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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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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：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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