US3029479A - Drafting mechanism - Google Patents

Drafting mechanism Download PDF

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Publication number
US3029479A
US3029479A US60892A US6089260A US3029479A US 3029479 A US3029479 A US 3029479A US 60892 A US60892 A US 60892A US 6089260 A US6089260 A US 6089260A US 3029479 A US3029479 A US 3029479A
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US
United States
Prior art keywords
roll
apron
aprons
overlying
cradle
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
US60892A
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English (en)
Inventor
Philip B Tarbox
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.)
Saco Lowell Shops
Original Assignee
Saco Lowell Shops
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 Saco Lowell Shops filed Critical Saco Lowell Shops
Priority to US60892A priority Critical patent/US3029479A/en
Priority to GB998738D priority patent/GB998738A/en
Priority to DES76141A priority patent/DE1185960B/de
Application granted granted Critical
Publication of US3029479A publication Critical patent/US3029479A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 mechanisms of the type used on spinning and roving frames and the like, and more particularly to novel front roll positioning structures for the upper drafting elements of drafting mechanisms of the type wherein a short upper apron cooperates to perform the drafting function with a long lower apron having an apron supporting roll and apron bar within its loop.
  • cap bar supported front top roll is desirable because of the simple nature of the roll which may thereby be employed. More specifically, if a front top roll can be supported in cap bars by the use of arbors at its ends, rather than being supported centrally thereof between its bosses, a one piece roll structure may be employed wherein all anti-friction bearings are eliminated to produce not only a less expensive roll but a roll made more reliable as well by the elimination of bearing failures.
  • cap bar structures have to do with the piecing up operation wherein from time to time in the use of the spinning frame, a yarn breakage must be remedied by piecing together the broken ends of yarn.
  • the conventional cap bar structure such is diflicult to accomplish because the cap bars prevent access to the apron fiber control mechanism, making it necessary to piece up at the front roll. But this is not entirely satisfactory since the speed of the front roll is 10 to times that of the apron control mechanism, so that great skill is necessary successfully to piece up a broken yarn.
  • the present invention is directed to a novel positioning and supporting structure for the front top roll of drafting elements of the short apron type so that alignment of the front top roll is readily maintained and piecing up may be accomplished at the apron fiber control mechanism.
  • the apparatus provided is readily adapted for use on spinning or roving frames having a long lower apron structure including a lower apron bar, such bar providing the alignment and support for the top rolls of the structure.
  • FIG. 1 is a view mainly in vertical section showing a drafting mechanism embodying a preferred embodiment of this invention.
  • FIG. 2 is a plan view of the mechanism shown in FIG. 1.
  • the drafting mechanism of Patented Apr. 17, 1962 in general includes a pair of front or delivery rolls, an intermediate fiber control mechanism for feeding and controlling a strand of discontinuous fibers such as cotton, roving or sliver, and behind the fiber control mechanism, a pair of holding rolls.
  • the fiber control mechanism itself includes, as a lower unit, an endless underlying fiber supporting lower apron 20 having within its loop a lower apron driving roll 22, an apron bar 24 forward of said apron driving roll and an apron tensioning roll 28 suitably mounted beneath said apron bar 24 and apron driving roll 22.
  • Its upper unit includes an apron cradle having side members '40 and a tensor 42 extending therebetween, said cradle mounting and positioning an overlying roll 6.
  • An overlying short apron 30 encircles said roll and tensor.
  • the lower rolls, delivery roll 12, holding roll 16 and lower apron driving roll 22, extend for the entire length of the spinning frame and are driven by gearing located in the ends thereof.
  • top rolls, front or delivery roll 4, overlying apron roll 6 and holding roll 8 are all generally similar, being of the type employing two bosses with a pair of cots or short aprons cooperating therewith, one of said cots or aprons encircling each boss of said roll and, in the case of the aprons, the tensor 42 as well, to cooperate with a pair of lower aprons 20 therebeneath.
  • These rolls also include a permanent magnet housed therewithin which cooperates with the bottom roll of ferromagnetic material. This provides the necessary weighting of the drafting elements. More specifically, a preferred roll is that disclosed in application Serial No.
  • top roll comprises a shell of non-magnetic material which is adapted to receive a permanent magnet and the two end pieces which are adapted to be press-fitted into the cooperating end portions of the shell such that they abut the magnet.
  • the end pieces have an arbor extending outwardly of the flange.
  • the bottom roll may also include permanent magnet materials therein and may act either in conjunction with a permanent magnetic top roll or not depending on the weighting and degree of driving force required.
  • the top delivery or front roll 4 includes pairs of bosses 14 and arbors 15 and the top holding roll 8 pairs of bosses 18 and arbors 19.
  • the two bosses 34 of the top control roll 6 have arbors 36 which are positioned at each end thereof by suitable bearing recesses 44 in apron side cradle members 40.
  • the short upper apron 30 overlies the lower apron 20 to cooperate therewith to control a strand as it passes between the aprons, both of the aprons being nipped to drive them between the apron driving roll 22 and the overlying upper roll bosses 34.
  • the apron cradle includes side members 40 spaced to fit adjacent the sides of a boss 34 to limit lateral movement of the roll and an apron tensor 42 having a rounded forward apron engaging edge extends between said side members at the forward portion of the cradle inside the loop of upper apron 30, the tensor normally being positioned above apron bar 24 and being the sole transverse structural member extending between said side pieces.
  • the cradle together with boss 34 on said overlying roll supports and guides the upper apron 30, the side members of the cradle also functioning to guide the apron 30 to prevent lateral movement thereof with respect to the cradle.
  • the apron cradle is supported and aligned by apron bar locating means.
  • legs 46 are provided on each side member 40, such legs being spaced outwardly from the inner surface of said side members to provide lateral clearance for both the upper and lower aprons.
  • the legs 46 extend downwardly from said side members and are received in a pair of cooperating recesses 26 in the rear face of apron bar 24 to provide an accurately determined and fixed lateral position of the cradle relative to the apron bar while at the same time permitting the cradle to be removed simply by lifting it backwardly and upwardly with apron 30 and the upper roll 6.
