US3717182A - Rapier loom - Google Patents

Rapier loom Download PDF

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Publication number
US3717182A
US3717182A US00038137A US3717182DA US3717182A US 3717182 A US3717182 A US 3717182A US 00038137 A US00038137 A US 00038137A US 3717182D A US3717182D A US 3717182DA US 3717182 A US3717182 A US 3717182A
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Prior art keywords
tapes
lay
loom
tape
cam
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US00038137A
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R Sparling
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/271—Rapiers
    • D03D47/272—Rapier bands
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms

Definitions

  • the inner ends of the tapes are provided with carrier members whereby one of the tapes carries the weft thread to the center of the shed as the tapes are fed inwardly, and then the the thread is automatically transferred to the carrier of the other tape whereupon when the tapes retract, the weft thread is carried across the remaining half of the shed to complete the pick.
  • a further problem that exists in shuttleless looms of the type disclosed in the above-mentioned Budzyna patent is to be sure that the feed and retraction of the flexible tapes are in proper timed sequence and relation to the rocking movement of the lay. More specifically, it is desirable and even essential that the flexible tapes feed and retract with maximum rapidity while the rocking motion of the lay is in its dwell. And, conversely, the flexible tapes should be in the dwell period of their cycle after retraction from the shed and while the lay is moving forwardly and rearwardly.
  • a further problem with shuttleless looms of thetype disclosed in the Budzyna patent is that the lay must stop while the tape is inserted into and retracted from the shed.
  • the vertically disposed tapes may be conveniently supported on one side by the reed.
  • Specially designed fingers are carried by the reed cap and extend downwardly therefrom to a point spaced from the reed and slightly below the upper edge of the tapes; whereupon the tapes, as they move across the shed, are supported between the reed and the aforesaid fingers. It has been found that by vertically positioning the tapes against the reed, less chance of skipping threads exists than where the tapes lie flat.
  • Another object of my invention is the provision of specially designed means for feeding and retracting the flexible tapes through the warp shed, which means operate in response to and are directly controlled by the conventional means in the loom for rocking the lay, whereby the desired time sequence and relationship between movement of the lay and feeding and retraction of the flexible tapes are achieved.
  • Another object of this invention is the provision of a shuttleless loom, the novel features of which are so constructed as to be readily associated with a conventional fly shuttle loom in order to convert the latter to a shuttleless loom.
  • FIG. 1 is a fragmentary front perspective view showing one half of a loom embodying the present invention
  • FIG. 2 is a fragmentary top plan view, partly in section, showing one of the rapier drive and guide means;
  • FIG. 3 is a fragmentary side elevational view showing the loom and rapier drive
  • FIG. 4 is a fragmentary front elevational view showing the loom and rapier drive
  • FIG. 5 is a fragmentary side elevational view of the drive means shown in FIG. 3, looking from the opposite direction, and with the lay in its rearward position;
  • FIG. 6 is a view similar to FIG. 5 with the lay in its forward position
  • FIG. 7 is a fragmentary top plan view of part of the drive means shown in FIGS. 5 and 6;
  • FIG. 8 is a fragmentary section, on an enlarged scale, of the lay assembly, including the rapier mounting and guide means;
  • FIG. 9 is a fragmentary section, on an enlarged scale, taken through one of the transfer blocks attached to the end of one of the rapiers.
  • FIG. is a fragmentary perspective view showing the rapiers and their transfer blocks, and the rapier support and guide means.
  • FIG. 1 there is shown a loom 10, or, more specifically, the right-hand half of the loom, it being understood that the construction shown in FIG. 1 is duplicated at the left end of the loom, which has therefore not been illustrated.
  • the loom 10 is in many respects of conventional structure and operation. Expressed differently, the loom 10 is in many respects similarly constructed to a conventional fly shuttle loom, and, in fact, one of the advantages of the present invention is the fact that a conventional fly shuttle loom may be converted to a shuttleless loom by modifying it to include the novel features of the present invention, hereinafter to be described in detail.
  • the loom 10 is supported by fixed frame portions l2, l4 and 16, there being the usual cross braces (not shown) for imparting structural rigidity to the frame members.
  • the frame portion 16 supports laterally extending arch members 18 which in turn rotatably support a plurality of sheaves 20, which in turn control the raising and lowering of the plurality of harnesses 22 and their associated heddles 24, all in a well-known manner.
  • the warp threads 26, are fed from any suitable source of supply (not shown) and pass through the reed 28 of the lay assembly shown generally at 30, see FIG. 8, and form the shed for receiving the weft thread, all of this being conventional in the textile art.
  • the lay assembly 30 comprises a laterally extending reed cap 32 which has a V-shaped bar 34 extending longitudinally along its undersurface, said V bar 34 cooperating with angle 36, also secured to the undersurface of reed cap 32 and extending longitudinally therealong, to wedgingly receive the enlarged upper end 38 of reed 28.
  • the lay assembly 30 further comprises a race member 40 having a cutout 42 for receiving the enlarged lower end 44 of reed 28.
  • lay sword 48 is rigidly secured to lay assembly 30 by any suitable means and that the lay sword and the lay assembly are rocked or reciprocated about shaft 46 by means of a connecting rod 52 which is pivotally attached to the lay sword as at 54.
