US2936965A - Bobbin - Google Patents

Description

May 17, 19.60

D. K. SEVABORN BOBBIN Filed Jan. 5, 1956 FIG-6' INVENTOR. DOUGLAS K. SEABORN ATTORNEY modification. Referring nowto Figure 1, there is -provided a bobbin 10 havinga'sub- .stantially cylindrical core or barrel 12 of wood or the United States Patent "ice BOBBIN Douglas Kay Seaborn, Pendleton, S.C.,

ing Milliken Research Corporation, Pendleton, a corporation of Delaware v Application January 5, 1956, Serial No. 557,543

7 Claims. or, 242-1186 assignor toDeer! S.C.,

This invention relates to bobbins for use in textile ap;

, of the groove paratus, and more particularly to a unique bobbin arrangetwist winding of the yarn thereonto. And conversely, a

creeling bobbin, when constructed according to my in vention may be converted to a standard cylindrical core bobbin construction, if desired, by a few simple mechanical manipulations. 1 Of course, it will be obvious that the creeling bobbin form conventional bobbins for roll-0E unwinding, if so desired, although it will be readily apparent that it is much more desirable in most instances to convert the bobbin to standard cylindrical core construction forsuch use;

might also be used similarly to' It is a further feature of this invention that provision is made for positively holding the original yarn end on'the axially outer portion of the bobbin flangeat the end of the bobbin opposite to that of a frusto-conical-pluginsert adjacent the opposite flange; so that a'yarn' transfer tail may facilely be formed at the end opposite to that over whichthe yarn is to be taken off, the frusto-conical insert serving to permit filling of the bobbin along its' entire length and pulling of the yarn off over the end having the insert thereat without breaking or otherwise damaging the yarn (as for instance, scufiing of the yarn due to excess tension rubbing, etc.). 1

These and other features and advantages of the invention will readily become apparent to one skilled in the art from a reading of the following detailed description, taken in conjunction with the accompanying drawings, wherein a Figure l is a view in perspective of a physical embodiment of my invention;

' Figure 2 is a side elevation view in partial section i1- lustrating one construction of the embodiment of Figure 1; Figure 3 is an end view of the embodiment of Figure 1, illustrating the upper end of the bobbin of Figure 2;

' Figure 4'iis a partial view in diametral section of a modified form of the invention;

i Figure Sis a partial view in diametral section of another modified form of the invention; v

Figure 6 is a partial side elevation illustrating a further the figures of the drawing, as seen in like and two planar end flanges 14 and'16 of pressed fiber or plastic. End flange 14 is suitably securedto the core or barrel 12 as by a plurality of headed screws 18,

'and serves as the supporting end during winding. of yarn onto barrel 12.

On' the axially outer surface of flange 14 a pair of double ended yarn clips 20 are secured, as by small screws or ,n ails 2 2, andserveto secure the transfer. tail of the yarn. In order to provide a sufficiently long transfer tail easily and quickly.

near the flange 16.

the circumferential periphery of flange 14 has an annular groove 24 ,formed therein, around which a few turns of yarn are wound after securing the yarn end to a clip'20 and prior to filling thebobbin between the two end flanges 14 and 16, To facilitate passage of the yarn into and out 24 (i.e. from clip 20 into the groove 24 and thence circumferentially along the groove and out onto the core of barrel '12) a longitudinal slot 26 is formed in the peripheral rim of flange 14 adjacent each clip 20.

Barrel 12 and flange 14 have formed therein a central holeor bore 30 for receiving a driving shaft 'or spindle (not shown). A transversekey slot 28 may'suitably be formed in the flange 14 as shown in Figure l, in accordance with conventional practice, for receiving a key or locking member on the driving spindle whereby the bobbin may be locked to and driven by the spindle. In order to prevent oscillatory or vibratory movement of the bobbin on the drive spindle'a metal or other suitable bushing 32 may be fitted within the bore 30 of the bobbin, as shown, which when the bobbinis in position on the drive spindle engages the upper end thereof in close relation.

At the upper end of the'bobbimflange 16 is secured to the barrel 12 through the medium of screws 34 which extend through countersunk holes therefor in the flange 16 and into the end of barrel 12.

