US3796236A - Weft thread inserting means - Google Patents

Weft thread inserting means Download PDF

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Publication number
US3796236A
US3796236A US00312890A US3796236DA US3796236A US 3796236 A US3796236 A US 3796236A US 00312890 A US00312890 A US 00312890A US 3796236D A US3796236D A US 3796236DA US 3796236 A US3796236 A US 3796236A
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United States
Prior art keywords
segments
weft
conduit
sleeve
weft thread
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Expired - Lifetime
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US00312890A
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English (en)
Inventor
H Kamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
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W Schlafhorst AG and Co
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Publication date
Application filed by W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
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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 device for inserting weft threads in looms having D 9 1971 G 2160998 stationary supply spools includes a conduit disposed ermany between the warp threads of the shed and through which the weft threads are passed by on air stream 139/126 zi i j gi passing through the conduit.
  • a plurality of segments having weft thread egress Slots are disposed adjacent [58] Flew of Search 139/122 Z;B one another and sleeves are mounted on the segments for movement parallel to the direction of the weft thread to connect the segments to form the closed [56] References Cited Conduit UNITED STATES PATENTS 1/1971 Svaty 139/127 10 Claims, 6 Drawing Figures PATENIEDMAR 12 I974 SHEET 1 OF 3 FIGB Pmmwaam Ian I 3.796236 sum g or s WEFT THREAD INSERTING MEANS The invention relates to a device for inserting weft threads in looms equipped with stationary supply spools.
  • the weft threads are passed by means of an air stream through the openings of a multiplicity of segments which are arranged side by side in rows and which are disposed between the warp threads of the shed and which have a weft-thread egress slot that can be closed.
  • the weft-thread egress slots of the segments can be closed, whereby each segment is provided with a guide opening closed in on itself for the weft thread. Uncontrollable breaking-out of the latter during the carrying-in, particularly over large web widths, is thereby prevented.
  • Such a device suffers from the disadvantage of considerable air losses in the area of the spaces between the individual segments.
  • an arrangement has become known which firmly encloses the warp threads by two lengthwise sections which are bent in a U-shape configuration.
  • the two sections are movable against each other and have side walls with tongues and gaps forming a shed, and which produces in'this manner within a smaller section of the shed a space closed on all sides through which the weft thread is drawn.
  • the wellknown disadvantage remains that in the free-flight of the weft threads, the latter loose part of their twist as they are carried in, so that the finished woven goods have undesirable and uncontrollable effects.
  • a further disadvantage of the last-mentioned device resides in the favt that a considerable mechanical effort is required to realize a design selection of reasonable and practical effect.
  • the cartridge itself is propelled by an air blast through a weft tube attached laterally to the web and subsequently, without additional guide elements, through the warp threads which form the shed.
  • the noise produced in the launching of a cartridge constitutes a considerable nuisance. It is an obother to form a closed through passage.
  • the segments arranged according to the invention can be arranged stationary and the warp threads of the shed can dip into the spaces between the segments.
  • the segments are preferably connected with the sley.
  • the sleeves connecting the segments with each other are coupled for the purpose of opening and closing the weft-thread egress slots as well as the spaces between the segments, with actuator elements for the opening and closing motions which are controlled by the main shaft of the loom synchronously with the formation of the shed.
  • the device according to the invention can, however, be used to particular advantage also in looms in which the weft threads are inserted into the shed by gripper shuttles.
  • the aforesaid is achieved by providing an arrangement whereby the segments, which can be closed to form a tube by means of the sleeves, are connected to a device to supply the interior of the tube with a suction or compressed air stream for transporting a gripper shuttle back and forth.
