Abstract: The invention may utilize shaft horsepower for rotating cylinders to move a fluid in an axial direction within the cylinder. The cylinder may comprise a spiral blade on or in its inner surface with a pitch relative to a central axis of the cylinder. The blade's pitch may be variable or uniform with respect to the central axis. In some applications, plural blades may be positioned within the cylinder. The invention is particularly suitable for imparting kinetic energy sufficient to assist with the evacuation of condensate from a paper dryer cylinder with reduced or no blow through steam. The invention also has applications for spinner wheels.

Abstract: The invention may utilize shaft horsepower for rotating cylinders to move a fluid in an axial direction within the cylinder. The cylinder may comprise a spiral blade on or in its inner surface with a pitch relative to a central axis of the cylinder. The blade's pitch may be variable or uniform with respect to the central axis. In some applications, plural blades may be positioned within the cylinder. The invention is particularly suitable for imparting kinetic energy sufficient to assist with the evacuation of condensate from a paper dryer cylinder with reduced or no blow through steam. The invention also has applications for spinner wheels.

Abstract: A support apparatus and method is disclosed for supporting a syphon within a rotating cylinder. The apparatus includes a hub which is disposed within the rotating cylinder. The hub has a first and a second end, the hub defining a bore which extends between the ends of the hub for rotatably supporting the syphon. A first, second and third arm extend from the hub, each of the arms extending radially outwardly from the hub. Each of the arms has an inner and an outer extremity. The inner extremities of the arms are disposed adjacent to the hub. Also, the outer extremities of the arms are disposed adjacent to an internal surface of the rotating cylinder such that the arms and the hub support the syphon within the rotating cylinder while permitting rotation of the rotating cylinder relative to the syphon.

Abstract: A shoe device secured to a syphon is disclosed for removing condensate from an internal surface of a rotating cylinder. The shoe device includes a shoe portion which is disposed adjacent to the internal surface of the rotating cylinder. The shoe portion defines a passageway having an upstream and a downstream end. The passageway permits a flow there through of the condensate from the internal surface of the rotating cylinder, through the upstream end of the passageway to the downstream end of the passageway. The shoe portion has a first and a second side, a surface extending between the first and second sides of the shoe portion. The surface is disposed adjacent to the internal surface of the cylinder. The shoe portion also has a leading and a trailing end and a face extending between the leading and trailing ends of the shoe portion. A clamp is secured to a distal end of the syphon and is connected to the shoe portion for clamping the shoe portion to the syphon.

Abstract: A shoe device secured to a syphon is disclosed for removing condensate from an internal surface of a rotating cylinder. The shoe device includes a shoe portion which is disposed adjacent to the internal surface of the rotating cylinder. The shoe portion defines a passageway having an upstream and a downstream end. The passageway permits a flow there through of the condensate from the internal surface of the rotating cylinder, through the upstream end of the passageway to the downstream end of the passageway. The shoe portion has a first and a second side, a surface extending between the first and second sides of the shoe portion. The surface is disposed adjacent to the internal surface of the cylinder. The shoe portion also has a leading and a trailing end and a face extending between the leading and trailing ends of the shoe portion. A clamp is secured to a distal end of the syphon and is connected to the shoe portion for clamping the shoe portion to the syphon.

Abstract: A through-air dryer is disclosed. The through-air dryer includes a cylindrical deck made from a plurality of deck plates that support a throughdrying fabric. The deck plates are supported by opposing hubs. Each of the hubs is in communication with a bearing that is mounted to a stationary shaft for allowing the cylindrical deck and the hubs to rotate. The bearings are positioned so as to create a through-air dryer structure that remains stable during operation and allows for easy calculation of loads on the dryer.

Abstract: The invention relates to a drying cylinder which is used to dry a paper, cardboard, tissue or other web of fibrous material in a machine for the production and/or for the transformation thereof. The drying cylinder includes a support body and an external cover layer which is heated by a hot fluid. The thermal flow passing through the external cover layer is increased such that at least one cavity is provided between the support body and the external cover layer through which the fluid flows. The external cover layer is predominately so thin that the ratio formed by the thermal conductivity of the material and the thickness of the external cover layer is greater than a threshold value of 3.2 kW/m2K for steel, 30 kW/m2K for aluminum, 18 kW/m2K for bronze alloys, 3.4 kW/m2K for copper and 6.1 kW/m2K for magnesium.