A frusto-conical plug insert 36-of hard rubber, plastic or other suitable material, having a bore complementary to the outer surface of the cylindrical barrel 12 is mounted on the barrel with its planar base extending into closely adjacenfrelationship to the inner planar surfaceof flange 16. Preferably, a sheet '38 of soft felt material is disposed between flange 16 and the base of insert 36 and extends out slightly beyond the periphery of the base of in sert 36 in order to preventthe catching of yarn'between the flange and the insert.' Likewise, a similar sheet 42 of felt material of slightly larger size than-the cross-section of barrel 12 is disposed between the barrel 12 and the flange 14 to prevent the catching of yarn in this joint.

Referring now to Figures 2 and 3, insert 36 is removably held firmly in contact with felt sheet 38 and in close adjacency to flange 16. To this end a pair of diametrally spaced headed screws 40 extend through re cessed holes therefor in flange 16, thence'through holes in sheet 38 and threadedly engage the base of insert 36, whereby the insert is securely held in position and may readily be removed from barrel 12 by removal of flange holding screws 34. If it is also desired to remove the insert from the flange 16, it is only necessary to addi- I tionally remove insert holding screws 40. The insert 36 may thus be added, replaced, or removed simply,

The function of insert 36 is to permit a complete filling of the bobbin along its entire length between flanges 14 and 16 while permitting the yarn tobe dra'wn off-over 'the end of the bobbin'around flange 16, as in a creeling operation, without the yarn becoming broken or otherwise damaged as itvis unwound from thewindings lying In the standard cylindrical barrel bobbin having onlyv planar faced end flanges the top few layers of yarn may be wound off over the end; however, whenthe lower layers of yarn are reached the combined effects of sharp bending'of the yarn and friction thereon along the inner surface of the end flange as the yarn is unwound from the windings adjacentthe'let-off end flange will cause the yarn'to break or become otherwise damaged, particularly in the case of:synthetic yarns such as rayon, nylon,etc.' By the provision of this plug insert arrangement a standard bobbin may readily be adapted for use in drawing off over the end thereof widely In order to achieve 111 um mints accordingto a;

emediates?ule sti inyention it is necessary that the angle of flare u from the smaller end of the peripheral surface of plug insert 36 toward its base be equal to, or preferably smaller thanrth -a ele of flarcfiitemthesmal g l -1% t hen iPhw Rff 9 q'fl-lhsleild-fiailg 1 =lt,is-.more adyan tageouslfonangle1tohe',sma11er than n e I 6 a her the. mere y-equa there o in rder' to assureabsence .ofrubbing contact .between-the-yarn and the; peripheral surface of ,the vplug Lin-after. it leaves its wound on position n.the lplug, valso to permit, the holding of greater amounts. of yarn -on the bobbin for any given diameterofrfil therancaom r, yarn ile v V with substantiallyanodarnage,to the .yarn; However, in order tor preyent yarn ,dama'geiti s importantthat the dif; ference between angle qeandangle [the not greater than apprc'rximately43/4v degrees.- On therother hand; in order to achieve maxirnum ,y armcapacitywith substantially no yarndamage .the angle} B must be as-large as possible. In-- one specific exampleconstructed according torny invention, a'bobbinrhaving arbarrel diameter, of 1.75 inches and a diameter of '5 inches; fonend flange 16 has functioned with maximum; results in handling nylon and rayonyarnspf widelywaried deniers by :employing a plug 'insert- 165havingaoneinch. axial length and an angle of'flare an]? approximately 52 degrees. The angle 3 in this caselis thus approximately 58 degrees with (fi-oe) being approximately 6 degrees.

It has further-abeenr found thatyarn damage may still be held to ,aminimumdn most; instances ,with an even .furtherincrease in rthe yarn, capacity of the bobbin by shaping the base ofqplug 36 to; form a rim, 7 as indicated an. Most satisfactoryfresults have -.been acl1ieved with rimsrof' width-up1to approximately .3 inch, the rim in the specific example given abo ve, being .1 2'inch.

It-willbenoted thatin the-useaoffa bobbin according tothis invention the-yarn isfirst .wound ontoithe bobbin with. thev transfer tailsecured under and around one of the clips 20, thence ,intolgroove 24 and around the-periphery of flange 1 4, thebobbin-then being filled with yarn alongits entirel'lfength between flanges 14 and 16 to adiameter or dcpthiwhich may, if desired, extend out beyondthe; outer; periphery of the base ,of insert 38. The yarn may then be unwoundover the smooth rounded peripheral surface of end-flange- 16' for its desired further; use, aster nsta eithewindiu r her o to W rp bea-m,.et5. fr macreel:or otherlsuitab es pport y us disposing the} nsert 3 6,at-'the-sopposite end to,the,tail retainer; clips .20, the;tail.secured by .a clip 20 may be nnloosed: therefrom. and attached to the, extending end of asucceeding bobbin whereby an effective and convenient transfer tail arrangement;isformed;which does not in any wayqinterfere withrthejyarmbeingi drawn off the bobbin over the let-oil flange 16 at the opposite end of the bobbin.

