US1222776A - Method of and apparatus for straightening weft-threads. - Google Patents

Description

JOHN LOWE AND JOHN J. DYTH, 'or VALLEYFIELD, QUEBEC; CANADA.

METHOD OF AND APPARATUS FOR STRAIGHTENING WEET-THREADS.

To all 'whomJ z't may concern: y

Ile it known 'that We, `Jol-IN LOWE .andi

JoLrN'J. LYTH, both subjects of the King of Great Britain, and residents of the city of iValleyfield in the Proyince of Quebec and Dominion of Canada, have inventedcertain new and useful Improvements in Methods of and l'-\.p1.)aratus for Straighteninglveft- Threads, of which the following is a full, clear, and exact description.

This invention relates to improvenlents in method of and apparatus for straightening the weft threads of woven fabrics, and the Object of the invention is to provide means for bringing the two ends of each thread into a line extending across the cloth at right angles to the selvages.

-lVhen the fabric leaves the loom, the Warp and weft threads are exactly at right angles to one another and the effect is very leasing. After the cloth has been.. subjected to various processes and is about to be rolled for shipment, it is :found that the handling of the'cloth has distorted and tvvisted the weft threads out of theiroriginal line; The Warp threads are practically unaffected, as in themarious processes. the tension of the cloth is always in longitudinal direction.

[the weft threads, but,l cannotrestore. them "to, the proper angular relation with the warp threads; so that in'thefinished cloth the wveft, threads lie "in 'a diagonal direction.

produciligx"unsatistactoryl and unsightly cloths'` Various methods and apparatus have been `tried out to"overcome this ditiiculty. but vWith-out `any great measure. of success.

It. isob'vioi'rsthat to produce the desiredfresult. onel'ed'geot the Vcloth must be advanced more rapidlyffthan the other; and this -adyancementmust be purely local in order that properly disposed threads in adjoin. ingfportions \of'tl1e fabric `shallV not be dis! `placed.

. Specification of vLetters Pate-nt.

Various machines have been, devised for straightening the Wett 'threads Certain of these P atented Apr, 157.1917.

Application mea `mmh 21, i916. serial No. 85,6 so.

lVe have discovered that by passing the cloth -over -a series.V of rolls adjust'ably mounted so that. they be jfor'med rough y' vinto a c one or pyramid,the' edge of the vcloth at the base'ofthe pyramid will be advanced more rapidly thanthattovvard the apex, orin ot'y 1er words`,fthefedg'e ofthe cloth at thebase f the 'cone will be ad vanced more rapidly than the center, and

the opposite edge of the. cloth willbe ada vanced lnoreslowly than the center. .By adjusting the angular relation of the roll-4 ers, the relative advance 'of the edgesof thel cloth may be iefzu lated to a nicety to correct the displacement of the threads. This structure is capable' of such adjustment that `the base,4 ofthe imaginary cone may beshifted from side to side cf the machine as re uired.

In the drawings which-illustrate vt e in ventionz- 'Figure 1. is asideelevation of the device, partly broken away. i

Fig.V 2 is 'a front elevation. Fig. 3 is an isometric perspective yiew'of one of the'roll supporting'members,

Referring more particularly tothe draw ings. 11 designates a pair of frame members. which may conveniently be luprights securable between the floor and ceiling of a room` Adjacent faces of these frame members are proylded \v1th gui( les 12 in which is mounted asuitably heayj slide 13 extending across 'the machine' from frame to trame; This slide carries a rol. 14h Foi-.convenience in manufactuieithe slide may be composed of end castings 15 comected by a suitable web 1G. such as boiler 1f late. The slide `is of considerable weight, a 1d its bearingtsurfaces are extended to such :l degreethat-there isn'o possibility of it j amming-'or :binding in thel guides 12. In'thcy Vupperjmrt of`the maclii'ne..an 'arinl is;v mounted on each frame. and projects to 4front andback of the ma chine.' Idler rolls lS'and 19 `aremounted between these arris.\ The. active rolls, or Athose which are adjustedfto form tli'e imaginary Acone'j-neviousily referred to.. are designate-d20. 20a and 20 and in the drawing are shown'to be three in number..l It will be 1understoodj that any suitable number of rolls may be used. 4These,rolls'rare mounted in bearings 21 which vslide between guides 9.2 havingzslots Q3 the rein. through -Whichtrunnions 24 of thebearings pass.

