US1798017A - Method of and apparatus for shearing packs of hot-mill sheets or the like - Google Patents

Description

J. W. FREE METHOD OF AND APPARATUS FOR SHEARING PACKS March. 2 4, 1931.

Filed June 24, 1926 March 24, 1931. J, W FREE 1,798,017

METHOD OF' AND APPARATUS FOR SHEARING PACKS OF HOT MILL SHEETS OR THE LIKE 7 Sheets-Sheet 2 Filed June 24, 1926 vAll ll I Il Il ml W Free,

10.N\ NE Q a E Mmh 24, 1931.

'J W F METHOD OF AND A REL-tv 1,798,017 PPARATUS FOR SHEARING PACKS OF HOT MILL SHEETS AOR THE LIKE John W. Fraz March 24, 1931. W, FREE 1,798,17

. I METHOD OF AND APPARATUS FOR SHEARING PACKS OF HOT MILL SHEETSAOR THE LIKE Y Filed June 24, 1926 7 Sheets-Sheet 4 I Si w w l 1 R i Q Em o se, Q

l l l l b o l Q Q o.; n

1926 7 Sheets-Sheet 5 ,wwf

March 24, 1931. J, W "|`REE METHOD 0F AND APPARATUS FOR SHEARING PACKS OF HOT MILL SHEETS OR THE LIKE Filed June 24 '7 Sheets-Sheet 6 March 24, 1931. JLw. FREE METHOD 0F AND APPARATUS FOR SHEARING PACKS OF HOT MILL SHEETS OR THE LIKE Filed June 24, 1926 @M @fmwmwv Maren 24, 1931-. J. w. FREE 1,798,017

' METHOD OF AND APPARATUS FOR SHEARING PACKS I OF HOT MILL SHEETS OR THE LIKE Filed June 24, 1926 '7 Sheets-Sheet 7 31a/vanto@ Patented Mar. 24,V 1931 f Unire STATES JOHN W. FREE, OF WOODLAWN BOROUGH, P.ENNsrzmvAn-m, Assialvon fro JONES .a

.LAUGHLrN STEEL 'CORPORATIQM OrgPITmSBURG-H, -BENNSYLVANIA A "oonroaa- .U5-ION PENNSYLVANIA .THE LIKE METHOD ory AND APPARATUS ron SHEARILNG PACKS or HOT-MILL SHEETS voa Application ined June a4,

This invention relates to, Vthe shearing 2of -inetal packs or sheets and aia-ns generally Ito improve the method ot and apparatus for shearing hot lmill packs into sections of predetermined size after rolling prepaafatery @to Afinishing the sheets.

-have Selected for descriptive purposes and shown inthe accompanying drawings .a shearing Imachine illustrating the invention as applied -to sheari-nghot mill packs for tin plate, black plate, etc., .wherein the` packs are lil-rst -slitted cross-Wise, and then the edges are'trimmed.

In -thedraavings Y' Fig. 1 isa side elevationof the machine;

Fig. 2 .is a top plan view thereof Fig-.3 is a longitudinal 'sectional .View fof fthe mach-ine taken on -theline 3;-3 OfFig. 2; v

Fig. 4 isa transverse sectional view fonthe line 15T-4in Fig. 2;

Fig. 5 is a fragmentary sectional View off the machine taken on theline '5--5 of F 2 showing the mechanism lfor stopping the pack preparatory to initially trimming or sqnaring olf-One end; y

6 is a 'fragmentary sectional 'View taken on the line 6-.6 of Fig. 2, showing the device for flattening .the pac-k longitudinally; Fig. f7 is Va.`fra-gmenftary sectional view taken on the line n--f of F ig. '2, illustrating the details of the ejector;

Fig. 8 is a fragmentary Sectional Vview taken on the line I'8 8 of F '2 showing the-actuating mechanism vfor the feed rolls;

Figs. 9 and l0 are a plan view and a longitudinal edge view, respectively, of a pack; Fig. 9 illustrating the `'Old manner of slitting in lautomatic shearing machines; and

