Patents Assigned to Measurex Corporation
  • Patent number: 6466839
    Abstract: A system of providing fast machine direction (MD) and cross direction (CD) basis weight adjustments using a simultaneous multi-point water weight sensor which provides independent MD and CD measurements is described. The water weight sensor is placed under the wire of the sheetmaking machine and provides fast wet end water weight measurements which are converted into predicted dry end basis weight information and used to control operating variables of machine elements in the sheetmaking machine to compensate for high frequency process variations. MD wet end measurements are used to control operating variables of machine elements that influence the MD dry end basis weight and CD wet end measurements are used to control operating variables of machine elements that influence CD dry end basis weight.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: October 15, 2002
    Assignee: Honeywell-Measurex Corporation
    Inventors: E. Michael Heaven, Claud Hagart-Alexander, Lee Chase, John D. Goss, David Watson
  • Patent number: 6404502
    Abstract: A single gloss sensor which can perform both DIN gloss measurement and DIN high gloss measurement, using the same hardware, and with minimal delay between the two measurements. The gloss sensor functions by directing light beams from a source to two different positions, either concurrently, or sequentially, between a position which measures gloss (75.degree) and a position which measures high gloss (45.degree). The gloss sensor also provides a reference light beam for correction of errors caused by the window glass, such as by dirt buildup.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: June 11, 2002
    Assignee: Honeywell-Measurex Corporation
    Inventors: John G. Preston, Edward Belotserkovsky
  • Patent number: 6341522
    Abstract: A sensor imbedded roller for detecting changes in properties of a material and a measurement apparatus including a fixed impedance element coupled in series with a variable impedance sensor imbedded roller between an input signal and a reference potential (e.g. ground) is described. The sensor, which includes an electrode configuration, is imbedded into a roller such that when it rotates it comes in contact with the material being measured and its impedance varies. The variable impedance of the sensor relates to changes in property of the material being sensed which can then be related to changes in other physical characteristics of the material such as weight, chemical composition, and temperature. Sensor imbedded rollers can be placed in a sheetmaking machine to measure the pre-formed and post-formed paper product.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: January 29, 2002
    Assignee: Measurex Corporation
    Inventors: John D. Goss, Lee Chase
  • Patent number: 6281689
    Abstract: A sensor apparatus and electrode configuration within the sensor apparatus for measuring electrical characteristics of an aqueous fibrous composition. The electrode configuration includes an elongated ground electrode and at least one segmented electrode to form an array of measurement electrode cells. The electrode configuration further includes an array of reference electrode cells formed by a plurality of reference electrodes built into the array of measurement electrode cells. The measurement electrode cells and reference electrode cells have a different sensitivity to water weight of the aqueous fibrous composition and the same sensitivity to conductivity of the aqueous fibrous composition. The measurement apparatus obtains simultaneous resistive measurements from both measurement and reference cells and determines the ratio of the measurements such that the affects from conductivity is canceled out of the measurement ratio.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: August 28, 2001
    Assignee: Honeywell-Measurex Corporation
    Inventors: Lee Chase, John D. Goss, Claud Hagart-Alexander, Martin G. Clarke, Graham V. Walford, Raymond Yu
  • Patent number: 6168687
    Abstract: Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly proportional to the total water weight within the wet stock; consequently, the sensor provides information which can be used to monitor and control the quality of the paper sheet produced. Because CD water weight profile is obtained practically instantaneously, the MD and CD variations are essentially decoupled. Quality improvements to the sheet fabricated will be achieved by providing fast control of the actuators on the machine and by tuning components on the machine to eliminate the sources of variations.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: January 2, 2001
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Lee Chase, John Goss, John Preston
  • Patent number: 6149770
    Abstract: A system and method of providing on-line turbulence measurements in a sheetmaking machine and using these measurements to perform on-line adjustments to turbulence-inducing and adjusting elements in the sheetmaking machine to optimize final sheet product quality. Turbulence measurements are obtained using water weight sensors in the wet-end of the sheetmaking machine and specifically under wire water weight measurements. Water weight readings are correlated to turbulence intensity levels by correlating ranges of water weights to intensity level intervals. A turbulence processing sensor sorts accumulated water weight measurement readings into intensity level intervals to obtain turbulence measurements or a turbulence profile. The turbulence measurements or profile is provided to a machine element controller which uses the measured turbulence information and target turbulence information to generate control signals.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: November 21, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Claud Hagart-Alexander, Lee Chase, John D. Goss, David Watson
  • Patent number: 6126785
