GB1598698A - Clipper seam for joining fabric ends - Google Patents

Clipper seam for joining fabric ends Download PDF

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Publication number
GB1598698A
GB1598698A GB1758777A GB1758777A GB1598698A GB 1598698 A GB1598698 A GB 1598698A GB 1758777 A GB1758777 A GB 1758777A GB 1758777 A GB1758777 A GB 1758777A GB 1598698 A GB1598698 A GB 1598698A
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United Kingdom
Prior art keywords
loop
elements
forming
elongate element
aperture
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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
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GB1758777A
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Scapa Blackburn Ltd
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Scapa Porritt Ltd
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Publication date
Application filed by Scapa Porritt Ltd filed Critical Scapa Porritt Ltd
Priority to GB1758777A priority Critical patent/GB1598698A/en
Publication of GB1598698A publication Critical patent/GB1598698A/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G3/00—Belt fastenings, e.g. for conveyor belts
    • F16G3/02—Belt fastenings, e.g. for conveyor belts with series of eyes or the like, interposed and linked by a pin to form a hinge
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof

Description

(54) A CLIPPER SEAM FOR JOINING FABRIC ENDS (71) We, SCAPA-PoRRIlT LIMITED, a British Company of Cartmell Road, Blackburn, Lancashire BB2 2SZ, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention concerns a clipper seam for jointing fabric ends and has particular, though by no means exclusive, reference to a seam for joining together of the ends of a paper machine dryer felt so as to make an endless felt.
It is well known in the art to join together the ends of a paper machine dryer felt, (which expression is to be construed so as to include all types of open-ended clothing, such as, for example, highly permeable open mesh synthetic fabrics, employed in the dryer part of the paper machine to press the moving web of paper against the heated surfaces of the drying cylinders), by what is referred to as a "Clipper Seam", such seam comprising respective sets of wire loops secured to the ends to be joined, the loops extending in the longitudinal direction of the felt and being arranged in interdigitated disposition to receive a pintle wire into engagement with the overlapped portions of the two sets.The wire loops are usually of generally U-shaped form, the parallel limbs of such loops being of unequal length and each such limb having an inwardly directed barb or hook at the remote end thereof for engagement with the felt or with a webbing applied to such felt. A typical seam of the aforesaid character is disclosed in British Patent Specification No. 1.040,694.
As a development of the clipper seam as aforesaid, it has also been proposed to include two side-by-side pintle wires in the interdigitated loops, the loops being of elongate form to accommodate the additional pintle wire and the pintle wires, in use, being maintained in rolling contact on flexing of the felt, as when passing over rollers, by virtue of the tension in the felt.
A Clipper Seam having two side-by-side pintle wires is disclosed in British Patent Specification No. 1,114,602.
It has also been proposed to utilise the warp-wise extending yarns of a woven felt as an alternative to the wire loops of the aformentioned clipper seams, some of the weft yarns of the woven felt being removed to provide a narrow band arranged in spaced parallel disposition relative to the end of the felt which has only warp yarns and the end being folded over about the axis of the weftless band to form a multiplicity of side-byside loops. A helical coil is secured to the felt by engaging successive turns thereof with the respective spaces between adjacent warp yarns in the weft-free band, prior to folding the end of the felt about the axis of the weftless band thus to hold the coil captive in the felt with the said successive turns extending from the end of the felt, and the folded end of the felt is sewn or otherwise secured to the body thereof.A Clipper seam as aforesaid is disclosed in the specification of British Patent Specification No. 1,348,098.
Difficulty is often experienced in connection with the various aforesaid Clipper Seams on account of the inherent difficulty in locating the pintle wire in the interdigitated loops having regard to the small crosssectional dimensions of the loop, and pintle wire and, more particularly, in view of the length of seam, say 20 to 30 feet, involved.
The object of the invention is to provide alternatives to the various prior art structures which will allow of a more ready effecting of a join between fabric ends.
It is a further object of the present invention to provide a means for effecting a join between fabric ends which, in one manner of application, can be applied to and be held in position by warp loops of the fabric ends (or by loops formed on a web intended for attachment to the fabric ends) in analogous manner to the securing of the helical coil of prior British Patent SpeQifica- tion No. 1,348,098 aforesaid.
According to the present invention there is proposed, a clipper seam for a papermakers felt including a jointing means comprising a respective elongate element for attachment to each of the ends to be joined and having a multiplicity of laterally extending loopforming elements arranged in spaced sideby-side disposition on each elongate element, the laterally extending loop-forming elements of one elongate element being intended for interdigitation with the corresponding laterally extending loop-forming elements of the other elongate element to receive a pintle wire therethrough for effecting the join, characterised in that the loop forming elements of at least one elongate element each comprise a body part having plural apertures or aperture parts therein, there being a first, or loop-forming, aperture or aperture part for alignment with the corresponding apertures or aperture parts of other loop-forming elements on interdigitation of the loop-forming elements of the two elongate elements, and a second, or attachment aperture or aperture part to receive the elongate element on which the loop-forming element is mounted, the said loop forming apertures or aperture parts being outwardly tapered in a direction away from the related attachment aperture or aperture part.
