US3847187A - Weft inserting channel for pneumatic weaving machines - Google Patents

Weft inserting channel for pneumatic weaving machines Download PDF

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Publication number
US3847187A
US3847187A US00275328A US27532872A US3847187A US 3847187 A US3847187 A US 3847187A US 00275328 A US00275328 A US 00275328A US 27532872 A US27532872 A US 27532872A US 3847187 A US3847187 A US 3847187A
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US
United States
Prior art keywords
weft inserting
sections
active
section
weft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00275328A
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English (en)
Inventor
V Buran
V Horn
B Suchanek
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VYZKUMMY VYVOJOVY USTAV Z VSEO
VYZKUMMY VYVOJOVY USTAV ZAVODU VSEOBECNEHO STROJIRENSTVI CS
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VYZKUMMY VYVOJOVY USTAV Z VSEO
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Publication of US3847187A publication Critical patent/US3847187A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms

Definitions

  • ABSTRACT Weft inserting channel for pneumatic weaving machines, the channel being disposed in the shed and consisting of active and passive sections provided with a weft inserting opening and a directing profile for centripetally directing both the main and the additional pressure air jets in the direction of weft insertion.
  • the radial distance of the directing profile from the axis of the weft inserting channel of at least one passive section adjacent an active section in the direction of weft insertion is equal to or longer than the radial distance of the separate points of connecting line of the tangential point of the directing profile of the following active section with the point of intersection on the front wall of the preceding active section while the radial distance of such point of intersection from the axis is longer than the radial distance of the discharge openings.
  • the present invention relates to a weft inserting channel for pneumatic weaving machines; said channel being disposed in the shed and constituted of both passive and active sections.
  • a weft inserting channel disposed in the shed is used, such channel being constituted of sections of which each is provided with a continuous conical opening for centripetally directing the pressure air jet from the weft inserting nozzle.
  • a channel made in such manner presents a considerable resistance to the flowing air, thus causing an undesired reduction of speed of the air jet and consequently a slower weft insertion to remote points of the weaving shed.
  • weft inserting channels are used, between the sections of which there are mounted several hollow sections with ejecting openings for additive pressure air, which are arranged on the front wall of the section in the direction of the main pressure air jet.
  • a further disadvantage of the known weft inserting channel consists in its relatively considerable dimensions, particularly the considerable diameter of the weft inserting opening, which requires a large shed.
  • the radial distance of the directing profile from the axis of the weft inserting channel of at least one passive section adjacent an active section in the direction of weft insertion is equal to or longer than the radial distance of the separate points of the line connecting the tangential point of the directing profile of the following active section with the point of insertion on the front wall of the preceding active section, the radial distance of said point of intersection from the axis being longer than the radial distance of the outlet openings.
  • the directing profile has the shape of a bent line, of which the part directed towards the outlet openings of the active section forms a larger angle with the axis than its reversed part.
  • a still further feature is that the directing profile has the shape of a curve inscribed into a bent line.
  • Still another feature is that the spacing between the separate sections is shorter at more distant points from the weft inserting nozzle.
  • the advantage of the weft inserting channel according to the present invention consists in that a smooth fusion of the additional pressure air jets from the active sections and the main pressure air jet from the weft inserting nozzle is made possible, thus improving the economy of the pressure air used and securing an optional course of the velocity of the weft to be inserted throughout the whole length of the shed.
  • a further advantage consists in increasing the working width of the weaving machine.
  • a very important advantage consists in the possibility of substantially reducing the cross section of the weft inserting channel; this causes a reduction of the shed dimensions, a reduction in weight of the weft inserting channel and thus a reduction of the inertial forces.
  • the present invention is advantageous particularly with weft inserting openings having a cross section less than 1 sq. cm.
  • FIG. 1 represents a diagrammatic section through a part of the length of a weft inserting channel in accordance with the invention with both active and passive sections, the diameters of the weft inserting openings of all active sections being equal;
  • FIG. 2 is a similar view of a weft inserting channel in accordance with the invention, the active sections having throughout the length of the shed, continuously increasing diameters of the weft inserting openings;
  • FIG. 3 is a partial diagrammatic section through one active section and the adjacent passive section, the directing profile of the passive section being formed by a broken or angular line;
  • FIG. 4 is a view similar to FIG. 3 of a further embodiment in which the directing profile of the passive section is made in the form of a curve;
  • FIG. 5 is a view in rear elevation of an active section of the weft inserting channel of FIG. 1;
  • FIG. 6 is a view in transverse section through the element shown in FIG. 5, the section taken along the line 6-6 in FIG. 5;
  • FIG. 7 is a schematic view of the weft inserting channel of the invention and the parts attendant thereto, the
  • the weft inserting channel consists of passive sections 1 provided with a weft inserting opening 2 preferably of circular or approximately circular cross section and of active sections 3 also provided with a weft inserting opening 4 with a cross section of the same shape.
  • the sequence of the separate sections 1, 3 is chosen in such manner that between two active sections 3, 3' severalpassive sections 1, 1' are interposed, of which only two are shown in FIGS. 1 and 2 for the sake of simplicity.
