1,649,491 tated oii the boss,which, catises a cai):i action' to be iiiipai-ted to the portion 74 of the pins 87 Nyhich ride in the are-Liate slots "@-3 and in Qeqiience recii)rocate the o,-rippin(y jaws 82 in the gi.-ooves 81, iiiwardly towards each other, causing the ribbed ends 86 and ai.@ooves .'i5, respectively of the reces-.es 85 to enga-e ,t pluralit.), of the corru,"ations 103 of the bellows 100 aiid retain the s,,tme so @that the 10 iiiotith ITO of the belloais is parallel with the coi,rtigatioris 6f the bell6\vs, as shoivn in Fig. 2. The n-iotith porlb-ioii 110 of tlie bellows is noiv, dispes(?,d iii the bos.@ between the, die 15 a.iid reduced portioii of the siiioothing r6llers 51 whiel-i are freelv rotatina in parallel ali nnaeiit -\iitl-i the iiaouth po@ti n of the 9 @o bellows said rollers are retailled out of engagement -,Aith tlie s,,ti,,ie by compressio,n 20 sl)rino;s 45, by virtlie of tli@e expalider rod 31 beino- out of en agement with the beveled 9 encl of the bloclcs 44. Wheii the operator clesii-es to perfoi@ih tli-e sinoothiiig operatioii bn tlie riiouth of tlae 2r) belloav,.s thp, 1,,andle IS is pulled downwardly of eno@ao-es the rotinded eiid of the rod 31 zn zn aiid gradliallv forces the s,,tme horiz6iitaliy to the i-igl-it @ii bore 38 ancl,is projected into. ttie bore 41 of the head 42. The Avedo;ed he,,id 48 of- tl-ie rod 31 iiow,eno-ao-es the beveled eiid of tl@e bloelks 43, sprea& the blockg radl,,ill y oiitwarclly against the teiision of the sprii@,o;s 45 aiicl causes the rollers to move @5 radiall y outivard to eno,a-e the iiiiier periphery of tl-ie motitli of the bellows to be 6perated on. The sl-ioulder providecl on tl-ie --xt-erior surface of each of tl-ie 1-ollers by reducin( r ihe oiiter eiicls thereof is -,tdapted 4t@ to en,()@ao-e with the edge of the bellows ilioutit, @iicl il'i operation iiheii tlle die 6 carryili(y the rollers is rotatecl the shoulder 'des tipon aiid sliiooths the od c of tl-ie bel9 lolv,s iiioutli. 4:@ The rotat'in(, siiioothing rollers riding n abotit the iiiiier periphery of tl-ie article will sinootl i cleforiilities therefron-i Avithout materia'il y ive,,tl-,eniny the qan-ie by vii-tue of ttie sLippoi-tin(, die iiiai-ldrel. The op6ratioii is contiiii-ik,,cl u-ntil the clesired result is obt,,iii.ie,d aiicl flie , i ell ,trt'cle is tli reiiloved fr6iii the b(,,ss aiid die ii:landrel so that another ,Irticle rilay be placeci therein. T lii@,e fotiiicl it highl.y clesirable iii siiioothiii(y and expa dii-i(,, the niouths of - n iiietallic belloivs aiid the like that the bello-\vs ii-iouth be retained in p@irallel rel,,ttion -witl-i tl-ie coi.