Paper making and fiber liberation – Apparatus – Automatic control
Reexamination Certificate
2007-10-09
2007-10-09
Hug, Eric (Department: 1731)
Paper making and fiber liberation
Apparatus
Automatic control
C162S199000, C162S252000, C162S253000, C162S259000, C162S262000, C162S263000, C162SDIG010, C162SDIG011
Reexamination Certificate
active
10493703
ABSTRACT:
Adjusting the operation of a wire section, in which the development of the consistency of stock on the wire section (2) is determined and the effect of the consistency determined above on the formation and/or porosity of a paper web (3) is determined. The consistency developed on the wire section is adjusted based on a quality property of paper and/or by optimising a cost function, the quality property of paper comprising the formation and/or the porosity and/or a combination defined by means of the formation and/or the porosity and the cost function including the effect of at least the formation and/or the porosity.
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Raisanen et al. “Effect of Vacuum Level and Suction Time on Vacuum Assisted Drainage of a Paper Machine Wire Section,” Appita 48thAnnual General Conference, Melbourne 1994.
Raisanen, “Water Removal by Flat Boxes ABD a Couch Roll on a Paper Machine Wire Section,”Helsinki University of Technology, Laboratory of Paper Technology Reports, Series A10, Espoo 1998.
Korhonen Hannu
Leinonen Antti
Muhonen Jukka
Partonen Minna
Rajala Jussi
Hug Eric
Metso Automation Oy
Oliff & Berridge PLC.
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