WO1995008024A1 - A method for controlling the orientation of fibers - Google Patents
A method for controlling the orientation of fibers Download PDFInfo
- Publication number
- WO1995008024A1 WO1995008024A1 PCT/US1994/009279 US9409279W WO9508024A1 WO 1995008024 A1 WO1995008024 A1 WO 1995008024A1 US 9409279 W US9409279 W US 9409279W WO 9508024 A1 WO9508024 A1 WO 9508024A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stock
- tubes
- flow
- orientation
- fibers
- 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.)
- Ceased
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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
-
- 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
- D21F1/02—Head boxes of Fourdrinier machines
-
- 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
- D21F1/02—Head boxes of Fourdrinier machines
- D21F1/026—Details of the turbulence section
Definitions
- PATENT APPLICATION TITLE A METHOD FOR CONTROLLING THE ORIENTATION OF FIBERS
- the present invention relates to a method for controlling the orientation of fibers within stock flowing through and from a headbox of a papermaking machine. More particularly, the present invention relates to a method for controlling the orientation of fibers such that the orientation of the fibers within the stock flowing from the headbox is relatively uniform in a cross-machine direction.
- pressurized stock is pumped to a header of a papermaking machine headbox.
- the header is tapered in a cross- machine direction such that the rate of flow of stock through each tube of a headbox tube bank is uniform. Excess flow of stock from the tapered header is recirculated.
- the stock flows through a plurality of the tubes of the tube bank, the tube bank including both vertical and horizontal rows of tubes.
- Stock emerging from each horizontal row of tubes is separated from the flow of stock emerging from an adjacent vertically disposed horizontal row of tubes by means of a trailing element anchored adjacent to the tube bank at the downstream end thereof.
- Such trailing element is anchored between the vertically spaced adjacent horizontal rows.
- Each of the trailing elements freely floats at the downstream end thereof within a slice chamber. The arrangement is such that the stock is evenly distributed in layers through the slice chamber so that the stock may be ejected from a downstream slice lip of the headbox onto a fourdrinier forming wire.
- the present invention simplifies the control of fiber orientation within the slice chamber by the provision of special edge tubes disposed adjacent to the respective side walls of the headbox.
- the oversize edge tubes permit the generation of a converging flow relative to each other because the quantity of stock flowing through the edge tubes is greater than the quantity of stock flowing through the remaining tubes.
- Such convergence of the flow paths of stock flowing through the edge tubes is compensated by bleeding stock immediately downstream relative to the edge tubes so that the orientation of fibers across the entire width of the resultant web is relatively uniform.
- the present invention relates to a method for controlling the orientation of fibers within stock flowing through and from a headbox of a papermaking machine.
- the method comprises the steps of generating an excess flow of the stock through edge tubes of a tube bank relative to the flow of stock through the remaining tubes of the tube bank.
- Such excess flow is attained by providing the edge tubes with a cross-machine directional flow area which is greater than the corresponding cross- machine directional flow area of each of the remaining tubes of the tube bank.
- Stock is then bled through the side walls of the headbox adjacent to and downstream relative to the edge tubes.
- the arrangement is such that the bleeding of the stock through the side walls compensates for any tendency for the flows of stock from the respective edge tubes to converge towards each other so that the orientation of the fibers within the stock flowing from the headbox is relatively uniform in a cross-machine direction.
- the step of generating an excess flow includes providing a replaceable insert within an upstream end of each of the edge tubes for throttling the excess flow.
- Such inserts have a cross-machine directional flow area greater than the cross-machine directional flow area of each of the remaining tubes of the tube bank.
- the step of generating an excess flow includes replacing the insert with an insert of a different cross-machine directional flow area until the amount of stock bled through the side walls is minimal while compensating for any tendency of the stock flowing from the edge tubes to converge.