  • Connecting rod 52 is driven by crank shaft 56 which in turn is driven by drive pulley 58 driven by motor 60.
  • the motor 60 by means of pulley 58, drives crank shaft 56, the rotation of which, through connecting rod 52, imparts rocking motion to the lay sword 48 about its rocker shaft 46, thus rocking the lay assembly 30, all in a manner well known in the art.
  • Conventional clutch means are provided, and a shifter handle 64 is operable to engage and disengage the clutch means.
  • suitable brake means may be controlled by brake handle 66.
  • Conventional take-up rolls 68, 70 are provided for receiving the woven cloth 72.
  • the loom 10, as described heretofore, is conventional in all respects.
  • the means for feeding the weft thread across the warp shed forms one of the important features of the present invention and will now be described. Since one of the basic concepts of this invention is the provision of a novel and improved shuttleless loom, it will be obvious that a fly shuttle is not used for feeding the weft thread. Rather, a pair of flexible tapes or rapiers 74 are employed for this purpose, it being understood that each tape 74 is identical in construction, as is the mounting means therefor, and hence only one of said tapes and mounting means will be described.
  • the tape 74 is of any suitable flexible construction, preferably plastic, and cooperates with sprocket wheel 76 for effecting the feed and retraction of the tape through the warp shed. Specifically, as will be seen most clearly in FIGS. 1 and 10, the tape 74 is provided with openings 78 which cooperate with the teeth 80 to effect driving engagement between the tape and the sprocket wheel. It is important to note that the wheel 76 is horizontally disposed and is oscillated by means of a vertical shaft 82, the drive for which will hereinafter be described. An arcuate plate 84 carries pressure rollers 86 which serve to maintain the tape 74 is engagement with wheel 76, as will be seen most clearly in FIG. 2.
  • the tape 74 is vertically disposed, or, expressed differently, rides on its edge, and the tape extends around sprocket wheel 76 for approximately 180 of the circumference of the latter and then passes under a guide lip 88 and then into the shed formed by the warp threads 26. At its inner most end, the tape 74 is secured to a transfer block 90; and, as will be seen most clearly in FIGS. 1, 2 and 10, the tape 74 as it enters the warp shed, is vertically disposed in juxtaposition to the reed 28, whereby the reed 28 actually acts as a support for one side of the tape 74.
  • the reed cap 32 is provided with a channel 92 that extends longitudinally along the undersurface of the reed cap, as will be seen most clearly in FIGS. 1 and 8; and secured to and depending from the bottom of channel 92 are a plurality of guide fingers 94.
  • the fingers 94 are generally angularly disposed with respect to reed 28 but have a lower portion 96 that is spaced from and substantially parallel to reed 28 and that depends slightly below the upper edge of tape 74, whereby the tape is actually sandwiched between reed 28 and portion 96 of fingers 94 and hence is maintained in the desired vertical disposition.
  • portion 96 is spaced from reed 28 sufficiently so as to permit the upper portion of block 90 to slide therebetween, as shown in FIGS. 9 and 10. Also, the fact that portions 96 of fingers 94 terminate above the race 40 provides sufficient area for the weft thread to be beat-up when the lay rocks forwardly. Expressed differently, although the lower edges of fingers 94 extend into the warp shed when the lay is in its normal position, as the lay is rocked forwardly, the lower edges of the fingers move toward the divergent front comer of the shed and clear the upper warp sheet so as not to interfere with the beat-up of the weft.
  • race 40 is provided with a race plate 98, preferably of plastic construction, on which the lower edge of tape 74 and block 90 slide.
  • a race plate 98 preferably of plastic construction, on which the lower edge of tape 74 and block 90 slide.
  • transfer block 90 forms no part of the present invention, and it will be understood that any suitable transfer means, such as those disclosed in the aforesaid Budzyna patent, for example, may be utilized.
  • any suitable transfer means such as those disclosed in the aforesaid Budzyna patent, for example, may be utilized.
  • novel drive means for the tape 74 have been developed and form an important part of the present invention.
  • the drive means for the tapes 74 is directly responsive to and is controlled by the means which impart rocking motion to the lay assembly. More specifically, the connecting rod 52 which imparts oscillating movement to lay sword 48 in the manner hereinbefore described has secured thereto a cam follower 104 which comprises a roller 106, see FIG. 7, that is received within the arcuate track 108 of cam member 110. As will be seen most clearly in FIGS.
  • the cam member 110 has a depending arm 112 fixedly secured thereto which is pivotally mounted at its lower extremity to the fixed frame of the loom 10, as at 114.
  • the roller 126 in turn carries an adjustable rocker arm 128, the forwardmost end of which is pivotally attached, as at 130, to a vertically extending rod 132 provided with a rack segment 134 at its lower extremity.
  • Rack 134 in turn drivingly engages pinion 136 whereupon reciprocal movement of rack 134 imparts oscillating movement to pinion 136 and shaft 138, which, through gear box 148, imparts the desired oscillation to the drive shaft 82 on which sprocket wheel 76 is mounted.
  • main crank shaft 56 actually drives the tape feed means; and, more specifically, a controlled relationship exists between the rocking motion of the lay assembly and the feed and retraction of the flexible tapes due to the cam action which exists between follower 1114 and its roller 106 carried by connecting rod 52 and the cam member 110 which in turn initiates the tape drive.
