EP0346081B1 - Barre de support pneumatique - Google Patents

Barre de support pneumatique Download PDF

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Publication number
EP0346081B1
EP0346081B1 EP19890305719 EP89305719A EP0346081B1 EP 0346081 B1 EP0346081 B1 EP 0346081B1 EP 19890305719 EP19890305719 EP 19890305719 EP 89305719 A EP89305719 A EP 89305719A EP 0346081 B1 EP0346081 B1 EP 0346081B1
Authority
EP
European Patent Office
Prior art keywords
air
web
bar
lamp
channel
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
Application number
EP19890305719
Other languages
German (de)
English (en)
Other versions
EP0346081A1 (fr
Inventor
Richard J. Wimberger
Kenneth J. Moran
Michael O. Rocheleau
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
Original Assignee
WR Grace and Co Conn
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
Priority claimed from US07/203,076 external-priority patent/US5092059A/en
Priority claimed from US07/203,138 external-priority patent/US5035066A/en
Application filed by WR Grace and Co Conn filed Critical WR Grace and Co Conn
Publication of EP0346081A1 publication Critical patent/EP0346081A1/fr
Application granted granted Critical
Publication of EP0346081B1 publication Critical patent/EP0346081B1/fr
Expired 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection

Definitions

  • the present invention relates to an air float bar for use in positioning, drying or curing a continuous planar flexible material for example a web, printed web, news print, film material, or plastic sheet.
  • WO87/05644 discloses an air float bar which overcomes the disadvantages of the prior art dryers by providing an electromagnetically radiating air float bar to replace existing air float bars in web dryers.
  • the energy emitting lamp In addition to air flow of dry air from the web-supporting air flow slots at the upper and outer extremities of the air float bar, the energy emitting lamp, with a lens and optionally a reflector positioned between the air flow slots, transmits electromagnetic radiation to the traversing web.
  • the drying of the traversing web is accomplished by impingement of a combination of both heated web-supporting air flow and electromagnetic radiation.
  • the combined concentration of heat from the web-supporting air flow and the electromagnetic radiation from the lamp is of a sufficient magnitude to allow the web to dry at a higher speed than normal prior art speed.
  • the pre-characterising portion of claim 1 is based on WO87/05644.
  • an air flotation bar comprising: an air bar header including a bottom, opposing sides affixed to said bottom, end plates affixed between said bottom and said sides, a support plate affixed between said bottom and said sides, a support plate affixed to said sides, a fixed air bar channel secured to said plate and forming air discharge slots between said sides and each side of said fixed air bar channel for web-supporting air; at least one lamp within said fixed air bar channel for emitting electromagnetic radiation to impinge on a web passing and being supported by said air flotation bar, and a lens arranged at upper ends of said fixed air bar channel whereby said lens provides a pressure pad area between said air discharge slots; characterised in that said support plate has holes to conduct air to said air discharge slots; and in that said lens is carried by a removable channel supported in said air bar channel between and spaced from said air discharge slots, with opposing electrical connector means in said removable channel, and said at least one lamp mounted between said connector means.
  • the electromagnetic energy may, for example, be ultra-violeviol
  • the electromagnetic energy emitted by the lamp serves to enhance accelerated heating of a web material to cause solvent evaporation, drying or curing.
  • Electromagnetic heat energy in combination with columns of heated air impinging upon the web surface provides for concentrated heating of the web material thereby providing subsequent rapid evaporation, drying or curing from the surface of the material.
  • the present invention thus provides an air float bar having a radiant lamp for the generation and transmission of ultra-violet electromagnetic radiation by itself or in combination with a heated web-supporting air flow upon a web traversing through the dryer.
  • the lamp is located between the slots for the web discharging air flow and at the point of highest heat transfer, namely between the air flow slots.
  • Ultra-violet or infra-red electromagnetic energy may pass in a straightforward, direct manner through the lens to impinge upon a traversing web, but may also be reflected in an indirect manner from a reflector surface (where present) and through the same lens to impinge upon the traversing web.
  • An air supply duct may introduce cooling air into an enclosed terminal chamber and about the area containing the lamp, and overboard through an opposing enclosed terminal area.