- the step of generating an excess flow also includes replacing the insert with a further insert having a different cross-machine directional diameter relative to the cross-machine directional diameter of the insert in order to maximize the compensation while minimizing the step of bleeding the stock through the side walls.
- the step of bleeding stock through the side walls also includes bleeding the stock immediately downstream relative to the edge tubes.
- the step of bleeding also includes providing a bleed port disposed immediately downstream from the edge tube for cooperating with the flow from each of the edge tubes on both sides of the tube bank.
- the tube bank includes a plurality of vertically spaced edge tubes on a front side of the tube bank and a further plurality of vertically spaced edge tubes on a back side of the tube bank.
- the step of bleeding also includes conducting the flow of the stock bled through the front side wall through a manifold connected to each of the bleed ports in the front side wall. Additionally, the step of bleeding includes conducting the further flow of stock bled through the back side wall through a further manifold connected to each of the bleed ports in the back side wall.
- Figure 1 is a side-elevational view partially in section of a headbox of a papermaking machine according to the present invention
- Figure 2 is an enlarged plan view of the headbox shown in Figure 1 showing the flow of stock through the edge tubes and through the remaining tubes of the tube bank;
- Figure 3 is a similar view to that shown in Figure 2 but shows the bleed ports open in order to compensate for the edge flow convergence;
- Figure 4 is a sectional view taken on the line 4-4 of Figure 1 and shows the respective tubes of a tube bank arranged in vertical and horizontal rows;
- Figure 5 is an enlarged sectional view showing the insert within an upstream end of an edge tube
- Figure 6 is a sectional view of the insert taken on the line 6-6 of Figure 5;
- Figure 7 is a view similar to Figure 5 of a further insert.
- Figure 8 is a sectional view taken on the line 8-8 of Figure 7.
- Figures 1 -8 illustrate a method for controlling the orientation of fibers within stock S flowing through and from a headbox, generally designated 10, of a papermaking machine.
- the method comprises the steps of generating an excess flow of the stocks, as indicated by the arrows 12 and 13, for flowing through edge tubes 14 and 16, of a tube bank, generally designated 18, relative to the flow of the stock S through the remaining tubes, such as tubes 20,21 of the tube bank 18.
- the arrangement as shown in Figure 2 is such that excess flow, as indicated by the arrows 12 and 13, is attained by providing the edge tubes 14 and 16 with a cross-machine directional flow area which is greater than the respective cross-machine directional flow area of each of the remaining tubes 20,21.
- Stock, as indicated by the arrows 22,24 shown in Figure 3 is bled through the side walls 26 and 28 of the headbox 10 adjacent to and downstream relative to the edge tubes 14 and 16.
- the arrangement is such that the bleeding of the stock 22,24 through the side walls 26 and 28 compensates for any tendency for the flow of stock S from the respective edge tubes 14 and 16 to converge towards each other, as indicated by the arrow 12,13 of Figure 2, so that the orientation of fibers within the stock flowing from the headbox 10 is relatively uniform in a cross-machine direction CD.
- the step of generating excess flow includes providing a replaceable insert 30 shown in Figure 5 within an upstream end 32 of each of the edge tubes, such as edge tube 14, for throttling the excess flow 12,13.
- the insert 30 has a cross-machine directional flow area 34, as shown in Figure 6, which is greater than the cross-machine directional flow area 36 of each of the remaining tubes, such as 20 of the tube bank 18 as shown in Figure 4.
- the step of generating an excess flow also includes replacing the insert 30 with a further insert 38 having a different cross-machine directional flow area as shown in Figure 7 until the amount of stock S bled through the side walls 26 and 28 is minimal while compensating for the tendency for the flow 12,13 of stock S from the edge tubes 14 and 16 to converge.
- the step of generating an excess flow includes replacing the insert 30 with the further insert 38 having a different cross-machine directional diameter d relative to the cross-machine directional diameter D of the insert 30 in order to maximize the compensation while minimizing the step of bleeding the stock through the side walls 26 and 28.
