US2542331A - Process and apparatus for drafting uniform roving - Google Patents

Process and apparatus for drafting uniform roving Download PDF

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Publication number
US2542331A
US2542331A US735737A US73573747A US2542331A US 2542331 A US2542331 A US 2542331A US 735737 A US735737 A US 735737A US 73573747 A US73573747 A US 73573747A US 2542331 A US2542331 A US 2542331A
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strand
feeding
current
fibers
stretching
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US735737A
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English (en)
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Johannes N Hiensch
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/32—Regulating or varying draft
    • D01H5/38—Regulating or varying draft in response to irregularities in material ; Measuring irregularities
    • D01H5/42—Regulating or varying draft in response to irregularities in material ; Measuring irregularities employing electrical time-delay devices

Definitions

  • PROCESS AND APPARATUS FOR DRAFTING UNIFORH ROVING Filed March 19, 1947 Patented Feb. 20, 1951 PROCESS AND APPARATUS FOR DRAFTING UNIFORM ROVING Johannes N. Hiensch, Tarrytown, N. Y.
  • One object of this invention is to provide a process and apparatus for drafting or stretching a textile strand with a tension which is controlled automatically by the number of fibers in the cross section of the strand at a particular location.
  • Another object is to provide a process and apparatus for stretching a strand of roving wherein the electrical resistance set up in a selected portion of the strand automatically controls the amount of tension imparted to the strand, the strand havin been previously rendered temporarily current-conducting, for example, by having been immersed in an electrolyte, or by having been treated with a colloidal solution of graphite or metal or with other finely divided conducting material.
  • Another object is to provide a process and apparatus, as set forth in the preceding objects, wherein the strand of roving is stretched between two spaced sets of toothed feeding and stretching rollers driven by separate electric motors, the forward motor being automatically controlled to rotate at a slightly higher speed than the rearward motor so as to impart a tension stretching to the strand.
  • Another object is to provide a process and apparatus, as set forth in the preceding objects wherein the speed of the forward motor is regulated by an electrical control device in accordance with the electrical resistance of a portion of the strand passing between spaced contacts whereby the strand is stretched or tensioned in accordance with the thickness of the portion passing between the contacts.
  • the strand of roving is stretched or tensioned in accordance with the number of fibers which are present in a given portion of the strand regardless of the strength of the strand as a whole, or of the distribution of the fibers.
  • the strand is rendered current-conducting by being immersed in an electrolyte or by being treated with a colloidal solution of graphite or metal or with other finely divided conducting material. An electric current is then passed through a portion of the strand which is being conducted through spaced stretching or tensionin rollers which are electro-mechanically operated, the stretching or tensioning being controlled by the electrical resistance encountered by the current.
  • the amount of current which passes through the selected portion of the strand depends directly upon the number of fibers in the strand. If the number of fibers is large, so that the strand is strong, a stronger current passes through them and the strand is therefore stretched or tensioned more powerfully than when the number of fibers is small so that the strand is weak, the electrical resistance higher and the current weaker.
  • the figure shows a preferred form of apparatus for automatically stretching or tensioning a strand I ll of roving composed of individual fibers II.
  • the showing of the individual fibers l l is of course fanciful and purely by way of illustration since in practice the fibers would be in discontinuous lengths and far more closely packed so as to be individually indistingushable on the scale shown in the drawing.
  • the strand I0 is first made temporarily electrically conducting by being immersed in a tank I2 containing an electrolyte I 3 or a colloidal solution of graphite or metal or having other means for applying fine particles of conducting material to the fibers II.
  • the finely divided conducting material may be applied to the fibers while in solution, the fibers then being dried.
  • the finely divided conducting material may also be applied to the fibers in dry form. Since the current conductivity depends upon the condition of dampness of the fibers, it
  • the strand in after emerging from the tank 12 passes between grooved or roughened rearward feeding rollers l4 and I5 mounted on shafts l6 and i1.
  • the shaft It carries a pulley l3 driven by a belt l3 from a pulley on the output shaft 2
  • the shaft l1 carrying the feed roller 15 may rotate freely but is preferably driven in synchronism with the shaft IE but in the opposite direction so that the strand I3 is fed smoothly and evenly out of the tank I2.
  • the shaft 11, for example, may be driven by gearing (not shown) from the shaft It.
  • a s rocket chain and sprockets may obviously be substituted.
  • Theforward end of the strand l3 passes between forward feeding rollers 25 and 25 mounted on shafts 21 and 23 respectively.
  • the shaft 21 is driven in a similar manner to the shaft l3 in any suitable way, such as by a pulley 23 and a belt from a pulley 3
  • the feeding roller 25 and shaft 23, as in the case of the feeding roller l5 and shaft 11, may rotate freely or may be positively driven in synchronism with the roller 25 and shaft 21, but in the opposite direction. As stated above, this may be accomplished by suitable gearing (not shown) arranged between the shafts 21 and 23.
  • the forward feeding rollers 25 and 23 are driven at a slightly higher speed by the motor 33 than the rearward feeding rollers 14 and I5 by the motor 22.
