WO2003027389A1 - Apparatus, system and method for transferring a running web - Google Patents
Apparatus, system and method for transferring a running web Download PDFInfo
- Publication number
- WO2003027389A1 WO2003027389A1 PCT/US2002/024683 US0224683W WO03027389A1 WO 2003027389 A1 WO2003027389 A1 WO 2003027389A1 US 0224683 W US0224683 W US 0224683W WO 03027389 A1 WO03027389 A1 WO 03027389A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- running web
- auxiliary
- vacuum
- web
- primary
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/14—Making cellulose wadding, filter or blotting paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F2/00—Transferring webs from wet ends to press sections
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G9/00—Other accessories for paper-making machines
- D21G9/0063—Devices for threading a web tail through a paper-making machine
Definitions
- Modern machinery for processing running webs into paper products employs a vacuum applied to the running web to adhere the running web to a moving carrier fabric.
- Several carrier fabrics may coordinate together, and each carrier fabric typically moves in an endless loop.
- the running web is transferred from one carrier fabric to another carrier fabric during the papermaking process, beginning at a headbox slurry and ending with a finished product of one or more layers.
- the amount of vacuum that must be applied to tightly adhere a running web to a moving carrier fabric varies.
- the vacuum must be great enough to ensure reliable transfer, but not so great as to damage the product. For example, if the level of vacuum is too high, undesirable holes or defects may be formed in the running web.
- the apparatus used to transfer a running web from one moving carrier fabric to another is commonly called a "pick up box", or "box.”
- the reservoir or manifold connected to the "box” employing a vacuum is sometimes called a "vacuum box.”
- Vacuum boxes typically have been oriented across the entire width (i.e. cross direction) of a running web. Pick up boxes apply a vacuum force to rapidly and securely pull a running web from a first fabric to a second fabric.
- a vacuum apparatus for a papermaking machine is provided in one embodiment.
- the papermaking machine provides at least a first and second carrier fabric, said first and second carrier fabrics each having a machine direction and a cross direction perpendicular to the machine direction.
- a running web is provided for travel on the apparatus, the running web being adapted to proceed in the machine direction.
- the running web includes a width in the cross direction, the running web being bounded by a first edge and a second edge.
- a primary head is positioned adjacent to and in fluid communication with the running web.
- a primary vacuum box may be joined to the primary head, the primary vacuum box having on its interior a first region of reduced air pressure.
- the primary vacuum box may extend in the cross direction and can be adapted for applying reduced air pressure to the primary head for application to the running web in transferring the web from the first carrier fabric to the second carrier fabric.
- a first auxiliary head also may be positioned adjacent to and in fluid communication with the first edge of the running web. Furthermore, an auxiliary vacuum box is joined to said first auxiliary head, the auxiliary vacuum box having an auxiliary region of reduced air pressure, the auxiliary vacuum box extending in the cross direction. The auxiliary vacuum box is adapted for applying reduced air pressure to the first auxiliary head for application to at least the first edge of the running web.
- a second auxiliary head is provided and is adapted for applying reduced air pressure.
- the first auxiliary head is applied to a first edge of the running or carrier fabric, while the second auxiliary head is applied to a second edge of the carrier fabric.
- auxiliary vacuum boxes may be applied in essentially any location where edges of a running web must be stabilized against a carrier fabric.
- a system also is provided for transferring a running web from a first carrier fabric to a second carrier fabric.
- the system includes a running web having a cross direction extending from a first edge to a second edge.
- the running web is configured for traveling in a machine direction from an upstream end of the manufacturing process to the downstream end of the process.
- a primary head is positioned adjacent to and in fluid communication with the running web.
- the primary head includes a primary contact means for application to the running web, the primary contact means extending in the cross direction of the running web.
- the primary contact means forms a vacuum slot adjacent to the running web.
- a primary vacuum box is joined to the primary head, the primary vacuum box having an interior region of reduced air pressure.
- the primary vacuum box is adapted for applying reduced air pressure to the vacuum slot of the primary contact means for application to the running web to transfer the running web from the first carrier fabric to the second carrier fabric.
- the first auxiliary head may be positioned downstream from the primary head.
- the first auxiliary head includes a first auxiliary contact means extending in the cross direction of the running web and in contact with the running web.
- the first auxiliary head typically is provided adjacent to and in fluid communication with the first edge of the running web.
- a first auxiliary vacuum box is joined to the first auxiliary head.
- the first auxiliary vacuum box includes an auxiliary region of reduced air pressure.
