US3782421A - Weft yarn control device - Google Patents

Weft yarn control device Download PDF

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Publication number
US3782421A
US3782421A US00258554A US3782421DA US3782421A US 3782421 A US3782421 A US 3782421A US 00258554 A US00258554 A US 00258554A US 3782421D A US3782421D A US 3782421DA US 3782421 A US3782421 A US 3782421A
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Prior art keywords
yarn
weft
finger
control lever
positioning
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Expired - Lifetime
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US00258554A
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English (en)
Inventor
E Budzyna
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Draper Corp
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Rockwell International Corp
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Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
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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

Definitions

  • a weft yarn control device for looms having a control unit and a mechanism functioning in cooperation [52] US. 139/122 W [5]] Int. D03d 47/38 139/122 W therewith for supporting and guiding a plurality of weft yarns from separate sources of supply and for en- [58] Field of Search.................., etc.
  • weft yarns In the weaving of particular types of fabric, it is desirable to mix the weft yarns by drawing them from separate sources of supply so as to distribute variations therein and give said fabric a uniform overall appearance.
  • weft yarns from different sources of supply pattering effects can be had by utilizing weft yarns of a different color to form stripes, for example, and is accomplished by selecting one color for a given number of picks and subsequently selecting a second and then a third and so on.
  • a striped warp in combination with the mixing of colored weft increases the patterning possibilities substantially by providing unlimited plaid and check pattern effects.
  • Each of thesedevices receives its instructions from a selective control unit and although there are substantial differences for transmitting the selections of respective selective control units, they each utilize a plurality of super-imposed pivotable yarn positioner and guide levers for moving the various weft yarns individual thereto between active and inactive positions.
  • Each of the weft yarns when selected and moved to its active position is acted upon by-Ja socalled yarn depressor, the function of which is to move a selected weft yarn downwardly to a position where the inserting member will engage the weft yarn and carry it into the warp shed.
  • the settings of the super-imposed yarn positioner and guide fingers are very critical. The yarn depressor moves through a predetermined elliptical pathway and theyarn positioner and guide levers must be located so that when their respective yarn is selected it will be moved into the pathway of said yarn depressor.
  • the margin for error for these settings is very slim for if there is too great a distance between these guide levers, the uppermost yarn will not be engaged by the yarn depressor and to close a setting will create an interference between adjacent guide levers causing more than one of the latter to move its weft yarn to a position to be engaged by said yarn depressor.
  • a loss of such tension in anyone or more of the wefts can cause interference with the adjacent wefts to the extent of creating an entanglement between a pair of weft yarns sufficient to cause an unse lected weft yarn to be moved with a selected yarn and carried into the warp shed by the inserting carrier.
  • the weft yarn control device utilizes substantially fewer components and has overcome the undesirable conditions described above which exist with known prior art devices.
  • the mechanism of the invention maintains a substantial separation of the plurality of weft yarns available for selection and insertion into the warp shed.
  • the guide for each weft yarn when selected moves its respective yarn to a position common to the remainder of the yarns when in selected position thereby assuring positive engagement by the yarn depressor for presentation to the inserting carrier.
  • the weft yarn control device of the present invention includes a plurality of slidable weft guide elements selectively and separatey movable by a pattern control unit.
  • the commands of the control unit are transmitted to the weft guide element, in accordance with a predetermined pattern, by separate interconnecting linkages individualto each of said guide elements.
  • One end of each guide element is interconnected by its respective linkage to the pattern control unit and the opposite ends are provided with guiding eyelets through which single weft threads from separate sources of supply are adapted to extend.
  • the guide element for each weft yarn when selected moves in a longitudinal direction which places its guiding eyelet and respective weft yarn in a position common to each of the other guiding eyelets and their respective wefts when selected.
  • the device maintains a proper amount a separation between the individual weft yarns and assures precise positioning when selected for pickup by the inserting carrier.
  • a further object of the invention is to provide a weft yarn control device which while moving any one of a plurality'of available weft yarns to a common active position, will move any one of the previously selected weft yarns to its inactive or storage positions.
