Abstract: A liquid cell culture medium collecting filter unit includes a porous metal membrane that filters out cells in a liquid cell culture medium, a support that holds a peripheral portion of the porous metal membrane. and a tubular member that has a hollow part serving a flow path for a liquid cell culture medium. The tubular member is connected to the support such that the flow path faces at least part of a main surface of the porous metal membrane.

Abstract: Provided is a sheet manufacturing apparatus capable of desirably adjusting the thickness of the sheet, and forming sheets with highly uniform thickness or grammage. A sheet manufacturing apparatus configured to make a sheet from defibrated material of defibrated paper includes: a drum unit having a cylinder with a defibrated material storage space inside and multiple openings through which the defibrated material passes formed in the outside of the cylinder; an accumulator configured to accumulate the defibrated material that past the openings, forming a deposit; and a housing configured to enclose the drum unit and the accumulator, the housing having a vent through which air passes between the drum unit and the accumulator.

Abstract: A hybrid fiber which includes: a metal wire having a roughened surface; and a fiber is provided. In the hybrid fiber, the metal wire and the fiber are combined.

Abstract: A method for producing a Yankee dryer cylinder, or Yankee cylinder, comprises the steps of disposing of a first and of at least a second cylindrical portion of shell. These are made of steel, have the same diameter and are provided with a plurality of grooves at an internal surface. In particular, the portions of shell, at a respective end, are provided of respective flange portions. The method provides to coaxially position the portions of shell up to arrange respective coupling surfaces of the flange portions adjacent one to the other. Then the engagement of the portions of shell is provided by means of a plurality of clamping members, each of which arranged to clamp the adjacent flange portions. Then, it is provided the circumferential welding of the cylindrical portion of the shell that are opposite to the flange portions, and the removal of the clamping members and of the flange portions.

Abstract: A filtering member is provided including a frame defining a fluid path between an outer face of the frame and an inner face thereof, the fluid path includes a first and a second protruding portions extending between the outer face and the inner face defining a filtering volume therebetween, at least one of the first and a second protruding portions is tapered such that a cross section of the filtering volume increases towards the inlet face; a filtering media disposed in the filtering volume and configured such that when fluid flows from the outer face towards the inner face density of the filtering media is higher than density thereof when fluid flows from the inner face towards the outer face.

Abstract: A roll for use in a papermaking machine has a circumferential surface formed of a polymeric material including a plurality of chemically reactive elastomer nano-particles and a resin. The polymeric material has a glassy transition temperature that is substantially the same as a glassy transition temperature of the resin alone.

Abstract: A roll for use in a papermaking machine has a circumferential surface formed of a polymeric material including a plurality of chemically reactive elastomer nano-particles and a resin. The polymeric material has a glassy transition temperature that is substantially the same as a glassy transition temperature of the resin alone.

Abstract: The steel-made Yankee cylinder includes a cylindrical shell (11) joined to two ends (13, 15), to which are fixed respective-support journals (3). The cylindrical shell (11) is joined to the ends through a circumferential weld formed between opposing surfaces of each end and of the cylindrical shell.

Abstract: A roll coating is manufactured having fiber and polyurethane made from aromatic isocyanate. The roll coating incorporates fiber having improved strength during the manufacturing stage, and so does not crack, as a result of which the coating can be s manufactured in a simple, efficient and inexpensive manner. A roll of a fiber web machine has a roll body having a coating of fiber and polyurethane that is made from aromatic isocyanate, on the roll body.

Abstract: The Yankee cylinder (1) for drying webs of cellulose material comprises a cylindrical shell (3) with a substantially cylindrical outer surface, whereto end heads (5) are fixed by welding; the shell and the heads define a hollow inside volume of the cylinder and the heads have respective support journals (7). An insulation (17) of the end heads is further provided.

