Method of refining fibrous material by controlling the feed rate

Details Method of refining fibrous material by controlling the feed rate Method of refining fibrous material by controlling the feed rate

1989-09-20

1990-07-24

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Regulatory

162253, 162254, 241 28, 241 34, 241 37, D21D 520, D21F 706

Patent

active

049433474

ABSTRACT:
A method of refining fibrous material under predetermined conditions by the help of relatively rotating refining means. The material is during refining passed from the inner circumference of the refining means to their outer circumference and is thereby exposed to bending forces and axial forces. At least two variables of the refining process, such as power and gap width are measured. The measured values of the variables and their relation are used to compare them with the set point values of the predetermined refining conditions for these variables to create control signals for positioning devices for the refining means, thereby returning the refining process to the aforementioned predetermined conditions and keeping these dependent variables constantly at these conditions.

REFERENCES:
patent: 3212721 (1965-10-01), Asplund et al.
patent: 3309031 (1967-03-01), McMahon et al.
patent: 3604645 (1971-09-01), Keyes, IV
patent: 3604646 (1971-09-01), Keyes, IV
patent: 3610541 (1969-10-01), Gudaz
patent: 3617006 (1971-11-01), Jones
patent: 3847359 (1974-11-01), Holmes et al.
patent: 4184204 (1980-01-01), Flohr
patent: 4589598 (1986-05-01), Ellery, Sr.
patent: 4661911 (1987-04-01), Ellery, Sr.
Rogers et al; "Automatic Control of Chip Refining"; 10-1980 Pulp and Paper Canada; vol. 81, No. 10, pp. 89-96.
Moore "Refiner Control-Working Group Report"; 9-1979 Paper Tech & Ind; pp. 256-258.
Derwent's abstract No. 53 416 K/22, SU 943 316, Jul. 15, 1982.
Derwent's abstract No. 84-206522/33, SU I 063 459, Dec. 30, 1983.

Affiliated with

Also associated with

Rating

Method of refining fibrous material by controlling the feed rate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of refining fibrous material by controlling the feed rate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of refining fibrous material by controlling the feed rate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1266503