  • an air bar header member provides the framework for support and includes V or like channels on each side for the inclusion of an internal diffusion plate. Lips on the upper portion of the air bar header form one edge of air outlet slots, which may optionally use the Coanda effect, and a fixed position channel member forms the other portion of the slots. In that case the fixed position channel member includes Coanda curves.
  • a removable channel fits inside a fixed position channel and contains the lamp, a reflector and a lens element.
  • An enclosed terminal box juxtaposes with each end of the removable channel member containing the lamp, the reflector, and the lens element.
  • a cooling air supply duct placed in close proximity with one enclosed terminal box supplies cooling air which flows through the enclosed terminal chamber, through the area surrounding the lamp, through an opposing enclosed terminal chamber and finally through an exhaust air duct channel.
  • Oval air supply inlets on the bottom of the air bar header provide air flow for the web-supporting air slots.
  • the air float bar of the present invention offers an increased heat transfer rate per unit size of the air bar which is a practical alternative solution to increasing production requirements.
  • the air float bar of the present invention can be used to dry products that require high controlled heat and non-contact support.
  • This air float bar can be used in curing of pre-impregnated products such as polymer coatings that require airing, and are affected by high air impingement rates.
  • the air float bar can also be used for drying of low solids coatings, and water-based coatings that are sensitive to high air impingement during the first stages of drying process.
  • the air float bar can also be used for drying water based coatings on steel strip webs which require high controlled heat loads. Because of the ability to switch the lamp on or off almost instantly, the air bars can be run with cold convection air for support, and the lamp can be used as the only heat source so that the bar is useful for drying webs that cannot endure high temperatures and that experience frequent web stops.
  • FIG 1 illustrates a perspective view of an air float bar 10 of the present invention, for use in drying a web in a web dryer.
  • Externally visible members of the air float bar 10 include a channel-like air bar header 12 with opposing sides 14 and 16, a bottom 18, and opposing and parallel vertically aligned air bar end plates 20 and 22 affixed between sides 14 and 16.
  • V channels 24 and 26 are formed and aligned horizontally in sides 14 and 16 to accommodate an air bar mounting flange as later described in detail.
  • V channel 26 is illustrated in Figure 2.
  • a fixed air bar channel 28 aligns longitudinally in a precise manner between the upper regions of sides 14 and 16 to provide for forming longitudinally aligned and uniformly sized Coanda slots 30 and 32 for web-supporting air as later described in detail.
  • a second removable channel 34 including an ultra-violet lamp 36 and a quartz lens 38, is accommodated in a sliding fashion by the fixed air bar channel 28.
  • Air supply ducts 40 and 50 fit adjacent to covered terminal chambers 42 and 44 at each end of the removable channel 34 of the air float bar 10 and provides cooling air for the ultra-violet lamp 36.
  • the cooling air passes through the air supply ducts 40 and 50, through the covered terminal chambers 42 and 44, into the removable channel 34, thus cooling the ultra-violet lamp 36, and leaks out of the ultra-violet lamp chamber through the clearance provided between the quartz lens 38 and the cover plates 46 and 48 for the terminal chambers 42 and 44.
  • the covered terminal chamber 42 includes a cover plate 46, and covered terminal chamber 44 includes a cover plate 48.
  • the covered terminal chamber 44 is secured above the air duct channel 50. Solvent-laden air is kept from the interior of the chamber in which the ultra-violet lamp resides by pressurization of the covered terminal chambers 42 and 44 and the area therebetween.
  • a plurality of oval-shaped air inlets 52a-52n positioned on the bottom surface 18 of the air bar header 12 serves to supply drying air through the air bar header 12 to the Coanda slots 30 and 32.
  • Figure 2 illustrates a cross-sectional view of the air float bar 10 taken along line 2-2 of Figure 1; all numerals correspond to those elements previously described.
  • the removable channel 34 and the ultra-violet lamp 36 are accommodated by the fixed air bar channel 28.
  • a diffuser plate 54 with a plurality of holes 56a-56n secured between sides 14 and 16 serves to provide for even flow of drying air from the plurality of oval-shaped air inlets 52a-52n.
  • a support plate 60 positioned between V channels 24 and 26 includes a plurality of holes 62a-62n.
  • a plurality of holes 64a-64n align longitudinally in two rows along the support plate 60.
  • the bottom 18, sides 14 and 16, and the diffuser plate 54 define a first chamber 66.
  • the diffuser plate 54, sides 14 and 16, and the support plate 60 define a second chamber 68.
  • the fixed air bar channel 28 is secured by welding or other suitable attachment to the support plate 60, and includes sides 70 and 72, Coanda curves 74 and 76, and horizontal planar surfaces 78 and 80 at right angles to sides 70 and 72.
