US3880198A - Weaving machine - Google Patents

Weaving machine Download PDF

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Publication number
US3880198A
US3880198A US357842A US35784273A US3880198A US 3880198 A US3880198 A US 3880198A US 357842 A US357842 A US 357842A US 35784273 A US35784273 A US 35784273A US 3880198 A US3880198 A US 3880198A
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US
United States
Prior art keywords
reed
tunnel
shed
nozzle
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
Application number
US357842A
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English (en)
Inventor
Geert Jan Vermeulen
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.)
Rueti Te Strake BV
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Rueti Te Strake BV
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Filing date
Publication date
Application filed by Rueti Te Strake BV filed Critical Rueti Te Strake BV
Application granted granted Critical
Publication of US3880198A publication Critical patent/US3880198A/en
Anticipated expiration legal-status Critical
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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
    • 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

  • a weaving machine comprises two sheets of warp threads which are momentarily held in diverging planes to form a weaving shed. and a main blowing nozzle arranged in a position at one side of such shed to introduce a weft thread through such shed by propelling the weft thread by means of a fluid discharged from the nozzle.
  • a reciprocable reed comprises a plurality of blades arranged parallel to the direction of reciprocation. each blade having a notch on its beating edge. such notches being aligned and forming a tunnel less than 8 mm. in diameter which in the retracted position of the reed has one end aligned with the main blowing nozzle.
  • An air injector carried by the reed is mounted in the other end of such tunnel and is adjustable longitudinally of the tunnel to accommodate various widths of cloth being woven.
  • such air injector having a central suction channel arranged to receive the head end of a weft thread propelled through the channel by the main blowing nozzle in order to maintain tension on the weft thread during the beating up movement of the reed.
  • the invention relates to a weaving machine of the type in which a transport tunnel for the weft threads is defined by a plurality of blades. each having a substantially U-shaped notch. which are movable along with the reed. and in which the weft threads are introduced from one side of the weaving shed to the other through said tunnel by the action of a flowing fluid discharged from of a main blowing nozzle positioned at one side of the shed.
  • tensioning means being provided at the other side of the shed adapted to tension at weft thread that has been inserted into the shed and to keep said thread in a tensioned state during the beating up movement.
  • the tensioning means comprise a mechanism formed by a catching means movable along with the reed and by a clamping means cooperating with said catching means during the beating up movement of the reed.
  • Another method of catching and tensioning the weft yarn inserted through the shed is described in British Patent specification l.t)88.749. according to which a plurality of catching threads. running parallel to the warp threads. are used, which are moved apart and brought together again in synchronism with the opening and closing of the shed so as to receive the end of the weft yarn extending beyond the shed. and are subsequently twisted together for trussing said ends and thereby keeping the weft yarn taut.
  • a common disadvantage of the known devices for tensioning wefts is that they do not provide for compensating for changes in length and differences in elasticity.
  • the tensioning means is constituted by an air injector carried by the reed and having a centrally disposed suction channel aligned with the end of the transport tunnel remote from the main blowing nozzle.
  • the great advantage of an air injector as a tensioning means for the wefts is that its tensioning effect is independent of any changes in length and variations as a result of differences in elasticity which are automatically compensated. while the weft end which remains extending beyond the selvage after the weft has been bound in. is automatically retracted from the injector by the beating movement of the reed.
  • the tensioning means are of a simple construction. without moving parts and without special control means.
  • tensioning a textile thread by means of an air injector is already generally known per However.
  • the problem with an air injector when applied to the purpose in view is that this air injector must be able to catch the head end of a weft inserted into the shed. from a plurality of positions which may be taken by the weft head end within the shed.
  • the suction nozzle which usually is mounted at the side of the machine remote from the weft blowing nozzle. for receiving the head end of an inserted weft and for later on discharging the cut end of said weft. generally has relatively large dimensions.
  • the weft cannot be drawn sufficiently tensioned by such a largely dimensioned suction nozzle; therefore in well-known weaving machines. apart from such a suction nozzle there are additional means for tensioning the weft.
  • the position of the head end of the weft at the end of the weft inserting phase be rather accurately defined. so that is will be sufficient to use an air injector which is of relatively small dimensions and therefore is indeed suitable as a tensioning means. and operates with an economically justified air consumption.
  • This condition of a relatively accurately defined weft head end position is satisfied by the present weaving machine in which the transport of the weft through the shed occurs through a transport tunnel defined by suitably shaped blades. more particularly a tunnel which is delimited by a plurality of blades moving along with the reed. which tunnel dependent on the weaving width cooperates with one or more auxiliary blowing nozzles spaced along the weaving width.
