(19)
(11) EP 0 092 678 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.10.1984 Bulletin 1984/42

(43) Date of publication A2:
02.11.1983 Bulletin 1983/44

(21) Application number: 83102884

(22) Date of filing: 23.03.1983
(84) Designated Contracting States:
AT DE FR GB SE

(30) Priority: 24.03.1982 US 361300

(71) Applicant: Bolton-Emerson, Inc.
 ()

(72) Inventor:
  • Danforth, Donald W.
     ()

   


(54) Fiber length indicating apparatus and methods


(57) A standpipe (31) is connected into a fiber processing system such as a paper making system, containing refined stock, or unrefined pulp, at operating consistencies. Automatic control cycles a measurement chamber (34) in the standpipe, through intake measure and exhaust. A plate (33) mounted across the measurement chamber has at least one hole (37) of predetermined 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 or each hole (37) and contact lower (68) and/or upper (69) 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 or each hole during measure, as well as approach velocity, is appropriately controlled.







Search report