  • the speed of the motor 33 is regulated according to the number of fibers ll momentarily present in a given location, such as the location between a pair of contact rollers 34 and 35 located on opposite sides of the strand in between the forward feeding rollers 25 and 25 and the rearward feeding rollers I4 and I5.
  • the contact rollers 34 and 35 are mounted on shafts 35 and 31 respectively.
  • the upper contact roller 34 is engaged by a contact arm 33 which is connected as at 33 to a weight 43 or an equivalent spring (not shown) whereby the arm 38 is held in good electrical contact with the contact roller 34 and the latter in turn is urged downward to compress the fibers H forming the strand llil Connected to the weight 40, as by the conductor 4
  • the motor controller 42 is in turn connected by a conductor 43 to a contact arm 44 engaging the shaft 21 so that when the motor controller 42 is energized, a current may flow through a circuit indicated by the arrows, a part of which circuit is formed by the portion of the strand In which, at the moment, lies between the contact rollers 34 and 35 and the forward feeding rollers 25 and 23.
  • the strand II) has been rendered temporarily electrically conducting by the liquid l3 in the tank l2.
  • the motor controller 42 is connected to the motor 33 which it controls by the conductors 45 and 45, and is energized from the power lines 41 and 43.
  • the current supplied to the motor 33 through the conductors 45 and 43 from the power lines 41 and 43 is regulated by the motor controller 42 in proportion to the control current flowing through the circuit including the conductor 4
  • This control current depends on the electrical resistance of the portion 43 of the strand l0 lying between the contact rollers 34 and 35 and the'feeding rollers 25 and 23.
  • the electrical resistance of the strand portion 43 moreover is dependent upon the number of fibers of which it is momentarily composed, the resistance of course being higher with a small number of fibers and lower with a large number of fibers.
  • the strand in of roving is first immersed in the electrolyte 13 or other conduction-producing liquid and is then threaded between the rearward feeding rollers 14 and I5, the contact rollers 34 and 35 and the forward feeding rollers 25 and 25.
  • the motors 22 and 33 are then started in operation by energizing the V
  • the motor 22 and accordingly the feeding rollers l4 and I5 are caused to rotate at a substantially constant speed, causing the strand in to be fed forward at a substantially constant speed.
  • the motor 33 is caused to rotate at a much higher speed than the motor 22, so that the forward feeding rollers 25 and 25, by rotating much more rapidly than the rearward feeding rollers l4 and I5, impart a stretching or tensioning to the strand Ill.
  • the motor 33 is caused to rotate at a variable speed under the control of the motor controller 42, in accordance with the resistance encountered by the control current passing through the above-described control circuit, including the strand portion 43. As the number of fibers in the strand portion 43 momentarily decreases, its electrical resistance rises, hence the control current in the control circuit falls. This causes the motor control 42 to reduce the current flowing through the conductors 45 and 45 to the motor 33, reducing the speed of the motor 33.
  • the strand 10 is given a greater stretching or tension when the number of fibers in the strand portion 43 momentarily increases and the strand In therefore increases in tensile strength.
  • controller 42 in accordance with the rise and fall of the resistance in the control circuit and particularly in the strand portion 49, automatically varies the tension or stretching of the strand ill in accordance with the number of fibers in the strand portion 49 and therefore in accordance with the tensile strength. If the number of fibers in the strand portion 49 is large, that is, if the strand is strong, then the strength of the current will be great and the strand will thus be stretched or tensioned more strongly than if the number of fibers therein is relatively small.
  • a process for automatically stretching a textile strand while preparing it for spinning comprising rendering the strand electrically-conducting, electro-mechanically feeding the electrically conducting strand at spaced forward and rearward locations along the strand, feeding the strand at said forward location at a higher speed than at said rearward location to stretch the strand at a predetermined tension while feeding it, passing an electric current through a portion of the strand being stretched, and varying the tension applied to said strand above and below said predetermined tension in accordance with the variation in the electrical resistance of the current-carrying portion of the strand.
  • a process for automatically stretching a textile strand while preparin it for spinning comprising rendering the strand electrically-conducting, electro-mechanically feeding the electrically-conducting strand at spaced forward and rearward locations along the strand, feeding the strand at said forward location at a higher speed than at said rearward location to stretch the strand at a predetermined tension while feeding it, passing an electric current through a portion of the strand being stretched, and varying the tension applied to said strand above and below said predetermined tension in accordance with the increase and decrease of the electric current as governed by the variation in the electrical resistance of the current-carrying portion of the strand.
  • a process for automatically stretching a textile strand while preparing it for spinning comprising rendering the strand electrically-conducting by applying a current-conducting substance to the strand, electro-mechanically feeding the electrically-conducting strand at spaced forward and rearward locations along the strand, feeding the strand at said forward location at a higher speed than at said rearward location to stretch the strand at a predetermined tension while feeding it, passing an electric current through a portion of the strand being stretched, and varying the tension applied to said strand above and below said predetermined tension in accordance with the variation in the electrical resistance of the current-carrying portion of the strand.
