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US3335761A - Weft guiding apparatus - Google Patents

Weft guiding apparatus Download PDF

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Publication number
US3335761A
US3335761A US484363A US48436365A US3335761A US 3335761 A US3335761 A US 3335761A US 484363 A US484363 A US 484363A US 48436365 A US48436365 A US 48436365A US 3335761 A US3335761 A US 3335761A
Authority
US
United States
Prior art keywords
thread
weft
weft thread
slay
shuttle
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
US484363A
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English (en)
Inventor
Bartosek Vladimir
Janousek Vilem
Rotrekl Otto
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.)
Elitex Sdruzeni Podniku Textilniho Strojirenstvi
Elitex Zavody Textilniho
Original Assignee
Elitex Zavody Textilniho
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 Elitex Zavody Textilniho filed Critical Elitex Zavody Textilniho
Application granted granted Critical
Publication of US3335761A publication Critical patent/US3335761A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the present invention relates to a weft guiding apparatus, and more particularly to apparatus for guiding a weft thread drawn from a weft supply during a pick in such a manner that the weft thread does not slide on the fell of the web which is being woven.
  • a weft inserting means in the form of a gripper shuttle or needle holds the weft thread during the pick so that the weft thread is drawn from a stationary weft supply.
  • the weft supply is a thread package located outside of the warp shed and laterally of the slay on the stationary frame of the loom.
  • a thread guide means is used for feeding the weft thread from the thread supply to the weft inserting means, for example to the gripper shuttle so that the same grips the weft thread and pulls it off the weft supply during the pick, while the weft thread slides through the eye of the thread guide.
  • the thread guide may be mounted on the machine frame or on the slay, and performs the function of placing the weft thread in a position in which it can be gripped by the shuttle while the same is located outside of the warp shed If the thread guide is arranged on the slay, the weft thread can be attached to the gripper shuttle in any posi tion of the slay, however, this operation is usually carried out during the rearward motion of the slay from its front dead center position to the rear dead center position.
  • the disadvantage of this construction is thatthe thread guide increases the inertia of the slay, which is undesirable, particularly if a weft changing device for supplying weft threads of different colors has to be mounted on the slay.
  • the reciprocating movement of the slay must be controlled in such a manner that the same remains in the rear dead center position for a certain time necessary for the insertion of the weft thread into the gripper shuttle, or other weft inserting means.
  • apparatus of this type has the disadvantage that the thread guide means is located forwardly of the fell of the woven Web while placing the weft thread in the gripper shuttle, which is due to the fact that the gripper shuttle is located forwardly of the fell of the web when the slay is in its front position in which the reed beats the last Weft thread into the web. Consequently, when the gripper shuttle moves rearwardly with the slay during the pick, lines passing through the gripper shuttle and the thread guide cross the fell of the web, so that the weft thread is drawn by the shuttle over the selvedge warp threads in the region of the fell of the web.
  • weft thread If there is any irregularity in the weft thread, it may tear or break, and particularly if synthetic fibers such as nylon are used as weft thread, substantial heat develops due to the friction, resulting in scorching of the threads.
  • Another object of the invention is to place weft guide means for a weft thread during the pick in such a position that a weft thread guided by the thread guide does not frictionally engage the threads of the woven web.
  • Another object of the invention is to hold a thread guide in .a forward position while the same inserts a weft thread into a gripper shuttle, and to hold the thread guide in a rearward position while the shuttle draws a weft thread through the thread guide during the pick.
  • Another object of the invention is to prevent abrasion of a weft thread during its insertion into a warp shed.
  • Another object is to obtain a faster movement of a picked gripper shuttle drawing a weft thread from a weft supply by guiding the drawn off weft thread along a path spaced from the fell and the selvedge of the woven web so that frictional engagement between the Weft thread and the web is prevented.
  • the present invention relates to a weft guiding apparatus which is provided in a loom having a slay reciprocable between front and rear dead center positions, and weft inserting means, such as a gripper. shuttle or needle, mounted for movement across the slay between two end positions located outward of the warp shed of the web.
  • weft inserting means is in one of the end positions thereof when the slay is in the front dead center position.
  • One embodiment of the invention comprises thread supply means for supplying a weft thread, for example a thread package supported on the frame of the loom; thread guide means, preferably having an eye for guiding the weft thread, and having a first position located for- Wardly ofthe fell of the web for feeding and attaching the weft thread to the weft inserting means, or more particularly to the gripper of a gripper shuttle while the same is in one of said end positions and the slay is in the front,
  • the drive means control the thread guide means in such a manner that the weft thread is attached to the gripper shuttle while the slay is in the front position, while in the second position of the thread guide means, a plane through the eye of the thread guide and the gripper shuttle in any position during the pick, does not cross the fell of the fabric.
  • the drawn thread is not bent at the selvedge of the web in the region of the fell of the web, passes through the warp shed without frictional engagement with the web, and is not subject to abrasion.
  • FIG. 1 is a fragmentary side elevation illustrating an embodiment of the invention in a first operational position in which the slay is in its front position and a weft thread is fed to a gripper shuttle;
