US3728550A - Device and method for detecting and withdrawing a predetermined length of yarn - Google Patents

Device and method for detecting and withdrawing a predetermined length of yarn Download PDF

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Publication number
US3728550A
US3728550A US00190741A US3728550DA US3728550A US 3728550 A US3728550 A US 3728550A US 00190741 A US00190741 A US 00190741A US 3728550D A US3728550D A US 3728550DA US 3728550 A US3728550 A US 3728550A
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United States
Prior art keywords
yarn
bend
conduit
turn
short
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Expired - Lifetime
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US00190741A
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English (en)
Inventor
L Cleland
A Harmon
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Maremont Corp
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Maremont Corp
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D01H15/013—Carriages travelling along the machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • 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 device and method disclosed employ a conduit with a bend and preferably a double bend intermediate its ends through which yarn is moved, as by currents of air from a vacuum pump; adjacent the bend or the upstream bend of the double bend a photoprojector and photoreceiver switch detect the presence of yarn at the short-turn of that yarn being drawn thereacross and interrupting the beam of light therebetween to detect a predetermined length of yarn whereupon the photoreceiver switch deactivates the means used to draw yarn through the conduit and thereby establishes a predetermined length of yarn.
  • the device and method are usefully employed with yarn piecers and knotters to avoid excessive yarn wastage and to insure that sufficient yarn is provided to effect piecing or knotting.
  • yarn is defined to include elongate filamentous structures such as continuous filaments, yarn formed of staple fibers and threads and elongate bundles of a plurality of such filaments, yarns and threads which bundles form an elongate filamentous structure.
  • This invention is usefully employed in conjunction with processes and machines used in the processing of such elongate filamentous structures for textile and other uses.
  • machines with which the present device and method are advantageously employed one may include automatic yarn piecing apparatuses used in yarn spinning and twisting applications and knotters used in yarn and thread winding applications.
  • This bend and any other bends of the conduit have what we term for the purposes of this invention a short-turn" and a long-turn path which follow the interior conduit walls around the bend, the short-turn being that portion of the wall pathway at the bend which describes is the shortest path from a point on the cross section of the conduit just preceding the bend to a point on the other cross section of the conduit just following the bend, and the long-turn being that longest pathway following the portion of the wall at the bend from the upstream cross section to the downstream cross section and is usually opposite the short-turn.
  • Intermediate any adjacent bends in the conduit there may be linear conduit portions or substantially so, even over relatively short distances; in defining the nature of the bend one herein uses the relation of the axes of the linear portions just preceding and following the bend.
  • the turnthrough angle of the axial lines of the upstream and downstream linear portions of the conduit wherein the turn-through angle of the bend is that angle through which the extension of the upstream axial line beyond the point of intersection of the axial lines must be rotated to be coincident with the axial line of the downstream linear portion.
  • the conduit bend will have a turn through angle of at least 45, and in preferred embodiments using a double bend the upstream and downstream adjacent bends each will have a turnthrough angle of at least 45, since with bends having turn-through angles in excess of 45, we have found, one may more precisely sense yarn which has been aligned at the short-turn of the bend and in this manner more precisely detect a predetermined length of yarn extending from a supply and through the conduit to and past the bend therein.
  • the bend or where a double bend is used each of the upstream and downstream bends should have a turn-through angle of about or substantially for we have found that with such construction one may most precisely specify, de-.
  • any means may be used to withdraw yarn from a supply thereof and move it through the conduit to and past the bend thereof, the yarn necessarily in such moving extending linearly between any adjacent short-turns of bends in the conduit and following the interior wall of the conduit in curvilinear fashion around the short-turns.
  • the present invention for in moving the yarn through the bend, the yarn in making the turn is forced against the short-turn wall thereof and wherein a double bend is used the yarn between such bends extends in linear fashion and must per force turn about the interior wall of the upstream short turn of this bend; then, by positioning a detecting and/or switch element at this short-turn one may prescribe and/or record a predetermined length of yarn within the conduit and/or extending from the point of withdrawal from a supply thereof to a prescribable distance past this bend. Thus, one may position a photoelectric switch at the short-turn or a piezo-electric device at the short-turn such that yarn abutting the wall thereof will be detected.
