US3672406A - Method for transporting a weft thread through a shed and loom for performing said method - Google Patents

Method for transporting a weft thread through a shed and loom for performing said method Download PDF

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Publication number
US3672406A
US3672406A US83175A US3672406DA US3672406A US 3672406 A US3672406 A US 3672406A US 83175 A US83175 A US 83175A US 3672406D A US3672406D A US 3672406DA US 3672406 A US3672406 A US 3672406A
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United States
Prior art keywords
shed
jet
weft thread
fluid
transport
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Expired - Lifetime
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US83175A
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English (en)
Inventor
Geert Jan Vermeulen
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Individual
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Individual
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Publication of US3672406A publication Critical patent/US3672406A/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
    • D03D47/28—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
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • 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

  • ABSTRACT A method for transporting a weft thread through a shed using one or more jet nozzles for a flowing transport fluid characterized in that the jet noule is fed by a cyclically varying quantity of transport fluid.
  • the invention relates to a method for inserting a weft thread into a shed making use of one or more jet nozzles for a flowing transport fluid.
  • the invention also relates to a loom of the type in which the wefts are transported through the shed by means of one or more jet nozzles for a flowing transport fluid.
  • the invention proposes to feed the jet nozzle with a cyclically varying quantity of transport fluid.
  • the object aimed at thereby is to retard the building of the boundary layer and to obtain an optimal energy transmission from the transport jets to the wefts during the whole operative period of the jet nozzle while a weft is being transported through the shed.
  • the necessary quantity of transport fluid for transporting a weft in a predetermined time interval and through a predetermined distance through a shed, which fluid may be air can be decreased by -30 percent.
  • the amount of the savings in fluid of course depends on the function according to which the transport fluid supply to the jet noule varies.
  • FIG. 1 shows a perspective view of a shed and one jet nozzle directed with its outflow opening into said shed, and also the means to have the jet nozzle issue a pulsating jet of transport fluid, and
  • FIG. 2 shows a diagram indicating the air consumption by applying such a pulsating jet according to the invention as well as by applying a constant jet.
  • FIG. 1 the weft 2 presented at l is transported through the shed outlined by the upper warp sheet 3, the lower warp sheet 4 and the reed 5, by means of the jet cone 6 issued by the jet nozzle 7.
  • the warp 2 is contained in a boundary layer around the conical core of the jet 6.
  • the quantity of transport fluid, e.g., air issuing from the nozzle 7 per unit of time is not constant, however, but varies, e.g., according to the curve 8 in FIG. 2.
  • the curve 8 shows how the rate of flow of the transport fluid through the jet nozzle varies as a function of time t, and indicates the quantity 0 of transport fluid which has to be supplied per unit of time to the jet nozzle 7 in order to transport one weft through the shed within a predetermined time interval.
  • the same figure shows the quantity of transport fluid which is necessary when keeping the quantity of fluid issued per unit of time constant during the total operative period of the jet nozzle in order to transport one weft in the same time through the same distance through a shed. It appears thereby that the total air consumption is substantially smaller when the jet nozzle issues a cyclically varying quantity of transport fluid than if the supply of transport fluid remains constant.
  • FIG. 1 furthermore shows schematically that for realizing a pulsating transport fluid jet a slide type valve 9 may be used, the slide 10 of which is adapted to open and interupt in quick sequence the communication between the jet nozzle 7 and the source 11 of transport fluid by means of a schematically indicated actuating rod 12, which in its turn is controlled by a cam 13, the movement of which is derived from the main shaft of the weaving loom.
  • diaphragm valves may be used which comprise a valve closure element with negligable inertia which is of great advantage. Pulsatingvalves of the electro-magnetic type may also be employed.
  • a method of transporting a weft thread through a shed by discharging a jet of fluid under pressure to entrain the weft thread wherein the improvement comprises cyclically varying the amount of fluid discharged in the jet during the transport of a weft thread through the shed.
  • a loom comprising a jet nozzle for discharging a jet of fluid to transport a weft thread through the shed, wherein the improvement comprises apparatus for cyclically varying the amount of fluid discharged in the jet during the transport of a weft thread through the shed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US83175A 1969-10-22 1970-10-22 Method for transporting a weft thread through a shed and loom for performing said method Expired - Lifetime US3672406A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6915973A NL6915973A (fr) 1969-10-22 1969-10-22

Publications (1)

Publication Number Publication Date
US3672406A true US3672406A (en) 1972-06-27

Family

ID=19808202

Family Applications (1)

