US2689383A - Drafting mechanism - Google Patents

Drafting mechanism Download PDF

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Publication number
US2689383A
US2689383A US230986A US23098651A US2689383A US 2689383 A US2689383 A US 2689383A US 230986 A US230986 A US 230986A US 23098651 A US23098651 A US 23098651A US 2689383 A US2689383 A US 2689383A
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United States
Prior art keywords
apron
roll
supporting
rolls
overlying
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US230986A
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English (en)
Inventor
Virgil A Burnham
Andrew C Adams
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Saco Lowell Shops
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Saco Lowell Shops
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Publication date
Priority to GB740082D priority Critical patent/GB740082A/en
Priority to FR1062052D priority patent/FR1062052A/fr
Application filed by Saco Lowell Shops filed Critical Saco Lowell Shops
Priority to US230986A priority patent/US2689383A/en
Priority to ES0203771A priority patent/ES203771A1/es
Priority to DES28834A priority patent/DE960072C/de
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Publication of US2689383A publication Critical patent/US2689383A/en
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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

  • Thisinvention relates to textile fiber drafting mechanisms for'spinning androving frames, and more particularly to a novel textile draftingmechanism capable of drafting textile-fibers of widelyvarying lengths and characteristics, as well as mixtures of such widely varying fibers;
  • tin drafting elements employing a control zone having an' overlying roll :runningwithin the depressed curve of an apron in order properly to drive the apron to 7 provide the necessary unirorm i light frictional control throughout the entire control zone as well as to provide a control zone having a constant release point; it is desirableto have-the peripheral speedxofa"thegoverlying roll slightly higher (a: g.
  • apron drive havin relatively large apron contacting driving surfaces, as well as an apron driving nip between a pair of positively driven rolls.
  • Such an arrangement provides, due to the large area of contact of the apron with its driving rolls, a means of driving the apron at a substantially uniform speed to give improved drafting of fibers, without the necessity of excessive apron nipping pressures.
  • Fig. 1 is a cross-sectional side elevation of the drafting mechanism of the invention
  • Fig. 2 is a cross-sectional front elevation of a portion of the drafting mechanism of Fig. 1, taken on the line 2-2 of Fig. 1;
  • Fig. 3 is a plan view of certain portions of the drafting mechanism of Fig. 1;
  • Fig. 4 is a diagrammatic front elevation of the drafting mechanism of the invention.
  • Fig. 5 is a side elevation of a portion of the drafting mechanism of the invention.
  • Fig. 6 is a plan view of the portion of the draft ing mechanism shown in Fig. 5;
  • Fig. 7 is a cross-section taken on the line I! of Fig. 5; i
  • Fig. 8 is a cross-sectional side elevation of certain portions of the drafting mechanism of the invention.
  • Fig. 9 is anv isometric view of a portion of the drafting mechanism of the invention.
  • Fig. 10 shows a modified form of a portion of the drafting mechanism of the invention
  • Fig. 11 is a cross-sectional View of the modification of Fig. 10;
  • Fig. 12 shows in cross-section a roll portion of the drafting mechanism of the invention
  • Fig. 13 shows in cross-section a modified form of a roll portion of the drafting mechanism of the invention.
  • the textile fiber drafting mechanism of the invention includes a pair of delivery rolls 3 and 4 at its front end and a pair of holding rolls 5 and B at its back end, forming between said pairs a drafting zone.
  • the lower delivery roll 4 and the lower holding roll 6 extend for substantially the entire length of the machine and are driven in the customary manner by gearing located at the end of the spinning or roving frame.
  • the upper delivery rolls 3 and the upper holding rolls 5 are supported and weighted by any suitable means to act on a sliver to feed and draft it, the arrangement herein generally shown being that of Fig. 6 of V. A. Burnham et a1.
  • Such arrangement includes a weighting bar 1 on which said rolls 3 and 5 are mounted in bearings 8 and 9 respectively, said bearing 9 for the upper holding roll being mounted on said bar in adjustably fixed position so that, through set screw 10 therein, it may be adjusted along said bar to vary the spacing between said rolls. 3 and 5.
