Fiber length indicating apparatus and method

Details Fiber length indicating apparatus and method Fiber length indicating apparatus and method

D - Textiles, Paper

21

F

341/1, 92/52

D21F 1/00 (2006.01) D21D 1/00 (2006.01) D21G 9/00 (2006.01)

Patent

CA 1203599

ABSTRACT OF THE DISCLOSURE A standpipe is connected into a fiber processing system such as a paper making system, containing refined stock, or unrefined pulp, at operating consistencies. Automatic controls cycle a measurement chamber, in the standpipe, through intake measure and exhaust. An imperforate plate mounted across the measurement chamber has at least one hole of predetermined sub- stantially uniform cross dimension, or diameter, substantially equal to the relative length of fiber desired. Automatic timing establishes a set intake time for slurry, or suspension, to pass through the hole and contact lower and/or upper liquid level sensors, or other level indicators, in the chamber. Read-out is provided to indicate "too short", "too long" or "correct length" with each cycle. Differential pressure across the hole or ori- fice during measure, as well as approach velocity, is appropri- ately controlled.

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