US3265421A - Automatic yarn-knotting and tensioning device - Google Patents

Automatic yarn-knotting and tensioning device Download PDF

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Publication number
US3265421A
US3265421A US353358A US35335864A US3265421A US 3265421 A US3265421 A US 3265421A US 353358 A US353358 A US 353358A US 35335864 A US35335864 A US 35335864A US 3265421 A US3265421 A US 3265421A
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Prior art keywords
knotting
yarn
tensioning
winding
counting
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US353358A
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English (en)
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Raasch Hans
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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

  • Counting devices have accordingly been provided in the past for winding machines which count the knotting failures per cop, per wound yarn length, per winding time or the like, and which prevent the start of a knotting operation when an adjustable limit of previous knotting operations is exceeded or signal the factthat the limiting amount has been exceeded or do both.
  • the inspection devices or counting devices operate by the actuation of a special feeler after the tying of the knot and the movement of the feeler toward the yarn. If both yarn ends are not properly knotted together, however, no resistance is offered to the feeler. The feeler can therefore be moved farther and beyond the normal location of a knotted yarn so that it actuates the counting device, for example, through an electrical contact.
  • An object of my invention accordingly is to provide a yarn-knotting device which dispenses with all additional feeling or sensing devices known until now so that the winding machine is markedly simplified and its susceptibility to breakdown is reduced.
  • Another object of my invention is to provide a yarnknotting device which carries out the inspection operation during the knotting operation so that the time necessary for the inspection operation is accordingly economized.
  • I provide a yarn-winding machine with an automatic knotting device and with an inspection device that inspects the firmness of the knotted yarn.
  • the knotting device has a tensioning member abutting against the properly knotted yarn, and a counting device which is actuatable by a releasing member cooperating with the tensioning member.
  • I provide one element of the knotting device with a releasing member which can actuate a counting device.
  • the releasing member cooperates with the tensioning member in such a Way that each knotting operation is counted.
  • the yarn breaks are simultaneously counted in the same way. It is, however, also possible to connect the releasing member with the tensioning member so that the counting device is actuated solely by a faulty knotting Operaton, while this tensioning member in a manner similar to that for the known feeler described above, can
  • the counting device actuatable by the release member when a knotting failure is detected, but also the winding operation of the winding station is cut off. Then if necessary the counting device which registers the knotting failures for discontinuing the winding operation of the winding station can also be connected with the releasing member.
  • the winding station is first switched on after the knot is tied, then the yarn is inspected and the winding station is again shut off if a knotting failure is detected.
  • the starting operation of the winding station does not take place until after it is established that a proper knot has been tied so that the surface of the take-up spool is not stressed by superfluous starting operations.
  • the knotting device After a yarn break, the knotting device attempts to tie the broken yarn ends once again with each other. If a proper knot is thereby tied, nothing else occurs. When a knotting failure, however, takes place, i.e. when the yarn ends are not tied properly to one another, the associated counting mechanism is actuated and is advanced one scale graduation or the like. A second knotting attempt then takes place immediately thereafter or following a specific interval. If the second knotting attempt is again unscuccessful, the counting mechanism is advanced another unit graduation. If the second knotting attempt is successful however, then the counting device is switched back to zero.
  • the number of knotting failures were, for example, limited to three, i.e. the winding station were to shut down after the third knotting failure, it could happen that immediately after the beginning of the winding operation two knotting failures might occur, yet a properly tied knot could be effected at the third knotting attempt. Then if further knotting failures should occur at any time during the unwind ing of this supply coil, the winding station would already be shut off. If, however, after each successful knotting attempt the counting mechanism is reset to zero, then in fact only the consecutive knotting failures are counted, without the amount of knotting failures occurring at one position of the supply coil having any effect thereon, as additional knotting failures often occur in the further course of the winding operation.
  • a knotting device such as is disclosed in US. Patents 2,981,559 and 3,110,511.
  • Two'coaxially mounted cam discs 6 and 7 are provided that perform a single full rotation clockwise during each knotting operation in the direction of the arrow 22 for actuating the knotter.
  • a follower arm 8 rests against the cam 6 and is rigidly joined with the gear segment 9 which is spring-biased in a clockwise direction.
  • the gear segment 9 is in meshing engagement with an angularly related spur gear 10 that is mounted on a hollow or tubular shaft 23 which carries a cup-shaped disc 11.
  • Two tie beaks 12 and 13 joined to driving pinions are actuated in a known manner by the cup disc 11 which is provided with peripheral teeth meshing with the driving pinions.
  • An adjustable set screw or follower pin 15 engages the surface of the cam 7 and is mounted in a bore formed in one arm of a bell crank lever 14 and biased away from the lever 14 by a spring 24.
  • a forked tensioning member or tappet extends through the hollow shaft 23 and is pivotally connected at one end to the upper end of the lever 14.
  • the lower end of the lever 14 carries an electric contact 16 cooperating with a fixed contact 17 provided at one side of an aperture formed in the housing of the knotting device.
  • a counting device 26 is serially connected with the contacts 16, 17 and a current source 25.
