US3873013A - High velocity web floating air bar having center exhaust means - Google Patents

High velocity web floating air bar having center exhaust means Download PDF

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Publication number
US3873013A
US3873013A US403510A US40351073A US3873013A US 3873013 A US3873013 A US 3873013A US 403510 A US403510 A US 403510A US 40351073 A US40351073 A US 40351073A US 3873013 A US3873013 A US 3873013A
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US
United States
Prior art keywords
air
bar
plate
exhaust chamber
web
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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US403510A
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English (en)
Inventor
Paul H Stibbe
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.)
WR Grace and Co Conn
Tec Systems Inc
Original Assignee
Tec Systems Inc
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 Tec Systems Inc filed Critical Tec Systems Inc
Priority to US403510A priority Critical patent/US3873013A/en
Priority to CA210,010A priority patent/CA998709A/en
Priority to GB4217574A priority patent/GB1443679A/en
Priority to DE2447119A priority patent/DE2447119C2/de
Priority to FR7433204A priority patent/FR2246479B1/fr
Priority to IT53354/74A priority patent/IT1021694B/it
Priority to JP49114285A priority patent/JPS5844945B2/ja
Application granted granted Critical
Publication of US3873013A publication Critical patent/US3873013A/en
Priority to ES450241A priority patent/ES450241A1/es
Assigned to W. R. GRACE & CO.-CONN. reassignment W. R. GRACE & CO.-CONN. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: GRACE MERGER CORP. A CT CORP. (MERGED INTO), W. R. GRACE & CO. A CT. CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/0403—Drying webs
    • B41F23/0423—Drying webs by convection
    • B41F23/0426—Drying webs by convection using heated air
    • 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
    • B65H2406/112—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along preferably rectilinear path, e.g. nozzle bed for web

