EP0019418A1 - Schussfadenführungskanal - Google Patents

Schussfadenführungskanal Download PDF

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Publication number
EP0019418A1
EP0019418A1 EP80301499A EP80301499A EP0019418A1 EP 0019418 A1 EP0019418 A1 EP 0019418A1 EP 80301499 A EP80301499 A EP 80301499A EP 80301499 A EP80301499 A EP 80301499A EP 0019418 A1 EP0019418 A1 EP 0019418A1
Authority
EP
European Patent Office
Prior art keywords
channel
guide means
mouth
air
weft guide
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.)
Withdrawn
Application number
EP80301499A
Other languages
English (en)
French (fr)
Inventor
John Dalton Griffith
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.)
Bonas Machine Co Ltd
Original Assignee
Bonas Machine Co Ltd
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 Bonas Machine Co Ltd filed Critical Bonas Machine Co Ltd
Publication of EP0019418A1 publication Critical patent/EP0019418A1/de
Withdrawn legal-status Critical Current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
    • D03D47/302—Auxiliary nozzles

Definitions

  • the present invention relates to weft guide means for use in an air jet loom wherein weft yarn is propelled through a warp shed by an air flow.
  • a weft guide means for an air jet loom including a channel defined by a plurality of spaced teeth which are shaped to form opposed sides, a bottom region, and an open mouth of the channel, a plurality of air jets spaced along the channel and positioned adjacent its mouth for directing air into the channel through said mouth to create an air flow therealong for carrying the weft yarn therealong, the inner faces of each tooth which define said sides and bottom region being shaped so as to constrain said air flow within the channel.
  • the guide means including a channel defined by a plurality of spaced teeth which are shaped to form opposed sides, a bottom region and an open mouth of the channel, a plurality of air jets spaced along the channel and positioned adjacent its mouth for directing air into the channel through said mouth to create an airflow therealong for carrying the weft yarn therealong, the jets being closely spaced from the mouth so that yarn being carried by said air flow is urged toward the jets during its movement along the channel.
  • a reed assembly which consists of a main shaft 10 mounted to oscillate about its longitudinal axis to cause beat-up movement of a reed 11.
  • a reed holder 12 mounted to oscillate about its longitudinal axis to cause beat-up movement of a reed 11.
  • the reed holder 12 includes an angularly upwardly extending reed support 14, against which the lower baulk 15 of the reed 11, is held by means of a series of spaced-apart studs 16.
  • a base portion 17 of a weft guide means yet to be described is mounted on the reed support 14, conveniently by the studs 16, and forwardly of the lower baulk 15 of the reed 11 (that is the opposite side of the lower baulk 15 to the reed support 14).
  • the weft guide means comprises a plurality of weft guide teeth 18, which define a channel 9 having opposed side walls, a base region 9a and mouth 9b.
  • the teeth extend upwardly from the base portion 17 of the weft guide means and are spaced-apart to enable the teeth to pass through the lower warp shed to position the channel defined by the teeth between the upper and lower sheds.
  • Each weft guide tooth 18 comprises a rear wall 20 (nearest the reed 11), a base 21, and a front wall 22 and as can be seen the guide teeth 18 are open-topped and the rear wall 20 extends to a greater height than the front wall 22.
  • the adjacent edges or faces of the walls 20 and 22 are angularly inclined so that, in the direction of weft travel, (indicated by the arrow A in Figure 3) the space between the front and rear walls 22, 20 of the weft guide teeth 18, reduces. This has the effect of deflecting the air flow inwardly and thus discourages escape of air flow between the teeth.
  • each tooth defining the bottom region of the channel is such as to encourage air flow to escape between adjacent teeth. This has the effect of urging the air flow downwards toward the base of the channel and thus reduces the tendency of the air flow to move toward the mouth and out of the channel.
  • the face of each tooth defining the base region of the channel may be planar and substantially parallel to the axis of the channel, or it may be inclined downwardly away from said mouth.
  • each of the auxiliary jet means comprises a supply pipe 25 which is mounted on the base portion of the weft guide means by a bracket 26 and studs 27.
  • Each supply pipe 25 is connected to a flexible air supply pipe 28, which itself is connected to a source of compressed air (not shown).
  • the supply pipe 25, as can best be seen in Figure 1 is so formed at its upper end region (the end which extends above the bracket 26) that its free end lies above mouth of the channel and between the front wall 22 and the rear wall 20 of the weft guide teeth.
  • the supply pipe 25 is provided at its free end with a nozzle which is directed in such manner that air issuing therefrom will be directed into the space between the walls of the teeth 18 and will therefore serve the purpose of carrying the weft yarn 29 along the channel through the warp shed.
  • the nozzle is closely spaced from the mouth of the channel so that the weft yarn is urged, by suction toward the nozzles during travel along the channel. This assists in maintaining control of feed of the yarn along the channel.
  • the distance between the nozzle and the mouth of the channel is less than the depth of the channel.
  • the nozzle aperture of each jet issues a generally conical jet of air and accordingly, the axis of the nozzle aperture may be substantially parallel with the longitudinal axis of the channel or it may be inclined slightly downwardly.
  • An air jet located at one side of the loom may be used for injecting the weft yarn into the channel and for assisting in carrying the weft yarn 29 across the warp shed.
  • the apparatus for producing the primary air jet is not described since it can take any known form.
  • each of the teeth 18 may be conveniently be flat, or angularly at an angle different to that of the sides thus to create a tendency for air loss between the teeth 18 to be generally from the base region of the teeth thus assisting in locating the weft yarn 29 within the space bounded by the three walls of the apertures and the auxiliary jet tubes.
  • weft guide means as consisting of a base portion 17 and a plurality of teeth 18 it will be appreciated that this element can be of unitary construction and in fact can conveniently be moulded from a rigid plastics material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP80301499A 1979-05-18 1980-05-08 Schussfadenführungskanal Withdrawn EP0019418A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7917346 1979-05-18
GB7917346 1979-05-18

