AU605261B2 - Improvements to papermachine and like clothing - Google Patents
Improvements to papermachine and like clothing Download PDFInfo
- Publication number
- AU605261B2 AU605261B2 AU13271/88A AU1327188A AU605261B2 AU 605261 B2 AU605261 B2 AU 605261B2 AU 13271/88 A AU13271/88 A AU 13271/88A AU 1327188 A AU1327188 A AU 1327188A AU 605261 B2 AU605261 B2 AU 605261B2
- Authority
- AU
- Australia
- Prior art keywords
- fabric
- yarns
- warp
- face
- layer
- 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
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
- D21F1/0027—Screen-cloths
- D21F1/0036—Multi-layer screen-cloths
- D21F1/0045—Triple layer fabrics
Landscapes
- Paper (AREA)
- Woven Fabrics (AREA)
- Toys (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Sanitary Thin Papers (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Undergarments, Swaddling Clothes, Handkerchiefs Or Underwear Materials (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Abstract
A papermakers wet felt is proposed which comprises a flat woven duplex fabric wherein the warp yarns (15) at the roller side of the fabric are "fine" yarns of similar diameter to the warp yarns (13) of the face fabric and wherein the warp yarns (13, 15) exist in like numbers at both fabric faces. The fabric has a reduced tendency to retain water.
Description
A
COMMONWEALTH OF KUSTRALI'A PATENTS ACT 1952A Form COMPLETE SPECIFICATION
(ORIGINAL)
FOR Or'FICE USE: Application Number: Lodged: Complete Specificailon Lodged: Accepted: Published-, Priorilty: Class mnt, Class Related Art: i Name of Applicant: TO BE COMPLETED BY APPLICANT SCAPA GROUP PLC Address of Applicant: Oak field House, 52 Preston New Road, Blackburn, Lancashire BB2 6AH-, England Actual InventorP: IVAN FERN HEA.D and KEN PORTEOUS Address for Srurvice:. Care of R.K. MADDEflN ASSOCIATES, 345 Kingj William Street, Adelaide, State of South Australia, Comonwealth of Australia Complete Specification for the Invention entitled: "IMPROVEMENTS TO PAPERMACHINS AND LIKE CLOTHING" The following statement Is a full description of this Invention, Including the best method of performing It known to rpus
ABTRACT
IMPROVEMENTS TO PAPERMACHINE AND LIKE CLOTHING A papermakers wet felt is proposed which comprises a flat woven duplex fabric wherein the warp yarns (15) at the roller side of the fabric are "fine" yarns of similar diameter to the warp yarns (13) of the face fabric and wherein the warp yarns (13, exist in like numbers at both fabric faces. The fabric has a reduced tendency to retain water.
o a o o 0 0& 0 e 0 a 0 w0 0 la- IMPROVEMENTS TO PAPERMACHINE AND LIKE CLOTHING The invention concerns papermachine and like clothing and has particular reference to wet end fabrics.
Papermachine fabrics of double weave form are kno'in wherein the face, or paper side, is of plain weave S construction and the back of the fabric is, for example, 00 a four-shLft satin. In conventional fabrics of this kind o r the face fabric is woven from "fine" warp and weft yarns, 0 4 S whilst in the back the warp and weft both comprise "coarse" 0 0 yarns.
However, the known fabric as aforesaid, whilst providing the smooth paper-receiving face necessary to avoid marking, does possess a characteristic which detracts from its effectiveness. More particularly, the fabric has a tend- 4 ency to retain water, such water being released, by centrifugal forces, on passage of the fabric around support rollers at the end of a fabric run.
The present invention proposes a fabric wherein the inherent disadvantage of the prior structure as regards a high degree of water retention is avoided.
Thus, according to the present invention, a flat woven forming fabric of double weave form comprising a face layer of plain weave construction and a back layer joined thereto by binder yarns is characterised in that the warp yarns of the said back layer are of "fine" yarns having a 2 diameter in the range 0.15 to 0.22 mms. woven individually with the weft yarns of the said back layer and extending to the fabric surface and in that the warp yarns of the face and back layers are of substantially the same thickness.
S 5 According to a preferred feature, the warp and I, weft yarns of the face layer both comprise "fine" yarns.
By "fine" yarns is meant a yarn of a diameter (or the equivalent) commonly used at the paper supporting face of a papermakers fabric, in contradistinction to the "coarse" yarn commonly used at the "machine" side of the fabric. Typically, a "fine" yarn will be, say, 0.22 mms in of4 diameter, whilst a "coarse" yarn will have a diameter of, say, 0. 35 mms.