  • the rolls 3 and 5 are weighted from the cantilever arm l5 through a fulcrum member H mounted in adjustably fixed position on weighting bar 1, set screw l3 being provided so that said fulcrum member may be adjusted along bar 1, such mechanism being the subject of E. C. Gwaltney et al., U. S. Patent No. 2,565,228, filed September 3, 1948.
  • the cantilever arm I5 may be pressed down on fulcrum member I I to weight said rolls 3 and 5, said arm having a spring l1 operating on one end thereof yieldingly to press said arm downwardly against said member as more fully explained in said U. S. Patent No. 2,525,647.
  • the overall draft is produced by the difference in speed of the delivery rolls 3 and 4 as compared to that of the holding rolls 5 and 6, and we prefer that such draft be in the neighborhood of 15 to 20, although the preferred embodiment of the drafting mechanism of our invention will produce drafts which range from 5 to 50.
  • the lower rolls 4 and 6 are finely fluted and machined accurately, and the upper rolls are covered with an elastic material, such as synthetic rubber, of sufficient firmness to cooperate with the lower rolls to produce a dependable continuously uniform bite but still having sufiicient softness and elasticity to conform to variations in cross-sectional shape of the sliver being fed between them. More weight than that customarily used in drafting cotton should be applied to the top rolls 3 and 5 to prevent any appreciable slip between the sliver and the rolls.
  • Thefiber control mechanism is located between the delivery rollls and' the holding rolls and in' general includes an endless sliver supporting apron I2, and, withinthe loop of said apron a positively driven apron'supportingroll I 4 and an apron bar assembl-y including an apron bar I San-d supporting meanstherefor mounted in adjustably fixed' posit'ion between the apron supporting roll I Mfamr the delivery rolls 3 and '4; the apron being nipped-to drive-it between roll Iband 'a driving roll "fl outside the loop of the apron;
  • the apron- I 2 is further provided with*- anoverlying positively driven apron roll I 8-- depressing the apronforwardlywf apron supportingroll M' -and" rtating' with its adjacent surface moving in" the Harbor'rection as apron I2 at a; speed-slightly higher than
  • Such clearance permits :the sliver to enter anddeave the control zone without being I especiallm V shduld be heavily gripped at either' point; but rather it passes composition as shown in Fig. 12; such as natural orfsynthetic rubber of a durometer hardness, say from 50 to 100,,though of course it will be understood that the hardness of the boss may vary withinwide limits since the degree of grip required will vary with the'nature of the fibers of'thesliver and with the size of the sliver and the yarn. to be spun from it.
  • Such a boss is em ⁇ ployed in, conjunction withthe usual endless apron of a somewhat resilient synthetic materialoffclosely controlled uniform and predetermined? thickness.
  • a boss 2I ofsmoothsteel is suitable, as shown in Fig. 13.
  • a pin roll boss as shown inEifgs. lflfand 11,. in which the overlying apron contactingroll I8 is provided with a plurality of pins ,SDZextendihg outwardly from the peripheral surface of'the roll I8.
  • a pin roll it is. desirable. to provide an enlarged end portion 621cm. each endof the pin section, such end portion preferably being slightly larger in diameter than. the outcrdiameter of the pin section and servinglto contact the apron to keep it from contacting; the pins and being damaged thereby.
  • a roll apparently provides a limited combing; action which is desirable for certain types of fibers and mixtures thereof.
  • said drivingroll io beingalocatedr outside of' thew loop -of the aproml Zibeneatn :the apronisupp'orta ing' roll.
  • Weh-ave found that smooth metallic surfaces will serve for the-apron contacting portions 'of 'rolls I 4 and- 2 0- and are entirely suitable for"- nipping the apron to drive it; thoughfluted o1" knurled surfaces could of course-b'e usedr'
  • the roll I8 if driven faster than the' apron, thus aids in driving the apron by providingadditi'onal driv ing contact therewith; particularl since such roll? is driven at a speed slightly greater than that of the apron.
  • the above arrangement provides. the desirable uniform light frictional contact for the fibers of a sliver passing between the positively driven' overlying roll I8. and the apron I2even when the overlying roll is deeply depressed into the apron, so as toprovide the maximum control for the fibers of a sliver passing therethrough".
