GB2197886A - Resilient felt base structure - Google Patents
Resilient felt base structure Download PDFInfo
- Publication number
- GB2197886A GB2197886A GB08726829A GB8726829A GB2197886A GB 2197886 A GB2197886 A GB 2197886A GB 08726829 A GB08726829 A GB 08726829A GB 8726829 A GB8726829 A GB 8726829A GB 2197886 A GB2197886 A GB 2197886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yarns
- machine direction
- felt
- cross
- resilient
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 206010016807 Fluid retention Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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
- D21F1/0027—Screen-cloths
Landscapes
- Paper (AREA)
Description
2197886 - 1 Resilient Felt Base Structure This invention relates to
fabrics used in papermaking and more particularly to a felt base used in the wet section of a Fourdrinier papermaking machine.
Felts used in papermaking machines undergo severe mechanical stresses such as cyclical pressure and vacuum changes, as well as extreme changes in humidity and temperature. Despite these changes, the felt must maintain its flexibility, durability, compaction resistance, dimensional stability and water resistability throughout its useful life. Various felts have been made comprising both woven and non-woven materials, however none of them has been found to be completely satisfactory.
An object of the present invention is to provide a felt capable of maintaining its durability and resistance to compaction through its useful life.
Another object is to provide a felt without "knuckles" to increase its wear resistance by decreasing the possibility of mechanical failures.
A further object is to provide a single layer base felt which has the water-retention and durability properties of a multilayered structure.
The present invention provides a felt for dewatering paper webs comprising:
a plurality of resilient yarns extending in the machine direction; is a plurality of high strength, low resilience yarns extending in the machine direction and interleaved with said resilient yarns; and a first plurality of cross-machine direction yarns interwoven with said machine direction yarns in long floats.
The felt may further comprise a second plurality of relatively small diameter cross-machine yarns interwoven with said mach ine direction yarns.
Preferably, each of said first plurality of cross- machine yarns engages only the resilient machine direction yarns. Advantageously, said first plurality of crossmachine direction yarns are arranged and disposed on one side of said high strength machine direction yarns.
BY way of example, an embodiment of the invention will be described with reference to the accompanying drawings, in which:
Fig. 1 shows an isometric view of a felt constructed according to the invention, and Fig. 2 is a cross-sectional view of Fig. 1 taken in the cross-machine direction.
As shown in the figures, a felt 10 comprises a plurality of yarns 12, 14 extending in the machine direction. Two kinds of yarns are used in this direction: an elasto meric yarn 12 which is a very resilient composite yarn adapted to deform when subjected to shear or normal forces or to stretch when subjected to tension; and a high strength, 4 I 1, relatively non-resilient, load bearing yarn 14. The two types of yarns are alternated, as shown, preferably with each load bearing yarn 14 being disposed between two resilient yarns 12 and vice versa. However, other variations are also possible. For example two or more resilient yarns could be alternated with, one, two or more load bearing yarns.
The cross-machine system which binds the longitudinal (ie machine direction) yarns comprises a plied monofilament yarn 16 which is woven in long floats spanning between 6 and 12 longitudinal yarns to form highly directional drainage channels for the water being expressed during paper manufacturing. Importantly each yarn 16 engages, or is wrapped around the resilient yarns 12, so that all of the yarns 16 lie on the same side of all the high strength longitudinal yarns 14. Preferably, in order to improve the dimensional stability of the assembly a relatively small diameter, high strength yarn 18 is woven in the cross-machine direction as shown. These yarns 18 thus bind together the longitudinal yarns 12, 14 while maintaining them co-planar. However yarns 18 may be omitted.
The resulting felt has a number of characteristics which are desirable in the papermaking art. Since the long-float yarns 16 engage only the resilient yarns 12, any pressure applied to the cross-over points between these yarns such as 20, forces the cross-machine yarn down so that the cross-over point becomes even with the top surface 22 of the longitudinal yarns (see Fig. 2). Thus by deliberately-miniTnizing yarn cross-over points (knuckles), a quasi-crossless structure has been achieved which behaves like a multi-layered structure. Furthermore since the cross- over knuckles are eliminated, the felt forms a uniform pressing surface.
In addition, this structure provides a uniform pressure distribution and is less prone to cross-direction yarn failure caused by flex fatigue at the cross-over points.
The cross-machine yarns 16 also generate a platform for the machine direction yarns 12, 14 resulting in a structure having a high resistance to permanent deform- is ation due to repetitive compressive loading. Furthermore the platform allows the felt to maintain its nominal caliper for a long period of time.
The long floats as previously mentioned provide crossmachine drainage channels thereby improving the dewatering capabilities of the felt. The small sized cross-machine multifilaments 18 do not interfere with the water handling and drainage functions, but are instrumental in holding the yarns together and maintaining the dimensional stability of the felt.
-1 "Q 1
Claims (5)
- Claims:A felt for dewatering paper webs comprising: a plurality of resilient yarns extending in the machine direction; a plurality of high strength, low resilience yarns extending in the machine direction and interleaved with said resilient yarns; and a first plurality of cross-machine direction yarns interwoven with said machine direction yarns in long floats.
- 2. The felt of claim 1, further comprising a second plurality of relatively small diameter cross-machine yarns interwoven with said machine direction yarns.
- 3. The felt of claim 1 or claim 2, wherein each of said first plurality of cross-machine yarns engages only the resilient machine direction yarns.
- 4. The felt of any one of the preceding claims, wherein said first plurality of cross-machine direction yarns are arranged and disposed on one side of said high strength machine direction yarns.
