US3727647A - Weft thread selecting and handling means for gripper shuttle loom - Google Patents

Weft thread selecting and handling means for gripper shuttle loom Download PDF

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Publication number
US3727647A
US3727647A US00159140A US3727647DA US3727647A US 3727647 A US3727647 A US 3727647A US 00159140 A US00159140 A US 00159140A US 3727647D A US3727647D A US 3727647DA US 3727647 A US3727647 A US 3727647A
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United States
Prior art keywords
shuttle
thread
weft
slide element
weft thread
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US00159140A
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English (en)
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C Laval
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Lebocey Industrie SA
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Lebocey Industrie SA
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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 feed means selects the next weft thread to be inserted and presents it to the cut and hold as sembly which cuts it and grips the spool-attached end in position to be snagged by the shuttle pincer hook on the shuttles next pass.
  • This invention is an improvement 'over the conventional loom which has mechanisms for shedding, picking and beating up.
  • the improvement includes a selectively actuated weft thread feed means mounted on the loom at each side edge of the fabric.
  • the feed means has ,multiple passageways for keeping separate the weft threads which have been previously inserted into the fabric from a plurality of thread spools.
  • the feed means also has a selection and presentation mechanism for sequentially, in accordance with a preset program, selecting the next weft thread to be inserted, and presenting it to a cut and hold assembly which cuts it and holds the spool-attached end in posi-- tion to be snagged by a shuttle pincer hook on the shuttles next pass.
  • FIG. 1 is a perspective view of the right side of the loom, looking down and toward the fabric center from above, showing the preferred embodiment of the weft feed means at the moment of beating up; the shuttle and the cut and hold assembly being removed for purposes ofclarity;
  • FIG. 2 is a top plan view showing the shuttle in the right shuttle box, the previous left to right weft thread having already been released from the left pincer hook, and the feed means having selected the next weft thread to be inserted and being in the process of presenting it to the cut and hold assembly;
  • FIG. 3 is a side elevation detail view of the notched slide element of the feed means and the two stiff converging guide wires; 7 I
  • FIG. 4 is a perspective view of the right side of the loom, looking down and toward the fabric edge from above, showing the alternate embodiment of the weft feed means;
  • FIG. 5 is a side elevation detail view of the presentation finger and its actuation means.
  • FIGS. 1 and 2 a non-automatic shuttle loom is shown which is of the same type shown in US. Pat. No. 3,543,809. Reference should be made 0 to this patent because the present invention is an im provement thereover and many of the loom components are the same or similar.
  • the shuttle operation is generally as follows:
  • the shuttle starting from the left shuttle box, carries the leading end of a selected weft thread in its left or trailing pincer hook through the shed, stopping so that the left pincer hook is substantially even with the right edge of the fabric.
  • the batten, holding the shuttle beats up the inserted weft thread and, simultaneously, means cooperating with the temple opens the left shuttle pincer hook to release the inserted weft thread leading end.
  • the weft thread feed means in accordance with a pre-set program, selects a previously inserted weft thread (which is still attached to its spool) and presents it to the cut and hold assembly located on the batten.
  • the cut and hold assembly cuts the presented weft thread and grips the end which remains attached to the spool. The gripped end becomes the leading end of the next right to left weft thread to bein serted.
  • the loom is provided with a right temple I mounted on horizontal rods 2 which are slidably carried by block 3 secured to a bar or breast beam 4 which spans the width of the loom.
  • a left temple is carried on the other end of the beam 4 and, since it is identical to the right temple, it need not be described.
  • a cover 5 is fixed to temple 1 to maintain the fabric in the desired position.
