US1799483A - Method of and machine for making one-piece mop heads - Google Patents

Description

PIECE MOP HEADS April 7, 1931.

w. A sMrrH METHOD OF AND MACHINE FOR MAKING ONE- 4 Sheets-Sheet 1 Filed NOV. 7, 1928 7, 1931. w. A. SMITH 157999433 METHOD OF AND MACHINE FOR MAKING ONE-PIECE MOP HEADS Filed Nov. 7, 19 28 4 Sheets-Sheet 2 p 7, 1931 I W. A. SMITH 1,799,483

METHOD OF AND MACHINE FOR MAKING ONE-PIECE MOP HEADS Filed Nov. 7', 1928 4 Sheets-Sheet 3 April 7, 1931- w. A. SMITH ,79%4

METHOD OF AND MACHINE FOR MAKING ONE-PIECE MOP HEADS Filed Nov. 7. 1928 4 Sheets-Sheet 4 J .7 M 79 6/ w w Patented .Apr. 7, 1931 earn Fries WALTER A. "SMITH, ILLINOIEt, ASSIGNOR '10 STOVER MANUFACTURING "& ENGINE. CO.,%OF 'FB.

JIEPOET, ILLINOIS, A CORPORATION OLE ILLINOIS METHOD OF AND MACHINE FOR, MAKING ONE-PIECE MOP HEADS Application filed. November mop heads of the kind shown in'my co-pending application, 'Serial No. 283,153, filed June 6,1928. I

Mop heads were at one time made in the form of castings, but for many years have been made of sheet metal for better serviceability. The sheet metal mop heads were first of inulti-part construction with the parts rivetted or otherwise suitably fastened together, but they were found to be objectionable for various reasons, and there has, therefore, been a demand for a serviceable one-piece head. A few different forms of one-piece heads ap- 2o p'eared' on the market but apparentlythey left much to be desired, and were furthermore a difficult proposition to manufacture, requiring'in addition toithe'blanking operation, a v. series of forming or bending operations.

The greatamount of handling thereby necessitated discouraged quantity production and involved a high labor cost. Moreover, the product was bound to lack uniformity because of the inabilityto place the work accurately in the dies by hand, especially with quantity production as the objective, and, of course, a'certainpercentage. would have to be scrapped on failing to pass inspection, the necessity for repeated inspections being likewise an objectionable featurefrom the standpoint of cost of production. Then, too, there has to be considered the fact that the handling of irregularly shaped pieces, besides being slow, is bound to be dangerous, and injuries frequently resulted. r

The principal object of my invention is to provide a new and improved method and machine for the quantity production of sheet metal parts of thekind referred to, or any parts the characteristics of which would 7, 1928. Serial No. 317,828.

otherwise require successive forming operations, and contemplates the use of spec al double-actlng dies in an otherwise conventional punchpress coperating insuch man- 7 ner' that the sheet metal blanks are arranged to be fed one at a time to the press and formed up completely in one operation of saiddies as distinguished from the two or more separate operations heretofore required.

Still another object of the invention has reference to the manufacture of sheet metal parts of the kind-referred to which does away .with the necessity for drawing the metal, where to do so would mean objectionable weakening of the part, if not its rejection at the time of inspection, so that the durability of thepart is not sacrificed in the speedy production thereof, but instead is greatly improved over what was heretofore obtained.

Still other objects, not enumerated at this point, will appear in the course of the following detailed description, in which-reference is made to the accompanying drawings, where- Figure 1 is aside view on a small scale of a punch press modified in accordance with my invention for double-actuation ofthe dies in a predetermined desired timed relation;

Fig. 2 is a fragmentary central vertical section of the machine on a larger scale;

Fig. 3 is a transverse sectional detail on the line 33 of Fig. 2;

Figs. 45 and 5 are respectively a plan view of the lower die with its holder and feeding guides, and an undersideplan View of the upper die and its holder;

Figs. 6, 7 and 8 are enlarged fragmentary sectional details on the lines 66, 7-7, and 8 -8 of Fig. 4 respectively, Fig. 9 being a view similar to Fig. 8,,showing the auxiliary lower die at the upper end of its stroke to complete'theforming operation;

Fig. 10 is a composite View showing 1n full l nes the comp etely f rmed m p hea n i in dotted lines the blank from which the same is formed, and

Fig. 11 is a perspective view of the mop head to give a better idea of the shape thereof.

