Abstract: A web drying apparatus, comprises: a blow-drying part which has two blower units arranged on both sides of web which is transferred in a transfer direction, and injects gas onto the web passing through a dry path between the two blower units; a housing which has a sidewall provided with an opening facing the dry path from the transfer direction, through which the web passes in the transfer direction through the opening, and houses the blow-drying part; an exhaust part which is disposed between the sidewall and the blow-drying part in the housing and exhausts gas from the inside of the housing to the outside of the housing; and a rectifying member which is disposed between the blow-drying part and the exhaust part in the housing and faces the web being transferred in the transfer direction.

Abstract: Systems and methods are provided for balancing air flow in dryers of printing systems. The dryer includes a heating element, top flow generator, and bottom flow generator. The heating element is within the dryer, and heats a web of printed media. The top flow generator directly projects a first jet of gas onto a top side of the web. The first jet of gas deflects air proximate to the web. The bottom flow generator directly projects a second jet of gas onto an opposing side of the web. The second jet strikes the web at substantially the same location as the first jet, and compensates orthogonal force applied to the web by the first jet. Furthermore, the top and bottom flow generators are both oriented to project the jets partially in the direction of travel of the web.

Abstract: Apparatus and method for the non-contact drying of a web of material. The apparatus includes air flotation nozzles for floating the web, and direct air impingement nozzles for enhanced drying of the web. The nozzle arrangement is particularly well-suited to float and dry light weight webs under moderate to high tension. Increased cushion pressure is created to support the web preferably with the same horsepower as conventional arrangements. The increased cushion pressure pad of the nozzle arrangement allows for good flotation with reduced velocities below about 11,500 FPM. Machine direction wrinkles are removed and the result is positive flotation with no marking on the web or ink build up on the air bars. The nozzle arrangement includes pairs of flotation nozzles directly opposing pairs of direct impingement nozzles. A perforated member can be positioned between flotation nozzles within a pair of flotation nozzles to control return air.

Abstract: An air injection nozzle has an air injection face with a number of air injection holes arrayed at an interval (Py) in first and second staggered rows. The first row and the second rows are positioned at an interval (Px). The air injection face and the sheet running face confront each other at a distance (L). The air injection holes in the air injection face have a diameter (D). The interval (Px), the interval (Py), the distance (L) and the diameter (D) satisfy Formula (1): 6?(L/D)/(Px/Py)?9, and Formula (2): 4?L/D?8. This air injection nozzle is employed as a resin film heat treating apparatus in a tenter oven to be used for manufacturing the resin film.

Abstract: A drying device including: a travelling unit and a drying unit. The travelling unit transports a sheet-like substrate in a travelling direction. The sheet-like substrate includes a thin film body wherein at least one surface of the thin film body is coated with a coating material including an active material. The drying unit dries the thin film body. The drying unit includes a radiative heater and a first nozzle. The radiative heater irradiates an infrared ray to a to-be-dried surface of the thin film body. The first nozzle blows a dry air to the to-be-dried surface in a direction opposite to the travelling direction of the sheet-like substrate.

Abstract: An air injection nozzle has an air injection face with a number of air injection holes arrayed at an interval (Py) in first and second staggered rows. The first row and the second rows are positioned at an interval (Px). The air injection face and the sheet running face confront each other at a distance (L). The air injection holes in the air injection face have a diameter (D). The interval (Px), the interval (Py), the distance (L) and the diameter (D) satisfy Formula (1): 6?(L/D)/(Px/Py)?9, and Formula (2): 4?L/D?8. This air injection nozzle is employed as a resin film heat treating apparatus in a tenter oven to be used for manufacturing the resin film.

