EP0341041A2 - Nähte für einlagiges Gewebe mit senkrechten Verbindungsösen und Verfahren zu dessen Herstellung - Google Patents

Nähte für einlagiges Gewebe mit senkrechten Verbindungsösen und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0341041A2
EP0341041A2 EP89304445A EP89304445A EP0341041A2 EP 0341041 A2 EP0341041 A2 EP 0341041A2 EP 89304445 A EP89304445 A EP 89304445A EP 89304445 A EP89304445 A EP 89304445A EP 0341041 A2 EP0341041 A2 EP 0341041A2
Authority
EP
European Patent Office
Prior art keywords
loops
base fabric
fabric
series
machine direction
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.)
Withdrawn
Application number
EP89304445A
Other languages
English (en)
French (fr)
Other versions
EP0341041A3 (de
Inventor
Patrick H. Penven
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.)
Asten Inc
Original Assignee
Asten Inc
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
Priority claimed from US07/190,036 external-priority patent/US4883096A/en
Priority claimed from US07/190,037 external-priority patent/US5053109A/en
Priority claimed from US07/334,347 external-priority patent/US4991630A/en
Application filed by Asten Inc filed Critical Asten Inc
Publication of EP0341041A2 publication Critical patent/EP0341041A2/de
Publication of EP0341041A3 publication Critical patent/EP0341041A3/de
Withdrawn legal-status Critical Current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
    • D21F1/0054—Seams thereof

Definitions

  • This invention relates generally to a joint construction for a papermakers fabric. More particularly, the invention relates to pintle seamed joints for papermakers wet press felts.
  • wet felts convey the sheet of paper, paperboard, etc., from the wire or cylindrical mold through various water removing equipment.
  • Such wet felts are often woven endless and are applied as such to the rolls of the papermaking machine.
  • the installation of endless wet felts in the past has required cessation of operations for extended periods of time with the resultant loss of production from the paper machine.
  • U.S. Patent 2,883,734 provided a wet felt of a woven open-ended strip construction which was made endless by joining together the extensions of yarn from the weave of the felt at the joining ends thereof.
  • One end of the wet felt is fed through the press section of the machine, until it completes a full loop.
  • the yarn extensions at the joining ends of the felt are continuous with the weave system thereof and are used for joining together the two ends of the felt, and a textile yarn or cord is used to secure both sets of yarn extensions together and retain the two ends of the felt connected together to form an endless belt structure.
  • the wet felt is installed without having to disassemble the machine.
  • the caliper of the seam area is one problem addressed by my copending Patent Applications S. N. 190,136 and S.N. 190,037.
  • the permeability of the seam area and assembly of the seam during installation of the papermakers fabric can also be problematic.
  • the machine direction yarn loops generally have an angular orientation which is not orthogonal to the pintle. The angular orientation of the loops makes the fabric more difficult to seam during installation and may adversely effect the permeability of the fabric at the seam area.
  • a papermakers fabric is made with a woven base fabric having two ends.
  • the base fabric includes a single layer of machine direction yarns having a system of cross machine direction yarns interwoven in a repeat pattern.
  • the machine direction yarns are formed into a series of loops with a common angular orientation across the end of the base fabric.
  • the base fabric ends can thereby by joined by intermeshing the respective end series of loops and inserting a pintle through the intermeshed loops.
  • the angular orientation of the loops on one end of the base fabric are formed in the opposite direction from the angular orientation of the loops of the other end of the fabric when said respective end loops are intermeshed.
  • the base fabric is heat set with the base fabric ends jointed with a pintle such that both series of end loops take on a substantially vertical orientation.
  • a base fabric for a papermakers felt having a single layer of machine direction yarns formed into end loops for pin seaming which are substantially orthogonal to the pintle.
  • machine direction and cross machine direction refer to the fabric orientation on the papermaking machine rather than in the loom.
  • Figure 1 is a portion of a prior art seam construction in a woven fabric which includes a plurality of machine direction yarns 1 interwoven with a plurality of cross machine direction yarns 4 .
  • a plurality of integral contiguous seaming loops 2 , 3 are formed at each terminal end, respectively, of the woven fabric.
  • the seaming loops 2 are formed using techniques known in the art.
  • loops from each end of the fabric are intermeshed to form a channel and a pintle, such as 5 , is inserted to retain the fabric ends together in a substantially continuous, endless structure.
  • the end loops 2, 3 in the single layer fabric are formed with an angular orientation represented by angle ⁇ with respect to a vertical plane P which is orthogonal to the cross machine direction pintle yarn 5 .
  • the angular orientation of the formation of loops 2, 3 is inherent in single layer fabrics since in forming the loop machine direction yarn one passes out from the end of the fabric and returns next to itself to continue the weave of the fabric.
  • the machine direction yarns may extend from the end of the fabric, form the loop, and be rewoven directly beneath itself thereby forming a vertically oriented loop with no angular orientation.
  • the loops of a single layer base fabrics are formed at the respective ends of the fabric such that when the loop series are intermeshed the angular orientation of respective loops 2 and 3 is generally in the same direction.
  • the base fabric is heat set to render stability to the base fabric and seam.
  • Heat setting is performed with the base fabric ends joined by a pintle 5 inserted through the intermesh series of loops 2, 3 respectively.
  • Figure 2 illustrates the loops prior to heat setting;
  • Figure 3 illustrates the loops after the heat setting operation. The pintle is then removed to provide an open fabric for installation on papermaking equipment.
  • the base fabric 10 includes machine direction the yarns 11 interwoven with a single layer of cross machine direction yarns 14 . Similar to conventional single layer base fabrics, the machine direction yarns form a series of loops 12 and 13 , respectively, at each end of the base fabric.
  • the loops may be formed during weaving using endless and/or double endless weaving as discussed in my copending U.S. Patent Application S.N. 190,037 or, if the fabric is woven flat, the loops may be formed by back weaving the machine direction yarns as also discussed in that patent application.
  • the loops 12 and 13 are formed with an angular orientation ⁇ with respect a plane P which is orthogonal to the pintle 15 .
  • the loops 12 have an angular orientation in the opposite direction as the loops 13 of the other end of the fabric.
  • the base fabric 10 is heat set with the respective ends joined with a temporary pintle 15 .
  • the heat setting of base fabric 10 causes the angular orientation of respective loops 12 and 13 to converge towards each other and the orthogonal plane P. As best shown in Figure 6 , this results in the loops having 12, 13 a substantially vertical orientation after heat setting.
  • a fiberous batt 20 (shown in phantom) may be needled on one or both sides of the base fabric after heat setting dependant upon the intended usage of the finished papermakers fabric.
  • the temporary pintle 15 used during heat setting is removed to provide an open fabric in order to install the papermakers fabric on papermaking equipment.
  • the substantially vertical orientation of the respective loops 12, 13 facilitates the rejoining of the fabric ends when the fabric is installed.
  • the base fabric may be heat set in its endless state without having to intermesh the loops of the respective ends to insert a pintle therethrough.
  • the respective loops are formed around a temporary pintle.
  • any difficulty in the seaming of the non-heat set fabric is outweighed by the benefits of the substantial vertical orientation of the loops which they take on as a result of the heat setting process.
  • the substantial vertical orientation of the end loops 12, 13 after heat setting permits the speedy seaming of the fabric ends together when the fabric is installed on papermaking equipment where paper production cannot be continued until fabric installation is completed.
  • the vertical orientation of the end loops 12, 13 also contributes to a more uniform permeability of the fabric at the seam area.
  • the seam of a fabric In addition to being easily installed, the seam of a fabric must not create an irregularity in the overall fabric which would cause the aqueous paper web which is transported by the fabric to become marked or otherwise disfigured.