  • a process for automatically stretching a textile strand while preparing it for spinning comprising rendering the strand electrically-conducting by immersing the strand in a currentconducting liquid, electro-mechanically feeding the electrically-conducting strand at spaced forward and rearward locations along the strand,
  • Apparatus for automatically stretching an electrically-conducting textile strand while preparing it for spinning and adapted to be energized from a source of electric current comprising a pair of spaced rotary feeding elements mounted in forward and rearward positions along the strand relatively to the direction of travel of the strand for feeding and stretching the strand, an electrical driving device drivingly connected to said forward feeding element, an electrical driving device drivingly connected to said rearward feeding element, spaced electrical.
  • contact members engaging spaced portions on a predetermined length of said strand, an electric circuit connecting said contact members with said source of electric current for passing said current through said predetermined length of strand, and an electrical control apparatus connected to said circuit and to the forward element driving device and responsive to the variation of the electric current passin through said length of strand for varying the speed of the forward element driving device within a speed range different from and higher than the speed of the rearward element driving device.
  • Apparatus for automatically stretching an electrically-conducting textile strand while preparing it for spinning and adapted to be energized from a source of electric current comprising a pair of spaced rotary feeding elements mounted in forward and rearward positions along the strand relatively to the direction of travel of the strand for feeding and stretching the strand, a variable-speed electrical driving device connected to the forward feeding element, a substan tially-constant-speed electrical driving device connected to the rearward feeding element, spaced electrical contact members engaging spaced portions on a predetermined length of said strand, an electric circuit connecting said contact members with said source of electric current for passing said current through said predetermined length of strand, and an electrical control apparatus connected to said circuit and to the forward element driving device and responsive to the variation of the electric current passing through said length of strand for varying the speed of the forward element driving device within a speed range different from and higher than the speed of the rearward driving device.
  • Apparatus for automatically stretching a textile strand while preparing it for spinning and adapted to be energized from a source of electric current comprising an electrically-conducting substance applicator engaging said strand for rendering said strand electrically current-conducting, a pair of spaced rotary feeding elements mounted in forward and rearward positions along the strand relatively to the direction of travel of the strand for feeding and stretching the strand, an electrical driving device drivingly connected to said forward feeding element, an electrical driving device drivingly connected to said rearward feeding element, spaced electrical contact members engaging spaced portions on a predetermined length of said strand, an electric circuit connecting said contact members with said source. of electric current for-passing said current through said predetermined.
  • Apparatus for automatically stretching a textile strand while preparing it for spinning and adapted to be energized from a source of electric current comprising an immersion appliance for immersing the strand in an electrically-conducting fluid, a pair of spaced rotary feeding elements mounted in forward and rearward positions along the strand relatively to the dirzction of travel of the strand for feeding and stretching the strand, an electrical driving device drivingly connected to said forward feeding element, an electrical driving device drivingly connected to said rearward feeding element, spaced electrical contact members engaging spaced portions on a predetermined length of said strand, an electric circuit connecting said contact members with said source of electric current for passing said current through said predet:.rmined length of strand, and an electric control apparatus connected to said circuit and to the forward element driving device and responsive to the variation of the electric current passing through said length of strand for varying the speed of the forward element driving device within a speed range differentfrom and higher than the speed of the rearward element driving device.
  • a process for treatingan electrically conductive textile strand comprising stretching the strand under tension while feeding the same, passing an electric current through a portion of the strand being stretched, and varying the tension applied to the strand in accordance with variations in the electrical current flowing through the current carrying portion of the strand.
  • Apparatus for automatically stretching an electrically-conducting textile strand while preparing it for-spinning and adapted to been.- ergized from a source of electric current comprising a pair of spaced rotary feeding elements mounted in forward and rearward positions along the strand relatively to the direction of travel of the strand for feeding and stretching the strand; a driving device drivlngly connected to said forward feeding element, a driving device drivingly connected to said rearward feeding eiement, spaced electrical contact members engaging spaced portions on a predetermined length of said strand, an electric circuit connecting said contact members with said source of electric current for passing said current through said predetermined length of strand, and an electrical control apparatus connected to said circuit and to one of said driving devices and responsive to the variation of the electric current passing through said length of strand for varying the speed of said one driving device within a speed range different from and higher than the speed of the other driving device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US735737A 1944-07-25 1947-03-19 Process and apparatus for drafting uniform roving Expired - Lifetime US2542331A (en)