- the auxiliary vacuum box is adapted for applying reduced air pressure to the auxiliary contact means for application to the first edge of the running web.
- the auxiliary contact means comprises two lips having a vacuum slot between the lips. In such applications, the lips are applied to the surface of the carrier fabric to pull a vacuum through the fabric, thereby adhering the running web to the carrier fabric.
- a process also is provided for manufacturing paper from a web in a papermaking machine.
- the process includes applying a first suction force at a first point on the web, and a second suction force at a second point which is downstream from the first suction force. These forces, acting together, transfer the web from the first carrier fabric to a second carrier fabric.
- the second suction force is applied to the first and second edges of the web, thereby completing transfer the web from a first carrier fabric to a second carrier fabric.
- Figure 1 is an overview of a portion of the apparatus employed to produce paper products such as tissue, paper toweling and the like from a paper slurry;
- Figure 2 reveals a closer side view of the vacuum apparatus employed in transferring a running web from a first carrier fabric to a second carrier fabric in the manufacture of web-based products;
- Figure 3 shows a portion of an end view of the apparatus shown in Figure 2, in which the first edge 46 of the running web 30 is shown in relation to the vacuum apparatus;
- Figure 4 is a machine directional view of the entire apparatus. Detailed Description of the Invention
- the application of the invention of this application facilitates the use of relatively low transfer vacuum levels when using a pick-up shoe or vacuum box to transfer a web onto a highly topographical fabric.
- Many carrier fabrics used in uncreped through-air-dried (“UCTAD") processes provide a relatively high degree of topography on the surface of the fabric that contributes to the need for improved efficiency in the vacuum transfer process.
- the invention may assist in avoiding transfer difficulty, especially difficulty that occurs at the edges of the running web when an attempt is made to transfer at relatively low levels of vacuum.
- the application of the invention facilitates the use of lower levels of vacuum, which may result in a superior product, reduced energy costs, or more reliable production of product.
- the use of auxiliary pick-up boxes positioned at one or more edges of the running web facilitates a relatively clean and reliable transfer of the entire running web from one carrier fabric to another.
- machine direction refers to that direction which is parallel to the flow of the running paper web through the equipment.
- cross-direction or "CD”
- machine direction and cross direction are indicated by arrows in several Figures of the application, described below.
- any carrier fabric may be used in the application of the invention. Transfer of a running web typically occurs when centripetal acceleration or air pressure applied from a transfer head causes the web to move from one carrier fabric to another carrier fabric.
- the invention provides particular assistance when using carrier fabrics that have a topography or uneven feature on the surface of the carrier fabric.
- a fabric having a relatively high permeability to fluids such as water and air is typically used in the practice of the invention.
- Any papermaking belt suitable for use in a through-drying process, or UCTAD process may be utilized in the practice of the invention. For example, papermaking belts such as those shown in United States Patent Nos. 4,529,480; 4,514,345; 4,637,859; and 5,334,289 may be employed in the practice of the invention.
- Topographical fabrics that may be employed in the practice of the invention may be supplied by various manufacturers such as Voith Fabrics, Asten, and others. Many types of fabric can be employed in the practice of the invention.
- a pressure at the primary head of the vacuum box of no more than about 8.5 inches of Mercury.
- a pressure at the primary head of the vacuum box of no more than about 8.5 inches of Mercury.
- a papermaking apparatus 11 comprising a former 13, which receives a paper slurry from headbox 12.
- a sheet is formed as the former 13 proceeds in the machine direction 21 as shown in the right side of Figure 1.
- Vacuum apparatus 15 transfers the sheet which is being formed (not shown) to the first carrier fabric 14.
- the running web proceeds along the direction arrow 23 to the vacuum apparatus 16, which transfers the running web to a second carrier fabric 17.
- the machine direction 22 is shown by reference to the arrow 29.
- the dryer 18, is the structure around which the second carrier fabric 17 travels in drying the running web.
- a dryer hood 19 is shown over the top portion of the dryer 18.
- a product 20 emerging from the papermaking apparatus 11 as shown on the left side of Figure 1.
- the vacuum apparatus 16 of Figure 1 is shown in greater detail.
- the first carrier fabric 14 carries the running web 30 along the machine direction 28 to the transfer zone 35. It is in the transfer zone 35 that the running web 30 is transferred from the first carrier fabric 14 to the second carrier fabric 17.
- the transfer is accomplished by applying vacuum pressure or a suction force which moves the running web 30 from the surface of the first carrier fabric 14 and to the surface of the second carrier fabric 17.