Abstract: An air injection nozzle has an air injection face with a number of air injection holes arrayed at an interval (Py) in first and second staggered rows. The first row and the second rows are positioned at an interval (Px). The air injection face and the sheet running face confront each other at a distance (L). The air injection holes in the air injection face have a diameter (D). The interval (Px), the interval (Py), the distance (L) and the diameter (D) satisfy Formula (1): 6?(L/D)/(Px/Py)?9, and Formula (2): 4?L/D?8. This air injection nozzle is employed as a resin film heat treating apparatus in a tenter oven to be used for manufacturing the resin film.

Abstract: A fiber treatment oven having slots for the fibers to pass through and adjustable gates located proximate the slots. The gates may be connected via a linkage that allows movement of many gates at once and may be connected so that individual gates may be adjusted as well.

Abstract: Rapid heating of a lithographic printing plate is achieved by feeding the printing plate along a substantially curved path that is adjacent to one or more curved pads of an air bearing that is pressurized with heated air. The one or more curved pads are constructed such that the substantially curved path is curved with an axis of curvature substantially perpendicular to the feed direction of the printing plate. The plate is additionally elastically bent to follow and conform to the substantially curved path. The substantially curved path minimizes printing plate distortion during heating, and thus prevents the plate from being damaged from contact with any of the one or more curved pads. The one or more curved pads are also arranged to allow for exceptionally good heat transfer characteristics and thus more effective plate heating.

Abstract: Disclosed is a drying apparatus equipped with linear drive mechanisms to drive spray nozzles in the direction perpendicular to the direction in which a wet object is transferred in the drying box. Each spray nozzle has a long discharge slit elongated in the direction in which the wet object is transferred. Two opposed nozzles are provided at each of the entrance and exit of the drying box. Each nozzle has an elongated slit traversing the width of the wet object in the direction perpendicular to the transporting direction, the opposed surfaces of the nozzles being so inwardly oblique that the gap between the opposed surfaces is larger at the inner edge than the outer edge.

Abstract: An improved apparatus and method for drying materials. A hot surface in a strong electrostatic field is used to ionize a stream of heated gasses passing over the surface, which assists in directing the stream against the object to be dried, and ionizes the vapors and gasses emitted from surface of the material being dried, which assists in their separation and removal.

Abstract: The preferred quality requirements postulated by producers for the product cold-rolled strip include, among good flatness and optimum thickness tolerances, also dryness of the strip in the outlet of strip rolling mills. Already existing devices that are disposed in the outlet of roll stands comprise stationarily installed and mobile partitions, a roll barrel and a roll strip venting device and a vapor escape. The aim of the invention is improve the aforementioned device by disposing above the rolled strip (10) a strip deflector (3) with an integrated fan-operated strip venting device (4) by means of a low-pressure nozzle (7) and an upper roll barrel gap seal (5) in the form of a slotted nozzle (6) and below the rolled strip (10) an extraction device (16) with integrated lower strip deflector (17).

Abstract: An apparatus for coating a moving web, in particular a paper or cardboard web, on one or both sides with a liquid or pastous coating material includes a coating station for applying the coating material onto the web, as well as a non-contact turning apparatus following the coating station in the moving direction of the web. The web moves in only one plane from the point of exit from the coating station to the point of entry into the non-contact turning apparatus, without changing direction.

Abstract: Apparatus and a method for the evaporative cooling of a web within a dryer in a compact manner. Excess fluid overspray is controlled, thereby avoiding problems with fluid depositing on internal surfaces of the dryer, which can cause mineral build-up and can result in web breaks or quality defects if fluid drips onto the web. More specifically, a water delivery system is used which directs a water mist to the web by appropriate design and placement of the spray nozzles. The quantity of water delivered to the web is regulated, and is preferably based upon web temperature. Excess mist is controlled by directing hot air to effectively vaporize the excess mist before it is able to contact the internal surfaces of the dryer enclosure and its internal components.

Abstract: A dryer has a blower and means for dividing an airflow into two separate chambers. A drying channel is defined between the two chambers and material to be dried passes along the channel. The walls between the chambers and the channel are apertured to allow air to flow into the channel. The channel increases in cross-sectional area along the length thereof such that air flowing along the channel is subject to a pressure drop. The air thus flows substantially in one direction along the channel.