The invention will now be described further by way of example only, with reference to the accompanying diagt rammatic drawing illustrating one embodiment thereof.
Thus, referring now to the drawing, a forming fabric for a papermaking machine is of double weave construction, and comprises a face layer 11 of plain weave and a back layer 12 defined by a 3 and 1 straight twill.
The warp and weft yarns 13, 14 of the face layer are "fine" yarns having diameters of 0.17 mms and 0.18 mms, respectively.
SThe warp yarns 15, of the fabric layer at the roller side are, in the present example, of like diameter to the warp yarns 13 of the face layer, and are present in ,i j r 3 like number at both faces of the fabric, whilst the weft yarns 16 have a diameter of 0. 25 mms.
The weft binder yarns 17, two of which yarns are conveniently present in each pattern repeat, are of poly- 5 ester monofilament of a diameter of 0.12 mms, the warp and oa o weft yarns of both fabric layers similarly being monofilament polyester yarns.
In the face layer the weft is woven 24 picks per centimetre whilst in the back layer the corresponding figure is 16 picks per centimetre, there being 8 weft binder yarns per centimetre. There are 63 warp yarns per centimetre, in total.
The fabric as aforesaid has a thickness of 0.73 mm.
We have found that a wet end fabric constructed as aforesaid is effective in operation, and avoids, in whole or in part, the problem of water-retention inherent in known structures.
By way of comparison, a conventional double weave fabric having a "fine" layer of plain weave and a "coarse" back layer comprising a 3/1 twill, and wherein the diameter of the yarns of the face layer and back layer are respectively 0.17 and 0.25 mms. wherein the warp yarns exist as 26 ends per centimetre and 13 ends per centimetre in the face and back respectively, and wherein the weft direction yarns are r r~ -4 present at 30, 15 and 7 picks per centimetre in the face layer, back layer and in the binding layer, has a thickness of 0.82 mms and a materially greater tendency to retain water than has the fabric of the invention.
oo t 5 The invention is not limited to the precise detail of the example herein set forth, since alternatives will t present themselves to one skilled in the art.
Thus, for example, whilst, in the embodiment described, the warp yarns at the back of the fabric are of the same diameter as those in the front, yarns of a different diameter may be preferred in some instances, although in practical terms, substantial differences could not be accommodated. A warp diameter of 0.17 mms at one face is acceptable in combination with a warp diameter of 0.2 mms at the other face, but differences materially in excess of this may well give rise to difficulty. It is thought that, subject to the foregoing, warp yarns of a diameter lying within the range 0.15 to 0.22 mms will be of application in the context of the invention, with a preferred range of from 0.17 to 0.22 mms.
Furthermore, as in the embodiment described, the weft yarns in the face and back of the fabric may be of a different diameter from each other and indeed from that of either of the warp yarns.
'N T 0 k6-1
Claims (8)
1. A flat woven forming fabric of double weave construction comprising a face layer including "fine" yarns and of plain weave construction and a back layer joined thereto by binder yarns, rharacterised in that the warp yarns of the said back layer are "fine" yarns having a diameter in the range 0.15 to 0.22 mms woven individually with the weft yarns of the said back layer and extending to the fabric surface and in that the warp yarns of the face and back layers are of substantially the same thickness,
2. A fabric as claimed in claim 1, wherein the warp yarns of the back layer of the fabric are equal in number to the warp yarns of the face layer.
3. A fabric as claimed in claim 1 or 2, wherein the warp yarns of both fabric layers comprise synthetic monofilament yarns.
4. A fabric as claimed in any one of the preceding claims, wherein the warp and weft yarns comprise polyester yarns.
A fabric as claimed in any one of the preceding claims, wherein the binder yarns extend in the weft direction a of the fabric.
6. A fabric as claimed in any one of the preceding claims wherein the warp and weft yarns of the face layer both comprise "fine" yarns.
