US2478193A - Machine for working shoe uppers over lasts - Google Patents

Description

8 Sheets-Sheet 1 Jg sa wen fom Eric/' Holmgren, D60 d Gert rude A15/@Img ren, dmx. Ha rry E Fatt en, Decd ./Ya ry'or'z'eE .Pdf zen,/Idmx.

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E A HOLMGREN ET Ab MACHINE FOR WORKING SHOE UPPERS OVER LASTS Filed Sept. 4. 1947 9 w49. E. A. HOLMGREN ETAL gmvw MACHINE FOR WORKING SHOE UPPERS OVER LASTS Filed Sept. 4, 1947 8 Sheets-Sheet 2 hmm Mrs Eric A Holmgren, Dec/o7 Gorrucic /Ho/mgrc, Adm x.

Harry/Htten, Dec ci Nc: r'jom' e E a zf erg/ldmx.

Aug 9, 1949. E. A. HOLMGREN r-:TAL 2,478,193

MACHINE FOR WORKING SHOE UPPERS OVER LASTS Filed Sept. 4, 1947 8 Sheets-Sheet 5 {JH-*MTM /16 J6 ug. 9, W4. E. A. HOLMGREN EIT AL 2,478,193

MACHINE FOR WORKING SHOE UPPERS OVER LASTS Filed sept. 4, 1947 e sheets-sheet 4 408 40,3 404 GerrudcA.Holmqren,/1 Im x. 94, Ha rry B. Pa en, Decc! ug. 9, 1949. E. A. HOLMGREN ETAL 2,478,193

MACHINE FOR WORKING SHOE UPERS OVER LASTS a sheets-sheet 5 Filed Sept. 4, 1947 Inl/enfans* 2M 285 Gert rude /LHolng ren, Aclmx.

HarryB Pa tten, Decd Aug 9 1949- E. A. AHOLMGREN ET AL MACHINE FOR WRKING SHOE UPPERS OVER LASTS Filed sept. 4. ,1947

8 Sheets-Sheet 6 ]wen for Eric A. [fo/mgm n, Dec'a AHL um; n.. DA www Gul/.C

Aug. 9, 1949. E. A. HoLMGRx-:N E-r-Al. 2,478,193

MACHINE FOR WORKING SHOE UPPERS OVER LASTS Filed Sept. 4, 1947 8 Sheets-Sheet '7 9, 1949.. E. A. HOLMGREN ET AL MACHINE FOR WORKING SHOE UPPERS OVER LASTS 8 Sheets--Sheel 8 Filed Sept. 4, 194'? r11/@rz Iam' Eric AHoZmgren, .Deo Ge rf rude AHoZm gran, Adm/c.

Ha Pry B. Pazfen, Dec Nar/ome E Pa ten,/ldmx.

Patented Aug. 9, 1949 UNITED STATES PATENT OFFICE MACHINE FOR WORKING SHOE UPPERS OVER LASTS Application September 4, 1947, Serial No. 772,130 Y (Cl. 17a-7.6)

35 Claims.

This invention relates to machines for working shoe uppers over lasts, and is illustrated herein as embodied in a machine for pulling over the uppers of stitch-down shoes, a machine of that type being disclosed in United States Letters Patent 2,337,554 granted December 28, 1943, on an application flied in the names of E. A. Holmgren et al.

As in the machine disclosed in the above identifled patent, the machine illustrated and described herein is provided with a support for the work which comprises a last having an upper and a sole member mounted thereon, and with grippers adapted to seize the margin of the upper. A relative movement between the support and the grippers heightwise of the last, for example, a heightwise movement of the support with relation to the grippers while the latter remain stationary and hold the margin of the upper, causes the upper to be pulled over the last. It has been found desirable, in organizations of the type above referred to, to insure that the upper not only is properly pulled over the sides of the last but also receives a positive pull in the longitudinal direction of the last toewardly thereof and that the toeward pull be adjustable as to extent and intensity.

