US3481370A - Selective weft depositors for shuttleless looms - Google Patents

Selective weft depositors for shuttleless looms Download PDF

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Publication number
US3481370A
US3481370A US644389A US3481370DA US3481370A US 3481370 A US3481370 A US 3481370A US 644389 A US644389 A US 644389A US 3481370D A US3481370D A US 3481370DA US 3481370 A US3481370 A US 3481370A
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Prior art keywords
needle
weft
batten
thread
needles
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US644389A
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English (en)
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Gabriel Bonnard
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United Merchants and Manuf Inc
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United Merchants and Manuf Inc
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D45/00—Looms with automatic weft replenishment
    • D03D45/20—Changing bobbins, cops, or other shuttle stock
    • 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

Definitions

  • the present invention is related to improvements in weft thread selectors, especially for use in weaving systems which use a gripper shuttle, or shuttleless looms.
  • shuttleless looms use a stationary supply of weft thread, which is fed to a weft carrier for passage across the loom.
  • the industry is familiar with modifications of the shuttleless loom which permit a variety of weft-thread types to be used.
  • the threads may vary, according to design principles, for example, in color, texture, or composition.
  • a weft thread selector for false shuttle looms is made up of a fixed assemblage the mounting position of which, on each side of the loom, may be readily regulated.
  • Each assemblage is characterized by a plurality of movable needles, each needle corresponding to a thread of given color or quality.
  • Each needle deposits weft thread in the weft carrier associated with the batten by means of an eyelet provided at the end of each needle proximate the batten.
  • the chosen needle slides from a remote position within the assemblage to an extended position toward the weft carrier and the needles are aligned in a vertical plane parallel to the threads of the warp.
  • Each needle is provided with a fixed operator, for example, a transverse lug for being moved from extended to retracted position by the force of a sliding member which oscillates in unison with the batten.
  • Fastening or retaining means are provided in the assemblage to maintain non-selected needles in a retracted position, that is, the position to which the sliding member pushes all the needles at each striking movement of the batten. Under these conditions it can be seen that any possibility of incorrect movement is suppressed, since the batten itself causes retraction of the needles of the weft thread depositor by positive action on them.
  • the selected needle is advanced in the direction of the weft carrier when the restraining means is inoperative and this motion can be assured either by means of a spring or by a positive action of the sliding member which is joined to the batten, engaging with a catch mechanism system on each needle. In this latter case, operation is completely guaranteed because the movement of the thread-feeding needles is positively controlled by the batten itself, in one direction as well as in the other. This particularly eliminates any risk of faulty operation due to slack in a spring.
  • FIGURE 1 is a plan view showing one side of a weaving loom equipped with a selective weft depositor according to this invention as well as the corresponding end of the batten without the corresponding other side which is provided for alternate operation.
  • FIGURE 2 is a partial cross-section elevation showing the selective weft depositor at the moment when it supplies a thread to the weft carrier.
  • FIGURE 3 is an analogous view showing the batten in the position of striking.
  • FIGURE 4 shows the back end of a needle in a possible alternate embodiment, the catch mechanism of the needle equipped being in a position corresponding to a non-selected needle. This variation is particularly interesting in the case of weft-feeder having a single needle.
  • FIGURE 5 is an analogous view in which the needle is placed in the working position.
  • FIGURE 6 shows another variation of possible operation which is the preferred embodiment of the invention.
  • FIGURE 7 is an analogous view of the same variation showing the selection of another weft depositor needle.
  • FIGURE 8 is a schematic view in elevation, showing the arrangement of the thread depositor according to this invention on the side of the loom where it constitutes a slideable assemblage.
  • the selective -'weft thread selecting and presenting means according to the invention is designed for use on a loom of the type called shuttleless or gripper shuttle, that is to say, one which comprises a weft carrier or gripper 1 having a reciprocating motion in the direction indicated by the double arrow 2 from one side to the other side of the loom, to leave a trailing length of weft thread within the shed.
  • the weft carrier siezes the end of a length of weft thread at one side of the loom and travels on the top of a batten 3.
  • the batten 3 oscillates in the ordinary manner in the direction indicated in FIG- URE 2 by the arrow 4, between a position where the shed is open as in FIGURE 2 and a position of striking where the shed is closed, as in FIGURE 3.
  • the batten 3 is surmounted by a comb 5 and a pre-comb 6 of known type, joined at their top by the cross-bar 7.
  • the selective weft thread depositor is made up of a unitary assemblage A which is mounted at an end of the breast-beam 8.