  • a suitable means such as a machine screw 49 is mounted on the apron bar between the roll bosses with the head thereof extending upwardly.
  • the present invention concerns a novel front top roll mounting structure and is an improvement over that shown and described in application Serial No. 828,247, filed July 20, 1959.
  • the arbors on the end of the front roll were mounted in bearing members which were in turn mounted on the apron bar.
  • Such structure although satisfactory from the standpoint of front roll alignment, was difficult to piece up because such had to be done at the front roll.
  • piecing up at the apron fiber control mechanism is made possible by supporting the front roll arbors by means mounted on the cradle tensor generally centrally thereof between the upper aprons and extending laterally across the bosses of the front roll and the apron roll.
  • the front roll support means includes a pair of generally U-shaped members generally designated 50, each being rigidly mounted on the apron tensor 42 generally centrally thereof between bosses 34, in side by side relationship but spaced as far as possible from one another for optimum alignment, by means of suitable screws 53 in inwardly extending lugs 52 at the free end of the inner leg 54 of said U-shaped member 50.
  • the free end of the outer leg 58 of said U-shaped member 50 is provided with a bearing recess 60 open at its upper side to receive the arbor 15 of the front roll 4.
  • an end wall 62 is provided at the outer end of bearing recess 60 lateral- 1y to position front roll 4 by contact of the ends of its arbors 15 with the inner surfaces of said walls.
  • each of said supporting members 50 extends perpendicularly to legs 54 and 58 therebetween and laterally between the overlying apron roll 6 and the front roll 4 generally parallel thereto.
  • the legs 54 and 58 thereof extending outwardly and upwardly relatively to the axes of the front top roll 4 and tensor 42, such base portion 64 is positioned well outside of and spaced from the plane of the axes of the front and apron top rolls, generally in a plane tangent to the upper surfaces of said rolls so that such rolls may be as close together as may be desired for fiber control.
  • the legs 54 and 58 are at an acute angle to one another, herein shown as about 60 degrees, to position base portion 64 generally midway between the two rolls 4 and 6 so that it may be close thereto, as is desirable.
  • the pair of support members 50 are interconnected by a cylindrical reinforcement rod 66 extending along, between and through the base portions 64 of said members 50 therebetween generally in the tangent plane midway between the rolls 4 and 6.
  • the members 50 themselves are preferably of magnetically insulating material, such as nylon, so that an undesired flux path will not be provided, as well as to provide a suitable bearing for arbors 15.
  • the front top roll 4 as well as the overlying apron roll 6 is positioned solely with reference to the apron bar and the underlying rolls, with the overlying apron roll 6 and front roll 4 being positively maintained parallel to one another by virtue of the mounting of the front top roll arbors on the apron tensor 42 which also, through the cradle side members 40, mounts the overlying apron roll 6.
  • the front roll may readily be removed either by itself or with the entire upper apron assembly which may easily be lifted out of the frame to facilitate cleaning or changing of aprons without stopping other por tions of the spinning frame.
  • the aprons, cradles and their overlying rolls, comprising the upper apron assembly may be taken apart by first tightening aprons 313 sufficiently to allow arbors 36 to be sprung out of recesses 44, then sliding both the cradle and the aprons lengthwise of the upper roll over the bosses 34 to remove the aprons 3i and cradle from the roll and finally sliding the cradle out of the loop of the aprons.
  • the invention provides a novel front top roll cooperating with a short upper apron assembly to make possible piecing up around the ends of the front rolls.
  • a drafting mechanism of the character described including a plurality of sets of devices for feeding and controlling a strand of discontinuous fibers, said sets being arranged one in advance of the other to act successively on a strand, the front set of said devices comprising a bottom roll and an overlying top roll having a pair of axially spaced bosses with arbors on the ends of said top roll beyond said bosses and another set of said devices rearwardly thereof comprising a pair of endless underlying strand supporting lower aprons each having within its loop a lower apron driving roll, an apron bar forward of said apron driving roll and an apron tensioning roll below said apron driving roll, and a pair of endless overlying aprons mounted above and contacting said lower aprons and having within their loops an overlying apron roll having pairs of spaced bosses and an apron cradle assembly including a tensor member forward of said overlying apron roll extending throughout
  • a drafting mechanism of the character described including a plurality of sets of devices for feeding and controlling a strand of discontinuous fibers, said sets being arranged one in advance of the other to act successively on a strand, the front set of said devices comprising a bottom roll and an overlying top roll having a pair of axially spaced bosses with arbors on the ends of said top roll beyond said bosses and another set of said devices rearwardly thereof comprising a pair of endless underlying strand supporting lower aprons each having within its loop a lower apron driving roll, an apron bar forward of said apron driving roll and an apron tensioning roll below said apron driving roll, and a pair of endless overlying aprons mounted above and contacting said lower aprons and having within their loops an overlying apron roll having pairs of spaced bosses and an apron cradle assembly including a tensor member forward of said overlying apron roll extending throughout
  • a drafting mechanism of the character described including front, middle and rear sets of devices for feeding and controlling a strand of discontinuous fibers, said sets being arranged one in advance of the other to act successively on a strand, the front set of said devices comprising a bottom roll and an overlying top roll having a pair of axially spaced bosses with arbors on the ends of said top roll beyond said bosses and the middle set of said devices comprising a pair of endless underlying strand supporting lower aprons each having within its loop a lower apron driving roll, an apron bar forward of said apron driving roll and an apron tensioning roll below said apron driving roll, and a pair of endless overlying aprons mounted above and contacting said lower aprons and having within their loops an overlying apron roll having pairs of spaced bosses and an apron cradle assembly including a tensor member forward of said overlying apron roll extending throughout the length of

