US3642218A - Unwinding device for filamentary material - Google Patents

Unwinding device for filamentary material Download PDF

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Publication number
US3642218A
US3642218A US850539A US3642218DA US3642218A US 3642218 A US3642218 A US 3642218A US 850539 A US850539 A US 850539A US 3642218D A US3642218D A US 3642218DA US 3642218 A US3642218 A US 3642218A
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United States
Prior art keywords
coil
filamentary material
thread
fullness
speed
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
US850539A
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English (en)
Inventor
Stefan Furst
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Individual
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Individual
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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
    • B65H49/00—Unwinding or paying-out filamentary material; Supporting, storing or transporting packages from which filamentary material is to be withdrawn or paid-out
    • B65H49/02—Methods or apparatus in which packages do not rotate
    • B65H49/04—Package-supporting devices
    • B65H49/10—Package-supporting devices for one operative package and one or more reserve packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/30—Devices controlling the forwarding speed to synchronise with supply, treatment, or take-up apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/082—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle responsive to a predetermined size or diameter of the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/14—Diameter, e.g. of roll or package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2513/00—Dynamic entities; Timing aspects
    • B65H2513/10—Speed
    • 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 Unwinding device for filamentary material includes means for determining the extent of fullness of the thread winding on a bobbin being unwound, and means for automatically controlling, in accordance with the extent of fullness of the thread winding on the bobbin, the speed at which the thread is being withdra nfrqm h b b n- 3 Claims, 3 Drawing Figures PATENTEDFEB 15 I972 SHEET 2 [IF 2 UNWINDING DEVICE FOR FILAMENTARY MATERIAL My invention relates to unwinding device for filamentary material.
  • Such unwinding devices are employed, for example in apparatus wherein a thread is unwound from a supply coil, such as a spinning cop, and wound onto a takeup coil such as a bobbin or cheese, or in machines wherein a thread that is being unwound is to be treated or processed as, for example, in the case of filling or feeding a weft in a Raschel knitting machine.
  • a supply coil such as a spinning cop
  • takeup coil such as a bobbin or cheese
  • balloon breaker which disrupts the thread ballooning action that occurs when a thread is unwound vertically from a coil and thereby reduces the tension of the unwinding thread.
  • unwinding device for filamentary material comprising means for determining the extent of fullness of the thread winding on a bobbin being unwound and means for automatically controlling, in accordance with the extent of fullness of the thread winding on the bobbin, the speed at which the thread is being withdrawn from the bobbin.
  • a marked simplification is effected according to my invention by providing means for automatically reducing the speed at which the filamentary material or thread is being unwound whenever the extent of fullness of the thread winding on the coil falls short of a predetermined value so that the unwinding device virtually operates at two speeds, namely a high speed, which is considerably higher than the speed at which the heretofore known conventional unwinding devices of this general type have been operated, and a lower speed to which it is automatically adjusted when the extent of fullness of the thread winding on the coil falls short of the aforementioned predetermined value, that lower speed corresponding actually to the conventional speed of the heretofore known devices.
  • l pro vide unwinding device for filamentary material with means for sensing the changeover of the unwinding operation from one coil to another, and means for automatically reducing the speed at which the filamentary material is being unwound during the changeover in accordance with the extent of the fullness of the winding of the filamentary material on the coil.
  • a conventional delay device is provided in accordance with my invention to ensure the fact that the reduced unwinding speed will be maintained for a predetermined period also at the beginning of the unwinding of the new and fully wound succeeding coil, in order to eliminate by means of the reduced unwinding speed the difficulties that occur at the start of the unwinding operation.
  • FIG. 1 is a diagrammatic view partly in section of a Raschel knitting machine constructed in accordance with my invention
  • FIG. 2 is a view of the thread coils mounted on the projecting arm of the machine as seen from the left-hand side thereof in FIG. 1;
  • FIG. 3 is a schematic view of the switching device of FIG. 1 showing the various details and components thereof.
  • a Raschel knitting machine provided with partial warp beams l and 2 rotatably mounted on the upper part of a frame sidewall.
  • Warp threads 3 and 4 lead from the beams l and 2, respectively, through spring seesaws or rocker arms 5 and 6, respective ly, and through respective eye needles 7 and 8 to latch needles 9.
  • Material 10 which has been knitted in the machine is withdrawn from the needles 9 by rotatably mounted feed rollers 11 and 12 suitably driven, for example, through nonillustrated transmission mechanism from a main drive shaft 18 of the machine, and is wound on a beam 13.
  • a projecting arm 14 is secured by a connecting member or crosspiece to the frame sidewall of the machine.
  • a pair of cross wound bobbins or cheeses l and 16 are rotatably mounted on the projecting arm, the threads wound thereon being connected in a conventional manner for the purpose of affording continuous unwinding of a weft 17 therefrom.
  • various conventional structural elements of the Raschel knitting machine which are of no importance to the invention of this application, have been omitted. All of the movements of the Raschel knitting machine are derived in a known manner from the main shaft 18 which is in turn connected through a drive system 19, such as a belt or chain drive, to a variable transmission 20 that is driven by a motor 21.
