EP0027716B1 - Trockenfilzgewebe - Google Patents

Trockenfilzgewebe Download PDF

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Publication number
EP0027716B1
EP0027716B1 EP80303637A EP80303637A EP0027716B1 EP 0027716 B1 EP0027716 B1 EP 0027716B1 EP 80303637 A EP80303637 A EP 80303637A EP 80303637 A EP80303637 A EP 80303637A EP 0027716 B1 EP0027716 B1 EP 0027716B1
Authority
EP
European Patent Office
Prior art keywords
machine direction
layer
fabric
direction yarns
cross
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.)
Expired
Application number
EP80303637A
Other languages
English (en)
French (fr)
Other versions
EP0027716A1 (de
Inventor
Michael J. Josef
Eric R. Romanski
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.)
Albany International Corp
Original Assignee
Albany International 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.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22194594&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0027716(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Albany International Corp filed Critical Albany International Corp
Priority to AT80303637T priority Critical patent/ATE18451T1/de
Publication of EP0027716A1 publication Critical patent/EP0027716A1/de
Application granted granted Critical
Publication of EP0027716B1 publication Critical patent/EP0027716B1/de
Expired legal-status Critical Current

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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
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths

Definitions

  • the invention relates to paper machine clothing and more particularly relates to fabrics useful as dryer felts, and their use.
  • FR-A-2342368 describes a forming wire which is constructed entirely from monofilaments.
  • the wire is a so-called double-layer fabric consisting of two layers of cross-machine direction yarns interwoven by a plurality of machine direction yarns.
  • One layer of cross-machine direction yarns is disposed towards one side of the fabric, providing a fabric first periphery and, likewise, the second layer is disposed towards the other side of the fabric, providing a fabric second periphery.
  • Double-layer fabrics of this type provide forming wires of greater stability than single-layer fabrics, and do, accordingly, offer a measure of improvement in the forming section of the paper making machine.
  • the forming wire is intended to permit the free drainage of extremely large quantities of water from fibres which are being formed into a paper sheet and the required characteristics of the wire differ from those of a dryer felt which is intended to convey the formed paper web around a plurality of heated rollers so that the water remaining in the web is removed by evaporation.
  • the search for an improved dryer felt fabric has, accordingly, continued despite developments in the production of forming wire fabrics.
  • the present invention provides a paper making machine including a fabric comprising:
  • the machine direction yarn interweave the cross-machine direction yarns of the second layer at points within and spaced from the outside and inside planes of the second layer.
  • the cross-machine direction yarns support the paper sheet being dried.
  • the monofilament machine direction yarns are thus protected from direct contact with degradative elements.
  • the overall operating life of the dryer felt is significantly increased over felts where the monofilament machine direction yarns are in contact with the paper sheet being dried.
  • FIG. 1 is an enlarged, cross-sectional, side elevation of a portion of a fabric 10 embodying the invention.
  • the fabric 10 comprises a first sinuous layer 12 of monofilament cross-machine direction yarns 14.
  • the layer 12 forms a periphery of fabric 10 which in side profile shows peaks 16 and valley floors 18.
  • a plurality of at least two peaks 16 in layer 12 are in a single plane forming an outer periphery of fabric 10.
  • Preferably at least about 50 percent, most preferably all or substantially all of the peaks 16 are in the aforesaid plane.
  • Valley floors 18 are in a separate plane inside of the plane formed by the peaks 16.
  • a second sinuous layer 20 of monofilamentcross-machine direction yarns 14' forms another periphery of the fabric 10 which also appears, in side profile, as peaks 16' and valley floors 18'.
  • a plurality of at least two of the peaks 16' are in a single plane forming the outer periphery (preferably at least about 50 percent, most preferably all of the peaks 16' are in the periphery).
  • Valley floors 18' are in a separate, single plane inside of the plane formed by peaks 16'.
  • a plurality of monofilament machine direction yarns 22 are positioned between the outer fabric periphery formed by the outside planes, formed by the peaks 16 and the peaks 16' and interweave with the cross-machine direction yarns 14, 14' at points between the respective planes of peaks 16, valley floors 18 and peaks 16', valley floors 18'.
  • the knuckles of load bearing machine direction yarns 22 are below the peaks 16, 16' at the point where they interweave with the cross-machine direction yarns 14,14' and do not come into direct contact with the sheet 24 of paper carried on fabric 10, when fabric 10 is employed as a dryer fabric on a paper making machine.
  • the sheet 24 is supported on the peaks 16 of the cross-machine direction yarn 14.
  • the machine direction yarns 22 are also protected by the outwardly projecting peaks 16' from contact with elements of the paper making machine which might hasten abrasion or other degradation of the important load bearing machine direction yarns.
  • the greatest degradation of yarns in a dryer fabric occurs in those monofilament yarns in contact with sheet 24.
  • fabrics where the yarns 22 are on the outer periphery of layer 20 where they pass through layer 20.
  • the machine direction yarns 22 within layer 12 are paired with the yarns 22 within layer 20 and the yarns within the pairs are slightly offset from each other in regard to vertical alignment, as they knuckle over the cross-machine direction yarns 14, 14'.
  • the machine direction yarns pass over at least one cross-machine direction yarn, under at least one following cross-machine direction yarn and over at least one further following cross-machine direction yarn of the upper cross-machine direction layer before running down to interconnect the lower cross-machine direction layer with the upper cross-machine direction layer, the machine yarns and cross-machine direction yarns being thus interconnected in a repeat pattern.
  • the weave will be such that the relationship of the machine direction yarns and the upper layer of cross-machine direction yarns will be such that the plane of the upper surfaces of the portions of the cross-machine direction yarns of the upper layer over which the machine direction yarns pass is relatively elevated in a direction away from the plane of the upper surface of the fabric; and the plane of the exposed upper surfaces of the portions of the machine direction yarns in the upper layer under which the cross-machine direction yarns pass is relatively depressed in the opposite direction, whereby the differences in elevation between the exposed upper surface portions of the machine directly yarns are protected from contact with paper sheet which contacts the surface of the cross-machine direction yarns in the upper layer.
  • the yarns 14,14' and 22 may be monofilaments of any synthetic polymeric resin.
  • the yarns 14 and 14' may also be multifilament yarns.
  • Representative of such multi- and monofilaments are yarns of polyester, polyamide, polyolefin, polyaramid, polyimide and the like. Generally such yarns having diameters of from 10 to 40 mils are advantageously employed in the fabrics of the invention.
  • the fabrics of the invention may be woven flat and the ends joined by conventional seaming methods, known to those skilled in the art.
  • the seamed belts so made are readily employed as dryer felts in the dryer section 30 of a paper making machine as shown in Figure 2. As shown in Figure 2, the paper sheet 24 is held against the steam cylinders 32 by the endless belt 34 of fabric 10 during passage of sheet 24 through dryer section 30.
  • a fabric is prepared in a duplex weave of 0.020" diameter polyester monofilament (24 per inch) machine direction yarns and 0.020" diameter polyamide monofilament machine direction yarns (24 per inch) for a total of 48 machine direction yarns per inch interwoven with 0.020" diameter polyester monofilament (48 per inch; 24 top and 24 bottom) filling or cross-machine direction yarns.
  • a fabric is obtained having only cross-machine direction yarns in the outer plane of the fabric.
  • a representative portion of the fabric prepared is subjected to physical testing. The physical properties found are shown in Table I, below.
  • a fabric is woven in a duplex weave (4 warps and 8 pick repeat) with machine and cross-machine direction yarns as follows:
  • the fabric of the invention may be woven to include various stuffer picks, to obtain fabrics of different permeabilities as will be appreciated by those skilled in the art.