- the step of bleeding includes bleeding the stock S immediately downstream relative to the edge tubes 14 and 16, respectively.
- the step of bleeding also includes providing bleed ports 40,42 shown in Figure 3 disposed immediately downstream from the edge tubes 14 and 16 for cooperating with the flow from each of the edge tubes 14 and 16 on both sides of the tube bank.
- the tube bank 18, as shown in Figure 4, includes a plurality of vertically spaced edge tubes 14,14a, 14b, 14c on a back side 26 of the tube bank 18 and a further plurality of vertically spaced edge tubes 16, 16a, 16b and 16c on a front side 28 of the tube bank 18.
- the step of bleeding also includes the step of conducting the flow of the stock S bled through the front side wall 28 through a manifold 44 connected to each of the bleed tubes 46,47,48 and 49 in the front side wall 28.
- the step of bleeding includes conducting the further flow of stock bled through the back side wall 26 through a further manifold 50 which is connected to each of the bleed ports 51 ,52,53 and 54 in the back side wall 26.
- the present invention provides a relatively simple method for controlling the orientation of fibers within stock passing through a headbox.
Landscapes
- Paper (AREA)
Abstract
The present invention relates to a method for controlling the orientation of fibers within stock (S) flowing through and from a headbox (10) of a papermaking machine. The method includes the steps of generating an excess flow of the stock (12, 13) through edge tubes (14, 16) of a tube bank (18) relative to the flow of stock (S) through the remaining tubes (20, 21) of the tube bank (18). The arrangement is such that excess flow (12, 13) is attained by providing the edge tubes (14, 16) with a cross-machine directional flow area which is greater than the respective cross-machine directional flow area of each of the remainging tubes (20, 21). Stock (22, 24) is bled through the side walls (26, 28) of the headbox (10) adjacent to and downstream relative to the edge tubes (14, 16). The arrangement is such that the bleeding of the stock (22, 24) through the side walls (26, 28) compensates for any tendency for the flow of stock (S) from the respective edge tubes (14, 16) to converge towards each other so that the orientation of the fibers within the stock flowing from the headbox (10) is relatively uniform in a cross-machine direction (CD).
Description
PATENT APPLICATION TITLE: A METHOD FOR CONTROLLING THE ORIENTATION OF FIBERS
Background Of The Invention Field Of The Invention
The present invention relates to a method for controlling the orientation of fibers within stock flowing through and from a headbox of a papermaking machine. More particularly, the present invention relates to a method for controlling the orientation of fibers such that the orientation of the fibers within the stock flowing from the headbox is relatively uniform in a cross-machine direction.
Information Disclosure Statement
In the papermaking art, pressurized stock is pumped to a header of a papermaking machine headbox. The header is tapered in a cross- machine direction such that the rate of flow of stock through each tube of a headbox tube bank is uniform. Excess flow of stock from the tapered header is recirculated. The stock flows through a plurality of the tubes of the tube bank, the tube bank including both vertical and horizontal rows of tubes.
Stock emerging from each horizontal row of tubes is separated from the flow of stock emerging from an adjacent vertically disposed horizontal row of tubes by means of a trailing element anchored adjacent to the tube bank at the downstream end thereof. Such trailing element is anchored between the vertically spaced adjacent horizontal rows.
Each of the trailing elements freely floats at the downstream end thereof within a slice chamber. The arrangement is such that the stock is evenly distributed in layers through the slice chamber so that the stock may be ejected from a downstream slice lip of the headbox onto a fourdrinier forming wire.
In the past, problems have been experienced particularly at the respective side edges of the formed web due to non-uniform orientation of the fibers within the stock adjacent to the edges of the web.
Prior art attempts to overcome the aforementioned problem have included the lateral injection of stock through the side walls of the slice chamber downstream relative to the tube bank. Such lateral injection compensates for any tendency of the stock flowing through the edge tubes to curve outwardly towards the respective side walls of the slice chamber.