  • FIG. 2 is a side elevation corresponding to FIG. 1 but illustrating the apparatus in another operational position during the insertion of a weft thread into a warp shed;
  • FIG. 3 is a fragmentary schematic plan View illustrating apparatus according to the prior art in the operational position of FIG. 2;
  • FIG. 4 is a side elevation corresponding to FIG. 2 and illustrating the drive means for reciprocating the thread guide means
  • FIG. 5 is a fragmentary plan view illustrating the apparatus of the invention in the operational position of FIG. 4 during the insertion of a weft thread into a warp shed.
  • a slay 9 is angularly reciprocated in the usual manner between a front dead center position shown in FIG. 1, and a rear dead center position toward which the slay moves in the direction of the arrow S in FIG. 2.
  • the slay carries a reed 8 with reed elements passing between adjacent warp threads, so that during forward movement of the reed 8 from the position of FIG. 2 to the position of FIG. 1, the last picked weft 11 is beaten into the fell of the web 21 which is being woven.
  • the weft inserting means shown to be a gripper shuttle 10
  • picking means 22 When the weft inserting means, shown to be a gripper shuttle 10, is picked by picking means 22 while located in a shuttle box 23, it moves from one end position on one side of the warp shed through the same to the other side of the warp shed, two positions of the gripper shuttle being shown in FIGS. 3 and 4.
  • Picking means 22 and shuttle boxes 23 are mounted on the slay for reciprocating movement with the same, and are provided on both sides of the slay.
  • the gripper shuttle 10 in a shuttle box 23 is located in the region of the eye 2 of a weft guide 1 as shown in FIG. 1.
  • a weft thread 3 supplied from a cross wound package 5 on the stationary frame of the loom passes through eye 2 into the web 21 where it is located as the weft thread 12 which was inserted before the last weft thread 11.
  • the last weft thread 11 was picked from the other side of the loom and was supplied by another weft thread package 5 located on the other side of the loom and passing through a thread guide 1, not shown, on the other side of the loom.
  • FIG. 3 corresponds to the prior art, and it will be appreciated that considerable friction will develop between the weft thread 3 sliding on the threads of the web and more particularly at the juncture of the last weft thread 11 and the outermost warp threads in a bent and kinked position.
  • thread guide 1 is moved after insertion of the weft thread 3 into the gripper of the shuttle 10 from its first position shown in FIG. 1 to a second position shown in FIG. 5 in which the eye 2 of the thread guide 1 is located rearwardly of the last weft thread 11 and of the fell of the newly woven web. Consequently, when the shuttle is picked and travels in the direction S the weft thread portion 3a does not engage the fell of the fabric, or the selvedge of the web and is located along a straight line connecting eye 2 with the gripper of shuttle 10.
  • the weft thread portion 3a is also located in a plane passing through the gripper of the shuttle, eye 2 and thread supply package 5, and the eye 2 is advantageously slanted, as shown in FIG. 5, to guide the weft thread 3 which is drawn off the supply package 5 without substantially bending the Weft thread.
  • Eye 2 may also taper toward shuttle 10 as shown in FIG. 5.
  • a cam 31 is driven by a shaft 32 which rotates at half the number of revolutions of the main shaft of the loom.
  • Cam 31 is engaged by a cam follower roller 33 on a lever 19 which is turnable about a pivot 20 and is urged by a spring 24 toward cam 31 so that lever 19 is reciprocated.
  • Lever 19 has at its free end a slot 18 receiving a pin 17 on thread guide 1 which is guided in a guide sleeve 16 for rectilinear movement.
  • slay 9 with reed 8 move first rearward to the rear dead center position and then forward to the front dead center position to beat the last inserted weft into the fell of the fabric.
  • the last weft thread 11 was just beaten by reed 8 after having been drawn from a thread supply means 5 on the other side of the loom, not shown, by gripper shuttle 10 moving in a direction opposite to the direction of the arrow S
  • Shuttle 10 has grippers at opposite ends, so that a weft thread 3 from supply means 5 can be gripped by the free gripper of the shuttle when the same arrives in the region of the eye 2 of thread guide 1 in the position of FIG. 1. Since thread 3 passing through eye 2 is still connected with the weft thread 12 in the web, cutting mean 30 cuts off thread 3 after insertion into shuttle 10, so that the shuttle can be picked for movement in the direction of the arrow S as shown in FIG. 5.
  • thread supply means for supplying weft thread
  • thread guide means located between the weft thread supply means and the edge of the web and having a weft thread guide portion which guides said weft thread
  • said thread guide means having a first position in which said guide portion is located forwardly of the fell and in position for attaching the weft thread to said weft inserting means located in the associated one of said end positions while said slay means is in said front dead center position
  • drive means operating in timed relationship with said slay means for moving said thread guide means rearward to a second position in which said guide portion is located rearwardly of the fell so that during insertion into a shed the weft thread passing from said supply means through said guide portion to said weft inserting means is delivered rearward of and out of contact with said fell.
  • said drive means includes a driven rotary cam, wherein said reciprocating member is a cam follower cooperating with said cam and being reciprocated by the same during rotation thereof, and means connecting said thread guide means with said cam follower so that said thread guide means is reciprocated between said first and second positions.
  • said thread guide means is an elongated needle having said guide portion at one end thereof, said guide portion having a bore extending through said needle slanted to the longitudinal direction of the same so as to be substantially located in a plane extending between said thread supply means and the path of said weft inserting means.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US484363A 1964-09-02 1965-09-01 Weft guiding apparatus Expired - Lifetime US3335761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS489264 1964-09-02

