Abstract: A single tier drying section is disclosed for drying a web. The drying section includes a dryer and a felt guided about the dryer such that the web is disposed between the dryer and the felt for drying a first side of the web. A further dryer is disposed downstream relative to the dryer and a further felt is guided about the further dryer such that the web is disposed between the further dryer and the further felt for drying a second side of the web. A dryer transfer mechanism is used for transferring the web from the dryer to the further dryer.

Abstract: A quick-release post apparatus for a press comprises a pair of opposed, spaced post members with a pivoted link mounted in one post member and a pivoted swing arm mounted in the other post member. The link is movable between the opposed first and second post members. The swing arm includes a hook for engaging a rod in the link whereby the link compressively pre-loads the ends of the opposed first and second post members against a removable block, which is interposed between the opposed ends of the first and second post members. The post can thereby be quickly reconfigured between an open position permitting passage between the first and second post members when the block is removed, and a closed position when the block is in place between the post members where the post is a rigid, load-bearing member.

Abstract: A dryer apparatus is disclosed for drying a pressed web. The apparatus includes a plurality of single tier dryer sections in which successive sections dry alternate sides of the web, the web being transferred between successive sections without any open draw of the web such that the web is uniformly dried on both sides thereof while the web is restrained against cross-machine directional shrinkage. Each of the sections includes a single tier of dryers with an intermediate roll disposed between each adjacent dryer. A dryer felt extends in serpentine configuration around each dryer and roll such that the web is disposed between the felt and each dryer for drying one side of the web. The felt is also disposed between the roll and the web with the felt in direct contact with an alternate side of the web. The intermediate roll defines a plurality of circumferential grooves for diffusing boundary air following the felt that would otherwise tend to lift the web from the felt extending around the roll.

Abstract: A self-loading controlled deflection roll for forming a controlled pressure nip with another roll along a nip line with a hollow rotatable roll shell rotatable on an axis and a roll shaft extending through the shell and radially supporting the shell along the nip line with axially facing surfaces on the shaft and rollers rolling on said surfaces supported on the rotating roll shell accommodating bending of the roll shaft relative to the roll shell fixing their relative axial positions. One roller is axially fixed and the other roller is mounted on a rocker arm loaded with the piston and cylinder.

Abstract: A roller (10) used as support, backing or driven roller in winding devices, such as winders for winding wound rolls of paper coming from a papermaking machine, is composed of an outer cylindrical roller element (24), on which an elastic, flexible intermediate layer (26) of elastomeric material is applied. On the intermediate layer (26), an external roller mantle (33) of thin-wall spring steel is provided that can be deformed in a plane perpendicular to the axis due to the contact pressure of the roll (2) and can be pressed against the outer perimeter of the roll (2). A broad contact region is created, which leads to a lower specific nip pressure and to a lower roll hardness. Channels (27, 28) in the intermediate layer (26) serve to increase the flexibility and cooling.

Abstract: An improved hydrocyclone and method of operating for centrifugal cleaning of pulp for papermaking wherein the hydrocyclone has a plurality of inserts each with openings of different sizes for selectively and interchangeably inserting into a stock entry opening and into a vortex finding outlet opening to adjust capacity and cleaning efficiency. In one form the inserts each can be changed by tubes of different openings which are installed into the inserts changing the opening sizes. In another form, the inserts are threadedly engaged with bosses or are adhered or frictionally fit into the bosses.

Abstract: A method and apparatus for improved dewatering of a papermaking stock in a web forming section of a papermaking machine including directing a stock jet stream into the head end of a run between opposed looped forming wires traveling in a substantially parallel forming run passing over a curved vacuum forming box and thereafter passing over one or more pressure locations with a pressure dome on one side and a water collecting chamber at the other side of the wires with the pressure dome in one form divided into compartments each applying an increasing pressure to the wire and stock between the wires with the air pressure being heated such as by being delivered from the dryer section and the wires separated slightly following the pressure location with a last smaller pressure compartment transferring the web to one of the wires and the wire carrying the web thereafter turning over a couch roll and the other wire carried over a turning roll.