  • the apron rolls I4 and 20' drive theapron from immediatelybehind the slivers first contact with the control mechanism andfth'e overlying roll I8 'is driven at a slightly higher speed than the apron, the apron is carried, through the control zone aroundbverlyingroll' I8 as well as being pulled by the tension roll22 away from the apron bar end of said control zone.
  • our novel fiber control mechanism may be disassembled for cleaningor replacement'of aprons without disturbing such settings, the various elements being so supported and arranged auto,- matically to assume their prior settings when reassembled. :Such disassembly and'assembly, fur
  • thermore does not require the use of any tools whatsoever.
  • the'upper' rolls of the control mechanism areall relatively short individually driven rolls so that it is not necessary. to stop the entire frame-inorder'to clean orre .such a length being short enough to provide suitable gear drive for the said upper rolls, as well as to allow cleaning and replacement of elements without stopping the entire frame.
  • a lesser number of bosses could of course be used, but at increased expense per spindle in the number of gears required and the attendant cleaning problems without achieving any real advantage.
  • the upper delivery rolls 3 and upper holding rolls 5 are preferably of the usual two-boss type, as shown in U. S. Patent No. 2,525,647.
  • roll stands 24 at the ends of such rolls, the roll stands in our preferred embodiment being attached to the spinning or roving frame at distances suflicient to accommodate four drafting elements.
  • the roll stands 24 have tracks 25 on their upper surfaces, said tracks 25 serving adjustably to support from beneath each of the slides in which the various rolls and apron bars are supported, said slides including a lower delivery roll slide 26 for supporting the long lower delivery roll 4, a lower holding roll slide 28 for supporting the long lower holding roll 6, a slide 36 for supporting both the long apron driving roll 20 and the four boss apron rolls I4, and a slide 32 for supporting the short apron bars I6.
  • the slides 28, 30, and 32 are all mounted in said tracks in adjustably fixed position by suitable bolts 33 extending through said slides and said tracks and being retained by nuts 35 bearing against the lower surface of said tracks so that the distances between the elements supported in said slides may be varied.
  • Lower delivery roll slide 26 is fastened directly to stand 24 by a bolt 3! retained by a tapped hole in said stand.
  • the slides 26 and 28 for the lower delivery and holding rolls respectively are of the customary type for rotatively supporting a roll extending through them and may be supplied with antifriction bearingsas is well known in the art.
  • Slide which supports the control mechanism rolls, as best shown in Figs. 1, 2, 5, 6, '7, and 8, includes a bearing 36 extending entirely therethrough for supporting the long apron driving roll 20.
  • slots 38 On either side of said slide 30 are provided downwardly extending slots 38 adapted to support and retain the short apron supporting rolls I4 and yet permit them to move toward and away from the driving roll 20, said slots extend- 5 surface of the apron bar a suitable angle for suping from the upper portion of said slide into bearing 36.
  • the web 39 of said slide between said slots serves to prevent endwise movement both of said rolls I4 and of the overlying rolls I8, suitable shoulders being provided on said web.
  • the slide 32 provided for support of the apron bar I6, together called the apron bar assembly, as best shown in Figs. 8 and 9, has on either side thereof downwardly extending slots 40 to retain the apron bars I6 in a slanted position, said slots that of apron driving roll 20.
  • the four boss apron rolls I4 and I8 are geardriven by long apron driving roll 20, said apron driving roll 26 having at one end thereof between each pair of roll stands 24 a gear 44, said gear 44 serving positively to drive each four boss apron supporting roll I4 through a mating gear 41 on said roll l4 at a speed preferably the same as
  • Each apron supporting roll I4 in turn positively drives its overlying apron roll I8 through a gear 42 on the opposite end of said supporting roll from said gear 4I and a mating gear 43 on overlying roll I8, and we prefer that the bosses I9 of the overlying r011 I8 be driven at a peripheral speed of from about 3 to 6% more than that of said roll I 4.
  • each of said rolls is provided with a pair of bearings 45 on gudgeons on the ends thereof, the non-rotating elements of said bearings 45 being retained near the bottom of slots 38 of slides 36 by the yielding contact of roll I4 with apron I2 which apron in turn rests on apron driving roll 20.