Publications (1)

Publication Number Publication Date
US3335761A true US3335761A (en) 1967-08-15

Family

ID=5392667

Family Applications (1)

Application Number Title Priority Date Filing Date
US484363A Expired - Lifetime US3335761A (en) 1964-09-02 1965-09-01 Weft guiding apparatus

Country Status (7)

Country Link
US (1) US3335761A (de)
AT (1) AT258229B (de)
BE (1) BE668621A (de)
CH (1) CH435142A (de)
DE (1) DE1535400A1 (de)
GB (1) GB1084392A (de)
SE (1) SE301774B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4875507A (en) * 1986-12-30 1989-10-24 N.V. Michel Van De Wiele Process and apparatus for guiding the weft threads in weaving looms
WO2018041127A1 (zh) * 2016-08-30 2018-03-08 江苏友诚数控科技有限公司 喷气织机筘动纬剪机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3163184A (en) * 1961-02-10 1964-12-29 Cherpin Jean Victor Gripper shuttle
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092150A (en) * 1959-06-02 1963-06-04 Dewas Raymond Weaving method and loom
US3163184A (en) * 1961-02-10 1964-12-29 Cherpin Jean Victor Gripper shuttle
US3237656A (en) * 1962-06-26 1966-03-01 Dewas Raymond Weaving loom comprising a device for the guiding and supervision of the weft thread

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4875507A (en) * 1986-12-30 1989-10-24 N.V. Michel Van De Wiele Process and apparatus for guiding the weft threads in weaving looms
WO2018041127A1 (zh) * 2016-08-30 2018-03-08 江苏友诚数控科技有限公司 喷气织机筘动纬剪机构

Also Published As

Publication number Publication date
AT258229B (de) 1967-11-10
DE1535400A1 (de) 1970-09-24
BE668621A (de) 1965-12-06
SE301774B (de) 1968-06-17
GB1084392A (en) 1967-09-20
CH435142A (de) 1967-04-30

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