  • such detecting and/or switch element may deactivate the means used to withdraw yarn from the supply, according to the invention, so as to prescribe a predetermined length thereof which may be deemed desirable or necessary, such as for example in piecing or knotting operations; such length of yarn then may easily be removed from the conduit for use in such operations.
  • a bifurcate element wherein its opposing arms collate the yarn so that it may be aligned at the apex portion thereof whereat the sensing and/or switching element may be adjacently located.
  • a photoreceiver we employ as the sensing and/or switching element a photoreceiver; therein, we also employ as an activating element a photoprojector located at the long-turn of the bend which focuses a beam of light incident upon the photoreceiver and maintains the means for moving the yarn in an activated state; when the yarn is collated and aligned at the short-turn it interrupts the light beam which causes the photoreceiverswitch to deactivate the means for moving the yarn thus stopping withdrawal of yarn from its supply and prescribing the desired predetermined length hereinbefore described.
  • FIG. 1 in fragmentary side elevation, shows a device of the invention, the pathway of yarn therewithin and a yarn supply;
  • FIG. 2 is a horizontal cross section taken substantially along the line 2-2 of FIG. 1 of the double bend portion of the conduit of the invention, with underlying features in phantom lines;
  • FIG. 3 is a vertical cross section of the double bend portion of the conduit of the invention taken substantially along line 3-3 of FIG. 2;
  • FIG. 4 is an enlarged section taken substantially along line 44 of FIG. 5 showing an end view of the bifurcate yarn aligning element of the invention.
  • FIG. 5 partially broken away, or fragmented and in enlarged side elevation, shows the bifurcate yarn aligning element of the invention in which it is rotated about its axis some from that shown in FIG. 3.
  • a supply of yarn on a yarn package 10 supported on a textile machine (otherwise not shown) for rotation as desired in a winding-up and an unwinding direction, respectively herein clockwise and counterclockwise, comprises wraps of yarn about a cylindrical core 12, known in the art as a cop or tube, to form yarn package 10 which has a terminal end at its surface of the yarn wound about the cop.
  • Such terminal end of the yarn so wound may have been formed as the normal terminal end on a filled package having a desired length of or weight of yarn on the cop which is prescribed for subsequent processing, or a broken or parted terminal end of yarn wherein by premature parting or breakage during processing has formed but a partially filled package on the cop and thus is less than the desired length or weight of yarn required for further processing.
  • further processing may entail the joining of the terminal end with another terminal end from another cop by knotting to form a yet larger package, such as in winding operations, and in the latter circumstance, further processing would require joining the prematurely parted terminal end with another end of yarn from another supply so that a filled package of prescribed amount of yarn may be formed, this joining being made by a piecing operation.
  • the terminal end of yarn usually adheres to the superficial wraps of yarn on the cop.
  • the present device therefor is shown to comprise a yarn withdrawal means, which in this embodiment includes a yarn beater (shown in phantom lines and unnumbered) which strokes the surface of superficial wraps on the cop to dislodge the terminal end of yarn as package 12 is rotated in an unwinding direction such as by motor M through interconnections therewith (not shown), and as yarn is withdrawn from the package by the withdrawal means the beater is continued stroking prevents the yarn so withdrawn from back-wrapping on the package, which back-wrapping may frustrate withdrawal; a conduit having intermediate its ends a double bend, yarn length prescribing and/or detecting element, generally designated 16; an upstream conduit portion thereto 18 which leads to a further upstream nozzle portion of the conduit means 20; and which nozzle portion 20 has a mouth or
  • the yarn withdrawal means also includes a vacuum pump V, actuated by a motor M, so as to draw currents of air through entry 22 and the conduit to and through a waste accumulator W to vacuum pump V; thereby, yarn is dislodged for supply 10, and a cop 12 is rotated in the unwinding direction, the yarn is drawn through entry 22 to and through double bend 16 by such air currents.
  • the yarn follows a very specific pathway, namely a linear pathway between adjacent bends in the conduit and more particularly a pathway which extends linearly between adjacent short-turns and around such turns under the aegis of the air currents which put the yarn under sufficient tension to effect such pathway.
  • double bend 16 has an upstream conduit portion A, an intermediate conduit portion B, the upstream bend included therebetween having a turn-through angle of about 90, and a downstream conduit portion C wherein the turnthrough angle of the downstream bend included between portion B and C also is approximately 90 and wherein portions A, B and C are substantially linear longitudinally thereof.
  • a photoreceiver means R is positioned at theshort-turn of the bend included between conduit portions A and B, and a photoprojector means is positioned at the long-turn thereof so that photoprojector P may focus a beam of light diagonally across the bend to impinge upon photoreceiver R.
  • Yarn 24 is moved through this upstream bend of the double bend 16 and forced against the short-turn thereof by the tension created by the currents of air moving it through the conduit thus to interrupt the light beam.
