US3788360A - Weft needle head of shuttleless loom - Google Patents

Weft needle head of shuttleless loom Download PDF

Info

Publication number
US3788360A
US3788360A US00240077A US3788360DA US3788360A US 3788360 A US3788360 A US 3788360A US 00240077 A US00240077 A US 00240077A US 3788360D A US3788360D A US 3788360DA US 3788360 A US3788360 A US 3788360A
Authority
US
United States
Prior art keywords
needle head
edge
wall
notch
head
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
US00240077A
Other languages
English (en)
Inventor
M Guallo
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.)
ATELIERS DIEDERICKS
Original Assignee
ATELIERS DIEDERICKS
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 ATELIERS DIEDERICKS filed Critical ATELIERS DIEDERICKS
Application granted granted Critical
Publication of US3788360A publication Critical patent/US3788360A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • D03D47/12—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

  • ABSTRACT This head of weft-yarn introducing needle for a shuttleless loom, which is adapted to introduce the yarn into the shed by developing a yarn loop having one end retained and the other end released, comprises a parallelipipedic tubular body of substantially rectangular cross-sectional configuration with horizontal walls formed with notches these notches have their bottom lined preferably with a ceramic material with their two pointed ends slightly recessed in relation to the notch bottom inlets on the feed side, the horizontal wall of the head adjacent the free end of the yarn loop is skew to the direction of travel and the wall portion bounded by the edge of said notch and the rear edge form together an upswept curved tongue terminating at a certain distance from the contiguous vertical wall.
  • the heads of introduction needles of the abovedescribed type are objectionable in that they are sometimes the cause of weft yarn breakage for, after the transfer of the yarn loop from one needle to the other needle the end of the free weft yarn section which is positioned between the introduction needle head and the feed and travels at twice the speed of this needle head and in the opposite direction, wriggles at random and may at least partially penetrate in the form of a small loop into the aforesaid introduction needle head, on the open feed side thereof.
  • the free yarn end must slip over the rear edge, thus increasing considerably the resistance to the normal movement and therefore the tractive effort exerted on the weft yarn, which may even exceed permissible limits.
  • the yarn may wear these edges.
  • the edge, on the feed side, of the wall of the head of the introduction needle disposed on the side of the free length of weft yarn is skew in relation to the direction of travel, and the portion of this wall which is bounded by the edge of the notch and said edge on the feed side constitutes a tongue terminating at a certain spacing from the contiguous vertical wall, thus leaving between this vertical wall and said tongue a release gap for the weft yarn.
  • the vertical walls of this needle head terminate in the form of points converging in the direction of the introduction of the weft yarn, in a manner known per se, and the tongue end is directed towards the contiguous vertical wall, its end being located ahead and above the longitudinal edge, its other edge on the notch side being co-extensive with the point of said vertical wall.
  • each notch bottom is provided with a hardened rounded bead consisting advantageously of a crescent-shaped ceramic lining having an outer contour smaller than that of the notch itself, said lining being fitted into said notch in such a manner that its two pointed ends are slightly recessed with respect to the inlet of the notch bottom to avoid any risk of catching the yarn.
  • FIG. 1 is a side elevational view of the needle head in a position prior to transfer of the yarn
  • FIG. 3 is a view similar to FIG. I but showing the free end of the weft yarn loop as it clears the release gap;
  • FIG. 4 is a view similar to FIG. 2 but with the weft yarn loop in the position of FIG. 3;
  • FIG. 5 is a front elevational view of the needle head
  • the reference numeral 1 designates the needle body or head-carrier to which the yarn introducing head is secured, for example, by means of rivets 11.
  • the top wall of the needle head is designated by the reference numeral 2, and, numeral 3 is the bottom wall, numerals 4, 5 being the two vertical or side walls terminating each, on the introduction side, with a pointed portion as shown at 40 and 5a, respectively.
  • This pointed portion 5a is slightly off-set to constitute an outflaring portion adapted to facilitate the penetration of the hook element of the traction needle.
  • the bottom wall 3 is cut obliquely, the skew edge 3a extending from the vertical wall 4 to which this bottom wall is connected and said skew edge 3a terminates beyond the other vertical wall 5 to which said bottom wall is not connected.
  • the reference numeral 30 designating the skew edge extending from the vertical wall 4 and directed in opposition to said edge 3a in relation to the direction of travel of the needle.
  • This edge 30 extends angularly with respect to another intersecting skew edge 3d having the same direction of inclination as said edge 3a.
  • This other edge 3d forms with edge 3c a projection constituting somewhat the extension of point 40, and, with another skew edge 3e less inclined than the first one in relation to the direction of travel, a notch 12 in which the weft yarn inserted vertically during the feed is introduced at the beginning of each pick positioning as shown in FIG. 1.
  • the bottom wall portion bounded by the edge 3a on the feed side and by the edge 32 of the notch forms a tongue whose tip 3b is upswept and terminates slightly above and ahead of the edge b of vertical wall 5, thus leaving a free gap 6.
  • the upper wall 2, as seen in the drawing, is connected to vertical walls 4 and 5 and is formed with a notch aligned with the notch 12 in the bottom wall to allow passage of the weft thread.
  • the edges of the notch in the upper wall are shown with reference numerals 2c, 2d in FIGS. 2 and 4.
  • the upper and lower walls are provided with crescent-shaped linings which are mounted at the bottom of the notches and whose external countour is shorter than the notch bottom, these linings being so fitted that their points 10a are somewhat recessed with respect to the edges of the notch bottoms.
  • these linings consist of ceramic material and are properly rounded to resist wear and reduce frictional contacts.
  • the reference numeral 8 designates the free end of the weft loop adapted to be pulled in the direction of the arrow 7 by the hook element of the other needle (not shown), 8a designating the end of the free yarn section extending behind the introduction needle head.
  • the needle head travels in the direction of the arrow 13.
  • a needle head for introducing weft thread into shuttleless looms in which the weft thread is introduced into a shed by developing a loop having one end retained and the other end released, said needle head comprising a tubular parallelepiped body of substantially rectangular cross-section with spaced vertical walls, and upper and lower horizontal walls each having a notch bounded by two inclined edges, the weft thread being adapted to slide in said notches before being transferred to a traction needle head, said lower wall having an edge inclined at an angle with respect to the direction of movement of the head, the latter said edge joining with one edge of the notch formed in the lower wall by a projecting part constituting a tongue which is spaced from the contiguous vertical wall of the needle head to form a gap with this wall for passage of the weft thread.
  • each vertical wall includes a V-shaped forward terminal portion which narrows in the direction of introduction of the head into the shed, said tongue including a tip portion which is located above the lower longitudinal edge of the contiguous vertical wall.
  • a needle head as claimed in claim 1 comprising crescent-shaped ceramic linings mounted on each horizontal wall at each notch therein, said linings having a smaller external contour than that of the respective notches, said linings being fitted into the bottom of said notches and having two pointed ends which are slightly recessed in relation to inlets of the notch bottoms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Supports For Plants (AREA)
US00240077A 1971-04-05 1972-03-31 Weft needle head of shuttleless loom Expired - Lifetime US3788360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7112626A FR2132560B1 (it) 1971-04-05 1971-04-05