  • apron driving roll 26 is driven at a peripheral speed of from 1 to 3 times that of the lower hold- 7
  • Overlying apron roll I8 is supported and spaced at the desired distance from the roll I4 by bearings 46 on gudgeons on the opposite ends thereof, the non-rotating elements of each of said bearings 46 being supported directly on and bridging between the slanted upper surface of the apron bar assembly and the stationary surface of the non-rotating element of a bearing 45 on apron supporting roll I4; such converging surfaces serving to support overlying roll I8 through its bearings 46 not only in regard to the pitch diameter of gears 42 and 43, but also with reference to the apron bar I6 and the apron supporting roll I4 to maintain said overlying roll normally slightly spaced at a uniform distance from said apron supporting roll and apron bar so as not to nip the apron at either, and to provide the desired light frictional contact for a sliver passin through
  • apron I2 between rolls I8 and I4 either with or without a positively driven overlying roll, the sliver in such case being nipped between overlying roll I8 and apron I2, to give a two zone drafting system, and under such circumstances the bearing 46 would not necessarily fix the normal spacing between rolls I4 and I8, although it would so operate between roll I8 and apron bar I6.
  • the bearings 45 and 46 on apron supporting roll I4 and overlying apron roll I6, though preferably of the antifriction type, may be of any material having low frictional characteristics, such materials as, for example, nylon or sintered metal being suitable.
  • the outer surface of the non-rotating bearing element is preferably 4
  • shoulder M9 is ,providednin, post .50 on slide I "for retainingsaid. spring in'a raisedinoperative .position out of:contact :withsaid bearings when so desired. .I'he.spring'm-also-serves to provide rectrelation zoftthe pitchcircles .of-igears and The overlying rolls l8 and the apronsupthe-spacingof-ian overlying roll it from a roll. t4
  • w the slides -28, .30 .-and 32 may. be ..mov,edalong-.the track .15 on roll stands 24.
  • apron roll I 8 brid es..-bet.ween .the. con- 1:10 i of: the apron bar-assembly until stopped. by con- -tact with the non-rotating' element of bearing on' apron supporting roll M. If less control is desired-the movement .of said slides 30 and.32 toward one another will raise roll 18 by rolling cbearingtfi up the slanted surface of said apron bar assembly Icy-contact with bearing 45 :and thus decrease the wrap of the apron 12' around said L11'O11.
  • overlying roll' i8 may be depressed into the apron to any desired extent with holding roll 5 adjusted (byureleasing-set screw ieran'd moving roll bearthe apron nipping ;-pressure between. apron su-pporting roll ltanddriving roll 20, .aprons of proper predetermined and uniform thickness "being employed to:- main-tain aapproximatelycorverging. surfaces .of lithe apron'fbar. assembly. .and V the non-rotatingbearing elements. of apron supporting roll .I 4 .and. thus is effect.
  • the roll is 'willalso automaticallyreturn to its previously set position, since the apron bar slide .-32 was .not moved during the disassembly and assembly and the slotsAO on said slide will retain the apron bar E6 in the same position relatively thereto.
  • a drafting mechanism of the character described having a drafting zone comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end, means supporting said rolls to act simultaneously on portions of a sliver spaced apart by a distance greater than theaverage fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver supporting apron, a positively driven apron supporting roll within the loop of and in contact with said apron for supporting and driving said apron, slide means supporting said apron supporting roll, an apron bar assembly including an apron bar and supporting slide means therefor, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron supporting roll slide and said apron
  • a drafting mechanism of the character de scribed having a drafting zone comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end, means supporting said rolls to act simultaneously onportions of a sliver spaced apart by a distance greater than the average fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver supporting apron, a positively driven apron supporting roll within the loop of and in contact with said apron for supporting and driving said apron, slide means supporting said apron supporting roll, an apron bar assembly including an apron bar and supporting slide means therefor, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron supporting roll slide and said
  • a drafting mechanism of the character described having a drafting zone comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end, means supporting said rolls to act simultaneously on portions of a sliver spaced apart by a distance greater than the average fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver supporting apron, a positively driven apron supporting roll having bearing means thereon, said roll being within the loop of and in contact with said apron for supporting and driving said apron, slide means supporting said apron supporting roll, an apron bar assembly including an apron bar and supporting slide means therefor, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron
  • a drafting mechanism of the character described having a drafting zone comprising a pair of delivery rolls at one end and a pair of holding rolls at its opposite end, means supporting said rolls to act simultaneously on portions of a sliver spaced apart by a distance greater than the average fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which raeaaees .13 a said ssliver is c hdrawni-zby said ideliverywrolls, 4 said rcontrolvmechanism including an endless looped underlying ..sliver flsupporting capron, .can apron asupporting roll partially encircled within a rearaward loop-errand .in contact withi said apronfor driven apron-udriving roll :outside .and below the said rearward loop of said apro
  • a draiting mechanism of' the characterrdeascribed having a drafting zone comprising awpair fielivery rolls-at oneendanda pair oi holding rolls ata its opposite end, means supporting said i rolls -to act simultaneously on portions or" .