- 5. A felt for dewatering paper webs, substantially as described herein with reference to, and as shown in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93245686A | 1986-11-18 | 1986-11-18 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8726829D0 GB8726829D0 (en) | 1987-12-23 |
| GB2197886A true GB2197886A (en) | 1988-06-02 |
| GB2197886B GB2197886B (en) | 1990-05-02 |
Family
ID=25462355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8726829A Expired - Fee Related GB2197886B (en) | 1986-11-18 | 1987-11-17 | Gb8726829.8elt base structure |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS63145498A (en) |
| BR (1) | BR8703325A (en) |
| DE (1) | DE3723750A1 (en) |
| FI (1) | FI873100A (en) |
| FR (1) | FR2606800A1 (en) |
| GB (1) | GB2197886B (en) |
| IT (1) | IT1206040B (en) |
| NL (1) | NL8701763A (en) |
| SE (1) | SE8703725L (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010141319A1 (en) | 2009-06-05 | 2010-12-09 | Albany International Corp. | Ultra-resilient fabric |
| WO2012100161A1 (en) | 2011-01-21 | 2012-07-26 | Albany International Corp. | Ultra-resilient fabric and method of making thereof |
| CN105308238A (en) * | 2013-03-15 | 2016-02-03 | 阿尔巴尼国际公司 | Industrial fabric comprising an extruded mesh and method of making thereof |
| US9545773B2 (en) | 2013-03-15 | 2017-01-17 | Albany International Corp. | Pad comprising an extruded mesh and method of making thereof |
| US10590568B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient fabric |
| US10588375B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient pad |
| US10590571B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient pad |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10139629A1 (en) * | 2001-08-11 | 2003-02-20 | Voith Paper Patent Gmbh | Press blanket, to carry a wet web through a press station, has at least one layer of longitudinal reinforcement filament to prevent a longitudinal stretch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149571A (en) * | 1978-03-03 | 1979-04-17 | Huyck Corporation | Papermaking fabrics |
-
1987
- 1987-06-16 IT IT8748061A patent/IT1206040B/en active
- 1987-06-30 BR BR8703325A patent/BR8703325A/en unknown
- 1987-07-13 FI FI873100A patent/FI873100A/en not_active Application Discontinuation
- 1987-07-17 DE DE19873723750 patent/DE3723750A1/en not_active Withdrawn
- 1987-07-27 NL NL8701763A patent/NL8701763A/en not_active Application Discontinuation
- 1987-07-29 JP JP62187866A patent/JPS63145498A/en active Pending
- 1987-09-28 SE SE8703725A patent/SE8703725L/en not_active Application Discontinuation
- 1987-11-05 FR FR8715361A patent/FR2606800A1/en not_active Withdrawn
- 1987-11-17 GB GB8726829A patent/GB2197886B/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10590568B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient fabric |
| US10590571B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient pad |
| US10588375B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient pad |
| US10590569B2 (en) | 2007-12-28 | 2020-03-17 | Albany International Corp. | Ultra-resilient fabric |
| WO2010141319A1 (en) | 2009-06-05 | 2010-12-09 | Albany International Corp. | Ultra-resilient fabric |
| EP2993263A1 (en) | 2011-01-21 | 2016-03-09 | Albany International Corp. | Ultra-resilient fabric |
| US8535484B2 (en) | 2011-01-21 | 2013-09-17 | Albany International Corp. | Ultra-resilient fabric and method of making thereof |
| WO2012100161A1 (en) | 2011-01-21 | 2012-07-26 | Albany International Corp. | Ultra-resilient fabric and method of making thereof |
| US9545773B2 (en) | 2013-03-15 | 2017-01-17 | Albany International Corp. | Pad comprising an extruded mesh and method of making thereof |
| CN105308238B (en) * | 2013-03-15 | 2018-07-13 | 阿尔巴尼国际公司 | Technical fabric including bi-component mesh and its manufacturing method |
| US10041210B2 (en) | 2013-03-15 | 2018-08-07 | Albany International Corp. | Industrial fabric comprising an extruded mesh and method of making thereof |
| US10173391B2 (en) | 2013-03-15 | 2019-01-08 | Albany International Corp. | Pad comprising an extruded mesh and method of making thereof |
| US9352530B2 (en) | 2013-03-15 | 2016-05-31 | Albany International Corp. | Industrial fabric comprising an extruded mesh and method of making thereof |
| CN105308238A (en) * | 2013-03-15 | 2016-02-03 | 阿尔巴尼国际公司 | Industrial fabric comprising an extruded mesh and method of making thereof |
| US10786970B2 (en) | 2013-03-15 | 2020-09-29 | Albany International Corp. | Pad comprising an extruded mesh and method of making thereof |
| US10934663B2 (en) | 2013-03-15 | 2021-03-02 | Albany International Corp. | Industrial fabric comprising an extruded mesh and method of making thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1206040B (en) | 1989-04-05 |
| IT8748061A0 (en) | 1987-06-16 |
| SE8703725D0 (en) | 1987-09-28 |
| FR2606800A1 (en) | 1988-05-20 |
| JPS63145498A (en) | 1988-06-17 |
| FI873100A (en) | 1988-05-19 |
| GB2197886B (en) | 1990-05-02 |
| BR8703325A (en) | 1988-06-14 |
| SE8703725L (en) | 1988-05-19 |
| DE3723750A1 (en) | 1988-05-26 |
| GB8726829D0 (en) | 1987-12-23 |
| NL8701763A (en) | 1988-06-16 |
| FI873100A0 (en) | 1987-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |