GB1290942A - - Google Patents

Info

Publication number
GB1290942A
GB1290942A GB1290942DA GB1290942A GB 1290942 A GB1290942 A GB 1290942A GB 1290942D A GB1290942D A GB 1290942DA GB 1290942 A GB1290942 A GB 1290942A
Authority
GB
United Kingdom
Prior art keywords
pulp
stock
pump
pressure drop
orifice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1290942A publication Critical patent/GB1290942A/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/06—Regulating pulp flow

Landscapes

  • Paper (AREA)

Abstract

1290942 Papermaking ALLMANNA SVENSKA ELEKTRISKA AB 17 Feb 1970 [18 Feb 1969] 7489/70 Heading D2A [Also in Division G1] A method of preparing the stock fed to a paper machine in which stock is pumped by a mixing pump to a headbox from which stock is delivered to a foraminous support, comprises pumping pulp by means of a separate pulp pump through an orifice arranged in the flow path of the pulp to a mixing point for mixing the pulp with water to form the stock, measuring the pressure drop across the orifice, supplying to a comparison device a signal corresponding to the measured pressure drop and a reference signal corresponding to a desired pressure drop, to produce an error signal which is used to control the rate of pulp flow, the reference signal being dependant on the speed of the web at or near the downstream end of the machine. As shown, thick stock is fed via pump 17 in line 23 through orifice 18, e.g. a venturi tube, and a signal corresponding to the pressure drop fed in line 20 to control device 19. The speed of the paper web is measured at 37, the output squared, and fed via potentiometer 29 to control means 19 which alters pulp flow, either by adjusting pump 17 or by altering adjustable orifice 22. Wire speed and headbox pressure may be sensed at 25 and 32, respectively, and the signal used to control the mixing pump 13.
GB1290942D 1969-02-18 1970-02-17 Expired GB1290942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE2196/69A SE345295B (en) 1969-02-18 1969-02-18

Publications (1)

Publication Number Publication Date
GB1290942A true GB1290942A (en) 1972-09-27

Family

ID=20259536

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1290942D Expired GB1290942A (en) 1969-02-18 1970-02-17

Country Status (5)

Country Link
US (1) US3779863A (en)
DE (1) DE2007082C3 (en)
FI (1) FI51384C (en)
GB (1) GB1290942A (en)
SE (1) SE345295B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146425A (en) * 1974-10-02 1979-03-27 Sulzer Brothers Limited Papermaking machine headbox having a feed channel and an adjacent overflow sump
US4086130A (en) * 1976-07-16 1978-04-25 Beloit Corporation Control system and method for a multi-channel paper machine distributor
US4398996A (en) * 1981-06-19 1983-08-16 Albany International Corp. Vacuum control system and method for dewatering fabrics
ZA823543B (en) * 1981-06-19 1983-04-27 Albany Int Corp Vacuum control system for dewatering a web of paper
DE3206200C1 (en) * 1982-02-20 1983-06-01 Badische Karton- Und Pappenfabrik Zweigwerk Der Herzberger Papierfabrik Ludwig Osthushenrich Gmbh & Co Kg, 7562 Gernsbach Process for regulating the consistency in a fabric solver
DE4402516C2 (en) * 1993-07-05 1997-11-20 Voith Gmbh J M Device and method for the non-clogging throttling of a fluid suspension flow
US5611891A (en) * 1995-12-08 1997-03-18 Westvaco Corporation System and method for controlling papermaking stock consistency
FI19991793A (en) * 1999-08-23 2001-02-24 Andritz Ahlstrom Oy Method for controlling the operation of an inflow system of a paper machine or the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571219A (en) * 1950-05-17 1951-10-16 Cew Judson A De Deaeration of paper making fibers
US2847913A (en) * 1956-02-07 1958-08-19 Rice Barton Corp Stock inlet system for a paper making machine
US3077924A (en) * 1957-04-22 1963-02-19 Spruce Falls Power & Paper Co Paper making system
US3206917A (en) * 1961-10-04 1965-09-21 Clark & Vicario Corp Deaerated stock flow control
US3271241A (en) * 1962-12-10 1966-09-06 Kimberly Clark Co Stock supply system for papermaking machines including control of stock consistency and stock flow
US3293120A (en) * 1964-07-29 1966-12-20 Bailey Meter Co Paper machine pressurized headbox control of stock flow
US3562104A (en) * 1967-04-14 1971-02-09 Beloit Corp Stock flow control system for a headbox

Also Published As

Publication number Publication date
DE2007082A1 (en) 1970-11-26
SE345295B (en) 1972-05-23
FI51384C (en) 1976-12-10
DE2007082B2 (en) 1975-02-20
FI51384B (en) 1976-08-31
DE2007082C3 (en) 1975-09-25
US3779863A (en) 1973-12-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee