US3874421A - Carrier for weft insertion - Google Patents

Carrier for weft insertion Download PDF

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Publication number
US3874421A
US3874421A US422505A US42250573A US3874421A US 3874421 A US3874421 A US 3874421A US 422505 A US422505 A US 422505A US 42250573 A US42250573 A US 42250573A US 3874421 A US3874421 A US 3874421A
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US
United States
Prior art keywords
hook
inserter
weft
lever
warp
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
US422505A
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English (en)
Inventor
William Denis Grenville Mackie
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.)
James Mackie and Sons Ltd
Original Assignee
James Mackie and Sons 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 James Mackie and Sons Ltd filed Critical James Mackie and Sons Ltd
Application granted granted Critical
Publication of US3874421A publication Critical patent/US3874421A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D03D47/12—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
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • This invention relates to shuttleless looms of the transfer type, i.e., looms in which the weft thread is car ried through the warp shed by means of two spears or rapiers each being reciprocated into and out from the shed from opposite sides of the loom respectively one spear gripping the weft thread to carry the weft into the shed, the thread being then transferred at the centre of the shed to the other spear which is then driven outwardly to carry the thread through the remainder of the shed.
  • One form of weft inserter or spear (hereinafter referred to as an inserter of the type described) comprises a hook which is mounted (preferably pivotally) on the leading end of the inserter.
  • a yarn clamp surface is preferably but not necessarily provided adjacent the hook so that yarn can be trapped between the hook and the clamp surface.
  • Such inserters have hitherto been provided with a back plate which acts to deflect warp threads from the hook during withdrawal of the inserter from the shed.
  • This back plate is comparatively deep and extends to the front of the inserter spaced sideways from the hook to enable the other inserter to pass between it and the hook. Consequently the inserter in use had to be mounted on a bridge member so that the bottom of the back plate was above the top of the guide for the inserter drive tapes, which, together with the height of the plate, acted to increase the necessary height of the shed.
  • the general object of this invention is to reduce the height of the shed of a loom using an inserter of the type described, so as to reduce the movement needed during shed changeover and beat up.
  • an inserter of the type described with a member movable between an inoperative position in which it acts to deflect warp yarns from the hook on withdraw] of the inserter from the shed, and an operative position in which it acts to help guide weft yarn into the path of the hook.
  • the inserter may have a fixed hook, or a hook which is pivotally mounted to be lifted when it is desired to engage weft yarn but preferably the inserter is similar to that forming the subject of our co-pending U..S. application Ser. No. 392,906 which comprises two levers, one carrying the hook at its outer end and being pivotally mounted on the leading end of the inserter at a point adjacent the hook and the other being pivotally mounted between its ends and having its leading end movably connected to the trailing end of the first lever.
  • leading end of the said other lever is provided with a nose which extends beyond the point of connection of the two levers and which has a surface located alongside the hook and preferably above it, to act to deflect warp yarns from the hook on withdraw] of the inserter from the shed.
  • the free leading edge of the nose portion is curved downwardly so as to be below the level of the upper surface of the hook to form a substantially smooth deflector.
  • the nose portion When the lever is pivoted to pivot the hooked lever, the nose portion cocks upwardly to help to cause the weft yarn carried by the other inserter, to be led into the hook.
  • the underside of the nose portion is preferably curved upwardly towards the leading edge.
  • FIG. 1 is a side elevation of an embodiment of a right-hand inserter in accordance with the present invention
  • FIG. 2 is a view corresponding to FIG. 1 but showing the hook open to receive a weft thread from a lefthand inserter;
  • FIG. 3 is a perspective view of the inserter
  • FIG. 4 is a sketch showing the inserter in position on its drive tapes.
  • the inserter shown in the drawings comprises a hooked arm 2 pivoted at 4 adjacent its leading end and adjacent, but forward of, the hook 6.
  • the rear end 8 of the arm 2 is engaged in a notch 10 in a second arm 12 which is pivoted to the spear at 14 at a point between its ends.
  • the rear end of the second arm is urged by a spring 16 to a position in which the lower face of the hook is held against a shoulder 18 of the spear to provide a clamp.
  • the pivot 14 also carries a bowed lever 20 secured to the pivot and which operates to pivot the lever 12.
  • the nose portion 22 of the lever 12 extends alongside the hook 6 with its upper surface lying above that of the hook.
  • a fixed plate 24 which extends down from the loom frame over the warp threads.
  • the plate acts to depress the lever 20 and hence causes the lever 12 to pivot in a clockwise direction about the pivot 14 depressing the spring 16.
  • This movement causes the trailing end 8 of the lever 2 to be raised and the hook 6 to be pivoted in an anti-clockwise direction to the open position shown in FIG. 3.
  • the nose 22 of the lever 12 is cocked up with its under surface 26, which curves up towards its leading edge, forming a deflection member to cause the weft thread to pass over the back of the hook and into the groove 28 between the hook and the lever 2.
  • the width of the notch 10 may be comparatively large so that the nose will rise the required distance in advance of the hook.
  • the warp yarns are deflected above the bowed arm by means of a deflection plate 30 located between the bowed arm 20 and the lever 12 at the rear portion of the inserter.
  • the nose portion 22 which acts to deflect warp yarn from the hook 6 and the deflection plate 30 lie within the confines of the width of the inserter there is no need for the inserter to be connected to its drive tapes through a bridge or platform as would be the case if the deflector plate extended along the whole length of the inserter to protect the hook 6 as well as the lever 20.
  • the deflector plate 30 does not have to be spaced sideways from the body of the inserter since it is present only at the rear end of the inserter and does not have to permit the interposition of a left-hand inserter between it and the hook. No bridge member is therefore necessary and the overall height of the inserter is reduced so that the size of the shed of the loom with which the inserter is to be used, can also be reduced.
  • the warp threads are shown at W.
  • a weft inserter or spear for a shuttleless loom having a hook mounted on its leading end to engage weft thread wherein a warp deflector means is provided moveable between one position in which it enables weft yarn lying in the path of the hook to be engaged by the hook and another position in which said warp deflector means acts to deflect warp yarn from the hook on withdrawal of the inserters from the shed of the loom.
  • a weft inserter as recited in claim 1 in which said warp deflector means guides weft yarn into the path of said hook when said warp deflector means is in said one position.
  • a weft inserter as claimed in claim 3 in which the hook is provided at one end of a first lever which is pivotally mounted at the leading end of the inserter at a point adjacent the hook, a second lever, said second lever pivotally mounted between its ends with its leading end moveably connected to the trailing end of the first lever, the leading end of the second lever comprising said warp deflector means having a nose which extends beyond the point of connection of the two levers and which has a surface located along side the hook to deflect the warp yarn from the hook when in said other position with the hook lying against said clamp surface means.
  • a weft inserter as recited in claim 4 in which the free leading end of the nose portion of the second lever is curved and located below the level of the upper surface of the hook when in said other position to form a substantially smooth deflector.
  • a weft inserter as claimed in claim 5 in which the nose portion of the second lever, when said second lever is pivoted its one position, cocks upwardly to cause weft yarn carried by the second inserter to be let into the hook.
  • a weft inserter as claimed in claim 6 in which the nose portion of the second lever has an underside which is curved upwardly towards its leading edge.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US422505A 1972-12-14 1973-12-06 Carrier for weft insertion Expired - Lifetime US3874421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5782172A GB1460889A (en) 1972-12-14 1972-12-14 Shuttleless looms