  • the set screw which engages the camming surface of the earn 7 acts through the spring 24 on the lever 14 and moves the tensioning member 5 in the direction of the arrow 5 while and after the knot is formed. If a proper knot is formed by the k-notter, then the bifurcated end of the tensioning member 5 can abut against the yarn ends 1 and 2 now knotted together, and the residual upward motion of the set screw 15 is then taken up by compression of the spring 24. At a knotting failure, however, the tensioning member 5 encounters no resistance from the yarn and can swing out to the location shown in phantom by the dot-and-dash lines so that both contacts 16 and 17 are mutually engaged or closed as the lever 14 is caused to turn counterclockwise.
  • the counting mechanism 26 is thereby energized and records an advance of one scale division or counter unit.
  • the knotting device proper then leaves the winding station and for the time being services other inactive winding :stations or winding machines in a manner described for example in Patents Nos. 3,033,478 and 3,078,054.
  • the knotting device returns each time to this winding station at which the knots are not properly produced, repeated knotting attempts are then carried out. If the knotting attempt is successful, i.e.
  • connection between the contacts 31, 32 to the circuit of the counting mechanism can be made with sliding contacts similar to the sliding contacts 27 and 28. If a second knotting attempt also fails, then the counting device is again advanced another counter unit. The knotting device then leaves the winding station once again to service the other stations and returns anew after a specific interval to carry out a third knotting attempt, and more if necessary. If a number of knotting attempts to which the counting device had previously been adjusted are failures, and this number has been cumulatively recorded by the counting device, the winding station is then shut oif in a manner known to the man of ordinary skill in the art by a device such as is shown for example in Patents Nos. 2,716,004 and 2,752,103 so that further knotting attempts are prevented.
  • a wiper engages the contact C which energizes and activates a solenoid R to shut ofl? the winding operation at the winding station.
  • Known mechanical or electrical counting mechanisms can be employed in the counting device and also mechanisms which operate by storing up heat, pressure, electricity, volume or the like.
  • My invention is not limited to the described use. It can also be employed for winding machines in which each of the winding stations has its own knotting device, as well as for winding machines that have winding stations and knotting devices that are movable with respect to one another.
  • means for knotting a pair of yarn ends including tensioning meansnorrnally tensioning the ends knotted thereby so as to test the firmness thereof, said tensioning means being movable to a predetermined location when the knotting is faulty, and counting means operatively connected to said tensioning means for recording a faulty knotting whenever said tensioning means is moved to said predetermined location.
  • means for knotting a pair of yarn ends including tensioning means normally tensioning the ends knotted thereby so as to test the firmness thereof, said tensioning means being movable to a predetermined location when the knotting is faulty, releasing means associated with said tensioning means and responsive to the movement of said tensioning means to said predetermined location, and counting means actuated by the response of said releasing means to said movement of said tensioning means for recording a faulty knotting whenever said ten-sioning means is moved to said predetermined location.
  • means for knotting a pair of yarn ends including tensioning means normally tensioning the ends knotted thereby so as to test the firmness thereof, said tensioning means being movable to a predetermined location when the knotting is faulty, a releasing member connected to said tensioning means and movable with said tensioning means, and counting means actuated only in response to a faulty knotting by the movement of said releasing member for recording the faulty knotting whenever said tensioning means is moved to said predetermined location.
  • a knotting device wherein said releasing means includes a pair of contacts movable into electrical engagement with each other by said tensioning means for energizing a circuit, said counting means being electrically connected in said circuit and capable of recording a faulty knotting whenever said circuit is energized.
  • a winding station for performing a yarn-winding operation
  • a knotting device located at said station comprising means for knotting a pair of yarn ends including tensioning means normally tensioning the ends knotted thereby so as to test the firmness thereof, said tensioning means being movable to a predetermined location when the knotting is faulty, and counting means operatively connected to said tensioning means for recording a faulty knotting whenever said tensioning means is moved to said predetermined location, said counting means being connected with said winding station for shutting off the yarn-winding operation after a pre-adjusted number of faulty knottings are recorded.
  • tensioning means movable into abutment with the knotted yarn ends for tensioning the same when properly knotted, said tensioning means being movable to a prede termined location when the knotting is faulty, counting means operatively connected to said tensioning means for cumulatively recording a series of faulty knottings when said tensioning means is repeatedly moved to said predetermined location, and reset means actuated by said tensioning means for resetting said counting means to a recording position prior to the cumulative recording of said series of faulty knottings when the yarn ends are properly knotted and said tensioning means is moved into abutment therewith.
  • tensioning means movable into abutment with the knotted yarn ends for tensioning the same when properly knotted, said tensioning means being movable to a predetermined located when the knotting is faulty, counting means operatively connected to said tensioning means for cumulatively recording a series of faulty knottings when said tensioning means is repeatedly moved to said predetermined location, first releasing means including a first circuit and a first pair of contacts in said circuit movable into electrical engagement with each other in response to the movement of said tensioning means to said predetermined location for energizing said first circuit, counting means electrically connected in said first circuit and capable of re cording said series of faulty knottings when said first circuit is repeatedly energized, and second releasing means including a second circuit and a second pair of contacts in said circuit movable into electrical engagement with each other in response to the movement of said tensioning means into abutment with the knotted yarn ends, when the ends are properly knotted, for energ