Fig. l1 is a plain of a pack,-illustrating the improved manner of slitting. l

Hot mill packs of Sheet steel, as they are delivered from the rolling mill, vary 'from 14 to 33 inches Wide and from five to eight feet long, comprisingtwo, fourjoreight Sheets rolled together and adhering 5to each other. These packs usually haveV a very pronounced how por curve .in both the longitudinal `and transverse directions; the 'curve in the length oftllie pack amounting to six Or Seven inches and -thecurfve or -hoiv transversely Softhep*ack pack.

i926. seria-1 No. 115,317.

often `Yamonntin'g toene iinch.A Many O'f'the vpacks 'are also lcaa'nheI'ed lengthwise, ithat' is, curved in the horizontal plaine Soif the pack as shown Jin Figs. i9 :and 1111-.y In ip'r-ior Teombinatifon ana clrinesz'for cross cutting an'd'elge According to my invention, the :packs that :are delivered from a millafre rtralnsiei'rred Ito a suitable ivork table, :andare vshear-eel trans versely into :sections While 'being held lia-t under tension of A'a transverse presser so thatl the lcuts will be square and accurate. 1T-he sections of the packs thus cut are then transferred to shears Where 'their nntrinrmed v-side margins, which .may now 'be ythe ends Voi .the

ysec-tions, are 'then trimmed also nn'der a presser, thus :forming `a truly lsquared section.

In the form of a machine for carrying ont theinv'ention `shown -in the drawings, the :base .110, which may he of 'su-'ftafb'leclesign,-sup ports Onfthe forward jsi'fde, a Work receiving tab-le l1, provided with stops 12, with which @the packs fm'ay `Contact to center themfprior to vbeing `.fed ,':into the-machine, and transverselydisposedend fram-es 13 iin the upper ends of "which Sis jonrnaled a cross4sha'ft la which is adapted to he rotatedintermittently Or centinuionsly from the main driving shaft k1-5 by means of a -snitalolershajt 16 and angle hearing (see l and 2).. Themain shaft is connected by a clutch 17 to the driving gear- 18, which :may be driven by' a motor cr other "power means. The fcrossshaft la isadapted te actuaba a reciprocating entrer .head yi129 ipe- 4rre dicaliy by means of :eeceatrics 2'@ menne-ed :upon t-hfe shaft `and connecting straps .'21 Se cured to 'the cutter head 19 `(See Fig. 3);. Inl ter-mitteilt or continuous rota-tion of fthe gshfa'ft 14 will, therefore,- inteimttl/idly or feontm 'sly l`1-eaei1f recate' the; scatter head. "The @uae-Hman is' previaed "with afknrfep'redeterf blade 22 and presser member 23 (see Figs. 1 and 3), the latter being adapted to cooperate with an anvil 24, thereby to flatten the pile of sheets transversely so as to permit of an even square cut by the knife blade.

According to my invention, provision is made to feed the pack lengthwise intermittently a predetermined distance after each crosswise cut in ordei` that the Vpacks may be cut into sections of predeterminad length prior t0 the edge trimming. As shownV in Figs. 2 and 8 of the drawings, the upper feed rolls 25 are secured to a shaft 26 journaled in suitable brackets 27, and are geared to rotate with and adapted to cooperate with the lower feed. rolls 28, which are' journaled'in bearings 29 slidable in guides 30 formed in the brackets 27,;and normally resiliently urged into contact with the feed rolls 25 by means of springs 31. The feed rolls are rotatable only in one direction,so as to feed the material forwardly, and for this purpose the shaft 26 may be provided with a gear 32, connected through suitable intermediate gearing 33, to a gear member 34 rotatably mounted upon one' end frame 13 `so asto be rotated intermittently by means of suitable Y mechanism operated from the crank arm 35 -on Yone end of the shaft 14. Inthe illustrative example, ratchet mechanism is provided for actuatingk the gear'34, as for example, comprising a connecting rod 36 and bell crank lever 37, having a pawl 38 yworking inthe internal ratchetof the ge`ar,'so as to rotate the feed rolls'to feed the work forwardly only upon each Vupward stroke of cutter `head 19. Y.