Definitions

  • ABSTRACT An air bar for floating web material and which in- (B I iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii IIIIIIIII 4 551982 Cludes two slot nozzles, one along each of its longitu- [58] R 57 A dinal edges and which nozzles direct air streams tom 0 care 3 ward the web and partially toward one another.
  • the air barprovided by the present invention also includes exhaust passages along the center of the air bar and which remove a percentage of the twostreams of air which are directed by the slot nozzles toward the web and then toward one another where they meet at the center of the air bar.
  • a separate exhaust chamber is in communication with the exhaust passages and islocated within the air bar for receiving the air discharged by the nozzles, removing it from the area of the web and into the exhaust chamber and then discharging the removed air out the ends of the air bars.
  • the chamber is economically formed from two nested fabricated pieces of steel and are accurately located within the air bar by supports which in no way impede the flow of air being discharged through the slot nozzles.
  • FIG. I is a perspective view of a high velocity web drying with which the present invention is used, certain parts being shown in phantom line for clarity in the drawing;
  • FIG. 2 is a transverse sectional view through the dryer shown in FIG. 1, certain parts being shown as broken away, in section, or removed for the sake of clarity;
  • FIG. 3 is a perspective view of a portion of the lower air bar assembly shown in FIGS. 1 and 2, certain air bars being removed for the sake of clarity and certain other parts being shown as broken away or removed;
  • FIG. 4 is an elevational end view, on an enlarged scale of one of the air bars shown in the other figures;
  • FIG. 5 is a view similar to FIG. 4, but being in section;
  • FIG. 6 is a view similar to FIG. 5, but showing a modified form of air bar;
  • FIG. 6a is another modification of the air bar
  • FIG. 7 is a longitudinal cross sectional view taken generally along the line 7-7 in FIG. 6, but on a re Jerusalem scale;
  • FIG. 8 is a fragmentary, enlarged view of a portion of the air bar shown in FIG. 5;
  • FIG. 9 is a graph showing percent of initial pressure plotted against the various locations across the air bar shown in FIG. 8;
  • FIG. 10 is a graph showing the percent of initial nozzle pressure plotted against the ratio of the area of the center exhaust openings in the bar to the area of both of the supply slot nozzles.
  • the housing also includes a bottom 5 and a top 6 which thereby form an enclosure.
  • the inlet side of the housing has a web inlet 11 through which the web also passes into the housing, and a web outlet 12 located at the opposite outlet side of the housing 4 for permitting the web to pass directly through the housing.
  • An exhaust duct 14 extends from the rear side 2 of the housing and is in air receiving communication with the interior of the housing and serves to exhaust a certain amount of air continually from the housing.
  • An upper air bar and supply duct assembly UA is mounted within the housing and includes a pair of Iongitudinally disposed duct means 33 and 34 which taper toward one of the ends and are generally rectangular in cross section.
  • a plurality of generally tubular air bars B are ar ranged transversely in' respect to the direction of web movement through the housing and are secured and in fluid communication with the duct means 33 and 34, all as taught in the said U.S. Pat. No. 3,739,49l, or in the U.S. application Ser. No. 327,995, filed Jan. 30, I973, which issued on Dec. 4, I973, as U.S. Pat. No. 3,776,440.
  • a lower air bar and supply duct assembly LA is also provided within the housing and includes longitudinally disposed duct means 43 and 44 to which are attached the transversely positioned, tubular air bars B. These air bars B are in air receiving communication with the duct means 43, 44.
  • An air supply fan F is located within the housing and supplies air to the duct means 33, 34 and 43, 44 from the supply duct means 40, 41 and 42 in the known manner as taught in said patents.
  • the fan has an air inlet 50 located adjacent one side of the upper and lower assemblies and acts to suck the return air which has been discharged from the air bars, as will presently be described, back into the fan F for circulation through the duct system. Some of the return air is also exhausted via the exhaust duct 14.
  • the air bars B are an improvement over those shown in the said U.S. Pat. No. 3,739,491 and also an'imp rovement over the air bars shown in the U.S. Pat. No.
