claiin as m invention: y 1. In a machine of the character described means for supporting a cyli,,idrical metal shell, @ die head reciprocable toward and away from said 50 support axially. of a shell thereon, a roli edging die and a beading die carried by said head, a first power iictuated means f6r advancing said head toward said sup@ort to engage the blank by said edging the with a period Gf dwell at the end of 55 said advance movement, and a second power - actuated means oiderablb in timed relation with the first for moving said beading die into and out of engagbment with the blank during said period of dwell and for theieafter returning said head 60 to its initial position. 2. In a machine (yf the character described, rieans for supporting a cylindrical metal shell, a' die head reciprocable toward and away from said ,uppGrt a:kially of a shell thereon, a ring shaped 65 roll edging the carried on the front face of said head, a radialiy expansible beadiiig die disposed on said head forwardly and centrally of said edgirig die" a flrst po'Vver ae,tuated means for advancing said head toward, said %Upport to. engage the 70 blank by said edong' die with a period of dwell at th6 end of S6,id advance mo,@ement, and a secotid power actuated means operable in. timed relation with the' first forexpanding the inserted beading die into engagemeiit with the blank and 75

4 2,211,009 contracting the same again durirxg said period of dwed and for thereafter returning said head to its initial position.. . 3. In a'machine of the ebaracter described, means for supporting a cylindrical metal shell, a the head, means for effecting relativetraversing movement between said head and support axially of a shell thereon, an edging die on said head engageable with the adjacent edge of,the shell, 10 said support including an abutment at the end of the shell opposite said head and cooperable with the latter to clamp the shell therebetween, a beading die alsq carried by said head and positioned forwardly of said edg'mg die within the shell when 15, said edging die is positioned in engagement wtl@ the shell, and means for actuating said beading die lateraliy into engagement with the shell in timed relation with the relative movement between said head and support and after the shell 20 is clamped by said head and support. 4. In a machine of the character described means for supporting a cylindrical metal blank, a die head traversable toward and away from said support axially of the blank and having a 25 bore therein alined with the aids of the blank, saidsupporting means including an abutment bearing against the end of the blank opposite said head, a ring shaped edging die on the fbrward end of said head encircling the end of said bore, 30 and engageable -With the blank to clamp the same against said abutment, an expansible beading die on the forward end of said head and insertable into the blank, an actuator for said expansible beading die projecting thr6ugh said bore, and 35 power actuated means for moving said hbad and actuator in timed relatio-n. 5. In a machine of the character deser-ibed, means for supportinga cylindrical metal blank, a die head traversable. toward and away from said 40 support a3dally of the blank and having a bore therein alined with the axis of the blank, a ring sheiped edging. die on the'forward end of said head,encircling the end of said bore, an expansible beading die in the forward end of said hbad 45 and insertable into the blank, actuating me'ans for said be'ading the including an aidaily slidable draw bar in said bore, means including a rotatable cam for advancing said head toward said support with a period of dwell at the end of the ad,@@@ce, 50 means for projecting said draw bar forwardly of said head to expand said beading dieand for refurning said draw bar through a full return stroke equal to the advance of said head, means on said head engageable by said bar to effect a with55 drawal of said head by the return stroke of said draw'bar, and common power actuated means for driving both said head advancing means and draw bar. 6. In a machine of the dharacter described, 6o raeans for suivorung a cylindrical metal shell and including an abutment engageable with oiie of the sheill; an edging die; a beading die; -and power actuated meg-n for simultaneously advancing said dies to a position in which said 65 edging die engages the sheu and the other dges not, retaining said edging the in such position for a period of dweh whle moving said beading the tiiw and out of operative engagement with the shell and thensimultaneously returning both dies 70 to their initial positions, said edging the being. effective in said flrst named position to ciamp the i;hen aganst said abutment. 