  • the passive sections 1, l are provided about the circumference of the weft inserting opening 2 with a chamferlike directing profile 5, which centripetally directs the pressure air jet intermittently leaving the weft inserting nozzle in the directions S, i.e., in the direction of weft insertion of a weft yarn, and simultaneously directing the additional air jets from the active sections 3, 3'
  • the active sections 3, 3' are also provided about the circumference of the weft inserting opening 4 with a chamferlike directing profile 6 which is directed in the same manner and for the same purpose as the passive sections 1, 1'
  • the active sections 3, 3 are provided on their front walls 7 in the direction S with discharge openings 8 for the additional pressure air.
  • All sections 1, 1' and 3, 3 are arranged with their weft inserting openings 2, 4 disposed symmetrically about axis 9 of the weft inserting channel.
  • all active sections 3, 3 have the same diameter of weft inserting openings 4.
  • the diameter of the weft inserting openings 2 of passive sections 1, 1' is larger than the diameter of the weft inserting openings 4 of active-sections 3, 3
  • the tangential points of the directing profiles 5 of passive sections 1, 1 are situated on the connecting line of the tangential points of the directing profile 6 of one active section 3 with the front wall of the preceding active section 3.
  • the point of intersection 11 of the connecting line 10 with the front wall 7 is situated on the front wall 7 at a farther radial distance from axis 9 of the weft inserting channel than the discharge openings 8.
  • the main pressure air jet from the weft inserting n02- I zle flowing through the weft inserting openings 2 and 4 of sections 1 and 3 is, together with the weft, directed centripetally by the directing profiles 5 and 6.
  • all lines 10 connecting the tangential points of the directing profiles 5 of the passive sections 1, 1', and the tangential points of the directing profile 6 of the following active section 3 are mutually parallel; the point of intersection 11 of connecting line 10 with the front wall 7 ofthe preceding active section 3 is situated at a farther radial distance from axis 9 of the weft inserting channel than the discharge openings 8 of this active section 3.
  • a weft inserting channel constructed in that manner has a continuously increasing diameter of weft inserting openings 2, 4 in the direction of the pressure air jet.
  • the directing profile 5 of passive section 1 can have the shape of a broken or angular line 12, while its part directed towards the discharge open ings 8 forms with a larger angle with axis 9 of the weft inserting openings 2, 4 than its reversed part. In that embodiment, a more favorable air flowing is achieved,
  • the directing profile 5 can have also the shape of a curve 13 (FIG. 4) which is advantageously inscribed into the broken line 12 shown in FIG. 3.
  • the weft inserting channel can be constituted by a combination of all the above exemplary embodiments.
  • the spacings of the separate sections 1, 1 3, 3 need not be identical throughout the whole length of the weft inserting channel, and might 'e.g. diminish in the direction of weft insertion.
  • the present invention can be applied particularly for the construction of weft inserting channels for pneumatic weaving machines of large weaving width, and advantageously for constructing weft inserting channels with a cross section of the weft inserting openings less than 1 sq. cm.
  • the active section of the channel there shown has an angularly directed arm 14 and a vertically directed arm 15, there being a vertical weft receiving slot 16 between the free end of the arm 14 and the surface of the arm which the arm 14 confronts.
  • the active element 3 has a hollow stem 17 the lower end of which is provided with internal threads 19 by means of which the hollow space within the stem 17 and the arms 14 and 15 is connected to a source of air under pressure.
  • FIG. 7 there is shown a weft inserting channel having a series of aligned passive sections 1 and active sections 3, the active sections being interspersed between successive passive sections.
  • a pressure air weft inserting jet 20 is disposed at the rear end of the channel with the nozzle thereof directed in a forward direction, that is the direction of weft insertion.
  • the pressure air jet weft inserting nozzle 20 is supplied by a source of air under pressure through a conduit 22.
  • the spaces within the active channel sections 3 are supplied with air under pressure from the source 21 through conduits 24, as shown.
  • a control circuit 25 extends to the source of pressure air 21, such source including solenoid valves selectively energized through the control circuit 25 whereby to direct pressure air from the source 21 through the conduits leading therefrom to the elements 3 and 20 in periodically spaced weft inserting pulses.
  • said active sections having weft inserting openings of substantially circular cross-section, said active sections each having a directing profile forming at least a part of its weft inserting opening, each of said active sections having a front wall facing in the direction of weft inserting and having discharge openings arranged around said weft inserting opening therein, each of said passive sections having a weft inserting opening of substantially circular cross-section, the weft inserting openings of all of the active and passive sections lying on a common axis, which is also the axis of the channel, said passive sections being arranged between successive active sections, said passive sections having a directing profile arranged in said weft inserting openings thereof, a pressure air jet weft-inserting nozzle arranged at the rear end of the channel and directing a jet of air in the forward, weft inserting direction, a source of pressure air coupled with said pressure air jet weft-inserting nozzle, a source of additional pressure air coupled
  • each passive section has a cross-section in the shape ofa line having two angularly related parts, one part of which, directed towards the discharge openings of the active section, forms with said axis a larger angle than the other part of said line.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00275328A 1971-07-27 1972-07-26 Weft inserting channel for pneumatic weaving machines Expired - Lifetime US3847187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS5472A CS149198B1 (enrdf_load_stackoverflow) 1971-07-27 1971-07-27

