Profiling air/steam system for paper-making machines

Details Profiling air/steam system for paper-making machines Profiling air/steam system for paper-making machines

1987-04-27

1989-06-06

Alvo, Steve

Paper making and fiber liberation

Apparatus

Automatic control

34 54, 162206, 162207, 162290, 162DIG6, D21F 300, D21F 500

Patent

active

048368946

ABSTRACT:
Method and apparatus are provided for effectively controlling cross-machine moisture profile in a paper web undergoing processing, such as water-removal via a press nip. A compartmentalized system is provided in close proximity across a section of a traveling web undergoing dewatering whereby select size cross-machine compartments, for example, about 6" in width, are selectively provided with steam and/or air so as to control wet and/or dry streaks along the traveling web so that web areas opposite each compartment can be selectively heated for accentuated moistre removal or cooled for retarded water removal. In preferred embodiments, control of the profiling system occurs with the air of moisture sensors and a computer.

REFERENCES:
patent: 3089252 (1963-05-01), Daane et al.
patent: 3770578 (1973-11-01), Spurrel
patent: 3838000 (1974-09-01), Urbas
patent: 4114528 (1978-09-01), Walker
patent: 4249992 (1981-02-01), Wells
patent: 4253247 (1981-03-01), Bergstrom
patent: 4351700 (1982-09-01), Dove
patent: 4545857 (1985-10-01), Wells
patent: 4545857 (1985-10-01), Wells

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