Fluid Patents (Class 209/250)
  • Patent number: 5800578
    Abstract: A separating system for separating material transported by air utilizing apparatus having a tangential inlet for a stream of air and entrained material, a bottom material exit, a boundary wall air exit and a central interior air exit. Each air exit includes a perforated wall or screen through which air is removed or separated from the entrained material. Enhanced separating action is achieved through coupling two such separators in a loop arrangement such that the material discharge from a first separator is conveyed via a relay stream of air to serve as the input to a second separator, while the entire air exhaust from the second separator is returned as one of a plurality of inlet streams to the first separator. A further advantage is realized by partitioning the air exhaust of the first separator into a plurality of parallel passageways which can be individually closed.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: September 1, 1998
    Assignee: Air Conveying Corporation
    Inventor: Richard D. Johnson
  • Patent number: 5735403
    Abstract: A particle separator for use in a material flow system having an airflow generator to generate a flow of air to provide supply material having coarse and fine particulate material to the particle separator. The particle separator includes a housing having a top portion and a bottom portion and a longitudinal axis extending from a center of the top portion to a center of the bottom portion and a chamber defined within the housing. An inlet disposed towards the top portion of the housing is in communication with the flow of air and the supply material and is in further communication with the chamber. It is adapted to direct the flow of air and the supply material into the chamber. The chamber is adapted to facilitate swirling of the airflow and the supply material within the chamber. A cone-shaped air rotation circulator is in communication with the chamber and is configured to facilitate the flow of air directed into the chamber in a circular motion within the chamber.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: April 7, 1998
    Inventor: Michael L. Stiglianese
  • Patent number: 5667080
    Abstract: A hand-held jeweler's vacuum comprises an elongated vacuum member with an opening at one end, motor drive means located at the other end and an aperture in the bottom of the elongated member. A detachable box member is mounted beneath the aperture to receive stones and metal pieces. Internally, a mesh filter and a vacuum filter are positioned in the intake path at approximately a 45 degree angle to the air flow and a pre-determined distance apart. In operation, the vacuum picks up metal and stones which are stopped by the mesh filter and the vacuum filter from proceeding through the vacuum filter and the stones and metals fall into the box. The stones and metals can the be removed while other particles are collected in the storage space beyond the filters. The invention permits the salvage of small stones and precious metals which otherwise would be lost during the manufacturing process.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: September 16, 1997
    Inventor: Stanley Klein
  • Patent number: 5645724
    Abstract: A cylindrical screen within which rotates a rotor fitted with means causing pressure variations and/or turbulence. The rotor (1) consists of one or several cylindrical surface segments (2) which when geometrically developed are right triangles of which the two perpendicular sides (3, 4) resp. correspond to the cylinder base (3) and to the height (4) and of which the oblique side (5) constitutes the hypothenuse.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 8, 1997
    Assignee: E & M Lamort
    Inventor: Jean Pierre Lamort
  • Patent number: 5624558
    Abstract: The differences in performance of a screening cylinder during screening of a fiber suspension (e.g. low consistency paper pulp) at the inlet end compared to the reject end is accommodated by constructing the feed side surface of the screening cylinder so that it induces greater turbulence in the vicinity of the screen cylinder surface adjacent the reject end of the screen than adjacent the inlet end. Typically this increase in turbulence is at least about 10% (preferably at least about 40%, and typically greater than 100%). The turbulence increase can be provided by a substantially smooth screening medium surface at the inlet end and a contoured screening medium surface adjacent the reject end, or by first and second contoured surfaces of different aggressiveness.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: April 29, 1997
    Assignee: CAE ScreenPlates Inc.
    Inventors: Frank Aaltonen, Frey Frejborg
  • Patent number: 5614094
    Abstract: A vibrating screen unit for dewatering dredged material. The vibrating screen unit includes a frame and a top screen deck, a middle screen deck and a bottom screen deck. The middle screen deck includes a splitter which extends across the width of the frame and comprises alternating closed channels and screen rows which alternate across the width of the frame.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: March 25, 1997
    Assignee: Deister Machine Co., Inc.
