Method used in paper making for treatment of a weave

Details Method used in paper making for treatment of a weave Method used in paper making for treatment of a weave

1981-07-02

1983-07-05

Smith, William F.

Paper making and fiber liberation

Processes and products

Utilizing electrical or wave energy

162199, 162274, 68 3SS, 134 1, D21F 700

Patent

active

043916724

ABSTRACT:
Ultrasonic frequency sensor/radiators (hereinafter, radiators) are arranged in the vicinity of a material to be treated, on opposite sides of such material, opposite each other. In one embodiment, longitudinal acoustic vibrations are fed to the radiators at the same frequency and the phase difference of the vibrations fed to the different radiators is varied. In another embodiment, the vibrations are fed to the radiators at different frequencies f.sub.1 and f.sub.2 and the frequency difference .DELTA.f of the frequencies, where .DELTA.f=f.sub.1 -f.sub.2, is varied. In each embodiment the most intensive area of the field of vibration combinations in the material to be treated is focused by the radiators in a manner whereby it has an effect upon a desired area of the material.

REFERENCES:
patent: 2967119 (1961-01-01), Gutterman
patent: 3712085 (1973-01-01), Guberman et al.
patent: 3829328 (1974-08-01), Blustain

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