  • Lips 82 and 84, as extensions of sides 16 and 14, extend inwardly at right angles to form Coanda slots 30 and 32 between the ends of lips 82 and 84 and Coanda curves 74 and 76, respectively, each slot being of a finite size.
  • Chamber 86 is formed by the fixed air bar channel side 70, the outer portion of support plate 60, the upper portion of side 16, and the lip 82.
  • chamber 88 is formed by the fixed air bar channel side 72, the outer portion of support plate 60, the upper portion of side 14, and the lip 84.
  • the area between the Coanda slots 30 and 32, known as the pressure pad 89, includes the quartz lens 38, the ultra-violet lamp 36, and the reflector 100.
  • Removable channel 34 is illustrated inserted within the fixed air bar channel 28.
  • the quartz lens 38 which can also be manufactured of other material, is essentially rectangular in shape and includes shoulders 90 and 92 which correspondingly engage beneath ends 94 and 96 of the removable channel 34.
  • a trough-like reflector 100 is illustrated as parabolic, but may also be any other desired geometrical shape and may be fashioned of a suitable material such as stainless steel, aluminium, or other reflective material.
  • the reflector 100 includes planar feet 102 and 104 along the edge of the reflector 100 and a curved portion 106 therebetween. The curved portion 106 of the reflector 100 is positioned against the bottom member 34a of the removable channel 34.
  • the planar feet 102 and 104 spring against the quartz lens 38 to ensure engagement of the shoulders 90 and 92 of the quartz lens 38 against the end portions 94 and 96 of the removable channel 34.
  • Rectangular Teflon terminal mounting blocks 110 and 112, for mounting of the ultra-violet lamp 36 and related components, are secured to a mounting plate 114 with machine screws 116 and 118.
  • Opposing sides 120 and 122 of a clip style mounting bracket 124 engage over the flat ultra-violet lamp end terminal 126 as machine screws 128 and 130 bring tension to bear upon the clip-style mounting bracket 124. While a single ultra-violet lamp 36 is illustrated, a plurality of lamps mounted in a parallel fashion can be used for applications requiring yet even more ultra-violet magnetic radiation. Larger air float bar assemblies can include multiple parallel ultra-violet lamps to transmit ultra-violet electromagnetic radiation to a traversing web.
  • Figure 3 illustrates a cross-sectional side view of the air float bar 10 taken along line 3-3 of Figure 1; all numerals correspond to those elements previously described.
  • Figure 3 illustrates the air float bar 10 secured to and across dryer framework members 132 and 134.
  • a bracket 135 affixed to the air supply duct 40 is secured to framework 132 by machine screws 136 and 138.
  • a bracket 140 aligned beneath the upper horizontal portion of the framework 132 provides vertical positioning of the air float bar 10.
  • Bracket 140 is secured to the mounting bases 141 and 143 in the air bar end plate 20 with the machine screws 142 and 144.
  • Another bracket 146 is secured to mounting bases 145 and 147 in the air bar end plate 22 by machine screws 148 and 150.
  • the air duct channel 50 is secured to the underside of the covered terminal chamber 44.
  • a bracket 152 secured to the bottom of the air duct channel 50 serves to provide support for the air duct channel 50 and associated components.
  • a bracket 152 is secured to the framework 134 by machine screws 154 and 156.
  • Teflon mounting blocks 160 and 162 similar to the Teflon mounting blocks 110 and 112 are secured to a mounting plate 164 with machine screws 166 and 168 as also illustrated in Figure 4.
  • Opposing sides 170 and 172 of the clip style mounting bracket 174 engage over the flat ultra-violet lamp end terminal 175 as machine screws 176 and 178 bring tension to bear upon the clip style mounting bracket 174 as also illustrated in Figure 4.
  • Air duct channel 50 houses common electrical bus bars 180 and 182 which extend to and between other parallel mounted air float bars.
  • the bus bars 180 and 182 are secured to the upper side of stand-off insulators 184 and 186 which are secured to the air duct channel with machine screws 188 and 190.
  • Connector pads 192 and 194 are secured through the bus bars 180 and 182 to the stand-off insulators 184 and 186.
  • a typical connector cap 196, fitted over and about the connector pad 192, has a wire 198 connected to the ultra-violet lamp end terminal 175 via a mounting bracket 174.
  • Another connector cap 200 is connected between the connector pad 194 with wire 202 to the opposing end terminal 126 of the ultra-violet lamp via the mounting bracket 124 as illustrated in Figure 4.
  • the wires 198 and 202 pass through orifices 204 and 206 in the air duct channel 50 and through orifice 208 in the removable channel 34.
  • Access cover plate 46 and cover plate 48 are secured to the upper side of the removable channel 34 with a plurality of machine screws 210a-210n (omitted from Figures 1 and 2), and are removable for the purpose of accessing the end areas of the ultra-violet lamp 36 and the associated electrical hardware.