For the purpose of stopping the forward feed of the pack preparatory to trimming and 5) I may provide astop member 39 carried by a lever 40 pivotcd to the end frames 13, and adapted to be'actuated byimean's of a lever 41 connected to the lever 40 by means of a link 42. The lever 41 is provided with a roller vor other contact member 43'ada-pted to contact with' a suit-able cam 44 on` the cam shaft 14. Preferably the link 42 is adjustably connected to the lever 40 in order to vadjust the operative position: of the stop member 39. After the end of the pack has been sheared or trimmed o'the stop member 39 is not further required until the next pack is fed intoY the machine, and as shown in Fig. 5, l have provided suitable means for holding the stop member in its inoperative position. In

the form of holding means shown, a latch member 45, which is pivoted to the end frames 13, as at 46, is provided with an actuating rod Y47 adapted to be operated by suitable means,

as for instance, a treadle (notshown). The lower end of thelateh member isweighted, so that it noiinallyfassunies a position to'engage under and support the levei"40 i n raised position, as shown in fulllines inFig. 5. As

is obvious, when the rod 47 is actuated to unlatcli the lever 40, the right hand end of the lever (as viewed in Fig. 5) will move downwardly under its own weight as the cam 44 is revolved to present its low surface to the roller 43, as is shown in dotted lines. The cutter head 19 is then lowered to clamp and trim the end of the pack, and the scraps are permitted to fall through the'space between the end frames, into a suitable receptacle (not shown).

After one end of the pack has been trimmed in the manner just described, the pack is advanced forwardly by means of the feeding mechanism described above, until its trimmed edge contacts with the gauge stop members 49 (see Figs. 3 and 6), the stop member 39 now being supported in raised position out of the path of the pack, by means of the latch member 45, as shown in full lines in Fig.

V5. The gauge stop members 49 may be suitably mounted upon the frame of the machine, but preferably are'mouiited upon spaced presser feet 50 ofsuitable dimensions for flattening the bowed packs longitudinally ofY the machine. The gaugey stop members '49 may be, ,andv preferably are, adjustably mounted upon the presser feetv 50, as by bolts passing through slots 51 (see Fig. 2) so as to adjust accurately the limit of feeding of the pack past the transversecutter 22 to cut sections'of desired length from'the pack. The presser feet 50 are mounted uponA slide blocks 52 which are connected by a shaft 53 and moved by an adjustable rod 54 pivotally suspended by one end of the lever 55mounted on a cross-shaft 56 supported upon the end frames 13, and which lever is adapted to be actuated by a cam 57 mounted on the shaft 14, the arrangement being such that during feeding yof the pack the presser feet 50 will be raised so as not to obstruct the passage of vthe pack, but when thepack is at rest, the presser feet will be lowered to flatten thepack longitudinally and transversely. The slide blocks 52 which support'the presser feet 50 I preferably are arranged to slide in guide*V ways 58, formed in the endfframes 13, as is ends thereof shafts 62 andr63, whichare adaptedl to actuate through suitable connec` tions, s forwinstance.eccentrics 64 and 65 llO land sti-'aps 05 and 07, the a'erticel-ly reciprocating knife blocks 68 and 69, slidablym-ouiit- Ved in' suitable :guides '70 and Tlrin .the -end trames. Preeralythe cuttingiuechaiii "s are adjustable toward endiroin each otner `tor the purpose of accommodating packs `varying in wit th i'or trimming it'heeoges oi packs of different .wir -ths to torni sections of `iarious lengths. As shown in the drawings, the end frames 460 may 'be iiiedl-y mounted Iupon the base l0 and the end frames 61 are mounted for adjustment transversely of the path otinovement oft-lie packs, being mounted to slide in horizontal tracks T2, secured to the vbase 10, and provided with screw :op-

erated adjusting means consisting of screwV shafts 7 mounted for rotation in the slides.