  • the other end of the breast-beam 8 may be provided with a similar assemblage A.
  • Each assemblage A is made up of a weft control mechanism 9 and a support frame or hous- 3 ing and is also usually equipped with a selvedge gripper 11 and a temple 12.
  • the elements 9, 10, 11, 12 of the assemblage A form an assembled unit, the position of which can be freely regulated by sliding it along the breast-beam 8 in the direction indicated by the double arrow 13. This regulation is effected by using a transverse screw 14 which consequently permits a quick release movement when it is decided to change the width of the length of cloth 15.
  • the support box 10 contains grooves set in fan shape which are directed to converge at a common point 16. This point is situated in the thread receiving and-or gripping groove of the weft carrier when the latter is in front of the thread feeder at the end of its movement.
  • a sliding needle is set in each of the indicated grooves of support box 10. In the illustration given in FIGURES 2 and 3, four needles are shown, and they have been designated respectively by the reference numbers 17, 18, 19 and 20.
  • Each needle is formed of a metal stem having on its foreward end an eyelet 21. Through each eyelet 21 can pass a thread coming from one of a number of stationary weft bobbins (not shown). Any selected thread can be presented to the weft carrier 1 at the desired time.
  • the back portion of each needle i encircled by a compression spring 23 held in each groove between the lug 22, fastened to the needle, and a member, for example a ring 24, afiixed to the support-box 10.
  • a compression spring 23 held in each groove between the lug 22, fastened to the needle, and a member, for example a ring 24, afiixed to the support-box 10.
  • FIGURE 2 only one of the springs 23 has been indicated, but it should be understood that each needle 17, 18, 19 and 20 is provided with one, preferably surrounding its rear portion.
  • each needle, 17, 18, 19 and 20 has, at its rear, a locking notch 25 in which can be caught the transverse lug 26 carried by an oscillating latch 27.
  • Each latch 27 corresponds to one of the needles 17, 18, 19, 20, and these latches are hinged on the fixed support 10.
  • Each latch 27 can swing upward or downward as indicated in FIGURE 2 by the double arrow 28.
  • This motion is controlled by the weft control mechanism 9 which may be of any type known. It may especially be of the dobby board type, a shuttle selector mechanism, or any other system, using electric, electronic, pneumatic, hydraulic etc., selection means. An illustrative mechanical operation of the control mechanism 9 is explained in greater detail below.
  • the connection between Weft control mechanism 9 and latches 27 may be insured by means of connecting rods as described with reference to the embodiment of FIGS. 6 and 7.
  • the assemblage is arranged so that when the latch 27 is at its lowermost position, its lug 26 engages in the notch 25 of the corresponding needle and retains it against the pressure of its spring 23, in the retracted position shown in FIGURE 2 for needles 17, 18, and 19.
  • cross-bar 7 of the batten 3 is provided with a horizontally arranged axle 29 to which is attached a connecting rod 30 which actuates an appropriately guided driving member 31.
  • Member 31 may for instance be guided, as explained below with reference to FIGS. 6 and 7, by being solid with a slide movable in an appropriate slot provided in support box 10, this slide and slot being referenced 47a and 31a in FIGS. 2 and 3.
  • the movements of this member are therefore controlled by movements of the batten 3 itself and are in unison with oscillation of the batten.
  • Member 31 moves parallel to the direction of the warp and substantially parallel to the direction of movement of the weft depositing needles, as indicated in FIG- URE 2 by the double arrow 32.
  • This member 31 is placed adjacent the needles 17, 18, 19 and 20 and at the end of the striking stroke of the batten (FIG. 3), is can bear against all the side lugs 22.
  • the assemblage is of such a size that when the batten 3 is at the striking position (FIG. 3), all lugs 22 are returned to the retracted needle position at which the notches 25 of the various needles can receive the lugs 26 of the selector latches 27. In other words, if a latch 27 is lowered at this instant, its lug 26 lodges in the notch 25 and retains .the needle in question at a withdrawn position against the pressure of its spring 23.
  • latch 27 of needle 20 then remains raised, said needle 20 will return to its extended position, under the action of its spring 23, upon the next oscillation of the batten 3. This will be the case until mechanism 9 lowers the latch 27 associated With needle 20. This last then remains locked at the retracted position as shown in FIGURE 3, and a different needle will present a different thread to weft carrier 1 when mechanism 9 has ordered the raising of another latch 27, for example the one corresponding to needle 18.
