US3450169A - Selvedge forming device in shuttleless looms - Google Patents

Selvedge forming device in shuttleless looms Download PDF

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Publication number
US3450169A
US3450169A US632798A US3450169DA US3450169A US 3450169 A US3450169 A US 3450169A US 632798 A US632798 A US 632798A US 3450169D A US3450169D A US 3450169DA US 3450169 A US3450169 A US 3450169A
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United States
Prior art keywords
arm
shed
selvedge
thread
loom
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Expired - Lifetime
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US632798A
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English (en)
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Ramon Balaguer Golobart
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Individual
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Individual
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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
    • D03D47/40—Forming selvedges
    • D03D47/46—Forming selvedges by selvedge shuttle or other device passing selvedge thread through loop of weft
    • 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
    • D03D47/40—Forming selvedges

Definitions

  • the present invention relates to a selvedge forming device in shuttleless looms, especially for looms producing two parallel fabrics at a time which comprises two sets of warp threads for forming two superimposed sheds, weft thread inserting elements, a loom slay for beating up the weft threads, and supplemental independent thread for the formation of the selvedges of the fabrics.
  • selvedge forming devices are based on a hook carrying a supplemental independent thread and introducing the same in a loop-like form between the outer warp threads of the shed,-Where it is retained by a pin actuating in opposition to the hook.
  • selvedge forming devices producing socalled false selvedges, in which the selvedges are formed without supplemental independent threads by the alternative crossing in different senses-of the outer Warp threads and their interlacing with the weft thread, as well as selvedge forming devices based on grippers, hooks, or brushes which introduce the protruding ends of the Weft threads into the shed, either mechanically or by an air current.
  • the selvedges formed by supplemental independent threads have better consistency.
  • the present invention improves these systems of forming selvedges with supplemental independent threads.
  • the supplemental independent thread is guided by a hook which has to move a considerable distance until the supplemental thread is reached by the pin which re tains it during the return travel of said hook to its starting point and the advance movement of the loom slay for being clamped on the forming line of the fabric.
  • a further advantage of the selvedge forming device according to the present invention is that it allows for severing automatically the weft thread at the border of the fabric and to adjust the severing in such a way, that the protruding end may have any desired length.
  • the said device resolves the selvedge formation in two parallel fabrics at a time, it may also be used for the selvedge formation in one single fabric, as will be explained hereinafter.
  • the device according to the invention is essentially characterized in that it comprises two angularly bent pivotally mounted superposed plates, the upper one, provided with a hole at one end for the passage of the supplemental independent thread and with a small adjustably fixed knife for cutting the weft thread, being connected through its other end to a sheetlike support member secured to a main shaft of the device.
  • the lower angularly bent plate provided with a notch at one end for retaining the supplemental independent thread at the selvedge, is secured at its other end to a secondary freely rotating shaft, coaXially arranged with respect to the said main shaft of the device, the whole being arranged near the outer warp thread of the loom and connected through a cam means to a rotary shaft of the loom in such a manner that the said upper angularly bent plate is actuated by a reciprocating swinging motion through the said main shaft of the device, pulling with itself, in one direction of the said reciprocating motion, the lower angularly bent plate to the selvedge of the fabric for introducing a loop of the supplemental independent thread into the shed between the outer warp threads against the action of a spring means and in synchronism with the insertion of the weft thread into the shed by the weft inserting element, the inserted Weft thread being severed by the knife at the beginning of the return travel of the upper angularly bent plate, while the lower
  • the selvedge forming device is further characterized in that the upper angularly bent plate is firmly secured to the main shaft of the device, so that its return movement to the starting position is caused by the return rotation of the shaft, while the lower angularly bent plate is maintained in its advanced position by means of the pressure of the spring means, so that its notch retains the loop of the supplemental independent thread in the selvedge, the return movement of said lower angularly bent plate being caused by an element provided on the loom slay and adapted to strike during its advance movement against a nose of the lower angularly bent plate, thus discharging the spring means.
  • the shed is closed in conventional manner, whereby the loop of the supplemental independent thread introduced between the outer warp threads of the selvedge is beaten up simultaneously with the weft thread of the preceeding passage. Thereafter, the angularly bent plates initiate a further cycle of movements for the formation of the selvedge of the next Weft thread insertion.
  • FIG. 1 is a schematic front view of the device arranged near the selvedge at the feeding side of a loom for producing one single fabric.
  • FIG. 2 is a schematic front view with parts in section of the same device on an enlarged scale.
  • FIG. 3 is a schematic front view of the device arranged near the selvedge at the feeding side of a loom for producing two parallel fabrics at a time.
  • FIG. 4 is a schematic perspective view of the device corresponding to FIG. 3.
  • FIGS. 5, 6, 7, 8, 9, 10, 11 and 12 are schematic plan views showing the device in difierent positions.
  • FIGS. 1 and 2 The device itself, FIGS. 1 and 2, comprises a support member 1 fixed to a stationary frame part of the loom at the feeding side of the weft thread by means of the screws 2 and 3.
  • This support member 1 is provided with a bore through its entire length for the passage of a main shaft 4 rotatably guided by means of the bearings 5 and 6.
  • a lever arm 8 At the protruding lower end 7 of this main shaft 4, there is provided a lever arm 8 having two bushes 9 and 10 at its ends, the protruding lower end 7 of the main shaft 4 being secured to the bush 9 of the lever arm 8 by means of a screw 11.
  • the bush 10 of the lever arm 8 carries a roller 12 sliding on a cam 13 fixed on a rotating shaft 54 of the loom.
  • a helical spring 14 which surrounds the bush 9 of the lever arm 8, the short leg 15 of said helical spring 14 being inserted into the base 16 of the support member 1, and the long leg 17 engaged with and exerting a lateral pressure on the arm 8.
  • the head 18 of the main shaft 4 is constituted by a tubular extension 19 of larger diameter and containing an independent secondary shaft 20 of smaller diameter than the main shaft 4.
  • This secondary shaft is rotatably guided in the bearings 21 and 22 carried by the tubular extension 19.
  • an angular wing-like projecting part 24 To the outer part 23 of this independent secondary shaft 20 of smaller diameter, there is secured an angular wing-like projecting part 24, the upper portion 25 of which carries the angularly bent retaining arm 26 provided with a notch, fixed thereto by means of a screw 27.
  • To the lower portion 28 of the said wing-like projecting part 24 there is secured by means of a screw 29 an element 30 having a nose 31 at its free end.
  • spring 33 acts with an over-the-center snap action to urge the retaining arm towards one or the other of two extreme positions; the arm shown as fully withdrawn from the shed in FIGS. 5 and 12 and in its fully inserted position in FIGS. 6-10.
  • FIG. 11 the withdrawing movement, in a counterclockwise direction, has begun and the arm is about to reach the point at which the spring 33 will cause the arm to snap towards its fully withdrawn position as shown in FIG. 12.
  • FIG. 5 shows in a schematic plan view the starting position corresponding to the position of the device is illustrated in FIG. 1.
  • the supplemental independent thread 42 passes through the hole 43 in the inserting arm 39 provided with the small knife 41.
  • the said supplemental independent thread 42 proceeding from a bobbin (not shown), passes through a tension device 44, and the inserting arm 39 and the retaining arm 26 are prepared to initiate the formation of the loop of the supplemental independent thread 42 by an arc-like advance movement towards the selvedge.
  • Apparatus for forming a selvedge at the side of a fabric woven on a shuttleless loom by means of an independent thread comprising an inserting arm provided with a hole for carrying the independent thread into the shed and a knife for severing a weft thread gripped by an inserting means of the loom, a retaining arm for holding the independent thread carried into the shed by the inserting arm, means for mounting both said arms on a loom for reciprocatory pivotal movement into and out of the shed, means for connection with a loom for moving both said arms into the shed together for inserting the independent thread and severing an inserted weft thread, for moving the inserting arm out of the shed alone while the retaining arm remains in the shed and for moving the retaining arm out of the shed before the slay completes beating up the inserted weft thread.
  • said means for moving both said arms includes cam means for connection with the rotating element of a loom and a lever arm fixed on one of said shafts for operative engagement with the cam means.
  • said means for moving both said arms includes a projecting element on the inserting arm for initiating movement of the retaining arm towards the shed, and an element on the slay for initiating movement of the retaining arm out of the shed.
  • said means for moving both arms also includes an element on the slay for initiating movement of the retaining arm out of the shed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US632798A 1966-05-04 1967-04-21 Selvedge forming device in shuttleless looms Expired - Lifetime US3450169A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES32673266 1966-05-04