The outer ends `of the shafts 73 `are provided with bevel gears 17st meshing with gears 'f5 tast :to afshat't .76 journal'ed iii brackets .77 carried by the tracks 72. A hand wheel. 73 vfastened vfto'the shaft T6 provides means whereby Ithe. latter ina-y be rotated, thereby to Vrotate 'the screw shafts 7.3 to eii'ect adpistnient of the cutter housings 61 toward Yand fawa'y from the cutter housings 60.

'The successi-ve .sections vwhich yhave abeen cut from the pack by means of the knife22 oftlielevers 80 .are provided with rollers or .other contact members S1V adaptedto Vengage :opera-tively with the surface of cam-s :82 'on the` shats 62 v.and 63. The arrangement is such that -as'tlie sections of the pack are car'- ried between the knives 59., the-stopmembers rbe brought into the `pat-h of the cut sections-,fther-ebytoeiigage and square the end of the section being fed into position with respect to @the knives. Side positioning inembers f83 `are :piinoted upon `tutor-.um members VSii :carried by the `end vtrames 60 and 161,fthc upper ends'of theleiners 83 ,ha iiigcontact Ydevices L85 adapted 'for contact 'with `cams `8G lonlsliaits 62 Vvand 63..A The side: positioning members k83 are thus moved `inwardly fsimiiltaneoiisl-y to position and lcenter the .sec-tion 'of the pack with reference rto. the knives `59.V

The sections 'thus centered are held in Vthis positiom-tightly against fthe stop members 79, 'by means oa positioning member 87. pivotallysupported from the .end framesdand '61, forinstance 'fas eby ihai 188'. vThe positioning '587 `operatu-wely connected, as by a,

link 89, with a bellnanklever') or other device having operatiye association with :a cam 91 mounted :lon :the shaft `14 (see `Figs. `l andz). Thus it will be clearithatjthe -cut sections willbe Icentered;a'iid.=so-'held during the Atrim-ming of :their longitudinal edges.

For :the purpose of conveyin'gthe rout .sections ofthe pack-,tothe edge :cutters 59and then delivering themto a suitable support @or conveyor, Ifhave provided va .conveyor192',=eX tending forwardly under Vthe presser ydevice '50 .and rearwardly past the cutters 59. The .conveyor may .be of any :suitable construction adaptable for the purpose, vand'preferaloly is oftheendless type. As shown, the endless -conveyor'92 is trained over an 4idfle .pulley 93 journaled on the end 'frames 1.3 otthevtransverse shears, and :aflsovover a rear driven pulley 194 to the rear of lthe vlongitudinal shears. The driven pulley -9 1is designed to be intermittently rotated, and as shown (Figs. 1 and 2)'it is connected by gearing 95 to a stub shaft 96 supported in-.a'bracket v97. The stub shaft Y96 is actuated by means ofa suitable operative connection,sueh as Aa crank 98 and lever 99 connected, preferably thi-ough a ratchet and gear lconnection V100 similarto that which operates the feed rolls y25 to permitot rotation only in one direction 'to feed the work forwardly. Preferably the. vconveyor 92 is moved'interniittently and .in :syn-

lchr'onism'wit'h the Jfeed rolls 25, and forthis purpose all of` the several mechanisms'fare driven by means of :gearing connectedv to a (50111111011 SONIC@ OfpOVel.