The same reference numerals are applied to corresponding parts throughout the views.

Before proceeding with a description of my improved machine method of making the mop head, reference should be made to Figs. 10 and 11 for an understanding of the principal features or characteristics thereof. As described in my application referred to above, the mop head, or mop head jaw as it is sometimes called, designated by the reference numeral 12, is formed from one piece of sheet metal, originally in the form of a generally triangular-shaped blank represented at B, No. 18 gauge sheet metal being found satisfactory for the purpose. The head has a slightly tapered socket formed therein to receive the lower end of the handle spindle, said socket comprising oppositely bent semicircular but slightly tapered strap portions 13 and 14 and lower sen1i-cylindrical but slightly tapered socket portion 15. The strap portion 14 is defined by shearing of the metal of the blank along substantially parallel lines 16 and 17, and this portion, as well as the portions 13 and 15, are produced mainly by a. forming operation. The strap portions, of course, are integral with the rest of the head at their both ends, and the socket portion is integral therewith on the three sides thereof. The lower end of the socket portion 15, which is formed by drawing, as will present: 1y appear, provides an end thrust seat for the handle spindle which aids in establishing a firm and solid connection between the handle spindle and the head. A hole 18 is pierced in the blank B in the blanking operation so that a nail or other fastener can be used to fasten the head to the handle spindle. The head constitutes the stationary jaw with which the usual form of bail is arranged to cooperate to hold the mop or swab. A central, transverse, angular flange 19 is formed by bending a marginal. portion of the lower edge of the blank B along the line 20 between notches 21. Two end flanges 22 are bent in angular relation to the plane of the rest of the head in the opposite direction from the central flange 19 along lines 23 between the notches 21 and notches 24 formed in each end of the head. The flange 19 and flanges form a bail-receiving groove in addition to affording reinforcement of the lower end of the head from end to end thereof such that there is little danger of the head being bent to the extent of throwing the groove out of alignment with the bail. The bail is received in the notches 24 between the ends of the flanges 22 and guide lugs 25 formed at the opposite ends of the head, the latter being struck into offset relation with the plane of the rest of the head along the lines 26 exaction of tending away from the notches 24 so that the bail received in the notches 24 has its cross piece in proper alignment with the groove formed by the divergence of the flanges 19 and 22. Bibs 27 are formed in the head to reinforce the same across the narrow end portions which might otherwise have a tendency to bend when the mop is subjected to rough treatment. So much for a description of the characteristics of the mop head, the making of which the present invention is particularly concerned with. T will now proceed to a description of the method and machine for making the head.

Referring now to the other figures of the drawings, the punch press shown in Fig. 1 has a frame 28 rising from a base 29 inclined rearwardly at an angle of about thirty degrees to the vertical. The ram 30 of said press is recinrocable in guides 81 provided therefor the frame 28. Beds 32, extending wardly from the ram through guides 33 s roller 37 mounted on the ram 30, the cam riding on the periphery thereof whereby to comm ca movement to the ram against the its springs 34 through a uniform at the lower end of which the ram is caused to pause throughout approximately ninety ,degre s rotation of the shaft 36 as determined by the dwell on the cam 35. The shaft 36 has 38 arranged to be clutched therewith to turn the same in a clockwise direction, indicated by the arrow in Fig. 1, the gear 38 being driven by a pinion 39 on a cot sershaft 4O driven in any suitable man nor, as for example, by a pulley 41 mounted on said shaft. Another cam 42 is mounted on the shaft 36 and cooperates with a roller 42 mounted on a rocker arm 43, the cam operating 0 the per'phery thereof. The arm 43 is pivoted at 44 on the frame 28 and has a pull rod 45 connected therewith and extending downwardly therefrom to the base 29 for connection with arm 46 mounted on the end of a shaft 47 received in bearings in the base 29. Another arm 48 is mounted on the shaft 47 v ithin the base 29 (see Fig. 2), the free end of which is formed for cooperation with an. opening 49 in a slide 50 reciprocable in ways 51 on bracket 52 mounted in the base 29. The slide 50, the purpose for which will presently appear, is thus arranged to be reciprocated in timed relation with the ram 30. The angular relationship of the cam 42 with reference to the cam 35, which best apstroke,

