GB1360442A – Apparatus and method for performing coordinated changes of fibrous sheet parameters
– Google Patents
GB1360442A – Apparatus and method for performing coordinated changes of fibrous sheet parameters
– Google Patents
Apparatus and method for performing coordinated changes of fibrous sheet parameters
Info
Publication number
GB1360442A
GB1360442A
GB2026771A
GB2026771A
GB1360442A
GB 1360442 A
GB1360442 A
GB 1360442A
GB 2026771 A
GB2026771 A
GB 2026771A
GB 2026771 A
GB2026771 A
GB 2026771A
GB 1360442 A
GB1360442 A
GB 1360442A
Authority
GB
United Kingdom
Prior art keywords
sheet
weight
determined
fed
slurry
Prior art date
1970-02-03
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
GB2026771A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrial Nucleonics Corp
Original Assignee
Industrial Nucleonics Corp
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.)
1970-02-03
Filing date
1971-04-19
Publication date
1974-07-17
1971-04-19
Application filed by Industrial Nucleonics Corp
filed
Critical
Industrial Nucleonics Corp
1974-07-17
Publication of GB1360442A
publication
Critical
patent/GB1360442A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
D—TEXTILES; PAPER
D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
D21G9/00—Other accessories for paper-making machines
D21G9/0009—Paper-making control systems
Abstract
1360442 Automatic electric control INDUSTRIAL NUCLEONICS CORP 19 April 1971 [3 Feb 1970] 20267/71 Heading G3N A grade change on a fibrous sheet being produced by a machine is automatically carried out in response to a command in accordance with a calculated trajectory determined from weight parameters before and after the change and the time for the change. As shown, slurry is fed to a head-box 31 through a valve 32 controlled by an actuator 34. The actual slurry flow rate being determined by a feedback controller 45 positioning valves 37, 39. The slurry from a slice opening 47 collects on a Fourdrinier wire 48, driven at constant speed by a controller 53. The formed sheet is taken from the wire to a drier 57 the steam supply to which is controlled by a valve 59 responsive to a signal from a digital-to-analog converter 115. The dried sheet is monitored by a capacitive moisture gauge 67 and a nucleonic weight gauge before being wound on a coil 66. The outputs of gauges 67, 68 are combined in a circuit 73 to derive a signal indicative of fibre weight per unit area of sheet, which is fed to a computing network 111 together with set-point signals indicative of derived bone-dry weight and moisture from circuits 112, 113 and slurry flow and sheet velocity from circuits 46, 52. The network 111 provides output set-point signals to control the actuator 34 and supply the digitalto-analog converter 115. The set-point signals and primary control signals fed through AND-gates 114, 116 as determined by a process computer 121 having a stored program for deriving set-point changes which is set out in detail in the Specification. A memory 122 contains empirically determined relationship between bone-dry basis weight, moisture, head-box level and sheet velocity which are retrieved in response to a grade selection at source 125 made by an operator. Transition between grades is effected by the computer to avoid transient disturbances.
GB2026771A
1970-02-03
1971-04-19
Apparatus and method for performing coordinated changes of fibrous sheet parameters
Expired
GB1360442A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US838370A
1970-02-03
1970-02-03
Publications (1)
Publication Number
Publication Date
GB1360442A
true
GB1360442A
(en)
1974-07-17
Family
ID=21731333
Family Applications (2)
Application Number
Title
Priority Date
Filing Date
GB2026771A
Expired
GB1360442A
(en)
1970-02-03
1971-04-19
Apparatus and method for performing coordinated changes of fibrous sheet parameters
GB150774A
Expired
GB1360443A
(en)
1970-02-03
1971-04-19
Method and apparatus for controlling parameters of a fibrous sheet
Family Applications After (1)
Application Number
Title
Priority Date
Filing Date
GB150774A
Expired
GB1360443A
(en)
1970-02-03
1971-04-19
Method and apparatus for controlling parameters of a fibrous sheet
Country Status (5)
Country
Link
CA
(1)
CA968045A
(en)
DE
(1)
DE2105048A1
(en)
FR
(1)
FR2079220B1
(en)
GB
(2)
GB1360442A
(en)
SE
(2)
SE381524B
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1999004090A1
(en)
*
1997-07-14
1999-01-28
Valmet Automation Inc.
Method and apparatus for executing grade change in paper machine
US6640152B1
(en)
2000-03-24
2003-10-28
Abb Automation, Inc.
Modeling and control of sheet weight and moisture for paper machine transition
CN109426153A
(en)
*
2017-08-22
2019-03-05
霍尼韦尔有限公司
The application for being forced to slope variation based on Model Predictive Control (MPC)
1971
1971-01-29
CA
CA104,010A
patent/CA968045A/en
not_active
Expired
1971-02-02
SE
SE126571A
patent/SE381524B/en
unknown
1971-02-03
DE
DE19712105048
patent/DE2105048A1/en
active
Pending
1971-02-03
FR
FR7103652A
patent/FR2079220B1/fr
not_active
Expired
1971-04-19
GB
GB2026771A
patent/GB1360442A/en
not_active
Expired
1971-04-19
GB
GB150774A
patent/GB1360443A/en
not_active
Expired
1974
1974-06-27
SE
SE7408470A
patent/SE7408470L/
not_active
Application Discontinuation
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1999004090A1
(en)
*
1997-07-14
1999-01-28
Valmet Automation Inc.
Method and apparatus for executing grade change in paper machine
US6473670B1
(en)
1997-07-14
2002-10-29
Metso Paper Automation Oy
Method and apparatus for executing grade change in paper machine grade
US6640152B1
(en)
2000-03-24
2003-10-28
Abb Automation, Inc.
Modeling and control of sheet weight and moisture for paper machine transition
CN109426153A
(en)
*
2017-08-22
2019-03-05
霍尼韦尔有限公司
The application for being forced to slope variation based on Model Predictive Control (MPC)
EP3457226A1
(en)
*
2017-08-22
2019-03-20
Honeywell Limited
Application of model predictive control (mpc)-based forced ramping of process input variables and process output reference trajectory design over a prediction horizon for mpc-based paper machine grade change control
Also Published As
Publication number
Publication date
SE7408470L
(en)
1974-06-27
DE2105048A1
(en)
1971-08-19
CA968045A
(en)
1975-05-20
GB1360443A
(en)
1974-07-17
FR2079220A1
(en)
1971-11-12
SE381524B
(en)
1975-12-08
FR2079220B1
(en)
1973-06-08
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Legal Events
Date
Code
Title
Description
1974-11-27
PS
Patent sealed
1978-11-22
PCNP
Patent ceased through non-payment of renewal fee