  • photoreceiver R will actuate either a recorder or other readout device to indicate that the prescriblength of yarn has been obtained, or will deactuate motor M to stop rotation of cop 12 and package 10 and stop vacuum pump P to stop the flow of currents of air through the conduit and thereby stop the withdrawal of yarn 24 to establish the desired predetermined length of yarn 24 between the point where it leaves package 10 and its terminal end 26 within conduit portion C just beyond the aforesaid upstream short-turn.
  • a bifurcate aligning and yarn collating element is positioned, an exemplarily shown in FIGS. 3, 4 and 5.
  • the purpose of this element is to assure a more immediate aligning of yarn 24 proximal to or in otherwise actuating relationship to the detecting and/or switch device.
  • a collating element may be a bifurcated notch in the wall at the short-turn, the sloped wall of which act as opposing yarn receiving arms to collate the yarn thereat and position and align the yarn across the apex of the notch in actuating relationship to the detecting and/or switch device.
  • the collating element 28 is in the form of a generally cylindrical member with bifurcate opposing and yarn collating arms 30A and 30B having divergent faces inwardly directed to a slot generally across a diameter of the element and of sufficient width to admit yarn therebetween faces 32 thereof; slot 32, so defined, separates divergent arms 30A and 30B and terminates at the apex 33 of such arms.
  • Element 28 at its other end is counterbored with a hole or recess 35 of size sufficient to receive and hold the photoreceiving element R of a detecting and/or switch device, and has a central hole 34 having a diameter approximately the diameter of slot 32 communicating therewith and providing a light path between slot 32 at apex 33 and photoreceiver R within recess 35.
  • set screws 36,38 are provided set into female threaded holes 40,42 such that approximately half a diameter of the bottom face of these screws may intrude into slot 32 in parallel relation to the respective slot walls of arms 30A and 303.
  • yarn collated by divergent arms 30A and 308 will be aligned between the bottom surfaces of set screws 36,38 at apex 33 so as to completely cut off light which would otherwise extend from photoprojector P, across the bend, through slot 32, past apex 33 and through hole 34 and recess 35 to impinge upon photoreceptor R.
  • Appropriate circuitry well known to the art and otherwise not described herein, in use to connect photoreceptor or photoreceiver R with motor M so that the latter will normally be operative so long as light is received by photoreceiver R and is deactuated when light is no longer received.
  • the yarn receiving distance between the bottoms of screws 36,38 may be adjusted by using a flat gauge with thickness of that of the yarn 24 to be processed.
  • a device for the withdrawal of a predetermined length yarn from a supply thereof comprising:
  • conduit means for establishing an enclosed, internal pathway of predetermined length for said withdrawn yarn, said means having an entry for receiving yarn from said supply, a fixed bend at a predetermined distance from said entry and a second fixed bend beyond said bend;
  • yarn withdrawal means for withdrawing yarn from said supply through said pathway and adjacent the short-turn of said bend
  • switch means located at least in part within said enclosed internal pathway adjacent said short-turn, for sensing the presence of yarn thereat and deactivating said withdrawal means thereupon; wherein, said predetermined yarn pathway is established from said entry to and around said short-turn and to and around said second bend.
  • a device as in claim 1 wherein said bend and second bend are joined by a linear portion of said conduit, and have upstream and downstream thereof, respectively, conduit portions which are substantially linear, and
  • a device as in claim 2, wherein said turn-through angle of said two sets of axes is substantially 90.
  • said switch means comprises sensing and deactivating means located at the shortturn of said bend for photoelectric sensing of the presence of yarn within said bend and for deactivating said withdrawal means.
  • switch means further comprises activating means located at the long-turn of said bend for cooperation with said sensing and deactivating means for maintaining said withdrawal means in an activated state in the absence of yarn within said bend.
  • sensing and deactivating means is in the form of a photoreceiver switch and said activating means is in the form of a photoprojector, and wherein said photoprojector and photoreceiver cooperate through a light beam extending therebetween within said bend to maintain said withdrawal means in an activated state in the absence of yarn therebetween.
  • sensing and deactivatingmeans comfprises yarn aligning means or aligning yarn within said internal pathway and at said bend adjacent said short-turn thereof and sensing and switching means for sensing said aligned yarn and for deactivating said withdrawal means.
  • said yarn aligning means includes a bifurcate yarn collating element having opposing yarn receiving arms meeting in an apex portion, said arms opening into the interior of said conduit bend, whereby yarn withdrawn from said supply and through said conduit means is received between said arms and aligned adjacent said. apex.
  • a method for detecting a predetermined length of yarn comprising moving said yarn through a conduit having a predetermined enclosed internal pathway including a fixed bend, and a second fixed bend therein,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
US00190741A 1971-10-20 1971-10-20 Device and method for detecting and withdrawing a predetermined length of yarn Expired - Lifetime US3728550A (en)