7. In a machine for roll-edging and beading a cylindrical shell,@ the combination of a rou-edging 75,die, a bead fqrming die adapted to be inwrted into the shell, a clamping abutinent arranged iii ppposed spaced relation to said roll-edging die, means for effecting relative movement between said -edging the and sheu axially of the sheu to bring said edging the Into operative engagement 5 therewith to not ozily edge the shell but also to cla ' mp the same in position against said clamping abutment and for simultaneously effecting. relative m(ivement between said beadlng dle and shell to position said beading di& adjacent the 10 shell, means operative in timed relation with said flrst named means to move the inserted beading die into engagement with the sh@ll upon completion of the edging operation, and means for simultaneously effer-ting a disengaging movement 15 bet*een both of said dies and the shen. 8. In a machine for rou-edging and beading a cyundrical shell, the combination of a roll-edging die, an expansible bead forming the adapted to be inserted into the shell, a clamping abutment arranged in opposed spaced relation to said rolledging die means for effecting relative movement ed the and shell axially of the shell to said edging the into operative engagement therewith to not (ynly edge the shell but 28 also to clamp the same iri positlon against said clamping abutment and for siinultaneously effecting relative movement between said beading die and shell to insert said beading die within the shell, and means operative in timed relatiorl with 36 said first named means to -expand the inserted be@ding die into engagement with the shell upon completion of the edging operation. 9. In a machine. for shaping cylindrical sheet metal blanks, a pair of spaced and opposed eircu- 39 lar edge shaping dies, flrst power actuated means for effecting relative movement between said dies to engage the respective ends of a cylindrical shell positioned therebetween, a beading die in@ertable into the sheu while said flrst named dies are in, 40 engagement with the shell and thereby holding it against movement, and a second power actuated means operable in timed relation to the flrst for moving said beading die Into and out of engagement with the shell. 10. In a machine of the character described the combination of means for supporting a cylindrical metal sheu, a head mounted forreciprocation toward and away from said support aidally of a sheu ttiereon, a beading die on the forvvdrd go end of said head insertable into the shell to form a bead there'm intermediate its ends, and means including a horlzontal guide member resting on the shell when positioned on said supporting means for engaging the bead formed therein to 55 strip the @hell from said beading the upon the withdrawal of swd head and for guiding successive shells, into position on said support. 11. In a mmchine of the character dese a tran@fer mechanism for presenting s e 60 cylindrical metal blanks to a die mechanism -the like comprising an inclined runway for s porting a series of cylincirical bl", for roning movement towurd mdd beading me@ans with the 63 blanks disposed in parallel relation, s@id runway I having,notches therein for receiving @,nd holding the blankr,in successive l@ositions 'in a step-bystep adyance thereof, a r-eciprocatablerae.kextending along said runway I)eneath the surface there@ 70 of, a plurality of pushers tiltably mounted on said rack, actuator means for tilting said pusbers alternately above and below the surface of said remway tc) bring the ' same alternately into and out of pushing position with r espect to the blanks,

2,211,009 and means for reciprocating satd rack in ttined relation with the tilting of said pushers. 12. In a maebine of the character described, a transfer mechanism foi presenting successive .5 cylin&ical metal blanks to a the mechanism or the like romprising, means for supporting a series of cylindrical blanks disposed in paraflel relation, .a reciprocatable rack extending beneath said last named means transversely to said blanks, a plu10 rality of pushers tiltably mounted 6n said rack, actuator means' for tilting said pushers alternately upward into engagement with the blanks and downward out of engagement therewith to bring the pushers alternately into and out of 15 pushing porftion with respect to the blanks, and means including a lost motion connecti6n for connecting said actuator In driving relatign with said rack to reciprocate ihe same In timed relation with the tilting of said pushers. 20 13. In a machine of the character de@eribed, a transfer mechanism for presentin successive . 9 cylindrical metal blanks to a.die mechanism or the Uke comprising,.means for supporting a se-. ries of cylindrical blanks disposed in parallel rela25 tion, a@ reciprocatable rack extending beneath . said last named means transversely to the blanks, and a plurality of pushers movably mounted on said rack and adapted to project upwardly from said rack and operatively engage the blanks during 30 the forward movement of the rack and to be tilted downwarcuy out of the path of said blanks during the backward movement of sald rack, at least one of said pushers having a recess formed in the rear side therwf adapted to cradle a bl ank pre&sed against the same by the next..adjacent pusher, to thereby position swh blank with respect to the the mechanism or the like. 14 ' In a mwbine of the character described, 5 means for supporting a cylindricia metal shell, a the suppdrt iL roll edging the and a beading the farried by said dii3 support, a ftrst power actuated means for effecting a relative advancing movembnt between - ,aid supports axially of P, blank 10 carried by the support to engage the blank by said edging the with v. period of dweu'at the end of said advance movement, and a second power adtuated means operable in timed relation with the first for moving said beading the into and but 15 of engagement with the blank during said period of dvell and for thereafter effecting relative movement between said sup]@orts to return the @,ame to their iwtial positions. 15. Iii a macbine of the chamcter described,- 20 the combination of a flxed the for shaping:the edge of a cylindrical metal sheu, a reciprocable head for pushing . a gher Into engagement with the die, a stripi)er pmwnting an elongated edge extending transversely across th6 periphery of the 25 shell int.ermediate the latter's ends when the shell is in engagement with the die, and power actuated means for, withdrawing said head from shen-enga" position and smuentbdly moving awd stripper endwise of the shell away _@ro;n sMd 3.0 the into.engagement with &.curl on..the opposite end of the sher to strip it from ttie'die. CARL C. 61 6TNF&

