US3455342A - Selvage trimming and waste removal means - Google Patents

Selvage trimming and waste removal means Download PDF

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Publication number
US3455342A
US3455342A US651857A US3455342DA US3455342A US 3455342 A US3455342 A US 3455342A US 651857 A US651857 A US 651857A US 3455342D A US3455342D A US 3455342DA US 3455342 A US3455342 A US 3455342A
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jaws
weft thread
jaw
weft
support
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Expired - Lifetime
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US651857A
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English (en)
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Ramon Balaguer Golobart
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads
    • 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
    • D03D47/125—Weft holding devices
    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3066—Control or handling of the weft at or after arrival
    • D03D47/308—Stretching or holding the weft

Definitions

  • ABSTRACT OF THE DISCLOSURE Device for fastening and cutting the weft thread in shuttleless looms and removing the cut surplus thereof, having a pair of members for gripping the weft thread, a knife member for cutting the end of the thread and a pipe for sucking away the cut-off end, the whole constitut- 1ng a unit in which the different operations are carried out automatically in complete synchronism with the movements of the loom.
  • This invention relates to improvements in devices for cutting the weft thread by gripping it, positioning it for cutting and sucking away of the cut surplus thread, which are applicable to shuttleless looms having weft inserters of the gripper type, for mounting at the edge of thefabric, and which comprise a member for clamping the weft thread, a member 'for cutting the surplus of the latter and a pipe for sucking away the cut-off end.
  • This invention is an improvement which excludes completely the risk that the previous systems ran of losing the necessary synchronism in the different operations, since all these operations are produced automatically and in unison, excluding therefore the risk or failures in the operations mentioned.
  • the clamping member of the weft thread is constituted by two gripper jaws, a lower one and an upper one, having respective tubular sections and articulated conjointly with these sections on a stationary support in such a way that they can effect an oscillatory movement so that when said jaws open, the said two tubular sections also open, and that when said jaws close, to catch the weft thread, the said tubular sections also close forming a complete tubular unit with a tubular extension associated with one of said sections and connected to the suction pipe, one of said jaws being controlled, with the members associated with it, by means of mechanical members in dependence on the movements of the loom, while the other of said jaws is subjected to the action of a spring which, acting in the closure direction of the same, tends to keep it applied against a stationary check member, and the said upper and lower jaws being arranged in such a position in respect of a rotary cutting member and the said ice stationary check member that, when said jaws are situated in the closed position
  • the stationary support carrying the jaws and members associated with them is constituted by a basic component firmly attached to a stationary member of the loom by means of an element adjustable in the transverse direction of the latter, an intermediate component, joined to said basic component through a substantially horizontal slideway, and an upper component, which constitutes the support proper of said whole, joined to said intermediate component through a substantially vertical slideway, said adjustable element and the said horizontal and vertical slideways being adapted to adjust the position of the said whole in relation to the line of formation of the fabric, both in horizontal and vertical directions.
  • FIGURE 1 is a perspective view of the device applied to a fixed shaft of the loom
  • FIGURE 2 is a rear view of the fastening and sucking elements
  • FIGURE 3 shows the device with the jaws open waiting for the weft thread to be gripped and in the downward position
  • FIGURE 4 shows the device with the jaws closed gripping the weft thread and in the half-raised position
  • FIGURE 5 shows the device with the jaws closed gripping the weft thread and in the fully raised position and positioning for cutting
  • FIGURE 6 is a perspective view of a part of the loom to which the device is applied, combined with a cutting element.
  • FIG. 1 denotes a fixed shaft comprising a portion of the frame of the m, to which there is firmly applied, by means of the bolt 2 and the sleeves 3, the basic support 4 for the device at the upper end 5 of Which there is a substantially horizontal slideway 6, to which there is fixed, in an adjustable manner, an intermediate support 7 having a projecting portion movable in the slideway and attached by means of the bolt 8.
  • Said intermediate support 7 carries another, substantially vertical slideway 9, to which there is fixed, also adjustably, an upper support 10 having a projecting portion movable in slideway 9 and attached by means of the bolt 11, all these supports forming, once adjusted, at single, general support.