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Application Number Priority Date Filing Date Title
US19074171A 1971-10-20 1971-10-20

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US3728550A true US3728550A (en) 1973-04-17

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US00190741A Expired - Lifetime US3728550A (en) 1971-10-20 1971-10-20 Device and method for detecting and withdrawing a predetermined length of yarn

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US (1) US3728550A (enrdf_load_stackoverflow)
JP (1) JPS5138811B2 (enrdf_load_stackoverflow)
CA (1) CA953897A (enrdf_load_stackoverflow)
CH (1) CH539576A (enrdf_load_stackoverflow)
DE (1) DE2163210C3 (enrdf_load_stackoverflow)
GB (1) GB1368141A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303201A1 (de) * 1987-08-11 1989-02-15 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum selbsttätigen Fadenansetzen an einer Ringspinnmaschine
US5288030A (en) * 1990-08-07 1994-02-22 W. Schlafhorst Ag & Co. Automatic positioning device for a yarn end finder
US5426929A (en) * 1990-02-10 1995-06-27 W. Schlafhorst Ag & Co. Method and apparatus for forming a yarn reserve on a cross-wound bobbin
US5590845A (en) * 1993-09-24 1997-01-07 Murata Kikai Kabushiki Kaisha Yarn end finding apparatus and method
US5605296A (en) * 1994-09-28 1997-02-25 W. Schlafhorst Ag & Co. Method and apparatus for winding a yarn
US5765770A (en) * 1992-07-08 1998-06-16 W. Schlafhorst Ag & Co. Method and apparatus for grasping a yarn end on a cheese
US20080217462A1 (en) * 2004-01-22 2008-09-11 Saurer Gmbh & Co.Kg Device For Detecting A Thread

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49143505U (enrdf_load_stackoverflow) * 1973-03-12 1974-12-11
JPS5733263B2 (enrdf_load_stackoverflow) * 1973-11-05 1982-07-16
JPS5759180B2 (enrdf_load_stackoverflow) * 1973-11-05 1982-12-13 Teijin Ltd
JPS5094238A (enrdf_load_stackoverflow) * 1973-12-27 1975-07-26
GB2143548A (en) * 1983-07-21 1985-02-13 Hollingsworth Yarn end catching
JP2561087B2 (ja) * 1987-04-15 1996-12-04 津田駒工業株式会社 無杼織機における給系案内装置
DE3925861A1 (de) * 1989-08-04 1991-02-07 Schlafhorst & Co W Kopsvorbereitungseinrichtung zum aufwinden des fadenanfanges auf der huelsenspitze des kopses
DE4308058A1 (de) * 1993-03-13 1994-09-15 Schlafhorst & Co W Vorrichtung zum Erkennen eines Fadens in einem luftdurchströmten Kanal
DE19501464C1 (de) * 1995-01-19 1996-05-23 Zinser Textilmaschinen Gmbh Vorrichtung zum selbsttätigen Beheben von Fadenbrüchen an Ringspinnmaschinen
DE19640184B4 (de) * 1996-09-30 2005-10-13 Saurer Gmbh & Co. Kg Verfahren zum Ausreinigen von Garnfehlern an einer Spulstelle einer Spulmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203634A (en) * 1961-12-11 1965-08-31 Reiners Walter Suction device for removing a starting length of yarn from a textile coil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203634A (en) * 1961-12-11 1965-08-31 Reiners Walter Suction device for removing a starting length of yarn from a textile coil

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0303201A1 (de) * 1987-08-11 1989-02-15 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum selbsttätigen Fadenansetzen an einer Ringspinnmaschine
US5426929A (en) * 1990-02-10 1995-06-27 W. Schlafhorst Ag & Co. Method and apparatus for forming a yarn reserve on a cross-wound bobbin
US5288030A (en) * 1990-08-07 1994-02-22 W. Schlafhorst Ag & Co. Automatic positioning device for a yarn end finder
US5765770A (en) * 1992-07-08 1998-06-16 W. Schlafhorst Ag & Co. Method and apparatus for grasping a yarn end on a cheese
US5590845A (en) * 1993-09-24 1997-01-07 Murata Kikai Kabushiki Kaisha Yarn end finding apparatus and method
US5605296A (en) * 1994-09-28 1997-02-25 W. Schlafhorst Ag & Co. Method and apparatus for winding a yarn
US20080217462A1 (en) * 2004-01-22 2008-09-11 Saurer Gmbh & Co.Kg Device For Detecting A Thread
US7504617B2 (en) 2004-01-22 2009-03-17 Oerlikon Textile Gmbh & Co. Kg Device for detecting a thread during the detection of thread ends in a suction pipe
CN100542924C (zh) * 2004-01-22 2009-09-23 欧瑞康纺织有限及两合公司 用于检测纱线的装置

Also Published As

Publication number Publication date
CA953897A (en) 1974-09-03
GB1368141A (en) 1974-09-25
DE2163210A1 (de) 1973-04-26
CH539576A (de) 1973-07-31
JPS5138811B2 (enrdf_load_stackoverflow) 1976-10-23
DE2163210C3 (de) 1975-03-27
JPS4848727A (enrdf_load_stackoverflow) 1973-07-10
DE2163210B2 (de) 1974-08-08

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