-r-Ligation oji the bellows aiid it is appareiit from tl-ie aboie tl-iat I have proviciecl a constructi6n which will readily aecoiiliplish this cle irecl res7Lilt. Having thus described my invention in a s;lno,-Ie embodin-ient, I am aware tl-iat iiumer,icl exte 65 o ii.9 a, iisive cleparti-ires inay be made froin the embodiment lierlein illustrated and clescribed but witliout departiiig from the spirit@of my iiivention. I claim1. In a. spiiini g, iiiachine for expanding the inoutli of iiietallic tubes the combina- 70 tibn of; aii expancler die and rnand-rel and a stipp ortill- frai-ile therefor, said expander c rriecl on one end clie comprisiiig a liead a of a rotatable shaft ' iiieans foi- receivin,,-,, poi@er from an ext@riial soiirce adapted to 7.5 rotat e the sliaft, ,t pltirality of die rollers liaoii nted iii the head, iiieans to nori-nally holcl the rollers otit of coiitact -\vith tlie tube motit h and,ii:ie,,Li-is to expand the rollers into coiit act with tl-ie ti-Lbe iiiouth, said:iiianclrel so coin prisiiig I a boss adapted to support means piiig.the tube tiid etaiii tlle iiloutli ior grip] r of the saiiie -\Vitliiii tl-ie iiiandrel in co,,txial alicniiient with tlio die rollers when they ar@'either ill their coiitracted or expanded 85 positioi-i@s. 2. Iii a spiniiing iutchine for expandiiiothe iiioutl-i of 1- iiet,,iilic tubes the combin@ition of an expal-iclor die anci niandrel ancl a,stippoi@tino- fi-aine therefor ls,,tid expander die DI) l i e a c a r r i e d o n o e e n d o f @ , i ro'calt-lablo sh,,ift, n-ieaiis @for i-eceiving power from an exteriial soiirce adapted to rotate the siiaft, a plurality of @die:rollers carried bv a lurhli'cy of blocks. arr' d i grooves Vp c ie n provided in the head, iiioalls to normally hold the rollers out of contact ivitl-i tl-ie tube iiioutli and ineans to expand the rollers into contact with the tub,e, said n-landrel coinprilsiiio; a boss Idaptecl to,support iiieaiis for grippiiior the tube and i@etain the iiioutl-t of tlie same within the maiildrel ill coaxial alignment witl-i the die rollers. 3. In a spitining iiiachine for expanding th& moutli of inetallic tubes the combinatidii 105 of an expander dic, ind i-ii@iiiclrel .tii I d sul--,- poiting frame, therefoi-@ said expaiider die com prisino- a 0 head carriect on ne end of a rot,,tt able shaft, iiieaiis for receivinc, po-wer l@r6 in an external source aclapted tno rotate ll( the shaft,' three stepped rollers aiid thre bloc ks slidable within radi,,tlly clisposed giooves in the head, said grooves adaptect to slidably retaiii tliree bloelks stid blocks proi 7ided with piiis Lipon which the rollers 115 t-is to iioi@mall are journaled to rotate, iiie, i y hold the rollers -otit of coiitact NAitli the tul)e nioutli ,ind i-ile,,Lns to exi),,tnd ttie i-ollers into contact witli tube, stid iiia,iidi,el 6oinprisin@@,, ,t boss adal@)ted tO SUPPOrt D)eans for oi@ippilig tlie tube aiid retain the iilo-Litli Of the saiiie witl-iii-i the iii,,tndrel iii coaxial aligiiiiielilt witb tlie die rollers. 4. Tna. in-ningmacliine@forexpanOLi-!-i ol- t', ie moutli of metal'jio tube-, the combiiiation of an expaiider die a-,id ni,,tiidrel and @t s-Lipporting frame, tlierefoi.@, said expancler die COII'Iprising % liead carriecl oii o@.ie eiid of a rotat-able sliaft, mean-, for recei -Vill@@ power from an external sourc6 adapted to rotate swiiiging t-lie c,,tiii 19, the beveled face tliere-@ coiiiprising t cL 11

