Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Patent
1984-01-31
1985-11-05
Alvo, Steve
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
162199, 162252, 162262, 162263, 162274, 415 26, 415 30, D21F 148
Patent
active
045512027
ABSTRACT:
A vacuum control system and method for dewatering felts or fabrics on a papermaking machine including a suction pipe and a centrifugal exhauster connected to the suction pipe to supply a variable vacuum level. The fabric is passed over a slot in the suction pipe so that suction applied therethrough will dewater the fabric. A variable drive device is connected to the centrifugal exhauster for its operation with the variable drive device being responsive to an increase in the vacuum level in the suction pipe as fabric permeability decreases to correspondingly increase the speed of the centrifugal exhauster so as to increase the vacuum level in the suction pipe as a function of the decrease in felt permeability.
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Lavigne, "Instrumentation Applications" Miller Freeman Publications, S. F.; 1979 pp. 208-209.
Bolton Joseph A.
Salls David J.
Albany International Corporation
Alvo Steve
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