In theembodiment of the. invention :illus-`.f

ti'ated in the drawings, power is Aapplied to rotate the pulley or gears vlwadapted to periodically drive the powerlshaft i15=througli the medium' of Lthe clutch 17 which eis'funder the control oit the operator.l Thek power Vshaft .15 is adapted to drive the yshaft 14 :traine 61 and is capable ofmovement longi- "tudinally of the shaft 101,1so as to drive the A shaft 63 in any of they adjusted positions ofthe frames icrosswise of the machine.

in cutting the pack-s tr isver-sely. into sections according to Vmy oit-en small; ends :or seetions'iemaiiiing te machine between- 4the feed '25 the anvil 24C `which are .too nar f L For ythe 'purpose oi' olea- "iig machine, .of thesepieceso sci'ap, Iilrarve prei ded anrejee- `tor ba'r'105 (ses Figs. 1,"2zrn'd "harming a "entioin, there Vare to be used iso forwardly'curvednger adapted to extend between the spaced feedrolls 25 and rolls 28.k The ejector bar 105 (see Fig. 7) is supported by one end of a lever 106 fulcrumed on a shaft 107 carried by the end frames 13, and the other end is provided with a contact device for contact with an actuating cani 108 mounted on the shaft 14. As is clearly illustrated by dotted lines in Fig. 7, rotation of the cam 108 permits the ejector bar 105 to move downwardly and forwardly whereby the finger may be moved forwardly between the feed rolls 25 and rolls 28 to discharge any remnants of the pack through the opening between the frames. The ejector bar 105 -is also used for moving forward and hold1 ,ing the last section against the gauge stop 49 after it has passed through the feed rolls.

The operation of the machine for cutting off and trimming and squaring sections is illustrated in Fig. 1l. A' hot mill pack A is shown as it isV delivered from a mill, showing to an exaggerated extent the curvature and camber produced by rolling. The pack is delivered to the shearing machine upon the feed table 11, where it is ready to be fed to the cross-cutting shears ina direction parallel to its longitudinal edges. The ylatch 45 is tripped to release the lever 40 to permit the stop member 39 to fall into the path of the pack where it will limit the initial feed of the pack for the purpose of trimming one end -B thereof squarely with a minimum of waste. Further rotation of the cam shaft 14 actuates the contactmember 41 to lift the stop member 39 out of the path of the pack, to permit the feed rolls 25 and 28 tofeed the pack into the machine` ay Vpredetermined distance or until the pack is stopped by the stop members 49. Continued rotation of the shaft 14 actuates the cutter head 19 to cut the pack transversely to form the first section C (Fig. 11) of the desired length. During the cutting of this section the pack is held in its flattened condition by means of the pressers 23 and so as to insure a squarel cut of the pack. Next the cut section C is carried forwardly 'between the housings 60 and 61 by the inter'- mittently moving conveyor 92, and is accurately centered between the knives 59 by l the stops 79, side positioning members 88 and clamp 87, as has heretofore been described. The ensuing descent of the knife blocks 68 and 69 clamps the section C along the side edges of the pack, which are then trimmed square with the previously cut ends, as shown at D in. Fig. 11. The successive sections of the pack thus produced are now ready for the finishing of the sheets.

By referring to Figs. 9 Vand 11,A it will be apparent that a. considerable saving of niaterial is effected by first transversely cutting the packs according to my method instead of first'trimming the packs Vlongitudinally as indicated in broken lines at E, as has heretofore been done in machines of the combination type.

Advantages of theinvention in first cutting the pack transversely into sections are, first, the reduction of the extreme chordal distance in a bowed pack, thereby practically eliminating the longitudinal bow and curvature of the cut edges of the sections; second,.the prevention of the separation of the sheets during the cutting; and third, the production of sections of maximum size from cambered packs. Furthermore, the invention is advantageous in that the packs are fed through the machine and maintained in position for taking straight parallel cuts automatically notwithstanding the bow and camber of their longitudinal edges. The machine is capable of handlinga large amount of work, in a rapid manner, producing rectangular sections of accurate, dimensions with a minimum of waste.

In the lclaims the words width and length are used to indicate the two dimensions of the finished sheet irrespective of which may be the greater, asthe transverse dimension maybe either greater or less than the longitudinal dimension of the cut packs.

1. The method of shearing cambered hot mill packs of sheet metal. which comprises cutting the pack transversely into sections of desired length and thentrimming the side edges of each section square to the previously cut transverse edges.