  • the invention relates to a weaving machine in which the cross sections ofthe reed tunnel and the suction aperture of the air injector respectively are less than about 8 mm. wide.
  • a special advantage of the air injector as a weft tensioning means is obtained when used in combination with a weft detecting means.
  • weft detecting purposes it has been proposed. e.g. in British patent specification l.236.346 to use a light source and a photoelectric receiver cooperating therewith.
  • the light source emits a single light ray in a transverse direction through the tunnel-like transport path of the weft. Since the position of the weft in its transport path. as indicated above. may strongly vary. it is necessary with such a detection device to constrain movement of the inserted weft transverse to the weft direction in order to be sure that the inserted weft will positively interrupt the light ray.
  • each air injector imparts a certain twinning to the weft resulting in making the weft balloon-shaped.
  • the weft tensioned in the relatively small cross section of the air injector according to the invention will in any case interrupt the light ray which is e.g. directed diametrally through said cross section.
  • the light source and the photoelectric receiver are provided in the wall of the discharge channel of the air injector.
  • FIG. I is a perspective view of part of the reed of a pneumatic weaving machine. provided with a device for tensioning the wefts according to the invention and FIG. 2 is a longitudinal section through the tensioning device according to the invention. in which at the same time the electrical diagram of the weft detection means is shown.
  • FIG. 1 a tunnel-like transport channel is formed in the weaving shed 3. constituted by the upper and low er warp threads 1 and 2. and by the reed blades 5 each having a substantially L-shaped notch opening towards the beating up line 4. which blades are encased in the reed beam 6.
  • the reed comprising the reed beam with the blades 5 is in HO. 1 in its retracted position. in this position the transport tunnel formed by the reed blades 5 is located opposite the weft inserting nozzle schematically indicated at 7. which is adapted to introduce a weft by means of an airjet into the said tunnel.
  • the reed generally extends at the side remote from the weft blowing nozzle 7 beyond the corresponding side edge of the cloth by a varying distance.
  • the air injector indicated 8 has been provided which is mounted. adjustable in the direction of the cloth width.
  • the airinjector 8. which is shown in FIG. 2 in longitudinal section. has a construction which is known per se and corresponds to that of the weft blowing nozzle.
  • the injector serves to receive the weft launched by the weft inserting nozzle 7 and also to tension it and keep it in a tensioned state during the heating up movement of the reed. To this end the injector 8 is supplied with air at the same time as or very shortly after the nozzle 7 and at least up to and including the end phase of the beating up movement ofthe reed.
  • the connection point for a flexible air hose is indicated at 9'.
  • the air injector 8 further comprises the components ot'a weft detecting device. namely a light source 10 and a photoelectric receiver ll.
  • the light source it] may be constituted by a miniature incandescent lamp. a Ga-As diode or similar small light source and is provided either directly in the wall of the discharge tube 8' of the injector 8. or may he in o tical communication with a fibre optics sunk into a radial bore in that wall.
  • the photoelectric receiver 1] e.g. comprises a photo diode which is provided diametrally opposite to the light source 10 in the wall of the discharge tube 8'.
  • the photo diode 11 issues a signal as a sign that indeed a weft has been inserted from the other side of the machine.
  • This signal may. as indicated in the diagram according to FIG. 2, be converted by an amplifier 12 into an electric signal necessary to keep the electric circuit of the drive of the machine energized.
  • a weaving machine comprising two sheets of warp threads which are momentarily held in diverging planes to form a weaving shed. and a main blowing nozzle arranged in a position at one side of such shed to propel a weft thread through such shed by means of a fluid discharged from said nozzle.
  • the improvement comprises a. a reciprocable reed comprising a plurality of blades arranged parallel to the direction of reciprocation. each blade having a notch in its beating edge. such notches being aligned and forming a tunnel having a crosssection less than 8 mm. wide which in the retracted position ofthe reed has one end aligned with the main blowing nozzle.
  • an air injector nozzle which is located wholly within said tunnel and has a central suction channel arranged to receive the head end of a weft thread propelled through said tunnel by the main blowing nozzle in order to maintain tension on the weft thread during the beating up movement of the reed. and a bracket on which the injector nozzle is mounted. which is slidably secured to the reed and is arranged to locate the injector nozzle in the end of said tunnel remote from the main blowing nozzle in a longitudinally adjusted position to accomodate the width of cloth being woven.
  • a weaving machine in which at detecting device is provided for detecting the wefts inserted into the transport tunnel comprising a light source and a photoelectric receiver. characterized in that said detecting device is provided in the wall of the injector,

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US357842A 1972-05-10 1973-05-07 Weaving machine Expired - Lifetime US3880198A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7206367A NL7206367A (de) 1972-05-10 1972-05-10

Publications (1)

Publication Number Publication Date
US3880198A true US3880198A (en) 1975-04-29

Family

ID=19816015

Family Applications (1)