- a primary head 25 or primary contact means applies air pressure between a first lip 33 and a second lip 34.
- the "upstream" end of the process is indicated at 31
- the "downstream" end of the process is indicated at 32.
- a primary vacuum box 27 having a region 26 of reduced air pressure is shown on the left side of Figure 2.
- the reduced air pressure in region 26 is applied to the vacuum slot 42 which is located between the first lip 33 and the second lip 34.
- auxiliary head 36 Further downstream from the primary head 25 is the auxiliary head 36.
- the auxiliary head 36 assists in pulling by vacuum force, the edges of the running web 30 from the first carrier fabric 14 to the second carrier fabric 17 to effect a complete and reliable transfer.
- the distance between the auxiliary head 36 and the primary head 25 is about 5 or 6 inches. However, in other applications of the invention it might be possible to provide such a distance which is less than one inch or as great as 1 or 2 feet, or even more.
- An auxiliary vacuum box 37 is fluidly connected to the auxiliary head 36.
- a vacuum supply tube inlet 38 is shown, having an auxiliary region 40 of reduced air pressure which is seen in Figure 2.
- a mounting bracket 39 supports the auxiliary vacuum box 37, and in this particular embodiment, connects it to the primary vacuum box 27 for support. Other mounting arrangements are possible in the practice of the invention.
- a portion of the dryer 18 may be seen in the upper left portion of Figure 2.
- Figure 3 is an end view of the apparatus shown in Figure 2.
- Figure 3 only shows, however, a portion of the apparatus of Figure 2, and in particular it shows the first edge 46 of the running web 30.
- the running web 30 is moving from the bottom of Figure 3 towards the top of Figure 3, along the pathway 29 of the running web 30.
- the arrow indicated as pathway 29 is in the machine direction.
- the auxiliary vacuum box 37 is shown near the center of Figure 3, and comprises first lip 47 and second lip 48 which are directly in contact with the underside of the running web 30.
- the primary vacuum box 27 pulls air through a first auxiliary contact means such as a vacuum slot 42, which is bounded by first lip 33 and second lip 34, which extend essentially the full width of the running web 30.
- a first auxiliary contact means such as a vacuum slot 42, which is bounded by first lip 33 and second lip 34, which extend essentially the full width of the running web 30.
- two separate auxiliary vacuum boxes 37 will be supplied, one on the first edge 46 of the running web 30, and another on the second edge (not shown in Figure 3) of the running web.
- the air flow or suction force applied through the running web 30 proceeds into the auxiliary vacuum box 37, and moves along arrows 45a-c, as shown in Figure 3, from right to left in the Figure.
- the air moves along vacuum supply tube inlet 38.
- the auxiliary region 40 of reduced air pressure is shown as well, and primary vacuum box 27 is shown in Figure 3 having region 26 of reduced air pressure.
- the cross direction (CD) of the running web is shown extending from the left margin to the
- the width of the vacuum slot 50 in the auxiliary head 36 which is bounded by first lip 47 and first lip 48, may be varied. Deckle strips (not shown) are usually employed upon the vacuum slot 50. However, a slot width of about 0.75 inches is believed to be acceptable but could be as great as 4-6 inches or as little as 0.2 inches, depending upon the application. A width of between 0.5 and 1.5 inches is desirable. A length of the slot which corresponds to about 1 foot in the cross direction 49 may be used. However, there is no practical limit on the slot length, and the vacuum slot 50 could extend the entire width of the running web 30, or instead be abbreviated to only a portion of the cross directional distance, as along the edge of running web 30, as shown in Figures 3-4. A slot length of between 6 inches and two feet is desirable.
- the level of vacuum that must be employed to correctly and reliably transfer the running web 30, while still avoiding damage to the running web 30, will vary depending upon the particular application. However, it is believed that vacuum levels of about 6 inches of Mercury may be employed in some applications, while other applications may permit a reduced vacuum level of less than 6 inches, such as 4 inches or perhaps even as low as 2 inches, depending upon the fabric used and the processing conditions.
- the region 26 of reduced air pressure and the auxiliary region 40 of reduced air pressure may be in fluid communication, and may be pumped to a vacuum using the same apparatus. However, depending upon the configuration, is also possible for these two regions to be separate, and not in fluid communication, and therefore capable of imparting differing pressure values concurrently.
- One means that could be employed to provide a pressure drop would be to use a valve or valve assembly (not shown).
- FIG 4 a cross-directional width of the vacuum apparatus 16 is shown with both the left and right sides of the apparatus displayed.
