US3130454A - Textile drafting apparatus - Google Patents

Textile drafting apparatus Download PDF

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Publication number
US3130454A
US3130454A US103333A US10333361A US3130454A US 3130454 A US3130454 A US 3130454A US 103333 A US103333 A US 103333A US 10333361 A US10333361 A US 10333361A US 3130454 A US3130454 A US 3130454A
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US
United States
Prior art keywords
aprons
rollers
drafting
pair
sliver
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
US103333A
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English (en)
Inventor
John K P Mackie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
James Mackie and Sons Ltd
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James Mackie and Sons Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by James Mackie and Sons Ltd filed Critical James Mackie and Sons Ltd
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Publication of US3130454A publication Critical patent/US3130454A/en
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Classifications

    • 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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • This invention relates to drafting apparatus of the double apron type, in which the sliver is controlled in the drafting zone between a pair of moving aprons each in the form of a continuous belt driven by a driving roller over which it passes.
  • the invention is concerned particularly with such devices when fitted to spinning frames for the direct spinning of textile yarns from sliver and also when fitted, for example, to roving frames or when used for finisher drawing operation.
  • the sliver Before passing to the aprons in such a device the sliver normally passes along a conductor which controls the width of the incoming sliver and as it leaves the aprons to pass to the drafting rollers the sliver passes through a further conductor which has the effect of condensing the sliver to a width suitable for spinning. With all types of fibre there is a tendency for the sliver to spread laterally during its passage along the aprons and the conductor preceding the drafting rollers is intended to correct this spread.
  • the sliver is of a much bulkier nature and has a considerably greater tendency to spread laterally during its passage along the apron.
  • the sliver has to be condensed quite abruptly before passing to the drafting rollers and it is found that instead of taking place regularly the condensation tends to occur spasmodically, producing irregularities in the yarn.
  • a further effect arising from the lateral spread of the sliver is that it tends to depart from a roughly rectangular cross-section and to become attenuated at the edges so that the side portions are not -ontrolled by the aprons. This again gives rise to irregarities in the yarn.
  • side control surfaces are provided which extend along the control aprons and beyond them towards the nip of the drawing rollers. These serve to restrain the fibres laterally thus restricting the width of the sliver and avoiding the lateral spread referred to above. Moreover, the need for further condensation before passing to the drawing rollers is avoided.
  • a construction in accordance with the invention is found to improve the drafting of all types of sliver to a marked extent. The fact that no conductor requires to be inserted for the condensation of the fibres between the ends of the aprons and the drawing rollers means that this gap may be reduced in length so that the control of the fibres is more complete.
  • the drawing roller serves to act as a lap preven-ter in that it removes the fibres from the apron more positively and avoids any build-up of fibres which might otherwise lead to slubs in the yarn.
  • the side control surfaces are provided by members which are shaped so as to extend into and conform with the configuration of the nip between the drawing rollers. in this way the gap between the tips of the members and the drawing rollers may be made as small as reasonably possible.
  • the drawing pressing roller is normally covered with rubber, there is a small amount of distortion when pressure is applied to it and the gap between the tips of the side members and this roller must be sufiiciently large to avoid any risk of contact when the roller is distorted.
  • both aprons should pass close to the nip between the drawing rollers.
  • they may pass around guide members located between the side control surfaces so as to constitute a nose portion to the assembly of aprons which can be introduced close to the nip of the drawing rollers.
  • the guide members may be stationary and anti-friction rollers may be provided in addition to the guide members.
  • the anti-friction rollers require to be positioned so that this angle lies between 30 and Over this range it is found that the friction introduced is not objectionable.
  • the lower of the two may form a bridge between the side control surfaces and also a support for the upper run of the lower apron.
  • the upper guide member may be formed as an oflfset extension from a member lying above the side control surface on one side of the aprons and this member may be pivoted around the axis of a drafting roller for the top apron, being loaded so as to apply pressure to the top apron guide member.
  • This pressure may be further augmented by the inclusion of a leaf spring bearing downwardly on the lower run of the upper apron to press it against the lower apron.
  • FIGURE 1 is a sectional elevation of the drafting apparatus
  • FIGURE 2 is a detailed view to an enlarged scale of part of the apparatus shown in FIGURE 1;
  • FIGURE 3 is a view of the parts shown in FIGURE 2 seen along the line of the arrow III;