pears in 1, is such that the reciprocation of the rain 50 occurs near the end of the pause of the ram on the lower end of its stroke. As will presently appear, the ram 30 has brought the main dies together and completed the ,major portion ofthe forming operation. before the slidehO- comes .into play to operate .auxiliarydies rto .finish the forming operation, ,the timed relationship .in the operation of said di-esbeing. of tgreat'importance from the standpoint .cf "avoiding the slightest possibility of fracturing ,the-E blank at any point .by drawing thereof i the :mop

headwbeing produced ,p-ractically entirely by guide pins, extending ffromone .diesholder to theother and serving toIinsu-re accurate register of-the. die. impressions, ,are s'hownat 59. The blanks Bare lfed :tothe pressione by one fromin frontithereofi'between guides .60. .The gblanks slide downfinclinedztracksol provided on a table 262. carriedlib-y the dieholder 57. Adj ustable stops 63 llimitrthe movement of th-eblankby, engagement at each endthereof when the blankarrives. at a .position .over the lower-die 54. The stopsfiS thereby also line up the blank with thedies. Auxiliary guides 64 at either I side -01 ,the die :54 cause the blankrto be shifted Llaterallyone avay or the other into precise register .with ithe dies, audit will benoted that theguides 64 are set atLa slightangle sothey converge rearwardly, and if the blank isofl'rside eitherway, theend thereof will ride on .the guide 64; and.the blank willbe sure tobe truedup. ln Fig. .Qazblank B is shown in dottedalines slidingon. the tracks 61,: andanother blank LB is shown in dotted linesov-er the EIOVVQI' die .in engagement with the stop '63, but. it-will beunderstood thatthis is merely :for the ,purpose .of illustration; only one blank'will be cted to-the press at .a time. It isalsowitha view tobetterillustrati-on that I have resorted to ,the showing .in dottedlines ofa formed-upblanlrB inrtheact of beingejected from theupper die53. dVhen the blank comes .into engagement Withthe stops 63;.itrests in a position parallel with the lower die 5.4 on pins 65, ofwhi'ch thereare four, slidably 'received in holes "16.6 in the lower. die-54 and.having-compression springs 37:- serving;-n ormally ,rtdholdthesame exten ded a definiteamount determined \by. the en gagement or the heads68aon ,said g-pins with theannular shouldersnfit) defining the ends of the horesfYOin whichthesprings .67 and the headed .ends ,of.,said 1mins are received. The

pins will, of course, yield when-the dies fromthe upper die impression asshownin These pins are not, however, -rar- 1 Fig. 2. ranged to be held-extcnded'by springs like the pins 65, but are mounted on a head "7:3 (see Fig. 2) which, when the ram 30 is "retracted,-' is .arrangedto be struck by a lever 7 4ton1ove the pins 72 positively to'extended position. .Thellever 7 4 ispivoted on theram .at 75 and has one end thereof arranged to beengaged bya screw 76-mounted on apart 7'Zlixed on the frame 28. The frictional fit ofthe pins-'71 in their holes '72and also the tendency for the forme'd-upbla'nk :tUStiGl? in the upper-die impression isenough to-prevent the ejection of theFblank from the wupper the 53 before the ram '30 arrives atnor near its fully retracted position. .An air nozzle =78, communicating with a compressed air line, hasa valve (not shown) arranged to be opened onieachup stroke of-thera1n30 so that .a blast of air serves tdthrow-theiinished blank to :the rear -thewmoment :it is 1 course, of corresponding depth. Fore and aft with respect to: the recess 80, andonthe same median line -therewith,the die"53 has a pairof substantially cylindrical butalso slightly tapered projections 81 and "82, the mating die 54 being provided with recesses 83 and '84 to receive the same. Thus, cooperating shearing-edges are provided "at a and?) on the dies53-and 54 respectively :to cut the'blank B along the lines -16 and 17 so as to form the strap portion '14 on the .proj-ection 7 9 and'to formv-the strap portion 13 on theprojection 81. The outerend-ofthe Ill) projection 82 isbeveled-ofi asshown at 85,