  • Orifices 212, 204 and 206 in the air supply duct 40 ports transfer cooling air from the air supply ducts 40 and 50 to the covered terminal chambers 42 and 44.
  • cooling air can be channeled from the covered terminal chambers 42 and 44 to flow about the convex side of the reflector 100.
  • FIG 4 illustrates a top cutaway view of the air float bar 10; again all numerals correspond to those elements previously described.
  • This Figure illustrates the placement of the ultra-violet lamp 36 within the confines of the removable channel 34, and the location of the mounting brackets 124 and 174 with the associated hardware.
  • Figure 5 best illustrates the mode of operation 214 of the air float bar 10. Again all numerals correspond for those elements previously described.
  • a plurality of ultra-violet electromagnetic energy rays 216a-216n increase the drying capacity because the ultra-violet lamp 36 is located at the point of highest heat transfer, namely between the Coanda slots 30 and 32, and radiate from the ultra-violet lamp 36 either directly or indirectly through the quartz lens 38.
  • the ultra-violet drying energy is transmitted for heating a traversing web 218 being processed in a dryer.
  • a plurality of the ultra-violet rays 216a-216n reflect off the parabolic reflector 100 and through the quartz lens 38 to impart ultra-violet drying energy upon and to heat the web 218.
  • the lamp 36 is positioned at a point of maximum energy transfer.
  • the pressurized air flow paths 220a-220n proceed as indicated by dashed arrow lines through the first chamber 66, through holes 56a-56n of the diffuser plate 54, into the second chamber 68, through the pluralities of holes 62a-62n and 64a-64n of the support plate 60, through chambers 86 and 88, through the Coanda slots 30 and 32 along Coanda curves 74 and 76, and then inwardly along the upper surface of the quartz lens 38 and upwardly, thus providing float lift for the web 218 and also carrying away solvent vapors in the web.
  • Direct and indirect ultra-violet energy rays 216a-216n impinge on the web and heat the web 218 as it passes over the pressure pad 89, thus drying and evaporating solvents from the web 218. This, in combination with impinging air flows 220a-220n, maximizes the heat transfer in the area of the pressure pad 89.
  • Output of the lamp 36 can be variably controlled, such as by an SCR, so that the amount of energy output transmitted from the lamp 36 can be chosen from a range extending from full power to no power.
  • the lamp 36 is an infra-red lamp.
  • the mode of operation will be exactly as described above regarding the use of ultra-violet emission.
  • the wavelength of the infra-red electromagnetic rays 216a-216n emitted from the ultra-violet lamp 36 in Figure 5 can be short with a wavelength of .78 to 1.2 microns, medium wavelength with a wavelength of 1.2 to 4.0 microns or long wavelength of 4.0 to at least 10 microns.
  • any suitable wavelength of energy-imparting electromagnetic radiation may be selected.
  • Figures 6A-6D illustrate arrangements of pluralities of radiant air float bars with respect to a traversing web 270.
  • Figure 6A illustrates a plurality of radiant air float bars 272a-272n positioned below a traversing web 270.
  • Figure 6B illustrates a plurality of radiant air float bars 274a-274n positioned above a traversing web 270.
  • Figure 6C illustrates a plurality of radiant air float bars 276a-276n and a plurality of radiant air float bars 278a-278n in an opposing vertically aligned arrangement about a traversing web 270 for rapid drying of the traversing web 270.
  • Figure 6D illustrates a plurality of radiant air float bars 280a-280n and a plurality of radiant air float bars 282a-282n arranged in alternating opposing vertical arrangement about a traversing web 270 creating a sinusoidal shape for the traversing web 270.
  • Figure 7 illustrates air flow from an air bar, which enters through an orifice in the reflector, around the lamp, and out through holes in the lens.
  • Figure 8 illustrates air flow from an air bar, which flows between the reflector and the lens, around and about the lamp, and exits through holes in the lens.
  • Figure 9 illustrates an air bar, in which air enters through holes in the lens, passes around and about the lamp, and exits through ends of the removable channel.
  • Figure 10 illustrates a radiant unit, comprising a lamp and a reflector, external to and interposed between two air flotation bars.
  • Figure 11 illustrates horizontally interposed radiant units employing an ultra-violet lamp and a reflector in alternate vertical opposition with air flotation bars.
  • Figure 12 illustrates horizontally interposed radiant units with opposing air flotation bars, in direct vertical opposition.
  • the air bar can also be used to cure or dry adhesive coatings on a web, encapsulated coatings, and like applications.
  • the air bar also provides for enhanced quality of drying or treatment of a web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Claims (21)