Abstract: An apparatus for coating a moving web, in particular a paper or cardboard web, on one or both sides with a liquid or pastous coating material includes a coating station for applying the coating material onto the web, as well as a non-contact turning apparatus following the coating station in the moving direction of the web. The web moves in only one plane from the point of exit from the coating station to the point of entry into the non-contact turning apparatus, without changing direction.

Abstract: A nozzle arrangement in an airborne web-drying apparatus for drying a coated paper web (10) or the like. The nozzle arrangement comprises at least one overpressure nozzle (14), which is arranged to blow drying air both in the web's travel direction and against the web's travel direction. The nozzle arrangement comprises further a direct impingement nozzle (16) combined with the exit side and/or the entrance side (26) of the overpressure nozzle, in which direct impingement nozzle a plurality of nozzle slots or nozzle orifices (17) are formed in order to blow drying air mainly perpendicularly toward the web. The perpendicular distance (a1) from the nozzle surface (30) of the direct impingement nozzle (16) to the web is larger than the perpendicular distance (a2) from the supporting surface (32) of the overpressure nozzle (14) to the web.

Abstract: An object of the present invention is to provide a sterilizing liquid remover and a method of removing the sterilizing liquid which can easily remove/dry the sterilizing liquid which remains at the step portion formed by the sealing tape and the web which forms the container's interior side in the packing material web having the sealing tape adhered to its side end portion. Driblets on the surface of the web are squeezed by squeeze rollers 30 disposed such that they can open and close while sandwiching the transfer route of the web W having the sealing tape adhered to its side end portion therebetween, the heated air is blasted at the step portion formed by the sealing tape and the web by the second air knife 20, then the heated air is blasted at the whole width of both faces of the web by the first air knives 10, and the sterilizing liquid is removed.

Abstract: The invention discloses an apparatus for treating fabrics which comprises a first chamber for forming a reserve of infeed fabric, a second chamber for forming a reserve of outfeed fabric, first means for slowly infeeding the fabric into the first chamber, second means for slowly removing the fabric from the second chamber, a duct allowing for the passage therethrough of the fabric between the first chamber and the second chamber, fabric transport means capable of forward and backward operation which generates a forward and backward movement of the fabric between both chambers, and control means, operation of which causes inversion of the forward and backward movement, and collision members adapted to be impacted by the fabric, which move between a collision position and a free passage position in synchronism with the forward and backward movement of the fabric.

Abstract: A drying compartment for drying a printed web, consisting of a housing with intake and outlet openings for the web and with at least one infrared radiator directed at the web and/or with blower nozzles which blow hot air onto the web. In order to remove layers of air entrained by the web, turbulence generators are positioned above the web, or above and below the web.

Abstract: Method and apparatus for drying a coated paper web (W) or the like web. The apparatus (10) comprises sequentially in the running direction of the web—a turning device (16) arranged on the first side of the web and provided with blow nozzles (20), with which the running direction of the web to be dried is turned in a non-contacting way, and web drying devices (30, 30′) arranged on the first and the second sides of the web, in which the web is dried in a non-contacting manner. The apparatus further comprises a counterpart (18) provided with overpressure nozzles (24), arranged on the second side of the web at the point of the turning device (16), for stabilizing the web run by means of blows generating a local overpressure between the web (W) and the carrier surfaces of the overpressure nozzles (24).

Abstract: A method and flotation dryer unit effects drying of a web such as a coated paper web. The flotation dryer unit advantageously includes several nozzle boxes extending across the web for feeding drying air toward the web to be dried, a distribution chamber for drying air for leading the dry air into the nozzle boxes, and a suction chamber for gathering the drying air led toward the web from the web area and for directing it to the side of the web. The suction chamber is divided into an equalizing space and an air transport chamber by a perforated plate for equalizing the return air flow occurring from the web area.