  • the working needle is at its most retracted position, when the shed is closed and arrangements can be made in the control mechanism 9 for extension of the working needle on alternate openings of the shed so that it will be in retracted position when the weft carrier is at the other side of the loom from that shown.
  • the needles of the selective thread depositing mechanism are retracted by positive action of element 31 of batten 3, while in contrast they are successively set in extended operating poistion by their spring 23.
  • each needle be driven positively by member 31, in one direction as well as in the other.
  • the rear portion of each needle which is designated by reference number 33, is provided not with a spring 23, but with a horizontal transverse axle 34 disposed in an opening of the needle and on which a rocking latch 35 is pivoted.
  • This latter consists of two arms, of which the one at the rear has a notch 36 on its upper edge. (See FIGURE 5.)
  • the arm of latch 35 which faces batten 3 has a catch 37 on its lower edge. This catch may be engaged by a finger 38 which is fastened to member 31 in this embodiment of the invention.
  • FIGURES 4 and 5 is especially suited for a Weft depositor having a single needle. This embodiment operates as follows:
  • Lug 26 can hold the rocking latch 35 in the rearwardly depressed position of FIGURE 4, against the pressure of spring 39.
  • Catch 37 then remains raised above the movable finger 38, which moves with element 31, in the direction indicated by the arrow 40 or in the reverse direction.
  • the lug 26, engaged in the notch 36 retains the needle in a Well-defined withdrawn position.
  • spring 39 makes latch 35 rock in the direction indicated in FIG- URE 5 by the arrow 41, and as a result of the presence of an inclined surface 42 provided in the front of catch 37, finger 38 lodges under the nose of the catch 37 upon the next return of batten 3 and of member 31 to the striking position.
  • the needle is thus effectively fastened to member 31 through the intermediary of its finger 38, and it accompanies it in its movement, in one direction as well as in another, until lug 26 is again lowered at a time when member 31' is returned to the striking position.
  • the invention thus makes it particularly simple to select colors or other thread variations and maintain great safety in use.
  • cam or other mechanism whatsoever for operating or putting a fresh length of thread in the weft depositor, this operation being accomplished solely by the motion of the batten.
  • a needle can come in front of the weft carrier only if the batten is in the proper position, because the two movements are joined.
  • FIGURES 6 to 8 present a preferred embodiment of the invention, in which member 31 of the batten drives each needle positively in one direction as well as in the other, according to the principles illustrated in FIGURES 4 and 5.
  • this embodiment allows the fingers 38 to move the needles along mutually parallel trajectories. This eliminates the difficulties of practical operation which could result from the fan-like arrangement previously described for needles 17, 18, 19 and 20.
  • Each needle 17, 18, 19 and 20 slides in and out of retracted position passing through a collar 43 which is capable of pivoting freely around a horizontal axis perpendicular to that of the needle in consideration.
  • the rear end of each needle 17, 18, 19 and 20 has a horizontal axle 34 perpendicular to the axis of the needle and on which is pivoted a latch 35.
  • each latch 35 In its front end the latter has a catch 37 which opens preferably upward.
  • the rear arm of each latch 35 contains a lower cam surface 44 extending from the bottom to the top of the latch.
  • a lug 26, carried by a selector latch 27, may act against this cam surface.
  • Each of these latches 27 is joined by an individual connecting rod to an individual oscillating lever 45 provided on the upper part of the control mechanism 9.
  • four needles 17, 18, 19 and 20 are shown as employed and consequently four latches 27 are provided. These four latches are placed at dilferent levels and each is joined to one of the four levers 45 which themselves are all preferably situated side-by-side.
  • the connecting rods which join each lever 45 to its corresponding latch 27 are there fore all of diiferent lengths. They are superposed practically in the projection of FIGURES 6 and 7 and reference number 46 has been used to designate the longest of them which joins one of levers 45 to a latch 27 set at the base of the mechanism, i.e., on
  • the support box 10, in this embodiment, has in its vertical side a number of slots 47 which are generally horizontal and disposed above each other.
  • the transverse axle 34 of each needle 17, 18, 19 and 20 is slideably mounted within one of slots 47 by any appropriate means known in the art, as for instance by being formed with a head slidably received in the said slot which may be of T-shaped configuration.
  • Each lever 45 may be controlled by a frame or dobby mechanism of well-known type which need not be described in detail. This mechanism contains a certain number of rods 48 each of which is joined to one of the control levers 45.
  • the programming member may be one of a variety of known devices, for example, a perforated tape, a continuous series of perforated boards, etc., or a tape or roll containing instructions in any formelectrical, magnetic, optical, etc., perceptible to the sensing element 51 employed in the control mechanism 9.
