US2955330A - Double-apron drafting mechanism - Google Patents

Double-apron drafting mechanism Download PDF

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Publication number
US2955330A
US2955330A US667781A US66778157A US2955330A US 2955330 A US2955330 A US 2955330A US 667781 A US667781 A US 667781A US 66778157 A US66778157 A US 66778157A US 2955330 A US2955330 A US 2955330A
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US
United States
Prior art keywords
apron
rollers
roller
drafting
fibres
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
US667781A
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English (en)
Inventor
Kraft Walter
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.)
SKF GmbH
Original Assignee
SKF Kugellagerfabriken GmbH
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 SKF Kugellagerfabriken GmbH filed Critical SKF Kugellagerfabriken GmbH
Application granted granted Critical
Publication of US2955330A publication Critical patent/US2955330A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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

Definitions

  • This is adjustable in such a manner that the aprons are deflected and, as a result thereof, a kink is formed in the aprons and provides a further rigid nip.
  • This plate is adjustable'accord- United States Patent ing to the fibre length so that the distance between two i of the nips can be varied. 7
  • a known drafting mechanism having a main and a preliminary drafting zone, is converted into a single-zone drafting mechanism simply by the useof longer aprons which run over the driving pair of feed rollers, the middle rollers and the apron bars, while the middle pair of rollers can be adapted to act either to give a drafting nip or merely to control and guide the aprons.
  • a further advantage of this invention consists in the fact that the distance between the middle rollers and the nips of the feed rollers and delivery rollers is variable so that adaptation to the particular length of fibre presents no' difiiculties. It is further convenient for the distance between the feed rollers and delivery rollers to nism having a main and I 11 and receive be adjustable so as to further extend the adjustment possibilities.
  • Fig. 1 is a view of a known double-apron drafting mechanism, shown partly cut away,
  • Fig. 2 is a view showing the drafting mechanism of Fig. I converted into a single-zone drafting mechanism in accordance with this invention.
  • Fig. 3 is a detail view of part of the drafting mechanism shown in Fig. 2, but on a larger scale.
  • a known drafting mechaa preliminary drafting zone by means of a bolt 3 and a 1 which extends through the whole machine.
  • a carrier arm 5 which consists of telescopic members of U-shaped cross-section and which can be locked, in the operating position, to the bracket 2, by a catch 7.
  • Mounted for pivoting or swinging on the carrier arm 5 are guide arms 8, 9 and).
  • the guide arms 8, 9 and 10 are loaded by helical springs the shafts of top rollers 15, 16 and 17 in holders 12, 13 and 14, respectively.
  • top apron cage 18 which serves to guide a top apron 19 and which includes an apron bar 181.
  • the apron 19 runs upon the middle top roller 16.
  • Bottom rollers 24, 25 and 26 are mounted for ro tation in brackets 21, 22 and 23, respectively, on the machine frame 20.
  • the brackets 21, 22 and 23 are relatively adjustable in the direction longitudinally of the travel of the fibres being drafted.
  • a bottom apron 27 runs upon the bottom middle roller 25 and over an apron bar 28, and is tensioned by a bar 29.
  • the known double-zone drafting mechanism described above with reference to Fig. 1 is converted, by minor reconstruction thereof, into a single-zone drafting mechanism capable of drafting fibres havinglengths up to the maximum distance between the rear feed rollers 15 and 24 and the front delivery rollers 17 and 26.
  • a long top apron 30 runs over the rear top feed roller 15, the middle top roller 16 and the apronbar 181 on the top apron cage 18, while a long bottom apron 31 runs over the rear bottom feed roller 24, the middle bottom roller 25 and the apron bar 28, and is tensioned by the bar 29.
  • the weighting spring 11 associated with arm 9 may be removed so that the middle top roller 16 only rests, with its own weight, on the apron 30 and thus serves merely as a control or apron-guiding roller during the drafting of long fibres.
  • a long-staple cage may be substituted for the short-staple cage 18 illustrated in Figs. 1 and 2.
  • the distance between the pair of middle rollers 16 and 25 and the pair of delivery rollers 17 and 26 will be increased.
  • the telescoping construction of the carrier frame 5 and the adjustability of the bearings 21, 22 and 23 in the frame 20 permit this substitution of the cage.
  • Long fibres will be drafted as described with reference to Fig. 2, that is, without the weighting spring 11, and with the top middle roller 16 merely serving as a control or apron-guiding roller.
  • the top middle roller 16 is weighted, by reinstalling the spring 11 associated with guide arm 9, so as to obtain 'a nip between rollers 16 and 25. The draft then takes place only between the pair of middle rollers 16 delivery rollers 17 and 26.
  • the choice of apron lengths and the choice between a short staple cage and a long staple cage for any particular machine are made in accordance with the character of the material which is to be drafted most often on that machine.
  • the arrangement with a shortstaple cage and an apron length which corresponds to the widest distance between the feed rollers and the delivery rollers is selected, but, when drafting fibres of medium and long length, a long-staple cage is used.
  • Another way of relieving the pressure of the top middle roller, so that it is used only as a control roller, is to substitute a roller having a smaller diameter for it, while the spring 11 acting on arm 9 is retained.
  • the guide arms 8, 9 and 10 are arranged so that they can swing down under the force of the weighting springs 11 only as far as a stop 60 and 60a, respectively, provided on the carrier arm 5. If the top middle roller 16 is removed, the holder 13 on the associated guide arm 9 will naturally come into a position closer to the plane of the drafting zone than when the original top middle roller of relatively large diameter is installed. Actually it will come into the position in which it rests against the stop on the carrier arm.
  • Fig. 3 illustrates, by way of example, howthe pres sure of the spring 11 against the middle guide arm 9 may be varied.
  • a set-screw 32 which carries a spring-retainer 33 at its lower end.
  • the pressure of the helical spring 11 on the middle guide arm 9 can be varied so that with high compression the spring 11, a nip is formed at the middle pair of rollers 16 and 25, but with moderate compression or complete release of the spring 11, the middle pair of rollers 16 and 25 act only as control and apron guiding rollers.
  • the setscrew 32 is secured against accidental turning and 25 and 'the 4 by a lock nut 34.
  • slots 36 and 35 are provided in the outer carrier arm 5 and in the middle telescoping member 52 to receive the upper portion 'of the set-screw 32.
  • a double-apron drafting mechanism for textile machines comprising a frame having bearings thereon rotatably supporting lower feed and delivery rollers and at least one lower middle roller disposed between said feed and delivery rollers, a carrier above said frame and carrying pivoted guide arms which rotatably support upper feed, delivery and middle rollers for movement toward and away from said lower feed, delivery and middle rollers, respectively, abutment means on said carrier for limiting pivotal movement of the guide arm carrying said upper middle roller in a direction toward said lower middle roller, said upper middle roller being replaceable by a middle roller of reduced diameter; an apron cage carried by the guide arm of said upper middle roller and defining an upper apron bar, a lower apron bar and tensioning bar, an upper apron running around said upper feed roller, tangentially over said upper middle roller, and around said upper apron bar, a lower apron running around said lower feed and delivery rollers and said lower apron bar and tensioning bar, means urging said upper feed and delivery roller