and it is partly by the projection 82 and partly by its beveled ofl-e'nd85 that the-substantially semi-cylindrical but slightly tapered socket 15 is formed in the-blank. (Dbviously,the blank is held between the pins 65, and7liduring the shearing alongi-the lines 16 and 17 and during the first stages-10f the forming of the strap andsocketz' portionsre ferred to. The holding of the blank by the pins does not amount to a positive gripping, as should be evident from the foregoing description, hence, the stock is perfectly free to flow, as it were, or, more specifically, be gathered in from both sides of the blank to Ward the central butt portion where the strap and socket portions are being formed and where, of course, additional stock is needed, since the fashioning of the blank does not rely upon drawing of the stock. Thus, the extra width of stock provided in the butt portion of the blank, as appears in dotted lines in Fig. 10, is taken up or absorbed in the forming of the strap and socket portions 1315, and this gathering in of the stock brings into line the ends of the blank which theretofore extended in diverging relationship, as also appears from the dotted line showing of the blank in connection with the full line showing of the completed Inop head in Fig. 10. There is substantially no drawing of the stock except only to a very small extent in the closed end of the socket portion 15. The latter point is evident in Fig. 6 and also in Fig. 10 where it appears how the stock is drawn slightly from the line of cut 17 in the forming of the socket 15. Slightly previous to the comple tion of the forming of the strap and socket portions 1315, the blank encounters a ridge 86 provided on the lower die 5-1 in transverse relation to and defining the end of the recess 84, and arranged to cooperate with this ridge is a groove 87 formed in the upper die 53 just in front of the projection. 82 so that the flange 19 is formed on the edge of the blank. Now, it should be evident that the gathering in of the stock has oc curred before the forming of the flange, so that there is no danger of the flange tending to be distorted because of drawing of the stock subsequent to the forming thereof; all of the stock needed, or substantially all, has been gathered in before the forming of the flange 19 commenced. At either side of the socket portion 15 where the blank is left perfectly flat, the balance of the flange 19 is formed between the chamfered portion 86 of the lower die 54, which is a continuation of the outer face of the ridge 86, and a surface 87 which is an extension of the outer side of the groove 87 (see Fig. 7 Simultaneously with the forming of the flange 19, the guide lugs 25 are formed by somewhat similarly shaped die projections 88 on the upper die 53 and recesses 89 on the lower die 54 (see Figs. 1 and 5), and it will, of course, be evident, since these guide lugs are not formed until the forming of the strap and socket portions 1315 has been practically completed. that there is no drawing of the stock and consequently no danger of fracture thereof. All of the forming of the blank, or at least the major portion thereof,

it will be seen, is downwardly and yet with the mating die impressions so arranged that no two parts are permitted to grip the blank therebetween before the substantial completion of the forming of the strap and socket portions. There is, however, a slight drawing of the stock to form the ribs 27, the lower die 54 having correspondingly shaped projections 90 thereon for forming the ribs 27 by drawing of the metal up into registering recesses 91 formed in the upper die 53. When the dies 53 and 54 have been brought together as shown in Figs. 7 to 9, to within a clearance equivalent 'to the stock thickness, it will be evident that the mop head has been formed completely with the only exception of the two flanges 22 which have to be bent in the opposite direction from the flange 19. The reasons why it is not feasible to form the flanges 22 in the same way and at the same time as the flange 19 are, first, that the projections and recesses that would have to be provided on the upper and lower dies to form the flanges 22, similar to the projections and recesses provided on the dies for the forming of the flange 19, would commence to grip the blank at its opposite ends so that the stock would not be free to become gathered in for the forming of the strap and socket portions 13-15, experience having shown that the blank would fracture under such circumstances at the ends of the straps 13 and 1 1 and at the sides of the socket portion 15; and, second, that the cooperative projections and recesses that would have to be provided on the upper andlower dies to form the flanges 22 would serve to bend the blank upwardly at one side of the notches 21, while the projections and recesses 8687 and 8687' for forming the flange 19 would be tending to bend the blank down wardly at the other side of the notches 21,