22 are" connected together bycentral cores 25 j The guides I rigidly attached one on each frame member il. These cores. also form,.bearings for a suaft 26, which is threaded at each end, the threads preferably-being'both of the/same direction and pitch. A nut 27 is mounted on each vthreaded portion of theshaft 26, and is connected by a pair of links Q8 with the trunnions of eachroll bearing.y If desired, a bar or rod 29 may be provided parallel with the shaft 26 havingslidable engagement with-the nuts, and arranged tov hold the same against revolution, thus relieving the links 28 of this function and of stress incidentY thereto, It will be readily understoodA that when the shaft is rotated, the nuts, being held against revolution, will be caused to travel longitudinally on the shaft. 'lille' Connection between the nuts and the roll bearings vtransmits this movement to the bea-rin s, so that the same shift in the guides towar or away from the shaft, according to the. direction of shaft revolution. The threads being of the v,saine direction, it is ob- Vioiis that the nuts will travel Iin the same direction, that is, one toward and one aiijay from the.,en d off the shaft, so that the tog'- glesformed by the links will force. the roll bearings away from the shaft at one end and d-raw them toward the shaft at the opposite end. The result is that the rolls mounted between the bearings at opposite ends of the. machine are brought to the form of an inliaginary cone. If the direction of shaft rev-v olutionis reversed, the rolls are restored to parallel condition, and if the movement is continued, the rolls again assume the nconical arrangement, with i the diference that the base of the cone is at the opposite side of the machine. .A

In order that the .cloth maybe passed over the. greatest possible surface of ,the rolls 20, 20 and 20@ it has been' found .desirable to provide idler-rolls 30 .and 30c between the stralghte;-ing'rollsQOand 2Gb; 30 between 20 and 203,; `andia".between 2()a and 20h. These rolls for the arrangement shown in the drawings are .ffourf in ,'nu-mbe'r, and mounted in each end in bearing plates 31, which may be secured between the core block 25 and the frames 11'. In .order tokeep incoming cloth out of contact w-iththe..straightening-rolls, an idlerroll 32 maybep'iovided=,. The rolls 30 may-be fmountedso as:y to maintain parel:l lel relation with one another, biitidf/desired` they may be arranged in al manner similar tio the rolls 20. If the movementof the=rolls l30 is in the. same-direction as their-plis the effectiveness of .the' -fmachinehis diminv ished, ywhileif the rolls 30 operate inthe lop,-a

posite direction to :theirolls-Ql, the effective-A ness may beiincr'ea'sed. It is, .howeven-pre-.f i

y.,o,r .outwe ird movement occurs, the length of ,path remains uniform As the cloth must ferred 'atthistime Vlo .have the mounting of the rolls frigiidyso that the-rolls maigitain,

parallel relation. AQhand wheel. 33 may be provided to operate the shaft held against longitudinal. movement by collars 3l.- Tlie cloth passing through the ina- 2Q?, over the-idler 30", around the straight- .enin roll Q0", and over. the idler 30 toithe idler 19. It will be readilyY seen that there is a loop of cloth between rthe rolls 30 and in which 'then-oil 1J; hangs or {ioatsl This roll 1l which is loaded by the weight of the slide 13 maintains proper tension in the cloth` and provides a spi-ing in the cloth .which will compensate for any lack of uniformity-` in the speed of cloth movement through the machine. The arrangement of the idler rolls 30 with respect to the straighteniiig rolls 2O insures a large surface of contact between the cloth and the straightening rolls, so that.' the positioning ,of these `straightening rolls has the maximum eil'ect on-the cloth. The arrangement also retains a considerable amount of cloth in the machine, so that` variations in the speed of movement between the two edges are distributed through a considerable length of cloth, and do not affect the cloth in machines on either side. In practice, the straightening machine is preferably placed between a washing or starching machine and a tentering machine, so that the cloth is in moist condition, and may:4 be much more readily operated upon tlianif in dry condition. The operator tending the machine watches the cloth entering and leaving the machine. As the cloth is stretched tight between the rolls 18 and'32, 4and between the rolls 30c and 19, the provision of a light between the two layers of .cloth will' render such inspection veryeasy. YVhen the operator sees a portion of the cloth coming to the machine with the weft threads extending diagonally, the hand wheel 33 is turned so asv to dra-w the ends 0fthe rolls4 '20 together atthe side of the ma-` chine where the advancedv ends of theweft threads enter, and sin'iiiltaneoush1 force apart the ends ofthe-rollsl at the opposite side of the machine where the lagging ends of the weft threads enter. This adjustment of the machine creates a lon er path for that ledge of the cloth where l l 4e vweft threads are dragged back,and at the opposite side ofthe i'nachine, creates a shortened path for .the edge ofthe cloth, where the ends ofthe weft threads are advanced. Midway .between ythe ends Ofthe rolls Awhere no. inward as a whole travel at the same s peed 'through the `machine, it follows that the .portion having' the longer path must traizel at higher' y l ri A must travel at lowerspeed. f' Therefore, the