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US667781A 1956-06-25 1957-06-25 Double-apron drafting mechanism Expired - Lifetime US2955330A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2955330X 1956-06-25

Publications (1)

Publication Number Publication Date
US2955330A true US2955330A (en) 1960-10-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US667781A Expired - Lifetime US2955330A (en) 1956-06-25 1957-06-25 Double-apron drafting mechanism

Country Status (4)

Country Link
US (1) US2955330A (ru)
BE (1) BE557624A (ru)
FR (1) FR1176496A (ru)
GB (1) GB820239A (ru)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212139A (en) * 1961-06-29 1965-10-19 Skf Kugellagerfabriken Gmbh Drawing mechanism for a spinning machine
US3303534A (en) * 1963-08-21 1967-02-14 S O M Andreani & C Double apron drafting system for drawing frames
US3722036A (en) * 1970-03-04 1973-03-27 Kugellagerfab Gmbh Apparatus for mounting top rollers
CN104452005A (zh) * 2014-11-20 2015-03-25 南通金驰机电有限公司 Ab多色段彩控制传动装置及ab多色段彩纺纱工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH379985A (de) * 1960-04-29 1964-07-15 Rieter Ag Maschf Spinn- und Zwirnspindel

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB745127A (ru) *
FR880385A (fr) * 1941-05-14 1943-03-24 Sachsische Textilmaschinenfabr étireur pour filage en gros de peigné
US2677838A (en) * 1951-12-07 1954-05-11 Albert M Jouban Wringer mop
US2689383A (en) * 1951-06-11 1954-09-21 Saco Lowell Shops Drafting mechanism
GB718926A (en) * 1952-06-03 1954-11-24 Tmm Research Ltd Improvements in the drafting apparatus of textile spinning machines
US2751632A (en) * 1950-09-23 1956-06-26 Skf Kugellagerfabriken Gmbh Textile drawing mechanism
US2756462A (en) * 1952-11-07 1956-07-31 Saco Lowell Shops Drafting mechanism
US2760237A (en) * 1953-03-09 1956-08-28 Warner Swasey Co Vacuum draft control system for variable spinning

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB745127A (ru) *
FR880385A (fr) * 1941-05-14 1943-03-24 Sachsische Textilmaschinenfabr étireur pour filage en gros de peigné
US2751632A (en) * 1950-09-23 1956-06-26 Skf Kugellagerfabriken Gmbh Textile drawing mechanism
US2689383A (en) * 1951-06-11 1954-09-21 Saco Lowell Shops Drafting mechanism
US2677838A (en) * 1951-12-07 1954-05-11 Albert M Jouban Wringer mop
GB718926A (en) * 1952-06-03 1954-11-24 Tmm Research Ltd Improvements in the drafting apparatus of textile spinning machines
US2756462A (en) * 1952-11-07 1956-07-31 Saco Lowell Shops Drafting mechanism
US2760237A (en) * 1953-03-09 1956-08-28 Warner Swasey Co Vacuum draft control system for variable spinning

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212139A (en) * 1961-06-29 1965-10-19 Skf Kugellagerfabriken Gmbh Drawing mechanism for a spinning machine
US3303534A (en) * 1963-08-21 1967-02-14 S O M Andreani & C Double apron drafting system for drawing frames
US3722036A (en) * 1970-03-04 1973-03-27 Kugellagerfab Gmbh Apparatus for mounting top rollers
CN104452005A (zh) * 2014-11-20 2015-03-25 南通金驰机电有限公司 Ab多色段彩控制传动装置及ab多色段彩纺纱工艺

Also Published As

Publication number Publication date
GB820239A (ru) 1959-09-16
FR1176496A (ru) 1959-04-10
BE557624A (ru) 1960-03-11

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