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公开(公告)号：EP1021729A1
公开(公告)日：2000-07-26
申请号：EP99922961.0
申请日：1999-05-11
发明人： WATSON, John D. , HAGART-ALEXANDER, Claud , GOSS, John, D. , PRESTON, John, G. , HU, Hung-Tzaw , DUDAS, Laslo
CPC分类号： D21G9/0027 , D21D1/002 , D21F1/08 , Y10S162/06
摘要： System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire (7) 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 (20) that is subject to a variable load and a headbox (1) having at least one slice (11), wherein each slice (11) has an aperture through which wet stock is discharged onto the wire (7).
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公开(公告)号：EP1073910B1
公开(公告)日：2004-03-17
申请号：EP99919813.8
申请日：1999-04-12
CPC分类号： G01G9/00 , D21H23/08 , G01N33/343
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3.发明公开METHOD FOR MONITORING AND CONTROLLING WATER CONTENT IN PAPER STOCK IN A PAPER MAKING MACHINE 失效的程序对造纸机监视和控制WASSERGEHALTESVON纸浆
公开(公告)号：EP1234070A2
公开(公告)日：2002-08-28
申请号：EP98904695.8
申请日：1998-01-27
发明人： HU, Hung-Tzaw , TU, Francis
IPC分类号： D21F7/00
CPC分类号： D21G9/0027 , Y10S162/06 , Y10S162/10 , Y10S162/11
摘要： 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 content 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 provided. The invention which provides a linearized model of the de-watering process is based in part on that creation of drainage characteristic curves that provides an effective means of predicting the drainage behavior of the paper stock on the fabric of a de-watering system.
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4.发明公开
公开(公告)号：EP1137845A1
公开(公告)日：2001-10-04
申请号：EP99917415.4
申请日：1999-04-12
发明人： GOSS, John, D. , CHASE, Lee , HU, Hung-Tzaw , PRESTON, John
CPC分类号： D21G9/0027 , D21F7/003 , Y10S162/10 , Y10S162/11
摘要： 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. Further, the dry stock weight of a sheet of wet stock that is resting on a water permeable moving wire of the papermaking machine can be made employing a water weight sensor element that is positioned adjacent to the wire and that generates signals indicative of the water weight of the sheet of wet stock on the wire. Moreover, the moisture level cross-direction (CD) profile of a sheet of material that is produced can also be measured.
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公开(公告)号：EP1084473A1
公开(公告)日：2001-03-21
申请号：EP99927309.7
申请日：1999-06-07
CPC分类号： D21G9/0027
摘要： The system controls formation of wet stock (55) comprising fibers on a moving water permeable wire (13) of a de-watering machine that has a refiner (135) that is subject to a variable load and a headbox (10) having at least one slice (50), wherein each slice (50) has an aperture through which wet stock (55) is discharged at a stock jet speed onto the wire (13) that is moving at a wire (13) speed. A sheet of wet stock (55) moving a speed develops on the wire (13). The system includes: a) at least two water weight sensors (42A-42E) that are positioned adjacent to the wire wherein the at least two sensors (42A-42E) are positioned at different locations in the direction of movement of the wire (13) and upstream from a dry line (43) which develops during operation of the machine and the sensors (42A-42E) generate signals indicative of a water weight profile made up of a multiplicity of water weight measurements; and b) adjustability of at least one of the stock jet speed, sheet speed, wire speed, or refiner load to cause the water weight profile to match a preselected or optimal water weight profile.
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公开(公告)号：EP1073910A1
公开(公告)日：2001-02-07
申请号：EP99919813.8
申请日：1999-04-12
CPC分类号： G01G9/00 , D21H23/08 , G01N33/343
摘要： 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 (26) 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.
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