The aforementioned lateral injection of stock is taught in U.S. Patent No. 5,149,402 to Riddick. However, the aforementioned lateral injection method requires continuous monitoring of the fiber orientation and appropriate adjustment of the pressure at which the laterally injected stock is injected into the main flow of stock in the slice chamber.
The present invention simplifies the control of fiber orientation within the slice chamber by the provision of special edge tubes disposed adjacent to the respective side walls of the headbox. The oversize edge tubes, according to the present invention, permit the generation of a converging flow relative to each other because the quantity of stock flowing through the edge tubes is greater than the quantity of stock flowing through the remaining tubes. Such convergence of the flow paths of stock flowing through the edge tubes is compensated by bleeding stock immediately
downstream relative to the edge tubes so that the orientation of fibers across the entire width of the resultant web is relatively uniform.
Therefore, it is a primary objective of the present invention to overcome the aforementioned inadequacies of the prior art arrangements and to provide a method for controlling the orientation of fibers by the provision of oversize edge tubes in combination with means for bleeding stock immediately downstream relative to such edge tubes.
Other objects and advantages of the present invention will be readily apparent to those skilled in the art by a consideration of the detailed description contained hereinafter, taken in conjunction with the annexed drawings.
Summary Of The Invention
The present invention relates to a method for controlling the orientation of fibers within stock flowing through and from a headbox of a papermaking machine. The method comprises the steps of generating an excess flow of the stock through edge tubes of a tube bank relative to the flow of stock through the remaining tubes of the tube bank. Such excess flow is attained by providing the edge tubes with a cross-machine directional flow area which is greater than the corresponding cross- machine directional flow area of each of the remaining tubes of the tube bank.
Stock is then bled through the side walls of the headbox adjacent to and downstream relative to the edge tubes. The arrangement is such that the bleeding of the stock through the side walls compensates for any tendency for the flows of stock from the respective edge tubes to converge
towards each other so that the orientation of the fibers within the stock flowing from the headbox is relatively uniform in a cross-machine direction.
In a more specific method of carrying out the present invention, the step of generating an excess flow includes providing a replaceable insert within an upstream end of each of the edge tubes for throttling the excess flow. Such inserts have a cross-machine directional flow area greater than the cross-machine directional flow area of each of the remaining tubes of the tube bank.
Additionally, the step of generating an excess flow includes replacing the insert with an insert of a different cross-machine directional flow area until the amount of stock bled through the side walls is minimal while compensating for any tendency of the stock flowing from the edge tubes to converge.
The step of generating an excess flow also includes replacing the insert with a further insert having a different cross-machine directional diameter relative to the cross-machine directional diameter of the insert in order to maximize the compensation while minimizing the step of bleeding the stock through the side walls.
The step of bleeding stock through the side walls also includes bleeding the stock immediately downstream relative to the edge tubes.
The step of bleeding also includes providing a bleed port disposed immediately downstream from the edge tube for cooperating with the flow from each of the edge tubes on both sides of the tube bank. The tube bank includes a plurality of vertically spaced edge tubes on a front side of
the tube bank and a further plurality of vertically spaced edge tubes on a back side of the tube bank.
The step of bleeding also includes conducting the flow of the stock bled through the front side wall through a manifold connected to each of the bleed ports in the front side wall. Additionally, the step of bleeding includes conducting the further flow of stock bled through the back side wall through a further manifold connected to each of the bleed ports in the back side wall.
Many variations and modifications of the present invention will be readily apparent to those skilled in the art by a consideration of the detailed description contained hereinafter, taken in conjunction with the annexed drawings. However, such modifications and variations fall within the spirit and scope of the present invention as defined by the appended claims.