  • FIGURE 4 is a plan View corresponding to FIGURE 1, and showing two adjacent units of a multi-unit machine.
  • FIGURE 1 the sliver which is shown as 1 passes via a feed conductor 2 to feed rollers 3 and 4 and thence by way of an intermediate conductor 5 to the drafting apparatus.
  • This comprises an upper apron 6 and a lower apron 7 between which the sliver passes and which control it as it is drafted by the drawing rollers 8 and 9.
  • the apparatus is of the well known type.
  • lateral control is also provided by a pair of side plates, one of which is seen in FIGURE 1 at 12.
  • the aprons 6 and 7 instead of being considerably wider than the sliver as is normally the case are made in the form of relatively narrow belts as seen from FIGURES 3 and 4 of a width slightly less than the natural width of the sliver so that the side plates act directly on the sides of the sliver, preventing the lateral spread referred to previously and maintaining the sliver in a generally rec tangular cross-section during drafting. Moreover the V a width of the conductor is less than that of the aprons so as to restrict the width of the sliver accordingly.
  • the side plates extend beyond the end of the aprons as seen most clearly in FIGURE 2.
  • the tips of the plates are shaped at 13 and 14 so as to conform with the configuration of the space between the drawing rollers 8 and 9 and thus to extend right into the nip between the two rollers which is indicated as 15.
  • the gaps between the shaped portions of the side plates and the two rollers are made as small as reasonably possible consistent with the need to avoid the possibility of direct contact, particularly in view of the possible distortion of the drawing pressing roller 9 as previously mentioned.
  • rollers 20 which are positively driven and these rollers are of sufficiently large diameter to' leave space between their axles 21 for the passage of the side plates which extend back as far as the intermediate conductor 5, both rollers being narrow faced to enter between the side plates.
  • the axles 21 are geared together by means of pinions 18 and 19 seen in FIGURE 4 but the remainder of the drive is not shown.
  • rollers cannot be used because in order for the aprons to extend reasonably close to the nip 15, they need to turn back on themselves relatively sharply as seen in FIGURES l and 2. For this purpose they pass around guides at these corners the lower of which is shown as 22 and the upper as 23.
  • each apron also passes around an antifriction roller shown respectively as 24 and 25, the upper apron 6 passing directly back to its driving roller and the lower apron 7 passing around a further idler roller 26.
  • the rollers 24 and 26 turn in bearings formed in lugs 30 and 31 extending downwardly from the side plates 12.
  • the lower guide 22 forms a bridge member between the side plates 12 which are secured directly to it.
  • the bridge member is slightly convex upwardly so that the two aprons follow a slightly curved path and are consequently pressed together.
  • the pressure between them is augmented by a leaf spring 35 which bears against the lower run of the upper apron 6 and extends for rather more than half the length of the run.
  • the leaf spring 35 is secured to the plate 23.
  • the guide 23 is formed as an ofiset extension of a member 36 which is pivoted about the axle 21 of the upper roller 20.
  • the member 36 lies above the side plate 12 on one side of the apron 6 and the plate 23 extends downwardly and laterally from it so as to guide the upper apron as previously described.
  • the member 36 also carries a further leaf spring 37 which presses against the free end of the spring 35.
  • This latter spring is naturally straight and the action of the spring 37 is to cause the spring 35 to conform with the curvature of the bridge 22 and thus increase the downward pressure on the lower run of the upper apron 6.
  • the member 36 in its turn is loaded by means of a somewhat stouter leaf spring 40 which bears downwardly on a cross member 41 seen in FIGURE 4. This in its turn bears against a transverse portion 42 of the member 36 and as also seen from FIGURE 4 a single cross member 41 applies pressure to two adjacent units.
  • the downward pressure applied by the leaf spring 40 is transmit e directly to the upper apron at one end by the plate 23 and indirectly by the combination of the two further leaf springs 35 and 37, and at the same time pressure is also applied to the axle of the top apron driving roller.
  • Drafting apparatus for textile slivers comprising:
  • a pair of parallel side control surfaces extending along opposite sides of said aprons, the foreward ends of said surfaces being shaped to extend into and conform to the configuration of the nip of said drafting rollers, said control surfaces being spaced laterally from each other a distance substantially equal to the width of sliver being processed so as to engage the sliver on opposite sides thereof throughout its passage between said aprons and further between the ends of said aprons and the nip of said drafting rollers;
  • rollers being so positioned that the angle described by said aprons in passing around said guide members is between 30 and 2.
  • Drafting apparatus as defined by clainrl in which said lower guide member forms a bridge between said side control surfaces and a support for one of said aprons and in which said upper guide member is pivotally mounted and in which biasing means are provided to urge sai upper guide member toward said lower guide member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US103333A 1960-04-19 1961-04-17 Textile drafting apparatus Expired - Lifetime US3130454A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1367760A GB981371A (xx) 1960-04-19 1960-04-19