Publications (1)

Publication Number Publication Date
US3788360A true US3788360A (en) 1974-01-29

Family

ID=9075044

Family Applications (1)

Application Number Title Priority Date Filing Date
US00240077A Expired - Lifetime US3788360A (en) 1971-04-05 1972-03-31 Weft needle head of shuttleless loom

Country Status (13)

Country Link
US (1) US3788360A (it)
JP (1) JPS52157B1 (it)
BE (1) BE780929A (it)
CA (1) CA951997A (it)
CH (1) CH544169A (it)
CS (1) CS182767B2 (it)
DD (1) DD96519A5 (it)
DE (1) DE2214813C3 (it)
ES (1) ES401214A1 (it)
FR (1) FR2132560B1 (it)
GB (1) GB1354654A (it)
IT (1) IT950328B (it)
SU (1) SU436503A3 (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030116218A1 (en) * 2000-03-06 2003-06-26 Nandan Khokar Method and means for textile manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1011480A3 (nl) * 1997-10-03 1999-10-05 Picanol Nv Gevergrijper voor een grijperweefmachine.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3081796A (en) * 1961-04-20 1963-03-19 Draper Corp Filling carrier for shuttleless looms
US3299910A (en) * 1964-10-19 1967-01-24 Draper Corp Filling inserting carrier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2247342A (en) * 1940-07-15 1941-06-24 Crompton & Knowles Loom Works Method of forming axminster loom needles
US2928427A (en) * 1959-01-08 1960-03-15 Draper Corp Filling carrier for shuttleless looms
US3081797A (en) * 1961-04-28 1963-03-19 Draper Corp Filling carriers for shuttleless looms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3081796A (en) * 1961-04-20 1963-03-19 Draper Corp Filling carrier for shuttleless looms
US3299910A (en) * 1964-10-19 1967-01-24 Draper Corp Filling inserting carrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030116218A1 (en) * 2000-03-06 2003-06-26 Nandan Khokar Method and means for textile manufacture
US6889720B2 (en) * 2000-03-06 2005-05-10 Biteam Ab Method and means for textile manufacture

Also Published As

Publication number Publication date
FR2132560B1 (it) 1973-11-23
CH544169A (fr) 1973-11-15
ES401214A1 (es) 1975-02-16
JPS52157B1 (it) 1977-01-05
DD96519A5 (it) 1973-03-20
DE2214813B2 (de) 1974-06-06
BE780929A (fr) 1972-07-17
DE2214813A1 (de) 1972-10-19
CA951997A (en) 1974-07-30
IT950328B (it) 1973-06-20
CS182767B2 (en) 1978-05-31
DE2214813C3 (de) 1975-01-16
FR2132560A1 (it) 1972-11-24
SU436503A3 (ru) 1974-07-15
GB1354654A (en) 1974-06-05

Similar Documents

Publication Publication Date Title
US3847188A (en) Woven tape provided with a list having protruding loops
GB1603572A (en) Belting with tubular edge portions
JPS63165555A (ja) 織機の杼口内における横糸支持グリッパの運動案内装置
US3788360A (en) Weft needle head of shuttleless loom
US3050088A (en) Weft tensioning and inserting device for gripper shuttle looms
US2567993A (en) Weft inserting device
US2928427A (en) Filling carrier for shuttleless looms
US3874420A (en) Weft inserting carrier
US2705508A (en) Filling carrier for shuttleless looms
US3779288A (en) Weft carrier guide
US3369572A (en) Selvage stabilizer for looms
US3014503A (en) Filling inserting carrier
US3299910A (en) Filling inserting carrier
US3776281A (en) Weft carrier for shuttleless looms
US3665976A (en) Suction apparatus on a textile machine
US3298400A (en) Filling carrier for shuttleless looms
US3119416A (en) Filling carriers for shuttleless looms
US3034539A (en) Filling carrier for shuttleless looms
US3344812A (en) Looms with stationary weft supply
US1944830A (en) Loom for weaving without a shuttle
US3116761A (en) Filling carrier for shuttleless looms
US2324564A (en) Nose board for axminster looms
US4147187A (en) Shuttle
US3335761A (en) Weft guiding apparatus
US2813548A (en) Weft-inserting devices for weaving looms