  • tents have been assigned to an assignee common with the present application.
  • the general purpose of the air bars is set forth in the said U.S. Pat. No. 3,549,070 and is for the purpose of floating sheet material in the nature of strips or webs so that the material does not touch any object as it moves through the high velocity dryer and is dried thereby.
  • the supply air that is received in the interior of the air bars is discharged, as shown in FIG. 5, under pressure, and through elongated slots 60, 61 which extend continuously along and adjacent each edge of the air bar.
  • the center of the air bar has a series of apertures or openings 65 extending along the length of the air bar and transversely to the direction in which the web moves.
  • a separate chamber is formed beneath the Coanda plate 63 and within the air bar, this chamber 70 extending along the length ofthe air bar and being opened at either of its ends, as shown by the openings 72 (FIG. 2) in the end walls 73 of the air bars.
  • the present invention provides an inner chamber in the air bars for removing the drying air which has been discharged against the web by the two opposing Coanda nozzles, and permitting this removed air to then flow lengthwise towards the ends of the air bars where it is discharged out of the openings 72 in each end of the air bars. This discharged air is then returned to the fan F or to the exhaust duct 14, as previously mentioned.
  • the chamber 70 is formed by the Coanda plate 63 and also by a lower plate 74 which is nested within the downwardly turned edges 76 of the Coanda plate 63, and this plate 74 is secured with the coanda plate 63 to define the air removing chamber 70.
  • a series of supports 77 extend across and within the air bar and act to accurately support the plates 63 and 74 so as to precisely form the Coanda slots 60 and 61.
  • the Coanda slots 60 and 61 are unobstructed by any welds and this furthermore contributes to a smooth and continuous Coanda flow of drying air over the curved Coanda nozzle surfaces.
  • the members 77 are welded at their ends to the side walls 78 of the air bar.
  • Air supply inlet openings 79 are formed in the bot tom. 79a of the bar.
  • the modification shown in FlG. 6 utilizes a series of tubular'exhaust members 81 which extend from the exhaust chamber 70 and exhaust air to the general interior ofthe dryer. This modification finds particular utility in dryers of wide webs and results in more uniform pressure in the exhaust chambers which would otherwise have a higher pressure in the center of the exhaust chamber and a lower pressure towards the ends of the exhaust chambers.
  • the high velocity air stream 82 issuing from the air slot 60 tends to follow the curved surface of the Coanda nozzle for a very short distance and then impinges directly on the web W across from the slot. This high velocity impingement is. sufficient to break through the boundary layer of the web and results in high heat transfer coefficients. A portion of this high velocity stream is then turned inwardly toward the center of the web and a portion is turned in the opposite direction along the web. That portion which is directed towards the center of the web follows along the web surface as indicated by the arrows and upon reaching the center of the air bar, a portion of this flow is then directed through the exhaust openings 65.
  • FIG. 6a shows a bar generally similar to the bar shown in FlG. 5 and corresponding elements have been similarly numbered. However, the shape of the mem bers adjacent the slotted nozzles are somewhat different and as shown.
  • the stagnation pressure of the air jets is extremely high at points 84 and 85 where they impinge against the web W. This pressure then drops off considerably and gradually increases until it reaches the point 86 at the center exhaust openings. Large decreases in the stagnation pressure indicate a particularly high kinetic energy level of air.
  • the percentage of initial nozzle pressure discharging from the slot is plotted against the ratio of the area of the center exhaust openings Ag in the air bar to the area A of both of the supply slot nozzles.
  • the impingement pressures increase from zero (not center exhaust openings) and to a maximum location where the ratio is approxivmately .75 to 1.0. It will also be noted from this graph that the floatation pressure does not appreciably drop but is generally uniform in that range.