1,649,491 the sllaf L,, tl-i.,ee step rollers and tliree bloclzs ill rad;lally disposed grooi7es iq. the lieacl, s,iid gi@c,,oves tdal:)Le@cl to slidably ret,aiii tliree bloel-s tipon Ai,liich the iollers are jouriialecl to otate o@-i p-',-Is pi-ovided for tlie purpcse, r e@,tc'ii bloe'Ll-I adi ted to be forced i-adially p ii-i tlic,, gl'ooves by virttie 0-r a plurality of coji-ipt@e@sioii spi,iii@)-s ad ted to ap bear uit)(@lil 'Uti,,, blocks oi-ic eiid aiicl the opposite eiicis ti-iel eof arfeliored iii tli@, head. 5. in a for exi,)aiidin(, the ii-iotith of iiiet,,liiie 'iubes ti-te coiiibination of all (-Ixpiilder (lie niarclrel and a suppoi-t'ij,)@ Illei,ellor, sald expandei- cL@c coii-il)i,isin,)- a ',,cad ea! iod 6n one ciid of a @L . . i-OLL,t,,ibic Tliift, ii-,eaiis f,),, i,eceiviiio, pol),,er ii-oiti tl;,, e:@@'L-ci-iial P.,Ctap'Led 'co i,ot@ito the slit,gi'-t. t i-,Iu,,.tlity of Ciie -i-ollet-s itiotint@-d ill the licad. to liolcl ti-ic rollers out. of co-iiiact tl-ie t-Libe iiioutli ai,id a car@i jjy on t'l@ic i,.iaiii fi,aiiie and ,t r@acii)i7o@able ex . aiioer i-od erli@p -lie i -,qble riecl -wil- iii a I)c),.-e j@.1 'L -ottil sliaft, said e-@:paiider shaft li@-,vii-ig a rotindecl 2,) eiid and iyeclged ei-id, sa,",@'L ca@ii aiid e,,@@i)andoiii-i@o cona, boss a,(Ia-,)ted to stipport il:leaj-is for o,,rippill'o. the tiibe. aiid retain tl,@e. 1-yiouth of the so sail-lo ivithin the ia-ial-iclrel in coaxial aligia'tli tl e d'e i-ollers. itie,nt wi 6. In a s,.)ii-iiaiD.g i-iiacliiiie foi@-,' expaiiding tlie, iiioiitli of i-netallic tubes tlae cojijbi-qatloji of an expander die and iiiancli-el tncl ,, sup35 1,)oi@tiiio- frai-ne thei,efor, sa,id expandei- die coiiipi-isiiig a lieacl carriecl oii one encl o'L a rotatabl.e sliaft 1-iieans foi, rece-tv'lllo' poiver fi-oi-yi an extei@l-ial source adapte,,l to rotate the sliaft, a, pi' rility of clie i-ollells riioiii-ited u 40 in I tiic liead, illeaiis to, i'lori,,iall-%' liold tli-@,, .1 I!Ollers out oj,-@ coiitact -@@7i'Lli the, tt-,I)e iaiotitl,. ,,-,Lid iii(,-tiis to expa-,i(.1 tiie iollel'S coiii,act, ll,itli the ttibe, stid 1.,iiiicivel coiiil)i-ising a boss iclaptect to stippoi-t a pair of ai,ticle 45 (-i-jppjijg jav,7s aiid iisecl to opei,@ aii@L close tite saiiie to I-etain the iiioiith of the - ,A,it,liiii tlic, iiiaiicti,el iii co,,txial ali-(,,iiiiieiit ivitl-i t,lie clie i,o-flers or to relcase 'Llic g@.@ip oil the ai-ticlc, s6 tliat it may Le i-eiiovecl fi-ojii the 1-tiaiidiTI. 7. @Iii I ,-@piniiiii- ii-iaeliine for tl)e iiiotitli of iiietitl'c tiibes tile coliit)iiiatioi-i of @iii e-@@-,,)andet- die incl, i-riaiidt-ol aiid a s,,,.I)- - I , -rie tliei -.oi,l sticl die I)oi.t'tj(,, fi-,ii -ei co.,iii)lllsiilg a cai-r.lecl on oiie eiicl of a I i-ot@itable slia'l.t, jiaeaiis I!or i,ecOjvino,,pj@ver fron-i iii external soui:ce adap'Led to rotate the sli,,ift, a pltiralit.