  • Weft threads 6, 7, 8 and 9 are supplied by external thread spools located adjacent to the side of the fabric and unshown adjustable braking devices engage the weft threads between the spools and the apertured guide 34 shown in FIG. 2. Similar spools and braking devices are located adjacent to the other side of the fabric. The number of spools may vary according to the woven pattern desired.
  • a weft thread feed means is mounted on the outboard side of temple 1.
  • the feed means includes a channel 11 fixed to temple 1 and having a vertical slideway.
  • Channel 11 has a cut-out portion located at its approximate mid-point and two small apertures located above and below the cut-out portion for anchoring two stiff converging guide wires 38 as can best be seen in FIGS. 1 and 3.
  • a notched slide 10 is positioned in the vertical slideway of channel 11 and is adapted for vertical movement therein. Slide has notches cut into its vertical edge (furthest from breast beam 4). The number of notches equals the number of weft threads fed from that side of the fabric.
  • a horizontal stud 35 which is straddled by the forked end of pivot lever 12 (see FIG. 3).
  • Lever 12 pivots on spindle 13 which is fixed on temple 1 to raise the lower slide 10.
  • Constantly urging slide 10 downwardly is a piston 15 which is upwardly biased by spring 14 against roller 16 on pivoted lever 12.
  • three levers 17, 18 and 19 are pivoted at their inboard ends to a temple-mounted horizontal pivot pin 20. Cables 21, 22 and 23 are pinned to the outboard ends of levers 17, 18 and 19, respectfully, and are engaged at their lower ends by a programming device (e.g., of the dobby type).
  • a programming device e.g., of the dobby type
  • FIGS. 1-3 Three adjustable set screws 24, 25 and 26 are secured in temple 1 and act as bottom stops for levers 17, 18 and 19.
  • the set-up shown in FIGS. 1-3 provides for four vertical positions of slide 10 within channel 11.
  • spring 14 and piston 15 urge pivoted lever 12 upwardly' and slide 10 is depressed to its lowest vertical position.
  • lever 17 pivots downwardly until it strikes the head of set screw 24, as shown in FIG. 1.
  • Lever 17 depresses the free end of pivoted lever 12 to raise slide 10 to its second lowest vertical position.
  • Pulling cables 22 and 23 causes slide 10 .to be raised to its third and fourth lowest vertical positions, respectfully. At each slide position, one of the slide notches is located in alignment with the cut-out portion of channel 11.
  • the loom may be provided with a slide 10 having additional notches and with correspondingly more levers, cables and set screws.
  • the feed means employs a presentation finger 27 which has a forked tip 28. Finger 27 slides in a horizontal slideway formed in temple 1 and is pinned at its end 29 nearest breast beam 4 to a pivoting arm 30 which pivots about shaft 31 fixed to temple 1. Arm 30 has an elongated aperture 32 cut in its lower portion which is wide enough to slidably receive a horizontal stud. A vertical drive member 33 mounts the horizontal stud which protrudes through aperture 32 and is retained therein by stu'd cap 36.
  • drive member 33 can be cammed vertically by cam 39 on picker shaft 10 so as to move into and out of contact with batten (or reed) 37 which moves in direction a as seen in FIG. 1.
  • the picker shaft cams drive member 33 upwardly to position it in the path of batten 37 during beating up.
  • Batten 37 strikes drive member 33 thereby pivoting arm 30 about shaft 31.
  • Arm 30 drives presentation finger 27 out of temple 1, past the slide notch and through the cut-out portion of channel 11, thus picking up the selected weft thread and carrying it to the position shown in FIG. 1.
  • drive member 33 is not cammed upwardly and therefore the batten 37 passes over the top of drive member 33.
  • the finger 27 remains within temple 1 as shown in FIG. 3.
  • the function of the feed means is to select the next desired weft thread and to present it to the cut and hold assembly which is shown in FIG. 2 only.
  • the assembly is conventional and s the same as that described in detail in US. Pat. No. 3,543,809. Specifically, the assembly has a block 112 mounting a shaft 115. Pivotally carried by shaft is a movable cutting blade 114 which is positioned to scissors with a fixed cutting blade 113 to cut the weft thread. A link 119 is driven by an unshown underlying cam shaft to cause blade 114 to scissors with respect to fixed blade 113. As this cutting action occurs, stud 118 on movable blade 114 bears against and depresses spring-biased rocker arm 116 which is also carried by shaft 115. This causes the spool-attached weft thread end to be caught between stud 118 and rocker arm 1 16 where it is held.
  • the shuttle 101 is also conventional and is the same as that described in detail in US. Pat. No. 3,543,809.
  • Shuttle 101 comes to rest at either side of the fabric in a shuttle box fixed to batten 37 which swings to beat up the weft threads.