  • a rapier loom having a lay and means for im parting rocking movement to said lay, a pair of flexible rapier tapes, means for simultaneously feeding said tapes from opposite sides of the loom to substantially the center point of the lay and then retracting them, transfer means carried by the inner ends of said tapes whereby one of said transfer means carries a weft thread from one side of the loom to the center thereof and then transfers the weft thread to the other transfer means so that as the tapes retract, the weft thread is carried across the remaining half of the loom to complete the pick, and means supporting said tapes on their edges during their movement across the lay, said feeding means comprising a drive wheel at each side of the loom making driving engagement with one of said tapes, said wheels each being horizontally disposed and each having a vertical shaft fixed thereto, and means for oscillating said shafts to feed and retract said tapes, said oscillating means being controlled by said rocking means, whereby movement of said tapes is in predetermined timed sequence to rocking of the lay,
  • a second arm secured to and extending from said cam for oscillation therewith, linkage means interconnecting the free end of said second arm and said vertical shafts, whereby oscillation of said second arm results in oscillatory rotation of said vertical shafts.
  • a rapier loom having a lay comprising a reed depending from a transversely extending reed cap and means for imparting rocking movement to said lay to beat-up the weft, a flexible rapier tape having weft thread gripper means at its inner end, means for feeding said tape in and out with respect to the lay to carry a weft thread thereacross, guide means including an arcuate portion adjacent the end of the lay for guiding the tape through a portion of its in-and-out movement, and means supporting said tape on its edge during its movement across the lay, said means comprising a plurality of guide fingers extending downwardly from said reed cap in forwardly spaced relation to said reed to a point slightly below the top edge of said tape whereby said tape is maintained on edge between said fingers and said reed.
  • a rapier loom having a lay comprising a reed depending from a transversely extending reed cap and means for imparting rocking movement to said lay to beat-up the weft, a flexible rapier tape having weft thread gripper means at its inner end, means for feeding said tape in and out with respect to the lay to carry a weft thread thereacross, and means supporting said tape on its edge during its movement across the lay, said means comprising a plurality of guide fingers extending downwardly from said reed cap in forwardly spaced relation to said reed to a point slightly below the top edge of said tape whereby said tape is maintained on edge between said fingers and said reed, said feeding means comprising a drive wheel at one side of the loom making driving engagement with said tape, said wheel being horizontally disposed and having a vertical shaft fixed thereto, and means for oscillating said shaft to feed said tape in and out, said oscillating means being controlled by said rocking means, whereby movement of said tape is
  • said rocking means comprising a crank shaft and connecting rod
  • said oscillating means comprising an arcuate cam having a fixed arm extending therefrom and mounted for pivotal movement about a pivot point spaced from said cam, and a follower fixed to said connecting rod and slidably engaging said cam, whereby as said crank shaft rotates, oscillating motion is simultaneously imparted to said connecting rod and to said cam and arm, the movement of said follower along said cam causing said arm to oscillate in a predetermined relation to oscillation of said connecting rod.
  • a second arm secured to and extending from said cam for oscillation therewith, linkage means interconnecting the free end of said second arm and said vertical shaft, whereby oscillation of said second arm results in oscillatory rotation of said vertical shaft.
  • a rapier loom having a lay and means for imparting rocking movement to said lay, a pair of flexible rapier tapes, means for simultaneously feeding said tapes from opposite sides of the loom to substantially the center point of the lay and then retracting them, transfer means carried by the inner ends of said tapes whereby one of said transfer means carries a weft thread from one side of the loom to the center thereof and then transfers the weft thread to the other transfer means so that as the tapes retract, the weft thread is carried across the remaining half of the loom to complete the pick, and means supporting said tapes on their edges during their movement across the lay, said feeding means comprising a drive wheel at each side of the loom making driving engagement with one of said tapes, said wheels each being horizontally disposed and each having a vertical shaft fixed thereto, and means for oscillating said shafts to feed and retract said tapes, each of said tapes engaging its respective drive'wheel for approximately one half of the circumference thereof, the free ends of said tapes extending toward each other and
  • a flexible rapier tape having weft thread gripper means at its inner end, means for feeding said tape in and out with respect to the lay to carry a weft thread thereacross, said feeding means being directly responsive to and controlled by said rocking means, said feeding means comprising a drive wheel making driving engagement with said tape, said wheel having a drive shaft fixed thereto, and means for oscillating said shaft to feed said tape in and out, said rocking means comprising a crank shaft and connecting rod, said oscillating means comprising an arcuate cam having a fixed arm extending therefrom and mounted for pivotal movement about a pivot point spaced from said cam, and a follower fixed to said connecting rod and slidably engaging said cam, whereby as said crank shaft rotates, oscillating motion is simultaneously imparted to said connecting rod and to said cam and arm, the movement of said follower along said cam causing said arm to oscillate in a predetermined relation to oscillation of said
  • adjusting means comprising means for varying the length of said second arm.
  • said guide fingers each having a lower portion in guiding engagement with said tape, said lower portion being substantially parallel to said reed, and an upper portion that inclines away from said reed.