  • a further and more specified object of the invention is to provide an improved weft control for looms of simplified construction, one that is relatively inexpensive to manufacture and with long life expectancy.
  • FIG. 1 is a perspective view of a portion of the right hand side of a loom showing the device according to the invention applied thereto,
  • FIG. 2 is a front elevation showing the means for slidably supporting the plurality of weft guide elements
  • FIG. 3 is a side elevation, partially in section, of the supporting means in FIG. 2 showing by means of solid lines a weft guide element in operating position and by means of phantom lines the same in weft storage position,
  • FIG. 4 is a perspective view of the pattern control unit for selectively moving the weft guide elements between their operating and weft storage positions, and
  • FIG. 5 is a side elevation showing further detail of the pattern control unit in FIG. 4.
  • FIG. I a weft inserting carrier is shown at and is fixed to the end of a flexible tape 11 which moves through a tape guide 12 and which is wrapped about and unwrapped from a tape wheel within a housing 13 disposed at the side of the loom. While this invention will be described in connection with a tape type shuttleless loom, it is to be understood that it can also be used effectively with other types of shuttleless looms.
  • Warp yarns 14 pass through a conventional harness arrangement 15 that is effective to form shed openings 16 into which the inserting carrier 10 enters to carry with it any one of a plurality of weft yarns identified in FIG. 1 by Y-l, Y-2, Y-3 and Y4.
  • the usual form of reed 16' carried on a reciprocating lay beam (not shown) serves to beat each inserted length of weft into the fell of the fabric.
  • Each of the weft yarns Y-l, Y-2, Y-3 and Y-4 is drawn from a separate source (not shown) and passed through individual tensioning devices, one of which is shown in FIG. 1 for weft yarn Y-2 and is identified by numeral 17. From the tensioning devices the weft yarns extend to and pass through a weft yarn detector 18 which will upon breakage or absence of any one of said yarns cause the loom to stop.
  • a weft yarn positioner forming a part of the invention is provided and is identified generally by numeral 19.
  • This weft yarn positioner as shown in FIGS. 1, 2 and 3 includes a support housing 20 with arcuated top and bottom surfaces 21 and 22 respectively that are interconnected by tapered sides 23 and 24.
  • a housing cover 25 of the same general configuration as housing 20 is attached to the latter by means of screws 26.
  • a plurality of spring biased yarn positioner fingers are slidably carried within the support housing 20 and as shown in FIG. 2 are identified by numerals 27, 28, 29 and 30.
  • each yarn positioner finger has a linkage element in the form of a Bowden Wire 31 fixed thereto which extends generally upwardly and through a guide fitting 32 assembled in the arcuated top 21 of the support housing 20. From the guide fittings 32 each of the Bowden Wire linkages extend to and are caused to be actuated by a pattern control unit that is depicted generally in FIGS. 1 and 4 by numeral 33, and will be more fully described hereinafter.
  • each yarn positioner finger 27, 28, 29 and 30 is provided with an integrally formed weft yarn guide eyelet 34 through which weft yarns Y-l, Y-2, Y-3 and Y-4, respectively, extend.
  • the yarn positioner finger 29 is in operating position with its weft yarn Y-3 extending to the shed opening 16.
  • the remaining three yarn positioner fingers 27, 28 and 30 are retracted and are holding their respective weft yarns in the weft storage position. When in this position, the ends of the stored weft threads are held by the combined thread cutter and binder device shown at 35.
  • the lower portion of the support housing 20 is provided with guide channels 36 for each of the yarn positioner fingers 27, 28, 29 and 30, the channels being disposed in such a way that the yarn eyelets 34 of each of said fingers is located at substantially the same location when located in operating position.
  • a outwardly extending stud 37 is fixed to each yarn positioner finger intermediate the ends thereof and is situated so as to protrude outwardly through a slot 38 provided in the housing cover 25.
  • Springs 39 provide the means for biasing each yarn positioner finger toward its operating position by having one end thereof attached to a stud 37 and the opposite end to an integrally formed ear 40 at the lower end of the housing cover 25.
  • the pattern control unit 33 for effecting selected actuation of each of the yarn positioner fingers is of box-like structure having spaced plate-like side walls 41 and 42 and a planar bottom member 43.
  • This bottom member 43 serves as a means for attaching the unit by any suitable means (not shown) to the frame 44 of the loom (FIG. 1).
  • the pattern control unit 33 is actuated by a drive shaft 45 which is operatively connected to any suitable source of rotary motion on the loom (not shown).
  • the drive shaft 45 has fixed thereon a drive gear 46 which is meshed with gear 47 to rotate shaft 48 in the direction indicated by arrow 49.
  • Shaft 48 is journaled in aligned openings provided in the side walls 41 and 42 of the pattern control unit 33.
  • shaft 48 Immediately adjacent to the driven gear 47 shaft 48 has mounted thereon a gear 50 which is effective in transmitting the rotary movement of shaft 48 to a gear 51 via an intermediate idler gear 52.
  • Gear 51 is fixed on a shaft 53 which is also journaled in aligned openings provided in the side walls 41 and 42 of the pattern control unit 33.