Ina-,modifiedformof; the-invention, as illustrated in Figure 4, theinsertu36a-isformedv with a lip or shoulder extending radially'inward'at; its ,base, toform an inner or central aperture, preferably complementary to the outerperiphery ofibushijng 32.. The fiange16amay. be

vsecured-Ute barrel 12a3in..a similar manner to thesecuring of flangerlfiin;the-embodimentof" Figures 2 and 3, asbyapluralityofrfiat:headed screws134m In this embodiment; however, with the lip or. shoulder 46 extending .acrossrthetendaof; barrel; 12aathescrews-34a either thread- .edly;, engage1 or, preferablyg pass: through 's-uitabl'eholes iformeddn the;lipbrrshouldem lfi andthus serve to more firmlyranchortheiinsert BGaeagainst possible movement, particularly possible-- rotarymovement relative to bar'rel fmoven ent olfinsierb rjelagtiyeto barrel l za isgprevented ir'r'this embodiment byfll HP orshoulder- 46 whichrests between theend of'the barrel 1212 Y (which; end thus forms elis j a ude ling thereof while still achieving olf over theendlof flange'16 of felt 38a. If desired, an additional screw or screws 40a may be employed in a manner similart'o that shown in Figures 2 and 3 to prevent torsional stresses on lip or shoulder 46, but for most practical purposes such is not necessary.

In a further modification shown in Figure 5 the barrel 12b is recessed alongits end to form a stepped shoulder 56 against whichabuts a substantially complementary shoulder 58 formed onthe reduced or small end o f*'insert 36b. IZhefinsert-QGb is thus effectively held against relative axial-movemem on barreli12b by this abutting shoulder arrangement; The insert 36b tends to be res ain .v a ainstz slat v tatiqn m vemen on barrel 12b by the frictionalresistancebetween'its base and felt sheet 38b and its shouldered small end 58 and shoulder 56 as well as along its central bore with its frictional engagement with the reduced outer surface of barrel 12b. Whilethis frictionalresistance alone .may be sufiicient in; some instances to prevent rotationofthe insert 36b on the -.b arrel12b, it is ;pre ferable in mostcases to employ additional means in the for-m of one or more screws.,40b, ,as shown, or a complementarykey and slot arrangementbetween the barrel and insert, to positively prevent any-slipof the. insert about thebarrel. Ifit is desired to use the embodiment of;Figure 5 as a standard cylindrical barrel bobbin with-no insert, such mayireadi'ly be omp i e by l pp ov r he u dn pQ tion ofbarrellzb,asleevre (not shown) of suitable mateia uchas -har er or h e, dhav n a h akr ne sw qr e p nd n to hed p ho he h u ds 56 o med on a -re! 12 2 w th t e engt th p n ineto the length of theuredueediportion of vthe barrel.

Each of the embodiments f Figures 2 4'and5 has been illustratedwithan insert 36 having-ari n 44. formed attire outer periphery of its; base,,an d such-isthe preferred construction for reasons as pointed out; supra. H weveraalt rnativ ly, th ngementof. ny rient the embodiments of ,Figures 2, 4. or 5 might also-.bfi employed with; a 'fr'usto-conical insert 36c having, a continuous unbroken tapered surface, if desired, with con,- sequent elimination ofthe advantageous results achieved withuse of the rim 44, andstill retain most of themajor features of the invention.