  1. Barre de support par veine d'air comprenant :
       un socle de barre d'air comprenant un fond (18), des côtés opposés (14, 16) fixés audit fond, des plaques extrêmes (20, 22) fixées entre ledit fond et lesdits côtés, une plaque de support (60) fixée auxdits côtés, un canal de barre d'air fixe (28) fixée à ladite plaque et formant des fentes de sortie ou d'évacuation d'air (30, 32) entre lesdits côtés et chaque côté dudit canal de barre d'air fixe en vue de l'air supportant le tissu; au moins une lampe à l'intérieur dudit canal de barre d'air fixe pour émettre une radiation électromagnétique qui est incidente ou heurte un tissu passant et qui est supportée par ladite barre de support par veine d'air, et une lentille (38) disposée aux extrémité supérieures dudit canal de barre d'air fixe par quoi ladite lentille réalise une zone tampon de pression entre lesdites fentes de sortie ou d'évacuation d'air; caractérisé en ce que ladite plaque de support présente des trous pour conduire de l'air auxdites fentes de sortie ou d'évacuation d'air; et en ce que ladite lentille est portée par un canal amovible (34) supporté dans ledit canal de barre d'air (28) entre et espacé desdites fentes de sortie d'air, avec des moyens connecteurs électriques opposés (120, 124; 170, 174) dans ledit canal amovible, et ladite au moins une lampe (36) étant montée entre lesdits moyens connecteurs.
  2. Barre de support par veine d'air selon la revendication 1, dans laquelle le trajet de l'énergie électromagnétique radiant de ladite lampe passe directement à travers ladite lentille pour transmettre de l'énergie électromagnétique au tissu traversant.
  3. Barre de support par veine d'air selon la revendication 1 ou 2, dans laquelle lesdits moyens connecteurs électriques opposés comprennent des moyens de blocs de connexion ou de fonction opposés dans ledit canal amovible, dans laquelle ladite lentille est une lentille à quartz engagée en-dessous desdites extrémités supérieures dudit canal amovible, et dans laquelle un réflecteur (100) est positionné entre ladite lampe et ledit canal amovible.
  4. Barre de support par veine d'air selon la revendication 3, dans laquelle le trajet de l'énergie électromagnétique radiant de ladite lampe est réfléchie par ledit réflecteur et à travers ladite lentille de quartz pour communiquer de l'énergie ultraviolette au tissu traversant.
  5. Barre de support par veine d'air selon l'une des revendications 1 à 4, dans laquelle ladite lampe est positionnée au point de transfert optimum d'énergie.
  6. Barre de support par veine d'air selon l'une des revendications 1 à 5, dans laquelle ladite lampe radie de l'énergie électromagnétique ultraviolette.
  7. Barre de support par veine d'air selon l'une des revendications 1 à 5, dans laquelle ladite lampe radie de l'énergie électromagnétique infrarouge.
  8. Barre de support par veine d'air selon la revendication 7, dans laquelle ladite énergie infrarouge est constituée par des ondes courtes de 0,78 à 1,2 microns.
  9. Barre de support par veine d'air selon la revendication 7, dans laquelle ladite énergie infrarouge est constituée par des ondes moyennes de 1,2 à 4,0 microns.
  10. Barre de support par veine d'air selon la revendication 7, dans laquelle ladite énergie infrarouge est constituée par des ondes longues de 4,0 à au moins 10 microns.
  11. Barre de support par veine d'air selon l'une des revendications 1 à 10, et comprenant des moyens (40, 50) pour faire passer de l'air entre les extrémités dudit canal amovible afin de refroidir ladite lampe et pour rincer l'air chargé de solvant.
  12. Barre de support par veine d'air selon la revendication 11, dans laquelle lesdits moyens de passage d'air (40, 50) sont pressurisés par de l'air froid, et le flux d'air est une extrémité ouverte à une ouverture dans une surface côté inférieur dudit canal amovible.
  13. Barre de support par veine d'air selon l'une des revendications 1 à 12, comprenant des courbes Coanda opposées (74, 76) sur ledit canal de barre d'air.
  14. Barre de support par veine d'air selon l'une des revendications 1 à 13, comprenant un trou de refroidissement longitudinal dans ladite lentille de quartz.
  15. Barre de support par veine d'air selon l'une des revendications 1 à 14, dans laquelle, en cours d'utilisation de la barre, un flux d'air supportant le tissu heurte le tissu traversant afin de sécher ledit tissu.
  16. Barre de support par veine d'air selon l'une des revendications 1 à 15, dans laquelle de l'énergie électromagnétique de ladite lampe heurtant ledit tissu traversant sert à sécher ledit tissu.
  17. Système de support de flottation de tissu comprenant une pluralité de barres de support par veine d'air selon l'une des revendications 1 à 16, positionnées en-dessous du tissu traversant.
  18. Système de support de flottation de tissu comprenant une pluralité de barre de support par veine d'air selon l'une des revendications 1 à 16, positionnées au-dessus du tissu traversant.
  19. Système de flottation de tissu selon les revendications 17 et 18 considérées conjointement, dans lequel lesdites barres de support par veine d'air sont opposées l'une à l'autre sur des côtés opposés du tissu.
  20. Système de flottation de tissu selon les revendications 17 et 18 considérées conjointement, dans lequel lesdites barres de support par veine d'air sont disposées alternativement sur des côtés opposés dudit tissu.
  21. Barre de support par veine d'air selon l'une des revendications 1 à 16, dans laquelle l'entrée d'air (52a...52n) de l'air supportant le tissu est réalisée dans le fond (18) du socle de barre d'air.
EP19890305719 1988-06-07 1989-06-07 Barre de support pneumatique Expired EP0346081B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US203138 1988-06-07
US07/203,076 US5092059A (en) 1988-06-07 1988-06-07 Infrared air float bar
US07/203,138 US5035066A (en) 1988-06-07 1988-06-07 Ultraviolet air floatation bar
US203076 1988-06-07