Publications (1)

Publication Number Publication Date
US3130454A true US3130454A (en) 1964-04-28

Family

ID=10027398

Family Applications (1)

Application Number Title Priority Date Filing Date
US103333A Expired - Lifetime US3130454A (en) 1960-04-19 1961-04-17 Textile drafting apparatus

Country Status (6)

Country Link
US (1) US3130454A (xx)
BE (1) BE602708A (xx)
CH (1) CH377239A (xx)
DE (1) DE1181595B (xx)
FR (1) FR1286464A (xx)
GB (1) GB981371A (xx)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942329A (en) * 1931-12-17 1934-01-02 Roller head with endless belts for
US2202755A (en) * 1938-01-20 1940-05-28 Mechanism for drawing textile
US2239863A (en) * 1937-10-23 1941-04-29 Spinnfaser Akt Ges Draw frame
GB620242A (en) * 1947-01-10 1949-03-22 Mackie & Sons Ltd J Improvements in self-threading delivery devices for drawing frames
US2484810A (en) * 1945-09-08 1949-10-18 Dayton Rubber Company Spinning apron
US2498364A (en) * 1947-06-03 1950-02-21 Arrangement for
US2813307A (en) * 1952-05-16 1957-11-19 Warner Swasey Co Drafting head
US2840860A (en) * 1953-03-20 1958-07-01 George F Raper Drafting slivers of fibrous materials
US2896269A (en) * 1953-01-19 1959-07-28 Gardella Adriano Multi-drawing frame particularly adapted for use on high-speed spinning frames

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1313164A (en) * 1919-08-12 Fernando casablancas
GB107928A (en) * 1916-10-26 1917-07-19 Fernando Casablancas Improvements in Mechanism for Drawing Fibres in Spinning an like Machines.
DE672760C (de) * 1937-07-08 1939-03-09 Kollnauer Baumwollspinnerei Un Streckwerk mit zwei zusammenarbeitenden endlosen Riemchen
FR967204A (fr) * 1947-06-03 1950-10-27 Douglas Fraser & Sons Ltd Perfectionnement aux dispositifs d'étirage et de retordage des matières fibreuses dans les métiers à filer
GB734951A (xx) * 1951-11-30 1900-01-01
DE953863C (de) * 1953-01-10 1956-12-06 Heinz Bade Doppelriemchen-Streckwerk fuer aus Bastfasern oder langen Blattfasern, insbesondere Jute, bestehende Faserbaender
DE1001931B (de) * 1954-06-23 1957-01-31 Michael Reiter Doppelriemchen-Streckwerk, insbesondere fuer lange Fasern
GB835300A (en) * 1957-05-02 1960-05-18 Casablancas High Draft Co Ltd Improvements in textile fibre drafting apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1942329A (en) * 1931-12-17 1934-01-02 Roller head with endless belts for
US2239863A (en) * 1937-10-23 1941-04-29 Spinnfaser Akt Ges Draw frame
US2202755A (en) * 1938-01-20 1940-05-28 Mechanism for drawing textile
US2484810A (en) * 1945-09-08 1949-10-18 Dayton Rubber Company Spinning apron
GB620242A (en) * 1947-01-10 1949-03-22 Mackie & Sons Ltd J Improvements in self-threading delivery devices for drawing frames
US2498364A (en) * 1947-06-03 1950-02-21 Arrangement for
US2813307A (en) * 1952-05-16 1957-11-19 Warner Swasey Co Drafting head
US2896269A (en) * 1953-01-19 1959-07-28 Gardella Adriano Multi-drawing frame particularly adapted for use on high-speed spinning frames
US2840860A (en) * 1953-03-20 1958-07-01 George F Raper Drafting slivers of fibrous materials

Also Published As

Publication number Publication date
DE1181595B (de) 1964-11-12
GB981371A (xx) 1965-01-27
FR1286464A (xx) 1962-01-22
BE602708A (fr) 1961-10-18
CH377239A (fr) 1964-04-30

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