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NL263234X 1944-07-25

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BE (1) BE464712A (de)
CH (1) CH263234A (de)
NL (1) NL61234C (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641025A (en) * 1947-10-29 1953-06-09 Jr John C Busby Apparatus and method for drafting fibers
US2729857A (en) * 1950-04-18 1956-01-10 Daniel E Cushing Sliver drafter evener
US2740992A (en) * 1955-03-01 1956-04-10 Bancroft & Sons Co J Crimping and winding apparatus
US2804744A (en) * 1951-11-19 1957-09-03 Breuning Ernst Supervision and control of textile manufacturing processes
US2812553A (en) * 1954-06-24 1957-11-12 Ind Res Inst Of The University Textile machine device
US2905976A (en) * 1955-04-01 1959-09-29 Linen Industry Res Ass Of The Drafting of textile fibres
US3035226A (en) * 1954-11-17 1962-05-15 Strandberg Eng Lab Inc Method for determining textile lap weights
US3231940A (en) * 1961-03-15 1966-02-01 Cotton Silk & Man Made Fibres Control mechanism
US3511063A (en) * 1967-04-24 1970-05-12 Deering Milliken Res Corp Knitting machine improvement
US4068167A (en) * 1976-09-01 1978-01-10 The United States Of America As Represented By The Secretary Of Agriculture Radial electrode for determining the amount of moisture in seed cotton
US4864694A (en) * 1986-10-17 1989-09-12 Zinser Textilemaschinen Gmbh Apparatus for controlling the sliver drafting arrangement in a textile draw frame