  • Member 31 is in one with a slide 31a which is movable in an upper additional horizontal slot 47a of the vertical side of support box 10.
  • a lateral flange such as 31b may stiffen the unit 31-31a thus formed.
  • the slot 47 in which needle 20 operates is horizontally aligned with corresponding collar 43 and thus the needle 20 moves in simple rectilinear displacement, indicated by the arrow 52 of FIGURE 6, to put its eyelet 21 in feeding position for the weft carrier.
  • member 31 returns in the direction opposite from the arrow 52, it brings with it needle 20. If, at the time of maximum retraction, the lug 26 of the latch 27 associated with needle 20 has returned to its upper position, brought about by dobby B, the catch 37 will be released from its finger 38 and needle 20 will remain at the retracted position.
  • each needle 17, 18, 19 and 20 can be provided with a stop mechanism capable of positioning it exactly when it stops to give the thread to a gripper shuttle or weft carrier.
  • FIGURE 8 presents the way in which the weft sele'ctor mechanism can be mounted on the side of the loom, in the form of a unit C capable of being moved in the manner of an independent assemblage so as to accomplish the release operations.
  • Batten 3 on which weft carrier 1 moves, oscillates around a shaft 54 turning at half-speed, as is well known.
  • a cam 55 On this shaft 54 there is fixed a cam 55 whose rotation confers a reverse motion to arm 56 of collar 57.
  • This arm 56 is joined by an axle 58 to a rod 59 which is rigidly connected to a rockable shaft 60 extending across the whole width of the loom.
  • This shaft 60 can be fluted or contain at least one longitudinal groove 61.
  • On shaft 60 is mounted a sleeve 62 containing internal grooving or a spline capable of making it rotate with shaft '60, on which it can also slide freely.
  • This sleeve 62 has an arm 63 which through a connecting rod 64 converts the rocking of sleeve 62 to oscillation of a cam 65 around an axle 66 supported by unit C.
  • This cam is provided with a tooth 67 which drives a ratchet wheel 68 for step-by-step control of the rotation of drum 50 of dobby B (see FIGS. 6 and 7).
  • Unit C thus is readily movable as a unit in one operation, permitting sleeve 62 to slide along the shaft 60. It is understood that two units C, one on each side of the loom, are usually provided.
  • the batten of the shuttleless loom operates a slideable member which on each oscillation of the batten serves to bring all the needles of the weft depositor to the retracted position. If the selection mechanism of a control box keeps certain latches at the operative position, the corresponding needles are retained at the withdrawn position, against the force of a spring or other mechanism. On the other hand, a selected needle moves with the element on the return oscillation of the batten and this needle deposits its thread in the weft carrier.
  • the disclosure describes a movement of the needle positively controlled in both directions by the element without the need to provide for springs.
  • a weft thread selecting and presenting means for a shuttleless loom having an oscillating batten comprising a support having a vertical side formed with a plurality of parallel guiding slots; an axle slidable in each of said slots between a first and a second position, said axle being normal to said vertical side of said support; a plurality of weft depositing needles each having a first end and a second end with said second end pivoted on a respective one of said axles so as to be displaced by same; weft thread guiding means at the first end of each of said weft depositing needles; a number of collars each pivotally mounted to said support about a geometrical axis normal to said vertical side thereof, with each of said weft depositing needles being freely slidable through a respective one of said collars, said collars being so disposed with respect to said slots that when any one of said axles is at its second position, the weft thread guiding .means of the corresponding one of
  • said biasing means comprising for each of said catches an arm attached thereto and acting as a counterweight.
  • said reciprocating .means comprising a connecting rod pivotally attached to said driving memher and to the batten of the loom.
  • said biasing means comprising for each of said catches an arm attached thereto and acting as a counterweight; and said controlling means being formed of latches pivoted to said support, each to raise the arm of one of said catches when the one of said axles on which the second end of the weft depositing needle to which said one of said catches is associated, is pivoted, is at its first position.
  • each one of said catches being pivoted on the one of said axles on which the second end of the weft depositing needle to which said one of said catches is associated, is itself pivoted.