  • Shuttle 101 has symmetrical ends, with only the left end being shown in FIG. 2.
  • Screwed to the shuttle left end is left pincer hook 102 which has a rigid plate and a spring plate designed to snag a weft thread therebetween. As shown in FIG. 2, the leading end of the just-inserted weft thread has been released from the left pincer hook 102 and hangs freely.
  • the programming device causes the appropriate cable (here cable 21) to be pulled downwardly thereby lowering lever 17 against set screw 24.
  • Lever'12 pivots the slide 10 moves vertically to position the slide notch holding the selected weft thread 7 in alignment with the cut-out portion in channel 11.
  • the next cycle occurs with the shuttle in the left shuttle box.
  • the right drive member 33 is not cammed upwardly and the presentation finger 27 remains in temple 1.
  • the programming device acts to position the slide notch at the vertical point where the finger 27 can select and present the next desired weft thread to the cut and hold assembly.
  • FIGS. l3 are not the only possible means for accomplishing the desired results of this invention.
  • other means can be substituted for the cables and levers to raise and lower slide 10.
  • other means can be substituted for the drive member and pivoted arm to reciprocate the finger 27.
  • FIG. 4 one alternate embodiment is shown in FIG. 4.
  • the presentation finger 27 and its drive means is the same, but the cables and levers have been exchanged for a pivoting slide 39 mounted on temple stud 40.
  • a programming device pivots notched slide 39 to the desired position at which point finger 27 picks the weft thread therefrom for presentation to the cut and hold assembly.
  • the cut and hold assembly could be provided with means for advancing it toward the slide on alternate cycles to grasp the selected weft thread.
  • weft thread feed means comprising:
  • a slide element having multiple spaced-apart open notches formed on an edge thereof for separately retaining the weft threads which extend from an edge ofthe loomed fabric to said packages b. a presentation finger having a thread receiving notch formed therein;
  • actuating means includes links oriented in position to be driven in cooperation with the loom batten.
  • Apparatus of claim 4 including cam means for raising and lowering said links into and out of position to be contacted by the batten thereby to actuate said presentation finger only on alternate shuttle cycles.
  • Apparatus of claim 1 further having a vertical channel in which said notched slide element is mounted for vertical movement, said channel having a cut-out portion formed therein through. which said presentation finger moves to engage and remove the next seguential weft thread from its slide element notch.
  • Apparatus of claim 5 further having restraints fastened to said vertical channel above and below said cut-out portion to confine the weft thread to its respective slide element notch.
  • a shuttle having a pincer hook mounted adjacent each end of said shuttle, said pincer hook incorporating picking means for snagging a weft thread as said shuttle passes into the shed;
  • pincer hook opening means mounted on the loom at each side edge of the fabric for engaging said pincer hook after it has passed through the shed to free the snagged weft thread therefrom;
  • weft thread feed means mounted on the loom at each side edge of the fabric, said feed means including; a slide element having multiple spaced-apart open notches formed on an edge thereof for separately retaining the weft threads which have been previously inserted into the fabric; a presentation finger having a thread-receiving notch formed therein, means for sequentially aligning the notches of said slide element which retain the next weft thread to be in serted with the thread receiving notch of said presentation finger in accordance with a predetermined program; and means for repetitively actuating said presentation finger to cause it to engage and to remove the selected weft threads from said aligned slide element notches in accordance with a predetermined program; and
  • a cut and hold assembly mounted on the loom at each side edge of the fabric, said assembly having cutting means for cutting the presented weft thread and having holding means for gripping the cut thread end which remains attached to its said thread spool and for positioning the attached cut thread end whereby it is snagged by said shuttle pincer hook as said shuttle passes into the shed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
US00159140A 1971-02-12 1971-07-02 Weft thread selecting and handling means for gripper shuttle loom Expired - Lifetime US3727647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7105849A FR2125222B1 (pt) 1971-02-12 1971-02-12

