Paper making and fiber liberation – Processes and products – With measuring – inspecting and/or testing
Reexamination Certificate
2008-03-31
2009-11-17
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Processes and products
With measuring, inspecting and/or testing
C162S004000, C162S005000, C162S263000, C209S164000, C209S166000
Reexamination Certificate
active
07618517
ABSTRACT:
A method and apparatus are presented for determining the quantity of liquid and solid content in a removal stream of a froth created from a suspension that is generated during a froth flotation operation. Specifically, electrodes are immersed in the froth generated from a suspension having a known quantity of fiber particles, and the conductance of the froth is measured to establish a relationship between the measured conductance and the quantity of fiber particles. The electrodes are then submerged in a froth generated from a suspension having an unknown quantity of fiber particles, and the froth conductance is measured. The quantity of fiber particles in the froth can then be determined from the pre-established relationship between conductance and solid particle content.
REFERENCES:
patent: 5876558 (1999-03-01), Deng et al.
patent: 72006202 (1972-02-01), None
Gleisner Roland
Tan Freya
Zhu JunYong
Fado John D.
Halpern Mark
Shaw Lesley E.
Stockhausen Janet I.
The United States of America as represented by the Secretary of
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