while the body of the blank itself would be entirely without support, so that there would be nothing to prevent the tearing of the blank at each of the notches; the action would be almost equivalent to a shearing action but more like a tearing action. It is for these reasons that I prefer to complete the forming of the blank with the exception of the flanges 22 in the first part of the forming operation and then, while the blank is firmly held between the upper and lower dies by all parts excepting the portions from which the flanges 22 are formed, operating an auxiliary set of dies at the end of the forming operation to complete the mop head, as will now be described.

The auxiliary dies are those shown at 55. These dies are conformed with projections 92 arranged to cooperate with recesses 93 provided on the upper die 53, as best appears in Figs. 8 and 9, so that when the auxiliary dies 55 are forced up against the upper die 53 the flanges 22 are formed substantially as shown in Fig. 9. Obviously, thereis no tendency to tear the blank inasmuch as the same is firmly held between the upper and lower dies 53 and on both sides of the notches 21-. Furthermore, if, as a result of the forming of the strap and socket portions 1315,there is any tendency for a comeback of the stock at the ends of the blank, the forming of the flanges 22 will serve to positivelyprevent any such distortion of the mop head after it leaves the dies. The flanges 22 furthermore constitute a reinforcement such that there is little danger of the ends of the mop head gettingbent. The dies 55 are slidable in notches 94 provided therefor in the ends of the lower die 54. and through holes 95 and 96 providedrespectively in the die holder 57 and'bolster plate 58. The lower endsof the dies 55 are fastened to a cross head 97, which in turn is adjustably secured to the slide by means of bolt 98, Adjustment of the set screw 99 adjusts the projection of the dies relative to the lower die 54'. It has been pointed out above that the operation of the slide 50 occurs near the end of the pause of the ram 30 at the lower end invention so that anyone skilled in the art to which the invention relates will readily appreciate the various advantages which have been'enumerated. So far as the machineis concerned, it should be evident that the same is capable of a greatdeal of modification, and, onthe other hand, so far as the method is concerned, it should be evident that the practicing thereofis not limited to a machine. of the specific kind shown nor is it limited to the production'of thespecific product described. All legitimate modifications and adaptations are intended to be covered in the appended claims.

I claim:

1. The :method of making a sheet metal article, like a mop head, having a socket portion integral with the rest of the body portion, which comprises. the following steps,

first, cutting a generally triangular-shaped sheet metal blank, the base portion of which is destined toibe formed to a certain shape,

and the apex portion of which is destined to have the socket formed therein, the latter portion being provided of ample width to furnish sufiicient stockto permit forming of the socketsubstantially without any drawing, second, striking the blank between dies to form oppositely directed strap portions to provide a socket, without drawing but by using the additional stock in theapex portion, and third, thereafter forming the base:

portionto the desired shape.

2. The method of making a sheet metal I article, like a mop head, having a socket portion integral with the rest of the body portion, which comprises the following steps, cuttin a generally triangular-shaped sheet metal blank, the base portionof which is destined to be formedeventually-to certain. shape but is originally cut tov an irregular shape, and the apex portion of which is destined to have the socket formed therein, the latter portion being provided of ample width to furnish sufiicient stock to permit forming of the socket substantially without any drawing, second, striking the blanklbetween dies to form oppositely directedlstrap portions to provide a socket, without/drawing. but 3 using the extra-stock inthe apex portlon, the base portionin said second step.

being brought to regular shape readyfor forming, and, third, forming the base pore tion to the desired shape.