  • the entirety of the fastening and sucking elements is pivotally attached on a horizontal axis to the upper support 10, these elements comprising: a lower jaw 12 joined with an upwardly facing hemi-cylindrical section 13, an upper jaw 14 joined with a downwardly facing hemicylindrical section 15 which complements the section 13, a tubular extension 16 of said half section 13 and a suction pipe 17 connected to the tubular extension 16, the extensions 13 and 15 being pivotally mounted like jaws on a shaft 18 of the upper support 10, by means of a lower arm 19 for the lower tubular section 13 and by an upper arm 20 for the upper tubular section 15.
  • the upper jaw 14 attached to the upper tubular section 15 is in a practically horizontal position, subjected to the constant downward pressure of the lug 21 of the helical spring 22, FIGURE 1, which surrounds the support shaft 18, the other end of the spring (not shown) being attached to a ring 23 mounted on shaft 18 which adjusts the pressure of the spring 22 and is fastened by a set screw 24.
  • the basic support 4 has a lower end 28, at which there is pivotally connected, by means of a shaft 29, a swivelling plate 30 of triangular shape which at its lower vertex 31 has a roller 32, which receives the upward and downward movement of a cam 33 applied by a fixing bolt 34 to a rotating shaft 35 of the loom.
  • a conpler 37 At the vertex 36 of the triangular-shaped plate 30 there is applied a conpler 37 through which passes a connecting rod 38 fastened by the screw 39 and the upper end 40 of which is connected to the lower arm 19 of the lower tubular section 13 supporting the movable loWer jaw 12.
  • FIGURE 6 shows the jaws 12 and 14 of the device gripping the end 55 of the weft thread 48 arranged so that it can be beaten up by the reed 49 of the slay 50 and be cut by the disc or circular knife 51, only two warp threads 52 and 53 having been shown for clarity in the drawing, but it is to be understood that the remaining warps correspond to the continuity of the fabric 54 shown only partly.
  • the weft thread 48 inserted in the shed before being beaten up by the reed 49 of the slay 50, has its loose end drawn, by suction from the tubular extension 16 and the two tubular half sections 13 and 15, between the two open jaws 12 and 14, FIGURES 1 and 3.
  • the cam 33 On account of the continuity of the rotation of the cam 33, it pushes the roller 32 and the vertex 36 of the triangular shaped plate 30 upwardly, closing the lower jaw 12 with the upper one 14 and catching with it the end 55 of the weft thread 48, FIG- URES 4 and 6.
  • the cam 33 continues to rotate and due to its protuberance 56 causes the continuation of the elevation of the roller 32 of the triangular shaped plate 30, and therefore, of the lower jaw 12, which, without ceasing to grip the end 55 of the weft thread 48 between the two jaws, 14 and 12, by the constant pressure of the spring 22, also causes the elevation of the upper jaw 14, FIGURE 5, with which the end 55 of the weft thread 48 is brought within reach of the cutting edge of the rotary knife 51, FIGURE 6, so as to be cut.
  • the cam 33 continues to rotate in a clockwise direction, causing in the first place the jaws 12 and 14 to descend, closed, and on continuing the descent, by retention of the upper jaw 14 by the check bolt 25, the opening of these jaws 12 and 14 takes place, the cut- 011 end 55 of the weft thread 48 being freed from the pressure of the jaws 12 and 14 and sucked immediately through the tubular extension 16 of the suction pipe 17 and thus successively, with each passage of the weft thread, there is repeated the cycle of fastening and positioning for cutting the weft thread and of sucking the cut-off end of the latter.
  • Device for a loom for gripping and removing surplus ends of weft threads inserted in sheds during formation of a fabric comprising a loom frame, a cutting knife mounted on the loom frame at one edge of the fabric being woven, upper and lower gripper jaws, means for mounting said jaws adjacent said knife for independent pivotal movement toward and away from each other and for conjoint movement together when closed to grip a weft end, one of said jaws including a semi-cylindrical section of an end of a tubular suction conduit, the other of said jaws including a complementary semi-cylindrical section of said conduit for operative engagement with said first-mentioned section to complete the end of said suction conduit when the jaws are closed, means for urging one of said jaws in one direction towards gripping engagement with the other jaw, means for limiting the extent of movement of said one jaw in said one direction, biassing means for urging the other jaw away from gripping engagement with said one jaw, actuating means for connection with a rotating member of the a
  • said means for mounting the jaws comprises a first support member fixedly attached to the frame of a loom, and second and third support members connected respectively to each other and to the first support member, first means for adjustably varying the relative positions of the first and second support members along a first line in a vertical plane, and second means for adjustably varying the relative positions of the second and third support members along a second line in a vertical plane but at right angles to the first line.
  • said actuating means for moving said other jaw includes rotary cam means attached to a rotating member of a loom, and follower means connected with the other jaw and coacting with the cam means.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US651857A 1966-08-26 1967-07-07 Selvage trimming and waste removal means Expired - Lifetime US3455342A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES33106566 1966-08-26