Abstract: A nozzle array for levitational guidance of web material. The nozzle array includes a sequence of nozzle areas in the transport direction of the web which are peripherally encompassed at least in part by fanned jets and their width varies in the direction transversely to the web transport direction. The nozzle areas may be equipped with orifice nozzles. Located between the nozzle areas are return flow zones which may be configured as return flow passageways open towards the web, whereby their cross-section is flared in the direction of the edges of the nozzle array. The nozzle areas may be v-shaped relative to their longitudinal axis oriented in the transport direction of the web. Clusters of nozzle areas may be arranged juxtaposed as viewed in the web transport direction.

Abstract: In a device for conditioning a preferably freshly printed paper web (2) with a dryer (1) and a remoistening device, wherein the dryer (1) exhibits a heating zone (3), a temperature maintenance zone (4) and a cooling zone (5) and the remoistening device exhibits spray jets (10), arrayed above and below the transport surface of the said paper web (2), through which moisturizing agents can be admitted, and spray chambers (9) containing the same, a particularly compact form of construction is achieved, in that the cooling zone (5) of the dryer (1) contains a moisturizing device (8) for the purpose of remoistening and cooling the said paper web (2).

Abstract: A photographic paper drier device includes a conveyor belt for conveying the photographic paper along a conveying path. A fan or blower dries the photographic paper by application of air thereto while the photographic paper is conveyed along the conveying path. The fan or blower sends the air into an air blow case, which has an air blow wall extending along the conveying path, and being positioned opposite to the photographic paper. Plural outlet slits are formed through the air blow wall, and blow the photographic paper with the air. Each of the outlet slits extends in a crosswise direction crosswise to the conveying path. The outlet slits are arranged in 18 trains arranged along the conveying path. Each of the outlet slits has a length smaller than a width of the photographic paper.

Abstract: The invention provides an apparatus for the removal of liquid from the surface (0', 0") of a strip (B) conveyed from a strip processing machine, more particularly a rolling stand, by means of a gas jet (G1, G4, G5, Gzl, Gzr, G12-G18, G17', G18'), which has an outlet nozzle (2, 4, 5, 12-19) from which the gas jet (G1, G4, G5, Gzl, Gzr, G12-G18, G17', G18') emerges, and a suction opening (8a), via which the gas jet (G1, G4, G5, Gzl, Gzr, G12-G18, G17', G18') can be removed by suction mixed with the liquid, the apparatus enabling the surface of the strip to be adequately cleaned over its whole width. This is achieved by the feature that the gas jet (G1, G4, G5, Gzl, Gzr, G12-G18, G17', G18') is guided over the strip (B) in a flow (S, S2) directed towards at least one of the lateral edges (R) of the strip (B), and a suction opening (8a) is associated with that lateral edge (R) of the strip (B) at which the flow (S, S2) is directed.

Abstract: An apparatus for levitational guidance of a continuous web of material for the purpose of its heat-treatment is configured of individual zones. The form ducting of the zones has the shape of an U in the vertical longitudinal center section above and below the web in each case, the legs of the U being located parallel to the transport direction of the web. The legs adjacent to the web are equipped on the side facing the web with levitation nozzle ribs or nozzle areas. In the legs facing away from the web, a radial fan is incorporated in each U, the delivery direction of which is directed towards the turn joining the two U legs. Heating means are arranged to advantage in the heating zones in the region between the two legs of the U. Coolers may be incorporated to advantage in the region of the turn joining the two U legs.

Abstract: In a heat treatment installation a strip moves continuously past infrared radiant elements and elements for blowing air onto the strip. The installation comprises a succession of blower elements separated from each other by at least one infrared radiant element, each blower element having on each side of it a suction element near an infrared radiant element.