    Inventors: E. Mark Deister, Dale A. Loshe
  • Patent number: 5607589
    Abstract: A screen cylinder or plate has a screening surface and accepts surface on opposite faces, and screens pulp flowing in a flow direction to separate accepts from rejects. A number of substantially parallel macro grooves are formed in the screening surface generally transverse to the flow direction, and a number of parallel micro grooves are formed in the screening surface within each macro groove also generally transverse to the flow direction. The macro grooves induce shear stress in the reject material flowing in the flow direction to keep it in constant motion and to prevent it from forming a mat on the screening surface. The micro grooves induce micro turbulence into the pulp at the immediate area of screening openings extending from each micro groove to the accepts surface, to fluidize the pulp so that accepts readily pass through the screening openings toward the accepts surface. Each micro groove within a macro groove is located further away from the accepts surface moving in the flow direction.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 4, 1997
    Assignee: CAE ScreenPlates Inc.
    Inventor: Frey A. Frejborg
  • Patent number: 5593582
    Abstract: A shale shaker having two feeds, two screens, two mud outlets and a removable tray between the screens is disclosed. Each screen receives one feed and produces one outlet of cuttings and another outlet for separated mud for either bypass or direct feed to the mud tank or the other screen. The removable tray or trays facilitate the two screens acting in cascade. Valves are provided to control the overall flow rate to the shaker and to the lower level screen.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: January 14, 1997
    Inventor: John W. Roff, Jr.
  • Patent number: 5453193
    Abstract: An improved strainer device has a screen which receives a solid/mixture from a feed container for separation. To insure that an uneven flow of the mixture over the screen does not occur due to, for example, a non-level mounting, inlet rushing or turbulence, a weir structure is provided which raises the water mixture level above the screen by a predetermined height.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: September 26, 1995
    Assignee: Thermo Fibertek Inc.
    Inventors: Colin Maher, Timothy Sullivan, Salvatore Panarello
  • Patent number: 5431287
    Abstract: A vibratory screen separator system having a moving manifold, angled feed nozzles, and angled spray nozzles. The spray nozzles and the feed nozzles are attached to the bottom of the manifold, and the manifold moves back and forth over the screen. The feed nozzles evenly distribute the material to be separated across the screen. The spray nozzles clean the screen before each pass by the feed nozzles.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: July 11, 1995
    Assignee: Sweco, Inc.
    Inventor: Pete D. Knox
  • Patent number: 5429247
    Abstract: Method and apparatus for screening peat moss material. The method comprises the steps of forming an aqueous slurry of peat moss material and flowing the slurry on a screen to separate fines from coarser particles in the slurry. A spray of relatively large water drops is directed at the slurry to agitate the coarser particles blocked by the screen in order to dislodge fines adhering thereto, whereby the fines freed from the coarser particles are allowed to egress the slurry through the screen. The water spray also has the effect of clearing the screen of fines which clog the screen openings. The invention also comprehends a method and apparatus for screening peat moss material, comprising the steps of flowing an aqueous slurry of peat moss material on a sieve to extract from the slurry excessively large particles, and washing the rejects remaining on the sieve to dislodge therefrom smaller particles of acceptable size which are returned to the slurry.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: July 4, 1995
    Assignee: Johnson & Johnson Inc.
    Inventors: Martin Lemay, Serge Cadieux, Jacques Audet, Martin Roy, John Dery
  • Patent number: 5296098
    Abstract: A fibre suspension is separated by a filter device having a hollow filter body (1) with a wall (2) of filter material, and a container (3). The entire fibre suspension to be separated is sprayed in the form of at least one liquid jet onto said wall (2) to force a fine fraction of the suspension containing most of said undesired particles through said wall of filter material into the hollow filter body, thereby leaving a created coarse fraction of the fibre suspension mainly containing fibres in the container outside the filter body. Relative displacement between the liquid jet and the filter material is provided. Said created coarse fraction is dewatered through the wall of filter material, and said dewatered coarse fraction is discharged from the container.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: March 22, 1994
    Assignee: Celleco Hedemora AB
    Inventor: Roland Fjallstrom
  • Patent number: 5201423
    Abstract: The invention concerns a sorter with at least two screen baskets in a housing unit. The invention is characterized in that with screen basket diameters of at least 600 mm the at least two screen baskets are contained side by side, spaced, in an arrangement such that their longitudinal center axes extend parallel to each other and their end sides or end surfaces are contained each in identical planes extending perpendicularly to the longitudinal center axes of the screen baskets.
