| Patent Number |
Title Of Patent |
Date Issued |
| 6466839 |
Fast CD and MD control in a sheetmaking machine |
October 15, 2002 |
| 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 mac |
| 6404502 |
Dual standard gloss sensor |
June 11, 2002 |
| 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 concurrent |
| 6281689 |
Means of correcting a measurement of a property of a material with a sensor that is affected by |
August 28, 2001 |
| 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 measureme |
| 6168687 |
System and method for sheet measurement and control in papermaking machine |
January 2, 2001 |
| 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 |
| 6149770 |
Underwire water weight turbulence sensor |
November 21, 2000 |
| 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 measureme |
| 6126785 |
System and method for sheet measurement and control in papermaking machine |
October 3, 2000 |
| 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 |
| 6099690 |
System and method for sheet measurement and control in papermaking machine |
August 8, 2000 |
| 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 |
| 6092003 |
Paper stock shear and formation control |
July 18, 2000 |
| 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 |
| 6086716 |
Wet end control for papermaking machine |
July 11, 2000 |
| 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 |
| 6080278 |
Fast CD and MD control in a sheetmaking machine |
June 27, 2000 |
| 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 |
| 6076022 |
Paper stock shear and formation control |
June 13, 2000 |
| 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 |
| 6074483 |
Coating weight measuring and control apparatus and method |
June 13, 2000 |
| 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 con |
| 6059931 |
System and method for sheet measurement and control in papermaking machine |
May 9, 2000 |
| 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 |
| 6006602 |
Weight measurement and measurement standardization sensor |
December 28, 1999 |
| 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 sheetmaki |
| 5954923 |
Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking |
September 21, 1999 |
| 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 |
| 5944955 |
Fast basis weight control for papermaking machine |
August 31, 1999 |
| 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 t |
| 5928475 |
High resolution system and method for measurement of traveling web |
July 27, 1999 |
| 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, |
| 5892679 |
Method and system for controlling a multiple input/output process with minimum latency using a p |
April 6, 1999 |
| 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 |
| 5854821 |
System and process for measuring ash in paper |
December 29, 1998 |
| A system and process are provided for determining the concentration of a first component of a mixture wherein the first component includes at least 3 materials. The process includes directing 2 beams of x-rays into the mixture and receiving portions of the beams which are transmitted thr |
| 5853543 |
Method for monitoring and controlling water content in paper stock in a paper making machine |
December 29, 1998 |
| A method of predicting the dry stock weight of paper that is produced by a papermaking machine based on simultaneousness measurements of (1) the water weight of the paper stock on the fabric or wire of the papermaking machine and of (2) the dry stock weight of the paper product is provid |
| 5796609 |
Method and apparatus for internal model control using a state variable feedback signal |
August 18, 1998 |
| The present invention relates generally to the control of processes which include relatively long time delays, yet which are susceptible to transient external disturbances, such as high-speed sheetmaking processes. Exemplary embodiments include a control system architecture that combines |
| 5793486 |
Dual spectrometer color sensor |
August 11, 1998 |
| Disclosed is an apparatus for measuring on-line the color and color-related properties of a moving sheet. Contrast ratio reflectance measurements are made for providing opacity corrections substantially in real time for a full color spectrum. An optical color sensor in accordance with th |
| 5778041 |
System and process for measuring ash in paper |
July 7, 1998 |
| A system and process are provided for determining the concentration of a first component of a mixture wherein the first component includes at least 3 materials. The process includes directing 2 beams of x-rays into the mixture and receiving portions of the beams which are transmitted thr |
| 5777872 |
Method and system for controlling a multiple input/output process with minimum latency |
July 7, 1998 |
| 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 |
| 5773714 |
Scanner beam dynamic deflection measurement system and method |
June 30, 1998 |
| In a scanner used in a paper-making process to measure basis weight and other parameters of the fabricated paper sheet, variations in the separation of an opposed pair of sensing heads due to temperature induced deflections of upper and lower beams on which the heads are movably moun |