Brief Description Of The Drawings
Figure 1 is a side-elevational view partially in section of a headbox of a papermaking machine according to the present invention;
Figure 2 is an enlarged plan view of the headbox shown in Figure 1 showing the flow of stock through the edge tubes and through the remaining tubes of the tube bank;
Figure 3 is a similar view to that shown in Figure 2 but shows the bleed ports open in order to compensate for the edge flow convergence;
Figure 4 is a sectional view taken on the line 4-4 of Figure 1 and shows the respective tubes of a tube bank arranged in vertical and horizontal rows;
Figure 5 is an enlarged sectional view showing the insert within an upstream end of an edge tube;
Figure 6 is a sectional view of the insert taken on the line 6-6 of Figure 5;
Figure 7 is a view similar to Figure 5 of a further insert; and
Figure 8 is a sectional view taken on the line 8-8 of Figure 7.
Similar references are applied to similar parts throughout the various views of the drawings.
Detailed Description Of The Invention
Figures 1 -8 illustrate a method for controlling the orientation of fibers within stock S flowing through and from a headbox, generally designated 10, of a papermaking machine. The method comprises the steps of generating an excess flow of the stocks, as indicated by the arrows 12 and 13, for flowing through edge tubes 14 and 16, of a tube bank, generally designated 18, relative to the flow of the stock S through the remaining tubes, such as tubes 20,21 of the tube bank 18. The arrangement as shown in Figure 2 is such that excess flow, as indicated by the arrows 12 and 13, is attained by providing the edge tubes 14 and 16 with a cross-machine directional flow area which is greater than the respective cross-machine directional flow area of each of the remaining tubes 20,21.
Stock, as indicated by the arrows 22,24 shown in Figure 3 is bled through the side walls 26 and 28 of the headbox 10 adjacent to and downstream relative to the edge tubes 14 and 16. The arrangement is such that the bleeding of the stock 22,24 through the side walls 26 and 28 compensates for any tendency for the flow of stock S from the respective edge tubes 14 and 16 to converge towards each other, as indicated by the arrow 12,13 of Figure 2, so that the orientation of fibers within the stock flowing from the headbox 10 is relatively uniform in a cross-machine direction CD.
The step of generating excess flow includes providing a replaceable insert 30 shown in Figure 5 within an upstream end 32 of each of the edge tubes, such as edge tube 14, for throttling the excess flow 12,13. The insert 30 has a cross-machine directional flow area 34, as shown in Figure 6, which is greater than the cross-machine directional flow area 36 of each of the remaining tubes, such as 20 of the tube bank 18 as shown in Figure 4.
The step of generating an excess flow also includes replacing the insert 30 with a further insert 38 having a different cross-machine directional flow area as shown in Figure 7 until the amount of stock S bled through the side walls 26 and 28 is minimal while compensating for the tendency for the flow 12,13 of stock S from the edge tubes 14 and 16 to converge.
The step of generating an excess flow includes replacing the insert 30 with the further insert 38 having a different cross-machine directional diameter d relative to the cross-machine directional diameter D of the insert 30 in order to maximize the compensation while minimizing the step of bleeding the stock through the side walls 26 and 28.
The step of bleeding includes bleeding the stock S immediately downstream relative to the edge tubes 14 and 16, respectively. The step of bleeding also includes providing bleed ports 40,42 shown in Figure 3 disposed immediately downstream from the edge tubes 14 and 16 for cooperating with the flow from each of the edge tubes 14 and 16 on both sides of the tube bank. The tube bank 18, as shown in Figure 4, includes a plurality of vertically spaced edge tubes 14,14a, 14b, 14c on a back side 26 of the tube bank 18 and a further plurality of vertically spaced edge tubes 16, 16a, 16b and 16c on a front side 28 of the tube bank 18.
The step of bleeding also includes the step of conducting the flow of the stock S bled through the front side wall 28 through a manifold 44 connected to each of the bleed tubes 46,47,48 and 49 in the front side wall 28.