2. The method of shearing cambered hot mill packs of sheet metal which comprises first trimming one end of the pack transversely to form a squared end, cutting the pack transn verselyinto sect-ions of'desired length, and then trimming the side edges of the sections.

3.' The method of shearing hot mill packs Vof sheet metal as they are delivered from a mill and which are cambered in the direction of the length, which comprises first cutting the packs transversely on parallel lines to provide sections of packs of desiredsize, and then trimming theside edges of thev sections to Vsquare them with the transversely cut edges.y Y:

4. The method of shearing hot mill packs of sheet metal having curvature longitudinally` as they are delivered'from the mill, which comprises cutting the pack transversely into sections, therebyl to decrease the waste effective curvature in each section, and then trimming the side edges of the sections to lform sections of desired size and shape.

5. The method of shearing hot mills packs of sheet metal, which comprises 'moving the pack .in a direction parallel to its longitudiy6. -The method of shearing hot mill packs of sheet metal', which comprises moving the packin va direction parallelto itslongitud'ina'l azis, cutting'the pack transversely to square and' trim one end' thereof, shearing' the pack transversely p to form sections of desired, length, andi then trimming' the sideredgesA of the' sections' to form sections of desired" width, v y

7.l The method of shearing hot millfpa'ck's of sheet? metal, which comprises intermittentlymoving the pack inl a direction parallel to its longitudinal'axis, shearing the packltransversely to i'orm sections oi' desired length', and then trimmingthe side edges of the sections at right angles thereto to form sections of desired width.

The method of shearing hot mill packs' o-sheetmet-al, which comprisesA progressively trimmingone end' of the pack to' square it, cutting the pack transversely ony lines parallel-toi saidV end cut into sections of' desired length,centering the cut sections individually inposition for trimming the two side edges of the same and then trimming their side edges to form squared pack sections.

9; A2 shearing machinefor hot mill pac rs ofsheet metal,comprising af transversely arranged shearing means and longitudinally arrangedgshearing means' disposedrearwardly of said first' named shearing means', means for advancing ythe pack a predetermined disstanceaccording tothe length of the section tobe-cut, thereby` to presentthe pack to thev transverse shearing means to cut the pack into1seetions,and cooperating meansior advancing the cut sections to the longitudinally arranged shearing means for trimming the side edgesof the sections. v

10; shearing machine-for hotinill packs ofsheet met-al comprising aplurality' of shearing means, means for advancing the packtolone ofthe shearing means Jorcutting the pack transversely into sectlons of desired length,` and cooperatingme'ans for separately advancing the individual'sections to the other shear-ingmeans for independently trimming the side-edgesof the several sectionsfor the purposedescribed. Y i A 11a Afshearing 'machine tor hot mill packs orA sheet metal:V comprising. a plurality oil shearing'means, means vfor advancing-v the pack limited distance to present it :to one of the shearing means to trilnandsquare one end of the pack, cooperating' means' forsuccessively vadvancing theunc-ut portion ofthe pack' to saidshearing means according-to the length of the sections to beV cu't, means ri` or=p.re' senting'thecut sections to the othershe'aring means Sand means for actuating saidshearing means toA cut`the'x`p'ack' transversely into sections andtrim thei'r'side's. l

lf2. ik single shearingAmachi-ne for hot mill packs ofsheet metal co'mpri'singnie'ansf for moving the pack in a path parallel to its longitudinal edges, a shearing mechanisml arr ranged transversely' of sai'dpath, means for intermittently actuating said pack moving means to move the pack step by step to' the shearing means for repeatedy crosswise severing' thereby, andy means for limiting `the initial movemei'itof thev pack, whereby actua'- tion ot the shearing mechanism cuts ii ai small amount 01'* metal4 for' the purpose of trimming ands squaririg' the forward end of the pack. 4, v

13, A shearing machine for hot mill packs of sheet metal comprising means for initially guiding thepa'ck in a; path parallel to its longitudinaledges, a shearing mechanism arranged transversely et said path, means for intermittently moving the pack toward the shearing means, means for limiting the' initial movement of' the pack", y whereby actuation of the shearing' mechanism cuts ott'l a narrow strip for the purpose of trimming and squaring the pack, and means operating repeatedly after the initialv cut to'- move the pack a distance equal tothe length of'V the sectionjto befformedEwhereby repeated actuation of the shear'oper'ate's tocutL the packiiito a pluralityof sectionsof desired length.

