Patents Assigned to BTG Källe Inventing AB
  • Patent number: 6929715
    Abstract: A method and a device for measuring concentrations especially in a pulp suspension, from which a sample has been taken. The sample is collected in a measuring vessel, in which a piston is guided upwards and downwards in order to press the sample from each direction through a measuring sensor collected at the side of the measuring vessel via communicating tubes connected in an upper and a lower position to the measurement vessel, whereby the sample is stirred totally to eliminate flocculation in the same. Measurement of the concentration of the sample is made either during the upwards and downwards movement of the piston in the measuring vessel and first occurs when the speed of the sample through the measuring sensor is constant and the sample has been homogenized after at least some movement upwards and downwards of the piston.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: August 16, 2005
    Assignee: BTG Källe Inventing AB
    Inventors: Gerdt Fladda, Jonny Weng
  • Patent number: 6548814
    Abstract: The invention is an apparatus and method for measuring a level, an interface level, and/or a density profile of at least one fluid in a container (2, 3) with at least two nuclear radiation sources (9) vertically arranged at a predetermined distance from each other inside or both inside and outside the tank. A defector unit (11) is used and includes a scintillator rod (12) with photo multiplier tubes (13) at each end. Electronic means provides information on fluid level positions and radiation levels at different places along the scintillator rod (12) by measuring pulse amplitudes from the photo multiplier tube. The radiation is converted to electric pulses having an amplitude proportionate to the light intensity of the radiation at the actual position along the rod (12). A ratiometric calculation of the amplitude determines the position of the corresponding radiation quant.
    Type: Grant
    Filed: June 1, 2000
    Date of Patent: April 15, 2003
    Assignee: BTG Källe Inventing AB
    Inventor: Bjorn Gronli
  • Patent number: 6463816
    Abstract: The invention relates to a device for collecting filtrate samples from a pulp suspension. It comprises a piston rod (3) which, when actuated by a cylinder (2), can reciprocate inside a jacket (5) and which is provided with a filter (4) arranged in an extended position to catch a sample. The filter (4) consists of a wire (6) having a triangular cross-section, the turns (8) of the wire being located close to each other and having their base surface (9) directed outwards and their converging surfaces directed inwards towards the center of the filter (4). During its retracting movement into the jacket the filter (4) is cleaned in the way that fibres which have got stuck on the filter are scraped away by the jacket.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: October 15, 2002
    Assignee: BTG Källe Inventing AB
    Inventor: Bengt Skålén
  • Patent number: 6428853
    Abstract: Application apparatus for the coating of a travelling web (5), comprising a support roll (3) and a predosage roll (7′), said rolls forming a nip between themselves through which the web is brought to travel, further comprising an application device (21) by which sizing agent or coating agent (13) can be transferred onto the web, and means (19) for final evening of material applied onto the web, characterized in that the application device (21) is designed in such a manner that it transfers directly onto the travelling web (5) said material (13) in a certain excess before entering the nip where predosage is provided before the subsequent and final evening of applied material.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: August 6, 2002
    Assignee: BTG Källe Inventing AB
    Inventor: Tore Eriksson
  • Patent number: 6332951
    Abstract: A method and a device for measuring the content of chemicals used in connection with bleaching of preferably cellulose fibers in a pulp, suspension for the purpose of providing a better and more uniform product quality and preventing overdosage of the bleaching chemical used. According to the invention a measurement sample is derived from a predetermined volume of the pulp suspension after or during the bleaching. Further, a catalyst in the shape of the enzyme catalase is added to the sample, which is agitated so that the bleaching chemical is decomposed and oxygen gas is generated, which oxygen gas pushes out a certain sample volume for the measurement sample, which sample volume is directly or indirectly converted, e.g. via a simple algorithm, to a value representing the content of the bleaching chemical used.
    Type: Grant
    Filed: June 21, 1999
    Date of Patent: December 25, 2001
    Assignee: BTG Källe Inventing AB
    Inventors: Gerdt Fladda, Stig Norder, Bertil Olsson
  • Patent number: 6312520
    Abstract: Coating blade for applying coating material onto a travelling web (41), particularly coating liquid onto a travelling paper web, comprising a steel band (3), which, along the edge section (7) intended to engage the web (41), is provided with a wear-resistant coating (5). Said coating is constituted by a material which has a hardness according to Shore A of from about 30 to about 80.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: November 6, 2001
    Assignee: BTG Källe Inventing AB
    Inventors: Tore Eriksson, Håkan Karlsson
  • Patent number: 6193799
    Abstract: Device for the application of a coating composition on a traveling web (17) comprising a transfer roll (5), a support roll (3) cooperating with the transfer roll (5), the traveling web being fed in a nip between said rolls, further comprising a gravure roll (7) intended for the transfer of an adapted quantity of the coating composition onto the transfer roll (5), and a device for passing of the web through said nip, characterized by a blade device (11, 13) for the removal of excess of coating composition from the gravure roll (7), said blade device being arranged in trailing position in relation to the moving surface of the gravure roll (7).
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: February 27, 2001
    Assignee: BTG Källe Inventing AB
    Inventor: Tore Eriksson
  • Patent number: D443837
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: June 19, 2001
    Assignee: BTG Källe Inventing AB
    Inventors: Niklas Elvin, Joakim Kullander