Abstract: A dryer bar apparatus of a dryer for drying a web in a papermaking machine includes a number of turbulence bars circumferentially spaced equidistantly around the inner surface of the dryer shell for generating turbulence within a layer of condensate. The arrangement is such that uniformity of the transfer of thermal energy in the cross machine direction is maximized while the transfer of thermal energy through the dryer shell from the inner to the outer surface is minimized. Also, the number of turbulence bars is determined by the equation: N=int{2?Ri/[4?(Ri/d)½+W]} in which: N=the number of turbulence bars in the dryer shell; int=an integer number of a value in { } brackets; ?=3.1415; Ri=the inside radius of the inner surface of the dryer shell in inches; d=an average depth of the layer in inches; W=a width of each of the turbulence bars in inches.

Abstract: A device for drying a paper web includes a structured fabric for carrying the paper web rests during the drying process. A single roll unit includes a suction roll for dewatering the paper web and a press roll for securing the paper web to the structured fabric. The paper web is dried by hot air while on a drying drum.

Abstract: Apparatus for treating a fibrous web that includes at least one supporting surface arranged to support a surface of the fibrous web, and at least one sealing device positionable adjacent a surface of the web opposite the surface of the web supported by the at least one supporting surface. The at least one sealing device includes a positionably adjustable sealing element. A distance between the positionably adjustable sealing element and the surface of the web opposite the surface supported by the at least one supporting surface is adjustable.

Abstract: A through-air dryer is disclosed. The through-air dryer includes a cylindrical deck made from a plurality of deck plates that support a throughdrying fabric. The deck plates are supported by opposing hubs. Each of the hubs is in communication with the bearing that is mounted to a stationary shaft for allowing the cylindrical deck and the hubs to rotate. The bearings are positioned so as to create a through-air dryer structure that remains stable during operation and allows for easy calculation of loads on the dryer.

Abstract: A blow box (18) for supporting the web run in a paper machine or the like, which blow box comprises members for maintaining a negative pressure at least in one negative pressure region (24) between the wire (20) and the blow box. The members comprise a blocking member (30, 32), which is arranged, regarding the wire's running direction, at the beginning and/or at the end of said negative pressure region, which extends across the wire and projects towards the wire, and which is movable in relation to the blow box, and blowing members (34, 36), with which air is ejected with blows between said blocking member and the wire from said negative pressure region and/or with which air is prevented from entering this negative pressure region.

Abstract: A micropore drying apparatus having a variable wet flow resistance. The flow resistance preferably decreases in the machine direction. The micropore drying apparatus may comprise a single integral unit having an decreasing wet flow resistance from the beginning to the end of the unit. Alternatively, the micropore drying apparatus may comprise a plurality of discrete units, each unit having a successively lesser flow resistance than that of the preceding unit. Alternatively, a hybrid arrangement may be used wherein each discrete unit has a successively decreasing flow resistance within that unit. The micropore drying apparatus may comprise one or more micropore drying media. The micropore drying media have pores which allow air flow therethrough. The pores are disposed in a grid, to form a field of pores. The decreasing flow resistance may preferably be provided by adjusting one or more of said pores, which affect the flow resistance through a single pore or through the entire field of the pores.

Abstract: A rotary joint for a heat transfer drum using a stationary syphon pipe system. The syphon pipe is supported on a syphon tube adjustably mounted upon the rotary joint body whereby the distance between the syphon pipe intake and the drum shelf can be very accurately adjusted and maintained. Also, the syphon pipe is mounted upon the syphon tube in a pivotal manner to permit ready installation of the syphon system and employs a locking threaded sleeve arrangement assuring accurate location of the syphon pipe relative to the syphon tube upon the syphon pipe pivoting to its operative position.

Abstract: An apparatus for drying a wet web of paper comprising at least one through-air dryer, each dryer including a rotatable cylinder having a porous cylindrical deck, at least one continuous drying fabric wrapped about a portion of the circumference of the deck, a plurality of fabric support members positioned relative to each cylinder so as to direct the fabric and the web onto and from each cylinder, and a hood and a plenum cooperating to form a substantially sealed enclosure containing each cylinder. The drying fabric is adapted to support and transport the paper web about a portion of the circumference of the cylinder of each dryer.

