Abstract: A heat treatment of a precursor that reacts with temperature, and that comprises in particular the steps of: preheating or cooling a heat-transfer gas to a controlled temperature, and injecting the preheated or cooled gas over the precursor. Advantageously, besides the temperature of the heat-transfer gas, the following are also controlled: the flow rate of the gas at the injection over the precursor, and also a distance between the precursor and an outlet for injection of the gas over the precursor, in order to finely control the temperature of the precursor receiving the injected gas.

Abstract: A seasoning apparatus includes: a table on which a stack of paper sheets is loaded; a ceiling plate which is arranged above the table to cover an upper side of the paper stack on the table; a front side plate and a rear side plate which are arranged to oppose to each other at front and rear sides of the paper stack on the table, at least one of the front and rear side plates being advanceable and retractable relatively to each other; a right-hand side plate and a left-hand side plate which are arranged to oppose to each other at a right-hand side and a left-hand side of the paper stack on the table, at least one of the right-hand and left-hand side plates being advanceable and retractable relatively to each other; and an air blowing device which blows air horizontally toward the paper stack on the table.

Abstract: In a gas wiping apparatus which blows gas through a wiping nozzle onto front and rear surfaces of a steel plate going out from a molten metal coating pot and running upward and which thereby controls a deposit mass, the wiping nozzle is separated into upper and lower lips, blocking faces partially closing a gas supply channel are formed in the upper and lower lips at vertically different positions on the opposite sides from each other in a gas outlet width direction, and the upper and lower lips are provided in such a manner as to be movable in a width direction of the steel plate.

Abstract: The present invention concerns a convective system for a dryer installation for a passing web, more particularly paper. The convective system 7 is an assembly of an exterior casing 13 for suction of combustion products with opening 14 towards the web, with a first 15 and second 16 suction ducts sucking the combustion products into the convective system 7. The combustion products coming from the first suction duct 15 are guided through the exterior casing 13 to a mixing and blowing device 17. Cold air 18 is mixed in this mixing and blowing device 17 with the combustion products 19, resulting in a gas mixture with lower temperature 20. The convective system 7 also has an internal casing 21 inside the external casing 13. This internal casing 21 has at least one opening towards the web 22 and has also openings 34 allowing gas flow from the mixing device 17 to the internal casing 21 of said gas mixture 20. Under the internal casing 21, there is also a blowing duct 23.

Abstract: A steam blower box unit having a steam blower box for applying steam to a passing material web, especially a paper or board web, and having a withdrawal device at least partly integrated in the steam blower box. The steam blower box, located opposite the material web in an operating position, can be moved out of its operating position laterally via the withdrawal device, that is to say generally transversely with respect to the web running direction, and can be moved into this operating position again from its lateral position. In this case, preferably the entire steam blower box can be moved appropriately via the withdrawal device.

Abstract: A process for pre-drying textile filaments after wet treatment and a device for practicing this process. The process consists essentially in applying simultaneously to a layer of wet filaments (3) passing by on a conveyor (4) with a permeable conveying surface, on the one hand, a mechanical squeeze-drying action and, on the other hand, a pressure difference by circulation of air through said layer (3).

Abstract: A method and apparatus for impingement of fluid onto a moving surface. The apparatus includes an asymmetric slot nozzle having an opening formed between an upstream wall and a downstream wall. The nozzle is disposed generally adjacent the surface onto which the fluid is to be impinged forming an impingement distance between each of the walls of the nozzle and the surface. The impingement distance of the upstream wall is greater than the impingement distance of the downstream wall such that at least a portion of the fluid is delivered through the nozzle in a direction that is counter to the machine direction.

Abstract: A vapor collection method and apparatus capable of capturing vapor compositions without substantial dilution. The method and apparatus utilize a material that has a surface with an adjacent gas phase. A chamber is positioned in close proximity to a surface of the material. The position of the chamber creates a relatively small gap between the surface of the material and the chamber. The adjacent gas phase between the chamber and the surface define a region possessing an amount of mass. At least a portion of the mass is drawn through the region by induced flow. The utilization of a small gap limits the flow of mass that is external to the chamber from being swept through the chamber by induced flow.