    Type: Grant
    Filed: November 20, 1991
    Date of Patent: April 13, 1993
    Assignee: J. M. Voith GmbH
    Inventors: Reimund Rienecker, Peter Schweiss, Theodor Bahr
  • Patent number: 5186332
    Abstract: Screening apparatus for paper making stock comprises a generally cylindrical vertical housing having the interior thereof separated by a cylindrical perforated screening member into a screening chamber and an annular accepts chamber on the inner and outer sides of the screening cylinder respectively. The feed stock enters an inlet chamber below the screening chamber tangentially, and special provision is made for preventing heavy reject particles from circulating around the bottom of the inlet chamber. For this purpose, the inlet chamber is provided at a position spaced circumferentially downstream from the inlet port, with an outlet port into which high specific gravity particles are carried by centrifugal force along with the carrying liquid. A conduit leads from this outlet port back to the inlet chamber in order to maintain a continuous flow through this conduit.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: February 16, 1993
    Assignee: The Black Clawson Company
    Inventors: Derald R. Hatton, Joseph P. Constiner, David E. Suica
  • Patent number: 5152891
    Abstract: A backwash strainer including a body, a strainer element having an inlet side contained in the body, and a space defined between the body and the strainer element. The body includes an inlet to the strainer element and an outlet from the annular space. A nozzle for directing cleaning fluid against the inlet side of the strainer element for dislodging particulate matter from the inlet side of the strainer element mounts to the body. A backwash arm for collecting the cleaning fluid and dislodging particulate matter mounts to the body. The backwash arm is positioned adjacent to and is in close proximity to the inlet side of the strainer element and the nozzle. The backwash arm has an axially extending slot defined by two spaced members having ends positioned adjacent to the nozzle. The backwash arm and the nozzle together may be moveable about a central axis relative to the strainer element.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: October 6, 1992
    Assignee: T/M Industrial Supply, Inc.
    Inventors: Robert J. Netkowicz, Carl A. Steiner, Michael S. O'Connell
  • Patent number: 5124029
    Abstract: A device for fractionating pulp suspensions has a series of vertical filter sheets attached to a horizontal shaft. Suspension is sprayed against the sheets to effect a separation of coarse and fine solids. Cleansing liquid is also sprayed against the sheets to keep the filter holes open and the fabric sheets are movable with respect to the sprays.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: June 23, 1992
    Assignee: Celleco AB
    Inventors: Roland Fjallstrom, Rune Frykhult
  • Patent number: 5119953
    Abstract: An improved apparatus and process for fractionating pulp suspensions consists of multiple interchangeable modular treating compartments stacked atop one another. Pulp suspension is fractionated in the first compartment, and one of the two resulting fractions flows gravitationally to a second compartment where it is fractionated further. Any of the resulting fractions may be fractionated still further in subsequent compartments as many times as desired. The treating compartments are interchangeable, so removal, addition, or replacement of compartments is relatively easy and quick. Fractionation in each compartment is carried out through centrifugal force.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: June 9, 1992
    Assignee: Celleco Hedemora AB
    Inventors: Charles A. Atkeison, III, Roland O. A. Fjallstrom
  • Patent number: 5110457
    Abstract: A method and apparatus for preparing an ore sample and recovering water from a drilling rig is disclosed. Ore sample and water recovery apparatus (10) includes a slurry inlet (12) for receiving slurry from a drilling rig. Slurry is directed from slurry inlet (12) to a diffuser chamer (13) which includes an abrasion-resistant, rubbercoated diffuser (14) and a slurry converger (16). Slurry is then directed through a first vibrating sieve screen (21) which separates large particles from the slurry and directs them directly into sample tank (58). The slurry is passed on to a second vibrating sieve screen (22) which screens out progressively smaller sized particles and directs them into sample tank (58). The reminaing slurry is directed into a slurry basin (26) and infused into a hydraulic carrier medium of water using jet pump infuser (34). The slurry is then directed into cyclone separator (48) which extracts the remaining particles from the slurry and directs them into sample tank (58).
