters and / or blown air nozzles, blow the warmed air onto the web. When drying printed Sheets in drying chambers, however, have the problem of being good and rapid drying is hindered by the fact that through an inlet slot in the web entering the drying chamber entrains air that adheres to the web forms an insulating layer that prevents good drying.

Aufgabe der Erfindung ist es daher, eine Trockenkammer der eingangs angegebenen Art zu schaffen, bei der eine die Bahn abdeckende isolierende Luftschicht beseitigt wird, so daß diese eine Trocknung der Bahn nicht behindern und verzögern kann.The object of the invention is therefore a drying chamber of the type specified To create a way that eliminates an insulating layer of air covering the web so that they do not hinder and delay drying of the web can.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß in der Trockenkammer oberhalb der Bahn Turbulenzerzeuger angeordnet sind. Die zu trocknende Bahn läuft üblicherweise mit nach oben weisender bedruckter Seite in die Trockenkammer, so daß die oberhalb der Bahn angeordneten Turbulenzerzeuger die Bahn mit einer turbulenten Luftströmung beaufschlagen, die die von der Bahn mitgeschleppte isolierende Luftschicht oder Grenzschicht durch Verwirbelung auflöst und beseitigt, so daß die aus Blasluftdüsen und/oder IR-Strahlern bestehenden Trocknungseinrichtungen die Bahn unbehindert durch eine isolierende Luftschicht beaufschlagen können.According to the invention, this object is achieved in that in the drying chamber Turbulence generators are arranged above the track. The web to be dried usually runs into the drying chamber with the printed side facing upwards, so that the turbulence generators arranged above the web co-operate with the web a turbulent air flow, which the entrained by the train isolating air layer or boundary layer by swirling and eliminated so that those consisting of blown air nozzles and / or IR radiators Drying facilities the web unhindered by an insulating layer of air can act.

Zweckmäßigerweise sind beidseits der Bahn Turbulenzerzeuger angeordnet.Turbulence generators are expediently arranged on both sides of the web.

Die Turbulenzerzeuger können aus quer zu der Laufrichtung der Bahn und parallel zu dieser angeordneten schrägstehenden oder gekrümmten Blechen bestehen. Dabei sind die schrägstehenden Bleche zweckmäßigerweise spitzwinkelig entgegen der Laufrichtung der Bahn an diese angestellt, so daß diese die Bahn einhüllende Luftschichten gleichsam abschälen.The turbulence generator can be made across the direction of travel of the web and parallel to this arranged inclined or curved sheets. In this case, the sloping metal sheets are advantageously at an acute angle the direction of travel of the web so that it envelops the web Peel air layers as it were.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß beidseits der Bahn zylinderschalenförmig gekrümmte Bleche angeordnet sind. Diese sind vorzugsweise so angeordnet, daß die konkaven Seiten der Bleche einander zugewandt sind.According to a preferred embodiment it is provided that on both sides of the web Sheets are arranged in the shape of a cylindrical shell. These are preferred arranged so that the concave sides of the sheets face each other.

Diese beidseitige Anordnung der zylinderschalenförmig gekrümmten Bleche ist besonders vorteilhaft, obwohl die Bahn üblicherweise über diese führende Leitrollen läuft, um zu verhindern, daß nur einseitig angeordnete Bleche aufgrund des konkaven Profils die Bahn ansaugen und anheben. Sind die gekrümmten und vorzugsweise konkav gekrümmten Bleche beidseits der Bahn spiegelbildlich zu dieser angeordnet, heben sich von den Blechen auf die Bahn ausgeübte Saug- oder Druckkräfte auf. This arrangement of the sheets curved in the shape of a cylindrical shell on both sides is special advantageous, although the web usually has these leading idlers runs to prevent sheets that are only arranged on one side due to the concave Suck and lift the web. Are the curved and preferred concavely curved sheets arranged on both sides of the path in mirror image to this, suction or pressure forces exerted by the sheets on the web rise on.

Vorzugsweise besitzen die gekrümmten Bleche ein tragflügelförmiges Profil.The curved sheets preferably have a wing-shaped profile.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

Fig. 1
eine Acht-Farben-Flexodruckmaschine mit Ab- und Aufwickeleinrichtungen für die bedruckten Bahnen und eine beide verbindende Brücke mit auf dieser angeordneten Trockenkammer in schematischer Seitenansicht,
Fig. 2
eine schematische Seitenansicht einer ersten Ausführungsform der Trockenkammer mit abgehobener Vorderwand in schematischer Darstellung und
Fig. 3
eine der Fig. 2 entsprechende zweite Ausführungsform der Trockenkammer.
Embodiments of the invention are explained below with reference to the drawing. In this shows
Fig. 1
an eight-color flexographic printing machine with unwinding and winding devices for the printed webs and a bridge connecting both with a drying chamber arranged on it in a schematic side view,
Fig. 2
is a schematic side view of a first embodiment of the drying chamber with lifted front wall in a schematic representation and
Fig. 3
one of FIG. 2 corresponding second embodiment of the drying chamber.