Abstract: An apparatus and method for cross-cutting a traveling web of material, such as paper, while winding the traveling web into successive rolls of a specified diameter includes a laser, a pair of spaced adhesive applicators and energy means for activating the adhesive to change it from an essentially inert to a web adhesive state. A pair of horizontally arrayed drums support a core on which the traveling web is wound. Upstream of the core, over the lower periphery of one of the drums, the on-coming web has its drum-supported surface exposed to a transversely moveable laser which cuts the web transversely to its direction of travel. Upstream of the transversely actuated laser are a pair of adhesive applicator nozzles which are spaced in the web traveling direction and movable transversely with the laser. An energy means is mounted between the adhesive nozzles and laser to activate the adhesive sprayed by the nozzles.

Abstract: A blanket is disclosed for an extended nip press. The blanket includes a woven base having a first plurality of filaments which are disposed in a machine direction. The first plurality of filaments have a modulus of elasticity which permits flexing of the blanket during movement of the blanket through the extended nip press. The base also includes a second plurality of filaments woven together with the first plurality of filaments and disposed in a cross-machine direction. The second plurality of filaments have a modulus of elasticity which is higher than the modulus of elasticity of the first plurality of filaments for inhibiting flexing of the blanket in a cross-machine direction. Thermo-setting resin is applied to the base such that the resin is reinforced by the base. The resin defines a plurality of vents for permitting the escape of water in the liquid and vapor phase away from the extended nip press during use thereof.

Abstract: A saveall apparatus is disclosed for collecting water ejected from stock through a forming wire of a papermaking machine. The apparatus includes a box which is disposed closely adjacent to the forming wire. The box defines an enclosure which is connected to a source of partial vacuum so that water ejected from the stock is collected within the enclosure. A throat wall is rigidly secured to the box and has an upstream and a downstream end. The upstream end of the throat wall slidingly engages the forming wire. A moveable throat wall cooperates with the throat wall for defining therebetween a vacuum slot which is connected to the enclosure such that the water ejected from the stock is drawn by the partial vacuum through the vacuum slot into the enclosure. The throat wall is disposed in a first plane, and the moveable throat wall is disposed in a second plane such that when the moveable throat wall is moved relative to the throat wall, an angle defined between the planes remains constant.

Abstract: A twin wire forming apparatus for forming a web from stock having an ash content above 20% has upstream end disposed closely adjacent to a headbox. A curved shoe cooperates with a second wire and is immediately downstream relative to the upstream end of the forming section. The second wire is between a first wire and the shoe, so that a first portion of water is removed through the first wire when the wires and the stock move over the shoe. A dewatering device is between the shoe and the downstream end of the forming section and cooperates with the first wire and is on the opposite side of the wires relative to the shoe. The dewatering device has a curvature which is less than, and opposite to that of the curved shoe. A second portion of water is removed from the stock through the second wire during movement of the stock and the wires over the dewatering device.

Abstract: A short dwell coater apparatus is disclosed for applying coating material onto a web guided by a backing roll. The apparatus includes a coater housing which is disposed in close proximity to the backing roll. The arrangement is such that the web guided by the backing roll moves between the backing roll and the housing. The housing defines an application chamber which is open towards the web and which extends along the web in a cross-machine direction. The application chamber is connected to a source of coating material such that the coating material is applied to the web during movement of the web past the chamber. The coater housing has an upstream lip which is disposed upstream relative to the chamber and adjacent to the web. The lip defines an upstream coating overflow for permitting excess coating material to flow therethrough. A flexible coater metering blade is disposed downstream relative to the chamber.