Abstract: The Yankee cylinder (1) for drying webs of cellulose material comprises a cylindrical shell (3) with a substantially cylindrical outer surface, whereto end heads (5) are fixed by welding; the shell and the heads define a hollow inside volume of the cylinder and the heads have respective support journals (7). An insulation (17) of the end heads is further provided.

Abstract: The steel-made Yankee cylinder includes a cylindrical shell (11) joined to two ends (13, 15), to which are fixed respective-support journals (3). The cylindrical shell (11) is joined to the ends through a circumferential weld formed between opposing surfaces of each end and of the cylindrical shell.

Abstract: An apparatus for producing a fibrous web, in particular a tissue web, with a press zone through which the fibrous web is passed in a lying position between a circulating permeable structured belt and a circulating permeable non-structured supporting belt. A press nip is provided on a Yankee Cylinder through which the fibrous web is passed in the lying position together with the structured belt between the structured belt and the Yankee cylinder, whereby the press zone is limited on the side adjacent the supporting belt by a substantially smooth surface, and whereby the supporting belt is not brought together with the fibrous web and the structured belt until proximate to the press zone.

Abstract: The present invention provides methods and apparatus to encode substrates (e.g., paper, synthetics, etc.) with information. In one implementation a method is provided including: receiving data that corresponds to a two-dimensional signal that encodes plural bits of data; receiving data that corresponds to a frequency-domain signal, the data corresponding to a representation in a spatial domain through inverse transforming the frequency-domain signal; and defining characteristics for an element of a substrate-making process, the characteristics including at least a pattern representing the spatial domain representation and the two-dimensional signal.

Abstract: The interchangeable sleeve comprises: a substantially cylindrical outer surface (105A); a layer of hardened resin (R); a substantially conical inner surface for connection to a conical central core of the roller. The inner surface is formed at least partially of at least one inner component (102) having greater rigidity than said hardened resin. The inner component is constrained to the sleeve by means of said hardened resin.

Abstract: An apparatus for dewatering a fiber web in a paper machine includes a heated drying surface, a permeable fabric carrying the fiber web, and a condensing region adjacent a portion of the permeable fabric on a side opposite the fiber web. The fiber web is interposed between and contacts each of the heated drying surface and the permeable fabric. The condensation region has: a) a temperature which is less than a temperature of the permeable fabric; and/or b) a pressure which is greater than an ambient pressure.

Abstract: A cylindrical rotating thickening device including an axial core, a plurality of longitudinally extending spaced apart support ribs extending radially from the axial core, and a shell surrounding the support ribs and supported thereon. The shell includes a plurality of longitudinally extending spaced apart grooves, and a perforated deck surrounding and supported on the shell. The deck includes a plurality of closely adjacent deck segments, and each deck segment includes a leading edge and a trailing edge. Each deck segment further includes an integral bar attached to the leading edge and received in the shell groove, and a plurality of fasteners for securing the bar to the shell.

Abstract: A liquid filtering apparatus for mounting in a housing and positioned to filter liquid flowing from an inlet (23) to a drain. A rotatable wheel is disposed within and coupled to a rotating screen so that rotation of the wheel causes rotation of the screen. The wheel includes vanes (5–12) extending towards the screen dividing the space within the screen into sections substantially isolated from each other except via the drain. A stationary baffle (13) arranged adjacent a portion of the screen prevents liquid from flowing into the wheel through that screen portion. The baffle is positioned such that water flows more readily into sections of the wheel on one side of a vertical plane through the rotation axis than the other sections. Thus, the wheel is unbalanced by water retained in sections of the wheel and rotation of the wheel results.

Abstract: A diagonally joined cylindrical fabric in the form of a cylindrical endless fabric is obtained by shifting ends of facing wefts of a non-endless fabric leftward or rightward and joining together the ends of the wefts to thereby form a joining portion inclined relative to an axis of a cylinder. The cylindrical fabric comprises a weave pattern in which warp passes over continuous two or more wefts, then passes under a less number of wefts, the joining portion at ends of the fabric formed into an endless cylindrical shape is inclined relative to the axis at 25° to 5°. The surface of the cylindrical fabric is formed with crimps that are longer in a face length direction than in a circumferential direction.