- a vacuum supply tube inlet 38 is fluidly connected to the auxiliary vacuum box 37.
- a vacuum supply tube inlet 60 is fluidly connected to the second auxiliary vacuum box 57.
- a second auxiliary head 58 is connected to the second auxiliary vacuum box 57, and is applied to the second edge 53 of the running web 30.
- the auxiliary head 36 is applied to the first edge 46 of the running web, as previously shown in Figure 3.
- Figure 4 also shows the auxiliary region of reduced air pressure 40 on the left side of the Figure, and the auxiliary region of reduced air pressure 59 within the vacuum supply tube inlet 60.
- the first lip 33 and second lip 34 form the primary vacuum means which extends essentially the full width along the cross direction 61 of the running web (running web not shown in Figure 4).
- the first lip 33 and second lip 34 are applied directly to the surface of the running web 30 (running web 30 not shown in Figure 4) in applying a vacuum to the running web 30.
- a vacuum slot 42 is located between the first lip 33 and the second lip 34.
- a primary vacuum box 27 is shown which is in fluid connection with the first lip 33 and second lip 34 of the vacuum apparatus 16. t is understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only, and is not intended as limiting the broader aspects of the present invention, which broader aspects are embodied in the exemplary constructions.
- the invention is shown by example in the appended claims, but is not limited to the specific features recited in the claims.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002453334A CA2453334A1 (en) | 2001-09-26 | 2002-08-01 | Apparatus, system and method for transferring a running web |
AU2002362554A AU2002362554C1 (en) | 2001-09-26 | 2002-08-01 | Apparatus, system and method for transferring a running web |
MXPA04001897A MXPA04001897A (en) | 2001-09-26 | 2002-08-01 | Apparatus, system and method for transferring a running web. |
EP02752682A EP1436460A1 (en) | 2001-09-26 | 2002-08-01 | Apparatus, system and method for transferring a running web |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/964,280 | 2001-09-26 | ||
US09/964,280 US6733634B2 (en) | 2001-09-26 | 2001-09-26 | Apparatus, system and method for transferring a running web |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003027389A1 true WO2003027389A1 (en) | 2003-04-03 |
Family
ID=25508351
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/024683 WO2003027389A1 (en) | 2001-09-26 | 2002-08-01 | Apparatus, system and method for transferring a running web |
Country Status (6)
Country | Link |
---|---|
US (1) | US6733634B2 (en) |
EP (1) | EP1436460A1 (en) |
AU (1) | AU2002362554C1 (en) |
CA (1) | CA2453334A1 (en) |
MX (1) | MXPA04001897A (en) |
WO (1) | WO2003027389A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004038769A1 (en) * | 2004-08-09 | 2006-02-23 | Voith Fabrics Patent Gmbh | Device for web stabilization |
US11318509B2 (en) * | 2017-11-06 | 2022-05-03 | Air Systems Design, Inc. | Dust hood |
US10895040B2 (en) | 2017-12-06 | 2021-01-19 | The Procter & Gamble Company | Method and apparatus for removing water from a capillary cylinder in a papermaking process |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4440597A (en) * | 1982-03-15 | 1984-04-03 | The Procter & Gamble Company | Wet-microcontracted paper and concomitant process |
US4757619A (en) * | 1985-05-13 | 1988-07-19 | Thermo Electron Web Systems, Inc. | Suction transfer system for high speed paper dryer |
EP0617164A1 (en) * | 1993-03-24 | 1994-09-28 | Kimberly-Clark Corporation | Method for making smooth uncreped throughdried sheets |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
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US1279170A (en) * | 1918-01-28 | 1918-09-17 | David F Sullivan | Suction-box and cover. |
GB1530246A (en) * | 1976-04-14 | 1978-10-25 | Valmet Oy | Method of and means for detaching and conducting a paper web in a paper-making machine |
US5152078A (en) | 1987-02-13 | 1992-10-06 | Beloit Corporation | Vacuum roll transfer apparatus |
US4980979A (en) | 1987-02-13 | 1991-01-01 | Beloit Corporation | Vacuum roll transfer apparatus |
DE3739338C2 (en) * | 1987-11-20 | 1995-09-07 | Voith Gmbh J M | Air guide box for stabilizing the running of a web, in particular a paper web |