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  • Basic Packing Technique (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
US353358A 1963-03-21 1964-03-20 Automatic yarn-knotting and tensioning device Expired - Lifetime US3265421A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER34740A DE1276528B (de) 1963-03-21 1963-03-21 Spulmaschine mit selbsttaetiger Knotvorrichtung

Publications (1)

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US3265421A true US3265421A (en) 1966-08-09

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Application Number Title Priority Date Filing Date
US353358A Expired - Lifetime US3265421A (en) 1963-03-21 1964-03-20 Automatic yarn-knotting and tensioning device

Country Status (4)

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US (1) US3265421A (de)
CH (1) CH411650A (de)
DE (1) DE1276528B (de)
GB (1) GB1064097A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868133A (en) * 1973-06-18 1975-02-25 Palitex Project Co Gmbh Pneumatic yarn knotter mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834207A (en) * 1954-03-29 1958-05-13 Dow Chemical Co Gel counter
US2981559A (en) * 1958-07-03 1961-04-25 Reiners Walter Yarn knotter
US3063007A (en) * 1959-01-20 1962-11-06 Canadian Ind Fault detection in multifilament yarns
US3110511A (en) * 1960-05-18 1963-11-12 Reiners Walter Yarn-tying device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034079B (de) * 1950-05-22 1958-07-10 Reiners Walter Dr Ing Vorrichtung zur UEberwachung der Arbeitsleistung an selbsttaetigen Spulmaschinen
DE1181597B (de) * 1958-07-03 1964-11-12 Reiners Walter Dr Ing Verfahren und Vorrichtung zur Bildung eines Fischerknotens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2834207A (en) * 1954-03-29 1958-05-13 Dow Chemical Co Gel counter
US2981559A (en) * 1958-07-03 1961-04-25 Reiners Walter Yarn knotter
US3063007A (en) * 1959-01-20 1962-11-06 Canadian Ind Fault detection in multifilament yarns
US3110511A (en) * 1960-05-18 1963-11-12 Reiners Walter Yarn-tying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868133A (en) * 1973-06-18 1975-02-25 Palitex Project Co Gmbh Pneumatic yarn knotter mechanism

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Publication number Publication date
CH411650A (de) 1966-04-15
GB1064097A (en) 1967-04-05
DE1276528B (de) 1968-08-29

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