  • a i sliver spaced: apart by a' distance greater than the average fiber length oi-"the sliver to feed and draft it, mechanismfor revolving said rolls at the speeds "necessary to produce (the desired "draft; and :a rotary ifiber control mechanism mounted between '--'sald pairs of rollsan'd' through which said sliver is drawn by said delivery rolls, said-control mech- "anism including an endless loopedmriderlying "sliver-supporting apron, an apron supporting roll partially encircled within: a rearward
  • .18 A draftingcmechanism. of; the ,characteridescribediihavmgiadrafting zonejcomprisiniaipair 5 *of delivery: rolls at oneendaand'aspair of holding anangulamdistance inexcess ofw90., a positively rollsnatn its opposite: end,:meanssupporting-said "rolls toxxact simultaneously on'portions of Ira; sliver spaced apart by iardistances'greaterzthanthezaver- "ageifiherslength ofthe sliver to feed and .idraft at,
  • control'mechanism including 1 an --endless looped "underlying sliver-supporting apron, an apron bar within the *loop of said apron in contact with *saidpapron,
  • Aflrdftingmechanism of the characteridescribed "having a drafting; zone comprising aypair otfdlivery. rolls at one end and a .pairof holding rollsat its opposite end, means supporting said rolls to actsimultaneously. on portions of 14,liver -spacedapart by a distance'greater than 'the'average fiber length of the sliver tofeed and draft it; mechanism for revolving said r'ollstat 'the speeds-necessary'to produce the desired'draft, and
  • a drafting mechanism of the character described having a drafting zone comprising a pair of delivery rolls at one end and a pair of holding rolls at its opposite end, means supporting said rolls to act simultaneously on portions of a sliver spaced apart by a distance greater than the average fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver supporting apron, an apron bar assembly including an apron bar and supporting means therefor within the loop of said apron in contact with said apron, a positively driven apron driving roll oustide and below a rearward loop of said apron in contact with said apron immediately in advance of and guiding it to said loop,
  • a positively driven apron supporting roll partially encircled within said rearward loop of and in contact with said apron for an angular distance in excess of 90 and, forming with said apron driving roll an apron driving nip for driving said apron,
  • said supporting roll being supported by said drivingroll, gears for driving said supporting roll from said driving roll, an overlying positively driven apron roll outside the loop of and depressing said apron forwardly of said apron supporting roll, said roll being supported for rotation by means of said apron bar assembly and said apron supporting roll with its vertical level adjustably fixed by the horiozntal spacing therebetween, and gears for driving said overlying apron roll from said apron driving roll.
  • a drafting mechanism of the character described having a drafting zone comprising a pair of delivery rolls at one end and a pair of holding 16 rolls at its opposite end, means supporting said rolls to act simultaneously on portions of a sliver spaced apart by a distance greater than the average fiber length of the sliver to feed and draft it, mechanism for revolving said rolls at the speeds necessary to produce the desired draft, and a rotary fiber control mechanism mounted between said pairs of rolls and through which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver supporting apron, an apron bar assembly including an apron bar and supporting means therefor within the loop of said apron in contact with said apron, a positively driven apron driving roll outside and below a rearward loop of said apron in contact with said apron immediately in advance of and guiding it to said loop, a positively driven apron supporting roll having bearing means thereon said roll being partially encircled within the said
  • a drafting mechanism as claimed in claim 12 including means acting on said overlying roll urging said overlying roll and said apron supporting roll downwardly toward said apron driving roll to nip said apron between said apron supporting roll and said apron driving roll.