Publications (1)

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US3727647A true US3727647A (en) 1973-04-17

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US00159140A Expired - Lifetime US3727647A (en) 1971-02-12 1971-07-02 Weft thread selecting and handling means for gripper shuttle loom

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US (1) US3727647A (pt)
BE (1) BE778919A (pt)
CH (1) CH558843A (pt)
DE (1) DE2206239C3 (pt)
FR (1) FR2125222B1 (pt)
GB (1) GB1341930A (pt)
IT (1) IT947418B (pt)
NL (1) NL7201661A (pt)
SU (1) SU466670A3 (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921678A (en) * 1971-11-24 1975-11-25 Lebocey Ind Soc Device for selecting a weft thread in a shuttleless loom supplied by external spools
US3951177A (en) * 1973-11-06 1976-04-20 Nuovo Pignone S.P.A. Devices for folding into the warp shed both ends of a weft thread in a fabric made by a shuttleless loom having a continuous weft supply mechanism
US6148870A (en) * 1998-08-31 2000-11-21 Texo Ab Tubular fabric weaving machine with turnover fold control
US6152187A (en) * 1998-08-31 2000-11-28 Texo Ab Heald frame weaving machine for forming strengthened tubular-woven products
US20140238527A1 (en) * 2011-10-06 2014-08-28 Michelin Recherche Et Technique, S.A. Device and method for extracting wefts in a reinforcing ply intended for the manufacture of a tire

Citations (3)

* 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
US3543809A (en) * 1968-02-26 1970-12-01 Claude Laval Loom for weaving fabric
US3587665A (en) * 1968-07-31 1971-06-28 Monge Antonio C Weft thread selecting device for weaving machines with a fixed weft supply

Patent Citations (3)

* 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
US3543809A (en) * 1968-02-26 1970-12-01 Claude Laval Loom for weaving fabric
US3587665A (en) * 1968-07-31 1971-06-28 Monge Antonio C Weft thread selecting device for weaving machines with a fixed weft supply

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921678A (en) * 1971-11-24 1975-11-25 Lebocey Ind Soc Device for selecting a weft thread in a shuttleless loom supplied by external spools
US3951177A (en) * 1973-11-06 1976-04-20 Nuovo Pignone S.P.A. Devices for folding into the warp shed both ends of a weft thread in a fabric made by a shuttleless loom having a continuous weft supply mechanism
US6148870A (en) * 1998-08-31 2000-11-21 Texo Ab Tubular fabric weaving machine with turnover fold control
US6152187A (en) * 1998-08-31 2000-11-28 Texo Ab Heald frame weaving machine for forming strengthened tubular-woven products
US20140238527A1 (en) * 2011-10-06 2014-08-28 Michelin Recherche Et Technique, S.A. Device and method for extracting wefts in a reinforcing ply intended for the manufacture of a tire
US9115447B2 (en) * 2011-10-06 2015-08-25 Compagnie Generale Des Etablissements Michelin Device and method for extracting wefts in a reinforcing ply intended for the manufacture of a tire

Also Published As

Publication number Publication date
CH558843A (fr) 1975-02-14
SU466670A3 (ru) 1975-04-05
BE778919A (fr) 1972-05-30
FR2125222A1 (pt) 1972-09-29
DE2206239A1 (de) 1972-10-26
NL7201661A (pt) 1972-08-15
IT947418B (it) 1973-05-21
DE2206239C3 (de) 1975-12-18
FR2125222B1 (pt) 1975-01-17
DE2206239B2 (de) 1975-05-07
GB1341930A (en) 1973-12-25

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