US3367373A - Weft inserting nozzle - Google Patents

Weft inserting nozzle Download PDF

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Publication number
US3367373A
US3367373A US527701A US52770166A US3367373A US 3367373 A US3367373 A US 3367373A US 527701 A US527701 A US 527701A US 52770166 A US52770166 A US 52770166A US 3367373 A US3367373 A US 3367373A
Authority
US
United States
Prior art keywords
tube
slot
double
opening
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
US527701A
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English (en)
Inventor
Fransen Theodorus
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.)
Machinefabriek L te Strake NV
Original Assignee
Strake Maschf Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Strake Maschf Nv filed Critical Strake Maschf Nv
Application granted granted Critical
Publication of US3367373A publication Critical patent/US3367373A/en
Anticipated expiration legal-status Critical
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
    • 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
    • D03D47/3006—Construction of the nozzles
    • D03D47/3013—Main nozzles
    • 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

  • the improvement comprises a double-walled tube
  • the double walls of the tube being connected by radial walls forming'the sides of the slot,' .and.the tube havingan inlet end provided with an inlet opening into the space between the double walls for admitting a fluid under pressure, and having an outlet end provided with an outlet-opening,” for'discharging fluid from the space between the double walls, which is annular and is 'interrupted'b'y the slot, the central passage of the tube adapted to conduct a flow of secondary air induced by the stream of fluid issuing from the annular opening, to carry a weft thread into such stream of fluid.
  • the invention relates to improvements in or relating to a weft inserting device to be used in shuttleless looms, in which a weft is blown into the shed by means of a fluid under pressure.
  • a weft inserting device heretofore known comprised a jet nipple and injector means cooperating with said jet nipple and having a longitudinal slot as described in U.S. Patent No. 2,925,833.
  • an injector tube is situated around a single jet nozzle, which injector tube is provided with a longitudinal slot to facilitate passage of a remaining part of the weft, which is to be blown into the shed of a loom.
  • the object of this invention is to provide a weft inserting device in which a strong suction action for supplying secondary air can be created without direct striking of the thread by a violent jet of the fluid when the thread at the start of the weft inserting operation still has a low running speed and in which a suction opening in the injector tube can be very large for receiving the thread and the secondary air.
  • a mantle which is generally in the form of a tube that is provided with a slot and is double walled.
  • the walls of said double walled tube enclose an internal space between them, which space is closed in at the sides of said slot and the walls at the delivery end of said tube form an annular discharge opening which is interrupted at said slot.
  • a practical embodiment according to the invention is attained in that the double walled tube at the end opposite to the annular discharge opening merges into a part, which is offset laterally of the axis of said tube.
  • the part of the double walled tube which is substantially offset laterally of the axis of said tube gradually merges into a flattened part to the interior of which a line for air under pressure is connected.
  • the invention provides an annular fluid discharging device surrounding a central passage for the thread.
  • FIG. 11 is .a vertical. section throughaa weft-inserting device according to the invention, whichweft inserting device is to be used in connection with a.loom.
  • -FIG. 2 is a perspective viewof; the doublewalledtube wef t inserting deviceaccording to theinventionun Description of thepreferred embodiment Laterally of the frame of a loom a'we'ft inser tin g de- .vice is mounted on stationary part 1 of the loom.
  • the weft inserting device consists of a tube 2 having a double wall consisting of the concentrically arranged inner wall 3 and outer wall 4. A space is present between the inner wall 3 and the outer wall 4. This space is connected to a supply line 5 for air under pressure.
  • the tube 2 is provided with a slot 6 extending longitudinally of the tube 2.
  • this slot is to free the weft from the device as described in US. Patent No. 2,925,833.
  • the walls 3 and 4 are connected at this slot by walls 7 and 8 extending in a radial direction.
  • At the end of the tube 2 there is an annular outlet or discharge opening 9 between the walls 3 and 4.
  • This annular discharge opening is interrupted at the slot 6 as is clearly shown in FIG. 2.
  • air under pressure from a line 5, which is connected to a source of compressed air can flow into the space between the walls 3 and 4 and can flow out of the annular discharge opening 9.
  • the tube 2 merges into a part, which is substantially offset laterally of the axis of the tube 2 at the end opposite to the annular discharge opening 9.
  • This shielding tube is indicated by 12 in FIG. 1.
  • the mantle of the shielding tube 12 is single-walled and this wall 13 is indicated in the longitudinal section in FIG. 1.
  • the shielding tube possesses also a slot for releasing the weft and the side edge of this slot is visible.
  • the slot in the shielding tube 12 is positioned above the slot in the tube 2 as appears from FIG. 1. Both slots are thus arranged in a common vertical plane running through the axis of the tube 2. Both the tube 2 and the shielding tube 12 are symmetrical about this plane.
  • the shielding tube 12 is of generally the same shape as the tube 2, although larger in size, and therefore possesses also an opening, which is similar to the opening 10.
  • opening in the shielding tube is generally indicated by -l5.'As described above a minimum consumption of air and a large suction opening for the secondary air and thereby also for the thread can be obtained, whereas still a good catching of the thread in the air jet can be obtained.
  • the thread is drawn from a thread package 16 indicated in FIG. 3 by means of conical rollers 17 and 18 situated within the housing of the loom. Further the thread 19 runs from the rollers 17,
  • a weft inserting device for introducing a weft into a shed of a loom by means of a fluid under pressure, wherein the improvement comprises a substantially annular double-walled tube having a longitudinal slot, the double walls of the tube being connected by radial walls forming the sides of the slot and defining a space therebetween, the tube being provided at one end with an inlet opening into the space between the double walls for admitting a stream of fluid under pressure therein, and an annular outlet at its other end for discharging fluid from the space between the double walls, the outlet being interrupted by the slot, the central portion of the tube being adapted to conduct a flow of secondary air induced by the stream of fluid issuing from the annular opening, to carry a weft thread into such stream of fluid.
  • a weft inserting device according to claim 1 wherein at the inlet end of the tube the slot flares so that the double-walled tube merges into a double-walled part which is offset laterally from the axis of the tube.
  • a weft inserting device according to claim 2 wherein the laterally offset part of the double-walled tube merges into a flat double-walled portion at the inlet end of the tube.
  • a weft inserting device according to claim 1 wherein a slotted co-axial shielding tube is disposed around the double-walled tube and is radially spaced therefrom.
  • a weft inserting device according to claim 4 wherein the shielding tube extends longitudinally beyond the outlet end of the double-walled tube.
  • a weft inserting device wherein the slot of the double-walled tube and the slot of the shielding tube are situated in a common plane running through the common axis of the tubes.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US527701A 1965-02-19 1966-02-16 Weft inserting nozzle Expired - Lifetime US3367373A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6502158A NL6502158A (cs) 1965-02-19 1965-02-19