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US60892A 1960-10-06 1960-10-06 Drafting mechanism Expired - Lifetime US3029479A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US60892A US3029479A (en) 1960-10-06 1960-10-06 Drafting mechanism
GB998738D GB998738A (de) 1960-10-06 1961-10-04
DES76141A DE1185960B (de) 1960-10-06 1961-10-04 Doppelriemchenstreckwerk fuer Spinnmaschinen mit magnetisch belasteten Oberwalzen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US60892A US3029479A (en) 1960-10-06 1960-10-06 Drafting mechanism

Publications (1)

Publication Number Publication Date
US3029479A true US3029479A (en) 1962-04-17

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ID=22032387

Family Applications (1)

Application Number Title Priority Date Filing Date
US60892A Expired - Lifetime US3029479A (en) 1960-10-06 1960-10-06 Drafting mechanism

Country Status (3)

Country Link
US (1) US3029479A (de)
DE (1) DE1185960B (de)
GB (1) GB998738A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller
CN103374771A (zh) * 2012-04-25 2013-10-30 立达英格尔施塔特有限公司 包含至少一个具有多个磁性区域的负载辊的纺织机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932067A (en) * 1947-04-05 1960-04-12 Arakawa Naoji Draft device of a spinning machine
DE842918C (de) * 1948-10-02 1952-07-03 Suedd Spindelwerke Zinser Streckwerk fuer Spinnmaschinen
DE969679C (de) * 1949-01-01 1958-07-03 F A Kuempers K G Riemchen-Streckwerk
US2927348A (en) * 1955-09-22 1960-03-08 Saco Lowell Shops Textile drafting mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448803A (en) * 1994-03-17 1995-09-12 Hollingsworth Saco Lowell, Inc. Magnetic roller
CN103374771A (zh) * 2012-04-25 2013-10-30 立达英格尔施塔特有限公司 包含至少一个具有多个磁性区域的负载辊的纺织机
CN103374771B (zh) * 2012-04-25 2017-06-23 立达英格尔施塔特有限公司 包含至少一个具有多个磁性区域的负载辊的纺织机

Also Published As

Publication number Publication date
GB998738A (de) 1965-07-21
DE1185960B (de) 1965-01-21

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