  • An individual and replaceable air bar for floating a continuous running web and being elongated and of enclosed tubular shape and including opposite end walls, opposite side walls, and a generally flat plate located between said side walls, said plate having spaced apart longitudinal and curved edges and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles merge at the center of said plate, an exhaust chamber formed within said air bar and under said plate, and exhaust passage means generally in the center of and through said plate and communicating with said exhaust chamber whereby said opposed portions of said streams of air are directed through said exhaust passage means and into said exhaust chamber for removal therefrom.
  • An air bar set forth in claim 1 further characterized in that said exhaust chamber opens through each of the opposed end walls for discharge of air therefrom.
  • An individual and replaceable elongated and generally tubular air bar for positioning a running web and including opposite end walls, opposite side walls, a plate with spaced apart longitudinal edges locatable closely adjacent the running web to be supported, said plate located between said side walls, and a pair of air supply slots one extending along each of said edges to form air discharging nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said streams turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of nozzles move toward the center of said plate, an exhaust chamber formed within said air bar and under said plate, exhaust passage means generally in the center of and through said plate and communieating with said exhaust chamber whereby said portions of said streams of air are directed through said exhaust passagemeans and into said exhaust chamber for removal therefrom, and air supply inlet openings in said bar through which pressurized air is supplied to the interior of said air bar.
  • An air bar set forth in claim .5 further characterized in that said exhaust chamber opens through each of the opposed end walls for discharge of air therefrom.
  • An individual and replaceable air bar for being positioned transversely of and for floating a continuous running web, said bar being elongated and of enclosed tubular shape and including opposite end walls, two opposed side walls, and a Coanda plate between said side walls and having spaced apart and curved edges along its length and locatable closely adjacent the running web to be supported, said bar also having a pair of air supply slots one extending along each of said edges to form opposed Coanda nozzles therewith for directing a stream of pressurized air out of the interior of said air bar and against said web, a portion of said stream turning toward the center of said bar and along said web whereby said portions of said streams discharged by said pair of opposed nozzles tend to merge at the center of said Coanda plate, said supply slots being defined by said curved edges of said Coanda plate and said side walls, an exhaust chamber formed within said air bar and under said Coanda plate, said exhaust chamber being defined by said Coanda plate and also by another plate secured to said Coanda plate and within said air bar, and exhaust passage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Advancing Webs (AREA)
US403510A 1973-10-04 1973-10-04 High velocity web floating air bar having center exhaust means Expired - Lifetime US3873013A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US403510A US3873013A (en) 1973-10-04 1973-10-04 High velocity web floating air bar having center exhaust means
CA210,010A CA998709A (en) 1973-10-04 1974-09-25 High velocity web floating air bar having center exhaust means
GB4217574A GB1443679A (en) 1973-10-04 1974-09-27 Web-floating air bar
FR7433204A FR2246479B1 (enrdf_load_stackoverflow) 1973-10-04 1974-10-02
DE2447119A DE2447119C2 (de) 1973-10-04 1974-10-02 Gehäuseeinheit zum Schwebendführen und gegebenenfalls Trocknen von Bandmaterial auf einem Luftpolster
IT53354/74A IT1021694B (it) 1973-10-04 1974-10-03 Perfezionamento nei dispositivi per la manipolazione di materiali in na stro in particolare per la essicca zione ad aria di un nastro flottan te che si sposta ad alta velocita
JP49114285A JPS5844945B2 (ja) 1973-10-04 1974-10-03 連続状の運動する帯状物を浮動支持する空気柱装置
ES450241A ES450241A1 (es) 1973-10-04 1976-07-28 Barra de aire para la flotacion de papel continuo a alta ve-locidad, que dispone de medios de escape centrales.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US403510A US3873013A (en) 1973-10-04 1973-10-04 High velocity web floating air bar having center exhaust means