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  • Textile Engineering (AREA)
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US00038137A 1970-05-18 1970-05-18 Rapier loom Expired - Lifetime US3717182A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916957A (en) * 1973-08-13 1975-11-04 Raymond Dewas Tape drive in weaving machines
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
US3955603A (en) * 1973-08-23 1976-05-11 Societe Alsacienne De Constructions Mecaniques De Mulhouse Looms provided with means for making movement thereof uniform
US3972355A (en) * 1975-06-13 1976-08-03 Cox Foundry & Machine Company Weft inserting driving means for a shuttleless loom
FR2317399A1 (fr) * 1975-07-10 1977-02-04 Albatex Ag Guidage des pinces porte-trame a l'interieur de la foule sur metiers a tisser sans navette
FR2357673A1 (fr) * 1976-07-08 1978-02-03 Rueti Ag Maschf Organe d'insertion pour un metier a tisser a griffes
US4076053A (en) * 1975-07-10 1978-02-28 Albatex A.G. Means guiding the straps of the weft carrying grippers inside the shed
FR2393865A1 (fr) * 1977-06-09 1979-01-05 Albatex Ag Paire de pinces pour metiers a tisser sans navette
US4407237A (en) * 1981-02-18 1983-10-04 Applied Engineering Co., Inc. Economizer with soot blower
DE4120569A1 (de) * 1991-03-08 1992-09-10 Textilma Ag Greiferwebmaschine
FR2886951A1 (fr) * 2005-06-08 2006-12-15 Schonherr Textilmaschb Gmbh Dispositif d'insertion de fils de trame pour metier a deux nappes superposees et metier a tisser equipe d'un tel dispositif
US20120125475A1 (en) * 2009-08-11 2012-05-24 Lindauer Dornier Gesellschaft Mbh Gripper Head of a Weaving Machine
US8550123B2 (en) 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US20220356611A1 (en) * 2019-07-03 2022-11-10 3Ditex Device for creating a 3d preform, 3d production method using said device and 3d preform thus obtained