@ of clie rollers iiiountecl in the liegd, iiieai-is to lioriiiilly liold the C, 0 rollers out of coiitact with ti-ie ttibe iiioutli aiad r@ie,,iiis to exl)and the roller,-z iiit6 contact witli the ttibo, saicl iiiaiidrel coiiiprisino, a i-od ad.ap'L-eci to expaiicl tji(, t,-,(,t the tiil@e said boss tdapted to support a pair of article gl.jpplng i--@icl iiieaiis foi-:ope-@-iing aiid closido, the san-i-- CO'llappising a i@otlitablc, rin(f 65 ca,ri-'@ecl 0 atil@@ o-ii. tli-- pei-ipliepy 'of the vill 'I pal L boss ar, r o' arc-cate sl6+s, eacli ilita of ,,tid gi-ippirig jaws ao,,a-,-)ted 'lo cai-ry piiis ad-aceiit tl-ie otitei: ends aiad aetapted to be projec'ced ilito t,lie, ai-etiate slots iNTliereby a 70- caiiiiiiing acti6ii Avill be eftectecl tipon the s pijis @b tl-ic, te -Iolus iil c,@-i tl)e 3--ino- i y tD l@y z tool -iii@-z6i-ted I'nto tlie; tool receiviii(y ilecess. 8. Iii i iiacliii-ii@@ Gf tl-@e clas-@ t'lle 7r) comoli-iqti@)il of aii enpipder -iiie,- Iiiap.@isin f6r tlae i-notith of ttibes stiel'i Ps nietallic bellb I AYS aiad i fi-aiiie t;lierefor. S:,i(I ex-lsjiig a. iiiij-d 1)@,i,,dei- i,el and a @lle sa-ld illaildrel coiiij)risiji2- a I)e,,@i,d c;iil- 80 i-ied b-y a bat- depeiidii),,y i-i,oiii O-L Fi@ e - aii:ie iiic@l a@l@:ipt,-@cl to s-Lipl)orL a, 1)ait- of i-eciproc,ble ia,,N,,s F I g,.-@ippi.-Lig the belloi,@'s anci rettili the rtioutli of tlie'saiiie; iiithiii the i-A:,@iii c @ i [,,el iji cdaxial aligiin@ciit iiith tlae die, 85 sai(i clie coiiiprisincy a rotatable head cii-ried o:@ii(, crid of @oltL,,ible, sha-i'ti, iiieans for po,,,-ei, -fi-cii-i @ soiirce to rotate tlle -iiii'-ecl a(Ijaceiit. the oppor:,jlkl lioicl@ ilio site end of the slia,ft@, a, Iiii@all'tv o' s,,i-iootli- i)O p iiDg i-ollers ii-iouiited oii sliclable blocks carried in (-,.-ooies '.i-i tie lie'.Icl, iilaaiis to ii6riiially liol@t the rollei@s out of co@iitict, ivit.'ii tile b("]I ox, s aiid Piea,i-is ca,rrieci by the sl-iaft 'Lo e@,pand the i:ollers into contact Aiitli the titbe 95 ivlien oper:at-ing on tlie tube, to siiiootli aiicl - exl-)and tlle i@,alls tliereof, ajid ii:ieaiis foil i@ecipi-ocatidg t,lie bello-"-s gi-il)pi,,ig jaiis. 9. In a spinniiig iijachii-ie foi@ exoancling iiiettillio ttibes, the coiiibinat-ioi-i ofan ex-- 100 pinciel, die Ind iiianclrel coii-ippisiiig a rotatible heaci, itieaiis foi@ i-otitin. said lie(id, 9 a pliii-ality of die rollers ,iiotinted iii tli(,, lie,,,cl rtieai-is foi! iioi@iiially lioldin,(-@- the i,ollei,s 105 iii coiitact with tlic ttibe, iiieins -tL@oi, o,i-ippinothe ttibe and a b-oss on said iiia,,-ldrel adal:)t(@@i to stil)port. s@id )-i,ippiiag iijeaiis Lo i,etain the siii:le inde-.N--ed i-elative; to tl,,c cl@l-- i-ollei,s -wlien tli(@y ai@@e either expatided o-e co-Titractecl. f6. Ili a spiianing i-n,,icliiiie folexptliclido- 110 -iiiet,tllic tubes, the coinbiiiatio@n of an exising a i-opap,-Ier die ancl iiiancl-e(-@l, coiiipi@' ' tatal)le heacl, iiie,,ij-.s for rotatiiig said lioad, a ,Ii:s slid-,ibly carried oii the y o:f blo, lieacl, a pli.11-al,@ty of ctie rollei-,,3 rnotinted on tlie L)Iocks, iiieans for norjiizi,lly lioldiiig the roliel-s li'l contact ii-i'Lli the ttibe, aiid a boss oii said iiiaiidrel ada I pted to stippoi@'L ineaiis for @rippiii the, tube to, retaiii the saiiie in9 120 de--,@ed i-el,-,tivo to 'Llie, die rollers ivhen tl-tey ai-e citlier e:@palided or coii'Uracted. li-i testimony ivh6reof I liereunto affix my signatui-e this 16th day o,f Julie, 19,@-16. HERMAN SCI-IMID.