Publications (1)

Publication Number Publication Date
EP0019418A1 true EP0019418A1 (de) 1980-11-26

Family

ID=10505246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301499A Withdrawn EP0019418A1 (de) 1979-05-18 1980-05-08 Schussfadenführungskanal

Country Status (2)

Country Link
EP (1) EP0019418A1 (de)
JP (1) JPS5620643A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422484A (en) * 1980-11-28 1983-12-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft guide device in a jet loom

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE686061A (de) * 1966-06-06 1967-02-01
CH482040A (de) * 1968-09-17 1969-11-30 Vyzk A Vyv Ustav Zd U Vseob St Lamelle eines aus einer Vielzahl solcher Lamellen gebildeten Schusseintragkanals für pneumatische Düsenwebstühle
FR2086212A1 (de) * 1970-04-21 1971-12-31 Te Strake Maschf
FR2325735A1 (fr) * 1975-09-26 1977-04-22 Siemens Ag Electrolyte cyanure a base d'argent pour le depot electrolytique de revetements de dispersions argent-graphite

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE686061A (de) * 1966-06-06 1967-02-01
CH482040A (de) * 1968-09-17 1969-11-30 Vyzk A Vyv Ustav Zd U Vseob St Lamelle eines aus einer Vielzahl solcher Lamellen gebildeten Schusseintragkanals für pneumatische Düsenwebstühle
FR2086212A1 (de) * 1970-04-21 1971-12-31 Te Strake Maschf
FR2325735A1 (fr) * 1975-09-26 1977-04-22 Siemens Ag Electrolyte cyanure a base d'argent pour le depot electrolytique de revetements de dispersions argent-graphite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4422484A (en) * 1980-11-28 1983-12-27 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Weft guide device in a jet loom

Also Published As

Publication number Publication date
JPS5620643A (en) 1981-02-26

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811118

RIN1 Information on inventor provided before grant (corrected)

Inventor name: GRIFFITH, JOHN DALTON