    Abstract: Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly proportional to the total water weight within the wet stock; consequently, the sensor provides information which can be used to monitor and control the quality of the paper sheet produced. Because CD water weight profile is obtained practically instantaneously, the MD and CD variations are essentially decoupled. Quality improvements to the sheet fabricated will be achieved by providing fast control of the actuators on the machine and by tuning components on the machine to eliminate the sources of variations.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: October 3, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Lee Chase, John Goss, John Preston
  • Patent number: 6099690
    Abstract: Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly proportional to the total water weight within the wet stock; consequently, the sensor provides information which can be used to monitor and control the quality of the paper sheet produced. Because CD water weight profile is obtained practically instantaneously, the MD and CD variations are essentially decoupled. Quality improvements to the sheet fabricated will be achieved by providing fast control of the actuators on the machine and by tuning components on the machine to eliminate the sources of variations.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: August 8, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Lee Chase, John Goss, John Preston
  • Patent number: 6092003
    Abstract: System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire of a de-watering machine that has a refiner that is subject to a variable load and a headbox having at least one slice, wherein each slice has an aperture through which wet stock is discharged at a stock jet speed onto the wire that is moving at a wire speed. A sheet of wet stock moving a speed develops on the wire.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: July 18, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Claud Hagart-Alexander, Hung-Tzaw Hu, David Watson, John Preston
  • Patent number: 6086716
    Abstract: System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire of a de-watering machine that has means for supplying the amount of pulp from at least one source, means for adding an amount of non-fibrous additives to the wet stock, a refiner that is subject to a variable load and a headbox having at least one slice, wherein each slice has an aperture through which wet stock is discharged onto the wire.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: July 11, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: John David Watson, Claud Hagart-Alexander, John D. Goss, John G. Preston, Hung-Tzaw Hu, Laslo Dudas
  • Patent number: 6080278
    Abstract: A system and method of providing fast machine direction (MD) and cross direction (CD) basis weight adjustments using a simultaneous multi-point water weight sensor which provides independent MD and CD measurements is described. The water weight sensor is placed under the wire of the sheetmaking machine and provides fast wet end water weight measurements which are converted into predicted dry end basis weight information and used to control operating variables of machine elements in the sheetmaking machine to compensate for high frequency process variations. MD wet end measurements are used to control operating variables of machine elements that influence the MD dry end basis weight and CD wet end measurements are used to control operating variables of machine elements that influence CD dry end basis weight.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: June 27, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: E. Michael Heaven, Claud Hagart-Alexander, Lee Chase, John D. Goss, David Watson
  • Patent number: 6076022
    Abstract: System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire of a de-watering machine that has a refiner that is subject to a variable load and a headbox having at least one slice, wherein each slice has an aperture through which wet stock is discharged at a certain stock jet speed onto the wire that is moving at a certain wire speed. The system includes: a) at least two water weight sensors that are positioned adjacent to the wire wherein the at least two sensors are positioned at different locations in the direction of movement of the wire and upstream from a dry line which develops during operation of the machine and the sensors generate signals indicative of a water weight profile made up of a multiplicity of water weight measurements; and b) means for adjusting at least one of the stock jet speed, wire speed, or to cause the water weight profile to match a preselected or optimal water weight profile.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: June 13, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Claud Hagart-Alexander, Hung-Tzaw Hu, David Watson
  • Patent number: 6074483
    Abstract: A sensor and a method for determining the basis weight of a coating material containing CaCO.sub.3 on a substrate is described. The determined basis weight is insensitive to changes in the amount of substrate material underlying the coating. Signals from the sensor may be used in the control of a coating mechanism to provide a coating having a uniform basis weight.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: June 13, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Edward Belotserkovsky, John A. Dahlquist
  • Patent number: 6072309
    Abstract: System and method for producing paper that employ an apparatus for measuring electrical characteristics of a fibrous composition. The apparatus comprises a plurality of conductivity (or resistance) detectors each comprising a sensor that is sensitive to the conductivity (or resistance) and the proximity of the material (e.g., fibrous composition) to the sensor. Measurements from the apparatus relate to the zeta potential of the fibrous materials in the composition. The zeta potential profiles corresponding optimized configurations of the sheetmaking process can be employed to monitor and control the process.
    Type: Grant
    Filed: April 23, 1998
    Date of Patent: June 6, 2000
    Assignee: Honeywell-Measurex Corporation, Inc.