According to one aspect of the invention, the loop-forming elements of the said one elongate element are engageable with a pintle wire engaged with the loop-forming elements of the other elongate element by application thereto in the transverse direction thereof in the use condition of the clipper seam.
Preferably, the loop-forming elements adapted to be engageable with a pintle wire as aforesaid define respective closed loops each having a displaceable part thereto movable inwardly of the loop in the plane thereof.
The invention will now be described further. by way of example only, with reference to the accompanying drawings in which: Fig. 1 shows, in enlarged diagrammatic perspective view, the elements of a jointing means according to a first embodiment of the invention; Fig. 2 is an end elevation of a clipper seam embodying the jointing means of Fig. 1; Fig. 3 is a side elevation of a loop-forming element constructed in accordance with the invention; Fig. 4 is a section taken on line IV--IV of Fig. 3; Fiq. 5 is a section taken on line V-V of Fig. 3; Fig. 6 is a side elevation of a further embodiment of the invention; and Fiz. 7 is a section taken on line VII--VII of Fig. 6.
Referring now to the drawings, and particularly to Fig. 1 thereof, a jointing means for use in forming a clipper seam joining the opposed ends of a flat-woven papermakers felt comprises two elongate elements 11, 12 each for engagement with and attachment to a respective end 13, 14 of a papermakers felt 15 in analogous manner to the coil as disclosed in British Patent Specification No. 1,348,098. Each of the elongate elements 11, 12 is provided with a multiplicity of laterally extending elements 16, 17 formed integrally therewith, the said laterally extending elements being arranged in spaced side-by-side disposition and the elements 16 of one elongate element 11 being intended for interdigitation with the elements 17 of the other elongate element 12 to receive a pintle wire 18 therethrough.
The elongate elements 11, 12 are each of rod form, and the laterally extending elements 16 of element 11 each comprise an apertured head 19 joined to a collar 20 coaxial with the rod 11 by a neck 21. The laterally extending elements 17 of elongate element 12 each comprise a collar 22 coaxial with the rod defining element 12 and a closed loop extending outwardly from such collar, the loop 23 having a movable part 231 adjacent the collar 22 and partially overlying the opposed end of the nonmovable part 2311.
Elements 16, 17 may be formed integrally with the elongate elements 11, 12 respectively, or may be formed separately and subsequently applied thereto, as preferred.
As will readily be appreciated, movable part 231 can be displaced inwardly of the loop to provide an access opening whereby the loop-forming element 17 is engageable with or is disengageable from a pintle wire.
The jointing elements will conveniently be of moulded form, and may be produced from a variety of synthetic plastics materials, the preferred material of choice being nylon. The pintle wire 18 will be of a commercially available kind.
In use, see now Fig. 2, the individual elongate elements 11, 12 of the jointing means are each applied to a respective one of the fabric ends to be joined by engagement with a weft-free zone in such end region and are secured in position by folding over the fabric end and sewing the end to the body of the fabric. The pintle wire 18 is threaded through the aligned apertures 191 of the side-by-side laterally extending elements 16, and the loop-forming laterally extending elements 17 of the other elongate element 12 are engaged with the pintle wire 18 by moving such elements 17 downwardly and transversely of the pintle wire so as to displace the movable part 231 to provide access to the interior of the outwardly tapered closed loop.
If it is required to separate the ends of the felt, then this is effected simply by withdrawing the pintle wire.
A second embodiment is shown in Figs.
3 to 5, the loop-forming element 24 comprising a flat body part 24a having spaced apertures therein, a first aperture 24b being intended to receive the elongate element on which the loop-forming element is mounted and a second aperture 24c being for alignment with corresponding apertures of the opposed loop-forming elements to define therewith a passage to receive a pintle wire or like joining element.
The loop-forming element 24 is of moulded form, and a range of synthetic plastics materials is thought to be of application. Satisfactory elements have been produced from nylon, but the invention is not restricted to the use of this particular material.
The first aperture 24b is of circular form to receive an elongate element of like crosssection into engagement therewith, whilst the second aperture 24c is outwardly tapered relative to the first aperture. By arranging that the loop-forming element 24 is a close fit on the elongate element, the loop-forming element will maintain a preselected angular disposition upon such elongate element.
However, it may be preferred to maintain a preselected angular disposition of the loopforming element on the elongate element by providing a non-circular first aperture on the loop-forming element to receive an elongate element of corresponding noncircular cross-section into engagement therewith, in which case the aperture will be of oval form, as shown at 24b1 in Figs. 6 and 7.