Obviously, .various modifications will be apparent .to those skilledin the artwithoutdepartingfrom therscope or teaching of my invention, and I, therefore, do not intend the, invention to be limited except as .definecP'by the scope .of;the appended claims;

,Having described my invention',lI claim:

1. A bobbin comprising a barrel having'a flangeat-each axial end thereof, one of said flanges having a planar axially, inner face, afrusto-conical plug having a: central aperture complementary to the peripheral end'portion of said" barrel inwardly. of and adjacentisaid one cfisaid .flanges,--said plug being mounted onsaid end portion :with its:base;extending toward and in close adjacency to said planarjfaceof said' one flange, a softfiber sheetqdispos'ed between and in contiguous relationrto said planarface of said one flange and the base of said plug, said sheetbeing of slightly larger circumference than. the circumference of the base of said plug. v

2. A bobbin comprising a-barrel'havinga-r flange at each axial end thereof, one of said flanges havingaplanar axially, inner; face, a frusto-conical plug having a central aperture complementaryto theperipheralend portion of said? barrel 'inwa'rdly of and adjacent saidpone of: said flanges, said plug beingmountedon said end portionwith its base extending-'towa-rdvand in close adjacency 'to-seid planar face of= said one fiange, fits; least one headed screw onefiange and into the end of said barr l 'onase amte 'hez'id'ed screw 'e'iitending; th" flange and into 'saidplugjat a radial'posi A v iucjr-rier phe l l urfaced; aidf a rs jw sebu aoaaeee Y is secured to said one flange independent of the screw securing said one flange to said barrel.

3. A dual purpose, dual structure bobbin comprising a cylindrical barrel having a planar disk-like annular flange at each axial end thereof, at least one of said flanges being removably secured to said barrel, a frusto-conical plug having a central aperture complementary to the peripheral surface of said barrel adjacent the end of said barrel having said one flange removably secured thereon and being removably mounted in contiguous surrounding relation on said barrel, a soft felt sheet disposed in contiguous relation tothe axially inner face of said one flange, said sheet being of larger diameter than the diameter of the base of said plug and of smaller diameter than the diameter of said one flange, the base of said plug being in contiguous relation to the opposite surface of said sheet, said plug having an annular peripheral rim formed at its base, at least one headed screw extending'through said one flange and into securing relation with said barrel, at least one headed screw extending through said one flange and into securing relation to said plug at a radial point beyond the outer periphery of the adjacent end of said barrel, the

other of said flanges having a yarn tail retainer on its axially outer surface. I

4. A bobbin according to claim 3 wherein said plug and said barrel have adjoining shoulders extending transverse to the barrel axis and holding .said plug against axially inner movement beyond the position in which said shoulders contact one another.

5. A bobbin according to claim 3 wherein the angle of flare a from the smaller end of the peripheralsurface V of said plug is smaller than the angle of flare 18 from the smaller end of the peripheral surface of said plug to the peripheral surface of said one flange, said plug having an annular-peripheral rim formed at ;its base, the width of said rim being within a range offrom greater than zero' up to approximately .3 inch, said angle 8 being not'substantially greater than approximately 65 degrees, and

the difierence between said angles 5 and a being not substantially in excess of approximately ,6/4 degrees. 6. A bobbin comprising a barrel having a flange at 'each axial endthereof, one of said flanges having a planar axially inner face, a frusto-conical plug having a central aperture complementary to the peripheral end portion of said barrel inwardly of and adjacent said one of said flanges, said plug being mounted on said end portion with its base extending toward and in close adjacency to said planar face of said one flange, at least one headed screw extending into securing relation through said one flange and into the end of said barrel, and additional securing and sealing means fastening said plug to said one flange independently of said screw securing said one flange to said barrel.

7. A bobbin .according to claim 6 wherein said barrel has a reduced cylindrical portion at said one end and forming an annular shoulder at the junction thereof with the remainder of said barrel, said portion having a length corresponding to the axial length of said insert, said insert having a shoulder at its smaller end, said insert shoulder having a radial depth corresponding to the depth of said barrel shoulder, said end shoulder on said insert fitting in contiguous relation with said shoulder on said barrel. 1

References Cited in the file of this patent UNITED STATES PATENTS 503,227 Benham Aug. 15, 1893 974,603 Schmidt Nov. 1, 1910 1,324,171 Propst Dec. 9, 1919 1,869,408 Bungay Aug. 2, 1932 1,881,383 Wylie Oct. 4, 1932 1,992,258 Taylor Feb. 26, 1935 2,222,039 Mahoney Nov. 19, 1940 2,233,137 Lewis -1, Feb. 25, 1941 2,579,046 Locke et al. Dec. 18, 1951 2,622,825 Faris Dec. 23, 1952 2,681,188 Miller June 15, 1954 FOREIGN PATENTS 4,508' Australia Iune 25, 1901 9,204 Great Britain Junev 1, 1891 "21,838 Great Britain of 1910 969,445 France Dec. 20, 1950

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