US3908708A - Means for guiding weft threads - Google Patents

Means for guiding weft threads Download PDF

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Publication number
US3908708A
US3908708A US317172A US31717272A US3908708A US 3908708 A US3908708 A US 3908708A US 317172 A US317172 A US 317172A US 31717272 A US31717272 A US 31717272A US 3908708 A US3908708 A US 3908708A
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United States
Prior art keywords
weft
hook
latch needle
weft thread
raising member
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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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US317172A
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English (en)
Inventor
Akira Nogai
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YKK Corp
Original Assignee
Yoshida Kogyo KK
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Publication date
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D35/00—Smallware looms, i.e. looms for weaving ribbons or other narrow fabrics

Definitions

  • a weft raising member is mounted adjacent the advanced position of the hook of a latch needle reciprocated alongside one edge of a fabric being woven on a shuttleless loom. Each time a weft thread is inserted through a warp shed by a carrier from the opposite side of the fabric, the weft raising member operates to raise the inserted weft thread against its tension and hence to cause the hook of the latch needle to pass thereunder. The weft raising member is lowered immediately thereafter to permit the weft thread to become straight again and caught in the open hook of the latch needle, which needle will then form a loop of the weft thread to anchor the same.
  • This invention relates generally to looms and in particular to shuttleless looms such for example as needle looms in which a carrier is employed in lieu of the conventional shuttle for inserting a weft thread through a shed of warp threads to be beaten u p tothe fell ofa fabric being woven and also to be formed into a selvedge along one edge of the fabric. More specifically, the invention is directed to a method and means for guiding the inserted weft thread.
  • the weft thread carried through the warp shed from one side of the fabric being woven thereon is engaged by the open hook of a latch needle reciprocably mounted on the other side of the fabric.
  • the engaged weft thread is then anchored by being drawn through the previously formed loop of the weft thread, and as this loop is subsequentlycast off over the closed hook of the latch needle a new loop is formed concurrently. This procedure is repeated to form a selvedge by the weft thread along the edgeof the fabric.
  • lt is also an object of this invention to'provide simple means which can be easily built in a shuttleless loom of known construction for guiding 'the'weft thread in accordance with the method of the invention.
  • the improved method of this invention comprises the steps of applying an upward pressure to a weft thread inserted through a warpshed to raise the same against its'tensionata portion adjacent an advanced position of a hook of a latch needle, causing the hook of the latch needleto pass under the raised portion of the inserted weft thread, and releasing the upward pressure whereby the inserted weft thread is caught in the hook of the latch needle as the same becomes straight again owing to its own tension.
  • the invention further provides means for guiding the weft thread in accordance therewith, comprising a weft raising member supported adjacent an advanced position of a book of alatch needle, and drive means for moving the weft raising rnember up and down in timed relationship with the operations of the latch needle and a carrier adapted toinsert the weft thread through a warp shed.
  • weft raising member By the provision of the weft raising member according to'the invention, no dipping or other vertical motion of the carrier or of the latch needle is required to ensure reliable catching of the weft thread by the hook of the lat'ch ne edle. Further by simple adjustment of the operation of the weft raising member, a weft thread of various sizes and materials can be used together with warp threads for weaving a fabric of any desired width.
  • FIG. 1 is a fragmentary side elevational view explanatory of the construction of a dual needle loom incorporating theimproved means of the invention
  • FIG. 2 is a framentary top plan view of the dual needle loomof FlGfl;
  • FIG. .3 is a vertical sectional view showing drive means for a weft raising member in the dual needle loom of FIGS. 1 and 2;
  • V FIGS. .4A, 4B and 4C, respectively, illustrate the progressive steps of weft guiding operation according to the invention by a series of fragmentary top plan views in the left-hand row and a corresponding, series of side elevational .views in the right-hand row.