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589450A (en) * 1925-06-19 1926-06-22 F C Huyck & Sons Method and machine for manufacturing paper
US1976487A (en) * 1931-05-06 1934-10-09 Westinghouse Electric & Mfg Co Motor-control system
US2068352A (en) * 1931-06-15 1937-01-19 Western Electric Co Tungsten wire reducing machine
US2132753A (en) * 1938-10-11 Yarn and cord stretching apparatus
US2212691A (en) * 1938-07-05 1940-08-27 Drummondville Cotton Company L Cord preparing mechanism
US2213983A (en) * 1938-07-12 1940-09-10 Okonite Callender Cable Co Inc Apparatus for electrically measuring the wall thickness of metal tubing and for controlling the wall thickness
US2278510A (en) * 1939-07-26 1942-04-07 Westinghouse Electric & Mfg Co Sensitive device for measuring linear density of wire
US2303983A (en) * 1941-05-31 1942-12-01 Rca Corp Heat treating apparatus
US2359170A (en) * 1943-06-17 1944-09-26 American Steel & Wire Co Wire rope prestressing machine
US2361217A (en) * 1941-01-02 1944-10-24 Us Rubber Co Apparatus for producing highly uniform sliver
US2393117A (en) * 1944-08-25 1946-01-15 Mcmullen John Slack adjuster
US2398975A (en) * 1944-06-15 1946-04-23 Wire Machinery Corp Means for prestressing cable
US2407100A (en) * 1943-06-26 1946-09-03 Gen Electric Drafting of fibers

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2132753A (en) * 1938-10-11 Yarn and cord stretching apparatus
US1589450A (en) * 1925-06-19 1926-06-22 F C Huyck & Sons Method and machine for manufacturing paper
US1976487A (en) * 1931-05-06 1934-10-09 Westinghouse Electric & Mfg Co Motor-control system
US2068352A (en) * 1931-06-15 1937-01-19 Western Electric Co Tungsten wire reducing machine
US2212691A (en) * 1938-07-05 1940-08-27 Drummondville Cotton Company L Cord preparing mechanism
US2213983A (en) * 1938-07-12 1940-09-10 Okonite Callender Cable Co Inc Apparatus for electrically measuring the wall thickness of metal tubing and for controlling the wall thickness
US2278510A (en) * 1939-07-26 1942-04-07 Westinghouse Electric & Mfg Co Sensitive device for measuring linear density of wire
US2361217A (en) * 1941-01-02 1944-10-24 Us Rubber Co Apparatus for producing highly uniform sliver
US2303983A (en) * 1941-05-31 1942-12-01 Rca Corp Heat treating apparatus
US2359170A (en) * 1943-06-17 1944-09-26 American Steel & Wire Co Wire rope prestressing machine
US2407100A (en) * 1943-06-26 1946-09-03 Gen Electric Drafting of fibers
US2398975A (en) * 1944-06-15 1946-04-23 Wire Machinery Corp Means for prestressing cable
US2393117A (en) * 1944-08-25 1946-01-15 Mcmullen John Slack adjuster

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2641025A (en) * 1947-10-29 1953-06-09 Jr John C Busby Apparatus and method for drafting fibers
US2729857A (en) * 1950-04-18 1956-01-10 Daniel E Cushing Sliver drafter evener
US2804744A (en) * 1951-11-19 1957-09-03 Breuning Ernst Supervision and control of textile manufacturing processes
US2812553A (en) * 1954-06-24 1957-11-12 Ind Res Inst Of The University Textile machine device
US3035226A (en) * 1954-11-17 1962-05-15 Strandberg Eng Lab Inc Method for determining textile lap weights
US2740992A (en) * 1955-03-01 1956-04-10 Bancroft & Sons Co J Crimping and winding apparatus
US2905976A (en) * 1955-04-01 1959-09-29 Linen Industry Res Ass Of The Drafting of textile fibres
US3231940A (en) * 1961-03-15 1966-02-01 Cotton Silk & Man Made Fibres Control mechanism
US3511063A (en) * 1967-04-24 1970-05-12 Deering Milliken Res Corp Knitting machine improvement
US4068167A (en) * 1976-09-01 1978-01-10 The United States Of America As Represented By The Secretary Of Agriculture Radial electrode for determining the amount of moisture in seed cotton
US4864694A (en) * 1986-10-17 1989-09-12 Zinser Textilemaschinen Gmbh Apparatus for controlling the sliver drafting arrangement in a textile draw frame

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Publication number Publication date
NL61234C (de)
BE464712A (de)
CH263234A (de) 1949-08-31

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