US3237649A - Weaving machine - Google Patents

Weaving machine Download PDF

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Publication number
US3237649A
US3237649A US294970A US29497063A US3237649A US 3237649 A US3237649 A US 3237649A US 294970 A US294970 A US 294970A US 29497063 A US29497063 A US 29497063A US 3237649 A US3237649 A US 3237649A
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US
United States
Prior art keywords
yarn
shuttle
beat
nip
length
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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US294970A
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English (en)
Inventor
Fend Heinrich
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.)
Rheinmetall Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3237649A publication Critical patent/US3237649A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J3/00—Weavers' tools, e.g. knot-tying tools
    • D03J3/04—Shuttle-threading tools
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/26—Travelling-wave-shed looms

Definitions

  • the present invention relates to textile machinery and more particularly to means, in such machinery, for picking up, displacing and/or retaining the end of a length of yarn from a moving body.
  • the invention relates to means in weaving machines for picking up the end of a length of weft yarn from a moving shuttle containing said length of weft yarn before the shuttle enters a shed formed by warp threads, for displacing the said end of the length of yarn to the beat up line of the weave and for retaining it until anadjacent portion of the yarn has been tied into the weave.
  • the present invention has for its object to provide a yarn pick-up device the parts of which move at uniform speed and which therefore are not subject to such acceleration forces and therefore must not meet exceptional requirements as to rigidity and resistance.
  • Another object of the invention is to provide a device of this kind which will not subject the yarn to high stresses.
  • Still another object of the invention is to provide a device of the said kind which is capable of operating at higher speeds than the devices hitherto used for the same purpose.
  • FIGURE 1 is a plan view from above, of a device provided in a weaving machine for picking up the end of a weft-yarn from a moving shuttle and displacing it into the beat up line of the weave while retaining it until an adjacent portion has been tied into the weave;
  • FIGURE 2 is a vertical section, at a much enlarged scale, through the tip of a shuttle in the device of FIG- ICC 5.
  • the portion of the belt 3 which is comprised between the roller 4 and the transfer pulley 5 and which runs onto the latter forms therewith a convergent nip 6. That portion of the belt 3 is twisted through in such a manner that ahead of the nip 6 at which the belt runs onto the transfer pulley 5, the distance between the belt and the surface of the pulley 5 is greater at the bottom edge of the belt than at its upper edge, that is, the face of the belt which is to contact the surface of the pulley forms with the latter an angle opening downwards.
  • the described device is arranged in such a manner with reference to the weaving machine that the said nip 6 of the belt 3 with the transfer pulley 5 is situated above the path 7 of the shuttle 8 ahead of the point at which the latter enters the shed formed by the warp thread 16.
  • the point at which the belt runs off this pulley 5, forming therewith a divergent nip is situated at the same level as the nip 6 and is laterally displaced with reference to the shuttle path; it is substantially in alignment with the beginning of the beat up line 17 near the beat up point of the first beat up member 18.
  • Each shuttle 8 is moved along their path 7 in the direction of the arrow 9 in uniform spacing from each other in a manner not to be described here in detail.
  • Each shuttle has a cavity 10 which contains a length of weft yarn 11 cut to correspond with the width of the weave.
  • a short front end portion of the yarn initially is in the shape of an irregular coil 13 in a vertical crossbore 14 of the shuttle, this being assumed, for the purpose of illustration, to be a flattened modification of the cylindrical shuttle represented in FIGURE 4 of United States patent application, Serial No. 206,609, filed July 2, 1962, by Heinrich Fend and Hans Hentz.
  • any other type of shuttle adapted for receiving a length of yarn and in which one end of this length of yarn is disposed in such a manner that it can be carried off by a jet of air.
  • beat up members are individually movable in turn towards the beat up line 17 and back from it.
  • beat up members are indicated only symbolically at 18 and for detailed description of their design and operation, as well as of the design of the portions of the shuttles cooperating with them, reference should be made to my two copending United States patent applications Ser. Nos. 294,971 and 294,980 of even date herewith, both entitled Weaving Machine.
  • the described device operates as follows:
  • This erected yarn end portion thus reaches the nip 6 or which the belt 3 runs onto the transfer pulley 5, and there it is seized between the pulley 5 and the belt 3 which at that place runs at a small angle from the direction in which the shuttles 8 are travelling (shuttle portion a in FIGURE 4.)
  • Engagement of the yarn end portion 12 and its seizing between the belt 3 and the pulley 5 is facilitated by the fact that the portion of the belt which runs onto the pulley 5 is twisted whereby it constantly presents the same face to the yarn end 12, that it crosses the path of the shuttle 8, of its cross-bore 14 and of the yarn end 12, in a flat position and at a level higher than the lower edge of the pulley circumference, and that it moreover defines with the latter a wedge-shaped space the width of which decreases upwardly.
  • the end portion 12 of the yarn maintained between the belt and the pulley reaches a point in front of the beginning of the beat up line, whereupon the adjacent portion of the yarn is beaten up against the weave at the beat up line 17 by the first beat up member and eventually by one or more subsequent beat up members, whereupon at least some of the warp threads adjacent to which the weft yarn has been beaten up change their position to tie the considered Weft yarn into the fabric (shuttle positions d to e).
  • the described device for picking up the end portion 12 of each length of weft yarn 11 and for transferring it to the beat up line 17, which device comprises the belt 3 and the transfer pulley 5, has the advantage of having no reciprocating parts, so that excepting easily controllable centrifugal forces, no acceleration or deceleration forces occur.
  • the end portion 12 of the yarn is trans- 4 ferred from the nip 6, at which it is picked up from the shuttle by the device, to the beat up line Without any change of its absolute speed and with only a gradual change of direction. Accordingly, if the speed of the belt 3 is properly related to that of the shuttles 8, jerklike solicitations on the weft yarn are entirely avoided.
  • a device for picking up, displacing and retaining one end of a length of yarn from a moving body which device comprises at least two pulleys, an endless belt running over said pulleys and forming a nip with the peripheral surface of one of them, and means for guiding the said end of the length of yarn into the said nip. 7
  • a device for picking up the end of a length of weft yarn from a moving shuttle containing said length of yarn before the shuttle enters a shed formed by warp threads, for displacing the said end of the length of yarn to the beat up line of the weave, and for retaining it until a portion of the yarn has been tied into the weave which device comprises at least two pulleys, an endless belt running over said pulleys and forming a convergent nip and a divergent nip with the peripheral surface one of said pulleys, and means for guiding the said end of the length of yarn into the said convergent nip, said divergent nip starting at a point of the peripheral surface of said one pulley substantially in alignment with said heat up line adjacent the beginning thereof.
  • the device as claimed in claim 1 comprising a track for said moving body, in which the portion of said endless belt ahead of said nip is twisted in the sense whereby the nip point at the edge of the belt and said one pulley remote from said track is situated ahead of the nip point at the opposite edge of-the belt and the said nip widens from the said remote edge towards the said track.
  • the device as claimed in claim 1 comprising a track for said moving body, wherein said means for guiding the said end of the length of yarn into said nip device comprises at least one jet nozzle directed across said track into said nip for blowing the said end of the yarn from said moving body into said nip.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US294970A 1962-07-30 1963-07-15 Weaving machine Expired - Lifetime US3237649A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH911862A CH402761A (de) 1962-07-30 1962-07-30 Vorrichtung an Webmaschine zum Erfassen eines Schussfadenendes und zum Transportieren und Festhalten desselben bis zu seinem Abbinden

