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| Number | Title | Issue Date |
| 6341522 | Water weight sensor array imbedded in a sheetmaking machine roll 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... | 01/29/2002 |
| 5891306 | Electromagnetic field perturbation sensor and methods for measuring water content in sheetmaking systems A system and method of producing a paper product from a wetstock solution using a sensor for sensing resistive impedance changes of the wetstock on the support web of the system. The resistive impedance changes are used to measure physical characteristics... | 04/06/1999 |
| 5838599 | Method and apparatus for nonlinear exponential filtering of signals The present invention is directed to a method and apparatus for filtering a signal of a control and/or signal processing system in a manner which achieves both rapid tracking of signal transients (e.g., step changes in the signal) and heavy filtering of n... | 11/17/1998 |
| 5771174 | Distributed intelligence actuator controller with peer-to-peer actuator communication A distributed intelligence control system for controlling a cross direction profile characteristic of a traveling sheet, such as paper, during production, includes a scanner for measuring a property of the sheet at a plurality of cross direction locations... | 06/23/1998 |
| 5714763 | Method and apparatus for optical alignment of a measuring head in an X-Y plane A two-dimensional position detector, in combination with dynamic z and/or flutter sensors, provides dynamic misalignment detection and correction of a measuring head, thereby allowing accurate determinations to be made of properties of a sheet material, s... | 02/03/1998 |
| 5654799 | Method and apparatus for measuring and controlling the surface characteristics of sheet materials such as paper An on-line laser triangulation position sensing system provides measurements of the surface features of a moving sheet such as paper. The measurements are correlatable with measurements made with standard laboratory surface smoothness testers and provide ... | 08/05/1997 |
| 5642192 | Dual spectrometer color sensor 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 c... | 06/24/1997 |
| 5642189 | Color sensor simulating standard source illuminant 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 c... | 06/24/1997 |
| 5539634 | Sheetmaking system identification using synthetic measurement produced from redundant noisy measurements In a continuous sheetmaking process, a synthetic measurement is constructed having a higher signal-to-noise ratio than that of each original measurement in situations where more than one (redundant) measurements are available. The input-output dynamic cha... | 07/23/1996 |
| 5455422 | Multiple coat measurement and control apparatus and method An apparatus and method for monitoring and regulating the amount of multiple coating materials containing different compositions applied to a substrate, such as paperboard. The coating measurement is insensitive to changes in both the amount of substrate ... | 10/03/1995 |
| 5432353 | Nuclear gauge A nuclear gauge (7) for making measurements of traveling webs (11) in continuous sheet-making processes includes an enclosure (20), an encapsulated nuclear source (28), and a wheel-like member (10) mounted in the enclosure means for carrying the encapsula... | 07/11/1995 |
| 5400258 | Automatic cross-directional control zone alignment for sheetmaking systems A system for aligning control zones with measurement zones in a sheetmaking system having a plurality of actuators arranged in the cross-direction, comprising the steps of: a) bumping at least one of the actuators; b) measuring a profile of the sheet at a... | 03/21/1995 |
| 5400247 | Adaptive cross-directional decoupling control systems A method and apparatus for controlling a multiple-input, multiple-output (MIMO) system, such as a sheetmaking system, including identifying a decoupling gain matrix by comparing an actuator control vector against a measured output vector and processing an... | 03/21/1995 |
| 5355083 | Non-contact sensor and method using inductance and laser distance measurements for measuring the thickness of a layer of material overlaying a substrate A non-contact thickness measuring sensor is disclosed which determines the thickness of an overlying material on a substrate. The sensor includes two non-contact separation distance measuring devices which may be utilized to measure the distance from the ... | 10/11/1994 |
| 5338361 | Multiple coat measurement and control apparatus and method The present invention relates to apparatuses and methods for measuring and controlling the amount of multiple coating materials applied to a substrate, and in particular to an apparatus and method for monitoring and regulating the amount of multiple coati... | 08/16/1994 |
| 5315124 | Nuclear gauge A nuclear gauge for making measurements of traveling webs in continuous sheet-making processes includes an enclosure, an encapsulated nuclear source, and a wheel-like member mounted in the enclosure means for carrying the encapsulated nuclear source betwe... | 05/24/1994 |
| 5297062 | Sensor, system and method for determining Z-directional properties of a sheet A sensor, system and method for determining the various Z-directional properties of a sheet by measuring the caliper of a moving sheet of material at a plurality of pressures. The invention employs a caliper gauge and a set of pressure transducers that ca... | 03/22/1994 |
| 5276327 | Sensor and method for mesaurement of select components of a material A sensor and method is provided for measuring one or more select components of a material. In one embodiment, a method measures the components by emitting electromagnetic radiation at the material and detecting the intensity of the emerging radiation at s... | 01/04/1994 |
| 5262955 | Dual mode cross-directional moisture control A sheet manufacturing system having a steam profiling bar, a moisture profiling bar, a moisture sensor and a computer is disclosed. The computer is programmed to cause the correct amount of steam or water to be applied on a slice-by-slice basis based upon... | 11/16/1993 |
| 5243407 | On-line paper sheet formation characterizing method and device A device for characterizing the formation of a sheet material is described. The device comprises a formation sensor for measuring the basis weight of the sheet material as the material passes through the sensor, and signal processing circuitry which recei... | 09/07/1993 |