  • a drafting mechanism comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end with a rotary fiber control mechanism therebetween, said control mechanism including an endless looped underlying sliver supporting apron and a positively driven apron supporting roll within the loop of and in contact with said apron for supporting and driving said apron, slide means supporting said apron supporting roll, an apron bar assembly includingan apron bar and supporting slide means therefor, said apron bar being within the loop of said apron in contact with said apron,
  • track means supporting said apron supporting roll slide and said apron bar slide in adjustably fixed position for adjustment of each of said slides to vary the horizontal spacing of said apron bar and said apron supporting roll from each other as well as independently to vary the horizontal spacing of either said roll or said apron bar from said delivery rolls, and an overlying apron roll outside the loop of and contacting said apron adjacent said apron supporting rolls.
  • a drafting mechanism comprising a pair of weighted delivery rolls at the forward end and a rotary fiber control mechanism mounted rearwardly thereof, saidcontrol mechanism including anv endless looped underlying sliver-supporting apron and an externally weighted readily removable apron-supporting roll within the loop of and.
  • apron bar assembly including an apron bar and supporting means therefor, said apron bar being within the loop of said apron in contact with said apron near said delivery rolls, a base supporting said apron supporting roll slide in adjustably fixed position for adjustment to vary the horizontal spacing of said apron bar and said apron supporting roll from each other as well as to vary the horizontal spacing of said apronsupporting roll from said delivery rolls, and an overlying apron roll outside the loop of and contacting said apron to press sliver down upon said apron adjacent said apron supporting roll.
  • a drafting mechanism as claimed in claim 16 in which said overlying apron roll isyieldably weighted by weighting means carried by said slide means supporting said apron-supporting roll.
  • a drafting mechanism of the character described having a drafting zone greater in length than the average fiber length of the sliver with a pair of delivery rolls at the forward end of said zone, mechanism for revolving s'aid rolls at a speed necessary to produce the desired draft, a rotary fiber control mechanism mounted rearwardly of said delivery rolls and from which said sliver is drawn by said delivery rolls, said control mechanism including an endless looped underlying sliver-supporting apron, an apron bar within a forward portion of the loop of and in contact with said apron adjacent said delivery rolls, a yieldably mounted readily removable apron-supporting roll partially encircled within a rearward portion of the loop and in contact with said apron for an angular distance in excess of 90, a positively driven apron-driving roll outside and below the said rearward portion of the loop of the said apron in contact with said apron immediately in advance of and guiding it to said loop portion and cooperating with said a
  • a drafting mechanism as claimed in claim 18 wherein said overlying apron-contacting roll is mounted, weighted, and arranged to nip the apron between it and said apron-supporting roll.
  • a drafting mechanism of the character described having a drafting zone greater in length than the average fiber length of the sliver with a pair of weighted delivery rolls at the forward end of said zone, mechanism for revolving said rolls at a speed necessary to produce the desired draft, a rotary fiber control mechanism mounted rearwardly of said delivery rolls and from which ing roll to provide of and contacting said apron to press sliver d I8 said sliver is drawn.
  • said control mechanism including an endless looped underlying sliver-supporting apron, an apron bar within a forward portion of the loop of and in contact with saidapron adjacent said delivery rolls, a yieldably mounted readily removable apron supporting rollpartially encircled within a rearward portion ofthe loop of and in contact with said apron for an angular distance in excessof 90.”, a positively driven aprong driving roll outside and below the said rearward portion of the loop of the said: apron in contact with said apron immediately in advance of and guiding it to said: loop portion and cooperating with said apron supporting roll to drive said apron, an apron-tensioning roll tensioning and contacting said apron between said apron bar and said apron driving roll, a base-supported mounting means for said apron supporting and apron driving rolls, said meansrotatively supporting said apron supporting roll for movement toward and away from said
  • releasable weighting means pressing downwardly said apron-supporting roll for normally maintaining the said nip of said apron, and an overlying apron-contacting means outside the loop of and in contact with the upper surface of said apron for pressing the sliver downwardly into engagement with said apron.
