US3410590A - Device for tying the ends of yarns - Google Patents

Device for tying the ends of yarns Download PDF

Info

Publication number
US3410590A
US3410590A US629775A US62977567A US3410590A US 3410590 A US3410590 A US 3410590A US 629775 A US629775 A US 629775A US 62977567 A US62977567 A US 62977567A US 3410590 A US3410590 A US 3410590A
Authority
US
United States
Prior art keywords
mandrel
gripper
yarn
tying
yarns
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
US629775A
Other languages
English (en)
Inventor
Altenweger Alois
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.)
Zellweger Uster AG
Original Assignee
Zellweger Uster 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 Zellweger Uster AG filed Critical Zellweger Uster AG
Application granted granted Critical
Publication of US3410590A publication Critical patent/US3410590A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/04—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by knotting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • ABSTRACT OF THE DISCLOSURE A device for tying the ends of yarns having a stationary mandrel and a yarn gripper positioned adjacent the end of said mandrel and mounted for rotation thereabout wherein a cam wheel rotated relative to the gripper provides a cam track within which a follower connected to said gripper rides for effecting movement of said gripper toward said mandrel.
  • the mandrel and the clamps holding the ends of the threads must rotate relative to each other and this may be accomplished either by the rotation of the mandrel sleeve itself, which is provided with a hook operatively connected to the sleeve, or by the rotation of the clamp holding the thread ends above the stationary sleeve.
  • the length of thread required is provided in each case by permitting the thread ends fictionally engaged by the thread clamp to slide therein.
  • the thread clamp is so designed that it is held in closed position, for example, by means of a spring and may be opened either by the action of the thread itself or it may be so designed as to be held in closed position by the action of a spring and opened by suitable means of the tying machine.
  • the latter design and arrangement of the thread clamp has usually served heretofore only to enable the threads to be inserted more easily since the threads, in each instance, after the completion of the knot-tying step are caused to slide free of the thread clamp.
  • the loops required for a given knot are formed by means of a stationary mandrel in combination with a yarn gripper which both rotates around the mandrel and makes an axial movement with respect thereto. Since the ends of the yarn have to be wound on the mandrel during loop formation, they have to be pulled through the yarn gripper, which follows a circular path with the mandrel at the center.
  • sensitive yarns are damaged when they are pulled through the gripper; for example, the necessity to pull yarns through the gripper is a particular disadvantage to knot and loop yarns because they can be stretched, which adversely affects the function of the tying components.
  • Another disadvantage of pulling the yarns through the gripper is that the gripper itself is subject to considerable wear at the gripping point.
  • the yarn gripper during its movements around the axis of the mandrel and parallel thereto, as required for loop formation, approaches the said axis in such a way that, at each stage of the loop formation, that part of the mandrel onto which the yarns are wound substantially forms the evolute of the path followed by the yarn gripper.
  • the ends of the yarn no longer are pulled through the yarn gripper, since the feeding of yarn to the mandrel during the formation of the knot is provided during this operation by progressive movement of the yarn gripper in the direction of the mandrel.
  • the problem of wear to the gripper at the gripping point thereof is also substantially eliminated.
  • an object of the present invention to provide a device for tying the ends of yarns which altogether eliminates, or otherwise substantially avoids, all of the aforementioned disadvantages inherent in known devices of a similar nature.
  • a device for tying the ends of yarns is accommodated in a housing 1 of any general configuration. It is driven by a motor (not shown) which rotates a main shaft 5 by way of an intermediate shaft 2 and a pair of spur wheels 3 and 4. The main shaft 5 makes one revolution for each tying cycle.
  • a mandrel 6 is fixed to the housing 1 and is of conventional design incorporating conventional threading and ejecting needs (not shown).
  • the yarn ends to be tied together are taken up, in the known manner, by a rotatable yarn gripper 7 and guided around the mandrel 6 in order to form the loops required for tying a knot.
  • the yarn gripper 7 is kept closed under the pressure of a compression spring 8 and is pivotally mounted on a pin 9, which in turn is anchored in a collet 10.