Abstract: A rotary steam heated roll of the type having a series of circumferentially spaced, generally parallel and axially extending condensate channels or open-ended steam tubes in the cylindrical outer wall, includes at least one condensate removal pump associated with a channel or steam tube to positively pump condensate which rims at high speed radially inward to the center of the roll for discharge. A preferred embodiment includes a plurality of small piston pumps driven in response to roll rotation and timed to provide sequential circumferential operation.

Abstract: A steam-heated roll having a longitudinal axis and a roll center, comprising substantially axially extending heating passages for heat supply arid removal, and discharge passages for condensate dewatering extending substantially radially from the heating passages to the roll center. The discharge passages include at least one cross-sectional constriction for effecting a turbulent mixing of condensate mixed with the steam during passage through the discharge passages.

Abstract: A screen drum design is known whose drum jacket consists of axially extending sheet metal strips whose widths extend in the radial direction. These sheet metal strips must be permanently attached to the end bottoms to produce the drum jacket. According to the invention, this connection is made movable. For this purpose, a connecting element (17) is provided that consists of one or two connecting arms (18, 19) connected with one another so that they are pivotable with respect to one another, said arms being connected, with articulation at their free ends, with either sheet metal strips (13) or a centering ring (29) for the sheet metal strips, or with bottoms (11, 12) that are located at a distance from the ends of sheet metal strips (13) and/or centering ring (29). In this way, movement of the drum jacket relative to bottoms (11, 12) is always possible to compensate for dimensional changes resulting from temperature fluctuations.

Abstract: A machine for drying a continuous web is provided. At least one drying cylinder around which the web is dried is provided. The cylinder includes a sleeve which transfers heat from steam in the cylinder to an outer surface which contacts the web. The sleeve includes, on an inner periphery thereof, circumferential grooves separated from each another by ribs. At least one of the grooves has a width at its radial outer end which is wider than a width at its mouth at a radial inner end. At least one of the ribs has a width at its radial outer end which is smaller a width at its radial inner end.

Abstract: In the device disclosed, a paper web is carried on a belt and stabilized by an underpressure produced by a box opposite the roll, the paper web being sucked by the underpressure against the belt. Located in the box, immediately following the underpressure zone, may be a pressure zone which assists to transfer the paper web to the roll. In an alternative embodiment, a fan can be avoided. Instead the air entrained by the rapidly running belt is deflected by a wedge-shaped deflector and passed over a slit to generate an underpressure inside the box.

Abstract: A coupling in connection with a paper/board machine, preferably a steam, condensate and/or water coupling. The coupling frame has an exhaust connection for condensate or water in an end thereof and includes an annular groove into which a piston is placed. One or more springs are placed between the end of the piston and the bottom of a respective spring socket in the coupling frame and act upon the piston. The frame includes fastening members for fixing the frame to a bearing housing of the cylinder or to a part connected therewith.

Abstract: An apparatus and a method are indicated for a paper-making machine, for delivering liquid from a first level in a first space, through a line into a second space on a second, higher level, under the action of a difference in the gas pressures over the liquid in the first space and in the second space. A throttle valve in the line is controlled, to regulate the fluid flow, in such a way that the throttle valve is at least partly closed when the gas flow through the line rises, and is opened when there is little gas flow through the line. This guarantees continuous delivery of liquid, stable flow conditions prevail, and a delivery that is largely free of pulsation is achieved with a low proportion of gas (FIG. 2).

Abstract: When drying a paper web (4) in a dryer section (1) of a paper machine provided with drying cylinders (2, 3) and drying wires (5, 6), shrinkage of the paper web in cross direction is counteracted by applying forces at its edge portions (11). According to the invention partial vacuum is maintained along the edge portions of the web within substantially the entire free draw (10) and is applied from the side of the drying wire (5, 6) facing away from the web (4) so that the web is sucked firmly against the drying wire by forces greater than the contracting forces acting in cross direction, thereby counteracting shrinking, said partial vacuum being set within the interval 0.1-0.8 bar, preferably 0.2-0.5 bar.

Abstract: An arrangement for removing condensate from an interior of a drying cylinder in a paper machine and a method for regulating the removal of such condensate. The arrangement includes a steam pipe through which steam is passed into the space in the interior of the drying cylinder, and a condensate pipe and fluidly connected syphon pipe through which condensate is removed from the interior of the drying cylinder. The steam pipe and the condensate pipe are passed through a revolving axle journal of the drying cylinder. The arrangement also includes a syphon support attached in the interior of the drying cylinder to revolve along with the drying cylinder and support the syphon. A support bearing is arranged to attach to the syphon support and the syphon support is connected with the construction of condensate and steam pipes.