speed, while' that 'having the 4siiarzter edge the Acloth Where `the weft threads`` are perf 'n1 adjust the' imaehiaerrpm t e ends" of. "eachtlireadi are ,siibstantiallji in a'fiiline driiiiin altri'ght angles tothe `of the Jcloth.' The intermediate. portion-fof the ne "threads "1s of no 'consequence in 'this in-v VQIV tibn nor? is itclaimec'l' that "theVWeft t ea'ds aref completely' straightened; as this 15.

" which: anll'sorstretches the yclothv in a transwrk is performed by anytentering machine',

VerseI ireiction. 'w1t freqnen't'ly happens that when `thjeth'reads'of apiece of cflt'itharel badly disarranged,` application of thepresentin- 'vention vdoes fiery little more than. bringthe two ends into proper line. "I Fhisis;v howen'rer.r q iiite suficient as'the tenter-ing machinefivill 'by its transverse stretchingr bringtl'ie threads straight.` If the adanced ends of thefweft.

threads'snbsequently occur on the opposite edgel of the cloth, the rotation ofl the shaft' is reVer'seduntil .thestretching oone'isalso reversed, that is, the 'small end'isexpanded and thelarge end is contrfacted. I n thefadjustment ofthe machin-e, particularly when sudden andA considerable` changes are `-inade in, the angular relation4 of l, thefstretching rolls, jit'will happen that there is'wlfreq'uently .aj slight acceleration 'of the speed ofi 'travel' vof j the Whole cloth through .the "machine,

Ordinarily, this would act as'ja' drag-on the machine behind and 'form a slack between the 4straightening machine and themachine Lnext in yline'.- Such 'a 'Icontingency is, however, completelyovercome by the: iise off the Heating roll .145 Wl'iiich merely rises .on stitch oecasio'nsand When the speed andi tension is againrestored toV normal,` falls to approxi-y mately its original!position.y

v Havingthus describedonr invention, what We claimis:

`1.y AImethod, of straightening the weft threads of cloth, which consists in accelerating the advance of one-edge ofthe cloth with respect to an "intermediate"'portion and -retarding theadvance ofithe opposite' edge witlrrespect to an intermediate portion1 4and in maintaining avariable` sizedsurplus of cloth .under uniform tension-, l

2. In a" device of `the character described,` a plurality of rolls, VandV mea-ns for simultal neously drawing togethery adjacente-nds of said rolls and separating the opposite ad-v jacent ends of saidq'olls the 'angularlmovementof all rolls being equal'.

V3. In'a` fdevicel o fithecharacter described` a' plurality of rolls,` togglel 'I''neehsui'ifsr'insV connecting saidrolls at their ends, and ine-ane for simultaneously operating "said ,toggle mechanisms to draw .the rollsftogether' at 4 `eftfo Ording to the Va'riationf infl position l Aplurality "tively to the. non: id jfustablev rolls;-

frangedftobe .supp orted yfzmaterial one end, and fofce l tina-rolls apart latthe opposite end, the angular movementofitll rolls being equal.