  • Both shaft 48 and shaft 53 are provided with cam members intermediate their ends for actuating the various elements within the pattern control unit and thereby selectively moving any one of the yarn positioner fingers between operating and storage positions.
  • FIG. 5 illustrates the means for actuating a single yarn positioner finger while simultaneously deactivating :another.
  • a pattern drum is shown at 54 which carries a perforated pattern tape 55 and is adapted to advance this tape to control patterning.
  • this pattern drum is fixed on and caused to rotate with a shaft 56 that extends outwardly from within unit 33 and beyond its side wall 42.
  • shaft 56 In close proximity with the outer side wall 42 shaft 56 has a notched driven wheel 57 fixed thereon which in timed relation to the weaving cycle is caused to be indexed one notch by a single toothed drive wheel 58.
  • this single toothed drive wheel 58 is rotated in the direction of the indicating arrow 59 by that portion of shaft 48 which extends outwardly beyond side wall 42.
  • a locking arm 60 having a roller member 61 is provided.
  • This locking arm 60 is pivotally supported on a stud 62 and by means of a torsion spring 63 said locking arm is biased in a direction to continuously urge its roller member 61 into meshing relation with the notches of the drive wheel 57, thereby restricting further rotative movement thereof until again indexed.
  • a rod member 64 is fixed between the walls 41 and 42 and is adapted to support for pivotal movement a plurality of double armed levers generally indicated by numeral 65.
  • a plurality of double armed levers 65 there are two of these double armed levers 65 for each yarn positioner finger one of which is effective in initiating movement of a finger to operating position and the other of which is effective to move a finger to the yarn storage position.
  • Each double armed lever includes a generally horizontally disposed first arm 66 and a downwardy extending second arm 67.
  • a pattern sensing rod 68 is attached to the end of each first arm 66, as at 69, and extends downwardly through a rod guide member 70. The lower ends of the sensing rods contact the pattern tape 55.
  • a coil spring 71 having one end attached to the first arm 66 and its opposite end to the rod guide member 70 as at 72 provides a biasing force that continually urges the double armed levers in a counter-clockwise direction as viewed in FIG. 5.
  • the pattern drum 54 is of conventional design and includes the usual circumferentially disposed grooves (not shown) which allow a sensing rod 68 to enter a pattern perforation a distance sufficient to obtain the required pivotal movement of the second arm 67.
  • the lower end ofthe second arm 67 extends through an opening (not shown) in a slide bar 73 that is horizontally slidable within the limits of a slide bar housing 74.
  • Each slide bar 73 includes a second opening (not shown) through which a generally vertically disposed push rod 75 may extend. These push rods 75 are supported for longitudinal movement adjacent their upper ends by a guide member 76.
  • Elevator bar 78 is carried on one end of a lever 79 which adjacent its opposite end is pivotally assembled on rod member 80.
  • a cam follower 81 is assembled by means of a bolt 82.
  • the cam follower 81 is held in contact with the outer periphery of cam 83 fixed on shaft 48 by means of a coil spring 84.
  • One end of spring 84 attaches to a retainer bar 85 and its opposite end to a retainer clip 86 which assemblies on lever 79 by means of a screw 87.
  • Rotation of shaft 48 and cam 83 carried thereon effect continuous pivotal movement of lever 79 and the raising and lowering of the elevator bar 78.
  • the elevator bar 78 is moving upwardly, the push rods 75 which have been moved from the rod support 77 onto said bar will also be raised.
  • the perforations in the pattern tape are arranged in aligned pairs so as to effect pivotal movement of two levers 65 and the movement of two push rods 75 from the rod support 77 onto the elevator bar 78.
  • the raising of two push rods 75 effects the required simultaneous movement hereinbefore referred to wherein one push rod initiates the selected movement of a yarn positioner finger to its operating position while the other is effective in the moving of a previously selected finger to its yarn storage position.
  • a plurality of selector levers 88 are pivotably supported at one end on a rod 89 (FIG. 5).
  • the opposite ends of these selector levers 88 extend through and beyond a slotted guide bracket 98 (FIG. 4) which is attached to the forward upper end portion of side walls 41 and 42 by such means as screws 91 (one only shown).
  • Those ends of the selector levers 88 which extend forwardly beyond. the slotted guide bracket are provided with adjustable linkage connectors 92 and are pivotably carried on said levers by means of pins 93.
  • the number of selector levers 88 and the adjustable linkage connectors 92 carried thereby are equal in number to the number of yarn positioner fingers 27, 28, 29 and 30.
  • the lower end of each of the adjustable linkage connectors 92 has a Bowden Wire 31 attached thereto as at 94, thus providing a direct connection between each selector lever 88 and a yarn positioner finger slidably carried in the support housing 28.
  • the individual Bowden Wires extend through guide fittings 95 assembled in a shelf bracket 96, which, in turn, is suitably attached to the pattern control unit 33 below the adjustable linkage connectors 92.