Patented Nov. 15, 1927. 1)649)491 UNITED STATES PATENT OFFICE. HERDEAI@T SCHYLID, OF CLEVIILAND, OHIO. SPINNING XACHINE. A-pplicatiorL filed Tiily 15, 1926. ScriaI No. 122,535. ivly ii-iveiit;on relates to a iii,@ichine for ex p-,tiicliiicr inetallic tubular ,irticles -,tnd more n particul,@Lrly it relates to a machine for smoothi-P.L) - cfoiith portions of met,,tllic tubes, slich as tubular belloivs. One o-l@ the objects of nay irveiition resides ii-i the provis.ioq of -n iiiipi,o-,Ted expai-idini-n-eclianisiii adap'Lecl to roll the clefoi-mities i@) in the iiioutli oi' tlibtilar bellows of a w6lll@noivn t3,pe iyithout -vve,,ikeit'ng th6 s,,,me. Aiiother object of illy invention is to provide such a meeliaiiisiii N-vhleh ri-itiy be reaclily acljtisted for operating oii iiieta Ilic tubular articles of varyjp-g cliainelers. I .5 Aiiother object of nV iiivention i-, to provicle an impi@o.ved maelilne of this type -whieh is siiiiple and efac-lent and citir,,Lble in coiistruction. ,Lncl capable of qLiiel@ly and efficieiitl)T iiiipei-fectio-iis frolu the in 20 ter;.Ol: ar@d e@.-@terior -@-,,alls of tub,,@ end 13ortions iii aii etteacious iiianiier. Another object of n-iy invention is to readily el'@ect the grippin,), ancl accui@ate positioning of saicl tube iiiouth for such siiioothiiig 25 operalioi-i, parallel to the corrtigations in the tube. Otl-ier objects of iiiy inventioii ancl t-l-ie inveiition itself Avill be ,ippareiit froiii reference to the folloivin(T de--- cription of an eiii:30 bo(liment thei-cof ivlilcl-i embbcllinent is illustratecl iii the accoinp,,tnyiiio, dra-wings whereill: P-,efei-i-ii-ig to the dra-vvings: ri io-. 1 is a sicle elevational view of an ap35 para@Lis einbodying my inventiori. Fig. 9, is a tongit,,idinal inedial sectional v@e-w of Lt clie ancl iiiandrel per se.einployed I in 'Lhe s,,Licl eiiibodiiiient, iii operation., li'ig. 3 is a froiit elevatioiial view of the 40 (lie part of Fig. 2. Fig. 4 is a front elov,,ttioiial view of the iiiai-t(lrcl part of Fi(y. 2. Flo,-. 5 is i perspective vic@w of one'6-f the pai@t,@,@ eiiiplo@,ect iii the eiiibodl,.iiei-it of Fio'. 1. li5 Fig. C) is a side'elevationql vie,,v of a iiieallic bello-,vs, ,tclaptec[ to be oper-,tted upoi-i L by the appi@,,ttus. Figs. 't to 10, iiieltisive, are vieivs, iiiostly iii otevatioii, of soiiie of the i)arts comprised iii tli@, said ciiibodlillent. and Fio-. 