Abstract: Disclosed is a method for reducing the moisture content of a paper web in a papermaking process from in the range of 10% to 32% dry to the range of 33% to 50% dry wherein the embryonic web is supported on a knuckled through drier fabric and lightly pressed between the knuckled through drier fabric and a capillary membrane of a capillary dewatering roll. The capillary membrane has capillary pores therethrough which have a substantially straight through, non-tortuous path with a pore aspect ratio of from about 2 to about 20. A vacuum is drawn within the capillary dewatering roll which is not greater than the negative capillary suction pressure of the capillary pores.

Abstract: An improved steam heated corrugating roller includes an inner heating steam chamber constructed with a longitudinal cone shape with the exit for condensates at the wider end. Conduits are connected through the wider ends to a ring shaped housing. A ring is placed in the housing and includes several independent sectors which allow for radial movement between two positions vis a vis the bottom of the housing. This allows the conduits to remain open when the roller is spinning and closed when it is not spinning.

Abstract: A jacket with a thermally insulating layer partially surrounds, at a small spacing, a heatable roll which serves for the treatment of webs of material, in particular paper webs. Under production conditions the jacket reduces heat losses from the roll through convection and radiation to the environment. The jacket has a device which, with an interruption of production, ensures a forced convection at the heated roll for the cooling of the surface to a temperature level which is same or only insubstantially higher than in the production state. Several cooling nozzles are conceivable for the said apparatus which are secured to the jacket and direct a coolant onto the roll surface.

Abstract: A processing roll adapted to engage paper or the like to heat and/or shape the same. The roll has a cylindrical side wall and defines a interior condensing chamber for steam. The interior surface of the roll is formed with longitudinal grooves which slope away from the longitudinal axis toward a central location. The steam condensates in the chamber, collects in the grooves, and flows toward a center location where the condensate is siphoned out and removed from the chamber. Improved heat transfer is achieved, and greater uniformity of heat is accomplished at the outside surface.

Abstract: A processing roll adapted to engage paper or the like to heat and/or shape the same. The roll has a cylindrical side wall and defines a interior condensing chamber for steam. The interior surface of the roll is formed with longitudinal grooves which slope away from the longitudinal axis toward a central location. The steam condensates in the chamber, collects in the grooves, and flows toward a center location where the condensate is siphoned out and removed from the chamber. Improved heat transfer is achieved, and greater uniformity of heat is accomplished at the outside surface.

Abstract: A stationary syphon system for heat exchanger rolls, particularly suited for use with steam heated rolls wherein condensate must be removed from the roll chamber, utilizing a pivoted pick-up conduit mounted upon a journal conduit which is rigidly supported against radial deflection by a bearing interposed between the journal conduit inner end and the roll structure. The bearing may be mounted within a tube insertable into the journal bore to facilitate maintenance and replacement, and the condensate receiving end of the pick-up conduit is very accurately positioned with respect to the roll chamber inner surface by a positive locking arrangement remotely operated at the journal outer end.

Abstract: The invention pertains to apparatus for thermally insulating selected portions of a cylindrical dryer drum, usually adjacent the drum ends, for the purpose of obtaining a substantially uniform drum shell temperature throughout its length to obtain a uniform moisture profile throughout the width of the web being dried. A plurality of cylindrical segments are bolted together within the drum interior to define a circumferential assembly biased against the drum inner surface. The segments each include a thermal insulation material engaging the drum shell preventing direct access of that engaged portion of the shell with the steam within the drum thereby reducing the exterior temperature of the drum shell at the location of the thermally insulated segment. The segments may be bolted together, widthwise, to increase the axial dimension of the temperature controlling segment assembly.

Abstract: A method and device for the continuous transport of a liquid-gas mixture from an inlet reservoir having a first liquid level to a discharge chamber having a second liquid level includes a suction tube connecting the inlet reservoir and the discharge chamber, a gas separator disposed in the suction tube, and a conduit through which a gas passes to the second liquid level.

Abstract: An elevation part (10) added under the nozzle (11) of a condensate pick-up shoe in a steam cylinder (4), by which part a desired liquid level can be produced in the cylinder.