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: May 5, 1992
    Inventors: Randy Krawl, Matt Stramel
  • Patent number: 5045181
    Abstract: An apparatus is disclosed for removing ash from repulped wastepaper which contains ash together with cellulosic fibers. The apparatus includes a frame and a plurality of rolls which are rotatably secured to the frame, such that the axes of rotation of the rolls are spaced and parallel to each other. The plurality of rolls include an upstream roll and a downstream roll having a cylindrical outer surface. A porous belt is supported by and extends around the plurality of rolls to define an endless loop. The belt moves between the upstream and downstream rolls for defining a screening portion. A headbox is disposed within the endless loop, and adjacent to the screening portion for ejecting the repulped wastepaper through the screening portion. A drainage device is disposed on the opposite side of the screening portion relative to the headbox for receiving ash passing through the screening portion.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: September 3, 1991
    Assignee: Beloit Corporation
    Inventor: Merle W. North
  • Patent number: 5019248
    Abstract: An apparatus for separating different phases of dry material, such as plant fibers, from each other includes a rotating hollow body on an inclined axis with an inner perforated wall, an outer perforated wall, and partitions at spaced intervals within the body to define compartments. The compartments are connected by central openings in the partitions, and each compartment is provided with longitudinally extending baffles. The outer perforated wall is divided into longitudinal sections by a gap. The material is fed into an upper input end and the different phases are separated as it moves within the downwardly inclined body toward an outlet end. The separated phases are carried away by conveyors.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: May 28, 1991
    Assignee: Ankal Pty Limited
    Inventor: Andrew F. Kaldor
  • Patent number: 5000323
    Abstract: Moving cigarettes are inspected, particularly in the passages (10, 30) between the vanes (12, 32) in a cigarette packing machine hopper, by an optical ends inspector (74, 76) which is switched by a position detector (84, 86) responding to passage of individual cigarettes. Faulty cigarettes are arrested by a suction aperture (26) or an arrestor are (122, 222) and subsequently rejected from the passage, either in an axial direction or sideways through an opening (116, 244) in the vane. The position detector (84, 86) may activate the suction or arm for arresting the faulty cigarette.
    Type: Grant
    Filed: November 14, 1989
    Date of Patent: March 19, 1991
    Assignee: Molins PLC
    Inventors: Michael J. Cahill, John Dawson, Julian W. Gardner
  • Patent number: 4997578
    Abstract: An apparatus for dewatering and squeezing a water containing material comprises a drum with a sieve mantle defining two co-operating drum sections, each comprising a feed screw extending therein. The first section of the drum in the feed direction is formed for dewatering of the material mainly by self-drainage. The first drum section is rotatable and is provided with means for cleaning the sieve mantle holes. The second section is formed for increased compression of the material, and has a thread height for the feed screw smaller at the outlet of the second section than at the inlet to this section.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: March 5, 1991
    Assignee: Hedemora AB
    Inventor: Torsten L. Berggren
  • Patent number: 4995966
    Abstract: A sifter-screening machine for loose material, especially flour, including an inlet for the material, downstream thereof a screen through which the material can be conveyed via an air stream, and downstream thereof an outlet for screened material. Disposed in the conveying route of the material, downstream of the screen, is a zone of reduced static pressure followed in the conveying direction by a conveying zone having an increasing cross-sectional configuration. The weight of the material just upstream of the outlet is at least nearly equal to the oppositely directed pressure of compressed air below an air-permeable element for supplying the material to the outlet.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: February 26, 1991
    Assignee: Firma IBV
    Inventor: Maximilian Ofner
  • Patent number: 4940535
    Abstract: A solids flow distribution apparatus is disclosed for use with two or more solid separation devices, such as shale shakers. The appartatus includes a plenum in communication with a source of flow of solids and liquid, such as from a drilling rig's mud system. The plenum includes lower outlets positioned adjacent inlet zones for each solid separation device. Valves are positioned across the lower outlets for regulating the quantity of solids and liquids that flow into the inlet zones of each solid separation device. A variable distribution apparatus is included within the plenum adjacent the flow inlet for regulating the proportion of solids directed towards each solid separation device.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: July 10, 1990
    Assignee: Amoco Corporation
    Inventors: William F. Fisher, Grant A. Young
  • Patent number: 4927529
    Abstract: A method of and apparatus for separating knots from a fibre suspension in the wood processing industry. A known problem in the prior art has been the quick wear of the screen surface of the knotter when the screen surface has been profiled. On the other hand the ability to separate with an unprofiled screen has not been satisfactory. When using a profiled screen cylinder (5), it has been noticed in performed tests that it is preferable to feed the pulp from the connections (2) in the direction of rotation of the screen cylinder and also to discharge the reject from connections (4) and the accept from the connections (3) in the direction of rotation of the cylinder (5). Accordingly, there is not only less wear of the screen surface, but also a significantly smaller consumption of power per pulp ton than in the prior art apparatuses.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: May 22, 1990
    Assignee: A. Ahlstrom Corporation
    Inventors: Kaj O. Henricson, Erkki T. Repo, Hannu U. Ronkonharju
  • Patent number: 4915822
    Abstract: A method and an apparatus for treating a fiber suspension wherein the fiber suspension is fed into a treatment apparatus having treatment zones and divided into two fractions, an accept and a reject, the reject being guided from one zone behind at least one adjacent treatment zone to a separate reject treatment zone, in which the remaining accept of the suspension is discharged. The apparatus being divided into a plurality of axial zones and having a rotor and at least one screen arranged in an outer housing, and in the treatment space between the screen and the rotor, members are arranged for guiding the suspension from the different treatment zones of the treatment space to the separate reject treatment zone.