In applying the jointing means of Figs.
3 to 7 to a fabric end, loop-forming elements in a number appropriate to the context are applied to an elongate element in spaced disposition thereon, and the resultant structure is attached to one of the ends to be joined by engaging the loop-forming elements with respective interstices in the fabric end so that such elements extend through the fabric and folding the end about the elongate element.
The outwardly extending loop-forming elements of the two fabric ends are arranged in interdigitated disposition, and such ends are joined together by passing a pintle wire through the aligned elongate apertures of the respective elements.
Alternatively, the individual elements may be engaged between adjacent warp loops as existing at a fabric end and a wire threaded through such warp loops and elements, thereby to provide a plurality of side-by-side pintle wire receiving apertures at a fabric end for alignment with the corresponding apertures in respective individual elements at an opposed fabric end on movement of the ends into adjacent parallel disposition, a pintle wire being threaded through the aligned apertures to complete the seam.
The invention is not restricted to the exact features of the specific embodiments herein disclosed since alternatives will readily present themselves to one skilled in the art.
Thus, in the case of such as the embodiment shown in Figs. 1 and 2, whilst we prefer to use a closed loop formation having a displaceable part whereby such loop is engageable with the pintle wire it may be found convenient in some circumstances, to utilise an open loop having an access opening of a width appropriate to permit passage of the pintle wire transversely thereinto.
Alternatively, the inherent resilience of the material of the open loop, having regard to its physical properties and to its dimensions, may be such as to permit of the press engagement of the loop with the pintle wire.
In the case of those embodiments wherein the loop-forming elements are provided as separate elements, it may be found convenient to use spacers whereby such elements are maintained in a requisite spaced disposition, such spacers being formed integrally with the loop-forming elements or as separate integers, as preferred.
Whilst we prefer to apply elongate elements with loop-forming elements thereon to the fabric ends in analogous manner to the coil of prior British Patent Specification No. 1,348,098 it may be found more convenient, in some instances, to provide a pintle wire in the warp loops formed by folding back a fabric end and which engages the apertured laterally extending elements which extend partially into register with such loops, the closed loops being engageable in such circumstances, with the elongate elements.
It is also to be observed that failure of an individual loop-forming element will be limited to that individual element, in contradistinction to a failure in a seam embodying a helical coil wherein the effect of the failure extends through several turns of the coil at either side of the break.
WHAT WE CLAIM IS: 1. A clipper seam for a papermakers felt including a jointing means comprising a respective elongate element for attachment to each of the ends to be joined and having a multiplicity of laterally extending loopforming elements arranged in spaced sideby-side disposition on each elongate element, the laterally extending loop-forming elements of one elongate element being intended for interdigitation with the corresponding laterally extending loop-forming elements of the other elongate element to receive a pintle wire therethrough for effect
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    the felt, then this is effected simply by withdrawing the pintle wire.
    A second embodiment is shown in Figs.
    3 to 5, the loop-forming element 24 comprising a flat body part 24a having spaced apertures therein, a first aperture 24b being intended to receive the elongate element on which the loop-forming element is mounted and a second aperture 24c being for alignment with corresponding apertures of the opposed loop-forming elements to define therewith a passage to receive a pintle wire or like joining element.
    The loop-forming element 24 is of moulded form, and a range of synthetic plastics materials is thought to be of application. Satisfactory elements have been produced from nylon, but the invention is not restricted to the use of this particular material.
    The first aperture 24b is of circular form to receive an elongate element of like crosssection into engagement therewith, whilst the second aperture 24c is outwardly tapered relative to the first aperture. By arranging that the loop-forming element 24 is a close fit on the elongate element, the loop-forming element will maintain a preselected angular disposition upon such elongate element.
    However, it may be preferred to maintain a preselected angular disposition of the loopforming element on the elongate element by providing a non-circular first aperture on the loop-forming element to receive an elongate element of corresponding noncircular cross-section into engagement therewith, in which case the aperture will be of oval form, as shown at 24b1 in Figs. 6 and 7.
    In applying the jointing means of Figs.
    3 to 7 to a fabric end, loop-forming elements in a number appropriate to the context are applied to an elongate element in spaced disposition thereon, and the resultant structure is attached to one of the ends to be joined by engaging the loop-forming elements with respective interstices in the fabric end so that such elements extend through the fabric and folding the end about the elongate element.
    The outwardly extending loop-forming elements of the two fabric ends are arranged in interdigitated disposition, and such ends are joined together by passing a pintle wire through the aligned elongate apertures of the respective elements.