Publications (1)

Publication Number Publication Date
US3237649A true US3237649A (en) 1966-03-01

Family

ID=4348516

Family Applications (1)

Application Number Title Priority Date Filing Date
US294970A Expired - Lifetime US3237649A (en) 1962-07-30 1963-07-15 Weaving machine

Country Status (5)

Country Link
US (1) US3237649A (de)
CH (1) CH402761A (de)
DE (1) DE1286975B (de)
GB (1) GB1046964A (de)
SE (1) SE304731B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792723A (en) * 1972-02-08 1974-02-19 D Titov Weft thread end catching and holding mechanism
US4280537A (en) * 1979-08-29 1981-07-28 Onikov Eduard A Apparatus for gripping a running weft thread on travelling-wave looms

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787491A (en) * 1928-09-11 1931-01-06 Primavesi Otto Loom
GB605475A (en) * 1944-11-22 1948-07-23 Sulzer Ag Improvements in or relating to thread brakes
US2799295A (en) * 1953-01-08 1957-07-16 Juillard Yves Weaving device
US2845093A (en) * 1952-07-22 1958-07-29 Schiesser Ag Trikotfabriken Method of and means for weaving
FR1237034A (fr) * 1958-10-09 1960-07-22 Métier à tisser à mouvement ondulatoire
FR1227995A (fr) * 1958-06-27 1960-08-26 Zangs Ag Maschf Procédé de tissage et métier à tisser
US3050088A (en) * 1960-08-18 1962-08-21 C A Delius & Sohne Weft tensioning and inserting device for gripper shuttle looms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE579287C (de) * 1928-09-12 1933-06-23 Otto Primavesi Webstuhl

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787491A (en) * 1928-09-11 1931-01-06 Primavesi Otto Loom
GB605475A (en) * 1944-11-22 1948-07-23 Sulzer Ag Improvements in or relating to thread brakes
US2845093A (en) * 1952-07-22 1958-07-29 Schiesser Ag Trikotfabriken Method of and means for weaving
US2799295A (en) * 1953-01-08 1957-07-16 Juillard Yves Weaving device
FR1227995A (fr) * 1958-06-27 1960-08-26 Zangs Ag Maschf Procédé de tissage et métier à tisser
FR1237034A (fr) * 1958-10-09 1960-07-22 Métier à tisser à mouvement ondulatoire
US3050088A (en) * 1960-08-18 1962-08-21 C A Delius & Sohne Weft tensioning and inserting device for gripper shuttle looms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3792723A (en) * 1972-02-08 1974-02-19 D Titov Weft thread end catching and holding mechanism
US4280537A (en) * 1979-08-29 1981-07-28 Onikov Eduard A Apparatus for gripping a running weft thread on travelling-wave looms

Also Published As

Publication number Publication date
SE304731B (de) 1968-09-30
CH402761A (de) 1965-11-15
DE1286975B (de) 1969-01-09
GB1046964A (en) 1966-10-26

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