Method for controlling the moisture of a web in machine...

Details Method for controlling the moisture of a web in machine... Method for controlling the moisture of a web in machine...

2005-03-08

2005-03-08

Bareford, Katherine (Department: 1762)

Coating processes

Measuring, testing, or indicating

C427S382000, C427S395000, C427S444000

Reexamination Certificate

active

06863919

ABSTRACT:
The invention relates to a method by means of which the machine-direction moisture of a web being coated can be controlled in an optimal manner that takes into account moisture content changes along the entire path of the coating and drying process. Advantageously, all the dryers the coater section are controlled in an integrated manner in order to obtain a controlledly processed product which is optimized in regard to energy consumption and product quality. Each process section and unit contributing to the drying of the web is identified by means of a mathematical submodel describing the specific evaporation rate in the respective process section/unit and, by chaining these submodels, a composite model is compiled for the entire process, whereby the composite model makes it possible to manage the drying operation in the process so that the individual units are controlled as a portion of the overall process.

REFERENCES:
patent: 4087568 (1978-05-01), Fay et al.
patent: 4202112 (1980-05-01), Von der Eltz et al.
patent: 4498864 (1985-02-01), Roth et al.
patent: 4701857 (1987-10-01), Robinson
patent: 5377428 (1995-01-01), Clark
patent: 5715158 (1998-02-01), Chen
patent: 5718060 (1998-02-01), Mori
patent: 6446356 (2002-09-01), Hamström et al.
patent: 6490813 (2002-12-01), Oechsle
patent: 37 41 128 (1988-06-01), None
patent: 39 01 378 (1989-08-01), None
patent: 9841805 (1998-09-01), None
Derwent-Acc-No: 1998-496785—Abstract of WO 98/41805 (Sep. 24, 1998).

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