  • a variable motor 22 serves for varying or adjusting the transmission 20.
  • the motor 22 is coordinated in a conventional manner with the adjusting or varying shaft of the variable transmission 20 and is electrically connected to a switching device or control system 23.
  • Current is supplied from the control system 23 to electric lamps 24 and 25, suitably mounted on the projecting arm 14.
  • the lamps 24 and 25 are located at positions displaced a given distance from a line passing through the axes of the holders for the bobbins and 16, as seen more clearly in H0.
  • variable motor 22 is adjusted to the originally selected rotary speed in response to a signal pulse from a suitable transducer 29 responsive to the inception of rotation of the bobbin 16, when the bobbin 15 has been depleted of the thread originally wound thereon, the feed has shifted to the thread of the bobbin 16 and the bobbin 16 is duly running down.
  • This cycle is repeated in a similar manner through a transducer 28 when the bobbin 16 becomes depleted and, in the interim a new, fully wound bobbin has been substituted for the depleted bobbin 15 and the thread starting end of the new bobbin has been connected to the terminating thread end of the bobbin 16.
  • the speed of the weft 17 running from the bobbins 15 and 16 is necessarily dependent or contingent upon the speed of the main shaft 18.
  • the rotary speed of the main drive shaft 18 as aforedescribed, during the exchange of depleted bobbins .i.e., during the transition of the weft feed from the depleted bobbin 15 to the full bobbin 16, is reduced automatically in accordance with the degree of fullness of the thread winding on the bobbin 15, while, after subsequent transition of weft feed from depleted bobbin to full bobbin, it is readjusted automatically to the increased operating speed, a higher average speed of the Raschel knitting machine can actually be attained with the aid of the novel device of my invention.
  • My invention is not limited to the illustrated embodiment. Many other means may be employed, for example, to determine the extent of fullness of the thread winding on the bobbins. Thus, for example, instead of electro-optical sensing with the aid of the photoelectric cells 26 and 27, mechanical sensing of the bobbin diameter by a suitable mechanical feeler element or a determination of the weight of the bobbin may be employed to the same purpose. Moreover, the scope of my invention is not limited to Raschel knitting machines as shown in the illustrated embodiment and whose use is especially advantageous, but rather is applicable to all unwinding devices for filamentary materials wherein the problems solved by the invention can occur.
  • my invention is to be used not only in those situations wherein the speed of the drawn-off thread or weft is reduced after a bobbin has been depleted beyond a predetermined degree of fullness of the thread wound thereon or a transition of weft feed has taken place from a depleted bobbin to a full bobbin, but can also be used in all other cases wherein disturbances in the running off of the thread can occur in accordance with the extent to which the bobbin is wound.
  • a transformer 30 is energized by a conventional electric supply line to provide lighting current for the lamps 24 and 25.
  • the transformer also supplies current rectified by the full wave rectifier 31 for energizing an induction coil 32 connected in a circuit which is closed by a relay 33 whenever either of the photoelectric cells emits a pulse when subjected to a light beam from the lamps 24 and 25 respectively.
  • the pulse from either of the photoelectric cells 26 and 27 is amplified by the amplifier 34.
  • the induction coil 32 forms part of a two-way relay 35 whose armature 36 is accordingly shifted in the direction of the arrow 37 to complete a circuit to the motor 22 energized from the transformer 30 and including a fullwave rectifier 38 and contacts a,a and b,b.
  • a suitable delay mechanism 39 permits the switch arms c,c of the relay armature 36 to engage the respective contacts a,a and b,b long enough to rotate the armature of the motor 22 through a predetermined rotary angle so as to adjust the transmission 20 to a reduced ratio, and then restore the armature 36 and the switch arms c,c to the noncontacting position shown in FIG. 3.
  • a respective transducer 28 or 29 emits a pulse which is amplified by an amplifier 40 to energize a relay 41 which closes a circuit that includes the rectifier 31 and an induction coil 42.
  • the coil 42 is suitably energized to shift the armature 36 in the direction of the arrow 43 so that the switch arms c,c thereof engage the contacts d,d and e,e of the motor circuit, thereby causing the armature of the motor 22 to rotate in opposite rotary direction to the previous rotation thereof when the contacts a,a and b,b were engaged by the switch arms c,c.
  • the delay mechanism 39 permits the armature of the motor 22 to turn back to its starting position and then disengages the switch arms c,c from the contacts 11,11 and e,e.
  • the adjusting shaft of the transmission 20 has accordingly adjusted the transmission to a ratio which provides a predetermined rotary speed of the main drive shaft 18 to operate the Raschel knitting machine at its highest operating speed for a fully wound bobbin.
  • Unwinding device for filamentary material wound in coils comprising means for withdrawing from a coil, at speeds varying from a maximum value to a minimum value greater than zero, filamentary material wound on the coil, means for determining the extent of fullness of the filamentary material winding in the coil being unwound, and means for automatically regulating, in accordance with the extent of fullness of the filamentary material winding in the coil, the speed of said withdrawing means between said maximum and minimum values.
  • Unwinding device comprises a device for detecting the reduction of fullness in the winding of the coil below a predetermined fullness value
  • said speed regulating means is operatively connected to said device and responsive to a withdrawal of the filamentary material during a changeover from the preceding coil to the next succeeding coil as the winding in the preceding coil is depleted, said speed regulating means being operatively connected to the fullness-determining means and responsive thereto during said changeover for automatically reducing the speed at which the filamentary material is being withdrawn from the coil by said withdrawing means