Patente.d Aug. 13, 1940 2 1 2 1 1 , 0 0 9 UNITED STATES PATENT OFFICE 2,211,009 METALWORKING MACIUNF. Carl 0. Grotnes, Park Ridge, M. Application April 25, 1938, Serial No. 204,042 Claims. (Cl. 153-2) The invention relates to machines for shapIng sheet metal article@ such, for example, as cylindrical shells or blanks used in making pails, buckets and the like, and has for its principal 6 object the prbvisioi! of a unitary machine f or iiot only edging the blank but also forihing, a bead therein all as liart of a single operation. A further object of the invention is to provide a combined roll edging and beading machihe 10 for operating on cylindrical metal blanks in which the respective edging and beading dies are operated in timed relation to shape the blank expeditiously and econdinically. Another object of the invention is to provide 15 In a cylindrical blank shaping machine an improved transfer mechanism', for automatically, presenting successive blanks to the shaping dies.- The invention also resides in various structural improvoments in the mechanism for stripping the 2( shaped blanks from the dies. ftrt4er objects and adv:intages of the invention will become apparent from a consideration of the following description taken in conj,unction with the,accompanying drawiiigs in which: 25 Figure I is a perspective view of a metal working machine embodying the invention. Fig. 2 is a perspective view of one of the,finished blanks after it has been operated on by the machine in Mg. 1. so Mg. 3 is an enlarged longitudinal sectional view 'along the line 3=3 in Fig. 1. Flig. 4 is a vertical sectional view along the. line 4-4 in Flg. 3. Plig. 5 is a longitudinal sectional view along the 35 line 5-5 in FIg. 3 illustratffig particularly the transfer mechanism with a series of work bl@nlcg in position thereon. Mgs. 6 and 7 ake enlarged fragmentary front elevations of the die head with the beading, die 40 in respectivety coiitracted and expanded positi6ns. Fig. 8 is a detailed.prespective view of one of the die blocks iheluded in the beadirig die. Fig. 0 is a detailed transverse sectional view 45 along the line 9-9 in Fig. 3. Flor purposes of illustration of its various novel features, ttie invention has b@en, shown and described herein as embodied ir. a machine for forniing a rolled edge 10 and annular bead II 50 in cylindrical blanks 12 (Flg. 2) such as are used in fabricating pails for paint and ihe like. It wul,be apparent to those skilled in the art, however, that the invention isapplicable in many of its aspects to machines for shaping other arti55 cles. In. general, the particular maciiine inustrated (Flg.-I) embodies a bed 13 on which is mounted an aid4lly reciprocable die breast or head 14 carrying a circular roll edging die 15 and -an expansible beading die 16 on its forward end. Plain cylindrical sheet metal bianks are prosented to the dies in a xial glinement with the head 14 b@, transfer mechanism 17 which moves the blanks step by step transversely of the machine. As the. head 14 advaiiees, the blank is forced agains t an adjustable abutment or stop I 8 and 10 a rolled edge is formed on the end of the blank facing the head 14 by thib roll edging die 15. In the course of this same advancing movement of the head the beading die I 6- is inseited within the blank and upoii the completion of the roll 15 edging operation the beading the is expanded to engag e the blank and form the'annular bead I I therei n. The beading the 16 is then retracted out of engagement with the blank and the head 14 retumed to its initial position. The transfer 20 mech anism 17 serves to present successive blanks to the dies in timed relation with the die head move ment so that the ma operate@ (@ntireiy autom atically. The edging the 15 (Figs. 4 and 6) has been 25 shown in the form of a ring-shaped plate 'bolted to the forward end of the die'head and provided with an annular groove 19 which receives the forwa rd edge of the cylindrical sheet metal blank 12. As the head. 14 advances to the posi- 30 tion shown in Flg. 4 the blank is forced against the stop IO so that the forward edge of the blank Is curled outwardly and back by the groove 19 as shown in Fig. 4. to form a suitably rolled reinforei ng or strengthening edge IO on the blank.. 35 U the st6p IS is used siinply as an, abutment and guide it may have a plain flat surface. In the ev@nt , however, that it is desired to expand the outer edge of the blank in flange form to shape it for the connection of a bbttom wall member as Indicated at I 011, a truiicated cone-shape d projection 20 Is provided on the face of the stop l@8 (Mg. 4). In such case the,stop 18 and projec-, tlon 20 serve as a second opposed edging@ die. and the. opposite ends of the blank are shaped simul- 45 taneo usly by the compressi6n of tht blank between the die 15 and stop I B. In -order to aecomm odate blanks of differeni ixial length, the abutm ent 18 Is adjustably mounted on the bed j 3 (Flg. 1) by a Screw 2 1. 50- The beading: the IS (Fig. 6) Is composed of a plurali ty of the blocks 22 arranged In the, supportin g structure of the 'head 14 In a cirewar series and supported and guided for'radial movements. For this purpose eabb of the the blocks 55.