  • Individual coil springs 97 provide a biasing force on each of the selector levers 88 which continually urges them toward their solid line positions shown in FIG. 4.
  • the upper end of each spring 97 attached to its respective selector lever as at 98 and the opposite ends thereof are attached to the retainer bar 85 as at 99.
  • an adjustable stop screw 100 is provided for each of said levers and these screws are carried in alignment with the latter by a support bar 101 which is also attached by means of screws 91 to side walls 41 and 42.
  • each selector lever 88 there is provided a substantially v-shaped latching lever indicated generally by numeral 102 that is pivotally supported on a rod 103.
  • This latching lever includes a rearwardly extending first finger 104 and generally vertically extending second finger 105 and as shown in FIG. is biased in a counter-clockwise direction by a coil spring 106.
  • One end of coil spring 106 connects to the upper end of the second finger 105 and its opposite end to a slotted retainer braket 107 which attaches to the upper end of side walls 41 and 42 by means of screws 108 (one only shown in FIG. 4).
  • the upper portion of the second finger 105 of the latching lever 102 is of lesser width than the lower portion and defines a shelf 109 which is operatively associated with a laterally extending stud 110 disposed intermediate the ends of each selector lever 88. Stud 110 when in the phantom line position shown in FIG. 5 is effectve in holding the selector lever individual thereto in its uppermost position which is also shown by phantom lines. When stud l is in the solid line position as shown in FIG. 5 its respective selector lever is caused to be pivoted downwardly by the action of coil spring 97 seeking to return to its free length. Both the selector lever and the latching levers are actuated by the push rods 75 and will be described in further detail hereinafter.
  • a clearing cam 111 is fixed on and caused to rotate with shaft 53.
  • a cam follower 112 rotatably supported by an arm 113 is caused to maintain frictional contact with the outer periphery of cam 111 by means of a coil spring 114.
  • One end of this spring attaches to the retainer bar 85 and its opposite end to the arm 113.
  • Arm 113 is fixed on a shaft 115 which is mounted for oscillating movement in accordance with the dictates of the clearing cam 111.
  • a second arcuated arm 116 is also fixed for oscillating movement on shaft 115 and, depending from the latter, its lower end terminates in the form ofa hub 117 in which is fixed a laterally extending clearing rod 118.
  • the pattern drum 54 with its pattern tape 55 is incrementally advanced in timed relation to the weaving cycle.
  • the perforations in accordance with some predetermined patternare arranged in pairs on the pattern tape so that when a pair of said perforations come into alignment with two of the sensing rods 68, the latter through action of springs 71 will be caused to enter therein.
  • This motion pivots the two levers 65 associated with the sensing rods in a counter-clockwise direction causing their respective slide bars 73 to move in a direction which slides the lower ends of two respective push rods from the rod support 77 onto the elevator bar 78.
  • the elevator bar is raised by cam 83 which also raises the two selected push rods 75.
  • the clearing cam is timed to move the clearing rod 118 in a direction which through its association with levers 65 and slide bars 73 moves the selected push rods back to their initial position on the rod support 77. This motion also lifts the sensing rods 68 to permit indexing of the pattern drum.
  • the loom will continue to weave with weft yarn from the selected yarn positioner finger until another pair of perforations come into alignment with the sensing rods 68 at which time the cycle will again be repeated.
  • a plurality of yarn positioning fingers including means'enabling each finger to operatively engage its associated yarn
  • said mounting means being constructed in such a way that the yarn engaging portion of each of said positioning fingers is located at substantially the same location when in said operating position;
  • said individual operating means including a separate control lever'operatively associated with each said yarn positioner finger and individual latching means operatively associated with each said control lever for locking the latter and its respective yarn positioner finger in the storage position and releasing the same to the operating position; independent and selectively controlled linkage members for each said control lever and latching means with actuating means for effecting simultaneous movement of a selected control lever and a selected latching means whereby said selected lever and its associated yarn positioning finger are moved toward storage position while releasing another control lever operatively associated with said selected latching means to operating position in accordance with the dictates of said operating means.
  • said independent and selectively controlled linkage members comprise a generally vertically disposed and slidable push rod for each control lever and latching means.
  • said operating means further comprises a cam controlled elevator arm for simultaneously raising a selected pair of said push rods into operative engagement with the control lever and latching means operatively associated therewith.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00258554A 1972-06-01 1972-06-01 Weft yarn control device Expired - Lifetime US3782421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25855472A 1972-06-01 1972-06-01

