Paper making and fiber liberation – Apparatus – Electric controls or systems
Patent
1988-05-10
1990-11-06
Alvo, Steve
Paper making and fiber liberation
Apparatus
Electric controls or systems
73 377, 73159, 162256, 162263, 226100, 242 57, D21F 706
Patent
active
049683861
ABSTRACT:
An apparatus and method for determining the frequency and amplitude of flutter of a moving web in a web manufacturing operation, is shown to include a sensor for sensing the pressure of air in a region proximate the web and for generating a pressure signal reflective of the air pressure and a signal processor, connected to receive the pressure signal, for determining the amplitudes and frequencies of the flutter from the pressure signal and for generating an indication signal representative of the flutter amplitude and frequency.
REFERENCES:
patent: 4031741 (1977-06-01), Schaming
patent: 4179330 (1979-12-01), Page
patent: 4425809 (1984-01-01), Bakel et al.
patent: 4496428 (1985-01-01), Wells
patent: 4501642 (1985-02-01), Wells
patent: 4523451 (1985-06-01), Boster
patent: 4637727 (1987-01-01), Ahola et al.
Pramila, Antti, "Sheet Flutter and the Interaction Between Sheet and Air", Tappi Journal, pp. 70-74 (Jul., 1986).
Smook, G. A., Handbook for Pulp & Paper Technologists, Tappi, Atlanta, Ga., Chapter 17, 1982 U.S.A. pp. 244-254.
Alvo Steve
Sites Edward J.
Union Camp Corporation
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