US3443602A - Device and method for producing a selvedge - Google Patents

Device and method for producing a selvedge Download PDF

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Publication number
US3443602A
US3443602A US629718A US3443602DA US3443602A US 3443602 A US3443602 A US 3443602A US 629718 A US629718 A US 629718A US 3443602D A US3443602D A US 3443602DA US 3443602 A US3443602 A US 3443602A
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United States
Prior art keywords
threads
shed
warp threads
weft
selvedge
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Expired - Lifetime
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US629718A
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English (en)
Inventor
Heinrich Schaffer
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Ruti Machinery Works Ltd
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Ruti Machinery Works Ltd
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Filing date
Publication date
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Publication of US3443602A publication Critical patent/US3443602A/en
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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
    • D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing
    • 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

  • a device for producing a selvedge on a weaving machine which comprises a movable gripper means provided with a suction tube having a suction orifice at its forward end by which the end portions of weft threads projecting from the shed are successively seized by a sucking action, the tube being moved between the outer warp threads and through the interior of the opened shed towards the projecting end portions and back again to thereby draw the seized end portions, successively, into the shed substantially without fouling or tearing the adjacent warp threads.
  • a method for producing selvedge is also disclosed.
  • This invention relates to a device and method for producing a selvedge on a weaving machine, and in particular to a device having means for seizing end portions of weft threads projecting out of the shed and for drawing the seized end portions into the shed substantially without fouling or tearing of the adjacent warp threads.
  • this invention contemplates a device for producing a selvedge on a weaving machine, which comprises a movable gripper means provided with a suction tube having a suction orifice at its forward end by which the end portions of weft threads projecting out of the shed are successively seized as the result of a sucking action, the tube being moved towards the projecting end portions and back again between outer warp threads and through the interior of the opened shed to thereby successively draw the seized end portions into the shed substantially without fouling or tearing the adjacent warp threads.
  • FIGURES 1 to 4 show one embodiment of the device of the invention positioned on a weaving machine at different operating stages for forming the selvedge;
  • FIGURE 5 shows a plan view of a sample of a selvedge produced by the present invention.
  • FIGURE 1 shows a part of the sley 31 of a weaving machine.
  • the sley carried a reed 15, used for beating up the drawn-in weft threads.
  • Above the sley 1 are positioned the warp threads 9 forming the upper part of a shed and the warp threads 10 and 11 forming the lower part of the shed.
  • Threads 11 comprise presser warp threads which are separately controlled and in this embodiment are shown as forming the outermost threads of the lower warp sheet.
  • the resulting fabric is designated by the reference numeral 18.
  • Connected to the weaving machine is a device or an arrangement which includes a shaft or rod 32 displaceable in its longitudinal direction. Along a substantially horizontal axis.
  • the longitudinal displacement of this shaft is achieved by means of a lever system comprised of elements 37, 33, 36, and 34.
  • This system is actuated by the rod 35.
  • the rod 35 is moved upwards and downwards by means of an eccentric (not shown).
  • a pivoting movement of the lever 34 causes a pivoting movement of the lever 33 connected to the shaft 36.
  • the rod 37 extending into a slot in the connecting element 17, causes the shaft 32 to be displaced in the axial direction.
  • Connecting element 17 and the shaft 32 are firmly connected to each other.
  • the shaft 32 is also pivotable or rotatable about its longitudinal axis. Rotation of shaft 32 is achieved by a displacement of the pushrod 12 in the axial direction. This displacement is transmitted to element 17 by the bar 16 which engages in a.
  • a holding or thread take-up tube 13 serves to seize and hold the end of the weft threads 24 inserted from left to right.
  • the weft threads are inserted by means of a gripper shuttle (not shown).
  • the holding tube 13 is provided with a narrow longitudinal slot by which the weft thread is taken up from the gripper shuttle and held.
  • the holding device 13 is likewise connected, via the hose 22 with a suction apparatus (not shown). The holding tube 13 can be moved into the shed and out again by axial displacement of the rod 38.
  • a shuttle is located in its non-operative position on the left-hand side of the weaving machine. Immediately before the shuttle had reached this position, it had drawn in the weft thread 14 from right to left. At its right-hand end this thread is connected to the schematically illustrated stock bobbin 20, from which it has been drawn off, having previously been measured out to a prescribed length. The weft thread 14 has already been beaten up by the reed 15 and is woven in by alternation of the shed.
