US3335844A - Hinge seams for dryer felts and the like - Google Patents

Hinge seams for dryer felts and the like Download PDF

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Publication number
US3335844A
US3335844A US562629A US56262966A US3335844A US 3335844 A US3335844 A US 3335844A US 562629 A US562629 A US 562629A US 56262966 A US56262966 A US 56262966A US 3335844 A US3335844 A US 3335844A
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US
United States
Prior art keywords
loops
wire
pintle
felt
wires
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 - Lifetime
Application number
US562629A
Other languages
English (en)
Inventor
Hindle Thomas
John R Hindle
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.)
Scapa Blackburn Ltd
Original Assignee
Scapa Dryers Ltd
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
Application filed by Scapa Dryers Ltd filed Critical Scapa Dryers Ltd
Application granted granted Critical
Publication of US3335844A publication Critical patent/US3335844A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D3/00—Woven fabrics characterised by their shape
    • D03D3/04—Endless fabrics
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/16—Belt fasteners
    • Y10T24/1668—Wire

Definitions

  • the invention relates to a hinge seam for use in an endless travelling felt, conveyor band or the like, but is concerned more particularly with a seam for an endless dryer felt as used for example in paper-making, boardmaking, and similar machinery.
  • the invention relates to that type of hinge seam known in the trade as a clipper seam, which comprises a number of side-by-side wire loops or eyes extending from the two edges to be joined, with the loops or eyes on one edge staggered and interleaved with respect to those on the other edge, a pintle wire being passed through the interleaved loops, across the width of the felt, to form the hinge pivot.
  • a clipper seam which comprises a number of side-by-side wire loops or eyes extending from the two edges to be joined, with the loops or eyes on one edge staggered and interleaved with respect to those on the other edge, a pintle wire being passed through the interleaved loops, across the width of the felt, to form the hinge pivot.
  • This selective gripping of the pintle-wire by the two sets of wire loops means that at some point or points in its length the pintle-wire is subjected to reverse twisting, which leads to rapid fracture of the pintle-wire or of some of its component wires if of cabled or plaited form. In some cases this may result in a premature failure of the clipper seam, which becomes apparent all to late by the felt, which may be running at over 2,500 feet per minute, collapsing into the paper machine basement and, during its descent possibly damaging other dryer felts on the same machine.
  • a stranded steel wire is provided with a protective coating of nylon or other synthetic plastic which has greater resistance to the surface abrasion caused by the wire loops than has the unprotected stranded wire normally used.
  • these protective covering although more resistant to abrasion do not in any useful degree make the pintle-wire more resistant to the above-described repeated reverse twisting action and the useful life of such covered pintlewires is still severely limited when compared with the extended life provided by a modern dryer felt.
  • a clipper seam is characterised in that two pintle-wires are provided, through the interleaved sets of loops and maintained in rolling contact with each other under the tension in the felt.
  • the wire loops on the edges of the felt are elongated so as to allow of the two side-by-side pintlewires being threaded there through.
  • the shape and size of the loops will be such as to prevent the said pintle-wires moving to relative positions where they would not be in rolling contact under stress from the tension of the felt.
  • the shape of the loops in side elevation and the cross-sectional shape of the pintle-wires are such that there is a Wedging action between each wire and the respective set of loops, this action tending to hold the wire firmly in the loops non-rotatably so that the wholly of the flexing or bending movement between the two ends of the felt takes place between and along the whole length of the pintle-wires only.
  • each of the said two pintle-wires becomes locked to the set of wire loops whose extremities embrace it, this locking elfect being uniform along the whole length of the wire, whereby reverse movement between different parts of a wire is prevented. Also, as each wire becomes fixed to the loops which contact it there is no repeated movement between the wire and the loops, so that abrasive wear of the pintle-wire and/ or the wire loops which would result therefrom is completely prevented. What movement there is between abutting surfaces, namely between the peripheries of the two wires, being in the nature of a rolling movement rather than a sliding movement, abrasive wear is reduced to the minimum.
  • the necessary elongated formation of the loops to re ceive the two side-by-side pintle-wires may be the result of these loops being made to an increased length or, in a less preferred arrangement, such formations may be the result of the loops being secured to the felt nearer to the edge of the felt than is normal so as to leave a larger part of each loop available for interleaving with those of the other set.
  • FIG. 1 is a diagrammatic plan view of a portion of a paper-machine dryer felt, showing a clipper seam according to the present invention