3 The method of making a sheet metal article, like a mop head, which comprises the following steps, first, cutting a sheet metal blank, one portion of which is. destined to have a socket formed therein and having, extra stock provided therein for the purpose-, anda second portion of whichis to be formed, to a certainshape, second, forming-a socket portion in the first portion between dies and without drawing of the stock but by using. the extra stock provided in said portion: for the purpose, and, third, forming the second portion of the blank to the desired shape after the substantialcompletion of the'forming of the socket.

4. The method of making a sheetzmetal article, l1ke a mop head, which comprises the following steps, first, cutting a sheetfmetal blank, one portion ofivhich is destined to have a socket formedtherein and-havingv extra stockprovided therein for the purpose, and a second portion ofwhich is to be formed to a certain. shape and is originally out to an irregular shape, second, forming, a socket:

portion in the first portion between dies and without drawing of' the stock but by using the extra stock providedin. saidiportion for the purpose, the second portion be.- ing thereby simultaneously brought to a regular shape ready for the forming operation to be performed thereon, and, third, formingthe second portion of the blank to the desired shape.

5; The method of making a one-piece sheet metal article, like a mop head, which. comprises the following steps, first, cutting a generally triangular-shaped blank offsheet metal, the apex portion" of the blank being 7 destined to have asocketformedtherein and being provided ofample width to furnish sufficient stock for the socket substantially without any drawing, and the base portion of said blank being destined to have aligned jaw portions formed thereon but being originally cut with the two ends thereof diverging downwardly with reference to one another, second, subjecting the blank to forming operation between dies so that a socket is provided by oppositely bent strap portions substantially without any drawing of the stock of the blank but by using the stock in the apex portion, the ends of the base por tion of the blank bein thereby also brought into substantial alignment, and third, forming aligned jaw portions on the base portion of the blank.

6. The method of making a one-piece sheet metal mop head, which comprises the following steps, first, cutting a generally triangularshaped blank of sheet metal destined to be a mop head, the apex portion of the blank being destined to have a mop handle socket formed therein and being provided of ample width to furnish sufficient stock for the socket substantially without any drawing, and the base portion of said blank being destined to have aligned mop jaws formed thereonbut being originally cut with the two ends thereof diverging downwardly with reference to one another, second, subjecting the blank to acutting and forming operation between. dies so that a plurality of oppositely bent strap portions are formed intermediate the ends of the blank at the apex thereof and simultaneously a socket portion which, together with the strap portions, constitutes a mop handle socket, all of the said portions being formed substantially without any draw ing of the stock, the stock being gathered in from adjacent portions of the blank to form the stock and said forming operation being attended by the straightening of the base por tion of the blank, and third, forming aligned jaw portions on the base portion of the blank after the substantial completion of the forming of said mop handle socket.

7 The method of making a one-piece sheet metal mop head which comprises the following steps, first, cutting a generally triangularshaped blank of sheet metal destined to be a mop head, the apex portion of the blank being destined to have a mop handle socket formed therein and being provided of ample width to furnish suliicient stock for the socket substantially without any drawing and the base portion of said blank being destined to have aligned bail-receiving jaws formed thereon but being originally out with the two ends thereof diverging downwardly with reference to one another, second, subjecting the blank to a forming operation to provide a socket using the stock in the apex portion and substantially without any drawing, the

ends of the base portion of the blank in the socket forming operation being brought into substantial allgnment, and third, forming aligned bail-receiving jaws on the base portion or" the blank.