  • the invention is hereinafter described more spe cifically as applied to a dual needle 100m of well known construction capable of simultaneously weaving twp strips of fabric such for example as tapes for use in slide fasteners.
  • An example of the dual needle loom is,illustrated in FIGS. 1.and 2 in orderto make clearthe advantages and features ofv this invention.
  • the exemplified loom includes a cooperative pair of carriers l0,
  • the dual needle loom further comprises, in accordance with conventional terminology, a shedding motion for dividing the warp threads as aforesaid, a let-off motion for delivering the warp threads at a regulated tension from a warp beam as the fabrics 13 are woven, and a take-up motion for rolling up the woven fabrics.
  • each of the carriers 10 is driven through a known linkage mechanism including four links 16, 17, 18 and 19 and an cecentric wheel 20 operatively combined together in such a manner that an eye 21 at the leading end of each car rier moves along the path indicated by the dot-anddash line in FIG. 2.
  • Each of the latch needles 14, also driven through a known linkage mechanism moves back and forth alongside one edge of each fabric 13 in the usual manner, with temporary stops at both extremities of its stroke.
  • the reed 15 is swung as indicated by the double-headed arrow in FIG. 1 by an arm 22 on a crankshaft 23 driven by a belt 24 in a well timed manner.
  • the invention is characterized essentially by the provision of a weft raising member 25 which moves up and down at regulated time intervals in the adjacency of the advanced position of the hook of each latch needle 14.
  • the weft raising members 25 in this embodiment of the invention are fixedly mounted on a rockshaft 26 extending horizontally through a machine frame 27 and are prevented from possible contact with the fabrics 13 by means of plates 28 secured between the weft raising members 25 and tables 29 on which the fabrics travel as they are woven.
  • the rocksh'aft 26 is driven through three interconnected links 30, 31 and 32 by an input or drive shaft 33 which rotates in alternating directions at suitable time intervals, in such a manner that the upwardly bent free end of each weft raising member intermittently moves up and down in timed relationship with the operations of the various other mechanisms of the loom for guiding the respective weft threads 11 as hereinafter discussed with reference to FIG. 4.
  • the latch needle 14 is held at a temporary standstill in a predetermined position whereas the carrier further travels through the warp shed to the opposite side of the fabric.
  • the thus inserted weft thread 11 is carried above the open hook 36 of the latch needle 14, the
  • weft raising member 25 momves as above mentioned in its upward stroke to raise the weft thread at llu, as indicated in FIG. 4B, against its tension.
  • the open hook of the latch needle is thus caused to pass under the raised portion 11a of the weft thread.
  • the weft raising member is subsequently rapidly lowered below the plane of the fabric 13, the weft thread becomes straight again due to its own tension and is now properly caught in the open hook of the latch needle, as indicated by the chain-dotted line in FIG. 4B.
  • the carrier 10 continues traveling along its predetermined path depicted in FIG. 2, while the latch needle 14 and the reed 15 start moving back toward the fell of the fabric 13.
  • thelatch 34 is'again turned by the brush 35 of FIG. 1 to close the hook 36 in which is caught the portion 11a of the weft thread.
  • a loop of the weft thread portion is drawn through the old loop 37 and is thus properly anchored for selvedgc formation.
  • the old loop is then cast off over the closed hook 37 of the latch needle.
  • the carrier 10 and the latch needle 14 have subsequently returned to their fully retracted or starting positions not shown in FIG. 4, the reed 15 beats the newly inserted weft thread 11 to the fell of the fabric 13.
  • I 1 In a shuttleless loom for weaving a fabric having a carrier for inserting a weft thread through a warp shed, a reed for bearing up said inserted weft and a reciprocable latch needle having a hook which is opened and closed by a latch for engaging the inserted weft thread and forming a loop in the weft, the improvement comprising a weft raising member pivotally supported adjacent an advanced position of said hook of said latch needle, and drive means for pivoting said weft raising member so that its weft engaging portion moves up and down in timed relationship with the operations of said carrier and said latch needle whereby said weft raising member is pivoted upward to raise the inserted weft thread against its tension at a point adjacent the advanced position of said hook of said latch needle and hence to cause said hook of said latch needle to pass under the raised portion of the inserted weft thread, said weft raising member being then pivoted downwardly rapidly to cause the inserted weft thread to be caught in said hook of said latch needle as the same becomes