Abstract: This invention pertains to apparatus for removing heating or cooling fluid from a rotary heat exchange device comprising a hollow shell defining a shell chamber with an inner surface and an outer surface. The shell has first and second ends and a generally horizontal longitudinal axis extending between the ends. Thus, the shell defines axial directions along the axis, radial directions transverse to the axis and circumferential directions around the axis. The exchanger desirably also includes an inlet means for admitting a heat exchange fluid such as steam into the shell, and a shaft extending along the longitudinal axis, the shaft being at least partially hollow so as to define a shaft chamber. The apparatus also includes at least one set of collecting members, and typically involves several sets of such members. Each set of collecting members includes first and second radially-extensive and axially-extensive collecting members, mounted for rotation in unison with one another about the axis.

Abstract: A hollow shaft bearing for a drying cylinder of a paper machine. The hollow shaft bearing is provided with thermal insulation between the interior of the hollow shaft and the surface of the journal on which a bearing is supported. The insulation is formed by a coaxial annular space formed between the inside wall of the hollow shaft and the outside wall of the hollow shaft which supports the bearing.

Abstract: A low differential pressure rotary syphon for the purpose of removing condensate from the interior of steam a heated dryer drum under low differential pressure conditions. The reduction in the magnitude of differential pressure required to remove the condensate is accomplished through the direct introduction of steam into a central plenum area receiving condensate thereby reducing the mass density of the condensate mixture. The reduction in mass density and the steam introduced acting directly on the condensate within the central plenum area facilitates the removal of the condensate from the drying drum interior.

Abstract: A condensate suction pipe rotating with the drying cylinder extends from the area of the axis of rotation of the drying cylinder toward the inside surface of the cylinder shell, and has there a suction opening for the intake of condensate mixed with steam. A steam blowing line originating from the cylinder interior empties in the area of the suction opening into the interior of the condensate suction pipe. The steam blowing line is fashioned as an annular channel defined by the radially outer (relative to the cylinder axis) area of the condensate suction pipe and by an outside pipe surrounding the condensate suction pipe.

Abstract: A heated roll comprising a hollow cylindrical shell (10) with a syphon pipe (14) passing into the roll from a rotary joint (13) mounted on an end thereof. A non-rotating part of the rotary joint is mounted with a clearance fit on a pair of fixed parallel guide bars (22). Jacking screws (27) threadingly engaged within a cross bar (26) attached to the non-rotating part of the rotary joint, bearing upon each guide bar thus to enable the longitudinal axes of the rotary joint (13) and the roll shell (10) to be relatively adjustable thus to determine and set an accurate position for the inner open end of the syphon pipe (12) close to the inner wall of the shell (10).

Abstract: An apparatus and method are provided wherein a cavity defined by a rotating hollow member, such as a draw roll in a fiber processing system, is supplied with a hot fluid so as to heat the exterior surface of the hollow member. The fluid is withdrawn from the cavity and passed through a rotating syphon conduit which is fixedly connected to the hollow member. The temperature of fluid flowing within the syphon conduit is detected by a suitable temperature detector positioned within the syphon conduit so as to indicate a drop in fluid temperature when normal fluid flow to the hollow member cavity is interrupted.

Abstract: Device for removal of condensate from a revolving steam heated drying cylinder or the like. A condensate standpipe rotates with the drying cylinder and features a suction mouthpiece with a suction opening forming an inlet group with the inside wall of the cylinder shell. There is provided, in the area of the suction mouthpiece, at least one guide device which imparts to the steam/condensate mixture entering the condensate standpipe a rotation about the standpipe axis. This guide device enables a reduction of the amount of steam required for dewatering of a drying cylinder. The device is preferably used in dewatering the drying cylinders of a paper machine.

Abstract: A device for condensate removal from a steam-heated rotatable drying cylinder having a condensate suction pipe rotating with the drying cylinder and featuring a suction mouthpiece on the inside surface of the cylinder shell. A steam blowing line extends from the area of the axis of rotation of the drying cylinder into the interior of the suction mouthpiece. The mouth of the steam blowing line located there is arranged a maximally short distance from the inside surface of the cylinder shell and is directed and/or aligned on the condensate suction pipe.

Abstract: A hollow journal extending from a dryer drum is provided with an internal tube defining an angular insulating space between the inner wall of the hollow journal and the tube. This space is sealed at the inner end adjacent to dryer drum and is vented at the opposite end so that the insulating space is vented to atmosphere thereby provide a simple mounting system for mounting the fluid transfer passages through the dryer drum head and journal structure that better insulates the journal from the tube.