Publications (2)

Publication Number Publication Date
EP0346081A1 EP0346081A1 (fr) 1989-12-13
EP0346081B1 true EP0346081B1 (fr) 1992-12-23

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EP19890305719 Expired EP0346081B1 (fr) 1988-06-07 1989-06-07 Barre de support pneumatique

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EP (1) EP0346081B1 (fr)
DE (1) DE68903999T2 (fr)

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EP0508253A1 (fr) * 1991-04-12 1992-10-14 Van Brandwijk Systems Programming B.V. Procédé et dispositif de traitement thermique d'une bande continue munie d'une composition fluide ou pâteuse
EP0508254A1 (fr) * 1991-04-12 1992-10-14 Van Brandwijk Systems Programming B.V. Procédé et dispositif de traitement thermique d'une bande continue munie d'une composition fluide ou pâteuse
CA2078290A1 (fr) * 1991-10-24 1993-04-25 W.R. Grace & Co.-Conn. Secheur combinant l'infrarouge et l'air chaud
FR2710971B1 (fr) * 1993-10-06 1995-12-29 Infra Rouge System Dispositif de déviation sans contact pour matériau en feuille.
EP0743178A3 (fr) * 1994-11-17 1997-02-19 Lts Trocknungsverfahren Gmbh Dispositif de guidage pour feuilles et/ou bandes imprimées dans des systèmes de séchage
FR2771161B1 (fr) * 1997-11-14 2000-01-14 Solaronics Systeme convecto-radiatif pour traitement thermique d'une bande continue

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US4646446A (en) * 1985-11-04 1987-03-03 American Screen Printing Equipment Company UV curing apparatus
FI75008C (fi) * 1986-03-14 1992-02-17 Valmet Oy Svaevtork och foerfarande foer effektivering av dess funktion.
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

Also Published As

Publication number Publication date
DE68903999D1 (de) 1993-02-04
EP0346081A1 (fr) 1989-12-13
DE68903999T2 (de) 1993-04-29

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