Abstract: A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising a drainage means comprising a cylinder mould and a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through the fiber suspension forming on the cylinder mould so as to improve sheet formation. A baffle is provided in the discharge portion of the former to prevent stock build-up therein.

Abstract: A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising a drainage means comprising a cylinder mould and a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through the fiber suspension forming on the cylinder mould so as to improve sheet formation. A baffle is provided in the discharge portion of the former to prevent stock build-up therein.

Abstract: Arrangement 1 for washing and dewatering a fiber pulp suspension, which arrangement comprises two hollow, circular-cylindrical screen members 2a, 2b delimited by envelope surface and end walls. The screen members rotate towards each other to form a nip 10, at least one of the said screen members 2a, 2b being arranged in a vat 6 which partially encloses the envelope of the screen member and which, in the direction of rotation of the screen member, converges towards the envelope of the screen member. The invention relates to a sealing arrangement 8 at the end wall of the screen member. By retracting the seal a distance X from the envelope surface of the screen member in a limited area &agr; near the nip 10, the seal is relieved of the very high hydraulic and mechanical pressures which occur in the nip. Wear between the end wall of the drum and the seal at the press nip is reduced. A simple pressurized seal can thus be used with the same low pressure applied along the entire circumference.

Abstract: A method and an apparatus for continuously drawing superheated vapor through a moist web as the same is being formed and pressed at a porous peripheral surface of a rotatable hollow cylinder, thereby allowing to have web drying in a compact apparatus permitting recycling of heat. The extracted moisture is transformed in superheated vapor and again used in the drying of incoming web.

Abstract: Drying end of a machine for the production of a material web such as paper or cardboard. The drying end includes at least one impact flow drier configured to bombard at least one surface of the material web with hot air or hot steam impact flow. Also provided is a method for drying a material web including bombarding the material web on at least one surface with hot air or hot steam impact flow, via at least one impact flow drier.

Abstract: A dandy pan for use with a dandy roll in the manufacturing of paper material. The construction of the dandy pan provides for reduced cracking in the surface of the dandy pan. The dandy pan includes a base portion and a top portion attached to the base portion to define an area through which steam is circulated to heat the dandy pan. A plurality of ribs are disposed in the base portion within the area. Each of the plurality of ribs is secured to the top portion by at least one weld. A spacing of the ribs of equal to or less than approximately nine inches reduces stresses on the top portion of the dandy pan. In a preferred embodiment, the ribs are spaced approximately eight inches apart.

Abstract: In the present invention, in a process in which a fiber suspension supplied in a flat layer manner is subjected to natural dehydration, pressure dehydration, or suction dehydration, while circulating a cylindrical suction cylinder, and thereby, dehydration slowly proceeds and a paper web is formed, and this paper web is moved to an endless felt by means of a suction couch roll to produce paper, a tapered suction roll sleeve 6, the outer peripheral surface of which is cylindrical and the inner peripheral surface of which has an inclination identical to that of the outer circumference of the tapered suction roll cell 5 is attached and detached, and thereby, it becomes easy to conduct the attachment and detachment of various types of wires wound on tapered suction roll sleeve 6.

Abstract: Apparatus and method for forming a continuous web on a forming fabric includes providing a pressurized chamber, processing the forming fabric through the pressurized chamber, and distributing a pressurized flow of a slurry having a first composition in the pressurized chamber across the width of the forming fabric to form the continuous web.

Abstract: Suction box for a machine producing a web containing cellulose fibers, said suction box being placed inside a rotating suction roll (2) provided with a perforated jacket (1), said suction box (3) comprising a suction chamber (4) having a suction inlet (6) placed against the interior surface (5) of the suction roll and a suction connection (7) for creating a negative pressure in the suction chamber and sucking water through the perforations (8) in the suction roll into the suction chamber. The suction inlet (6) is provided with ribs (10) laid in a direction transverse to the direction of rotation (9) of the suction roll (2) and forming suction slits (11) in the longitudinal direction of the suction roll near the interior surface (5) of the suction roll.