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  • Paper (AREA)
  • Woven Fabrics (AREA)

Claims (8)

1. Papierherstellungsmaschine einschließlich eines Tuchs (10), umfassend:
eine erste sinusförmige Schicht (12) von quer zur Maschinenrichtung verlaufenden Fäden (14), die eine erste Tuchaußenfläche von Kuppen (16) und Talböden (18) liefern, wobei sich eine Vielzahl von Kuppen (16) in einer ersten außenseitigen Ebene und eine Vielzahl von Talböden (18) in einer ersten innenseitigen Ebene befinden;
eine zweite sinusförmige Schicht (12) von quer zur Maschinenrichtung verlaufenden Fäden (14'), die eine zweite Tuchaußenfläche von Kuppen (16') und Talböden (18') liefern, wobei sich eine Vielzahl von Kuppen (16') in einer zweiten außenseitigen Ebene und eine Vielzahl von Talböden (18') in einer zweiten innenseitigen Ebene befinden; und
eine Vielzahl von in Maschinenrichtung verlaufenden Monofilamentfäden (22) zwischen der ersten und zweiten außenseitigen Ebene angeordnet und die quer zur Maschinenrichtung verlaufenden Fäden (14,14') der ersten und zweiten Schicht verflechtend,
dadurch gekennzeichnet, daß die in Maschinenrichtung verlaufenden Fäden (22) die quer zur Maschinenrichtung verlaufenden Fäden (14) der ersten Schicht (12) an Stellen innerhalb und mit Abstand von den außen- und innenseitigen Ebenen der ersten Schicht durchflechten; daß das Tuch (10) in der Trockenpartie (30) der Maschine zur Verwendung als ein Papierherstellungsmaschinentrockenfilz vorgesehen ist; und daß die außenseitige Ebene der ersten Schicht eine Papierberührungsebene definiert.
2. Papierherstellungsmaschine nach Anspruch 1, weiter dadurch gekennzeichnet, daß die in Maschinenrichtung verlaufenden Fäden (22) die quer zur Maschinenrichtung verlaufenden Fäden (14') der zweiten Schicht (20) an Stellen innerhalb und mit Abstand zu den außen- und innenseitigen Ebenen der zweiten Schicht durchflechten.
3. Papierherstellungsmaschine nach Anspruch 2, weiter dadurch gekennzeichnet, daß wenigstens 50 Prozent der Kuppen (16) der ersten Schict (12) sich in der ersten außenseitigen Ebene befinden.
4. Papierherstellungsmaschine nach irgendeinem vorhergehenden Anspruch, weiter dadurch gekennzeichnet, daß wenigstens 50 Prozent der Kuppen (16') der zweiten Schicht (20) sich in der zweiten außenseitigen Ebene befinden.
5. Papierherstellungsmaschine nach irgendeinem vorhergehenden Anspruch, weiter dadurch gekennzeichnet, daß alle Kuppen (16) der ersten Schicht (12) in der ersten außenseitigen Ebene, alle Talböden (18) der ersten Schicht (12) in der ersten innenseitigen Ebene, alle Kuppen (16') der zweiten Schicht (20) in der zweiten außenseitigen Ebene und alle Talböden (12') der zweiten Schicht (20) in der zweiten innenseitigen Ebene liegen.
6. Papierherstellungsmaschine nach irgendeinem vorhergehenden Anspruch, weiter dadurch gekennzeichnet, daß die quer zur Mschinenrichtung verlaufenden Fäden (14, 14') Monofilamente sind.
7. Papierherstellungsmaschine nach irgendeinem der Ansprüche 1 bis 5, weiter dadurch gekennzeichnet, daß die quer zur Maschinenrichtung verlaufenden Fäden (14, 14') Multifilamente sind.
8. Verfahren zur Papierherstellung, umfassend die Verwendung einer Papierherstellungsmaschine wie in irgendeinem der Ansprüche 1 bis 7 beansprucht.
EP80303637A 1979-10-17 1980-10-15 Trockenfilzgewebe Expired EP0027716B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80303637T ATE18451T1 (de) 1979-10-17 1980-10-15 Trockenfilzgewebe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8588379A 1979-10-17 1979-10-17
US85883 1979-10-17