Abstract: A siphon tube assembly for papermaking dryer drums having a threaded rotary elbow connection between support and siphon tubes permitting the tubes to be selectively oriented by rotation of the elbow connection between an installation position wherein the tubes are in general alignment and an operative position wherein the tubes are angularly related. In a preferred embodiment, the siphon tube is braced in rigid engagement with the interior of the dryer drum for use as a rotating siphon, it being also contemplated that the present elbow joint may be embodied in stationary siphons. The elbow joint provides an operating keyway accessible through the interior of the support tube for manipulating rotation of the elbow joint without requiring the use of handholes or manholes in the dryer durm.

Abstract: A condensate agitator is provided for use in paper machine dryer cylinders. The agitator comprises a generally cylindrical open-work body which overlies portions of the interior surface of the dryer cylinder with its outer surface lying in flush engagement therewith. A modular agitator construction is also disclosed for facilitating installation of the agitator in a dryer cylinder without requiring the use of fasteners in accordance with a method for that installation which is also disclosed.

Abstract: A drying cylinder, which can be steam heated, has the following features: The cylinder shell has on its internal surface circumferential grooves in which condensate from the steam collects; to remove the condensate from the drying cylinder there is provided at least one condensate collection pipe, extending at right angles over the circumferential grooves, to which several suction pipes extending into the grooves are connected; in the direction of the flow of the condensate, in front of the inlet region of each individual suction pipe, there is provided a condensate conveying element which has a guide surface parallel to the bottom of the circumferential groove; the guide surface always lies between the bottom of the circumferential groove and the inlet end of the suction pipe.

Abstract: A rotary siphon in the steam-filled internal chamber of the rotating cylindrical shell in a paper or cardboard machine dryer has a hollow conical housing which defines with the internal surface of the shell an annular suction gap and spacedly surrounds a conical insert whose base abuts against the internal surface of the shell. The housing and the insert define an annular channel whose radially outermost portion communicates with the gap and whose radially innermost portion communicates with the interior of a condensate evacuating conduit. The condensate accumulates along the internal surface of the shell and is compelled to flow radially inwardly by way of the gap and channel and into the conduit due to the establishment of a pressure differential between the channel and the internal chamber of the shell.

Abstract: Substantially uniform heat transfer through the cylindrical heat transfer wall of a steam heated hollow dryer drum is attained by longitudinal spoiler bars effecting turbulence of condensate throughout a major extent of the inner surface of the heat transfer wall, and condensate turbulence is generated in a narrow annular area from which a stationary siphon intake head withdraws the condensate from the steam chamber. A turbulence promoter is carried by the intake head and may comprise rigid or yieldably supported structure, e.g. a brush, rigid or flexible bar structure, an array of fingers, mounted on the downstream or off-running side of the intake head having regard to the direction of rotation of the drum.

Abstract: A relatively stationary pipe or conduit, for the removal of a condensate or liquid from the interior of a steam heated rotatable drying drum or cylinder assembly and adapted for connection to a source of relatively low or sub-atmospheric pressure, has an inner end portion, disposed within the drum or cylinder assembly, which is provided with an inlet opening or port disposed in juxtaposition and close proximity to an inner cylindrical surface of the cylinder assembly; the inlet opening has a generally rearwardly situated wall which is substantially inclined as with respect to a radial plane of the cylinder assembly as to provide for enhanced transitional flow of the condensate from the inner cylindrical surface of the cylinder assembly to the condensate-removing pipe or conduit.

Abstract: A mechanism for drying a traveling web such as employing a steam heated dryer drum in a papermaking machine with the drum being supported on end bearings in journals in a frame and a rigid condensate removal tube extending through one of the journals with its inner end adjacent the inner surface of the drum and the drum having a rotary steam seal through which the tube passes with a pivotal mount for the rigid tube and a micrometer adjustment which adjusts the pivotal position of the tube so that the inner end of the tube being cantileverly supported can be adjusted accurately relative to the inner surface of the drum.

Abstract: A steam heated cylindrical dryer drum for continuously drying a traveling paper web in a papermaking machine wherein steam is supplied to the inner cavity of the drum and the shell of the drum has a plurality of circumferential grooves with axially extending rectangular collectors and tubes projecting tangentially from the collectors of resiliently deflectable material biased outwardly toward the shell of the drum with positioning lugs on the free ends of the tubes resting on the ribs to fix their position in the base of the grooves.