8. The method of making a one-piece sheet metal mop head which comprises the following steps, first, cutting a generally triangularshaped blank of sheet metal destined to be a mop head, the apex portion of the blank being destined to have a mop handle socket formed therein and being provided of amplewidth to furnish sufficient stock for the socket sub stantially without any drawing and the base portion of said blank being destined to have aligned bail-receiving jaws formed thereon but being originally cut with the two ends thereof diverging downwardly with refer ence to one another, second, subjecting the blank to a forming operation to provide'a socket using the stock in the apex portion and substantially without any drawing, the ends of the base portion of the blank in the socket forming operation being brought into substantial alignment, third, forming an intermediate part of the base portion of the blank upon the substantial completion of the socket forming operation with a flange bent into angular relation to the rest of the blank to form part of the bail-receiving jaws, and fourth, after the completion of the above forming operations forming the ends of the base portion of the blank with flanges bent into angular relation with the rest of the blank in the opposite direction from the intermediate flange to form the rest of the bailreceiving jaws.

9. The method as set forth in claim 8, wherein the blank is formed with notches to define the ends of the intermediate flange on the base portion thereof, and which consists further in forming in the blank, at the same time that the intermediate flange is formed, a reenforcing rib at each side of the socket extending transversely with reference to said notches.

10. The method of making a mop head which comp ises the following steps, first, cutting a generally triangular-shaped blank of sheet metal, second, forming the blank with a flange on the base portion of the blank extending in angular relation thereto in one direction to constitute part of a bail-receiving groove, and third, forming another flange on the base portion of the blank in angular relation thereto and oppositely directed as regards the first flange whereby to constitute the rest of a bail-receiving groove.

11. The method of making a mop head which comprises the following steps, first, cutting a generally triangular-shaped blank of sheet metal, second, forming the intermediate part of the base portion of the blank with a flange bent in angular relation to the blank to form part of a bail-receiving groove, and third, forming the opposite end parts of the base portion of the blank with flanges bent in the opposite direction from the first flange 7 ing guides, and fourth,

into angular relation with the blank to form the complementary parts of the bail-receiving groove.

12. The methodof making a sheet metal mop head which comprises, rst, cutting a generally triangular-shaped blank of'sheet metal having notches in the base portion to define the ends of a plurality of sections destined to form bail-receiving groove flanges, second, forming the blank between dies so that a part 01" said sections are bent in one c irection into angular relation with the rest of base portion defining the ends of marginal sections destined to form bail-receiving groove flanges, the apex portion of the blank being provided of ample width to furnish sufiicient stock for a handle receiving socket and the base portion of said blank being conformed with the two ends thereof diverging downwardly with reference to one another, second, subjecting the blank to a shearing and forming operation between oies so that a socket is formed in the apex portion by oppositely bent portions of said blank formed sub stantially without any drawing or the stock of the blank but by using the extra stock allowed in the apex portion, the ends of the base portion in said operation being brought into substantial alignment, third, forming a part of the marginal sections of the base portion of the blank bent into angular relation to form part of a bail-receiving groove and substantially simultaneously forming the ends of the blank on one side of the end notches to form part of a pair of bail-receivtorming the rcst of the marginal sections of the base portion of the blank bent into angular relation with the rest of the blank in the opposite direction from that of step three to form the complementary part of the bail-receiving groove and likewise the rest of the bail-receiving guides.

14. The method set forth in claim 13 consisting further in forming reenftorcing ribs in the blank at opposite sides of the socket and in transverse relation with the notches defining the marginal sections of the baseportion oi the blank. V V I 15. In a machine of the character described, the combination with a base, a frame rising therefrom, and a ram reciproc'able in guides therein, of a lower stationary die, an upper movable die mounted on the ram, said dies having mat-mg pro ections and recesses for main cam in angularly retarded relation havingoperative engagement with the pin, and a stop arranged to be engaged by apart performing an operation on a sheet metal blank placed therebetween, an auxiliary die o cratin in a uide 0 enin arovided in the lower die, a slide mounted in guides in the base serving to operate said auxiliary die, ne main rotary cam for operating the ram,said' cam having a dwell thereon providing for a pause of the upper die onthe lower endol its stroke, an auX1liaryca-m turning with the therewith, and linkage operated by the aura iliary cam forcommunicating. movement to the slide in said case whereby to operate-the auxiliary cam during :the pause ofthe main cam on the lower end of its stroke.