Aus Fig. 1 ist eine Acht-Farben-Flexodruckmaschine 1 mit acht Druckwerken ersichtlich, deren Druckwalzen an einen gemeinsamen Gegendruckzylinder angestellt sind. Zum Abrollen der zu bedruckenden Bahn von einer Vorratsrolle 3 und zum Aufwickeln der bedruckten Bahn auf eine Rolle 2 sind übliche Ab- und Aufrolleinrichtungen vorgesehen, wobei die zu bedruckende Bahn und die bedruckte Bahn über eine Brücke 4 geführt sind, die die Ab- und Aufrolleinrichtungen mit der Flexodruckmaschine 1 verbinden.1 shows an eight-color flexographic printing press 1 with eight printing units, whose pressure rollers are attached to a common impression cylinder are. For unrolling the web to be printed from a supply roll 3 and Winding the printed web on a roll 2 are conventional unwinding and reeling devices provided, the web to be printed and the printed web are guided over a bridge 4 which the unwinding and reeling devices with the flexographic printing machine 1 connect.

Auf der Brücke 4 ist eine von einem Gehäuse eingefaßte Trockenkammer 5 angeordnet, durch die die bedruckte Bahn von der Flexodruckmaschine 1 zu der Aufrolleinrichtung läuft. Das Gehäuse 6 der Trockenkammer 5 ist mit einem Einlaufschlitz 7 und einem Auslaufschlitz 8 für die bedruckte zu trocknende Bahn versehen. In dem Gehäuse 6 der Trockenkammer 5 sind vorzugsweise auf einer gekrümmten Bahn Leitrollen 10 gelagert, über die die zu trocknende bedruckte Bahn 11 läuft. On the bridge 4 there is a drying chamber 5 surrounded by a housing, through which the printed web from the flexographic printing machine 1 to the reel-up running. The housing 6 of the drying chamber 5 has an inlet slot 7 and an outlet slot 8 for the printed web to be dried. In the housing 6 of the drying chamber 5 are preferably curved Web guide rollers 10 stored, over which the printed web 11 to be dried runs.

Oberhalb der zu trocknenden Bahn 11 sind auf die bedruckte Seite Trocknungseinrichtungen gerichtet, die im dargestellten Ausführungsbeispiel aus einem Konvektor 12 und Infrarotstrahlern 13 bestehen. Bei dem Konvektor 12 kann es sich um eine Blasdüsenanordnung handeln, die warme Luft auf die bedruckte Bahn 11 bläst.Drying devices are on the printed side above the web 11 to be dried directed in the illustrated embodiment from a convector 12 and infrared radiators 13 exist. The convector 12 can be a Act blow nozzle arrangement that blows warm air onto the printed web 11.

Zwischen den Leitrollen 10 und beidseits des Konvektors 12 und des Infrarotstrahlers 13 sind oberhalb und unterhalb der Bahn schalenförmige Bleche 14, 15 angeordnet, deren konkave Seiten einander zugewandt sind. Die schalenförmig gekrümmten Bleche 14, 15 sind im Abstand zu der Bahn 11 in der Weise angeordnet, daß deren konkaven Seiten einander zugewandt sind, so daß spaltförmige Einlauf- und Auslaufschlitze gebildet sind. Aufgrund der Form der Bleche 14, 15 erzeugen diese eine beide Seiten der Bahn beaufschlagende turbulente Strömung, die mitgeschleppte isolierende Luftschichten auflöst. Die schalenförmigen Bleche 14, 15 sind spiegelbildlich zu der Durchlaufebene der Bahn 11 angeordnet, so daß aufgrund der Luftströmungen von den Blechen auf die Bahn ausgeübte Saugwirkungen einander aufheben.Between the guide rollers 10 and on both sides of the convector 12 and the infrared radiator 13, bowl-shaped sheets 14, 15 are arranged above and below the web, whose concave sides face each other. The cupped curved Sheets 14, 15 are arranged at a distance from the web 11 in such a way that their concave sides face each other, so that gap-shaped inlet and outlet slots are formed. Generate due to the shape of the sheets 14, 15 this turbulent flow acting on both sides of the web, the dragged along insulating air layers dissolves. The bowl-shaped sheets 14, 15 are arranged in mirror image to the pass plane of the web 11, so that due the air currents from the sheets exerting suction on each other cancel.

