Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Reexamination Certificate
2006-10-31
2006-10-31
Halpern, Mark (Department: 1731)
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
C162S263000, C162S049000, C700S129000, C700S128000, C700S127000, C073S159000, C156S064000
Reexamination Certificate
active
07128808
ABSTRACT:
A method and an apparatus for identifying mapping of a paper machine by means of a mapping test. The invention comprises forming a mapping model which takes the linear and non-linear shrinkage of a paper web into account. The mapping test result is analyzed to form a non-linear shrinkage profile and a linear mapping error from it. The linear error and the non-linear shrinkage profile thus obtained are used in the mapping model.
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Tapio Metsälä and John Shakespeare;Automatic Identification Of Mapping And Responses For Paper Machine Cross Directional Control; Control Systems '98; Porvoo, FINLAND.
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D. Gorinevsky, M. Heaven, C. Hagart-Alexander, M. Kean and S. Morgan;New Algorithms For Intelligent Identification Of Paper Alignment And Nonlinear Shrinkage; Pulp & Paper 1997; pp. T209-T214; CANADA.
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Copy of Official Action for Finnish Priority Appl. No. 19992849, dated Oct. 12, 2000.
Metsälä Tapio
Shakespeare John
Alston & Bird LLP
Halpern Mark
Metso Automation Oy
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