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US3782421A true US3782421A (en) 1974-01-01

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Application Number Title Priority Date Filing Date
US00258554A Expired - Lifetime US3782421A (en) 1972-06-01 1972-06-01 Weft yarn control device

Country Status (13)

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US (1) US3782421A (fr)
JP (1) JPS4941670A (fr)
BE (1) BE800397A (fr)
BR (1) BR7304038D0 (fr)
CA (1) CA981152A (fr)
CH (1) CH555911A (fr)
DE (1) DE2327701A1 (fr)
ES (1) ES415170A1 (fr)
FR (1) FR2186558B1 (fr)
GB (1) GB1387243A (fr)
IN (1) IN139187B (fr)
IT (1) IT985120B (fr)
NL (1) NL7307688A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111007A (en) * 1976-11-26 1978-09-05 Silver Seiko Ltd. Yarn changing device in a flat-bed knitting machine
EP0293558A1 (fr) * 1987-04-03 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Sélecteur de trame pour un métier à tisser
FR2636979A1 (fr) * 1988-09-27 1990-03-30 Marsande Petrus Dispositif d'alimentation des fils de trame pour metiers a tisser sans navette
EP0676493A1 (fr) * 1994-04-05 1995-10-11 PANTER S.r.l. Dispositif de présentation de fil de trame pour métiers à tisser
US6575200B2 (en) * 1998-05-05 2003-06-10 Robosoft N.V. Weaving machine and method for manufacturing fabrics with pattern-forming weft threads such as Kelim or Gobelin fabrics
US20040129333A1 (en) * 2003-01-07 2004-07-08 Hiram Samel Method for weaving floor coverings

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548886A (en) * 1967-07-28 1970-12-22 Snam Progetti Device for selecting and presenting in any order different weftthreads in continuous feed looms
US3565121A (en) * 1968-05-30 1971-02-23 Elitex Zavody Textilniho Weft selecting and presenting apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
FR1489802A (fr) * 1966-06-08 1967-07-28 Perfectionnements aux dispositifs sélecteurs de trame, notamment pour métiers à tisser à fausse navette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3548886A (en) * 1967-07-28 1970-12-22 Snam Progetti Device for selecting and presenting in any order different weftthreads in continuous feed looms
US3565121A (en) * 1968-05-30 1971-02-23 Elitex Zavody Textilniho Weft selecting and presenting apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111007A (en) * 1976-11-26 1978-09-05 Silver Seiko Ltd. Yarn changing device in a flat-bed knitting machine
EP0293558A1 (fr) * 1987-04-03 1988-12-07 GebràœDer Sulzer Aktiengesellschaft Sélecteur de trame pour un métier à tisser
US4852618A (en) * 1987-04-03 1989-08-01 Sulzer Brothers Limited Weft yarn selector for a loom
FR2636979A1 (fr) * 1988-09-27 1990-03-30 Marsande Petrus Dispositif d'alimentation des fils de trame pour metiers a tisser sans navette
EP0362089A1 (fr) * 1988-09-27 1990-04-04 Pétrus Marsande Dispositif d'alimentation des fils de trame pour métiers à tisser sans navette
EP0676493A1 (fr) * 1994-04-05 1995-10-11 PANTER S.r.l. Dispositif de présentation de fil de trame pour métiers à tisser
US6575200B2 (en) * 1998-05-05 2003-06-10 Robosoft N.V. Weaving machine and method for manufacturing fabrics with pattern-forming weft threads such as Kelim or Gobelin fabrics
US20040129333A1 (en) * 2003-01-07 2004-07-08 Hiram Samel Method for weaving floor coverings

Also Published As

Publication number Publication date
DE2327701A1 (de) 1973-12-20
BE800397A (fr) 1973-10-01
IN139187B (fr) 1976-05-22
GB1387243A (en) 1975-03-12
BR7304038D0 (pt) 1974-07-25
NL7307688A (fr) 1973-12-04
FR2186558A1 (fr) 1974-01-11
FR2186558B1 (fr) 1976-05-07
CA981152A (en) 1976-01-06
IT985120B (it) 1974-11-30
JPS4941670A (fr) 1974-04-19
CH555911A (de) 1974-11-15
ES415170A1 (es) 1976-02-16

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