Die Durchlaufrichtung der Bahn 11 durch die Trockenkammer 5 ist durch Pfeile A angedeutet.The direction of travel of the web 11 through the drying chamber 5 is indicated by arrows A. indicated.

Aus Fig. 3 sind alternative Ausgestaltungen der Turbulenzerzeuger ersichtlich, die für sich allein oder in Kombination miteinander eingesetzt werden können. Angrenzend an die Ein- und Auslaufbereiche sind schalenförmige Bleche oder Körper 18, 19 vorgesehen, die gekrümmt sind, wobei die konkaven Seiten einander zugewandt sind. Die Bleche oder Körper 18, 19 sind spiegelbildlich zu der Durchlaufebene der zu trocknenden Bahn 11 angeordnet.3 shows alternative configurations of the turbulence generators which can be used alone or in combination. Adjacent at the inlet and outlet areas are bowl-shaped sheets or bodies 18, 19 are provided, which are curved, the concave sides facing each other are. The sheets or bodies 18, 19 are mirror images of the flow plane of the arranged to dry web 11.

Im mittleren Bereich der Trockenkammer sind schrägstehende oder leicht gekrümmte Bleche 20, 21 angeordnet, deren schneidenkantigen Einlaufkanten entgegen der Laufrichtung der Bahn 11 beidseits gegen diese angestellt sind, so daß sie die Bahn einhüllende Luftschichten gleichsam abschälen. Auch die Bleche 20, 21 sind spiegelbildlich zur Durchlaufebene der Bahn 11 angeordnet.In the middle area of the drying chamber are sloping or slightly curved Sheets 20, 21 arranged, their cutting edges leading in opposite directions the direction of travel of the web 11 are employed on both sides against this, so that they peel off the layers of air enveloping the web. The sheets 20, 21 are arranged in mirror image to the pass plane of the web 11.

Claims (6)

Trockenkammer (5) zum Trocknen einer bedruckten Bahn (11), bestehend aus einem Gehäuse (6) mit Ein- und Auslauföffnungen (7, 8) für die Bahn (11) und mit mindestens einem auf die Bahn (11) gerichteten Infrarotstrahler (13) und/oder warme Luft auf die Bahn blasenden Blasluftdüsen (12), vorzugsweise Trockenkammer für im Flexodruck bedruckte Bahnen, die auf der Brücke (4) zwischen der Flexodruckmaschine (1) und den Ab- und Aufrolleinrichtungen für die Bahn angeordnet ist,
dadurch gekennzeichnet, daß in der Trockenkammer (5) oberhalb der Bahn (11) Turbulenzerzeuger (14, 18, 20) angeordnet sind. Drying chamber (5) for drying a printed web (11), comprising a housing (6) with inlet and outlet openings (7, 8) for the web (11) and with at least one infrared radiator (13) directed towards the web (11) ) and / or warm air blowing on the web blowing air nozzles (12), preferably drying chamber for webs printed in flexographic printing, which is arranged on the bridge (4) between the flexographic printing machine (1) and the unwinding and reeling devices for the web,
characterized in that turbulence generators (14, 18, 20) are arranged in the drying chamber (5) above the web (11). Trockenkammer nach Anspruch 1, dadurch gekennzeichnet, daß beidseits der Bahn Turbulenzerzeuger (14, 18, 20) angeordnet sind.Drying chamber according to claim 1, characterized in that turbulence generators (14, 18, 20) are arranged on both sides of the web. Trockenkammer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Turbulenzerzeuger aus quer zu der Laufrichtung der Bahn (11) und parallel zu dieser angeordneten schrägstehenden oder gekrümmten Blechen (14, 18, 20) bestehen.Drying chamber according to claim 1 or 2, characterized in that the turbulence generators consist of sloping or curved sheets (14, 18, 20) arranged transversely to the running direction of the web (11) and parallel thereto. Trockenkammer nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß beidseits der Bahn zylinderschalenförmig gekrümmte Bleche (14, 15; 18, 19) angeordnet sind.Drying chamber according to claim 2 or 3, characterized in that sheets (14, 15; 18, 19) are arranged on both sides of the web in the shape of a cylinder shell. Trockenkammer nach Anspruch 4, dadurch gekennzeichnet, daß die konkaven Seiten der Bleche einander zugewandt sind.Drying chamber according to claim 4, characterized in that the concave sides of the sheets face each other. Trockenkammer nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die gekrümmten Bleche (18, 19) ein tragflügelförmiges Profil besitzen.Drying chamber according to claim 4 or 5, characterized in that the curved sheets (18, 19) have a wing-shaped profile.
EP01110906A 2000-07-17 2001-05-05 Drying chamber for drying a printed web Withdrawn EP1174670A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10034708A DE10034708A1 (en) 2000-07-17 2000-07-17 Drying chamber for drying a printed web
DE10034708 2000-07-17