Publications (1)

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US3847187A true US3847187A (en) 1974-11-12

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US00275328A Expired - Lifetime US3847187A (en) 1971-07-27 1972-07-26 Weft inserting channel for pneumatic weaving machines

Country Status (8)

Country Link
US (1) US3847187A (enrdf_load_stackoverflow)
JP (1) JPS5311590B2 (enrdf_load_stackoverflow)
CH (1) CH535851A (enrdf_load_stackoverflow)
CS (1) CS149198B1 (enrdf_load_stackoverflow)
DE (1) DE2236759C3 (enrdf_load_stackoverflow)
FR (1) FR2147251B1 (enrdf_load_stackoverflow)
GB (1) GB1401206A (enrdf_load_stackoverflow)
IT (1) IT963348B (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978896A (en) * 1974-05-21 1976-09-07 Larmit Adrianus Johannes Franc Weft thread inserting nozzle
FR2325753A1 (fr) * 1975-09-27 1977-04-22 Vyzk Vyvojovy Ustav Zavodu Procede et dispositif pour l'introduction de fils de trame au moyen d'un peigne a lamelles de metier a tisser a buse de soufflage
US4125133A (en) * 1976-09-03 1978-11-14 Nissan Motor Company, Limited Air jet loom with improved air guiding comb
US4183382A (en) * 1976-02-27 1980-01-15 Walter Scheffel Apparatus for weft insertion in a weaving loom
WO1980000087A1 (en) * 1978-06-12 1980-01-24 Petschner G Process and device for inserting the weft by means of a luid flow in a loom
US4190067A (en) * 1975-09-27 1980-02-26 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Method and apparatus for insertion of weft threads in jet weaving machines
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
EP0053216A1 (de) * 1980-11-28 1982-06-09 GebràœDer Sulzer Aktiengesellschaft Hilfsblasdüse für eine Luftstrahlwebmaschine
US4371007A (en) * 1978-06-12 1983-02-01 Walter Scheffel Picking method and apparatus on textile looms involving the use of a fluid medium
US4442871A (en) * 1979-06-30 1984-04-17 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft yarn guide for a fluid jet loom
EP0111906A1 (en) * 1982-12-22 1984-06-27 Nissan Motor Co., Ltd. Weft picking device of air jet type weaving loom
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom
US5323814A (en) * 1991-04-01 1994-06-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Reed pieces with recessed weft guide openings having inclined surfaces
US6416540B1 (en) 2000-11-01 2002-07-09 Sandip V. Mathur Magnetically actuated cleanable stent and method
US20040020548A1 (en) * 2002-08-01 2004-02-05 Tsudakoma Kogyo Kabushiki Kaisha Reed for weaving