Abstract: A combination infrared/air convection dryer or oven for travelling webs. A shutter assembly is provided between the infrared radiation source and the moving web in order to selectively expose the web to infrared radiation, and to create a sealed air chamber when in the closed position. Enhanced drying of the web and/or a coating on the web at high speed is achieved without a concomitant increase in dryer length. When the drying atmosphere has a high concentration of solvent, exposure of that atmosphere to the heating elements, which can cause explosions, is eliminated by actuation of the shutters. In a preferred embodiment of the invention, air bars are used to floatingly support the moving web to avoid contact of the web with dryer elements.

Abstract: To provide uniform treatment criteria over the entire surface of a material web (10) in the region of a drying chamber (11), the treatment air or intake air is directed onto the material web (10) from above and below by means of slot nozzles (19, 24) from nozzle boxes (17, 18). The return air reflected from the material web (10) is conducted away upwards and downwards via return-flow ducts (25, 26) in the nozzle boxes (17, 18) into a collection space (34), on the one hand, and a return-air space (35), on the other hand.). The return air is conveyed upwards from the lower return-air space (35) through return-flow shafts (36, 37) into the region of the upper collection space (34).

Abstract: A drier for broad articles such as plasterboard has a conveyor in entraining the plasterboard along a drying path in a transport plane and the nozzle boxes for contacting the plasterboard with the drying air have their orifice surfaces inclined to the plasterboard to achieve uniformity of drying in terms of residual moisture content.

Abstract: Tenter driers are frequently used for drying textile webs whose edges have an increased weight per unit area or have been treated with glue. It is extremely difficult to dry the edges to the same degree of residual humidity as the remainder of the web. In the inlet region, the blower box has been replaced by blower pipes extending parallel to the chain rails. The pipes are connected to the recirculated air system of the drier and provided with nozzle apertures directed towards the web edges. Since only a low drying capacity is available, the drier either has to be extended or the throughput speed has to be decreased. With the drier according to the invention, a longitudinal section which starts at the inlet and extends over at least 20% of the total length is equipped with blower pipes (27, 28) aligned parallel to the chain rails (13, 14). Blower boxes (18, 19) are also mounted in this longitudinal section, both above and below the textile web (15).

Abstract: An apparatus and method for evaporating a coating solvent from a coating on a first substrate surface of a substrate and for minimizing the formation of mottle as the coating solvent is evaporating. A drying oven includes an enclosure having an inlet and an outlet and defining a first drying zone. A plurality of drying subzones are within the first drying zone. At least two of the plurality of drying subzones employ different and controllable drying conditions. Physical barriers are not required to create the plurality of drying subzones.

Abstract: A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.

Abstract: Air flotation dryer for floatingly drying travelling webs. The dryer includes a housing having a web inlet and a web outlet spaced from the web inlet, and a plurality of elongated air nozzles arranged transversely to the direction of movement of the web and preferably located on opposite sides of the web, the nozzles being secured directly to, supported by and in air-receiving communication with longitudinally extending supply air ducts. An air supply fan is in communication with the supply air ducts to supply air to the nozzles. Heat is provided to the apparatus with a draw-through style burner, which fires into the dryer enclosure and the proper amount of air flow to be heated by the burner (e.g.

Abstract: A fabric treatment apparatus for the treatment of a textile fabric, over the full width, with a fluid, which comprises at least one fabric treatment means provided with side walls which form a treatment path which allows fabric to pass through at full width while surrounding it at a narrow spacing and at least one treatment fluid blowing means constructed on at least a section of the side walls which can blow a treatment fluid into the treatment path to cover the entire width of the fabric passing through the treatment path, wherein the narrow spacing of the treatment path is 30 mm or less, and both ends of the treatment path are open to the surrounding atmosphere which is not pressurized. It efficiently performs various treatments on fabric including washing, desizing, scouring, fluff removal, resin impregnation, drying, dewatering, feeling adjustment and dyeing.