2 22 (Mg. 8) is pr6vided with radiahy extending grooves 23 in its opposite faces which receive complemental projections or guide ribs 24 (Plg. 7) on a circular retaining plate 25 and on the face pf the. ring-shaped edging the 1.5. The retaining plate 25 Is mounted in spaced relation to the front of the edging die 15 by series of through bolts 26 surrounded by spacing collars 27. Petention of the segmental beading die blocks 22 in 10 their normally retracted positions is effected- by a r,ircuiar helical spring 28 positioned in annular grooves 29 in the outer ends of the blocks. Vvhen in Its retracted condition the beading the Is of suffleiently small diameter that it may be moved 15 freely into the interior of thei blank. For the purpose of forcing the beading the blocks 22 radiary outward into engagement with the blanks, a cone-'type actuator is employed. Flor this purpose a cone 30 (Flg. 3) is secured 20, to the outer end of an axially reciprocable draw ba;r 31 slidably supported In a central Lbearing sleeve 32 bolted within an axial bore 33 in the head 14. To accommodate the actuator the the IS bas a central opening I 61, alined with a 25 counterbore 331, in the face of the head 14. The conical surface of the actuator 30 has flattened bearing surfaces for engagement with the Inner ends of the repective die blocks 22 so that when the actuator is thrust outwardly from the positiori 30 shown in Mg. 4 to the position shown in Fig. 3, the die blocks 22 are correspondingly moved outwardly from their retracted positions (Mg. 6) to their radially or laterally projected positions (Mg. 7). 35 The head 14 eonstit utes a reciprocatory slide upon wblch the two-dies 15.and 16 are mounted for movement aidally of. the work. To form the rolled edge andahe bead, the two dies are operated ih a predetermined timed-relation, the ar40-.rangement being such that as an incident to the movement of the the IS with the head to form the L rojled edge, the the II Is positioned for subsecluent radial expansion'lby an Independent movement of Lthe actuator SO relative to the head to form the 45 bead. ]In the pr4esent instance the head is of generaily cyhndrical contour and Is sijpported for axial movement on the bed 13 of the machine through the medium of axially extending side ril.%5 34 (Mgs. 3 and 9) disposed in guideways w fcirmed by the bed and by retaining plates 35. Thme retaining plates are bolted to the sides of the bed and are provided with flanges'36 overlyIng the ribs 34 on the liead. Mmed sequential a6tuation of the dies and 55 their supporting head is effected by a driving mechanism which serves in general llrst to ad@ vance the head 14 to the position shown in pig. 4, in which the edging the 15 engages the blank 12 and forms a rolled edge thereon, second, to exao pand the beadizig the into engagement with the blank as shown In Flg. 3, third, retract the beadIng the to. its initial position, and finally, retract both of the dies out of engagement with the blank and return the head 14 to Its initial p(sition. This 65 power actuated mecharasi@i includes a pair of gean 37- (Flg. 3) Joumaled lii the bed 13'on shafts 38 and connected by an eceentriCLerank pin 39, the gears being driven by an electric motor (not shown). Flxed on the outer faces of the gears 70 37 are peripheral ca= 48 engaged by cain follower rohers 41 JoumaJed on head 14 7be thrust exated by these cams on the foll@wers 41 advan . ces tlhe head 14 from Its initial position to Its fuby projected position (Plg. 4). The cams are 75 cmtoured so that a period of dweh IoU(wo In which the head 14 remains During this dwell, the movement of a Pitman 42 connected between the eccentric crank pin 39 and the draw bar 31 projects the cone shaped actuator outwardly with remmt I to the head so that the 5 beading the Is thrust into engagemeht with the blank. Puither movement of the pitman 42 during ttie dwell period ' retracts the draw bar 31 to Its initial position so that the actuator 38 is again in the position shown in Fig. 4 at the com- 10 i3letion of the dwell. The spring 29 thereupbn contracts the beading the to its ii3itial diameter. In addition to their function In aettiating the beading die 16, the cone-shaped actuator 31 and the ipmcia@ed driving connections