Paper making and fiber liberation – Apparatus – Automatic control
Patent
1981-11-27
1983-05-24
Smith, William F.
Paper making and fiber liberation
Apparatus
Automatic control
162262, 162264, 162336, 162343, D21F 106
Patent
active
043849229
ABSTRACT:
An installation for charging a multi-ply headbox, wherein the mixing pumps of the stock infeed systems for the stock which is diluted with water, i.e. the stock slurries, are driven by a single drive motor by means of a common shaft. Additionally, a pressure differential-regulation device is provided for the fine tuning or coordination of the pressures of the stock suspensions in the headbox. Signals are inputted by means of pressure feelers or sensors to the pressure differential-regulation device. As a function of the deviations from a set or reference value there are activated regulation valves which are arranged in bypass lines shunting the mixing pumps. The bypass lines or conduits flow communicate with sieve water containers connected with the suction side of the mixing pumps. Through these measures there is avoided mechanical damage to the headbox, particularly to the partition walls arranged internally thereof.
REFERENCES:
patent: 3304869 (1967-02-01), Blume
patent: 3951570 (1976-04-01), De Biaggi
patent: 4021295 (1977-05-01), Schmaeng
patent: 4086130 (1978-04-01), Jostos
patent: 4153393 (1979-05-01), Cook
patent: 4192710 (1980-03-01), Bubik et al.
Escher Wyss GmbH
Kleeman Werner W.
Smith William F.
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