11 is a-perspletive view of another part emplo37ecl tliereiii. P.eferrino, to all the figures of tlie cirav@,iiigs in ,Lll of Nvhlch like parts are designated 515 by like 1--el'evence eb,@u-,,tctei@s, at 1, T show in 9 @ ciioril t t,,Lble for supportin(y iiiy improveci naachine frame generally de,-,sigiiated at 2 I and ,it 3 o,.enerally aii ex 'anding iiieclianism n p aiid rliindrel carr'ed Lil)on olie eild of the said fr,,ime, aiid coinprisin- a die niandrel t) 60 ind article gripper supp,ol-tiii(y b,,tr 4, .t die jiiandrel 5 and an expanding die 6, said expancli,,io,@ CLie tnd n-lanclrel will be hereiliafter n-ioi'e flilly desetibed in detill. The iiiachine fraiiie 2 foriiied preferably of a, siligle casting comprises a btse plate 10 and a iiiai-ii body 11 and ldter,,Ll projection 13 i-ipon ;xTlilch the trious parts v of the machine are c,,Lrriecl. The main bocly pbrtio.n 11 exte-tids -L,.pivl@rdly froin'tlae bise 10 ind is 70 aperttired a@1j,@icelit one end to periiiit preferably a di-iven pulley wheel 12 to rotate tlierein al'id provided at the opposite end u A ilh tlle lateral integral pi@ojection 13 adapted to support the maiidrel supportin(-Plbar 4. 7,5 The franie is suitably ribbed abotit @its edges such as at 14 to reenforce the san-ie for li,,,Lvy operations. BeariDg boxes 15 aiicl 16 are proviclect and disposed aclj,,tcent the upper edge of the so fran-ie being prefei-ab@y cast inteoi@al thei-eNNitli ancl,ai-ranged iii spaced relatioii to eacli other ind aclapted to rotatably, s-Lip I port ,ii-i operatin- shaft 17. Said shal-t'lias provideci on one eiid Iiii oper,,ttor's h,,indle 18 and at its s5 o j@osite enci t caiti 19 secured p thereto pref erably by i t,,Lpered pin 20i as shown, or in any sliitable iiianner. Thrust collars 22 aiid 23 are iiliounted on the shaft iiiterniediate it's encls ancl contigilious to the inner -%valls of the I)o be,,iriiig boxes 15 alid 16 and Idaptecl to preve nt I.ateral displacement of the shaft tl-ierein. Preferably tapered pins 24 are iiiserted into suitable opeiiings i-E the collars to ietain the same in positioii on the shaft 17. 95 Bronze b-Lishings 26 and 27 @tre inserted iilto the joliriial boxes 15 and 16, respectively, to 1)roiide an efficleiit be,,iriii-- for the shift. The caiii 19 Fig. I aiid Fio@. 7, colilprises pref-erabl.y bod poi-ti6ii 5.6, htv'liio@ ,i loo y cyl'ndric,,il I)ortioii 57 it its upper encl and a beveled face caiiiiii-ed po-i@tioii 28 at its lower encl iyl)ieli depencis froi,,-i the sliaft -17 preseiitlllo,- the beveled face laterall.1, of a. holloii, cylinclrical sh,,tft 30 and contiatious 105 to -.t die expander rod 31. Stiid shaft 30 is horizontftlly disposed substaiitially inidway of the fran-ie and rotatably supported in bearing boxes 31-), 33 apcl 34 all of which are provided witli suitable bearilig busbing 35 lIQ