Abstract: A process and a device for pre-drying textile filaments after wet treatment. A process and a device for predrying textile filaments after wet-treatment consist essentially in applying simultaneously to a layer of wet filaments (3) passing by on a conveyor (4) with a permeable conveying surface, on the one hand, a mechanical squeeze-drying action and, on the other hand, a pressure difference by circulation of air through said layer (3).

Abstract: A process and an apparatus for removing water from a fibrous web are disclosed. The process comprises providing a fibrous web having a moisture content from about 1% to about 99%; providing an oscillatory flow-reversing impingement gas having a pre-determined frequency; providing a gas-distributing system comprising at least one discharge outlet designed to emit the oscillatory flow-reversing impingement gas onto the web; and impinging the oscillatory flow-reversing gas onto the web through the plurality of discharge outlets, thereby removing moisture from the web. The apparatus comprises a web support designed to receive a fibrous web thereon and to carry it in a machine direction; at least one rotary valve pulse generator designed to produce oscillatory flow-reversing air or gas; and at least one gas-distributing system in fluid communication with the pulse generator for delivering the oscillatory flow-reversing air or gas to 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: The present invention relates to an apparatus for cleaning a belt dryer (10) with at least one belt (18) running through a drying space (17) for receiving the products to be dried, and a cleaning nozzle emitting a cleaning agent into the drying space (17) of the belt dryer (10) the apparatus includes at least one nozzle (31, 32, 33; 61) arranged for traveling in the longitudinal direction (22) and/or transverse direction (29) of the belt (18). The invention relates furthermore to a belt dryer, in the drying space (17) of which at least one traveling slide (30, 44) and/or at least one extensible arm (60) is arranged, applied to the slide or arm is at least one nozzle (31, 32, 33; 61).

Abstract: Apparatus for treating material webs. For the purpose of treating material webs (10), especially drying them, these are acted on by a (heated) gaseous medium via slot nozzles (13, 14) in the area of a drying chamber (11). Depending on the operating conditions and the material web, the flow conditions of the gaseous medium must be capable of being adapted in the area of the material web, since the material web (10) may otherwise be adversely affected, for example as a result of an excessive supply of heat. The slot nozzles (13, 14) are designed in such a way that, in order to change the flow conditions, the exit of the gaseous medium from different nozzle slots can be adjusted by means of a control device, especially a slide device. By means of different outflow directions of the nozzles, an influence can be exerted on the flow conditions and the supply of heat, depending on the operating condition of the drying chamber (11).

Abstract: An air knife mouth arrangement for use in an air knife assembly having a laterally extending mouth through which pressurized fluid passes to operate on a coating applied to a surface of a sheet material passing the mouth in a longitudinal direction to control the thickness of the coating. In the preferred form of the invention shown the air knife mouth arrangement comprises a mouth defined by a pair of facing lips, each lip having in front elevation a curved shape along its length. The curved shapes of the two lips face each other. The lips of the air knife mouth arrangement are selectively laterally displaceable relative to each other by a moving means so as to thereby vary the separation of the lips and hence the width of the mouth along the length of the mouth.

Abstract: A system and method for providing conditioned air to a yarn traveling on a textile machine includes an air conditioning unit local to said textile machine and configured to receive input air and to condition the air to a first desired relative humidity. An air delivery conduit is in communication with the air conditioning unit and conveys the conditioned air therefrom. A diffuser is in communication with the delivery conduit so that the conditioned air flows into the diffuser. The diffuser defines a nonuniform opening so that the conditioned air leaves the diffuser in a turbulent flow. The opening is disposed at a predetermined distance from the yarn so that an air mixture, comprising the turbulent conditioned air and ambient air drawn into the turbulent flow, has a second desired relative humidity upon reaching the yarn.