    Type: Grant
    Filed: October 2, 1988
    Date of Patent: April 10, 1990
    Assignee: A. Ahlstrom Corporation
    Inventor: Risto A. Ljokkoi
  • Patent number: 4902409
    Abstract: A nozzle block (66) and a sieve screen unit (12), in which the outlet aperture (78) of the nozzle body (68) has a substantially oval shape to produce a fan-shaped flow pattern against the screen (24). Two nozzle blocks (66a), (66b) are mounted within the sieve screen housing (24), each block having a substantially solid, cuboid body including an outlet aperture that distributes slurry over the full width of the screen.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: February 20, 1990
    Assignee: Sprout-Bauer, Inc.
    Inventor: Jack W. Clark
  • Patent number: 4872953
    Abstract: An apparatus and method for improving the quality of paper manufactured from recycle paper stock which comprises a hydrokinetic amplifier, a pulper, a dump chest, a cyclone separator, a pressure screen, a vibratory screen and a holding tank. Contaminants contained in the fibrous stock are dispersed and emulsified during the process to produce a better quality fiber stock. The hydrokinetic amplifier generates pressure at its exit while dispersing the contaminants in the fiber stock. The energy possessed in the stock can be utilized to feed the stock through additional treatment devices such as ultrasonic generators and a device for causing the stock to take a tortuous path as it is passed therethrough to further break down the contaminants.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: October 10, 1989
    Assignee: EZE Products, Inc.
    Inventor: William E. Smith
  • Patent number: 4857175
    Abstract: A debris catcher comprising a conical screen (filter) in a drill string which defines an annular accumulation space between the screen and the inner wall of the drill string is presented. The central portion of the screen is open to establish an unimpeded flow path. A centrifugal deflector, impeller or similar device above (upstream from) the screen establishes a helical flow pattern in the drilling mud whereby debris entrained in the mud is forced outwardly by centrifugal action. The debris is then caught in the annular accumulation space between the screen and the drill string wall when the mud flows through the screen. If the accumulator fills or the screen becomes clogged, mud will still flow through the center flow passage. The debris catcher of the present invention is preferably positioned within a drill string upstream of a mud powered turbine or other device in the mud stream, the operation of which may be jeopardized by debris in the mud stream.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: August 15, 1989
    Assignee: Teleco Oilfield Services Inc.
    Inventor: Ralph F. Spinnler
  • Patent number: 4849105
    Abstract: An apparatus for removing solid particles from cooling water having a tubular housing (1), a funnel-shaped trap sieve (4) attached to the inner housing wall with the tip facing in the flow direction, and a pressurized water sprayer (11). The sprayer includes a washer arm (14), concentrally rotatable about the downstream side (23) of trap sieve (4), and having at least one slit nozzle (15) directed toward the downstream surface (23). A suction tube (8) extends into a collecting chamber (10) of trap sieve (4). To prevent large particles from jamming rotating components, trap sieve (4) is cleaned by spraying water only against the downstream side. The tip of the sieve is defined by a cylindrical container (5) having a closed bottom (6). The intake end (9) of suction tube (8) extends into the container. Wash water is introduced into washer arm (14) through an inner end fixedly attached to a hollow flange (13) mounted on a rotary shaft (12) of pressurized spray apparatus (11).
    Type: Grant
    Filed: August 11, 1987
    Date of Patent: July 18, 1989
    Assignee: GEA Energiesystemtechnik GmbH & Co.
    Inventor: Werner Borchert
  • Patent number: 4789068
    Abstract: A multi-stage apparatus and process for separating wood chips of a desired size range for pulp production, from an intermixture of materials e.g. from a log chipper. A disc screen screens out the chips and other materials having a size larger than the designated size range. The chips are deposited on an air separating screen through which a vacuum is drawn to draw out the smaller size materials, e.g. sawdust, and to deposit the desired pulp chips for collection and conveyence to the paper processing station.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: December 6, 1988
    Inventor: Larry J. Gilmore
  • Patent number: 4726880
    Abstract: An apparatus for improving the quality of paper manufactured from a contaminated fibrous stock having therein recycled paper pulp and contaminants smaller than a predetermined size and with a specific gravity approximately that of the specific gravity of whitewater used in the production of recycled paper stock comprises a hydrokinetic amplifier having a mixing chamber connected to each of a steam inlet, a stock inlet, a chemical feed inlet, an overflow discharge and a venturi. The venturi is connected to an outlet of the hydrokinetic amplifier. The apparatus also includes a pulper, a dump chest, a cyclone separator, a pressure screen, a vibratory screen, a holding tank, a pump, and various auxiliary pumps, valves, piping and sources of steam and whitewater.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: February 23, 1988
    Assignee: EZE Products, Inc.
