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
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.
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)
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)
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 |
-
1969
- 1969-02-18 SE SE2196/69A patent/SE345295B/xx unknown
-
1970
- 1970-02-12 US US00010713A patent/US3779863A/en not_active Expired - Lifetime
- 1970-02-13 FI FI700407A patent/FI51384C/en active
- 1970-02-17 DE DE2007082A patent/DE2007082C3/en not_active Expired
- 1970-02-17 GB GB1290942D patent/GB1290942A/en not_active Expired
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 |