| 5235192 | Sensor and method for measurment of select components of a material based on detection of radiation after interaction with the material A sensor and method is provided for measuring one or more select components of a material. In one embodiment, a method measures the components by emitting electromagnetic radiation at the material and detecting the intensity of the emerging radiation at s... | 08/10/1993 |
| 5226239 | Aerodynamic caliper gauge A contacting caliper gauge measures the thickness of a moving sheet material. The gauge has two heads, one on either side of the sheet. The sheet contacting pads of the caliper gauge are aerodynamically designed to limit and/or reduce the tendency of boun... | 07/13/1993 |
| 5171403 | Method for determining the bending stiffness of a moving sheet A method for determining bending stiffness of a moving sheet using an on-line sheet bending stiffness sensor. The sensor continuously bends the sheet as it is being manufactured and, based upon the force required to bend the sheet, the amount of bending a... | 12/15/1992 |
| 5165277 | System and process for determining properties of a moving sheet of material A sheet-gauging apparatus for determining properties of a moving sheet of material includes a frame having parallel upper and lower horizontal supports extending above and below the sheet in a direction transverse to the direction of travel of the sheet. ... | 11/24/1992 |
| 5166748 | Scanning interferometer sensor system An on-line scanning sensor system includes a mid-infrared spectrophotometric analyzer, such as an interferometer, that can be used on-line in manufacturing environments. More particularly, the on-line scanning sensor system includes a first carriage for s... | 11/24/1992 |
| 5163365 | Calender system for decoupling sheet finish and caliper control A system for at least partly decoupling the control of sheet finish and sheet caliper in a calender stack is disclosed. The system includes a heating device for heating the sheet with dry heat substantially immediately before the sheet is pressed by an up... | 11/17/1992 |
| 5164048 | Cooling structure for stabilizing the temperature of beams in a sheet-making apparatus Apparatus utilized in the continuous manufacture of sheet material, such as paper, includes a frame having at least one hollow beam for carrying means such as sheet-gauging heads operatively associated with the sheet material being fabricated. Thermal sta... | 11/17/1992 |
| 5138878 | Fiber orientation sensor A sensor for detecting directional variations in a physical characteristic of a moving sheet of material is disclosed. The sensor has a support for supporting the moving sheet. The support defines an open region into which the moving sheet is deflected by... | 08/18/1992 |
| 5124552 | Sensor and method for measuring web moisture with optimal temperature insensitivity over a wide basis weight range An infrared web moisture sensor which is substantially temperature and basis weight insensitive comprises a source of infrared radiation for directing an infrared beam through the web and an infrared detecting unit on the other side of the web which measu... | 06/23/1992 |
| 5122232 | Multiple steam applicator controller The invention provides multiple steam applicators which are used to distribute steam against a web during calendering. The invention includes a primary steam applicator located adjacent a side of the web to which steam is applied. The primary steam applic... | 06/16/1992 |
| 5121332 | Control system for sheetmaking A time delay compensation control system for use in controlling a sheetmaking process includes a controller operated according to the Smith Predictor control scheme and means to automatically adjust the closed-loop time constant of the controller in inver... | 06/09/1992 |
| 5117093 | Maintenance of linearity of support beam A system for controlling deflections of an elongate body transverse to a longitudinal axis of the body, the system including: a sensor mounted on the body for producing an output signal when the body experiences a deflection in at least one direction tran... | 05/26/1992 |
| 5111688 | Device and method for calibrating a non-destructive sheet strength measuring system A running blade is adapted to move at the same speed as a continuously running sheet and to generate a burst perforation through the sheet. The force exerted by the blade against the sheet is measured and used to calibrate a non-destructive sheet strength... | 05/12/1992 |
| 5106655 | Cross-directional smoothness controller and method of using the same An apparatus for controlling the cross-directional smoothness profile of the surface of a calenderable material substantially independently of the materials's caliper profile. A plurality of adjustable nozzles selectively direct jets of steam of selected ... | 04/21/1992 |
| 5104488 | System and process for continuous determination and control of paper strength A system and process for continuously determining the strength of paper sheet material during manufacture includes a plurality of sensors for detecting proxies related to properties such as the strength of individual fibers, length distribution of fibers,... | 04/14/1992 |
| 5101661 | Fiber orientation sensor A sensor for detecting directional variations in a physical characteristic of a moving sheet of material is disclosed. The sensor has a support for supporting the moving sheet. The support defines an open region into which the moving sheet is deflected by... | 04/07/1992 |
| 5101578 | System and process for drying a moving sheet A system for drying a moving sheet includes a housing, support means connected to the housing to support heater bulbs adjacent to moving sheet and a power supply connected to the bulbs. The heater bulbs are located so that at least part of the radiation f... | 04/07/1992 |
| 5094535 | Scanning sensor system including an FT-IR interferometer An on-line scanning sensor system includes first and second horizontally extending guide members connected by side members to define a rigid box-like frame, and a support structure for suspending the box-like frame via vibration-absorbing devices such tha... | 03/10/1992 |
| 5093795 | Dual mode cross-directional moisture control A sheet manufacturing system having a steam profiling bar, a moisture profiling bar, a moisture sensor and a computer is disclosed. The computer is programmed to cause the correct amount of steam or water to be applied on a slice-by-slice basis based upon... | 03/03/1992 |
| 5092678 | On-line sheet formation characterizing method and device A device for characterizing the formation of a sheet material is described. The device comprises a basis weight sensor for measuring the basis weight of the sheet material as the material passes through the sensor and signal processing circuitry which rec... | 03/03/1992 |