    Inventor: William E. Smith
  • Patent number: 4710286
    Abstract: A sieve for powder. The sieve has a housing in which a transverse screen is mounted to divide the housing into upper and lower chambers. Air under pressure carries powder into a cyclone stack mounted on top of the housing from which it is directed onto the screen. A vibrator is connected to the screen to vibrate and thus to assist in the sieving operation. The screen is downwardly inclined and overlying its lower end an inspection cover is mounted in the housing to permit access to the screen for removal for the material which does not pass through the screen.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: December 1, 1987
    Assignee: Nordson Corporation
    Inventor: Douglas C. Mulder
  • Patent number: 4699710
    Abstract: Apparatus for separating relatively large particles from dust particles, comprising an enclosed separating station for separating the large particles from the dust particles. The large particle and dust particle mixture is pneumatically conveyed from a supply source to the separating station. The separated large particles and dust particles are conveyed from the separating station to respective depositories by respective pneumatic conveyors.
    Type: Grant
    Filed: February 26, 1985
    Date of Patent: October 13, 1987
    Inventor: Paul J. Williams
  • Patent number: 4689143
    Abstract: A drum separator includes a cylindrical screen drum which is mounted for rotation within a sealed housing such that a small portion of the perimeter of the screen drum is exposed. Air, fibers, and fines are introduced onto a first part of the exposed portion of the screen drum and fines and air pass through the screen drum into the interior of the housing and then to a fines collector. Fibers which are too large to pass through the screen drum are carried by the rotation of the screen drum to a pick-up head which applies a low pressure to the exterior of the screen drum to remove the fibers. The pick-up head is pivotably mounted to the housing, and air cylinders lift the pick-up head away from the screen drum in the event of an impact. The pick-up head includes a pick-up bar and a plurality of fins which are shaped to optimize removal of fibers from the exterior of the screen drum.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: August 25, 1987
    Assignee: Kimberly-Clark Corporation
    Inventor: Robert M. Miers
  • Patent number: 4663030
    Abstract: In screening apparatus for paper making stock including a housing, a cylindrical perforated screen member separating the interior of the housing into a supply chamber and an accepts chamber on the inside and outside respectively of the screen member, an inlet port for supplying stock to one end of the supply chamber, an outlet port from the accepts chamber, a reject port from the supply chamber, and a rotor mounted for rotation within the screen member, the rotor is characterized by comprising a substantially circular disk which is of a thickness constituting a very minor fraction of the axial length of the screen member and has vanes mounted on its outer periphery which extend lengthwise of the screen member for rotation with the disk in the annular space between the periphery of the disk and the inner surface of the screen member.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: May 5, 1987
    Assignee: The Black Clawson Company
    Inventors: David E. Chupka, Mark W. Gilkey, Jimmy L. Winkler, Larry D. Markham
  • Patent number: 4650570
    Abstract: An assembly for straining of pulp suspensions and the like comprises a strainer drum (1) mounted in a strainer house (2). One or a plurality of devices (5-9) are provided, in order to free impurity particles from fibers, preferably designed like an impact plate, in the strainer house (2) in the flow path, so that the particles in the stream partly are subject to an impact action, and so that the stream is subjected to a variation in velocity.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: March 17, 1987
    Assignee: Celleco AB
    Inventor: Roland O. A. Fjallstrom
  • Patent number: 4634521
    Abstract: A screen for fibre pulp is provided with means for removal of light reject. The screening apparatus comprises a vertical cylindrical screen (2); and a rotor (3) which is concentrically disposed inside the screen and the substantially closed outer surface (9) of which together with the inner surface (10) of the screen defines a screening zone (11) for the pulp. A pipe (19) is provided inside the rotor (3) the upper end of the pipe being disposed adjacent to the inner surface (21) of the closed upper end (12) of the rotor (3).