16; In a punch press comprising a frame and 21V ram reciprocable inthe guides therein, 7

a lower stationary die, an upper movable'die mounted on the ram for movement toward and away from thestationary die, said dies Q, having mating projections and recesses, an ejector pin operating in a guide opening provided in the upper die, said pin beingarranged to be forced to retracted position when the dies are brought together and the work piece being arranged normally to stick in the'upper die when the latter is retracted from the lower die, and means for automatically moving the ejectorpin to extended position in the retracting-movement of said upperdie. v I -i 17 A machine as set forth in claim 16 wherein the last mentioned ineans-comprises a lever pivotally mounted on the raniand' ime of said lever at a certain point in the travel of said ram in the retracting movement thereof arranged to move the lever andzthereby move the pin to extended position so as to f rm;

eject the workpiece. j g Y 18. The method-of making mopheadcwhich comprises th Itollowing steps, first, cutting a generally 'tri'angular shaped blank ofsheet metal with notches provided in the base portion of the triangle, second, forming the blank with a flange on. the base portion between the notches and extending at an angle to the plane of the blank in one direction to provide part ot a bail-receiving groove, 1515 third, forming other flanges on the base por tion on the other sides of the notches in angular relation to the plane of the'blank in the opposite direction from the first flange to constitute the rest of a bail-receiving groove, and forming reinforcing ribs in the blank adjacent to and transverse with reterence to the notches. Y 19. The-method of making a sheet metal article, such as a mop head,--whic'h comprises the following steps, first, cutting a sheet metal blank of approximately the outlines of the article, second, producing abnormal sizedprojections onsaid blank by a forming operation, using the available fullness offm'aterial in the blank, and third, suitably fashioning the rest of the blank with the other desired projections of normal size.

20. The method of malt g a sheet metal article, such as a mop head, wlllCll comprises the following steps, first, cutting a sheet metal blank of approximately the outlines of the article, second, oroducing abnormal sized projections on said blank by forming as distinguished from drawing, using the available fullness of material in the blank, and third,"suitably fashioning the rest of the blanlr with the other desired projections of normal size, partly by drawing.

21. In a machine of the character described, the combination with a base, a frame rising therefrom, and a ram recinrocable in guides therein, of a st tionary die, a movable die mounted on the ram, said dies having mating projections and recesses for performing an operation on a sheet metal blank placed tnerebetween, an auxiliary die opcrating in a guide opening provided in one of the dies, a slide mounted in guides in the base serving to operate said auxiliary die, a main rotary cam for operating th ram, said cam having a dwell thereon providing for a pause of the movable die at the end of its stroke, an auxiliary cam turning with the main cam in an ularly retarded relation therewith, and lin age operated bythe auxiliary cam for communicating movement to the slide in said case whereby to operate the auxiliary cam during the pause of the main cam.

22. In a punch press comprising a frame and a ram reciprocable in guides therein, a stationary die, a movable die mounted on the ram for movement toward and away from the stationary die, said dies having mating projections and recesses, an ejector pin operating in a guide opening provided in the movable die, said pin being arranged to be forced to retracted position when the dies are brought together and the work piece being arranged normally to stick in the movable die when the latter is retracted from the other die, and means for automatically moving the ejector pin to extended position in the retracting movement of said movable die.

23. In a punch press comprising a frame and a ram reciprocable in guides therein, a stationary die, a movable die mounted on the ram for movement toward and away from the stationary die, said dies having mating projections and recesses, an ejector pin operating in a guide opening provided in the one die, said pin being arranged to be forced to retracted position when the dies are brought together and the work piece being arranged normally to stick in the die equipped with said pin when the dies are parted, and means for automatically moving the ejector pin to extended position in the retracting movement of said movable die.

24;. A machine as set forth in claim 23 wherein the lastmentioned means comprises a lever'pivotally mounted on the ram and having operative engagement with the pin, and a stop arranged to be engaged by a part of said lever at a certain point in the travel of nature.

WALTER A. SMITH.

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