Abstract: A suspension dryer for freshly moisturized webs of swellable paper has a row of lower nozzle beams which extend transversely to a throughgoing direction so as to be spaced from one another along a dryer length with a distance from one another and provided at an upper side with blowing openings, a row of upper nozzle beams extending transversely to the throughgoing direction at a distance from one another along the dryer length so as to be offset relative to the lower nozzle beams and provided on a lower side with blowing openings, a width of the nozzle beams arranged in an initial portion of the dryer length is greater than a width of the nozzle beams arranged in the remaining portion of the dryer length, and a distance between two adjacent ones of the nozzle beams arranged in the initial portion is greater than a distance between two adjacent ones of the nozzle beams arranged in the remaining portion.

Abstract: The invention relates to improvements in drying webs and is applicable with particular advantage, although not limited to, a process carried out in a paper making machine; that of the application of `size` or `coating`.A web dryer (1) comprises two air bar assemblies (3,5) between which a web (7) travels, each air bar assembly (3,5) comprises a plurality of parallel and spaced apart air bars (9), each air bar (9) being elongate and arranged such that its longitudinal axis is transverse to the direction of travel (A) of the web (7), in which each of the air bar assemblies (3,5) includes at least two sets of air bar, a first set (13) comprises coanda air bars, and the second set (15) comprises jet impingement air bars.

Abstract: In a drying section of a paper making machine, the paper web is conducted through a plurality of single tier dryer sections and then transferred to at least one final double tier dryer section for completing the drying process. The paper web is threaded through the open draw between the single tier dryer sections and the double tier dryer section and through the open draws between the lower cylinders and the upper cylinders in the double tier dryer section by use of air jets which blow at the paper web from opposite sides thereof. The air jets include at least one jet which blows in a direction generally opposite to that of the paper web.

Abstract: In a drying section of a paper making machine, the paper web is conducted through a plurality of single tier dryer sections and then transferred to at least one final double tier dryer section for completing the drying process. The paper web is threaded through the open draw between the single tier dryer sections and the double tier dryer section and through the open draws between the lower cylinders and the upper cylinders in the double tier dryer section by use of air jets which blow at the paper web from opposite sides thereof. The air jets include at least one jet which blows in a direction generally opposite to that of the paper web.

Abstract: Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.

Abstract: A tentering oven comprises a heating furnace and a tenter. The heating furnace has multiple plenum ducts juxtaposed above and below a film in a direction perpendicular to the flow of the film for blowing hot air to heat the film. The tenter stretches the film transversely and comprises clip bodies, clip levers and liners provided on linked chains, as well as rails composed of chain directing rail members that progressively depart away from each other and a chain drive member. An oil pan is provided beneath a joint of the rail members and each of the plenum ducts is provided in such a way that the hot air discharge port of the ducts is not positioned immediately below the oil pan so as to ensure that the hot air blown from the plenum duct does not make direct contact with the bottom of the oil pan.

Abstract: An apparatus and method for evaporating a coating solvent from a coating on a first substrate and for minimizing the formation of mottle. A drying oven includes a plurality of air foils positioned adjacent to the second substrate surface. Each of the plurality of air foils have a foil slot through which a stream of drying gas is supplied to the drying oven. The foil slot length is adjusted to not be significantly greater than the first substrate width to minimize air flow over the first and second coating edges which minimizes the creation of mottle.

Abstract: An arrangement for lowering the noise level in connection with a cooling layer in a pulp dryer having a heat-insulated bottom wall and top wall constituting a sound-attenuating construction and a wall at the inlet side of the cooling layer also constituting a sound-attenuating construction. At the outlet side of the air flow from the cooling layer in the pulp dryer, sound-attenuation baffles are arranged preferably perpendicular to or inclined in relation to the direction of the air flow and which are placed at a distance from one another.