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Knitting Machines (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
US850539A 1968-08-20 1969-08-15 Unwinding device for filamentary material Expired - Lifetime US3642218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681774713 DE1774713A1 (de) 1968-08-20 1968-08-20 Abspulvorrichtung fuer fadenfoermiges Gut

Publications (1)

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US3642218A true US3642218A (en) 1972-02-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
US850539A Expired - Lifetime US3642218A (en) 1968-08-20 1969-08-15 Unwinding device for filamentary material

Country Status (3)

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US (1) US3642218A (de)
CH (1) CH494182A (de)
DE (1) DE1774713A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030006331A1 (en) * 2001-03-23 2003-01-09 Heaney Daniel J. Unwinder for as-spun elastomeric fiber
US20040104299A1 (en) * 2002-03-19 2004-06-03 Heaney Daniel J. Unwinder for as-spun elastomeric fiber
US20050133653A1 (en) * 2001-03-23 2005-06-23 Invista North America S.A R.L. Tension controlled thread feeding system
FR2887237A1 (fr) * 2005-06-21 2006-12-22 Rieter Textile Machinery Fr Methode de pilotage d'un procede de transformation de fils
US20070152093A1 (en) * 2005-12-30 2007-07-05 Overend Technologies Llc Unwind and feed system for elastomeric thread

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385262B (de) * 1982-10-20 1988-03-10 Mali Josef U Bruder Spulenbremseinrichtung
DE3405760C1 (de) * 1984-02-17 1985-05-15 Roland Dipl.-Ing. 6840 Lampertheim Ludwig Vorrichtung zum kontinuierlichen Abziehen von Draht

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988255A (en) * 1931-04-23 1935-01-15 Hoffman Soons Electrical And E Indicating and operating mechanism
US2104656A (en) * 1934-09-28 1938-01-04 Gen Electric Wire tension controlling device
US2177457A (en) * 1938-05-14 1939-10-24 Western Electric Co Strand handling apparatus
US3189288A (en) * 1962-09-18 1965-06-15 Johns Manville Apparatus for winding strand material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1988255A (en) * 1931-04-23 1935-01-15 Hoffman Soons Electrical And E Indicating and operating mechanism
US2104656A (en) * 1934-09-28 1938-01-04 Gen Electric Wire tension controlling device
US2177457A (en) * 1938-05-14 1939-10-24 Western Electric Co Strand handling apparatus
US3189288A (en) * 1962-09-18 1965-06-15 Johns Manville Apparatus for winding strand material

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030006331A1 (en) * 2001-03-23 2003-01-09 Heaney Daniel J. Unwinder for as-spun elastomeric fiber
US6676054B2 (en) * 2001-03-23 2004-01-13 E. I. Du Pont De Nemours And Company Unwinder for as-spun elastomeric fiber
US20050133653A1 (en) * 2001-03-23 2005-06-23 Invista North America S.A R.L. Tension controlled thread feeding system
US20040104299A1 (en) * 2002-03-19 2004-06-03 Heaney Daniel J. Unwinder for as-spun elastomeric fiber
FR2887237A1 (fr) * 2005-06-21 2006-12-22 Rieter Textile Machinery Fr Methode de pilotage d'un procede de transformation de fils
WO2006136747A3 (fr) * 2005-06-21 2007-11-22 Ritm Methode de pilotage d'un procede de transformation de fils
US20080308664A1 (en) * 2005-06-21 2008-12-18 Ritm Method For Monitoring a Yarn Transforming Process
US20070152093A1 (en) * 2005-12-30 2007-07-05 Overend Technologies Llc Unwind and feed system for elastomeric thread
US20100072316A1 (en) * 2005-12-30 2010-03-25 OverLand Technologies, LLC Unwind and feed system for elastomeric thread
US7878447B2 (en) 2005-12-30 2011-02-01 Overend Technologies, Llc Unwind and feed system for elastomeric thread
US7905446B2 (en) 2005-12-30 2011-03-15 Overend Technologies Llc Unwind and feed system for elastomeric thread

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Publication number Publication date
CH494182A (de) 1970-07-31
DE1774713A1 (de) 1971-11-04

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