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US3873013A true US3873013A (en) 1975-03-25

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US (1) US3873013A (enrdf_load_stackoverflow)
JP (1) JPS5844945B2 (enrdf_load_stackoverflow)
CA (1) CA998709A (enrdf_load_stackoverflow)
DE (1) DE2447119C2 (enrdf_load_stackoverflow)
ES (1) ES450241A1 (enrdf_load_stackoverflow)
FR (1) FR2246479B1 (enrdf_load_stackoverflow)
GB (1) GB1443679A (enrdf_load_stackoverflow)
IT (1) IT1021694B (enrdf_load_stackoverflow)

Cited By (41)

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US4081201A (en) * 1976-12-27 1978-03-28 International Business Machines Corporation Wafer air film transportation system
US4131320A (en) * 1974-06-11 1978-12-26 Bertin & Cie Conveyor device for letters, cards or other thin article
EP0003414A3 (en) * 1978-01-27 1979-09-05 Spooner Edmeston Engineering Limited Float treatment apparatus
US4197973A (en) * 1978-10-12 1980-04-15 W. R. Grace & Co. High velocity web floating air bar having air flow straightening means for air discharge slot means
US4201323A (en) * 1978-10-12 1980-05-06 W. R. Grace & Co. High velocity web floating air bar having a recessed Coanda plate
US4247993A (en) * 1978-05-04 1981-02-03 Valmet Oy Nozzle apparatus for airborne paper web dryers
US4265384A (en) * 1980-01-21 1981-05-05 W. R. Grace & Co. Air bar having asymmetrical inlet
US4271602A (en) * 1978-08-17 1981-06-09 Jagenberg Werke Aktiengesellschaft Air nozzle for a jet dryer
US4384666A (en) * 1980-03-28 1983-05-24 Valmet Oy Nozzle apparatus for handling web material
DE3308869A1 (de) * 1982-03-15 1983-09-22 W.R. Grace & Co., 10036 New York, N.Y. Luftbalkenanordnung
DE3401539A1 (de) * 1983-01-24 1984-07-26 W.R. Grace & Co., New York, N.Y. Bahntrocknungsvorrichtung
US4472888A (en) * 1982-06-04 1984-09-25 Cary Metal Products, Inc. Coanda effect nozzle for handling continuous webs
US4767042A (en) * 1987-06-11 1988-08-30 Advance Systems Inc. Paper web handling apparatus having improved air bar with fine scale turbulence generators
US4768695A (en) * 1987-06-11 1988-09-06 Advance Systems, Inc. Air bar for paper web handling apparatus and having an air distributing chamber and perforated plate therefor
US4776107A (en) * 1987-10-30 1988-10-11 Wolverine Corporation Web treatment system
EP0291832A1 (de) * 1987-05-16 1988-11-23 Hilmar Vits Vorrichtung zum Trocknen von freigeführten Materialbahnen mittels freigeführter Luftkissendüsen
EP0247547A3 (en) * 1986-05-29 1988-12-07 E.I. Du Pont De Nemours And Company Improved setting/drying process for flexible web coating
EP0346080A1 (en) * 1988-06-07 1989-12-13 W.R. Grace & Co.-Conn. Tri-flotation air bar
US5014447A (en) * 1988-02-10 1991-05-14 Thermo Electron Web Systems, Inc. Positive pressure web floater dryer with parallel flow
US5017964A (en) * 1989-11-29 1991-05-21 Am International, Inc. Corona charge system and apparatus for electrophotographic printing press
US5019868A (en) * 1989-12-28 1991-05-28 Am International, Inc. Developer electrode and reverse roller assembly for high speed electrophotographic printing device
US5064979A (en) * 1990-08-07 1991-11-12 W. R. Grace & Co.-Conn. Microwave air float bar for drying a traveling web
USD322260S (en) 1988-08-05 1991-12-10 W. R. Grace & Co.-Conn. Air bar
US5077172A (en) * 1989-12-28 1991-12-31 Am International, Inc. Carrier web transfer device and method for electrophotographic printing press
US5092059A (en) * 1988-06-07 1992-03-03 W. R. Grace & Co.-Conn. Infrared air float bar
US5177877A (en) * 1989-12-28 1993-01-12 Am International, Inc. Dryer-fuser apparatus and method for high speed electrophotographic printing device
US5210961A (en) * 1989-11-15 1993-05-18 Stork Contiweb B.V. Drier with improved configuration of the air ducts
US5242095A (en) * 1990-12-20 1993-09-07 Advance Systems, Inc. Contactless air turn guide with baffles for running webs
US5261146A (en) * 1991-04-04 1993-11-16 Isover Saint-Gobain Creping machine
US5354007A (en) * 1990-06-13 1994-10-11 J. M. Voith Gmbh Web leader guiding device utilizing turbulence-generating nozzles
US5480086A (en) * 1988-09-19 1996-01-02 Fuji Photo Film Co., Ltd. Non-contact web conveying apparatus
US5590480A (en) * 1994-12-06 1997-01-07 W. R. Grace & Co.-Conn. combination air bar and hole bar flotation dryer
EP0733870A3 (en) * 1995-03-21 1997-07-16 Grace W R & Co Non-contact tape guide for air dryer
US5724259A (en) * 1995-05-04 1998-03-03 Quad/Tech, Inc. System and method for monitoring color in a printing press
US5951006A (en) * 1998-05-22 1999-09-14 Xerox Corporation Modular air jet array with coanda exhausting for module decoupling
JP3012359B2 (ja) 1990-01-16 2000-02-21 メグテク・システムズ・インコーポレーテツド ウエブを乾燥させる装置及びウエブ乾燥機
US20090260772A1 (en) * 2008-04-18 2009-10-22 Tamer Mark Alev Sheet Stabilization With Dual Opposing Cross Direction Air Clamps
US20100078140A1 (en) * 2008-09-26 2010-04-01 Honeywell Asca Inc Pressure Equalizing Baffle and Coanda Air Clamp
US20110131829A1 (en) * 2009-06-05 2011-06-09 Megtec Systems, Inc. Infrared Float Bar
US20170002490A1 (en) * 2015-07-01 2017-01-05 Teresa Catallo Device for allowing narrow collar material to be processed through a standard fabric compactor
WO2017134114A1 (de) * 2016-02-01 2017-08-10 Windmöller & Hölscher Kg Vorrichtung und verfahren zum trocknen eines bandmaterials einer druckmaschine