Publications (1)

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EP1174670A1 true EP1174670A1 (en) 2002-01-23

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ID=7649199

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EP01110906A Withdrawn EP1174670A1 (en) 2000-07-17 2001-05-05 Drying chamber for drying a printed web

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US (1) US6505419B2 (en)
EP (1) EP1174670A1 (en)
DE (1) DE10034708A1 (en)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
DE10246271A1 (en) 2002-10-02 2004-04-15 Windmöller & Hölscher Kg Ink density setting device for rotary printing press has thinning-out device for solvent solution
DE10257320B4 (en) * 2002-12-06 2006-02-16 Coatema Maschinenbau Gmbh Channel system for the thermal treatment of coated webs
US8322047B2 (en) * 2007-06-29 2012-12-04 Moore Wallace North America, Inc. System and method for drying a freshly printed medium
DE102008025994B4 (en) 2008-05-29 2011-06-09 Windmöller & Hölscher Kg press
US8967786B2 (en) 2012-05-30 2015-03-03 Antonio Monclus Velasco Printing apparatus and methods

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US2306019A (en) * 1939-10-21 1942-12-22 B F Sturtevant Co Drying apparatus
US2308767A (en) * 1939-05-18 1943-01-19 Mark W Mayes Apparatus for dehydrating yarn
US2473629A (en) * 1944-11-16 1949-06-21 Bernard R Andrews Drying apparatus
US2804694A (en) * 1953-12-04 1957-09-03 Canada Wire & Cable Co Ltd Ovens and heat treating apparatus
US3584846A (en) * 1969-11-14 1971-06-15 Lyle E Mccoy Heating apparatus for elongate material
DE2417096A1 (en) * 1974-04-08 1975-10-16 Erich Ing Grad Hilgeroth Web drier for drying continuously moving web - with upper and lower staggered array of nozzles extending transversely of the web and provided with concave faces
US4201323A (en) * 1978-10-12 1980-05-06 W. R. Grace & Co. High velocity web floating air bar having a recessed Coanda plate
US4843731A (en) * 1986-03-06 1989-07-04 Hilmar Vits Device for floatably guiding webs of material by means of a gaseous or liquid medium
WO1997037182A1 (en) * 1996-03-29 1997-10-09 Minnesota Mining And Manufacturing Company Apparatus and method for drying a coating on a substrate employing multiple drying subzones

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Publication number Priority date Publication date Assignee Title
US2308767A (en) * 1939-05-18 1943-01-19 Mark W Mayes Apparatus for dehydrating yarn
US2306019A (en) * 1939-10-21 1942-12-22 B F Sturtevant Co Drying apparatus
US2473629A (en) * 1944-11-16 1949-06-21 Bernard R Andrews Drying apparatus
US2804694A (en) * 1953-12-04 1957-09-03 Canada Wire & Cable Co Ltd Ovens and heat treating apparatus
US3584846A (en) * 1969-11-14 1971-06-15 Lyle E Mccoy Heating apparatus for elongate material
DE2417096A1 (en) * 1974-04-08 1975-10-16 Erich Ing Grad Hilgeroth Web drier for drying continuously moving web - with upper and lower staggered array of nozzles extending transversely of the web and provided with concave faces
US4201323A (en) * 1978-10-12 1980-05-06 W. R. Grace & Co. High velocity web floating air bar having a recessed Coanda plate
US4843731A (en) * 1986-03-06 1989-07-04 Hilmar Vits Device for floatably guiding webs of material by means of a gaseous or liquid medium
WO1997037182A1 (en) * 1996-03-29 1997-10-09 Minnesota Mining And Manufacturing Company Apparatus and method for drying a coating on a substrate employing multiple drying subzones

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Publication number Publication date
US6505419B2 (en) 2003-01-14
US20020040536A1 (en) 2002-04-11
DE10034708A1 (en) 2002-01-31

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