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: January 6, 1987
    Assignees: Ahlstrom Corp, Oy Wilh.Schauman AB
    Inventors: Markku A. Simola, Vesa Haapoja
  • Patent number: 4623449
    Abstract: Apparatus for the separation of the reusable part from the unusable part of granular form filter material from filter equipment, particularly granular form activiated charcoal, comprising a base frame; a sieve drum for sieving of the granular form filter material rotatably mounted on the base frame; means for driving the seive drum; and means for pneumatically withdrawing the granular form filter material from the filter equipment and supplying the filter material to the sieve drum.
    Type: Grant
    Filed: March 22, 1984
    Date of Patent: November 18, 1986
    Inventor: Franz Bohnensieker
  • Patent number: 4619761
    Abstract: An improved method for screening and fractionation. By using a housing interiorly divided by a screen plate into a primary and a secondary chamber with the secondary chamber further divided by a fluid impermeable wall, a process fluid stream containing particulate material has a second and a third process fluid stream diverted from it. The second stream is outputed from the housing while the third stream is recirculated to the first chamber. It is demonstrated that high screening or fractionation efficiency is obtained by this method.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: October 28, 1986
    Assignee: Koppers Company, Inc.
    Inventor: Rune G. Franzen
  • Patent number: 4601819
    Abstract: The sorting apparatus contains a screen forming at least part of a circular-cylindrical surface and a rotor having a rotor shaft which is coaxially located at the lengthwise axis defined by the circular-cylindrical surface. The rotor possesses clearing blades and propelling blades arranged to follow or trail the clearing blades as seen in the rotary direction of the rotor. The clearing blades each comprise a front-positioned clearing edge which moves along the screen and a run-up surface which is inclined relative to a radial direction defined by the rotor. The run-up surface moves the fiber stock in a direction towards the rotor shaft and provides an open through-passage in the central region of the rotor. The propelling blades extend from the rotor shaft towards the screen and terminate at a distance from the surface defined by the screen.
    Type: Grant
    Filed: June 8, 1984
    Date of Patent: July 22, 1986
    Assignee: Escher W GmbH
    Inventors: Maurus Pellhammer, Wolfgang Siewert
  • Patent number: 4596497
    Abstract: A powder disperser comprises a nozzle having a narrow discharge port for discharging a powder. A high speed air flow discharge port forms a narrow air port encompassing the outer circumference of the discharge port of the nozzle and is inwardly slanting at an acute angle relative to the discharge direction of a powder flow from the nozzle. A powder dispersing passage is narrowly formed on the downstream side of the nozzle in a circular tube like shape or in a radial shape along the outer wall surface continuing from the outer wall of the high speed air flow discharge port. The powder discharge passage is connected to the powder supply port of a classifier located downstream next to the disperser.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: June 24, 1986
    Assignees: Nisshin Flour Milling Co., Ltd., Nisshin Engineering Co., Ltd.
    Inventors: Yukiyoshi Yamada, Shin Doi, Masayuki Yasuguchi
  • Patent number: 4540421
    Abstract: It is an object of the invention to provide a unit for discharging material, such as lengths of paper strip from an air stream. As shown in FIG. 1, a flow of air with suspended waste material enters, as illustrated by the arrow 1, along a duct 2. The flow is into an entry section 4 of a perforated duct 5 located within an outer casing 6 which forms an air duct. At the downstream end, the duct 5 leads into a bend section 7 which is perforated on the outside of the bend and at the sides. The flow of air or gas continues out of the open end 8 of the casing 6 as indicated by the arrow 9, while the suspended solid material is deflected by the bend section into a discharge duct 11, down which the solid material falls by gravity. The duct 11 is shown as including two pairs of optional isolating flap valves 12 so as to provide an air lock arrangement so that the air flow in the duct 11 is substantially zero.
    Type: Grant
    Filed: January 26, 1984
    Date of Patent: September 10, 1985
    Assignee: Matthews and Yates Limited
    Inventor: David J. Wilson
  • Patent number: 4536295
    Abstract: For the purpose of separating coarse particles from a liquid such as water, e.g. in the cellulose industry, laundries etc., a vertical container is used in which a nozzle receives liquid from a pump and sprays the liquid in the form of a conical liquid jet up against the underside of a screening cloth. Above this cloth there is an outlet for the liquid, coarse particles impinging against the cloth and falling back to the bottom of the container. In accordance with the invention the total flow from the pump and jet is led off via the screening cloth and outlet above said cloth, the liquid level in the container being disposed between the nozzle and the screening cloth so that the liquid jet is sprayed through a layer of the liquid in the container before reaching the screening cloth.