Also, the step of bleeding includes conducting the further flow of stock bled through the back side wall 26 through a further manifold 50 which is connected to each of the bleed ports 51 ,52,53 and 54 in the back side wall 26.
The present invention provides a relatively simple method for controlling the orientation of fibers within stock passing through a headbox.
Once the appropriate insert for a particular type of furnish has been established with a minimum bleeding of stock through the side walls, no further adjustments should be necessary.
Claims
1 . A method for controlling the orientation of fibers within stock (S) flowing through and from a headbox (10) of a papermaking machine, said method comprising the steps of: generating an excess flow of the stock (12,13) through the edge tubes (14,16) of a tube bank (18) relative to the flow of the stock (S) through the remaining tubes (20,21 ) of the tube bank (18), such excess flow (12,13) being attained by providing the edge tubes (14,16) with a cross-machine directional flow area which is greater than the respective cross-machine directional flow areas of each of the remaining tubes (20,21 ); and bleeding stock (22,24) through the side walls (26,28) of the headbox (10) adjacent to and downstream relative to the edge tubes (14,16), the arrangement being such that the bleeding of the stock (22,24) through the side walls (26,28) compensates for any tendency for the flow of stock (S) from the respective edge tubes (14,16) to converge towards each other so that the orientation of the fibers within the stock flowing from the headbox (10) is relatively uniform in a cross-machine direction.
2. A method for controlling the orientation of fibers as set forth in claim 1 , wherein the step of generating an excess flow includes: providing a replaceable insert (30) within an upstream end (32) of each of the edge tubes (14) for throttling the excess flow (12, 13), such inserts (30) having a cross-machine directional flow area (34) greater than the cross-machine directional flow area (36) of each of the remaining tubes (20) of the tube bank (18).
3. A method for controlling the orientation of fibers as set forth in claim 2, wherein the step of generating an excess flow includes: replacing the insert (30) with a further insert (38) of a different cross-machine directional flow area until the amount of stock (S) bled through the side walls (26,28) is minimal while compensating for the tendency for the stock flowing (1 2,1 3) from the edge tubes (14,1 6) to converge.
4. A method for controlling the orientation of fibers as set forth in claim 3, wherein the step of generating an excess flow includes: replacing the insert (30) with the further insert (38), the further insert (38) having a different cross-machine directional diameter (d) relative to the cross-machine directional diameter (D) of the insert (30) in order to maximize the compensation while minimizing the step of bleeding the stock through the side walls (26,28).
5. A method for controlling the orientation of fibers as set forth in claim 1 , wherein the step of bleeding includes: bleeding the stock (S) immediately downstream relative to the edge tubes (1 ,1 6).
6. A method for controlling the orientation of fibers as set forth in claim 5, wherein the step of bleeding includes: providing a plurality of bleed ports (40,42) immediately downstream relative to the edge tubes (14, 1 6), such plurality of bleed ports (40,42) cooperating with the flow from each of the edge tubes (14, 1 6) on both sides of the tube bank, the tube bank (1 8) including a plurality of vertically spaced edge tubes (16,16a,16b,16c) on a front side (28) of the tube bank (18) and a further plurality of vertically spaced edge tubes (14,14a, 14b, 14c) on a back side (26) of the tube bank (18).