Application Number Title Priority Date Filing Date
US357842A Expired - Lifetime US3880198A (en) 1972-05-10 1973-05-07 Weaving machine

Country Status (12)

Country Link
US (1) US3880198A (de)
JP (1) JPS5838544B2 (de)
AR (1) AR204696A1 (de)
AU (1) AU5552973A (de)
BE (1) BE799368A (de)
CA (1) CA987574A (de)
CH (1) CH559792A5 (de)
DE (1) DE2323650A1 (de)
FR (1) FR2184052B1 (de)
GB (1) GB1432681A (de)
IN (1) IN139084B (de)
NL (1) NL7206367A (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091512A (en) * 1976-06-15 1978-05-30 Champion International Corporation Deweaving apparatus for textile tapes
US4199971A (en) * 1976-10-28 1980-04-29 Ruti Machinery Works Ltd. Method for the manufacture of profiled reed blades for loom reeds
US4404996A (en) * 1980-08-11 1983-09-20 Ruti-Te Strake B.V. Method for inserting and stretching a measured weft yarn length into the weaving shed of a shuttleless weaving machine
US4432399A (en) * 1980-11-25 1984-02-21 Ruti Machinery Works Ltd. Filling-thread monitoring device for jet looms
US4465110A (en) * 1981-01-13 1984-08-14 Ruti-Te Strake, B.V. Jet weaving machine
US4471817A (en) * 1981-01-07 1984-09-18 Leesona Corporation Fluid weft insertion loom monitoring system
US4473096A (en) * 1979-08-06 1984-09-25 Leesona Corporation Weft end reception system
EP0133153A1 (de) * 1983-07-11 1985-02-13 Rüti-Te Strake B.V. Vorrichtung zur Befestigung eines Hilfsorgans an das Riet einer schützenlosen Webmaschine
US4565224A (en) * 1982-11-11 1986-01-21 Loepfe Brothers Limited Apparatus for monitoring weft thread in a weaving machine
EP0258887A2 (de) * 1986-09-04 1988-03-09 Nissan Motor Co., Ltd. Mehrphasiger Fluidum-Webstuhl
US4958664A (en) * 1988-03-22 1990-09-25 Lindauer Dornier Gesellschaft Gmbh Air jet loom with a jacquard frame and a variable drawing-in width
US4962794A (en) * 1988-10-28 1990-10-16 Milliken Research Corporation Air jet loom with integral stretch pipe and pick sensor
BE1017893A5 (nl) * 2007-12-10 2009-10-06 Te Strake Textile Bv Strekinrichting voor het strekken van een inslagdraad.
WO2011000561A1 (en) 2009-07-01 2011-01-06 Picanol N.V. Device and method for catching and stretching weft threads in weaving machine
CN110886043A (zh) * 2019-12-26 2020-03-17 鲁丰织染有限公司 降低喷气织机废边纱长度的拉伸辅喷系统
EP4261332A1 (de) * 2022-04-13 2023-10-18 Kabushiki Kaisha Toyota Jidoshokki Luftdüsenwebmaschine mit schussfadenspannvorrichtung

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7605882A (nl) * 1976-05-31 1977-12-02 Rueti Te Strake Bv Weefmachine.
DE2965070D1 (en) * 1979-08-08 1983-04-28 Sulzer Ag Nozzle arrangement for a jet loom
FR2508501A1 (fr) * 1981-06-30 1982-12-31 Saurer Diederichs Sa Dispositif determinant la longueur de trame a chaque transfert, sur une machine a tisser a vecteur fluide
JPH0444634Y2 (de) * 1986-04-15 1992-10-21
BE1000989A3 (nl) * 1987-10-09 1989-05-30 Picanol Nv Inrichting voor het strekken van een inslagdraad bij weefmachines.
DE4008058A1 (de) * 1990-03-14 1991-09-19 Stoll & Co H Einfaedel- und fadenwechselvorrichtung fuer fadenfuehrer
DE4118411C1 (en) * 1991-06-05 1992-08-20 Lindauer Dornier Gmbh, 8990 Lindau, De Device for airjet loom which minimises pick waste - including yarn drawing device on auxiliary reed connected to profiled reed on yarn arrival side, etc.
JP4410048B2 (ja) 2004-02-19 2010-02-03 株式会社豊田中央研究所 ジェットルームにおける緯糸張力付与装置
JP6372229B2 (ja) 2014-08-04 2018-08-15 株式会社豊田自動織機 ジェットルームにおける緯糸検出装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399701A (en) * 1964-11-03 1968-09-03 Strake Maschf Nv Reed for a loom
US3532138A (en) * 1967-09-22 1970-10-06 Rueti Ag Maschf Arrangement for the optical monitoring of weft threads
US3658098A (en) * 1970-10-22 1972-04-25 Hubert Peter Van Mullekom Weaving machine
US3744533A (en) * 1971-08-03 1973-07-10 Teijin Ltd Adjustment of filling tension in fluid jet loom and apparatus thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637349A (en) * 1948-12-24 1953-05-05 George W Dunham Shuttleless loom which pneumatically projects weft thread
JPS4528617Y1 (de) * 1967-02-07 1970-11-04
NL147798B (nl) * 1967-09-04 1975-11-17 Strake Maschf Nv Weefgetouw met een pneumatisch bediende bufferinrichting voor de inslagdraad.
BE757859A (nl) * 1969-10-22 1971-04-01 Strake Maschf Nv Weefmachine
GB1365903A (en) * 1970-08-07 1974-09-04 Teijin Ltd Method of and apparatus for controlling weft tension in a jet loom
NL7108526A (de) * 1971-06-21 1972-12-27

