Title:
【発明の名称】抄紙機のシート測定制御方式ならびに方法
Document Type and Number:
Japanese Patent JP2002513099
Kind Code:
A
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. 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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Inventors:
Goth, Jiyoung Dee.
Chase lee
Huh, Hoon-Tsuau
Preston, Jiyoung
Chase lee
Huh, Hoon-Tsuau
Preston, Jiyoung
Application Number:
JP2000546098A
Publication Date:
May 08, 2002
Filing Date:
April 12, 1999
Export Citation:
Assignee:
Honeywell Media Rex Corporation
International Classes:
D21F3/02; D21F7/00; D21G9/00; (IPC1-7): D21F3/02
Attorney, Agent or Firm:
Toshio Takayama