  • the suction tube 26 with the suction nozzle 27 moves between the outer warp threads of the lower shed into and through the interior of the open shed and then in the outward direction into the position indicated in FIGURE 1.
  • the suction tube has a roughly circular, curved, form.
  • FIGURE 2 The next stage of operation can be seen in FIGURE 2.
  • the shaft 32 is moved, under the action of the movement of the lever system comprised of elements 33, 36, 34 and 35, in the axial direction and, in fact, forwardly with respect to the weaving machine, ie to the left in FIGURE 2.
  • the outermost warp threads 11 of the lower shed are moved upwards again by a separate shed-forming device (not shown).
  • the remaining threads 9 and 10 forming the shed are still in their open shed position at this stage of operations.
  • the shuttle is shot from the left side to the right through the shed.
  • the holding tube 13, used for seizing and stretching out the new weft thread to be inserted is pushed into the shed by moving the rod 38 in the axial direction towards the middle of the weaving machine.
  • the suction tube 26 has, in its forward movement, reached the fabric stop. At this moment the already inserted and woven weft thread 14 is cut by the shears 21 (not shown in the other figures). The end of the weft thread projecting from the fabric is seized and sucked up by the suction orifice 27 of the suction tube 26. The suction tube 26 is thereupon drawn back into the shed and emerges from the warp threads. The warp threads 11, already moved back into the upper shed, cause the small end portion of the inserted thread to be momentarily held in the shed upon release from the suction orifice 27. These warp threads find themselves under a certain tension and slide past the end of the suction tube 26 in the plane of the warp threads 9.
  • the suction tube 26 is shown in its retracted position in FIGURE 4. Also shown is the weft thread 24 freshly introduced from left to right, this thread being held by the holding tube 13. Simultaneously with the closing of the shed, the holding tube 13 is drawn to the right and so pulls the inserted weft thread 24 to the right.
  • the length of the weft threads 24 inserted from the left are, advantageously, so measured out that they do not quite extend to the selvedge.
  • the length of threads 24 is so measured out that they only extend so far towards the selvedge that their ends coincide approximately with the ends of the inserted thread ends of the threads 14 inserted from right to left.
  • This positioning is shown in FIGURE 5.
  • the weft threads inserted from right to left are designated by the reference numeral 14, and the weft threads inserted from left to right by the numeral 24.
  • the weft threads 24 inserted from the left overlap the end portions of the weft threads 14 inserted from the right, the amount of overlap extending over three warp threads.
  • the ends of the threads 24 are pressed downwards out of the fabric and in this position they can readily be cut away. Thus their length can be very precisely defined in the resulting fabric.
  • a device for producing a selvedge on a weaving machine wherein weft threads are inserted along a sley into warp sheds and are heat up into a fabric with end portions of the weft threads projecting out from the outer warp threads of the sheds said device comprising a moveable gripper means having a suction tube with a suction orifice at its forward end for separately and successively seizing an end portion of each of the weft threads projecting from the sheds by a sucking action, said suction tube having a pivoting motion about a substantially horizontal axis and a reciprocating motion along said axis and successively moving between the outer warp threads and through an open shed formed during the weaving operation towards each successive projecting end portion to seize same by said sucking action and then moving back again through the outer warp threads, the end portion of weft thread seized by the said suction tube being held in the open shed by presser warp threads and the outer warp threads of the shed when released from said suction or
  • said gripper means includes a drive means for imparting motion to the suction tube.
  • a method for producing a selvedge on a weaving machine wherein weft threads are inserted along a sley into warp sheds and are heat up into fabric, with end portions of the weft threads projecting out from the outer warp threads of the sheds which comprises separately and successively seizing the end portion of each of the weft threads projecting from the sheds with a suction tube having sucking action, effecting a separate auxiliary shed-changing movement with a plurality of presser warp threads whereby said suction tube is positioned between the presser threads and outer warp threads of an open shed and thereafter moving the seized portion of said weft thread back through the outer warp threads whereby the end portion of weft thread seized by the sucking action is drawn-in and held in the open shed between the presser threads and the outer warp threads when released by said sucking action.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Woven Fabrics (AREA)
US629718A 1966-04-15 1967-04-10 Device and method for producing a selvedge Expired - Lifetime US3443602A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH552266A CH436156A (de) 1966-04-15 1966-04-15 Einrichtung zum Herstellen einer Gewebekante