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US317172A 1971-12-27 1972-12-21 Means for guiding weft threads Expired - Lifetime US3908708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP168072A JPS5417074B2 (it) 1971-12-27 1971-12-27

Publications (1)

Publication Number Publication Date
US3908708A true US3908708A (en) 1975-09-30

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US317172A Expired - Lifetime US3908708A (en) 1971-12-27 1972-12-21 Means for guiding weft threads

Country Status (9)

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US (1) US3908708A (it)
JP (1) JPS5417074B2 (it)
AU (1) AU465883B2 (it)
CA (1) CA980217A (it)
DE (1) DE2263054C3 (it)
FR (1) FR2166093B1 (it)
GB (1) GB1411239A (it)
IT (1) IT976154B (it)
NL (1) NL168018C (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996971A (en) * 1974-10-03 1976-12-14 Bonas Machine Company Limited Needle loom and method for producing knitted articles
US20230096264A1 (en) * 2019-04-10 2023-03-30 Textilma Ag Method for Pattern-Directed Formation of the Connection Point of an Effect Thread in the Woven Fabric

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29514298U1 (de) * 1995-09-06 1995-10-26 Textilma Ag, Hergiswil Webmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891583A (en) * 1955-02-07 1959-06-23 Cuckson Textiles Proprietary L Shuttleless looms
US3261376A (en) * 1965-07-09 1966-07-19 John D Riordan Apparatus for knitting selvages on narrow webs
US3288172A (en) * 1965-02-18 1966-11-29 Joh D Riordan Loop catching mechanism in narrow web loom
US3434506A (en) * 1965-11-20 1969-03-25 Mueller Jakob Weft yarn anchoring arrangement for needle looms
US3457966A (en) * 1966-10-12 1969-07-29 Sulzer Ag Method and apparatus for forming tucked-in selvages on fabrics woven on looms having bobbinless shuttles
US3601160A (en) * 1969-09-11 1971-08-24 Crompton & Knowles Corp Magnetic latch holding means for a selvage knitting needle in a narrow ware loom

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB552067A (en) * 1941-11-24 1943-03-22 Charles Clutsom Improvements in or relating to looms with stationary weft supplies
JPS5020442A (it) * 1973-06-29 1975-03-04

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2891583A (en) * 1955-02-07 1959-06-23 Cuckson Textiles Proprietary L Shuttleless looms
US3288172A (en) * 1965-02-18 1966-11-29 Joh D Riordan Loop catching mechanism in narrow web loom
US3261376A (en) * 1965-07-09 1966-07-19 John D Riordan Apparatus for knitting selvages on narrow webs
US3434506A (en) * 1965-11-20 1969-03-25 Mueller Jakob Weft yarn anchoring arrangement for needle looms
US3457966A (en) * 1966-10-12 1969-07-29 Sulzer Ag Method and apparatus for forming tucked-in selvages on fabrics woven on looms having bobbinless shuttles
US3601160A (en) * 1969-09-11 1971-08-24 Crompton & Knowles Corp Magnetic latch holding means for a selvage knitting needle in a narrow ware loom

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996971A (en) * 1974-10-03 1976-12-14 Bonas Machine Company Limited Needle loom and method for producing knitted articles
US20230096264A1 (en) * 2019-04-10 2023-03-30 Textilma Ag Method for Pattern-Directed Formation of the Connection Point of an Effect Thread in the Woven Fabric

Also Published As

Publication number Publication date
IT976154B (it) 1974-08-20
AU5042272A (en) 1974-06-27
DE2263054A1 (de) 1973-07-05
DE2263054B2 (de) 1978-08-24
JPS5417074B2 (it) 1979-06-27
GB1411239A (en) 1975-10-22
NL168018C (nl) 1982-02-16
FR2166093B1 (it) 1975-06-20
CA980217A (en) 1975-12-23
AU465883B2 (en) 1975-10-09
NL168018B (nl) 1981-09-16
NL7217660A (it) 1973-06-29
JPS4868857A (it) 1973-09-19
DE2263054C3 (de) 1985-08-01
FR2166093A1 (it) 1973-08-10

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