With Recirculation Of Treated Material Patents (Class 34/316)
  • Patent number: 6910285
    Abstract: This invention provides a dried singulated cellulose pulp fiber product as well as an apparatus and a method for forming singulated and dried fibers. In accordance with the process a feed pulp is delivered to a jet drier. The jet drier singulates and dries the feed pulp. The singulated and dried fibers are collected from the jet drier. The feed pulp may be treated with a treatment substance. The jet drier may be maintained at negative pressure. The product fibers may have low knot count, a low fines count, as well improved kink, curl and twist. The apparatus for carrying out the process may include a pretreatment station for supplying the treatment substance, a pulp feed device designed for pulp, a pulp feed device designed for pulp and foam suspensions, and/or a fiber separation station having a vacuum conveyor.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: June 28, 2005
    Assignee: Weyerhaeuser Company
    Inventors: Michael David Vrbanac, Ramon Charles Dezutter, Brian Wester, Michael James Yancey
  • Patent number: 6837969
    Abstract: A method for the concentration of liquid mixtures includes the step of causing a continuous stream of the liquid mixtures to flow in the form of a turbulent thin layer in contact with a heated wall; for that purpose, a continuous stream of liquid mixture is fed into a turbo-concentrator including a cylindrical tubular body (1), a heating jacket (4) and a bladed rotor (8) rotatably supported in the cylindrical tubular body (1), and is centrifuged to form a dynamic and tubular thin layer, the thin layer advancing inside the cylindrical tubular body (1) then being discharged continuously in the form of a stream of concentrated liquid mixture.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: January 4, 2005
    Assignee: Vomm Chemipharma S.r.l.
    Inventor: Corrado Vezzani
  • Patent number: 6820350
    Abstract: Methods for drying fibrous lignocellulosic material are provided in connection with the manufacture of fiberboard. The fibrous material is transported with a first drying gas through a first drying line to a first cyclone where the first drying gas in conducted away from the fibrous material. Thereafter, the material is transported with a second drying gas through a second drying line to a second cyclone, where the second drying gas is conducted away while the fibrous material is advanced to a subsequent step. The second drying gas, which is conducted away from the second cyclone, is recirculated to the first drying step and used as a portion of the first drying gas. A portion of the first drying gas, which is conducted away from the first cyclone, is recirculated and used as drying gas at the first drying step.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: November 23, 2004
    Assignee: Valmet Fibertech AB
    Inventors: Lennart V. Eriksson, Stig Lennartsson
  • Patent number: 6408536
    Abstract: The present invention relates to a process for drying protein crystals starting from an aqueous protein crystal suspension, which comprises drying the protein crystal suspension in a centrifugal dryer, where the protein crystals, after they have been filtered off from the protein crystal suspension, are brought into contact with a drying medium which consists of a mixture of water and a nonaqueous solvent which is miscible with water in any ratio and which has a lower vapor pressure than water. In the process, a drying gas which has been moistened with water is advantageously used. The protein crystal suspension is advantageously converted into a fluidized bed for the purpose of drying.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: June 25, 2002
    Assignee: Aventis Pharma Deutschland GmbH
    Inventors: Rolf Deusser, Peter Kraemer, Horst Thurow
  • Patent number: 6146493
    Abstract: A method for the concentration of liquid mixtures, comprising the step of causing a continuous stream of the liquid mixtures to flow in the form of a turbulent thin layer in contact with a heated wall; for that purpose, a continuous stream of liquid mixture is fed into a turbo-concentrator comprising a cylindrical tubular body (1), a heating jacket (4) and a bladed rotor (8) rotatably supported in the cylindrical tubular body (1), and is centrifuged to form a dynamic and tubular thin layer, the thin layer advancing inside the cylindrical tubular body (1) then being discharged continuously in the form of a stream of concentrated liquid mixture.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: November 14, 2000
    Assignee: Vomm Chemipharma S.R.L.
    Inventor: Corrado Vezzani
  • Patent number: 6125550
    Abstract: The field of the invention is food drying apparatus and methods. In particular, the invention discloses a rotary dryer which dries food granules, such as rice, by rotation within a perforated cylindrical barrel, to prepare the rice for packaging. The dryer provides high velocity drying zones along its length, and high temperatures may be used.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: October 3, 2000
    Assignees: Riviana Foods, Inc., Satake Corporation
    Inventors: John Hugh Kendall, Ranvir Biki Mohindra, Duane Stephen Rutherford, Satoru Satake, Sigeharu Kanamoto, Katsuyuki Kumamoto
  • Patent number: 5715611
    Abstract: Humidity control apparatus for articles being stored, comprising: a) a chamber within which the articles are to be contained, b) a conveyor passing by a portion of, and exposed to, the contents of the chamber, c) a drive mechanism for driving the conveyor past the portion of the chamber, d) a desiccant on the conveyor, e) a humidistat positioned to measure the water vapor content within the chamber, and f) a control mechanism operatively connecting the humidistat and the drive mechanism for advancing fresh desiccant past the chamber when the water vapor content of the chamber is too high.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: February 10, 1998
    Assignee: Johnson & Johnson Clinical Diagnostics, Inc.
    Inventors: Merrit Nyles Jacobs, Roger G. Leighton, John J. Meyers