Publications (1)

Publication Number Publication Date
US3874421A true US3874421A (en) 1975-04-01

Family

ID=10480110

Family Applications (1)

Application Number Title Priority Date Filing Date
US422505A Expired - Lifetime US3874421A (en) 1972-12-14 1973-12-06 Carrier for weft insertion

Country Status (14)

Country Link
US (1) US3874421A (fi)
JP (1) JPS4986669A (fi)
BE (1) BE808558A (fi)
BR (1) BR7309709D0 (fi)
CH (1) CH587367A5 (fi)
CS (1) CS174224B2 (fi)
DD (1) DD110067A5 (fi)
DE (1) DE2361199A1 (fi)
ES (1) ES421428A1 (fi)
FR (1) FR2210687B1 (fi)
GB (1) GB1460889A (fi)
IN (1) IN140739B (fi)
IT (1) IT1000849B (fi)
NL (1) NL7317066A (fi)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978897A (en) * 1975-06-06 1976-09-07 Rockwell International Corporation Weft extending carrier
US20070157989A1 (en) * 2006-01-06 2007-07-12 Sultex Ag Inserting rapier for a rapier weaving machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1582326A (en) * 1976-04-09 1981-01-07 Mackie & Sons Ltd J Looms
IT1095254B (it) * 1978-04-07 1985-08-10 Somet Meccanica Tessile S P A Pinza portante per telai di tessitura ad alimentazione continua della trama
FR2539768A1 (fr) * 1983-01-24 1984-07-27 Mat Textil Ste Alsa Const Systeme de protection, contre le duvet et la poussiere, du ressort des tetes d'aiguilles passe-trame dans un metier a tisser
FR2707304B1 (fr) * 1993-07-09 1995-08-11 Saurer Diederichs Sa Pince pour ensemble d'amenée de trame sur une machine à tisser.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665975A (en) * 1970-01-19 1972-05-30 Dornier Gmbh Lindauer Weft thread inserting mechanism for looms

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2048284A5 (en) * 1969-12-17 1971-03-19 Dornier Gmbh Lindauer Shuttleless weaving loom

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665975A (en) * 1970-01-19 1972-05-30 Dornier Gmbh Lindauer Weft thread inserting mechanism for looms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978897A (en) * 1975-06-06 1976-09-07 Rockwell International Corporation Weft extending carrier
US20070157989A1 (en) * 2006-01-06 2007-07-12 Sultex Ag Inserting rapier for a rapier weaving machine

Also Published As

Publication number Publication date
FR2210687A1 (fi) 1974-07-12
ES421428A1 (es) 1976-04-16
FR2210687B1 (fi) 1978-03-03
IN140739B (fi) 1976-12-18
DE2361199A1 (de) 1974-06-20
CH587367A5 (fi) 1977-04-29
BE808558A (fr) 1974-03-29
IT1000849B (it) 1976-04-10
JPS4986669A (fi) 1974-08-20
NL7317066A (fi) 1974-06-18
GB1460889A (en) 1977-01-06
CS174224B2 (fi) 1977-03-31
BR7309709D0 (pt) 1974-09-24
DD110067A5 (fi) 1974-12-05

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