14. A shearing machine for bowedhot mill packsy oi' sheet-'f' metal comprisingl intermittently operatingmeans for moving the pack in a'path'parallelfto its `longitudinal edges, `a shearing mechanism arranged'- transversely of said path, adjustable means operatingin connection with saidpack moving means for stopping Vthe movement of the-pack; with its forward endl at different'distances from said shearing mechanism, andmean'sfor repeatedly actuating saidshearing means during periods of rest ot said packv moving means, whereby a small amount of metal may first be cut ofiE from one endet the vpack to square it, and the pack then cut into a plurality of sections of desired length; v

15. A shearing machine for bowed hot mill packs oi sheet metal comprising' means for moving the pack in a pathparallel to its longitudinal edges, a shearing'mechanism arranged transversely ci said'path, means for intermittently actuating said" pack? moving means tovadvance the packa predetermined dista-nce according'to the lengthV ofthe sections tolhe cut', andsheet-engaging means lfor restraining the initial movement of the pac-k to present only af short Vend tothe shearing mechanism for the purpose oi trimming one end of the pack.

16. In a' shearingv machinev for shearing bowed hot mill packs ofsheet metal into sections V.of predetermined'length'prior to trimming their `longitudinal edges, a reciprocatory cutter head, means for intermittently 'reciprocating' said cutter head, means controlledhythe jhrst mentioned means for moving the pack forwardly under-fthe cutter head Ai ne' apredetermined. distance according to the length of the sections to be cut, and means for maintaining parallelism of the successive cuts.

ting them into sections of desired length, and

means operable at the option of the operator for restricting the initial movement of the packs into the machine.

18. ln a shearing machine for shearing hot mill packs of sheet metal into sections of predetermined length, comprising a reciprocating cutter, a rotatable shaft, means connecting said shaft and cutter whereby rotation of the shaft will reciprocate the cutter, feed rolls and gearing connected to said feed rolls and actuated by said shaft Vfor rotating said feed rolls to feed the pack forwardly a predetermined distance, a stop member movable into and out of the path of said pack to restrict the initial movement4 of the pack, means on said shaft for actuating said stop member to move it out of the path of the pack, and means for normally holding said stop member in inoperative Position.

A19. In a machine for shearing hot mill packs, bowed longitudinally and transversely, transversely into sections of desired width, in combination, means for feeding the pack forwardly into the machine, shearing means, means for flattening the end ofthe pack forwardly past the shearing means,.an actuating shaft, and means whereby said shaft actuates all of said means to progressively feed the pack past the shearing means a predetermined distance according to the length of the section to be cut, flatten the end of the pack forwardly of the shearing means and then shear the pack transversely.

E20. ln a machine for shearing hot mill packs, bowed longitudinally and transverse- Lf, transversely into sections of desired ength, in cembination, means for feeding pack forwardly into the machine, shearg means, means for flattening the end of the pack forwardly past the shearing means, said last named means comprising a vertically reciprocab'le presser plate, and means fer movin@- said plate to release the pack for feeding.

21. In a machine for shearing hot mill packs transversely into sectionsof desired length, in combination, means for feedingl the iack forwardly into the machine, shearing means, means for flattening the end of the pack forwardly past the shearing means, said last named means comprising a vertically re- .cipro-cableV presser plate, and a stop member carried by the presserplate and movable into the path of movement of said pack for limiting the forward movement thereof.