7. A method for controlling the orientation of fibers as set forth in claim 6, wherein the step of bleeding further includes the step of: conducting the flow of the stock (S) bled through the front side wall (28) through a manifold (44) connected to each of the bleed ports (46,47,48,49) on the front side wall (28); conducting the further flow of stock bled through the back side wall (26) through a further manifold (50) connected to each of the bleed ports (51 ,52,53,54) in the back side wall (26).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12350193A | 1993-09-17 | 1993-09-17 | |
| US08/123,501 | 1993-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1995008024A1 true WO1995008024A1 (en) | 1995-03-23 |
Family
ID=22409044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1994/009279 Ceased WO1995008024A1 (en) | 1993-09-17 | 1994-08-17 | A method for controlling the orientation of fibers |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1995008024A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632672A1 (en) * | 1996-08-14 | 1998-02-19 | Voith Sulzer Papiermasch Gmbh | Process for distributing the stock flowing through a paper machine head box |
| EP2063020A4 (en) * | 2006-09-05 | 2012-04-25 | Yokogawa Electric Corp | SIMULATION METHOD, FIBER ORIENTATION CONTROL METHOD, AND FIBER ORIENTATION CONTROL DEVICE |
| DE102011084779A1 (en) | 2010-10-28 | 2012-05-10 | Metso Paper, Inc. | Hydraulic head box for fiber web manufacturing machine, has throttling bushes rotated around longitudinal axis of manifold to regulate pressure loss of fiber suspension flow during turning of flow into manifold |
| WO2020049308A1 (en) | 2018-09-05 | 2020-03-12 | Strix Limited | Control arrangements for liquid heating appliances |
| EP4046550A1 (en) | 2018-02-23 | 2022-08-24 | Strix Limited | Thermally sensitive controls |
| WO2024149896A1 (en) | 2023-01-13 | 2024-07-18 | Strix Limited | Thermally sensitive control |
| WO2024213882A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliances with liquid temperature monitoring |
| WO2024213881A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliance with bypass electrical power supply circuit |
| WO2024213879A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliance with screw-free fastening of a control unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148674A (en) * | 1965-08-04 | 1969-04-16 | Beloit Corp | Improvements in a headbox of a papermaking machine |
| EP0445564A1 (en) * | 1990-02-26 | 1991-09-11 | Mitsubishi Jukogyo Kabushiki Kaisha | Method for regulating flow directions of a headbox in a paper machine |
| EP0471194A1 (en) * | 1990-08-14 | 1992-02-19 | Voith Sulzer Papiermaschinen GmbH | Process for controlling the flow in a headbox |
-
1994
- 1994-08-17 WO PCT/US1994/009279 patent/WO1995008024A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1148674A (en) * | 1965-08-04 | 1969-04-16 | Beloit Corp | Improvements in a headbox of a papermaking machine |
| EP0445564A1 (en) * | 1990-02-26 | 1991-09-11 | Mitsubishi Jukogyo Kabushiki Kaisha | Method for regulating flow directions of a headbox in a paper machine |
| EP0471194A1 (en) * | 1990-08-14 | 1992-02-19 | Voith Sulzer Papiermaschinen GmbH | Process for controlling the flow in a headbox |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19632672A1 (en) * | 1996-08-14 | 1998-02-19 | Voith Sulzer Papiermasch Gmbh | Process for distributing the stock flowing through a paper machine head box |
| EP2063020A4 (en) * | 2006-09-05 | 2012-04-25 | Yokogawa Electric Corp | SIMULATION METHOD, FIBER ORIENTATION CONTROL METHOD, AND FIBER ORIENTATION CONTROL DEVICE |
| DE102011084779A1 (en) | 2010-10-28 | 2012-05-10 | Metso Paper, Inc. | Hydraulic head box for fiber web manufacturing machine, has throttling bushes rotated around longitudinal axis of manifold to regulate pressure loss of fiber suspension flow during turning of flow into manifold |
| EP4046550A1 (en) | 2018-02-23 | 2022-08-24 | Strix Limited | Thermally sensitive controls |
| WO2020049308A1 (en) | 2018-09-05 | 2020-03-12 | Strix Limited | Control arrangements for liquid heating appliances |
| WO2024149896A1 (en) | 2023-01-13 | 2024-07-18 | Strix Limited | Thermally sensitive control |
| WO2024213882A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliances with liquid temperature monitoring |
| WO2024213881A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliance with bypass electrical power supply circuit |
| WO2024213879A1 (en) | 2023-04-13 | 2024-10-17 | Strix Limited | Liquid heating appliance with screw-free fastening of a control unit |
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