  • the collet 10 is slotted and connected firmly by clamping to a sleeve 12 by means of set screws 11.
  • a rearward extension 13 of the yarn gripper 7 has a shoulder 14 which engages around a roller lever 15 which is also rotatably mounted on the pin 9.
  • a spring bolt 16 fixed to the roller lever 15 projects through the shoulder 14, and in conjunction with a compression spring 17, presses it against the roller lever 15 so that the yarn gripper 7 moves into the position illustrated.
  • the end of the roller lever 15 carries a roller 19 which travels in a cam track around a cam wheel 20.
  • the cam wheel 20 is rotatably mounted on the sleeve 12 and has a toothed rim so that it can be rotated by a pinion 21 mounted on the intermediate shaft 2.
  • the sleeve 12 also has a spur wheel 22 which is driven by a pinion 23 mounted on a shaft 24, which is rotated by a pinion 25 meshing with the gearwheel 4.
  • the sleeve 12 is-provided with a groove 26 in which a fork 27 is engaged.
  • the fork 27 is fixed to a bolt 28 which is resiliently pressed against the cam disc 30 under the action of a compression spring 29.
  • the cam disc 30 is mounted on the main shaft 5, and, during each tying cycle, imparts an axial movement to the sleeve 12 and hence to the yarn gripper 7 by way of the bolt 28 and the fork 27.
  • the number of teeth in each of the gearwheels required to produce a conventional roll-type knot, should be fixed in such a way that, for each revolution of the main shaft 5, the sleeve 12, and hence the yarn gripper 7, complete three revolutions about the axis of the stationary mandrel 6 while the cam wheel completes only two. Accordingly, each time the main shaft 5 completes a revolution, the yarn gripper 7 is displaced by one revolution about the cam disc 20.
  • the device operates as follows:
  • the yarn gripper 7 For each revolution of the main shaft, the yarn gripper 7 completes three full revolutions around the mandrel 6, during which time the loops are formed in known manner on the mandrel 6.
  • the yarn gripper 7 has to be displaced parallel to the axis of the mandrel 6, in known manner, which is effected by the cam disc in the manner referred to above.
  • the yarn gripper 7 is displaced in accordance with the invention towards the axis of the mandrel 6 by the cam Wheel 20.
  • the cam wheel 20 is provided with a cam track which is designed in such a way that, at each stage of loop formation, the yarn gripper is moved by the roller 19 riding in the cam track so that part of the mandrel onto which the yarns are wound forms the evolute of the path followed by the yarn gripper.
  • the cam wheel designed in this way the yarns do not have to be pulled through the yarn gripper 7, since the radial movement of the gripper provides the required yarn for the loops. Accordingly, the pressure exerted by the spring 8 can be adjusted to such a level that the ends of the yarn are surely but safely held in the gripper 7.
  • the yarn gripper may not move sufiiciently close to the mandrel 6 during loop formation.
  • the yarn gripper 7 is pivotally mounted on roller lever 15 so that it can rotate with its rearward extension 13 relative to the roller lever 15 against the pressure of the spring 17 in exact dependence upon the length of yarn wound onto the mandrel 6.
  • a device for tying the ends of yarns including a stationary mandrel, a sleeve mounted for rotation on said mandrel, a yarn gripper positioned adjacent the end of said mandrel and mounted on said sleeve for rotation therewith about said mandrel wherein the improvement comprises means for controlling the position of said gripper with respect to said mandrel during its movement therearound to approach said mandrel so that the part of the mandrel onto which the yarns are wound substantially forms the evolute of the path followed by the yarn gripper.
  • said means includes a cam wheel having a cam track mounted for rotation with respect to said sleeve and said mandrel, and a follower member positioned in said cam track and connected to said yarn gripper for positioning said gripper in accordance with the shape of said cam track, and drive means for rotating said yarn gripper at a speed which is an integral multiple of the rotational speed of said cam wheel.
  • a device for tying the ends of yarns including a stationary mandrel, a sleeve mounted for rotation on said mandrel, a yarn gripper positioned adjacent the end of said mandrel and mounted on said sleeve for rotation therewith about said mandrel, a cam wheel having a cam track mounted for rotation on said sleeve, a follower member positioned in said cam track and connected to said yarn gripper for effecting movement of said gripper toward said mandrel in accordance with the shape of said cam track, and means for driving said sleeve and said cam wheel in rotation.
  • said drive means includes gear means rotating said cam wheel with respect to said sleeve to the extent that said sleeve effects one complete revolution with respect to said sleeve during a complete tying operation.