Abstract: The material web (1) is acted upon by heated circulating air which permeates with the aid of a fan (7) from a pressure chamber (14) via inlets (6, 6') into the nozzle casings (4, 4'). In order to achieve laminar flow and thus an improved distribution of air, the fan (7) is removed as far as possible from the inlets (6, 6') and preferably suspended beneath the cover-wall (16) of the housing (2). This results in a relatively large and longitudinally extended pressure chamber (14) between the inlets (6, 6') and the pressure side (12) of the fan (7).

Abstract: Device for drying a material in strip form (1), in particular paper in strip form, including on a frame (2) two series (S.sub.1, S.sub.2) of drying nozzles (3), delimiting in a plane (P) a corridor for the passage of the material in strip form over a path (T), each of the series of drying nozzles being located in a plane (P.sub.1, P.sub.2) substantially parallel to the plane (P), the drying nozzles being perpendicular to the path of the material, each nozzle comprising at least one narrow, longitudinal slit (4) suitable for allowing a drying gas (5), for example air, to flow therethrough; blocking means are provided for selectively neutralizing a plurality of areas (6) of at least one slit; these means are constituted by at least one comb element (7) positioned in the slit, the comb element comprising a base (8) placed inside the slit and teeth (9) flush with the surface of the slit, the teeth being separated by gaps (10) between which flows the gas escaping through the slit.

Abstract: Flotation drying apparatus for the staged (indirect) heating of solvent laden air recirculating within a drying enclosure, and a method of optimally controlling and directing solvent laden recirculation air such that condensation and sapping of solvent and various solvent-based by-products may be effectively reduced or eliminated. In addition to the reduction of condensate, a greater and more uniform mixing of the atmosphere within the drying enclosure is achieved, thereby enhancing safety and the drying process as pockets of high concentration solvent vapors are reduced. Air from outside the dryer enclosure is heated within the dryer enclosure, and is mixed with solvent-laden air. The mixed air is recirculated to the first drying zone of the dryer.

Abstract: A method of drying [apparatus for ] a strip of material or web, which may advantageously be performed by providing a drying apparatus including a conditioning zone immediately following but fully integrated with the [dryer] drying zone, to lower the bulk temperature of web. The web of material can be introduced to conditioned air which is substantially free of contaminants being evolved from the coating on the web. The temperature of the conditioned air is low enough to absorb heat from the web, effectively lowering the solvent evaporation rate, and can be controlled such that it is greater than the dew point of the contaminants being evolved from the web, thereby mitigating condensation that normally forms and visible vapors that form outside of the dryer enclosure. Pressure control is provided in the conditioning zone so that solvent vapors will not escape and so that ambient make-up air can be regulated as required.

Abstract: A device for drying strips of printed material includes a drying chamber through which the strips of printed material are carried, the drying chamber being divided into at least two sections by walls and being as gas-tight as possible in relation to the environment, at least one burner connected to the drying chamber by an outlet duct for discharging at least a portion of combustion gases and connected to the drying chamber by a feed duct for feeding to the burner gases saturated with solvents and structure for feeding fresh air to a first of the at least two sections being located at a first outer end of the drying chamber. The feed duct is connected to a second of the at least two sections.

Abstract: The invention relates to a method for air-drying material webs, in particular material webs of relatively high grammage such as pulp webs. The invention also relates to a nozzle-blow-box and a pulp dryer that make use of the method. Air blowings in a direction substantially perpendicular to the web and air blowings in a direction substantially parallel to the plane of the web are applied to the web to be dried from underneath the web. By means of these blowings, both heat is transferred to the web and the web is supported by the air free of contact, and the run of the web through the dryer is stabilized. In order to improve the transfer of heat in comparison with a planar carrier face, the air flow velocity parallel to the plane of the web is initially kept substantially invariable. The air flow velocity is lowered in the lateral areas of the carrier face by employing lateral areas of the nozzle-carrier face that become rampwise and/or stepwise lower in the air-flow direction.