7. A fabric as claimed in any one of the preceding claims, wherein the warp yarns of the back layer have a diameter within the range 0.17 to 0.22 mms. '1 -6-
8. A flat woven forming fabric of double weave construction substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing. Dated this 10th day of October, 1990. SCAPA GROUP PLC, By its Patent Attorneys, R.K. MADDERN ASSOCIATES
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB878706552A GB8706552D0 (en) | 1987-03-19 | 1987-03-19 | Papermachine &c clothing |
| GB8706552 | 1987-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU1327188A AU1327188A (en) | 1988-09-22 |
| AU605261B2 true AU605261B2 (en) | 1991-01-10 |
Family
ID=10614245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU13271/88A Ceased AU605261B2 (en) | 1987-03-19 | 1988-03-18 | Improvements to papermachine and like clothing |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0283181B1 (en) |
| JP (1) | JPS646193A (en) |
| AT (1) | ATE63950T1 (en) |
| AU (1) | AU605261B2 (en) |
| DE (1) | DE3862963D1 (en) |
| ES (1) | ES2022612B3 (en) |
| FI (1) | FI881292L (en) |
| GB (2) | GB8706552D0 (en) |
| NO (1) | NO881202L (en) |
| ZA (1) | ZA881650B (en) |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5518042A (en) * | 1994-09-16 | 1996-05-21 | Huyck Licensco, Inc. | Papermaker's forming fabric with additional cross machine direction locator and fiber supporting yarns |
| US5983953A (en) * | 1994-09-16 | 1999-11-16 | Weavexx Corporation | Paper forming progess |
| US5709250A (en) * | 1994-09-16 | 1998-01-20 | Weavexx Corporation | Papermakers' forming fabric having additional fiber support yarns |
| US5937914A (en) * | 1997-02-20 | 1999-08-17 | Weavexx Corporation | Papermaker's fabric with auxiliary yarns |
| US5967195A (en) * | 1997-08-01 | 1999-10-19 | Weavexx Corporation | Multi-layer forming fabric with stitching yarn pairs integrated into papermaking surface |
| JPH1181174A (en) * | 1997-09-05 | 1999-03-26 | Nippon Felt Co Ltd | Double woven fabric for papermaking |
| US6112774A (en) * | 1998-06-02 | 2000-09-05 | Weavexx Corporation | Double layer papermaker's forming fabric with reduced twinning. |
| US6179013B1 (en) | 1999-10-21 | 2001-01-30 | Weavexx Corporation | Low caliper multi-layer forming fabrics with machine side cross machine direction yarns having a flattened cross section |
| US6123116A (en) * | 1999-10-21 | 2000-09-26 | Weavexx Corporation | Low caliper mechanically stable multi-layer papermaker's fabrics with paired machine side cross machine direction yarns |
| US6585006B1 (en) | 2000-02-10 | 2003-07-01 | Weavexx Corporation | Papermaker's forming fabric with companion yarns |
| US6244306B1 (en) | 2000-05-26 | 2001-06-12 | Weavexx Corporation | Papermaker's forming fabric |
| US6253796B1 (en) | 2000-07-28 | 2001-07-03 | Weavexx Corporation | Papermaker's forming fabric |
| US6745797B2 (en) | 2001-06-21 | 2004-06-08 | Weavexx Corporation | Papermaker's forming fabric |
| JP2003013384A (en) * | 2001-06-29 | 2003-01-15 | Nippon Felt Co Ltd | Woven fabric for paper manufacture |
| US6860969B2 (en) | 2003-01-30 | 2005-03-01 | Weavexx Corporation | Papermaker's forming fabric |
| US6837277B2 (en) | 2003-01-30 | 2005-01-04 | Weavexx Corporation | Papermaker's forming fabric |
| US6896009B2 (en) | 2003-03-19 | 2005-05-24 | Weavexx Corporation | Machine direction yarn stitched triple layer papermaker's forming fabrics |
| US7059357B2 (en) | 2003-03-19 | 2006-06-13 | Weavexx Corporation | Warp-stitched multilayer papermaker's fabrics |
| FI20030983A7 (en) * | 2003-06-30 | 2004-12-31 | Tamfelt Pmc Oy | Paper machine fabric |
| US7243687B2 (en) | 2004-06-07 | 2007-07-17 | Weavexx Corporation | Papermaker's forming fabric with twice as many bottom MD yarns as top MD yarns |
| US7195040B2 (en) | 2005-02-18 | 2007-03-27 | Weavexx Corporation | Papermaker's forming fabric with machine direction stitching yarns that form machine side knuckles |