  • the weft material to be woven Apart from the known advantages for the weft material to be woven, such as the elimination of the untwisting effect and of the poor guidance reliability during insertion, it is possible by connecting a suction or compressed air stream to the segments which are closed to form a tube, to lead a gripper shuttle with its weft thread through the tube and to return the gripper shuttle to the launching side after looping the weft thread at the web.
  • FIG. 1 is an exploded view of a segment of a weft thread inserting device according to one embodiment of the invention.
  • FIG. 2 is a perspective view of the segment shown in FIG. 1 but with the parts assembled and in a condition wherein the weft-thread egress slot is open and the sleeve is pushed in.
  • FIG. 3 is a perspective view of the segment shown in FIG. 1 but in a condition wherein the weft-thread egress slot is closed and the sleeve is pushed out.
  • FIG. 4 is a elevational view of a shed with actuating elements for opening and closing the segments.
  • FIG. 5 is a sectional view of a closed row of segments and showing a gripper shuttle in the starting position.
  • FIG. 6 is a side view, on a smaller scale, of the gripper shuttle magazine shown in FIG. 5.
  • FIG. 1 shows an exploded view of a segment 1 with the various parts arranged relative to a segment ring 2 to indicate particularly clearly which parts are moved during the opening and closing operations.
  • the segment ring 2 is firmly mounted on a segment holder 3 of which only the upper part is shown in FIGS. 1, 2 and 3.
  • a segment attachment 4 is immovably fastened on the segment ring 2 by means of two pins 8 which are driven into respective holes 8, in the segment ring 2.
  • the segment attachment 4 with its roof-shaped incline facilitates the dipping of the segment 1 into the group of warp threads of the shed.
  • a sleeve 5 is located in in front of the segment ring 2.
  • the sleeve 5 is rotatably supported in the segment ring 2 and can be displaced parallel to the direction of the weft.
  • the sleeve 5 has a turning arm 6 and a weftthread egress slot 7 as will be further explained.
  • the sleeve 5 has a shoulder forming a sealing surface 9 as well as two pins 10 and 11.
  • the pin 10 as well as the turning arm 6 move, in the assembled condition, in elongated slots 13 and 12 respectively machined into the segment ring 2 with each elongated slot 13, 12 having the same pitch angle, the arrangement be such that a rotary motion of the sleeve 5 causes an axial displacement of the sleeve 5.
  • the turning arm 6 is led not only through the elongated hole 12, but also through a further elongated slot 14 of a segment part 15 which fits into a recess 16 which is machined at the inside surface of the segment ring 2.
  • segment part 15 in this m,nner is supported displaceably, like the sleeve 5, in the weft direction, so that part of the weft-thread egress slot 7 of the sleeve 5 is sealed off by the segment part 15 which protrudes from the segment ring 2. This condition is shown in FIG. 3.
  • the part of the weft-thread egress slot 7 in the segment ring 2 which cannot be covered up by the sleeve 5 is closed by means of a segment part 17 which is inserted into a further recess 18 in the segment ring 2 and which can be moved back and forth by the pin 1 ll of the sleeve 5.
  • the pin 11 engages an elongated slot 19 in the segment part 17.
  • Pins 20 and 21 on segment part 17 engage short elongated hole guides 22 and 23 respectively, in segment ring 2, the arrangement being such that the segment part 17 moves only straight or circumferentially inside the recess 18 during displacement of pin 11.
  • the position of the segment part 17 with the weft-thread egress slot 7 closed can be seen particularly clearly in FIG. 3.
  • a cover strip 24 has an elongated slot 25 through which two pins with heads 27 are press-fitted into holes 26 in segment ring 2.
  • the two pins having heads 27 provide the longitudinal guidance for the cover strip 24 and serve to seal the elongated hole 12 in the segment ring 2.
  • An elongated slot 28 in the cover strip 24 serves as the passage opening for the turning arm 6.
  • FIG. 2 shows the segment 1 in the condition in which the weft-thread egress slot 7 in the segment ring 2 as well as the weft-thread egress slot 7 in the sleeve 5 are conincident and thereby form a single opening for the passage of the weft-thread.
  • the shoulder of the sleeve 5 which is provided with the sealing surface 9 rests, in the FIG. 2 position, firmly against the segment ring 2. In the condition of the segment shown in FIG. 2, it becomes possible to dispose or immerse it into the warp or to swing it out of the shed.