1,649,491 of brojize, or the li,l@:e. The pulley iybeel 12 Is secured to the sliaft 30 adjaceiit oiae ejid by a pin 94, as slio-VN"n, or iii @itiy well l@nowji and aclapted to ro'L Ite said sliift I I , Nvlien i,ece'v'iiu poii,ei, ti,6iii a ,@oiirce, ii.ot slioivnl blit i,)ie;"or,,ibly t piilley Lelt di-iv(-,@-i I)y aD. el,eCtriC iiiotoj--, o@,, 'L-lie lilce. TI)e oppos;lte extreiiiit-y of the sh,,tft is acltptect to cai,ry the expaiidii-i(,, die 6 socu.,i-ecl thei-oto by 1( piiis 95, oi- tli(, like. Thrust collars 36, siii-iiltr in construction to the thrust collars 22 and 23 qre seelii-ecl to the sliaft interniecliate its encis and c ontic,yuous to the oppo@,ecl iliner faces of the I r) beariii-S 33 aiad 34 to pi-e-veiit lateril iiiovc,li'lent of the shaft tliei,ein. The expander rod 9,1 lo(,,sely fits Aiithin the longitudinal bore 38 ol' the siiift 30 anci is rouiided at 39, the roii--Qded encl projectilliq 20 against the beveled poi-t'loii of the cai-i 19, as heretofore stated, iiid adapted 'Lobe re ipc rocated lo.- igittidin,@,lly iiitlii,@i t'i)e boi,@. Ttie opposite extreinity oT saicl expander rod 31 is provided Nvitli a Avedyegliai)ecl liead 40 aiid 2,@, is projected iiito the ceiitral bo--.-e 41 of the liead 42 tlle reciprocab-i.-, t,. cl ;, ,,Ily dlsi,)osed blocl@@ 43 being forced i,- @dially i-iiivardly in the raclial slots 44 against the beveled portion 104 of tl.ie rod 31, by virttie of the force exerted by the coinpression sprin-S 45 cai,ried in tl@e recesses 46 on t@ie i,,-iiier faces of the blocl@@s, the opposite encls of the sl)r'1110'S bearing against the plates 4(, c,@trri-ed on the 1,)eripliery of the heaCL 42 aiicl sectired thereto by i-nachine screiis 60 to cloc-- ,e the outer end of the sa'd slots. The slots 44 ai-e provicled ivith olterliangin(, flano-es 48 I)rovicling track ivays for th@ blocks to slicle iii saicl blocl@s haviiio- bei,eled ijiner eiicls 61 I.Licl 40 are al@)ei-tui,e at 49 intermediate tlieii- ends for the )- ecej)tioji of liea(led 1)ins 50, ivhicli ins projee't, laterally tlierefr(,iu and ai,e eacli p ad,tpted to ,@iippoi-t a I)Itirality of ra(lially clispose(i siiiootli.in@,y i-olleil-s 51, preforabll, @ 45 in niii-nber, each l@-ai,in- a i-edticed poi-tioii 107 and ,t ,zhoitleter 108 T-ormed b.), i--dticing the sai@ie; said i@ollei-s beiiig i-etaiiie(-l tll,-,rco,,l by vii-tiie of the eiilii-ge(I lieads 52. These pins are sectired to tlie blocks by trips50 vers(,,Iy dl,,@I)osed I)ijis ,)3 acl,,il)tecl. to I)c --@orcecl throtiali ip(@rttii-es -)4 iiid @)5 @iTi tl@e I)Iocli@,s ancl. pliis, i@espectively. The die iiiiiidrel anct I)elloivs gi-ipl)ei- o ,iro stipported acljaceiit the loiver end of the bar 4, which is rigidly secured to the lat(,ral skeletoji I)rojectio--i said projectioii liavino- .t ceiitrally disl,)osed opoiiin- 58 throtigli 'T'i@i.ch the ba'r isinsertecl. aiicl helcl tlierein, b y virttie of the iiiichine bolt 62 anci a -I)i,-l 63. Saicl @,ie manclrel i-tid aripl)er preferably comprise a liollo-T cvlinorical sta'uionary boss a4 hai,ii-ig a cenf'rtlly disposecl eylinclric,,tl bore 65. Recesses 66 a-,id 6T are provided iii the rear face thereof.