  • a drafting mechanism comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end with a rotary fiber control mechanism therebetween, said control mechanism including an endless looped underlying sliver supporting apron and an apron supporting roll Within the loop of and in contact with said apron for supporting said apron, slide means supporting said apron supporting roll, an apron bar assembly positioned between said apron supporting roll and said delivery rolls, said assembly including an apron bar and supporting means therefor, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron supporting roll slide in adjustably fixed position for adjustment of said slide to vary the horizontal spacing between said apron bar and said apron supporting roll as well as to vary the horizontal spacing of said apron supporting roll from elivery rolls, and an overlying apron roll outside tile p upon said apron adjacent said apron.
  • a drafting mechanism comprising a pair of delivery rolls at the forward end and a pair of holding rolls at its opposite end with a rotary fiber control mechanism therebetween, said control mechanism including an endless looped underlying silver supporting apron and an apron supporting roll within the loop of and in contact with said apron for supporting said apron, slide means supporting said apron supporting roll, apron bar assembly positioned between said apron supporting roll and said delivery rolls, said assembly including an apron bar and supporting means therefor with said assembly presenting a downwardly and rearwardly slanted surface converging downwardly with a surface of said apron supporting roll, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron supporting roll slide in adjustably fixed position for adjustment of said slide to vary the horizontal spacing between said apron bar and said apron supporting roll as well as to vary the horizontal spacing of said apron supporting roll from said delivery rolls,
  • a drafting mechanism comprising a. pair of delivery rolls at the forward end and a pair of holding rolls at itsopposite end with a rotary fiber control mechanism therebetween, said control mechanism including an endless looped underlying sliver supporting apron and an apron supporting roll having bearing means thereon, said roll being within the loop of and in contact with said apron for supporting said apron, slide means supporting said apron supporting roll, an apron bar assembly positioned between said apron supporting roll and said delivery rolls, said assembly including an apron bar and supporting means therefor with said assembly presenting a downwardly and rearwardly slanted surface conapron supporting roll bearing means, said apron bar being within the loop of said apron in contact with said apron, track means supporting said apron supporting roll slide in adjustably fixed position for adjustment of said slide to vary the horizontal spacing between said apron bar and said apron supporting roll as Well as to vary the horizontal spacing of said apron supporting

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  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US230986A 1951-06-11 1951-06-11 Drafting mechanism Expired - Lifetime US2689383A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB740082D GB740082A (US08177716-20120515-C00003.png) 1951-06-11
FR1062052D FR1062052A (US08177716-20120515-C00003.png) 1951-06-11
US230986A US2689383A (en) 1951-06-11 1951-06-11 Drafting mechanism
ES0203771A ES203771A1 (es) 1951-06-11 1952-05-30 PERFECCIONAMIENTOS EN LOS MACANISMOS PARA EL ESTIRADO DE FIBRAS TEXTILES EN MáQUINAS DE HILAR Y EN MECHERAS DE AFINO
DES28834A DE960072C (de) 1951-06-11 1952-06-07 Unterriemchen-Streckwerk fuer Spinn- und Vorspinnmaschinen

Applications Claiming Priority (2)

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US960072XA 1951-06-11 1951-06-11
US230986A US2689383A (en) 1951-06-11 1951-06-11 Drafting mechanism

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US2689383A true US2689383A (en) 1954-09-21