US6090243A (en) | 1989-07-24 | 2000-07-18 | Corbellini; Glauco | Process for preparing a web of paper fibers |
US4960333A (en) * | 1989-10-16 | 1990-10-02 | The Torrington Company | Antifriction bearing assembly speed sensor |
US5098522A (en) | 1990-06-29 | 1992-03-24 | The Procter & Gamble Company | Papermaking belt and method of making the same using a textured casting surface |
US5904811A (en) | 1993-12-20 | 1999-05-18 | The Procter & Gamble Company | Wet pressed paper web and method of making the same |
US5609728A (en) * | 1995-03-24 | 1997-03-11 | James River Corporation Of Virginia | Method and apparatus for transferring a web from a forming wire to a transferring felt in a paper making machine |
US6083346A (en) | 1996-05-14 | 2000-07-04 | Kimberly-Clark Worldwide, Inc. | Method of dewatering wet web using an integrally sealed air press |
US6143135A (en) | 1996-05-14 | 2000-11-07 | Kimberly-Clark Worldwide, Inc. | Air press for dewatering a wet web |
US6149767A (en) | 1997-10-31 | 2000-11-21 | Kimberly-Clark Worldwide, Inc. | Method for making soft tissue |
US6096169A (en) | 1996-05-14 | 2000-08-01 | Kimberly-Clark Worldwide, Inc. | Method for making cellulosic web with reduced energy input |
US5830321A (en) | 1997-01-29 | 1998-11-03 | Kimberly-Clark Worldwide, Inc. | Method for improved rush transfer to produce high bulk without macrofolds |
US5741402A (en) * | 1996-09-03 | 1998-04-21 | The Procter & Gamble Company | Vacuum apparatus having plurality of vacuum sections for controlling the rate of application of vacuum pressure in a through air drying papermaking process |
US5885421A (en) * | 1996-09-03 | 1999-03-23 | The Procter & Gamble Company | Vacuum apparatus for having textured clothing for controlling rate of application of vacuum pressure in a through air drying papermaking process |
US5744007A (en) | 1996-09-03 | 1998-04-28 | The Procter & Gamble Company | Vacuum apparatus having textured web-facing surface for controlling the rate of application of vacuum pressure in a through air drying papermaking process |
US5776311A (en) | 1996-09-03 | 1998-07-07 | The Procter & Gamble Company | Vacuum apparatus having transitional area for controlling the rate of application of vacuum in a through air drying papermaking process |
US5718806A (en) * | 1996-09-03 | 1998-02-17 | The Procter & Gamble Company | Vacuum apparatus having flow management device for controlling the rate of application of vacuum pressure in a through air drying papermaking process |
FI110702B (en) * | 1996-09-06 | 2003-03-14 | Metso Paper Inc | Method and arrangement in the forming section of the web to prevent rewetting of the web |
US5725734A (en) * | 1996-11-15 | 1998-03-10 | Kimberly Clark Corporation | Transfer system and process for making a stretchable fibrous web and article produced thereof |
FI965277A (en) * | 1996-12-31 | 1998-07-01 | Valmet Corp | Suction box in a paper machine and procedure in the suction box of the paper machine |
-
2001
- 2001-09-26 US US09/964,280 patent/US6733634B2/en not_active Expired - Lifetime
-
2002
- 2002-08-01 WO PCT/US2002/024683 patent/WO2003027389A1/en not_active Application Discontinuation
- 2002-08-01 CA CA002453334A patent/CA2453334A1/en not_active Abandoned
- 2002-08-01 MX MXPA04001897A patent/MXPA04001897A/en unknown
- 2002-08-01 EP EP02752682A patent/EP1436460A1/en not_active Withdrawn
- 2002-08-01 AU AU2002362554A patent/AU2002362554C1/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4440597A (en) * | 1982-03-15 | 1984-04-03 | The Procter & Gamble Company | Wet-microcontracted paper and concomitant process |
US4757619A (en) * | 1985-05-13 | 1988-07-19 | Thermo Electron Web Systems, Inc. | Suction transfer system for high speed paper dryer |
EP0617164A1 (en) * | 1993-03-24 | 1994-09-28 | Kimberly-Clark Corporation | Method for making smooth uncreped throughdried sheets |
Also Published As
Publication number | Publication date |
---|---|
MXPA04001897A (en) | 2004-06-15 |
US6733634B2 (en) | 2004-05-11 |
AU2002362554C1 (en) | 2008-07-03 |
US20030056926A1 (en) | 2003-03-27 |
AU2002362554B2 (en) | 2008-01-17 |
CA2453334A1 (en) | 2003-04-03 |
EP1436460A1 (en) | 2004-07-14 |
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