- for tlae reeeptioi-i of the seciii-ii-ic bolts .106 anO pin 105 respectia-ely carriecl adjaceilt the lower extrel,-@ity of the bar 4 to secure the saine tlle,,-eto. The I)in 105 is ad,,il)ted to prevent ielatiA-(-, rotatiitc@ iiiovement of the boss on tlic, stipl-)o--tin@,,, I)ai, t. A pilr ol@ '.iiinul@ii@ i-iii@-ys 68 tild 69 are abotit tllc, I)eilliI)Ilf@lly of the boss 64, the foi-iiier of wliieli is dist)osed to the rear oil the latter and is secured to the boss froiii i@clative i-otation by a set sci-eav TO iiiserteci tljrougli openin(- 71 ind adaptecl to bea,2 agaiiist the boss @@ii-id adapted to litei-.ul of tll-,e -i tlio bo,-,s 64. n ( , Tli@ 69 is provideo, Avitli a t,,tp liole 'i2 alid a p,,ir of arcuate slots 7,1, said I"Illg js a(laj,)ted to be i-otated on the boss 6-4, b.Y ills(@i-tioii o-t@ ,i sli;table tool, iac,,t into the lap bv iii oj)ei-,,Itor. I'lie end of the boss 64 adjacent the die lietcl 42 is aiiiiiilai,ly flangeet at 80, and 'ls 1)]@017idecl wi' ul-i a vei-tical slo'L- 81 extendiiag ici-oss its i-@'till di,iiiefer for the receptioi-i of a 1)ai.- of oi,-)-,)ositely ieciproetble bellows gi-,_.i)pl'no. @,,Ilid iiAAs eacli haviiig I ser,,ii-c; retil-,ti- i-ecess oi- 1,,ello-@,iTs o-i-ip ing por- go ' p tioii Sd -roi-@l@ecl in tlaeir belloavs abtittino, eii(IF@, the iiiiiel@- Pei,ipliel-ies thereof liaviTic,i,@II)s 86 aiid semi-cireLli,,Ir (.1-0017(,-,@ -i5, collf(,'I-Illin(" to the @oi-i@tigatioii. 103 of ti-io belloivs for,@aiecl thereon, idipted to gi@ii) @ind 1,;ellovvs@ ii'lolitli 110 iii@ clie iiip@n@Lrel so that thr-, rollei.s -",III smootli tlle mo-Lith tliereof pitrall.el to the belloivs corru (yations. It is to be no'U-ed f roii-i reference to tl-ie It-li,,it the b(-'ilo@A-s lo( coi,@@tigations ,ire I)arallel to each other and not of sl)iral cojifigtiratioii. Acljaceiit the otiter eiads of the laws are@ al.Derttires 186 w li'c' lieacled ])ins 87 ai-e i-Tiserted, sloiabiittiii,-- e-.ids 74 thei-eof ,ire aclal)ted to 105 be 1)ro-'ected ilito the ',,ti-etiate slots 73, lici-eto-'Lore refei-red to, so 'Ubat the jaws iiiay be i,Qc.il)i-ocated in the slots 81 yvlion the rin(y 69 is rotated. -i@ (lie i-tiandi-el 88 prefei-ablv o-l@ disli: formition, halTin,-- @i centt,,,illl,v clisposecl bo-Le, S9 I'S scleill,ecl iii a i-ec-ss 102 iii the flailge 80 by r@iachine scj@(@iv@@ 90 -,is slioivii, o@@ in a lilic 1,@@aii-iier -tii(I tl,,o i,,,ws froii-i latertil i-novement oii the I)oss. 115 In oi)(,,i,atioii '.lie bores 38, 41 65 in,cl 99 liel@-oto-fol-e -eforre(I to, ii-e a'il ,irraii(,-ed in a-,,iil ati-iiiiieiit. Powe., IS 3@Ceei-,,-ed fi-oi-.Li i. sourc-- ,-,iid @onti.nuotisly driites the 13jille.), wleel ,Yhich rot@i'les sllaf'L -30, t-lie lieid 421 I'@, 0 aiicl I't,s -.ssociatecl pirts. -@V@:stiiiiiiicr the iiiachine 'Lo be in tl,,e I)osition illus'Lrate,,l in rii@,rs. I tncl 2 an article 0,0 to be Avoi-i@ed srcli as a ii-io',-qllic bellow's 1 is place(I -within the bore of the boss 64- so 12i 4.1 iit the nioutli i)oi-tion 110 proj ts into the ec clie 83, the Avalls of -"7hicli snu2.ly fit witliin the iiiier peri])hery of the die. The prong of a tool, iio@L sliown, in@iy be plicecl into tlle i .(,n. b(,, ro@ 1;@i, bole 72 iiicl t@lie 68 tl3