Landscapes

  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
US629775A 1966-04-15 1967-04-10 Device for tying the ends of yarns Expired - Lifetime US3410590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH557366A CH435154A (de) 1966-04-15 1966-04-15 Vorrichtung zum Verknüpfen von Fadenenden

Publications (1)

Publication Number Publication Date
US3410590A true US3410590A (en) 1968-11-12

Family

ID=4295835

Family Applications (1)

Application Number Title Priority Date Filing Date
US629775A Expired - Lifetime US3410590A (en) 1966-04-15 1967-04-10 Device for tying the ends of yarns

Country Status (6)

Country Link
US (1) US3410590A (da)
CH (1) CH435154A (da)
DE (1) DE1535966B1 (da)
DK (1) DK133165C (da)
FR (1) FR1512749A (da)
GB (1) GB1155151A (da)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US238327A (en) * 1881-03-01 Grain-binder
US1099128A (en) * 1913-10-16 1914-06-02 Max Poege Jr Knotting appliance.
US2879095A (en) * 1957-04-15 1959-03-24 Zellweger Uster Ag Thread knot and method for making same
US2977144A (en) * 1957-07-06 1961-03-28 Zellweger Uster Ag Apparatus for tying elastic threads

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH340797A (de) * 1956-04-04 1959-08-31 Zellweger Uster Ag Verfahren zum Verknüpfen von mindestens zwei Fäden

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US238327A (en) * 1881-03-01 Grain-binder
US1099128A (en) * 1913-10-16 1914-06-02 Max Poege Jr Knotting appliance.
US2879095A (en) * 1957-04-15 1959-03-24 Zellweger Uster Ag Thread knot and method for making same
US2977144A (en) * 1957-07-06 1961-03-28 Zellweger Uster Ag Apparatus for tying elastic threads

Also Published As

Publication number Publication date
DK133165C (da) 1976-09-06
FR1512749A (fr) 1968-02-09
DE1535966B1 (de) 1970-06-25
CH435154A (de) 1967-04-30
GB1155151A (en) 1969-06-18
DK133165B (da) 1976-03-29

Similar Documents

Publication Publication Date Title
US3438194A (en) Process for the manufacture of a composite yarn which is provided with spaced slubs
US2879095A (en) Thread knot and method for making same
US3050019A (en) Method and apparatus for binding electric conductors and windings
US3410590A (en) Device for tying the ends of yarns
US2918777A (en) Hose making apparatus
US2855749A (en) Yarn tensioning
US3348866A (en) Apparatus for applying tampon removal cords
JPS6354820B2 (da)
US2803939A (en) Apparatus for twisting and winding
US2977144A (en) Apparatus for tying elastic threads
US3110511A (en) Yarn-tying device
CN113844951A (zh) 一种纺织用纺织机储纱装置
US2522582A (en) Needle driving apparatus for sewing machines
US2981559A (en) Yarn knotter
US3117738A (en) Device for fixing the thread ends on yarn coils
ES419138A1 (es) Anudador automatico para maquinas de retorcer o de bobinar.
US3309124A (en) Method and device for joining two opposingly directed yarn ends by a weaver's knot
US2009491A (en) Machine for laying a knot
US4002303A (en) Device for securing the winding ends of electrical coils on terminal pins
US2962235A (en) Toroidal winding machine
US3470922A (en) Unwinding device for filling furnishing mechanism
US2607543A (en) Pirn winding machine
US2398865A (en) Wire stranding machine
US3138396A (en) Device in a warp tying machine
US4568116A (en) Apparatus for producing a yarn-tying knot