Publications (2)

Publication Number Publication Date
EP0027716A1 EP0027716A1 (de) 1981-04-29
EP0027716B1 true EP0027716B1 (de) 1986-03-05

Family

ID=22194594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303637A Expired EP0027716B1 (de) 1979-10-17 1980-10-15 Trockenfilzgewebe

Country Status (12)

Country Link
EP (1) EP0027716B1 (de)
JP (1) JPS5663092A (de)
AR (1) AR226563A1 (de)
AT (1) ATE18451T1 (de)
AU (1) AU541327B2 (de)
BR (1) BR8004757A (de)
CA (1) CA1144407A (de)
DE (1) DE3071465D1 (de)
FI (1) FI77493C (de)
MX (1) MX155248A (de)
SE (1) SE8007255L (de)
ZA (1) ZA805077B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8836751B2 (en) 2011-11-08 2014-09-16 Intouch Technologies, Inc. Tele-presence system with a user interface that displays different communication links

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA814577B (en) * 1980-07-10 1982-09-29 Albany Int Corp Dryer felt fabric
US4359069A (en) * 1980-08-28 1982-11-16 Albany International Corp. Low density multilayer papermaking fabric
US5238537A (en) * 1981-09-15 1993-08-24 Dutt William H Extended nip press belt having an interwoven base fabric and an impervious impregnant
US5234551A (en) * 1981-09-24 1993-08-10 Dutt William H Extended nip press belt having an interwoven base fabric and an impervious impregnant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139119A (en) * 1960-05-18 1964-06-30 William E Buchanan Fourdrinier fabric
US3211606A (en) * 1960-11-25 1965-10-12 Wisconsin Wire Works Paper making wire
DE1611765A1 (de) * 1968-01-24 1971-02-11 Oberdorfer Metalltuchfabrik F Verfahren zur Herstellung eines Papiermaschinensiebes und nach diesem Verfahren hergestelltes Sieb
SE385486B (sv) * 1974-10-10 1976-07-05 Nordiska Maskinfilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner samt sett att framstella densamma
SE397371C (sv) * 1976-02-24 1980-08-18 Nordiska Maskinfilt Ab Formeringsvira for pappers-, cellulosa- eller liknande maskiner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8836751B2 (en) 2011-11-08 2014-09-16 Intouch Technologies, Inc. Tele-presence system with a user interface that displays different communication links

Also Published As

Publication number Publication date
AR226563A1 (es) 1982-07-30
ZA805077B (en) 1981-09-30
JPH0143078B2 (de) 1989-09-18
AU541327B2 (en) 1985-01-03
ATE18451T1 (de) 1986-03-15
AU6295980A (en) 1981-04-30
EP0027716A1 (de) 1981-04-29
SE8007255L (sv) 1981-04-18
BR8004757A (pt) 1981-04-28
CA1144407A (en) 1983-04-12
JPS5663092A (en) 1981-05-29
FI803255L (fi) 1981-04-18
DE3071465D1 (en) 1986-04-10
FI77493B (fi) 1988-11-30
MX155248A (es) 1988-02-08
FI77493C (fi) 1989-03-10

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