US3862647A - Apparatus for directing weft thread into a groove of a rotary reed of weaving looms - Google Patents

Apparatus for directing weft thread into a groove of a rotary reed of weaving looms Download PDF

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Publication number
US3862647A
US3862647A US366403A US36640373A US3862647A US 3862647 A US3862647 A US 3862647A US 366403 A US366403 A US 366403A US 36640373 A US36640373 A US 36640373A US 3862647 A US3862647 A US 3862647A
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United States
Prior art keywords
weft thread
weft
reed
rotary reed
traveling
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Expired - Lifetime
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US366403A
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English (en)
Inventor
Josef Holub
Josef Lzicar
Jan Dubanek
Jaroslav Stech
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Vyzkumny Ustav Bavlnarsky AS
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Vyzkumny Ustav Bavlnarsky AS
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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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/26—Travelling-wave-shed looms

Definitions

  • ABSTRACT A traveling-wave shedding loom havng a plurality of [451 Jan.28,1l975 weft inserting means adapted to follow an endless path and each carrying each a pirn with a necessary weft thread length to be inserted into said wave-travelling shed, a plurality of spooling heads designed to follow, within a certain section, the same endless path as said weft inserting means and to pay off said necessary weft thread length to the respective weft inserting means within said certain section of said endless path, said weft inserting means leaving then said respective spooling head and p r oceeding o'n'its course toward the wave-traveling shed along a straight path, and a rotary reed comprising a plurality of recessed discs disposed face-to-face on a common shaft in such relative angular position that said recesses together form a helical groove to receive the weft threads for conveying it to a beat-
  • the loom includes a weft thread deflecting element disposed between said rotary reed and the path of said spooling heads and adapted to reciprocate between two extreme positions while shunting said weft thread in each of said extreme positionsand between them so as to correct an angle of the weft thread entering and already received by said helical groove in said rotary reed to correspond to the lead angle of said groove.
  • the weft thread in one of said extreme positions of said weft thread deflecting element, is beaten up to the fell of woven fabric by the first or foremost disc of said rotary reed.
  • the present invention relates to an apparatus for directing weft thread into a groove in a rotary reed of weaving looms, particularly the rotary reed of traveling-wave shedding looms.
  • the rotary reed used, as a rule, in traveling-wave shedding looms comprises a plurality of discs disposed face-to-face on a common shaft extending across the weaving loom, each of the discs being provided with a recess designed to receive the weft thread to be conveyed into a beat-up position adjacent the fabric fell.
  • the discs are supported on said shaft in such angular positions that the particular recesses are periodically staggered relative to one another so as together to form a helical groove extending along the rotary reed and rotating therewith in operation.
  • the rotation of the reed is synchronized with the successive shed changes, the shed along the reed assuming a wavy course so that it successively opens in front of each particular weft inserter after which it closes behind it and then again opens for the next weft inserter, etc.
  • the weft thread to be inserted into the travelingwave shed is wound off from a pirn supported on each weft inserter, the necessary weft length being paid off from respective spooling heads.
  • Both the weft thread inserters and the spooling heads are movedalong an endless path, at least one portion of the path being common for the two. After a particular weft thread inserter has covered said common path portion, it leaves the respective spooling head and follows a straight path towards the traveling-wave shed, which path is parallel with the longitudinal rotary reed axis.
  • the weft thread tensioned between the weft inserter and an exit brake of the spooling head forms with the straight path of the weft inserter an angle which successively varies as the weft thread inserter and the spooling head leave each other, the inlet angle of the weft thread entering the helical groove in the rotary reed not corresponding to the lead angle of said groove; this condition causes difficulties in the reed threading-in operation.
  • This inlet angle of the weft thread entering the reed groove depends upon the momentary position which the spooling head assumes at the instant the weft thread inserter enters into the traveling-wave shed; this position is a function of the spooling head speed which cannot be optionally selected, since the speed of the movement of the weft thread inserter and the spooling head upon said common path portion thereof has to correspond to the speed of the former when advancing along its straight path towards said traveling-wave shed.
  • an apparatus comprising a weft thread deflecting element disposed between the rotary reed and the path of the spooling head, and adapted to reciprocate between two extreme positions while shunting in each of said extreme positions and also between them, said weft thread so as to correct said angle of the weft thread entering and already received by said helical groove in said rotary reed to correspond to the lead angle of said groove.
  • the weft thread in one of said extreme positions of said weft thread deflecting element, is beaten up to the fell of the woven fabric by the first or foremost disc of said rotary reed.