Publications (1)

Publication Number Publication Date
US3443602A true US3443602A (en) 1969-05-13

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Application Number Title Priority Date Filing Date
US629718A Expired - Lifetime US3443602A (en) 1966-04-15 1967-04-10 Device and method for producing a selvedge

Country Status (7)

Country Link
US (1) US3443602A (de)
BE (1) BE695980A (de)
CH (1) CH436156A (de)
DE (1) DE1710306A1 (de)
ES (1) ES339234A1 (de)
FR (1) FR1514852A (de)
GB (1) GB1113779A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563280A (en) * 1969-06-02 1971-02-16 North American Rockwell Method and apparatus for tucked-in selvage
US3678967A (en) * 1969-12-04 1972-07-25 Fischer Ag Brugg Georg Shedding motion for a weaving machine
US3685551A (en) * 1969-07-22 1972-08-22 Alexei Nikolaevich Parshin Selvage forming device for looms
US4348089A (en) * 1977-12-30 1982-09-07 Polaroid Corporation Lens movement actuated reference and sequencing means for cameras having unidirectional automatic focusing
EP0360742A1 (de) * 1988-09-23 1990-03-28 GebràœDer Sulzer Aktiengesellschaft Leistenlegevorrichtung für eine Webmaschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600122838A1 (it) * 2016-12-02 2018-06-02 Itema Spa Leverismo di comando per cimossatrice a testa di lavoro mobile per macchine tessili

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034487A (en) * 1932-05-23 1936-03-17 Firm Tefag Textil Finanz A G Weaving in looms having nipper shuttles for drawing weft threads from stationary supplies
US3186444A (en) * 1961-02-20 1965-06-01 C A Delius & Sohne Process and an apparatus for controlling the weft threads in weaving looms
US3340902A (en) * 1966-03-17 1967-09-12 Marshall John D Method and apparatus for forming tucked-in selvage
US3361164A (en) * 1964-06-19 1968-01-02 Sulzer Ag Method and apparatus for weaving fabrics with severed weft yarns and fabric made by the method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034487A (en) * 1932-05-23 1936-03-17 Firm Tefag Textil Finanz A G Weaving in looms having nipper shuttles for drawing weft threads from stationary supplies
US3186444A (en) * 1961-02-20 1965-06-01 C A Delius & Sohne Process and an apparatus for controlling the weft threads in weaving looms
US3361164A (en) * 1964-06-19 1968-01-02 Sulzer Ag Method and apparatus for weaving fabrics with severed weft yarns and fabric made by the method and apparatus
US3340902A (en) * 1966-03-17 1967-09-12 Marshall John D Method and apparatus for forming tucked-in selvage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563280A (en) * 1969-06-02 1971-02-16 North American Rockwell Method and apparatus for tucked-in selvage
US3685551A (en) * 1969-07-22 1972-08-22 Alexei Nikolaevich Parshin Selvage forming device for looms
US3678967A (en) * 1969-12-04 1972-07-25 Fischer Ag Brugg Georg Shedding motion for a weaving machine
US4348089A (en) * 1977-12-30 1982-09-07 Polaroid Corporation Lens movement actuated reference and sequencing means for cameras having unidirectional automatic focusing
EP0360742A1 (de) * 1988-09-23 1990-03-28 GebràœDer Sulzer Aktiengesellschaft Leistenlegevorrichtung für eine Webmaschine

Also Published As

Publication number Publication date
FR1514852A (fr) 1968-02-23
ES339234A1 (es) 1968-04-16
CH436156A (de) 1967-05-15
GB1113779A (en) 1968-05-15
BE695980A (de) 1967-09-01
DE1710306A1 (de) 1971-09-16

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