s, a 1n. den@ fithe-11aracer-describea a plurality "of 'rol ls,

and'. means frfsimnlta .alternate .rolls relalyle v directions .atj opposite" ineolisly adjust iiely inf hpp l .i r'lf'lii a'ldei/ic'e Soif the eliaracter described,

of ,acliutbl roliste plurality,

,f bH-fl'distbl Yrolls arranged' alternately.' .with the 'adilistab l. rolls "wird` mahs im?? siniiiltaneciisly inoningbpposite ends of .,th e" adjustableollsftldiferentpositions rela- 80 6. In `adeifice of thecliaracter described,. a Jlnralityl of j .rol ls adjliistable 'toward and away from onefznother` si'rniifltanebusly yatv opposite.ends=,' a plurality of non-adjustable rollsf' arrangeds al1 ernatelyiwith the adjlustl- '86 abley ,rolls, an idle frioll a'v 2 floating Iroll."` .ar-

passing ls, and

.means Y for 'holdi-ng said. rol-l 'against ltion `bymaterial [si lpporting same;

f y 9o 7. :In a'deviceof the character describe-d,

`4 slotted g'luide's, .beac rings slidable .between said' giiides,t runnions Von said bearings operat 'ingthe'guide slo's,= rolls mounted in .said

bearings, a threaded shaft, nutsirrevolubl'y `95 Vmounted on said sih'aft, andI links pivotally' connecting? said' nt ts and ,bearing trnnions.

- 84A, niethodiogf straightening dtheflweft ythreads 'of' cloth, :I which consists in locall' ,advancing portion s." o f oneed'ge Yandsimu f' [100 l taneonslyfretarding corresponding portions fof the opposite "e lge,.'al ternately with' ad# `-va'cing thev same j )ottionatuniform speed :9.A method .oistnai'ghtening the-'weft l threads; of Cloth, whichfconsi'sts. in .i `locally 10 5 advancing thecloth on one side. of al longi.

faardingthe 1clot-1 L da the ippposi, side o f.

said'.l ine, 'said ladvancernentyand retardnient increasing gradual lyWfrom said neutral line' `110 to 'th'efedges of the cloth.

- '10.- Ainethod oi? .straigh.ten-ingtheWeiftiv threads` of cloth', 1yhioh consists lin. locally f advancing the 'Cloti on oneside ofigiilongi-` tlidinal neutral lineand simultaneouslyv re-,` rlll-5 tardingthe `clothfon the' opposite sidebff. said line, said 'advancement and retardment increasing gradualy from, said"nei1tral linel to the' edges vofgth ej cloth,- and` alternating' with siich adva'ncel nent Vperiods L of `advance- 1 20 nient at u niforni'rae 4across the entire `Width of theel-oth.: I1.Aniethod ofV straightening-'diagonally displacedfwet' thrf adsjof cloth, which consists infadvancing the cloth .atuniforln rate7125y -across`; itsntire*widthl alternatelywith a l `differential rate of vadvancement `across its- 4 ififidth,-s' aid1 differen tial rate of? advancement l being, greater-than thenniform rate` at one 1.

edge vand less 'than` theu'niform rate 'at ithe- 130:5?V

opposite edge, and` of the 'uniform rate at f a line intermediate the edges.

12. A method 'of straightening the weft' threads of cloth, which consists in advancin'g a portion of the' cloth intermediate the edges at a uniform rate of speed, and increasing or diminishing the rate of advance `from said intermediate portion toward the edges and alternating the increase and reduction, of advance rate from edge to edlge of the cloth, according as the ends of t e weft threads are more'advanced at one edge o r other of the cloth.

13. A method of straightening the 'weft threads of cloth, which consists in advancing a portion of the cloth intermediate the -v edges at a uniform rate of speed, and -increasing or diminishing the rate of advance from said. intermediate portion toward the edges, 4and alternating the increase and reduction' of advance rate from edge to edge of the cloth, according as the ends ofV t e weftthreads are more advanced ,at one edge i or other of the cloth,v and alternating with such variable advancement of the cloth said intermediate ortion..

14. In'a device o the character described;

several rolls,A and means for adjusting alternate rolls into a conical arrangement havin y.the axis thereof parallel with the axis o the remaining rolls.4

In'witnessv whereof, .wehave hereunto set our hands, in the presence of two witnesses.

JOHN LOWE. v JOHN J. LYTH. Witnesses:

`S. R. W. ALLEN, G. M. MonEnAND.

25 across its entire width atthe same rate as

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