    Type: Grant
    Filed: October 13, 1983
    Date of Patent: August 20, 1985
    Assignee: AB Spray Technics S.T.
    Inventor: Bengt G. Janson
  • Patent number: 4519114
    Abstract: Apparatus and method for supplementary cleaning of cotton fibers employing a housing having an interior dividing screen separating the housing into two chambers and a fan adapted to entrain the fibers in a moving airstream and direct them into the housing against the screen for passage of the airstream and debris through the screen into one chamber and retention of the fiber in the other chamber. Reciprocably pivoting vanes divert the airstream back and forth across the screen to prevent accumulation of the fiber on the wall under the force of the airstream and to permit the fiber to fall from the wall after impact thereagainst. Alternatively, the conveying conduit may be movably mounted for side-to-side emission of the airstream into the housing. Ion emitters may be located at strategic locations to eliminate electrical attractive forces between the fibers and the debris.
    Type: Grant
    Filed: December 15, 1982
    Date of Patent: May 28, 1985
    Assignee: Rhyne Fibers, Inc.
    Inventor: Ralph H. Rhyne
  • Patent number: 4512880
    Abstract: Method of removing slimes from slime-containing slurries in which the slurry is force fed at an acute angle onto a downwardly directed screen surface of a welded profile wire screen having fine screen openings at a pressure which for the slime content and impact angle of the slurry on the screening surface will project water and suspended slimes from the slurry through and beyond the screen a distance sufficient to cause gravity discharge of the slime suspension free of contact with the back of the screen below the impact area.
    Type: Grant
    Filed: April 28, 1983
    Date of Patent: April 23, 1985
    Inventor: James D. Connolly
  • Patent number: 4502951
    Abstract: Suction device for obtaining dust samples of nearly homogeneous grain sizes and with a reproducible bulk density for the analysis of ores. The device, which is suitable for use during the mining of ores, includes a cylindrical casing, having an opening at each end thereof, and a cylindrical sieve insert, having an opening at each end thereof and being coaxially located within the casing. An inwardly-facing conically-shaped insert, located at the front end of said casing, provides flow communication between the front end of the casing and the sieve insert. A suction pipe socket is located laterally on the casing for attachment to suction-generating equipment. A filter is located over the mouth of the conically-shaped insert. The front end of a downwardly-curved dust-conducting tube is in direct communication with the back end of the sieve insert. There is a tube for collecting samples from the dust-conducting tube.
    Type: Grant
    Filed: December 21, 1982
    Date of Patent: March 5, 1985
    Assignee: Luossavaara-Kiirunavaara AB
    Inventors: Rainer Koenig, Rolf Sieglen, Wolfgang Weisser, Helga Heide
  • Patent number: 4485009
    Abstract: A granulation recovery device comprising a vacuum head, a canister removably attached to said vacuum head and a membrane and a support therefor which act as an interface between the vacuum head and the canister. The canister also contains means for diverting a granulation mixture away from the interface during operation of the device while simultaneously separating granulation from the granulation mixture. In operation, the device is attached to an exterior source of granulation loss.
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: November 27, 1984
    Assignee: Ortho Pharmaceutical Corporation
    Inventors: Steve L. Csontos, Charles L. Chamberlain
  • Patent number: 4476019
    Abstract: A pellet dryer is disclosed for removing plastic pellets from entraining water and drying the same. The rotating structure of the pellet dryer is essentially contained and supported on a door of a cabinet, so that the opening of the cabinet door exposes the pellet dryer structure and the interior of the cabinet for cleaning.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: October 9, 1984
    Assignee: The Black Clawson Company
    Inventors: Heinz K. Nowisch, Richard O. Alguire
  • Patent number: RE32182
    Abstract: Apparatus and method for use in making non-woven fabrics by wet-laying an aqueous dispersion. The apparatus and method screens, separates and remover fiber defects and foreign matter above a prescribed size from other dispersion fibers. The apparatus includes a housing having an inlet and several outlets, an accelerator within the housing for creating relative movement between the dispersion fluid and fibers to axially align at least some of the fibers in the direction of dispersion flow to disperse those fibers in the dispersion and a separator within the housing for separating bundles and lumps above a prescribed size from other dispersion fibers. The housing discharges the bundles and lumps above the prescribed size from the process at one outlet, and passes the other dispersion fibers through to another outlet for use in the wet-laying process.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: June 17, 1986
    Assignee: International Paper Co.
    Inventors: Michael Ring, Peter Angelini