  • FIG. 2 is a section on the line 22 of FIG. 1;
  • FIGS. 3 and 4 are diagrammaticillustrations of alternative embodiments of the invention.
  • the conventional clipper seam is made by inserting wire clips at regularly spaced intervals along the thicker selvedge of each of two strips of tapered webbing of the character of that disclosed in British patent specification 847,646.
  • One strip of webbing wit-h the clips attached is stitched to the underside of each end of the felt in such a manner that when the two sets of clips are engaged they provide a continuous passage through the interleaved eyes, and the ends of the felt form a closelybutted joint just beyond the longer clinching toes of one set of clips.
  • the seam is completed by the introduction of a flexible hinge or pintle Wire through the interleaved eyes of the clips.
  • the seam constructed in accordance with the invention and as illustrated in FIGS. 1 and 2 is made in a similar manner to that above described except that, after the two sets of clips 24, 26 are engaged, two flexible hinge or pintle-wires 44 and 46 are threaded through the interleaved eyes of the clips.
  • the lengths of leg of the clips are increased slightly as compared with conventional clips to accommodate the two wires side-by-side and the shape and size of the hooks are such that they keep the two wires in rolling contact under the tension of the dryer felt.
  • the invention is not limited to wire loops having a semi-circular outer end therto, since in some circumstances the loops may be of a different form.
  • the loops may be made with a V formation at the outer ends as shown in FIG. 5, and as the pintle-wire (especially if coated with a synthetic sheath or braid as is known, and with or without a synthetic dope applied to such sheath or braid) becomes forced into the V loops there is a compression .of the sheath into the V formations which holds the pintle-wire non-rotatably.
  • the pintlewire 62, 64 instead of being made to circular cross section, are made to a non-circular cross-section, having an arcuate surface 62a, 64a where they will abut each other longitudinally and a non-arcuate surface 62b, 64b where they engage a corresponding shape in the loops.
  • the wire clips may be clinched directly in the two ends of the dryer felt or, alternatively, may be clinched along one edge of a narrow webbing, one piece of which is then securely sewn to each end of the dryer felt, with the same general effect.
  • any suitable type of webbing such as, for example, four layer webbing of uniform thickness or two thicknesses of two-layer webbing may be employed.
  • a clipper seam for an endless felt comprising a plurality of side-by-side wire loops extending from the edges to be joined, the loops on one edge being staggered and interleaved with respect to those on the other, and
  • each pintle wire has a non-arcuate surface portion thereto and the respective loops a complementary region to receive such portion.
  • a paper making or like felt including a clipper seam which comprises a plurality of side-by-side wire loops extending from the edges to be joined, the loops on one edge being staggered and interleaved with respect to those on the other, and two pintle wires through the interleaved sets of loops, the said wires being maintained in rolling contact with each other under the tension in the felt, characterized in that the shape of the loops in side elevation and the cross-section of the pintle wires are such that there is a wedging action between each wire and the respective set of loops thereby to hold the wire nonrotatably in such loops.
  • a clipper seam comprising side-by-side elongated wire loops extending outwardly from the edges to be joined, the loops on one edge being staggered and interleaved with respect to those on the other, a passage defined by the said interleaved loops, the said passage being of generally oval transverse cross-section of which the major axis lies in the direction of the loops, and two pintle wires in side-by-side disposition in the said passage, the said pintle wires being maintained in rolling contact with each other under the tension in the felt, characterized in that the shape of the loops in side elevation and the crosssection of the pintle wires are such that there is a wedging action between each wire and the respective set of loops thereby to hold the wire non-rotatably in such loops.
  • a paper maker felt including a clipper seam comprising two sets of side-by-side loops respectively, extending outwardly from the edges to be joined, the loops on one edge being staggered and interleaved with respect to those on the other, a passage defined by the said interleaved loops, the said passage being of generally oval transverse cross-section of which the major axis lies in the direction of the loops, and two pintle wires in sideby-side disposition in the said passage, the said pintle Wires being maintained in rolling contact with each other under the tension in the felt characterized in that the shape of the loops in side elevation and the crosssection of the pintle wires are such that there is a wedging action between each wire and the respective set of loops thereby to hold the wire non-rotatably in such loops.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Belt Conveyors (AREA)
  • Clamps And Clips (AREA)
US562629A 1965-07-07 1966-07-05 Hinge seams for dryer felts and the like Expired - Lifetime US3335844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB28773/65A GB1114602A (en) 1965-07-07 1965-07-07 Improvements relating to hinge seams for dryer felts and the like