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  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
EP19890304445 1988-05-04 1989-05-03 Nähte für einlagiges Gewebe mit senkrechten Verbindungsösen und Verfahren zu dessen Herstellung Withdrawn EP0341041A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US07/190,036 US4883096A (en) 1988-05-04 1988-05-04 Seam design for seamed felts
US190136 1988-05-04
US07/190,037 US5053109A (en) 1988-05-04 1988-05-04 Single layer seamed papermakers fabric
US190037 1988-05-04
US07/334,347 US4991630A (en) 1989-04-10 1989-04-10 Single layer pin seam fabric having perpendicular seaming loops and method
US334347 1999-06-16

Publications (2)

Publication Number Publication Date
EP0341041A2 true EP0341041A2 (de) 1989-11-08
EP0341041A3 EP0341041A3 (de) 1991-09-11

Family

ID=27392672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890304445 Withdrawn EP0341041A3 (de) 1988-05-04 1989-05-03 Nähte für einlagiges Gewebe mit senkrechten Verbindungsösen und Verfahren zu dessen Herstellung

Country Status (1)

Country Link
EP (1) EP0341041A3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366778A (en) * 1991-10-11 1994-11-22 Asten Group, Inc. Woven papermakers fabric having a unibody seam and method for making the same
WO1999016965A1 (en) * 1997-09-30 1999-04-08 Asten, Inc. Woven loop seam fabric with improved loop alignment
WO2000009802A1 (en) * 1998-08-12 2000-02-24 Asten, Inc. Laminated multi-layered seam product with formed loops

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225900A (en) * 1963-12-13 1965-12-28 Fabric Res Lab Inc Lightweight dryer felt seams
GB2102730B (en) * 1981-07-31 1984-10-31 Albany Int Corp Improvements relating to pin seams
FR2600683B1 (fr) * 1986-06-26 1988-12-23 Feutres Papeteries Tissus Indl Feutre ouvert pour partie humide
DE3633395A1 (de) * 1986-10-01 1988-04-14 Heimbach Gmbh Thomas Josef Maschinenbespannung, insbesondere papiermaschinenfilz oder -sieb

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366778A (en) * 1991-10-11 1994-11-22 Asten Group, Inc. Woven papermakers fabric having a unibody seam and method for making the same
WO1999016965A1 (en) * 1997-09-30 1999-04-08 Asten, Inc. Woven loop seam fabric with improved loop alignment
US5913339A (en) * 1997-09-30 1999-06-22 Asten, Inc. Papermaker's fabric seam with improved loop alignment
WO2000009802A1 (en) * 1998-08-12 2000-02-24 Asten, Inc. Laminated multi-layered seam product with formed loops

Also Published As

Publication number Publication date
EP0341041A3 (de) 1991-09-11

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Owner name: ASTEN, INC.