" ln a machine for shearing hot mill packs intoisquared sections o'fdesired length comprising means for Atransversely shearing the pack into sections, means for longitudinally shearing the edges of the sections to square them, pack feeding means for advancing the pack forwardly past the first pack shearing means a predetermined distance, and other feeding means adapted to advance the sections of the pack to the second shearing means for operating the two feedingmeans synchronously.

23. In a machine for shearing hot mill packs into squared sections'of predetermined length comprising means for cutting the packs transversely into sections, means for advancing the sections to a shearing mechanism for trimming the side edges of the sections, and means fer locating and holding said sections squarely with reference to said trimming mechanism, whereby to cut squared sections of predetermined size.

24. In' a machine for shearing hot mill packs into squared sections of predetermined length comprising means for cutting the packs transversely into sections, a second shearing mechanism spaced-from said first mentioned shearing mechanism and disposed at right angles thereto for trimming the side edges of the sections, means for advancing the sections to said second shearing means, stop means for limiting the advancement of the' respective sections with reference to the shearing mechanism and for squaring one previously cut 'edge'with said shearingmechanism, and means for holding said sections in squared position during the trimming of the side edges thereof.

25. In a machine for shearing hot mill packs into squared sections of predetermined length comprising means for cutting the packs transversely into sections, a second shearing mechanism spaced from said first mentioned shearing mechanism and disposed at right angles thereto for trimming lthe side edges of the sections, means for advancing the sections to said second shearing means, stop means for limiting the advancement of Athe respective sections with lreference to the shearing mechanism and for squaring, one previously cut edge with said shearing mechanism, and means for engagingand clamping the sections at theends thereof to hold them in squared position during thev edge trimming operation.

2G. In a machine for shearing hot mill packs into squared sections of predetermined length comprising means forfshearing the pack transversely to form` therefrom sections of desired length, spaced parallel means for shearing the sections in a direction at right angles toA said first shearing means to trim the side edges ofthe pack, means for operating both of said shearing means in synchronism, means for moving the sections cut at the j first shearing mechanism to the second shearing mechanism, stop means for limiting the movement of the sections with'respect to t-he second shearing mechanism, and positioning means engaging the sides of said sections for positioning the pack centrally between the spaced shears of the second shearing means.

27.V In a mechanism for trimming the side edges of sheet metal packs previously cut to desired width, means for intermittently moving the sections in a direction parallel to the direction of the length of ythe pack, shearing means comprising spaced shears disposed on opposite sides of the moving means, means engaging the ends of the sections to position them for engagement by said shearing means, and means engaging the side edges of the respective sections to position them centrally between the spaced shears.

2S. In a mechanism for trimming the side edges of sheet metal packs previously cut to desired length, means for intermittently moving the sections in a direction parallel t0 the direction of the length of the pack, shearing means comprising spaced shears disposed on opposite sides of the moving means, means for adjusting the shears toward and from each other, means for positioning the sections endwise between said shearing means, and means engaging the side edges of the respective sections to position them centrally between the spaced shears.

29. In a mechanism Jfor trimming the side edges of sheet metal packs previously cut to desired length, means for intermittently moving the sections in a direction parallel to the direction of the length of the pack, shearing means comprising spaced shears disposed on opposite sides of the moving means, means engaging the side edges of the sections to position them centrally between the spaced shears, means Jfor clamping the sections between said shearing means, and common means for actuating said shears, positioning means and clamping means.

30. In a mechanism for trimming the side edges of sheet metal packs previously cut to desired length, means for intermittently moving the sections in a direction parallel to the direction of the length of the pack, shearing means comprising spaced reciprocable shears disposed on opposite sides of the moving means, a stop member movable into and out of the path of said sections to limit the movement of the sections forwardly, positioning means adapted to engage the side edges of the sections to position them centrally between the shears, and a common shaft for reciprocating said shears, and actuating said stop member and positioning means.

31. The method of shearing a hot, longitudinally, laterally curved mill pack of sheet met-al to produce sections therefrom which comprises subdividing said pack transverse- In testimony whereof, I have signed myv name to this specification. Y

JOHN w. FREE.

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