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124968A (en) * 1976-04-08 1977-10-20 Nissan Motor Device for inserting weft in airrjet loom
CS195638B1 (en) * 1978-06-02 1980-02-29 Vladimir Kuda Active confuser lamella for pneumatic weaving looms
JPS5926688B2 (ja) * 1978-09-15 1984-06-29 株式会社豊田自動織機製作所 ジエツトル−ムにおける緯入れ装置
JPS55122048A (en) * 1979-03-15 1980-09-19 Toyoda Automatic Loom Works Auxiliary nozzle of jet loom
US4391305A (en) * 1979-05-18 1983-07-05 Nissan Motor Co., Ltd. Weft picking device of air jet type weaving loom
JPS5930820B2 (ja) * 1979-07-18 1984-07-28 株式会社豊田自動織機製作所 流体噴射式織機における緯入れガイド部の構造
JPS6154689U (enrdf_load_stackoverflow) * 1984-09-16 1986-04-12

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139118A (en) * 1958-05-09 1964-06-30 Svaty Vladimir Pneumatic weft guides for looms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139118A (en) * 1958-05-09 1964-06-30 Svaty Vladimir Pneumatic weft guides for looms

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978896A (en) * 1974-05-21 1976-09-07 Larmit Adrianus Johannes Franc Weft thread inserting nozzle
FR2325753A1 (fr) * 1975-09-27 1977-04-22 Vyzk Vyvojovy Ustav Zavodu Procede et dispositif pour l'introduction de fils de trame au moyen d'un peigne a lamelles de metier a tisser a buse de soufflage
US4190067A (en) * 1975-09-27 1980-02-26 Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi Method and apparatus for insertion of weft threads in jet weaving machines
US4183382A (en) * 1976-02-27 1980-01-15 Walter Scheffel Apparatus for weft insertion in a weaving loom
US4328842A (en) * 1976-02-27 1982-05-11 Walter Scheffel Apparatus for weft insertion in a weaving loom
US4125133A (en) * 1976-09-03 1978-11-14 Nissan Motor Company, Limited Air jet loom with improved air guiding comb
US4371007A (en) * 1978-06-12 1983-02-01 Walter Scheffel Picking method and apparatus on textile looms involving the use of a fluid medium
WO1980000087A1 (en) * 1978-06-12 1980-01-24 Petschner G Process and device for inserting the weft by means of a luid flow in a loom
US4442871A (en) * 1979-06-30 1984-04-17 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft yarn guide for a fluid jet loom
DE3141209A1 (de) * 1980-10-16 1982-06-09 Mcginley Thomas F Webverfahren und webstuhl zur durchfuehrung des verfahrens
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
EP0053216A1 (de) * 1980-11-28 1982-06-09 GebràœDer Sulzer Aktiengesellschaft Hilfsblasdüse für eine Luftstrahlwebmaschine
EP0111906A1 (en) * 1982-12-22 1984-06-27 Nissan Motor Co., Ltd. Weft picking device of air jet type weaving loom
US4538649A (en) * 1982-12-22 1985-09-03 Nissan Motor Co., Ltd. Weft picking device of air jet type weaving loom
US4907627A (en) * 1988-10-27 1990-03-13 Picanol Nv Weft guide and shed retainer for a fluid jet loom
US5323814A (en) * 1991-04-01 1994-06-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Reed pieces with recessed weft guide openings having inclined surfaces
US6416540B1 (en) 2000-11-01 2002-07-09 Sandip V. Mathur Magnetically actuated cleanable stent and method
US20040020548A1 (en) * 2002-08-01 2004-02-05 Tsudakoma Kogyo Kabushiki Kaisha Reed for weaving
US6968865B2 (en) * 2002-08-01 2005-11-29 Tsudakoma Kogyo Kabushiki Kaisha Reed for weaving

Also Published As

Publication number Publication date
FR2147251A1 (enrdf_load_stackoverflow) 1973-03-09
DE2236759B2 (de) 1974-02-07
JPS5311590B2 (enrdf_load_stackoverflow) 1978-04-22
DE2236759A1 (de) 1973-02-08
CS149198B1 (enrdf_load_stackoverflow) 1973-05-24
FR2147251B1 (enrdf_load_stackoverflow) 1976-10-29
GB1401206A (en) 1975-07-16
CH535851A (de) 1973-04-15
DE2236759C3 (de) 1974-09-05
IT963348B (it) 1974-01-10
JPS4833155A (enrdf_load_stackoverflow) 1973-05-08

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