  • a weft selecting and presenting means for a shuttleless loom having an oscillating batten comprising slidably supported weft depositing needles, means supporting said needles for slidable movement between an inoperative retracted position and an operative extended position; weft thread guiding means carried by each of said weft depositing needles; a movable driving member mechanically connected with the batten of the loom for moving to and fro in unison with the batten; and means for selectively connecting one of said weft depositing needles with said driving member to bring said one of said needles to its operative extended position and to thereafter return same to its inoperative retracted position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US644389A 1966-06-08 1967-06-07 Selective weft depositors for shuttleless looms Expired - Lifetime US3481370A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR47381A FR1489802A (fr) 1966-06-08 1966-06-08 Perfectionnements aux dispositifs sélecteurs de trame, notamment pour métiers à tisser à fausse navette

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US (1) US3481370A (xx)
BE (1) BE699210A (xx)
CH (1) CH465523A (xx)
DE (1) DE1710309B1 (xx)
ES (1) ES341804A1 (xx)
FR (1) FR1489802A (xx)
GB (1) GB1144832A (xx)
LU (1) LU53791A1 (xx)
NL (1) NL6708001A (xx)
SE (1) SE323337B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006075961A1 (en) * 2005-01-17 2006-07-20 Tape Weaving Sweden Ab Method and apparatus for weaving tape-like warp and weft and material thereof
US20090007981A1 (en) * 2005-01-17 2009-01-08 Nandan Khokar Woven Material Comprising Tape-Like Warp and Weft, and an Apparatus and Method for Weaving Thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3782421A (en) * 1972-06-01 1974-01-01 Rockwell International Corp Weft yarn control device
US3780775A (en) * 1972-08-25 1973-12-25 Rockwell International Corp Weft control mechanism for shuttleless looms
IT1043098B (it) * 1975-10-03 1980-02-20 Somet Soc Mec Tessile Presentatrice della trama per te lai di tessitura ad alimentazio ne continua della trama

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1376747A (fr) * 1963-09-20 1964-10-31 Alsacienne Constr Meca Dispositif mélangeur de trames sur métiers à tisser sans navette
GB1002093A (en) * 1964-01-10 1965-08-25 Webstuhlbau Grossenhain Veb Improvements in or relating to weft change motions for looms having gripper shuttles
US3276482A (en) * 1963-04-10 1966-10-04 Jean Gusken Maschinenfabrik Ei Web thread changing device for web-loom
US3315707A (en) * 1965-01-21 1967-04-25 Scheffel Walter Weft thread changing apparatus in a shuttleless loom
US3342220A (en) * 1964-09-02 1967-09-19 Elitex Zavody Textilniho Weft changing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE542840C (de) * 1929-10-29 1932-10-29 Gabler & Co G M B H J Schusseintragwechselvorrichtung fuer Greiferwebstuehle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276482A (en) * 1963-04-10 1966-10-04 Jean Gusken Maschinenfabrik Ei Web thread changing device for web-loom
FR1376747A (fr) * 1963-09-20 1964-10-31 Alsacienne Constr Meca Dispositif mélangeur de trames sur métiers à tisser sans navette
GB1002093A (en) * 1964-01-10 1965-08-25 Webstuhlbau Grossenhain Veb Improvements in or relating to weft change motions for looms having gripper shuttles
US3342220A (en) * 1964-09-02 1967-09-19 Elitex Zavody Textilniho Weft changing apparatus
US3315707A (en) * 1965-01-21 1967-04-25 Scheffel Walter Weft thread changing apparatus in a shuttleless loom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006075961A1 (en) * 2005-01-17 2006-07-20 Tape Weaving Sweden Ab Method and apparatus for weaving tape-like warp and weft and material thereof
US20080257443A1 (en) * 2005-01-17 2008-10-23 Nandan Khokar Method and Apparatus for Weaving Tape-Like Warp and Weft and Material Thereof
US20090007981A1 (en) * 2005-01-17 2009-01-08 Nandan Khokar Woven Material Comprising Tape-Like Warp and Weft, and an Apparatus and Method for Weaving Thereof
US7992596B2 (en) 2005-01-17 2011-08-09 Tape Weaving Sweden Ab Method and apparatus for weaving tape-like warp and weft and material thereof
US8129294B2 (en) 2005-01-17 2012-03-06 Tape Weaving Sweden Ab Woven material comprising tape-like warp and weft, and an apparatus and method for weaving thereof

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DE1710309B1 (de) 1970-06-25
GB1144832A (en) 1969-03-12
FR1489802A (fr) 1967-07-28
NL6708001A (xx) 1967-12-11
ES341804A1 (es) 1968-07-01
BE699210A (xx) 1967-11-03
LU53791A1 (xx) 1967-07-31
SE323337B (xx) 1970-04-27
CH465523A (fr) 1968-11-15

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