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190904439A (en) * 1909-02-23 1910-03-23 Emil Graf Improvements in Weft Inserting and Picking Apparatus for Looms.
FR1364194A (fr) * 1963-05-22 1964-06-19 Fischer Ag Brugg Georg Procédé et métier à tisser pour la fabrication d'étoffes
US3192958A (en) * 1962-04-18 1965-07-06 Saurer Ag Adolph Drive for gripper looms
US3447574A (en) * 1965-06-25 1969-06-03 Marcel Claeys Weft-gripper for shuttleless loom
US3487859A (en) * 1967-09-26 1970-01-06 Somet Soc Mec Tessile Looms

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190904439A (en) * 1909-02-23 1910-03-23 Emil Graf Improvements in Weft Inserting and Picking Apparatus for Looms.
US3192958A (en) * 1962-04-18 1965-07-06 Saurer Ag Adolph Drive for gripper looms
FR1364194A (fr) * 1963-05-22 1964-06-19 Fischer Ag Brugg Georg Procédé et métier à tisser pour la fabrication d'étoffes
US3447574A (en) * 1965-06-25 1969-06-03 Marcel Claeys Weft-gripper for shuttleless loom
US3487859A (en) * 1967-09-26 1970-01-06 Somet Soc Mec Tessile Looms

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916957A (en) * 1973-08-13 1975-11-04 Raymond Dewas Tape drive in weaving machines
US3955603A (en) * 1973-08-23 1976-05-11 Societe Alsacienne De Constructions Mecaniques De Mulhouse Looms provided with means for making movement thereof uniform
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
US3972355A (en) * 1975-06-13 1976-08-03 Cox Foundry & Machine Company Weft inserting driving means for a shuttleless loom
FR2317399A1 (fr) * 1975-07-10 1977-02-04 Albatex Ag Guidage des pinces porte-trame a l'interieur de la foule sur metiers a tisser sans navette
JPS5225160A (en) * 1975-07-10 1977-02-24 Albatex Ag Device for guiding weft gripper in shed of shuttleless loom
US4076053A (en) * 1975-07-10 1978-02-28 Albatex A.G. Means guiding the straps of the weft carrying grippers inside the shed
FR2357673A1 (fr) * 1976-07-08 1978-02-03 Rueti Ag Maschf Organe d'insertion pour un metier a tisser a griffes
US4271873A (en) * 1977-06-09 1981-06-09 Albatex A.G. Pair of grippers for weaving looms without shuttle
US4235261A (en) * 1977-06-09 1980-11-25 Albatex A.G. Pair of grippers for weaving looms without shuttle
FR2393865A1 (fr) * 1977-06-09 1979-01-05 Albatex Ag Paire de pinces pour metiers a tisser sans navette
US4407237A (en) * 1981-02-18 1983-10-04 Applied Engineering Co., Inc. Economizer with soot blower
DE4120569A1 (de) * 1991-03-08 1992-09-10 Textilma Ag Greiferwebmaschine
DE4120569C2 (de) * 1991-03-08 2000-05-31 Textilma Ag Greiferwebmaschine
FR2886951A1 (fr) * 2005-06-08 2006-12-15 Schonherr Textilmaschb Gmbh Dispositif d'insertion de fils de trame pour metier a deux nappes superposees et metier a tisser equipe d'un tel dispositif
EP1734165A1 (fr) * 2005-06-08 2006-12-20 SCHÖNHERR Textilmaschinenbau GmbH Dispositif d'insertion de fils de trame pour métier à deux nappes superposées et métier à tisser équipé d'un tel dispositif
CN1876919B (zh) * 2005-06-08 2011-06-01 圣豪纺织机械有限公司 织造双层织物的织机的引纬装置和装有这种装置的织机
US8550123B2 (en) 2009-08-07 2013-10-08 Lindauer Dornier Gesellschaft Mbh Device for transferring a band-shaped weft material
US20120125475A1 (en) * 2009-08-11 2012-05-24 Lindauer Dornier Gesellschaft Mbh Gripper Head of a Weaving Machine
US8656962B2 (en) * 2009-08-11 2014-02-25 Lindauer Dornier Gesellschaft Mbh Gripper head of a weaving machine
US20220356611A1 (en) * 2019-07-03 2022-11-10 3Ditex Device for creating a 3d preform, 3d production method using said device and 3d preform thus obtained

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