Abstract: A headbox apparatus is disclosed for ejecting stock onto a forming wire for forming a web. The apparatus includes a housing which is connected to a pressurized source of the stock. The housing defines a tapered inlet for the flow therethrough of the stock. The tube bank has an upstream and a downstream end with the upstream end being connected to the tapered inlet such that the stock flows at a substantially constant flow rate through the inlet and through the upstream end of the tube bank to the downstream end of the tube bank. The tube bank includes a plurality of tubes for the flow therethrough of the stock. A member defines a slice chamber which has an upstream and a downstream extremity. The upstream extremity is connected to the downstream end of the tube bank, and the downstream extremity is disposed adjacent to the forming wire.

Abstract: A self-loading type of controlled deflection roll includes, in a preferred embodiment, a pivot assembly which is pivotally mounted to a support shaft near either end of the roll. The roll includes a roll shell having an extension attached to either end which extends co-axially outwardly from the roll shell. These axial extensions of the roll shell are supported by non-self-aligned bearings on the pivot assemblies near either end of the roll. Intermediate the end of the roll shell and the bearings is a heat barrier which prevents hot hydraulic fluid within the interior of the roll from contacting or heating the bearings which rotatably support the roll shell about the self-loading assembly. The bearings can, therefore, be provided with a lubricant which is sealed and shielded from the temperature of the hydraulic fluid within the roll.

Abstract: A short dwell coater apparatus is disclosed for the application of coating material to a web which is supported by a backing member. The apparatus includes a housing which is disposed closely adjacent to the backing member such that the web moves between the housing and the backing member. The housing defines an application zone which is connected to a pressurized source of the coating material. The application zone has an open face towards the web. A blade is adjustably secured to the housing and extends from the housing towards the web. The blade defines a downstream extremity of the application zone. A movable flow divider supported by the housing extends into the application zone. The divider has an upstream and a downstream end, with the downstream end being movably disposed in the vicinity of the blade for reducing the size of a flow vortex generated within the application zone due to movement of the web past the open face.

Abstract: A headbox tube bank apparatus and method of directing flow through same is disclosed for permitting the flow therethrough of stock in a papermaking machine. The apparatus includes a tube bank frame for rigidly supporting the tube bank, the frame defining a plurality of openings. A plurality of tubes cooperate with the frame such that each tube extends through and is supported by an opening. Each tube has an upstream and a downstream portion, the upstream portion defining an internal cross-machine direction section of substantially circular configuration for maximizing the velocity of the stock through the tube.

Abstract: A discharge apparatus for use in bins or hoppers in which a pluraity of rolls are disposed in a lower portion of the bin, and are so arranged to inhibit gravitational flow of material between the spaces defined by adjacent rolls. The rolls include knobs, plates, or the like extending outwardly therefrom, and the rolls may be arranged in a single row, or in multiple rows. When the rolls are rotated, material above the rolls is permitted to flow between the rolls and out of the bin or hopper. The rolls may be horizontal, or inclined, and may be variously shaped, including cylindrical, conical, or other geometrically complimentary shapes.

Abstract: An apparatus is disclosed for drying a web of paper emerging from a press section of a papermaking machine. The apparatus incudes a first dryer section means for initiating the drying of the first side of the web. A first transfer arrangement transfers the web from the press section to the first dryer section. A second dryer section is disposed downstream relative to the first dryer section for initiating the drying of a second side of the web, the second side of the web being opposite to the first side thereof. A first dryer transfer arrangement transfer the web without open draw between the first and second dryer sections. The first dryer transfer arrangement permits both threading of the web without the assistance of threading ropes and the drying of both sides of the web.

Abstract: A wide area type of wet press for dewatering an endless traveling web, such as paper, wherein a shoe having a curved face is applied to a traveling belt which travels through a high pressure zone between the shoe and a rotating backing roll. The nip line of the most intense nip pressure along the length of contact of the shoe over the backing roll is selectively located, as desired, by pivotally supporting the shoe about two, parallel, longitudinally extending axes which, in turn, are supported on separately controlled hydraulic pistons. The pressure profile of the nip pressure over the face of the shoe can also be altered by controlling the hydraulic pressure in the support pistons.