    Alternatively, the individual elements may be engaged between adjacent warp loops as existing at a fabric end and a wire threaded through such warp loops and elements, thereby to provide a plurality of side-by-side pintle wire receiving apertures at a fabric end for alignment with the corresponding apertures in respective individual elements at an opposed fabric end on movement of the ends into adjacent parallel disposition, a pintle wire being threaded through the aligned apertures to complete the seam.
    The invention is not restricted to the exact features of the specific embodiments herein disclosed since alternatives will readily present themselves to one skilled in the art.
    Thus, in the case of such as the embodiment shown in Figs. 1 and 2, whilst we prefer to use a closed loop formation having a displaceable part whereby such loop is engageable with the pintle wire it may be found convenient in some circumstances, to utilise an open loop having an access opening of a width appropriate to permit passage of the pintle wire transversely thereinto.
    Alternatively, the inherent resilience of the material of the open loop, having regard to its physical properties and to its dimensions, may be such as to permit of the press engagement of the loop with the pintle wire.
    In the case of those embodiments wherein the loop-forming elements are provided as separate elements, it may be found convenient to use spacers whereby such elements are maintained in a requisite spaced disposition, such spacers being formed integrally with the loop-forming elements or as separate integers, as preferred.
    Whilst we prefer to apply elongate elements with loop-forming elements thereon to the fabric ends in analogous manner to the coil of prior British Patent Specification No. 1,348,098 it may be found more convenient, in some instances, to provide a pintle wire in the warp loops formed by folding back a fabric end and which engages the apertured laterally extending elements which extend partially into register with such loops, the closed loops being engageable in such circumstances, with the elongate elements.
    It is also to be observed that failure of an individual loop-forming element will be limited to that individual element, in contradistinction to a failure in a seam embodying a helical coil wherein the effect of the failure extends through several turns of the coil at either side of the break.
    WHAT WE CLAIM IS: 1. A clipper seam for a papermakers felt including a jointing means comprising a respective elongate element for attachment to each of the ends to be joined and having a multiplicity of laterally extending loopforming elements arranged in spaced sideby-side disposition on each elongate element, the laterally extending loop-forming elements of one elongate element being intended for interdigitation with the corresponding laterally extending loop-forming elements of the other elongate element to receive a pintle wire therethrough for effect
    ing the join, characterised in that the loop forming elements of at least one elongate element each comprise a body part having plural apertures or aperture parts therein, there being a first, or loop-forming, aperture or aperture part for alignment with the corresponding apertures or aperture parts of other loop-forming elements on interdigitation of the loop-forming elements of the two elongate elements, and a second, or attachment aperture or aperture part to receive the elongate element on which the loop-forming element is mounted, the said loop forming apertures or aperture parts being outwardly tapered in a direction away from the related attachment aperture or aperture part.
  2. 2. A clipper seam as claimed in claim 1, wherein the loop-forming elements of the said one elongate element are engageable with a pintle wire engaged with the loopforming elements of the other elongate element by application thereto in the transverse direction thereof in the use condition of the clipper seam.
  3. 3. A clipper seam as claimed in any one of the preceding claims, wherein the laterally extending loop-forming elements are located axially relative to the elongate element on which such elements are mounted.
  4. 4. A clipper seam as claimed in any one of the preceding claims, wherein the laterally extending loop-forming elements are rotationally fixed relative to the elongate element on which such elements are mounted.
  5. 5. A clipper seam as claimed in any one of the preceding claims, wherein the loopforming elements adapted to be engageable with a pintle wire as aforesaid define respective closed loops each having a displaceable part thereto movable inwardly of the loop in the plane thereof.
  6. 6. A clipper seam as claimed in claim 5, wherein the loop-forming elements adapted to be engageable with or separable from a pintle wire as aforesaid each comprise a collar arranged coaxially with the elongate element and a closed loop extending outwardly from such collar, the displaceable part being provided on such closed loop.
  7. 7. A clipper seam as claimed in claim 5 or 6, wherein the loop-forming elements of the other elongate element each comprise an apertured head joined to a collar coaxial with such elongate element by an integral neck.
  8. 8. A clipper seam as claimed in any one of claims 5 to 7 wherein the individual loopforming elements are formed integrally with the respective elongate element upon which such loop-forming elements are mounted.
  9. 9. A clipper seam substantially as hereinbefore described with reference to and as illustrated in Figs. 1 and 2, Figs. 3 to 5 or Figs. 6 and 7 of the accompanying drawings.
  10. 10. A papermakers felt including a clipper seam as claimed in any one of claims 1 to 9.
GB1758777A 1978-04-27 1978-04-27 Clipper seam for joining fabric ends Expired GB1598698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1758777A GB1598698A (en) 1978-04-27 1978-04-27 Clipper seam for joining fabric ends