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US3455342A true US3455342A (en) 1969-07-15

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US (1) US3455342A (de)
CH (1) CH461402A (de)
GB (1) GB1186235A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736965A (en) * 1970-05-26 1973-06-05 Fothergill & Harvey Ltd Means for severing of weft yarn during weaving
US4453572A (en) * 1982-07-26 1984-06-12 Burlington Industries, Inc. Method and apparatus for waste selvage removal
US4498504A (en) * 1982-09-23 1985-02-12 Burlington Industries, Inc. Filling fringe waste reduction
DE3921033A1 (de) * 1988-06-27 1989-12-28 Tagawa Kikai Co Vorrichtung zum erfassen des schussfadenendes bei schuetzenlosen webautomaten
IT201800003084A1 (it) * 2018-02-27 2019-08-27 Itema Spa Dispositivo di taglio dei fili di trama in un telaio tessile a pinze senza formazione di falsa cimossa

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109468733B (zh) * 2018-11-09 2020-10-30 绍兴新越机械制造有限公司 一种环切式剪纬装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258038A (en) * 1962-12-21 1966-06-28 Brelic Internat Inc Weft end cutting devices for shuttleless looms
US3269426A (en) * 1963-05-30 1966-08-30 Llado Jose Llado Weft braking and positioning device for shuttleless looms
US3276483A (en) * 1963-09-19 1966-10-04 Golobart Ramon Balaguer Mechanism for clamping and releasing weft yarn
FR1468156A (fr) * 1966-02-14 1967-02-03 Embouchure de coupe et d'aspiration de fils de trame pour métiers à tisser sans navette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258038A (en) * 1962-12-21 1966-06-28 Brelic Internat Inc Weft end cutting devices for shuttleless looms
US3269426A (en) * 1963-05-30 1966-08-30 Llado Jose Llado Weft braking and positioning device for shuttleless looms
US3276483A (en) * 1963-09-19 1966-10-04 Golobart Ramon Balaguer Mechanism for clamping and releasing weft yarn
FR1468156A (fr) * 1966-02-14 1967-02-03 Embouchure de coupe et d'aspiration de fils de trame pour métiers à tisser sans navette

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736965A (en) * 1970-05-26 1973-06-05 Fothergill & Harvey Ltd Means for severing of weft yarn during weaving
US4453572A (en) * 1982-07-26 1984-06-12 Burlington Industries, Inc. Method and apparatus for waste selvage removal
US4498504A (en) * 1982-09-23 1985-02-12 Burlington Industries, Inc. Filling fringe waste reduction
DE3921033A1 (de) * 1988-06-27 1989-12-28 Tagawa Kikai Co Vorrichtung zum erfassen des schussfadenendes bei schuetzenlosen webautomaten
FR2634230A1 (fr) * 1988-06-27 1990-01-19 Tagawa Kikai Kk Dispositif de traitement d'extremite de trame pour un metier a tisser sans navette
IT201800003084A1 (it) * 2018-02-27 2019-08-27 Itema Spa Dispositivo di taglio dei fili di trama in un telaio tessile a pinze senza formazione di falsa cimossa

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Publication number Publication date
GB1186235A (en) 1970-04-02
CH461402A (de) 1968-08-15

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