Paper making and fiber liberation – Apparatus – Automatic control
Reexamination Certificate
2007-04-30
2010-12-07
Hug, Eric (Department: 1791)
Paper making and fiber liberation
Apparatus
Automatic control
C162S262000, C162SDIG010, C700S127000
Reexamination Certificate
active
07846299
ABSTRACT:
A paper machine includes equipment for processing or producing a product in a continuous manner, such as a paper sheet. A grade change occurs when the equipment transitions from producing or processing a product having a first grade to producing or processing a product having a second grade. To support the grade change, a target for at least one controlled variable and a target for at least one manipulated variable are identified. The at least one manipulated variable and the at least one controlled variable are associated with the production of the product. A trajectory for the at least one manipulated variable and a corresponding trajectory for the at least one controlled variable are identified using the targets. The grade change is implemented using the trajectories so as to transition from production of the product having the first grade to production of the product having the second grade.
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Backstrom Johan U.
Bjorklund Mattias
Honeywell ASCa Inc.
Hug Eric
Munck Carter, LLP
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