Abstract: A papermaking screen of the invention is formed of first and second annular supporting members having a plurality of first and second recesses, and space holding members fixed to the first and second annular supporting members to establish a predetermined distance therebetween. In the invention, one or more elongated member groups having a plurality of elongated members are disposed between the first and second annular supporting members. The elongated members are disposed in the recesses and arranged parallel to each other to form a space between two elongated members situated adjacent to each other. Also, one or more intermediate supporting members may be situated between the first and second annular supporting members. The elongated member group may be situated between the first and second annular supporting members, between the intermediate supporting members, and between the intermediate supporting member and the first or second annular supporting member.

Abstract: The invention is directed to a paper machine for making or processing a paper web. The paper machine includes a roll for carrying the paper web; and a hydraulic cylinder assembly connected to the roll for moving the roll. The hydraulic cylinder assembly includes a cylinder defining a chamber, a piston disposed within the cylinder, and a piston rod connected to the piston and extending from the cylinder. The hydraulic cylinder assembly further includes a bushing connected to the cylinder and disposed around the piston rod. The bushing slidably engages the piston rod and substantially seals the cylinder chamber from the ambient environment. The bushing is formed from a non-metallic material having a tensile strength of between approximately 6500 and 12500 psi at a temperature of approximately 73.degree. F., a coefficient of friction of between approximately 0.10 and 0.30, and a maximum continuous operating temperature of approximately 550.degree. F.

Abstract: A drum having a longitudinal axis, and an outer periphery, has a multiplicity of longitudinal, drainage grooves formed therein, and a cylindrical sheath encloses the drum, the sheath having a multiplicity of holes formed therein. The drum is imperforate. A pair of the drums is employed in a twin-roll press as press rolls, and one thereof is used in a single roll press with a compaction baffle. In one embodiment, the press roll has its grooves formed in a herringbone pattern, the same pointed in the direction of rotation, to enhance drainage. In another embodiment, the longitudinal drainage grooves have increasing depth, toward a mid-length of the press roll where they open into inner-drum drainage conduits which discharge the filtrate adjacent the rotary axis of the press roll.

Abstract: In prior pressure washer drums, the filter deck was supported on the central shaft by spokes welded to the central hub which was in turn welded to the shaft. The extreme forces caused premature failure of the welded joints. The present invention provides a pressure washer drum in which sandwiched parallel plates having an array of apertures replace the spokes and central pipe and journals are supported on the hub by a bolting system rather than by welding.

Abstract: An anti rewet deck is provided for press rolls used to increase consistency of fibrous pulp slurry from approximately 4 percent up to about 30 to 50 percent. This is accomplished by biasing the location of the drainage holes in the roll shell to the forward edge of the drainage compartments within the roll shell. To avoid the necessity for handing of the rolls, a mechanism is provided for accomplishing the purposes of minimizing rewet at practical production rates by providing baffle plates which effectively orient the draining pattern in the desired direction. Such baffles can be permanently or removably installed once the desired handing of the rolls is determined.

Abstract: A suction roll for a paper machine in which a stationary suction shoe is arranged inside a revolving mantle loop and is connected to a source of negative pressure. The mantle loop is a substantially water-receiving and permeable fabric-sock loop that receives water and is, in a preferred embodiment, supported by means of guide members arranged inside the loop. The suction shoe is provided with a permeable guide deck against which the inner face of the fabric-sock loop glides.

Abstract: The invention relates to a Yankee cylinder for a paper-making machine, in which a coating which is a mixture of a metal powder and a carbide or nitride and withstands well the wearing effect of the doctor blade and other corrosive and thermal stresses produced in paper-making is formed on top of the cylinder mantle. The invention also relates to methods for coating a Yankee cylinder with such a coating by using a detonation, plasma or supersonic method.