  • a completely closed tube formed by the segment rings 2 and the sleeves 5 is produced through which a free-flight weft-thread can be blown, or a weft-thread carried by a gripper shuttle can be transported by means of a suction or compressed air stream.
  • FIG. 4 shows a shed formed by warp threads 29 which at their deviding point become a woven web 30.
  • a weft-thread 31 which has been pushed against the web.
  • the segments 1 are mounted on segment holders 3 and can be pivoted about the center of a shaft 32, (FIG. 4) in the direction of the double arrow 33 by means of a reed 34, synchronously with the motions for the formation of the shed aswell as the weft thread loop.
  • Each segment arm 8 has an extension 3' on which is pivoted an angle lever 35 which, in turn, is movably connected to the turning arm 6 of a segment 1 by means of an elongated slot 36 in angle lever 35.
  • the angle lever 35 has a portion 38 which rests, through the biasing force of a tension spring 37, on the circumference of a cam 39.
  • the cams 39 of a row of segments are fastened to a shaft 40 which is rotatably supported in the segment holders 3.
  • the shaft 40 is driven in the same manner as the motions for the formation of the shed as well as the weft-thread looping from the main shaft of the loom.
  • the opening and closing motions for the individual segments are derived from the cam 39.
  • the opening and closing motions for all of the segment rings and sleeves arranged in one row of segments need not occur simultaneously, but the possibility exists to open the weft-thread egress slots 7, 7 as well as the spaces between segments 1 bridged by the sleeves 5, in a controlled pattern and to thereby change the air flow in the tube formed by the segments. Air flow changed in this manner can be used, as already mentioned, for decelerating and accelerating the gripper shuttle within a row of segments. Of course, all laminations and the spaces between them can also be opened or closed simultaneously.
  • FIG. 5 shows the segment rings 2 with their sleeves 5 fitted together to form a closed tube when the turning arms- 6 are actuated in the appropriate position as previously described.
  • the tube formed by the segments 2 and the sleeves 5 is connected, in the example of the embodiment shown in FIG. 5, with a resiliently adjoining launching tube section 43 in which a gripper shuttle 41 is held in readiness.
  • a weft thread 31 has been fed to the gripper shuttle 41 in a manner known per se.
  • the launching tube section is part of an also known gripper shuttle magazine 44 (FIG.
  • the gripper shuttle magazine 44 has a connecting hold 45 for compressed or suction air as well as alternatingly supplied channels 42 for the back and forth transport of the gripper shuttles.
  • FIG. 6 shows a circular gripper shuttle magazine 44 in which a launching tube section 43 has assumed a position relative to the shed, which is suitable for carrying-in the weft thread.
  • the gripper shuttle magazine 44 is advantageously driven in the direction toward the dividing point of the shed.
  • the gripper shuttle 41 can be returned within the tube formed by the segments and the sleeves as well as in a separate tube outside the shed.
  • a smooth tube may be suitably aligned, for example, in
  • Device for inserting weft threads in looms having stationary supply spools wherein the weft threads are carried by an air stream passing through a conduit disposed between the warp threads of the shed, comprising a plurality of segments disposed adjacent to one another and having aligned openings, said segments having means defining a weft thread egress slot, each of said segments having sleeves movably parallel to the direction of the weft thread and which are operable to connect said segments to form a closed through conduit.
  • Device comprising a gripper shuttle disposed in said conduit, and means supplying said conduit with a stream of suction air or compressed air for transporting said gripper shuttle back and forth within said conduit.
  • Device comprising means operably associated with said actuating means for controlling the opening and closing motion of said means defining a weft thread egress slot as a function of the distance travelled by said gripper shuttle in said conduit formed by said segments and sleeves.
  • each of said segments comprises a ring element having a radial opening, and means mounted on said ring element movable circumferentially for closing said radial opening.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00312890A 1971-12-09 1972-12-07 Weft thread inserting means Expired - Lifetime US3796236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2160998A DE2160998A1 (de) 1971-12-09 1971-12-09 Vorrichtung zum eintragen von schussfaeden an mit ortsfesten vorratsspulen versehenen webmaschinen

