US3838874A - Automatic thread-knotting device - Google Patents

Automatic thread-knotting device Download PDF

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Publication number
US3838874A
US3838874A US00376462A US37646273A US3838874A US 3838874 A US3838874 A US 3838874A US 00376462 A US00376462 A US 00376462A US 37646273 A US37646273 A US 37646273A US 3838874 A US3838874 A US 3838874A
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United States
Prior art keywords
thread
threads
knot
knotting
scissor
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Expired - Lifetime
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US00376462A
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English (en)
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P Messa
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Individual
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Individual
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    • 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

  • the present invention is related to automatic threadknotting devices, particularly those employed in the production of the so-called Fisherman Knot, wherein scissor-pincer knotting means, thread-spreading levers and at least one thread-extracting frontal lever are generally utilized.
  • thread-knotting devices wherein, besides the thread-tension levers, there is provided a frontal lever which is vertically displaceable and which engages and displaces the threads after knotting, so as to impart thereon a vertical traction action for tightening the knot while the severed extremities of the threads are still retained by the scissor-pincer means.
  • the device of the invention is characterized in that, concurrently with the known threadspreading and frontal levers, it is provided with conically shaped-ending member mounted on the support of the thread-blocking means so as to act as a threadspreader during the vertical displacement of the knotted threads and so as to determine an auxiliary tractioh force on the threads to completely tighten the knot before it is fully removed by the scissor-pincer means.
  • FIG. 1 is a frontal elevational view of the assembled knotting device, showing furthermore the extremities of the threads during the knotting operation;
  • FIG. 2 shows in detail the operation of the assembled device for tightening the knots
  • FIG. 3 is a sectional view taken along the line indicated by arrows A-A in FIG. 1;
  • FIGS. 4 and 5 are schematic illustrations of two successive phases of the tightening of a knot.
  • the device of the invention comprises (coordinated and actuated in accordance with known techniques) scissorpincers l for the knotting operation, thread-spreading levers 2 and two frontal levers 3 opposed to each other, vertically displaceable and each having a horizontal arm 4 for engaging the knotted threads 5 and for the displacement thereof and the removal of the formed knot from the device.
  • the device of the invention comprises a member 6 having a conicallyshaped extremity and being mounted on a support 7, which support bears the controlled blocking means for the threads (operative) during the knotting operation.
  • Member 6 is so mounted as to result vertically positioned in the space existing between the scissor-pincer means 1 and the horizontal arms 4 of the two frontal levers 3.
  • Member 6, furthermore, has, on its lower part, two V-shaped inclined surfaces 8, diverging from each other in an upward direction and such as to wedge themselves between the threads knotted by the scissorpincer means.
  • member 6 is mounted on support 7 in coordination with the threadblocking element 9 and is provided with an intermediate oblong slot 10 so as to be height-regulated depend ing on the knotting operation and cooperating with a second similar member 11 for the purpose of obtaining a perfect closing of the knot without in the least damaging the thread, regardless of its diameter, its composition or its resistance to traction.
  • the knotting operation is effected in accordance with well known techniques and it is, therefore, unnecessary to describe it.
  • the vertical levers 3 are displaced upwardly so that their horizontal arms 4, acting on the threads 5, displace the threads upwardly. Due to this forced upward displacement, the threads come to rest against the inclined surfaces 8 of member 6 and are forced to spread and, consequently, to be subjected to additional traction in opposite direction, which then results in a further tightening of the knot for a complete closing thereof.
  • the inclined surfaces 8 of member 6, in essence, exert a horizontal component force of the upwardly displacing force caused by the vertical levers upon the threads. This horizontal component force determines the necessary auxiliary traction force on threads 5 for a complete tightening of the knot.
  • member 6 exercises the function of spreading the knotted threads to effect their traction in opposite directions, just like during a manual knotting operation, and to obtain a knot which is considerable more reliable and less prone to become untied.
  • the closing of the knot takes place in two successive phases of the operation: in the first phase, the vertical levers 3, in cooperation with the thread-spreading levers 2, remove from the scissor-pincer means 1 the individual knots N-N' forming the Fishermans Knot and begin to tighten them as illustrated in FIG. 4; in the second phase, the vertical levers 3 move the threads of the knots N-N onto the inclined surfaces 8 of member 6 so that the threads are subjected to oppositely-applied traction forces (F,F) with the resultant approachment and tightening of the knots N-N' as illustrated in FIG.
  • F,F oppositely-applied traction forces
  • an automatic thread-knotting device for making Fisherman s Knots and comprising thread-knotting scissor-pincer means, thread-spreading levers, at least one frontal, vertically-displaceable thread-extracting lever and thread-blocking means, the improvement which comprises a member having a conically-shaped extremity, a support on which said member is mounted,

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  • Basic Packing Technique (AREA)
  • Binders And Loading Units For Sheaves (AREA)
US00376462A 1972-07-24 1973-07-05 Automatic thread-knotting device Expired - Lifetime US3838874A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5187/72A IT962531B (it) 1972-07-24 1972-07-24 Annodatore automatico di filato perfezionato

Publications (1)

Publication Number Publication Date
US3838874A true US3838874A (en) 1974-10-01

Family

ID=11119034

Family Applications (1)

Application Number Title Priority Date Filing Date
US00376462A Expired - Lifetime US3838874A (en) 1972-07-24 1973-07-05 Automatic thread-knotting device

Country Status (5)

Country Link
US (1) US3838874A (it)
JP (1) JPS5069338A (it)
DE (1) DE2336285A1 (it)
GB (1) GB1429378A (it)
IT (1) IT962531B (it)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105228A (en) * 1976-11-03 1978-08-08 Mesdan S.P.A Automatic knot-forming machine for the formation of the fisherman's knot

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1103338B (it) * 1978-07-07 1985-10-14 Mesdan Spa Annodatore automatico di filati perfezionato particolarmente per la formazione del modo cosiddetto da tessitore
RU2179604C1 (ru) * 2001-05-21 2002-02-20 Дальневосточный государственный технический университет Узел "бест" с незатягивающейся рабочей петлей

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865665A (en) * 1956-01-13 1958-12-23 Messa Daniele Knotting device
US3166346A (en) * 1962-05-12 1965-01-19 Wildt Mellor Bromley Ltd Knotter for fisherman's knots in the textile industry
US3298726A (en) * 1965-02-25 1967-01-17 Leesona Corp Knotter
US3360289A (en) * 1964-08-19 1967-12-26 Wildt Mellor Bromley Ltd Knotters
US3734285A (en) * 1971-03-25 1973-05-22 P Messa Attachment for yarn apparatus for automatically forming a fisherman knot or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865665A (en) * 1956-01-13 1958-12-23 Messa Daniele Knotting device
US3166346A (en) * 1962-05-12 1965-01-19 Wildt Mellor Bromley Ltd Knotter for fisherman's knots in the textile industry
US3360289A (en) * 1964-08-19 1967-12-26 Wildt Mellor Bromley Ltd Knotters
US3298726A (en) * 1965-02-25 1967-01-17 Leesona Corp Knotter
US3734285A (en) * 1971-03-25 1973-05-22 P Messa Attachment for yarn apparatus for automatically forming a fisherman knot or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105228A (en) * 1976-11-03 1978-08-08 Mesdan S.P.A Automatic knot-forming machine for the formation of the fisherman's knot

Also Published As

Publication number Publication date
JPS5069338A (it) 1975-06-10
IT962531B (it) 1973-12-31
GB1429378A (en) 1976-03-24
DE2336285A1 (de) 1974-02-14

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