Abstract: Paper having an unique twill weave wiremark produced using a dandy roll in which the outer screen bears has a twill weave; the dandy roll and the papermaking process are also disclosed.

Abstract: This invention relates to a vacuum water drawing windlass for making paper and in particular to one mainly including a tubular member, a bushing fitted on each end of the tubular member, a controlling disc rigidly engaged with the other side of each bushing, a case fixedly engaged with each controlling disc, a shaft inserted into each end of the tubular member and two brackets for supporting the tubular member whereby the paper production may be increased and the quality of the paper may be improved.

Abstract: The invention relates to a roll (8) for the forming section of a paper machine or the like, comprising a perforated shell (17) for removing water from a fibre suspension through holes (18) in the shell (17) into the roll (8) and being arranged to be mounted rotatably in the machine. A wire (3; 10) or the like within the forming section is arranged to be in contact with the shell (17) of the roll (8) over a part of its periphery. For improving the dewatering and the formation, the roll (8) comprises, at least substantially over the peripheral portion in contact with the wire (3; 10), bladelike means (21; 33) extending in the longitudinal direction of the roll (8). The blades are positioned within the shell (17) close to the inner surface thereof and mounted in such a manner that the shell (17) moves relative to the blades when the roll (8) rotates.

Abstract: A vacuum filter for the separation of solids from liquids, comprising an endlessly circulating array of troughs which constitute a common horizontal filter surface, on which an endless filter cloth is laid, in which each trough has an elastic sealing strip on that rimless edge which extends along the trough bottom transversely to the direction of movement. A good vacuum seal between two successive troughs with easy replaceability of the sealing strip is provided wherein the sealing strip is releasably clamped by a spring-loaded movable clamping bracket against the leading and/or rear edge of one of the adjacent troughs.

Abstract: The sieve plate herein is formed of plate or sheet material into which relatively wide grooves, having a flat bottom 4 mm wide, are formed on one side to within 1 mm of the opposite side. Through this remaining membrane wall openings are formed having a width of about 1 mm. The small openings may either be spaced circular perforations or slots. The slots may be in zig-zag formation. Zig-zag formations are preferred because it maximizes the filtering area.

Abstract: A pulp dewatering apparatus is constructed of two press rolls arranged juxtaposed to define a nip region. At least one of the press rolls is constructed of a perforated metal outer shell surrounding a substantially rigid inner roll body. A layer of elastic material is disposed between the rigid roll body and the perforated metal shell to provide a resilient member. As a result of the elastic material, this press roll will deform during the dewatering operation to provide an extended nip region of about 3 to 5% of the overall press roll diameter.

Abstract: A method for forming a paper web by which web formation is improved and flocculation in the web is reduced includes the steps of feeding steam under pressure into the fiber suspension when the suspension enters into the gap of the former and as web formation is initiated over the perforated mantle of the forming roll. The steam is fed from a steam supply chamber or the like provided within the forming roll through the perforations in the roll mantle within a steam supply sector of the roll mantle. The steam feed is applied to the pulp web when the web is still substantially uncouched and in a manner such that when the steam condenses in the pulp suspension, an implosion is generated in the pulp suspension which produces high frequency mechanical vibrations which can be closely controlled to achieve the desired effects. A twin-wire former and forming roll therefor for applying the method are also disclosed.

Abstract: A rotary drum filter of the pipe machine type has a stationary vacuum breaker valve-discharge elbow assembly at the discharge end of the drum which defines a streamlined, smoothly curving, and substantially unobstructed discharge flow passage with gradually changing flow cross sectional areas. The valve member includes a valve closure segment at its inlet end that is structurally connected to the annular outlet end flange and sealing rim by an extension segment which forms a continuation of the valve segment. The cross sectional shapes and areas of the flow passage at the valve outlet and discharge elbow inlet are the same, but the area gradually increases in a direction toward the outlet of the elbow, and the shape gradually changes from a segmented circle to a full circle in the same direction.