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US230986A Expired - Lifetime US2689383A (en) 1951-06-11 1951-06-11 Drafting mechanism

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US (1) US2689383A (US08177716-20120515-C00003.png)
DE (1) DE960072C (US08177716-20120515-C00003.png)
FR (1) FR1062052A (US08177716-20120515-C00003.png)
GB (1) GB740082A (US08177716-20120515-C00003.png)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029716B (de) * 1955-02-22 1958-05-08 Spinnereimaschb Ingolstadt Nie Wendeschiene fuer Streckwerke fuer Spinnmaschinen mit kurzen Unterriemchen
US2955330A (en) * 1956-06-25 1960-10-11 Skf Kugellagerfabriken Gmbh Double-apron drafting mechanism
US3205539A (en) * 1961-05-13 1965-09-14 Skf Kugellagerfabriken Gmbh Textile drawing mechanism
US4969238A (en) * 1988-11-05 1990-11-13 Zinser Textilmaschinen Gmbh Apparatus for selectively securing a carrier member of a textile drafting apparatus
US11879186B2 (en) * 2018-05-24 2024-01-23 Saurer Spinning Solutions Gmbh & Co. Kg Drafting system and drafting system unit for a spinning machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261043A (US08177716-20120515-C00003.png) * 1900-01-01
US2141219A (en) * 1936-05-11 1938-12-27 H & B American Machine Company Drafting mechanism
US2182695A (en) * 1937-02-16 1939-12-05 Honda Kikutaro Spinning frame
US2471056A (en) * 1946-02-02 1949-05-24 Collins & Aikman Corp Apparatus for drafting textile fibers
US2471057A (en) * 1945-12-18 1949-05-24 Collins & Aikman Corp Method and apparatus for drafting textile fibers
US2588420A (en) * 1948-08-18 1952-03-11 Saco Lowell Shops Textile drafting mechanism
US2607083A (en) * 1948-11-17 1952-08-19 Collins & Aikman Corp Textile fiber drafting frame

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH116569A (fr) * 1925-09-07 1926-09-01 Le Blan & Cie Dispositif étireur pour machines préparatoires et machines à filer le coton.
DE700414C (de) * 1937-11-28 1940-12-19 Ver Kugellagerfabriken Akt Ges Durchzugstreckwerk fuer Spinnereimaschinen
US2233963A (en) * 1938-06-13 1941-03-04 Saco Lowell Shops Drawing mechanism for textile fibers
DE703482C (de) * 1938-06-15 1941-03-10 Ver Kugellagerfabriken Akt Ges Lieferwalze fuer Spinnereimaschinen
US2329655A (en) * 1941-02-17 1943-09-14 Saco Lowell Shops Drafting mechanism for spinning and roving frames
US2430611A (en) * 1945-03-17 1947-11-11 Saco Lowell Shops Drawing mechanism for spinning and roving frames
US2430706A (en) * 1946-01-25 1947-11-11 Saco Lowell Shops Top roll weighting mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261043A (US08177716-20120515-C00003.png) * 1900-01-01
US2141219A (en) * 1936-05-11 1938-12-27 H & B American Machine Company Drafting mechanism
US2182695A (en) * 1937-02-16 1939-12-05 Honda Kikutaro Spinning frame
US2471057A (en) * 1945-12-18 1949-05-24 Collins & Aikman Corp Method and apparatus for drafting textile fibers
US2471056A (en) * 1946-02-02 1949-05-24 Collins & Aikman Corp Apparatus for drafting textile fibers
US2588420A (en) * 1948-08-18 1952-03-11 Saco Lowell Shops Textile drafting mechanism
US2607083A (en) * 1948-11-17 1952-08-19 Collins & Aikman Corp Textile fiber drafting frame

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1029716B (de) * 1955-02-22 1958-05-08 Spinnereimaschb Ingolstadt Nie Wendeschiene fuer Streckwerke fuer Spinnmaschinen mit kurzen Unterriemchen
US2955330A (en) * 1956-06-25 1960-10-11 Skf Kugellagerfabriken Gmbh Double-apron drafting mechanism
US3205539A (en) * 1961-05-13 1965-09-14 Skf Kugellagerfabriken Gmbh Textile drawing mechanism
US4969238A (en) * 1988-11-05 1990-11-13 Zinser Textilmaschinen Gmbh Apparatus for selectively securing a carrier member of a textile drafting apparatus
US11879186B2 (en) * 2018-05-24 2024-01-23 Saurer Spinning Solutions Gmbh & Co. Kg Drafting system and drafting system unit for a spinning machine

Also Published As

Publication number Publication date
GB740082A (US08177716-20120515-C00003.png)
DE960072C (de) 1957-03-14
FR1062052A (US08177716-20120515-C00003.png)

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