Application Number Title Priority Date Filing Date
US83175A Expired - Lifetime US3672406A (en) 1969-10-22 1970-10-22 Method for transporting a weft thread through a shed and loom for performing said method

Country Status (10)

Country Link
US (1) US3672406A (fr)
JP (1) JPS4830980B1 (fr)
BE (1) BE757861A (fr)
CA (1) CA940800A (fr)
CH (1) CH512608A (fr)
DE (2) DE2051445A1 (fr)
FR (1) FR2066364A5 (fr)
GB (1) GB1332682A (fr)
NL (1) NL6915973A (fr)
SE (1) SE363359B (fr)

Cited By (4)

* 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
US4303106A (en) * 1978-09-18 1981-12-01 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for carrying out the filling operation in a jet loom
US5086812A (en) * 1990-02-15 1992-02-11 Picanol N.V., Naamloze Vennootschap Weft thread supplying device with rotary throttle valve in airjet weaving machines
WO2006066616A1 (fr) 2004-12-24 2006-06-29 Picanol N.V. Soupape d’etranglement pour metiers a tisser

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS159574B1 (fr) * 1973-01-26 1975-01-31
CS179657B1 (en) * 1975-06-10 1977-11-30 Juraj Spisiak Wiring of apparatus for controlling active elements of weft inserting duct in jet weaving machines
CS188398B1 (en) * 1975-10-01 1979-03-30 Vladimir Kuda Rotary multivalve distributor of pressurized media
NL7701916A (nl) * 1976-02-27 1977-08-30 Scheffel Walter Werkwijze en inrichting voor het inbrengen van de inslag bij een weefgetouw.
NL7709425A (nl) * 1977-08-25 1979-02-27 Rueti Te Strake Bv Rietbalkeenheid.
JPS5691038A (en) * 1979-12-26 1981-07-23 Nissan Motor Wefting method of air jet type loom
CH647017A5 (de) * 1980-10-22 1984-12-28 Rueti Ag Maschf Luftversorgungssystem fuer eine pneumatische webmaschine.
CH648617A5 (de) * 1980-12-17 1985-03-29 Sulzer Ag Verfahren zum betrieb einer webmaschine.
DE3276123D1 (en) * 1982-12-24 1987-05-27 Sulzer Ag Device for operating an air jet loom
EP0134375A1 (fr) * 1983-08-24 1985-03-20 Maschinenfabrik Sulzer-Rüti Ag Dispositif pour faire fonctionner un métier à jet d'air et métier pourvu d'un tel dispositif
BE903156A (nl) * 1985-08-30 1986-02-28 Picanol Nv Klepinrichting voor de bediening van op een lade bevestigde blazers bij weefmachines
NL8600713A (nl) * 1986-03-20 1987-10-16 Picanol Nv Werkwijze voor de sturing van bijblazers bij het inbrengen van een inslagdraad, bij weefmachines; en inrichting hiertoe aangewend.
CS274515B1 (en) * 1987-12-29 1991-04-11 Pajgrt Jan Method of loosening and repairing weft defectively inserted into shed on jet loom

Cited By (6)

* 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
US4303106A (en) * 1978-09-18 1981-12-01 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Method and apparatus for carrying out the filling operation in a jet loom
US5086812A (en) * 1990-02-15 1992-02-11 Picanol N.V., Naamloze Vennootschap Weft thread supplying device with rotary throttle valve in airjet weaving machines
WO2006066616A1 (fr) 2004-12-24 2006-06-29 Picanol N.V. Soupape d’etranglement pour metiers a tisser
US20080105325A1 (en) * 2004-12-24 2008-05-08 Jozef Peeters Throttle Valve for Weaving Looms
US7699289B2 (en) 2004-12-24 2010-04-20 Picanol N.V. Throttle valve for weaving looms

Also Published As

Publication number Publication date
DE2051446C3 (de) 1974-11-21
CH512608A (de) 1971-09-15
BE757861A (nl) 1971-04-01
GB1332682A (en) 1973-10-03
CA940800A (en) 1974-01-29
DE2051445A1 (de) 1971-05-19
FR2066364A5 (fr) 1971-08-06
DE2051446B2 (de) 1974-04-18
DE2051446A1 (de) 1971-06-24
JPS4830980B1 (fr) 1973-09-26
DE2051445B2 (fr) 1975-04-03
SE363359B (fr) 1974-01-14
NL6915973A (fr) 1971-04-26

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