  • the weft thread deflecting element is supported on an oscillable arm controlled by a cam which rotates at the same speed as the rotary reed. If using a rotary reed in the particular discs of which there are provided more than one recess, the number of revolutions of the cam is product of the number of recesses in the reed and the number of revolutions of the reed or, in other words. one double stroke of the weft thread deflecting element always falls on each particular recess in the rotary reed discs.
  • FIG. 1. is a fragmentary detail plan view of a traveling-wave shedding loom showing the apparatus accord ing to the invention.
  • FIG. 2. is an elevational view of the apparatus on an enlarged scale.
  • a rotary reed I comprises a plurality of discs 2 disposed face-to-face on a common shaft 3 extending across the weaving machine, each of the discs 2 being provided with a recess 4 designed to receive a weft thread 5.
  • FIG. 2. illustrates the disc 2 in the initial position in which the weft thread 5 begins to be inserted into the recess 4 thereof, while the dash-line contours indicate the position the recess 4 will assume after a partial disc rotation at the instant of beating up the weft thread 5 on the fell of a fabric 6.
  • the discs 2 are supported by said shaft 3 in such angular positions that the particular recesses 4 are periodically staggered relative to one another so as together to form a helical groove 7 extending axially along the rotary reed I, as it is apparent from FIG. 1.
  • Inserters 8 designed to insert the weft thread into a traveling-wave shed of warp 9 each carries a pirn l0 rotatably arranged thereon and containing a length of the weft thread 5 sufficient for a single pick.
  • the weft inserters 8 are adapted in the weaving machine to move along an endless path 11, a section thereof which is common with a path of spooling heads 12, being designed as a region where the desired weft lengths are spooled on to said pirns 10.
  • the actual device for directing the weft thread 5 into the helical groove 7 in the reed 1 comprises a weft thread deviating element 13 supported for reciprocation in bearings 14 between the rotary reed 1 and the path of the spooling heads 12, and serving for shunting the weft thread 5 out of its straight path.
  • a weft thread deviating element 13 supported for reciprocation in bearings 14 between the rotary reed 1 and the path of the spooling heads 12, and serving for shunting the weft thread 5 out of its straight path.
  • the weft thread 5 is tensioned between the weft inserter 8 and an exit brake 16 of the spooling head 12.
  • the weft thread deviating element 13 is supported by an arm I7 (FIG. 2) journalled at 18 to oscillate and provided with a roll 19 which is forced by a spring 20 against a single lobe cam 21.
  • the drive of the cam 21 is derived from said shaft 3 of the rotary reed 1 via a transmission gear 22 in a ratio of one to one, so that a single revolution of said cam 21 corresponds to a single revolution of the reed 1, of which the respective discs 2 are provided with the single recess; if a rotary reed of which the discs are provided with more than one recesses is used, the number of cam revolutions is the product of the number of recesses and the number of reed revolutions.
  • weft inserter 8 leaves the spooling head 12 and follows a straight path parallel with the longitudinal reed axis and running towards the traveling-wave shed in the direction of arrow 23 while the spooling head 12 proceeds in its arcuate course in the direction of arrow 24.
  • the weft thread 5 tensioned between the weft inserter 8 and the spooling head 12 at this instant forms with said path 11, i.e. with the longitudinal reed axis in the plan view of FIG. 1, an angle which successively varies.
  • the tensioned weft thread 5 bears against the operative portion of the weft thread deviating elemnt 13 in its extreme position indicated in FIG. 1 by dash-lines.
  • the arm 17 is forced against the cam 21 on its minimum radius. in this way the section of the weft thread 5 between the weft inserter 8 and the spooling head 12 is divided into two sections which form with each other an angle other than 180.
  • the shape of the cam 21 is selected so that in any of the positions of the deviating element 13 successively assumed during its reciprocation the angle B remains constant.
  • the angle B remains constant up to the second extreme position of the deviating element 13 indicated in FIG. 1 in full lines, in which position the weft thread has just been beaten up by the first or foremost disc 2 on to the fell of the fabric 6.
  • the deviating element 13 enables the rotary reed l to be threaded-in with the weft thread 5 in the optimum manner from the technological viewpoint.
  • a traveling-wave shedding loom having wavetraveling shed forming means, a plurality of weft inserting means adapted to follow an endless path and each carrying a pirn with a necessary weft thread length to be inserted into said wave-traveling shed, a plurality of spooling heads designed to follow, within a certain section, the same endless path as said weft inserting means and to pay off said necessary weft thread length to the respective weft inserting means within said certain section of said endless path, said weft inserting means then leaving said respective spooling head and proceeding in its course toward the wave-traveling shed along a straight path and a rotary reed comprising a plurality of recessed discs disposed face-to-face on a common shaft in such a relative angular position that said recesses together form a helican groove to receive the weft thread for conveying it to a beat-up position adjacent the fell of the woven fabric being produced while said weft thread in the region between said wef
  • a traveling-wave shedding loom as defined in 1 claim 1, wherein the means reciprocating said weft thread deflecting element comprises an arm supporting the deflecting element, and a cam control means for oscillating said arm.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
US366403A 1972-06-12 1973-06-04 Apparatus for directing weft thread into a groove of a rotary reed of weaving looms Expired - Lifetime US3862647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS4053A CS160327B1 (it) 1972-06-12 1972-06-12