Publications (1)

Publication Number Publication Date
US3335844A true US3335844A (en) 1967-08-15

Family

ID=10280925

Family Applications (1)

Application Number Title Priority Date Filing Date
US562629A Expired - Lifetime US3335844A (en) 1965-07-07 1966-07-05 Hinge seams for dryer felts and the like

Country Status (8)

Country Link
US (1) US3335844A (de)
AT (1) AT292440B (de)
BE (1) BE683797A (de)
CH (1) CH459740A (de)
DE (1) DE1303678B (de)
GB (1) GB1114602A (de)
NL (1) NL6609310A (de)
SE (1) SE342272B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576055A (en) * 1968-07-12 1971-04-27 Scapa Dryers Ltd Pintle wires for clipper seams
US3653097A (en) * 1969-02-05 1972-04-04 J J Marz Gmbh Fa Means for connecting together the ends of bands of fabric
US4791708A (en) * 1984-02-23 1988-12-20 Asten Group, Inc. Abrasion and hydrolysis resistant joining means for fabric seams
US4806208A (en) * 1987-10-14 1989-02-21 Asten Group, Inc. Method of seaming a seamed felt on a papermaking machine with oppositely tapered pintle elements

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572905A (en) * 1976-08-10 1980-08-06 Scapa Porritt Ltd Papermakers fabrics
DE102013214033A1 (de) * 2013-07-17 2015-01-22 Voith Patent Gmbh Bespannung und Verfahren zum Herstellen einer Bespannung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698100A (en) * 1923-03-31 1929-01-08 Delco Light Co Endless belt for roller wringers
US2587053A (en) * 1948-10-21 1952-02-26 Charles M Lopez Joint construction for endless belts
US3225900A (en) * 1963-12-13 1965-12-28 Fabric Res Lab Inc Lightweight dryer felt seams

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1698100A (en) * 1923-03-31 1929-01-08 Delco Light Co Endless belt for roller wringers
US2587053A (en) * 1948-10-21 1952-02-26 Charles M Lopez Joint construction for endless belts
US3225900A (en) * 1963-12-13 1965-12-28 Fabric Res Lab Inc Lightweight dryer felt seams

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3576055A (en) * 1968-07-12 1971-04-27 Scapa Dryers Ltd Pintle wires for clipper seams
US3653097A (en) * 1969-02-05 1972-04-04 J J Marz Gmbh Fa Means for connecting together the ends of bands of fabric
US4791708A (en) * 1984-02-23 1988-12-20 Asten Group, Inc. Abrasion and hydrolysis resistant joining means for fabric seams
US4806208A (en) * 1987-10-14 1989-02-21 Asten Group, Inc. Method of seaming a seamed felt on a papermaking machine with oppositely tapered pintle elements

Also Published As

Publication number Publication date
AT292440B (de) 1971-08-25
SE342272B (de) 1972-01-31
BE683797A (de) 1967-01-09
NL6609310A (de) 1967-01-09
DE1303678B (de) 1972-09-21
CH459740A (de) 1968-07-15
GB1114602A (en) 1968-05-22

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