also serve to 15 positiveiy retract the head 14. Thus, upon continued rotation of the gears 37 to their Initial position, the head 14 is pulled to its starting position. by the pitinan 42 ancf draw bar 31 due to the engagement of the rear face of the actuator 39 2( with a s)2oulder, 43 (Mg. 4) at the bottom -of the counterbore 33". It will be understood that if desired more than one set of beading dies may. be placed In the bead 14 anci actuated In timed relation to each other and to the edging die. 26 Successive blanks are automatica]Iy presented to the machine in timed relation to the movement of the dies and then 'ejected from the machine after being shaped so that tiie constant attention of a workman is not i-ecluired. The transfer 30 mechaniSML 17 (Flgs. 3 and 5) for this purpose embodies reciprocating means for positi@ely pushing thid blanks 12 step by step along a pgtth L transverse to the line of reciprocatim of the die 35 carrying'head 14" and for locating successive blanks in opemtive alinement with the dies. In the construction Illustrated a plurality of blanks 12 are advanced simultaneously by a serlea of pushers 4""O carried on a horizontauy reciprocable rack 51. These pushers are tiltably 4o mounted on the rack so that they can be depressed and sHd under the blanks oit the retum stroke of the rack (to the left as viewed in -,Mg. 5) aiid then raised into pushing engagement with the blanks (as shown in Mg. 5) on the opposite or advancing stroke of the rack. - A common drive mechanism, hereinafter described in greater detail, is utilized for reciprocaung the rack 51 and for tilting th e pushem 4"5-58 so that the reciprocating and tfltiiig motions of so the, - pu'shers wnl, occur m timed r*latim. As shown, the rack is formed of spaced channels 52 (Plg. 1) Joined by webs 53 and Joumaled on rollers 54 secured to the machine bed 1.3 by brackets 54s. is Fresh blanks 12 are robed mto the,tranater mecbELnism by a pair of spaced stationary irLclineg-runways 55 (lMg. 5) having notches 56 in their upper. surfaces for receiving the blanks at sequential points in their #4p by sWp prog- go ress. The pushers 4"0---U advance the blanks from gne notch to-,the next upon each reciprocation of the rack 5 1. Tb support a blank In operative alibement with the hes6d 14 th6 last pusher 90 in the serks is notebed out so at gla to cradle and receive a blank' forced against It bv the next adjacent ptliber 49. 7bese twO Pushers 49 and 58 thus coopemte to hold the blank against laterai displacemont while it is being operated upon by the dies. Moyement of the bIwAs 12 trinaverwly with respect to the the head 14 Is guided not only by the abutment 11 but also by an opposed guiding mechanism including vertical gfiide plates 57 ("g, l)-secured to a rW rectangular frame- If

2,211,009 :3 work 58 surrounding the forward end of the head 14. Thege guide plates present. sni6oth flat surfaces spaced a distance from the abutment 18 substantially equal to the length of the blanks.. being operated upon. 'To guide the blanks 12 .into the space between the plates 57 and abutment 18 the leading edge 57a of the first of the plates 57 is bent out so that the blanks will slide' transversely of the rack 51 into proper position 10 if they are located too close to the head 14 as they move onto the. machine.. 'rhis guiding mech7 anism also iricludes a horizontal guide bar 59 pivoted on the frame 58 at 60 and adapted t( ride over the tops of the blanks as they move 15 into position in front of.the head 14. The weight of the pivoted bar 59 forces the blanks down against their supporting I)usher 50 so that they will be accurately alined with the dies. In order to coordinate the actuation of the 20 transfer niechanism IT with that of the die head 14 ! they ;ire preferably driven from the same prime mover. In the ma6hine shown a lever 61, (Figs. 1 and 3) pivoted in a bracket 62 on the side of the ma6hin6 bed @s intermittently oscil25 lated by a 6ylindrical grooved cam 63 fast on the gear shift 38. This intermittently osdillating lever 61 not only tilts the pushers 48-49-50 but als6 . reciprocates their supporting rack 51 through the medium of a lost motion ronnection. 