    Inventors: John David Watson, Hung-Tzaw Hu, Claud Hagart-Alexander, Lee Chase, John D. Goss
  • Patent number: 6059931
    Abstract: Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly proportional to the total water weight within the wet stock; consequently, the sensor provides information which can be used to monitor and control the quality of the paper sheet produced. Because CD water weight profile is obtained practically instantaneously, the MD and CD variations are essentially decoupled. Quality improvements to the sheet fabricated will be achieved by providing fast control of the actuators on the machine and by tuning components on the machine to eliminate the sources of variations.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: May 9, 2000
    Assignee: Honeywell-Measurex Corporation
    Inventors: Hung-Tzaw Hu, Lee Chase, John Goss, John Preston
  • Patent number: 6006602
    Abstract: An apparatus and method for obtaining fiber weight measurements in the wet end of a sheetmaking system and for verifying fiber weight measurements taken in the wet end of a sheetmaking system which includes a water weight sensor positioned beneath the wire in the wet end of the sheetmaking system for obtaining water weight measurements and load cells residing beneath the water weight sensor for weighing the wet end sensor and the wire with wetstock (total weight) and without wetstock (tare weight). In one embodiment, the water weight measurement and the tare weight measurement are subtracted from the total weight to obtain the fiber weight in the wetstock. In another embodiment, the water weight measurement is used to obtain an predicted fiber weight measurement and the determined fiber weight is used to verify the predicted fiber weight measurement and the accuracy of the water weight measurement device.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: December 28, 1999
    Assignee: Honeywell-Measurex Corporation
    Inventors: John Preston, Lee Chase, Hung-Tzaw Hu, John D. Goss
  • Patent number: 5954923
    Abstract: An apparatus for sensing three properties of materials: the conductivity or resistance, the dielectric constant, and the proximity of the material to the sensor portion of the apparatus. The apparatus includes a fixed impedance element coupled in series with the sensor portion of the apparatus between an input signal and ground. The sensor portion of the apparatus is an electrode configuration which includes at least two electrodes with a portion of the material residing between and in close proximity to the electrodes. The sensor exhibits a variable impedance resulting from changes in physical characteristics of the material. The fixed impedance element and the variable impedance of the sensor portion form a voltage divider network such that changes in impedance of the sensor portion results in changes in voltage on the output of the apparatus.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: September 21, 1999
    Assignee: Honeywell-Measurex Corporation
    Inventors: Lee Chase, John Goss, Graham V. Walford
  • Patent number: 5944955
    Abstract: Apparatus and process for controlling the basis weight of paper produced in a papermaking machine are provided. In the papermaking process, a major portion of the paper stock flows through a first line that is controlled by a thick stock valve and a minor portion of the stock flow from the stuff box to the headbox is diverted through a second line that is regulated by a second valve (e.g., vernier valve). The thick stock valve is controlled by the dry end basis weight and the second valve responsive to measurements of the basis weight of the wet stock at the wire. The second line and control valve along with the wet end basis weight measurements form a fine control loop with fast response time whereas the first line and control valve that is responsive to dry end basis weight measurements form a course control loop. The dual control loops enable fast and actual basis weight control.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: August 31, 1999
    Assignee: Honeywell-Measurex Corporation
    Inventors: David A. Bossen, E. Michael Heaven, John D. Goss
  • Patent number: 5928475
    Abstract: A system and method that combine an array of fast under wire water weigh sensors with a scanning system provides an accurate measurement of the entire sheet down to 1 in. by 1 in. resolution. Because CD profiles are obtained instantaneously, MD and CD variations are completely decoupled, even if CD profiles are taken at longer intervals apart.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: July 27, 1999
    Assignee: Honeywell-Measurex, Corporation
    Inventors: Lee Chase, John D. Goss, Graham V. Walford, John Preston
  • Patent number: 5892679
    Abstract: A control system regulates a controlled process. A first controller receives at least a first input variable and a second input variable and produces at least a first control variable and a second control variable. A delay unifier associated with the first controller introduces a first delay to one of the first and second control variables, the first delay being determined as a function of a second delay associated with another of the first and second control variables. A processor models effects of the controlled process. The processor receives the delayed first and second control variables output by the first controller and produces estimates of the process output variables. A second controller processes a difference between measured process output variables and the estimated process output variables to correct for disturbances.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: April 6, 1999
    Assignee: Honeywell-Measurex Corporation
    Inventor: Xiaohua George He