Publications (1)

Publication Number Publication Date
US3367373A true US3367373A (en) 1968-02-06

Family

ID=19792428

Family Applications (1)

Application Number Title Priority Date Filing Date
US527701A Expired - Lifetime US3367373A (en) 1965-02-19 1966-02-16 Weft inserting nozzle

Country Status (6)

Country Link
US (1) US3367373A (cs)
BE (1) BE675867A (cs)
CH (1) CH432409A (cs)
DE (1) DE1535548A1 (cs)
GB (1) GB1088584A (cs)
NL (1) NL6502158A (cs)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519030A (en) * 1967-09-26 1970-07-07 Geert Jan Vermeulen Method for projecting a thread under influence of a confined jet of a pressurized fluid
US4290460A (en) * 1978-08-01 1981-09-22 Saurer-Diederichs Active auxiliary nozzle for a shuttle-less loom with pneumatic weft insertion
US5341977A (en) * 1988-08-17 1994-08-30 Teijin Seiki Company Limited Yarn drawing-in nozzle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8007127A (nl) * 1980-12-31 1982-07-16 Rueti Te Strake Bv Inrichting voor het door middel van een stromend medium inbrengen van een draad in het weefvak van een pneumatische weefmachine.
US4671708A (en) * 1986-01-22 1987-06-09 James Hurd Debris collector and cooler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925833A (en) * 1957-06-15 1960-02-23 Strake Lambertus Te Weft inserting nozzle for looms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925833A (en) * 1957-06-15 1960-02-23 Strake Lambertus Te Weft inserting nozzle for looms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519030A (en) * 1967-09-26 1970-07-07 Geert Jan Vermeulen Method for projecting a thread under influence of a confined jet of a pressurized fluid
US4290460A (en) * 1978-08-01 1981-09-22 Saurer-Diederichs Active auxiliary nozzle for a shuttle-less loom with pneumatic weft insertion
US5341977A (en) * 1988-08-17 1994-08-30 Teijin Seiki Company Limited Yarn drawing-in nozzle

Also Published As

Publication number Publication date
BE675867A (cs) 1966-06-16
NL6502158A (cs) 1966-08-22
CH432409A (de) 1967-03-15
GB1088584A (en) 1967-10-25
DE1535548A1 (de) 1971-01-07

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