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1758777A GB1598698A (en) 1978-04-27 1978-04-27 Clipper seam for joining fabric ends

Publications (1)

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GB1598698A true GB1598698A (en) 1981-09-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034146A1 (en) * 1995-04-27 1996-10-31 Scapa Group Plc Papermakers fabric seaming
EP1357224A2 (en) * 2002-04-25 2003-10-29 Thomas Josef Heimbach GmbH & Co. Papermaking belt and process for making a connection between the end edges of such a belt
WO2004044310A1 (en) * 2002-11-13 2004-05-27 Albany International Corp. On-machine-seamable industrial fabric comprised of interconnected rings
US7141144B2 (en) * 2002-12-04 2006-11-28 Albany International Corp. Multi-layer woven seam baseweave having different sized seam attachments

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996034146A1 (en) * 1995-04-27 1996-10-31 Scapa Group Plc Papermakers fabric seaming
EP1357224A2 (en) * 2002-04-25 2003-10-29 Thomas Josef Heimbach GmbH & Co. Papermaking belt and process for making a connection between the end edges of such a belt
EP1357224A3 (en) * 2002-04-25 2004-05-06 Thomas Josef Heimbach GmbH & Co. Papermaking belt and process for making a connection between the end edges of such a belt
WO2004044310A1 (en) * 2002-11-13 2004-05-27 Albany International Corp. On-machine-seamable industrial fabric comprised of interconnected rings
US6918998B2 (en) 2002-11-13 2005-07-19 Albany International Corp. On-machine-seamable industrial fabric comprised of interconnected rings
CN100460593C (en) * 2002-11-13 2009-02-11 阿尔巴尼国际公司 Industrial fabric comprising of interconnected rings
US7141144B2 (en) * 2002-12-04 2006-11-28 Albany International Corp. Multi-layer woven seam baseweave having different sized seam attachments

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