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US4197971A (en) * 1978-10-12 1980-04-15 W. R. Grace & Co. High velocity web floating air bar having an internal passage for transverse air discharge slot means
DE3044649C2 (de) * 1980-11-27 1982-11-18 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Aufstreichen von Bogen auf Druckzylinder von Druckmaschinen
JPS59100388A (ja) * 1983-09-16 1984-06-09 三菱アルミニウム株式会社 フロ−テイング乾燥用ノズル
US4785986A (en) * 1987-06-11 1988-11-22 Advance Systems, Inc. Paper web handling apparatus having improved air bar with dimensional optimization
US5035066A (en) * 1988-06-07 1991-07-30 W. R. Grace & Co.-Conn. Ultraviolet air floatation bar
GB2518150B (en) * 2013-09-11 2017-08-09 Landa Corp Ltd Drying apparatus for an indirect printing system
US10703093B2 (en) 2015-07-10 2020-07-07 Landa Corporation Ltd. Indirect inkjet printing system
GB201512145D0 (en) 2015-07-10 2015-08-19 Landa Corp Ltd Printing system
US10434764B1 (en) 2017-09-06 2019-10-08 Landa Corporation Ltd. YAW measurement by spectral analysis
EP3863859B1 (en) 2018-11-15 2024-10-02 Landa Corporation Ltd. Pulse waveforms for ink jet printing

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US3678599A (en) * 1969-10-09 1972-07-25 Vits Maschinenbau Gmbh Apparatus for a non-contacting stabilization of a web which is moved in its longitudinal direction
US3711960A (en) * 1971-08-26 1973-01-23 Overly Inc Web dryer

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US2144919A (en) * 1937-06-24 1939-01-24 Andrews And Goodrich Inc Apparatus for and method of drying web material
US3272415A (en) * 1963-03-19 1966-09-13 Svenska Flaektfabriken Ab Apparatus for stabilized transport of web-or sheet-like materials
US3281957A (en) * 1963-04-22 1966-11-01 Production Machinery Corp Apparatus for processing strip material
US3324570A (en) * 1965-02-25 1967-06-13 Proctor And Schwartz Inc Float dryer
US3549070A (en) * 1969-02-27 1970-12-22 Tec Systems Floatation of sheet materials
US3678599A (en) * 1969-10-09 1972-07-25 Vits Maschinenbau Gmbh Apparatus for a non-contacting stabilization of a web which is moved in its longitudinal direction
US3711960A (en) * 1971-08-26 1973-01-23 Overly Inc Web dryer

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131320A (en) * 1974-06-11 1978-12-26 Bertin & Cie Conveyor device for letters, cards or other thin article
US4081201A (en) * 1976-12-27 1978-03-28 International Business Machines Corporation Wafer air film transportation system
EP0003414A3 (en) * 1978-01-27 1979-09-05 Spooner Edmeston Engineering Limited Float treatment apparatus
US4247993A (en) * 1978-05-04 1981-02-03 Valmet Oy Nozzle apparatus for airborne paper web dryers
US4271602A (en) * 1978-08-17 1981-06-09 Jagenberg Werke Aktiengesellschaft Air nozzle for a jet dryer
US4197973A (en) * 1978-10-12 1980-04-15 W. R. Grace & Co. High velocity web floating air bar having air flow straightening means for air discharge slot means
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FR2438612A1 (fr) * 1978-10-12 1980-05-09 Grace W R Ltd Barre de support pneumatique de nappes continues a lame d'air
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Also Published As

Publication number Publication date
DE2447119C2 (de) 1984-11-29
FR2246479B1 (enrdf_load_stackoverflow) 1982-03-05
JPS5061754A (enrdf_load_stackoverflow) 1975-05-27
ES450241A1 (es) 1977-09-16
IT1021694B (it) 1978-02-20
DE2447119A1 (de) 1975-04-10
GB1443679A (en) 1976-07-21
JPS5844945B2 (ja) 1983-10-06
CA998709A (en) 1976-10-19
FR2246479A1 (enrdf_load_stackoverflow) 1975-05-02

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Free format text: MERGER;ASSIGNORS:GRACE MERGER CORP. A CT CORP. (MERGED INTO);W. R. GRACE & CO. A CT. CORP.;REEL/FRAME:005206/0001

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