Publications (1)

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US3862647A true US3862647A (en) 1975-01-28

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US366403A Expired - Lifetime US3862647A (en) 1972-06-12 1973-06-04 Apparatus for directing weft thread into a groove of a rotary reed of weaving looms

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US (1) US3862647A (it)
JP (1) JPS534146B2 (it)
AT (1) AT322472B (it)
BR (1) BR7304373D0 (it)
CH (1) CH564113A5 (it)
CS (1) CS160327B1 (it)
DD (1) DD104819A5 (it)
DE (1) DE2328437C3 (it)
ES (1) ES415772A1 (it)
FR (1) FR2187971B1 (it)
GB (1) GB1377040A (it)
IN (1) IN138751B (it)
IT (1) IT985397B (it)
PL (1) PL86417B1 (it)
SU (1) SU461995A1 (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989069A (en) * 1973-10-24 1976-11-02 Vyzkumny Ustav Bavinarsky Method of and apparatus for compensating for weft tension in traveling-wave shedding looms
US4194537A (en) * 1976-10-04 1980-03-25 Vyzkumny Ustav Bavlnarsky Arrangement for guiding a weft thread end under tension toward a fabric fell in travelling-wave looms
CN103981619A (zh) * 2014-05-26 2014-08-13 苏州东茂纺织实业有限公司 一种漩涡式捕纬装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954056A (en) * 1958-10-22 1960-09-27 Warner Swasey Co Weaving machine
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3732896A (en) * 1971-04-26 1973-05-15 Vyzk Ustav Bavlnarsky Method of and apparatus for filling the shuttles with weft in progressive shed weaving looms

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954056A (en) * 1958-10-22 1960-09-27 Warner Swasey Co Weaving machine
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3732896A (en) * 1971-04-26 1973-05-15 Vyzk Ustav Bavlnarsky Method of and apparatus for filling the shuttles with weft in progressive shed weaving looms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989069A (en) * 1973-10-24 1976-11-02 Vyzkumny Ustav Bavinarsky Method of and apparatus for compensating for weft tension in traveling-wave shedding looms
US4194537A (en) * 1976-10-04 1980-03-25 Vyzkumny Ustav Bavlnarsky Arrangement for guiding a weft thread end under tension toward a fabric fell in travelling-wave looms
CN103981619A (zh) * 2014-05-26 2014-08-13 苏州东茂纺织实业有限公司 一种漩涡式捕纬装置

Also Published As

Publication number Publication date
PL86417B1 (it) 1976-05-31
JPS4985358A (it) 1974-08-15
SU461995A1 (ru) 1975-02-28
FR2187971A1 (it) 1974-01-18
DE2328437B2 (de) 1979-06-28
IN138751B (it) 1976-03-27
DE2328437A1 (de) 1974-01-03
DD104819A5 (it) 1974-03-20
CH564113A5 (it) 1975-07-15
DE2328437C3 (de) 1980-02-21
CS160327B1 (it) 1975-03-28
FR2187971B1 (it) 1977-02-11
GB1377040A (en) 1974-12-11
BR7304373D0 (pt) 1974-09-05
AT322472B (de) 1975-05-26
ES415772A1 (es) 1976-02-01
JPS534146B2 (it) 1978-02-14
IT985397B (it) 1974-11-30

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