Publications (1)

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US3796236A true US3796236A (en) 1974-03-12

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US00312890A Expired - Lifetime US3796236A (en) 1971-12-09 1972-12-07 Weft thread inserting means

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US (1) US3796236A (de)
JP (1) JPS4864259A (de)
BE (1) BE792510A (de)
CH (1) CH545362A (de)
DE (1) DE2160998A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868976A (en) * 1972-07-24 1975-03-04 Crompton & Knowles Corp Pneumatic weft inserting mechanism
US4100944A (en) * 1975-09-19 1978-07-18 Omita S.P.A. Method and apparatus for transferring the weft
FR2492419A1 (fr) * 1980-10-16 1982-04-23 Mcginley Thomas F Organe de retenue de foule, metier a tisser muni d'un tel organe et procede de tissage
US4438790A (en) * 1980-03-27 1984-03-27 Ruti Machinery Works Ltd. Apparatus for guiding a fluid medium driven weft thread in the shed of a loom and use of the apparatus at a multiple longitudinal traversing shed loom
US4484603A (en) * 1982-02-19 1984-11-27 Sulzer-Ruti Machinery Works Ltd. Serial shed weaving machine with a weaving rotor
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53126355A (en) * 1977-04-06 1978-11-04 Nissan Motor Pneumatic guiding device for air jet loom
DE2901311C2 (de) * 1979-01-15 1984-07-19 Walter 8832 Weissenburg Scheffel Webmaschine mit Schußeintrag durch ein strömendes Medium
JPS5643442A (en) * 1979-09-08 1981-04-22 Hanwa Co Ltd Channel of air jet stream in air jet loom
US4357963A (en) * 1980-05-16 1982-11-09 Walter Scheffel Loom with weft picking by a flowing medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412763A (en) * 1966-06-07 1968-11-26 Crompton & Knowles Corp Pneumatic loom
US3416572A (en) * 1965-12-30 1968-12-17 Giavini Guido Straight shuttleless looms
US3557845A (en) * 1968-07-04 1971-01-26 Elitex Zavody Textilniho Guiding device for picked weft threads

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3416572A (en) * 1965-12-30 1968-12-17 Giavini Guido Straight shuttleless looms
US3412763A (en) * 1966-06-07 1968-11-26 Crompton & Knowles Corp Pneumatic loom
US3557845A (en) * 1968-07-04 1971-01-26 Elitex Zavody Textilniho Guiding device for picked weft threads

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868976A (en) * 1972-07-24 1975-03-04 Crompton & Knowles Corp Pneumatic weft inserting mechanism
US4100944A (en) * 1975-09-19 1978-07-18 Omita S.P.A. Method and apparatus for transferring the weft
US4438790A (en) * 1980-03-27 1984-03-27 Ruti Machinery Works Ltd. Apparatus for guiding a fluid medium driven weft thread in the shed of a loom and use of the apparatus at a multiple longitudinal traversing shed loom
US4492254A (en) * 1980-03-27 1985-01-08 Sulzer-Ruti Machinery Works Limited Apparatus for guiding a fluid medium driven weft thread in the shed of a weaving machine and use of the apparatus at a multiple longitudinal traversing shed weaving machine
US4492255A (en) * 1980-03-27 1985-01-08 Sulzer-Ruti Machinery Works Limited Apparatus for guiding a fluid medium driven weft thread in the shed of a weaving machine and use of the apparatus at a multiple longitudinal traversing shed weaving machine
FR2492419A1 (fr) * 1980-10-16 1982-04-23 Mcginley Thomas F Organe de retenue de foule, metier a tisser muni d'un tel organe et procede de tissage
DE3141209A1 (de) * 1980-10-16 1982-06-09 Mcginley Thomas F Webverfahren und webstuhl zur durchfuehrung des verfahrens
US4484603A (en) * 1982-02-19 1984-11-27 Sulzer-Ruti Machinery Works Ltd. Serial shed weaving machine with a weaving rotor
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom

Also Published As

Publication number Publication date
DE2160998A1 (de) 1973-06-20
CH545362A (de) 1973-12-15
JPS4864259A (de) 1973-09-06
BE792510A (fr) 1973-03-30

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