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399701A (en) * 1964-11-03 1968-09-03 Strake Maschf Nv Reed for a loom
US3532138A (en) * 1967-09-22 1970-10-06 Rueti Ag Maschf Arrangement for the optical monitoring of weft threads
US3658098A (en) * 1970-10-22 1972-04-25 Hubert Peter Van Mullekom Weaving machine
US3744533A (en) * 1971-08-03 1973-07-10 Teijin Ltd Adjustment of filling tension in fluid jet loom and apparatus thereof

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091512A (en) * 1976-06-15 1978-05-30 Champion International Corporation Deweaving apparatus for textile tapes
US4199971A (en) * 1976-10-28 1980-04-29 Ruti Machinery Works Ltd. Method for the manufacture of profiled reed blades for loom reeds
US4473096A (en) * 1979-08-06 1984-09-25 Leesona Corporation Weft end reception system
US4404996A (en) * 1980-08-11 1983-09-20 Ruti-Te Strake B.V. Method for inserting and stretching a measured weft yarn length into the weaving shed of a shuttleless weaving machine
US4432399A (en) * 1980-11-25 1984-02-21 Ruti Machinery Works Ltd. Filling-thread monitoring device for jet looms
US4471817A (en) * 1981-01-07 1984-09-18 Leesona Corporation Fluid weft insertion loom monitoring system
US4465110A (en) * 1981-01-13 1984-08-14 Ruti-Te Strake, B.V. Jet weaving machine
US4565224A (en) * 1982-11-11 1986-01-21 Loepfe Brothers Limited Apparatus for monitoring weft thread in a weaving machine
EP0133153A1 (de) * 1983-07-11 1985-02-13 Rüti-Te Strake B.V. Vorrichtung zur Befestigung eines Hilfsorgans an das Riet einer schützenlosen Webmaschine
US4601313A (en) * 1983-07-11 1986-07-22 Ruti-Te Strake B.V. Device for fixing an auxiliary member or accessory upon the reed of a shuttleless loom or weaving machine
EP0258887A2 (de) * 1986-09-04 1988-03-09 Nissan Motor Co., Ltd. Mehrphasiger Fluidum-Webstuhl
EP0258887A3 (de) * 1986-09-04 1990-06-13 Nissan Motor Co., Ltd. Mehrphasiger Fluidum-Webstuhl
US4958664A (en) * 1988-03-22 1990-09-25 Lindauer Dornier Gesellschaft Gmbh Air jet loom with a jacquard frame and a variable drawing-in width
US4962794A (en) * 1988-10-28 1990-10-16 Milliken Research Corporation Air jet loom with integral stretch pipe and pick sensor
BE1017893A5 (nl) * 2007-12-10 2009-10-06 Te Strake Textile Bv Strekinrichting voor het strekken van een inslagdraad.
WO2011000561A1 (en) 2009-07-01 2011-01-06 Picanol N.V. Device and method for catching and stretching weft threads in weaving machine
CN110886043A (zh) * 2019-12-26 2020-03-17 鲁丰织染有限公司 降低喷气织机废边纱长度的拉伸辅喷系统
EP4261332A1 (de) * 2022-04-13 2023-10-18 Kabushiki Kaisha Toyota Jidoshokki Luftdüsenwebmaschine mit schussfadenspannvorrichtung

Also Published As

Publication number Publication date
BE799368A (nl) 1973-08-31
FR2184052A1 (de) 1973-12-21
FR2184052B1 (de) 1975-08-22
GB1432681A (en) 1976-04-22
AU5552973A (en) 1974-11-14
IN139084B (de) 1976-05-01
DE2323650A1 (de) 1973-11-29
JPS5838544B2 (ja) 1983-08-23
JPS4954671A (de) 1974-05-28
AR204696A1 (es) 1976-02-27
CA987574A (en) 1976-04-20
CH559792A5 (de) 1975-03-14
NL7206367A (de) 1973-11-13

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