Abstract: A process and an apparatus for removing water from a fibrous web are disclosed. The process comprises providing a fibrous web having a moisture content from about 10% to about 90%; providing an oscillatory flow-reversing impingement gas having frequency of from 15 Hz to 1500 Hz; providing a gas-distributing system comprising a plurality of discharge outlets designed to emit the oscillatory flow-reversing impingement gas onto the web; and impinging the oscillatory flow-reversing gas onto the web through the plurality of discharge outlets, thereby removing moisture from the web. The apparatus comprises a web support designed to receive a fibrous web thereon and to carry it in a machine direction; at least one pulse generator designed to produce oscillatory flow-reversing air or gas; and at least one gas-distributing system in fluid communication with the pulse generator for delivering the oscillatory flow-reversing air or gas to the web.

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: A web thread-up apparatus for a beltless double backer includes a coiled flexible band positioned at the downstream end of the double backer on a reel from which the band may be unwound in the upstream direction through the double backer heating section. A clamping device on the free end of the band is utilized to capture the downstream edge of a new corrugated web positioned at the upstream entry to the double backer. Rotation of the reel is reversed to rewind the flexible band into the coil, carrying the web with it through the heating section of the double backer. A downstream web drive conveyor receives the lead edge of the new web which is detached from the rewound clamping device.

Abstract: A double backer for curing the web bonding adhesive and drying the corrugated paperboard web utilizes a web holddown apparatus for maintaining the web in intimate drying contact with the lower heating units which does not require the use of a driven holddown belt. The holddown is provided instead by a series of parallel, flexible, closely spaced strips suspended above the web in the heating section and extending in the direction of web travel. The length of the holddown strips in contact with the web may be selectively varied.

Abstract: Method and equipment for the manufacture of corrugated paper products includes separate heaters for preparing liner and medium components. Data regarding these components is collected and an optimum conditioning for the components is determined. High voltage sensors, associated electronic circuitry and computer controls are used to determine surface moisture values.

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 double backer for curing the web bonding adhesive and drying the corrugated paperboard web utilizes a web holddown apparatus for maintaining the web in intimate drying contact with the lower heating units which does not require the use of a driven holddown belt. The holddown is provided instead by a series of parallel, flexible, closely spaced strips suspended above the web in the heating section and extending in the direction of web travel. Supplemental holddown force may be provided by banks of spring fingers supported above and in contact with the holddown strips on a transverse support rod which may be rotated to vary the amount of supplemental holddown force. Alternately, the holddown strips may comprise continuous cables in which one run of the cables rests upon the moving web to provide the web holddown and a second run includes high friction cable portions which are movable into driving contact with the upper surface of the web to pull it through the heating section, as for initial web thread up.

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: Apparatus for supplying treatment gas, such as for cooling, heating, wiping or drying is provided by a gas handling unit which has a body portion for receipt and discharge of the gas and a plurality of elongated nozzles which may be (a) rigid nozzles, or (b) flexible nozzles which assume a substantially rigid projecting position when gas is flowing through the nozzle and a collapsed retracted or partially collapsed position when gas is not flowing. The unit may discharge gas in more than one direction. Certain preferred arrangements of nozzles are provided. The nozzles preferably have an inlet portion which is of greater cross-sectional area than the outlet portion and may have an inlet portion which is generally cylindrical cooperating with a generally conical outer discharge portion. In a preferred embodiment, the gas treatment apparatus may be employed in cooling metal coils. An associated method is provided.

Abstract: A method and device for contact-free treatment of a web in which the web is treated, for example supported, reversed, spread, carried, and/or dried, by blowings which provide a carrier-face zone. The carrier-face zone has a curved form regulatable in a direction transverse to the direction of progress of the web. The nozzle-carrier face unit of the device is bent to the curved form in the cross direction of the machine while a frame part of the device is kept in a stationary position. The device includes a regulation arrangement for bending the nozzle-carrier-face unit to a curve form in the direction transverse to the running direction of the web while the frame part of the device is supported in a stationary position.

Abstract: Method and apparatus for eliminating the danger of inadvertent failure of a weight-bearing retraction system, such as a dryer hood retraction system. A load lifted using a fluid cylinder can be easily locked in place against gravity by using a double rod ended cylinder, where the rod end not exerting the force is permitted to move through a clearance hole while the load is being lifted, and is then blocked to prevent the return motion until the load is to be released.