Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Patent
1994-12-13
1998-07-28
Chin, Peter
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
162216, 162259, 162263, 162336, 162343, 162380, 162DIG11, 137 14, 137207, 137826, 137829, 137831, 138 26, 138 30, D21F 106
Patent
active
057858152
ABSTRACT:
Process for damping pressure pulsations and apparatus for performing the process. The process of this invention serves for the damping of pressure pulsations in a fluid, particularly a fiber suspension, flowing in a closed system wherein the pressure pulsations to be damped are measured at a measuring site and compensated at a correction site, with a throttle position being located between the measuring and the correction sites, with the damping of the imparted pressure impulses occurring at the correction site, which pressure impulses are opposite to the measured pressure pulsations, with the time periods thereof being about the same as those of the measured pressure pulsations. Several apparatuses for performing the process are also set forth.
REFERENCES:
patent: 4030971 (1977-06-01), Justus
patent: 4262700 (1981-04-01), Moen
patent: 4308095 (1981-12-01), Brendemuehl
patent: 4523977 (1985-06-01), Cantini
patent: 4750523 (1988-06-01), Crouse
patent: 4956050 (1990-09-01), Makela
Offical German Office Action dated Jul. 14, 1988.
Chin Peter
Sulzer-Escher Wyss GmbH
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