Abstract: Roller for machines in the paper-making industry or similar, with a honeycomb-shaped roller element formed by upright straight and corrugated bands, extending approximately in the circumferential direction and alternating with each other in the axial direction, said bands being connected by welded joints. To make passages, which allow a throughflow in the circumferential direction, between the roller element and a fabric cover supported by the latter, openings adjoining the fabric cover are provided in the roller element between the fabric cover and the radially outer edges of the corrugated bands in the area of the connecting points and in the center between the connecting points, and in order to increase the open-passage area of the fabric cover, the latter rests directly on the roller element.

Abstract: A vacuum breaker valve-discharge elbow assembly for a rotary drum filter of the pipe machine type is adjustably mounted to the drive gear housing for the filter via a separate mounting plate. A valve flange is secured to the mounting plate. The mounting plate is in turn transversely and axially adjusted on the gear housing via adjusting bolts to accurately seat the valve within its valve housing in the drum. The discharge elbow is then secured to the mounting plate independently of the valve. The valve can be rotationally adjusted on the mounting plate without disturbing the prior axial and transverse adjustment of the plate and valve by providing slotted fastener access holes on the valve flange and close-tolerance valve flange guide shoulders on the mounting plate. Cooperative calibration plates on adjacent valve flange and mounting plate surfaces facilitate precise angular adjustment of the valve.

Abstract: A vacuum breaker valve-discharge elbow assembly for a rotary drum filter of the pipe machine type is adjustably mounted to the drive gear housing for the filter via a separate mounting plate. A valve flange comprising a separate clamping ring clamps the valve to the mounting plate. The mounting plate is in turn transversely and axially adjusted on the gear housing via adjusting bolts to accurately seat the valve within its valve housing in the drum. The discharge elbow is then secured to the mounting plate independently of the valve. The valve can be rotationally adjusted without limitation on the mounting plate without disturbing the prior axial and transverse adjustment of the plate and valve by loosening the clamping ring to enable rotation of the valve along close-tolerance guide surfaces of the mounting plate. Cooperative calibration plate and pointer on adjacent surfaces of the valve body and packing collar facilitate precise angular adjustment of the valve.

Abstract: The invention concerns variable contour rollers for use in calendering or pressing devices, printing presses and like applications. The rollers include an external element of cylindrical form, for example of cast iron, and in their interior a number of transverse elements which can be made to expand radially by heating. More or less substantial radial expansion provokes directly or indirectly a change in the profile of the exterior generally cylindrical working surface. The interior of the roller may be a shaft carrying heating elements and which is fixed or rotates with the external working surface.

Abstract: A strainer drum for straining pulp and the like comprises a substantially circular cylindrical mantle formed by a number of strainer elements provided with strainer openings, which strainer elements are held together between at least two gables to form the mantle.

Abstract: Paper forming roll comprising: a stationary pressure box; a rotatable foraminous shell extending around the box; paper making wire; spacing members extending between the box and shell, the spacing members being secured to the box; a plurality of circumferentially extending zones defined by the box, the shell, and the spacing members; wherein a first one zone is a forming zone, a second zone is a primary holding zone, a third zone is a transfer zone, and at least a fourth zone is a secondary holding zone; the box including a plurality of external and internal walls defining a plurality of pressure chambers, a first one of the external walls including ports providing communication between the forming zone and a first one of the pressure chambers from which vacuum for forming purposes may be achieved, a second one of the external walls extending generally vertically from one end of the first one of the external walls to partially define the primary holding zone, the generally vertical wall also including ports p

Abstract: A suction roll, for a paper-making machine having a hollow cylindrical roll shell with a cylindrical inner surface from which a suction box draws water, has members inserted into the roll shell openings. The insert members are apertured with radially-extending ducts for the suction of water to the roll shell inner surface. The insert members form a major portion of the shell inner surface and characterize that surface for relatively low-wear sealing with a suction box movable relative to the roll shell.