30 To this end the p:ush6rs 48-49-50 are mounted on bell crank levers 64 pivoted on the raqk 5i pivot pins 64a and pivotally connected at their lower ends to a rod 65 (Fig: 5) slidable in the rack, the outbr end of thig rod being connected 85 to the oscillating drive lever 61 'through a link 6G. The lost motion connection of the rod 65 to the rack is formed by spaced collars 67-68 fast on the rod 65 and engageable with the oppgsite faces of the transverse rack web 53. The first part of the inward stroke of the rod'65 to the left (as viewed in Flg. 5) tilts the pushers i38- 49-50 downwardly and then the engagement of the collar 67 with the rack web 53 shifts the entire rack and pusher assembly inward during ,15 the remainder of the'stroke. Sine,@ the pushers are thus depressed below the level of the blanks 02 they pass freely under them during this inward stroke bf rack and pusher asseiiibly. Simiiarly, the L-irst part of the outward stroke of the 50 rod 65 (to the right as viewed , in Fng. 5) tiltsthe pushers aB-49-50 upward again and then the engagement of the other collar 68 witli. the rack web 53 sbifts the rack and pusher assembly outwardly to its initial position. Druring this outward stroke the. raised pushers bngage. the blanks and move each of the series one step forward. In this maniler the blanks are liositively advanced step by s@tep to operative engagement with the dies 14-d5, and upon complet.ion of the 60 die fofming ODeration the finished blanks are pushed from the machine by the last pusher 50. In order to prevent premature movement of the rack 51 a friction plate 69 .(Fig. 1) is preferably secured t ' o one of the channels 52 to en6,5 gage. the rollers C-6 when the rack 3 I is fn its extreme inward posi'tiorl- (to the left as viewed in r,ig. 1) so that only a positive piill by the COIlarG8-ontherackweb 33will dislodgethe,jarhmed plate .69 and permit the rack 5.1 to movel out7( wardly. Stripping of tl-ie finished blanks 12---from the dies 15-1-6 is acoomplished by the h6tizontal guide bar 59. This guide bar rides o-ri the t'op of the blank between tlle rolled edge I 0 and bead I I ro that wl@Fn @Uie die head 14 is retracted the stationary, bar 59 will engage the bead I I and thereby strip the blank from the dies iii the event that the blank tends to adhere to the die 15. Accordlngly the finished blank is readily ejected from the inachine by the next pushing stroke of the 5 pusher 50. The guide mechanism m@y also be utilized to str the shaped blank from the flange forming projectio n 20 on the abutment IS in the event that such a,forming abutment is used. For this puf- 10 pose the guide supporting frame 58 is carried by a pair of bars 70 journaled for horizontal sliding inoveme nt in lugs 71 projecting from the bed side plates 35 (FIg.. 1). Adjustable collars 72 and 73 on the rods 70 are engageable by lug 74 on the side of the head 14:which projects through a slot 7 5, in one of the side plates 35. With the collars .12 and 73 positioned as shown In Mg.@ 1, the guide frame 58 will, of course, remain stationary while the head is reciprocated. - Vlhen it is desired t( 20 use the guide mechani,,;m to strip the blanks from the stop @ IO, the collar 73 Is moved along the rod 70 away from the adjacent projection 71 and made fast to the rod in this adjusted position. Then the return or retractive stroke of the bead 14 will cause the lug 74 to epgage the collar 73'sb that the entire guide frame58 will be retracted during the final portion of the head return stroke. This retractive movem6nt of! the guide 'frame 30 causes the horizontal guide bar 59 to engage the rolled edge IC formed on the forward end of the finished blank and.thereby pull the blank free of the projection 20 on the abutment Is. Similarly, on the next advancing stroke of the head 35 14 the lug 74 engages the other c6llar 72 so as to return the guide frame to its normal working position for engagement with -the next blank presented to the machine. Alth ough a particular embddiment of the invention has been shown and described in some 40 deta-il for Purposes of illusti-ation, there is no intentign to thereby limit the invention to such preferred embodiment but, on the other hand, the appended claims are Intended to cover all modi-fications within the spirit and scope of the in- 45 vention. .1