| US7484538B2 (en) | 2005-09-22 | 2009-02-03 | Weavexx Corporation | Papermaker's triple layer forming fabric with non-uniform top CMD floats |
| US7219701B2 (en) | 2005-09-27 | 2007-05-22 | Weavexx Corporation | Papermaker's forming fabric with machine direction stitching yarns that form machine side knuckles |
| US7275566B2 (en) | 2006-02-27 | 2007-10-02 | Weavexx Corporation | Warped stitched papermaker's forming fabric with fewer effective top MD yarns than bottom MD yarns |
| US7580229B2 (en) | 2006-04-27 | 2009-08-25 | Hitachi Global Storage Technologies Netherlands B.V. | Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with antiparallel-free layer structure and low current-induced noise |
| US7487805B2 (en) | 2007-01-31 | 2009-02-10 | Weavexx Corporation | Papermaker's forming fabric with cross-direction yarn stitching and ratio of top machined direction yarns to bottom machine direction yarns of less than 1 |
| US7624766B2 (en) | 2007-03-16 | 2009-12-01 | Weavexx Corporation | Warped stitched papermaker's forming fabric |
| US20090183795A1 (en) | 2008-01-23 | 2009-07-23 | Kevin John Ward | Multi-Layer Papermaker's Forming Fabric With Long Machine Side MD Floats |
| US7766053B2 (en) | 2008-10-31 | 2010-08-03 | Weavexx Corporation | Multi-layer papermaker's forming fabric with alternating paired and single top CMD yarns |
| US8251103B2 (en) | 2009-11-04 | 2012-08-28 | Weavexx Corporation | Papermaker's forming fabric with engineered drainage channels |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3885602A (en) * | 1973-11-21 | 1975-05-27 | Creech Evans S | Woven fourdrinier fabric |
| SE385486B (en) * | 1974-10-10 | 1976-07-05 | Nordiska Maskinfilt Ab | PROPAGATION WIRE FOR PAPER, CELLULOSE OR SIMILAR MACHINES AND MANUFACTURED THE SAME |
| US4086941A (en) * | 1976-10-26 | 1978-05-02 | Huyck Corporation | Biplanar papermaker's belt |
| NZ191731A (en) * | 1978-10-23 | 1982-11-23 | Jwi Ltd | Duplex forming fabric for papermaking |
| SE435739B (en) * | 1983-02-23 | 1984-10-15 | Nordiskafilt Ab | DOUBLE TEXTILE TYPE FORMATION WIRES |
| DE3318985A1 (en) * | 1983-05-25 | 1984-11-29 | Fa. F. Oberdorfer, 7920 Heidenheim | Paper machine wire with two superposed fabric plies |
| DE3318990C2 (en) * | 1983-05-25 | 1994-10-20 | Oberdorfer F Siebtech Gmbh | Multi-layer paper machine screen |
| SE439651B (en) * | 1983-10-25 | 1985-06-24 | Nordiskafilt Ab | The forming fabric |
| FI844125L (en) * | 1984-03-26 | 1985-09-27 | Huyck Corp | PAPPERSMASKINTYG SOM BESTAOR AV SLITSTARKA TRAODAR. |
-
1987
- 1987-03-19 GB GB878706552A patent/GB8706552D0/en active Pending
-
1988
- 1988-03-07 DE DE8888301956T patent/DE3862963D1/en not_active Expired - Lifetime
- 1988-03-07 EP EP88301956A patent/EP0283181B1/en not_active Expired - Lifetime
- 1988-03-07 GB GB8805374A patent/GB2202869B/en not_active Expired - Lifetime
- 1988-03-07 AT AT88301956T patent/ATE63950T1/en not_active IP Right Cessation
- 1988-03-07 ES ES88301956T patent/ES2022612B3/en not_active Expired - Lifetime
- 1988-03-08 ZA ZA881650A patent/ZA881650B/en unknown
- 1988-03-18 JP JP63063765A patent/JPS646193A/en active Pending
- 1988-03-18 AU AU13271/88A patent/AU605261B2/en not_active Ceased
- 1988-03-18 FI FI881292A patent/FI881292L/en not_active Application Discontinuation
- 1988-03-18 NO NO881202A patent/NO881202L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB8706552D0 (en) | 1987-04-23 |
| GB2202869B (en) | 1991-01-30 |
| GB2202869A (en) | 1988-10-05 |
| ES2022612B3 (en) | 1991-12-01 |
| NO881202D0 (en) | 1988-03-18 |
| AU1327188A (en) | 1988-09-22 |
| FI881292A0 (en) | 1988-03-18 |
| GB8805374D0 (en) | 1988-04-07 |
| FI881292A7 (en) | 1988-09-20 |
| FI881292L (en) | 1988-09-20 |
| EP0283181B1 (en) | 1991-05-29 |
| EP0283181A1 (en) | 1988-09-21 |
| DE3862963D1 (en) | 1991-07-04 |
| JPS646193A (en) | 1989-01-10 |
| NO881202L (en) | 1988-09-20 |
| ZA881650B (en) | 1988-09-06 |
| ATE63950T1 (en) | 1991-06-15 |
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