Publications (1)

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US3450169A true US3450169A (en) 1969-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
US632798A Expired - Lifetime US3450169A (en) 1966-05-04 1967-04-21 Selvedge forming device in shuttleless looms

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US (1) US3450169A (de)
CH (1) CH455661A (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116762A (en) * 1961-02-03 1964-01-07 Brelic Internat Inc Selvedge-forming device for shuttleless looms
GB950942A (en) * 1959-06-18 1964-03-04 Victor Marie Joseph Ancet Improvements in shuttleless looms
US3137321A (en) * 1962-02-12 1964-06-16 Seydoux Et Michau Ets Weft end tucking means
US3229724A (en) * 1963-01-21 1966-01-18 Brelic Internat Inc Selvedge-forming mechanisms for shuttleless weaving looms and the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB950942A (en) * 1959-06-18 1964-03-04 Victor Marie Joseph Ancet Improvements in shuttleless looms
US3116762A (en) * 1961-02-03 1964-01-07 Brelic Internat Inc Selvedge-forming device for shuttleless looms
US3137321A (en) * 1962-02-12 1964-06-16 Seydoux Et Michau Ets Weft end tucking means
US3229724A (en) * 1963-01-21 1966-01-18 Brelic Internat Inc Selvedge-forming mechanisms for shuttleless weaving looms and the like

Also Published As

Publication number Publication date
CH455661A (de) 1968-07-15

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