In accordance with one feature of the invention, therefore, the illustrated machine is provided, in addition to side grippers, with a toe gripper adapted to seize the margin of the toeend of the shoe upper and to impart to the up- -per a lengthwise pull during and as a result of the relative movement between the work support and the toe gripper, mechanism being provided for adjusting the initial position of the work support from which the support starts its upward upper tensioning movement without, however, varying the final position at which the support terminates its upper tensioning movement. This results in the upper being positively tensioned in the longitudinal direction of the last in addition to being tensioned at the sides of the last, the longitudinally directed tension being variable or adjustable in extent and intensity. Thus, the work support may be adjusted in such a way thatvduring its movement height-wise of the last it has a component of movement toeward or heelward of the last, or it may move heightwise of the last without such components of movement. As a result, the illustrated machine is capable of operating upon a large variety of sizes and styles of shoes, in eect larger than has been possible to operate upon with any other machine of this or similar type heretofore known.

As in prior machines of the above identified type, the machine disclosed herein also is provided with mechanism adapted to clamp the margins of the upper and sole together after the upper tensioning or pulling-over operation and with additional mechanism for thereafter securing these margins together by fastening means such as staples. In accordance with another feature of the invention there is provided mechanism for releasing the toe gripper before the just mentioned clamping mechanism becomes operative and before the margins of the upper and sole are secured together. This release of the toe gripper in timed relation to the operation of the clamping and securing mechanisms just referred to mitigates against the possibility of the upper bridging over or spanning the usually slightly concave top-face of the last forepart. f

Moreover, the illustrated machine is provided, as is common in machines of this type, with a toe gage mounted on the work support. In accordance with a still further feature of the invention there is provided adjusting mechanism common to the toe gage and toe gripper, which mechanism is adapted to effect the simultaneous adjustment of both the toe gripper and toe gage without aiecting the mechanism for operating, that is for closing and opening, the toe gripper.

The mechanism above referred to for securing together the margins of the upper and the sole in the illustrated example comprises two stapling mechanisms. Each stapling mechanism has a stapling head and an anvil movable with relation to the head. In accordance with a further feature of the invention the stapling head is yieldingly moved to a predetermined position against a relatively fixed stop while the anvil is positively moved in a direction opposed to the movement of the stapling head to a predetermined position so as to clamp the margin of the upper and sole between the anvil and the stapling head. Thus, the stapling head, in view of its yieidable mounting, is adapted to accommodate varying thicknesses of the margins of the upper and sole to be operated upon. .The stapling mechanism itself is adapted to form staples from a strand of wire fed into that mechanism and in accordance with still another feature of the invention there is provided a single actuating member adapted to move the anvil to clamp the margins of the sole and upper against the stapling head and simultaneously to operate the wire feeding mechanism, thereafter to cause the fed-in extent of wire to be severed and a staple to be formed. therefrom and then too'peratel a driver causing the latter to insert the staple through the margins of the upper and the sole and clinch it against the sole engaging face of the anvil.

These and other features ofthe invention will now be described with reference to the accompanying drawings and will pointed out in the appended claims.

In the drawings, l

Fig. 1 is a view in right-hand side elevation of a stitchdown shoe pullinvover and tacking machine embodying features of the present invention, the machine being shown partly in section and with certain parts removed Fig. 2 is a view in right-hand side elevation and on an enlarged scale of the work support and we gripper .ofthe mathilde illustrated in Fig. 1;

Fig. 3 is a section along the line lvII-YY-.VIII of Fig. 2;

Fig. 4 is a view in front elevation .of mechanism for suppOrtng and'operating side units carrying the side grippers and the stapling mechanisms;

Fig. 5 is a section along the line VV of Fig. 2;

Fig. 6 is a plan view of the work support with the work on it, as well as of Vthe toe gripper and the side units;Y

Fig. '7 is a plan viewA of` echanism for adjusting the angular positions ofthe side units;

Fig. 8v is a view in front elevation of the mechanism shown in Fig. 7; u

Fig. 9 is a sectional view of the rear portion of the work support;V

Fig, 10 is a plan View of the rear portion of the toe gripper mechanism Fig. 11 is a sectional view, in front elevation, of the driving mechanism;

Fig. 12 is a detail View of part of mechanism for operating the side grippers and the stapling mechanisms; n Y Fig. 13 is a view in front elevation of one of the side units; and

Fie- 14 is a sectional View, in front elevation, of the upper portion of the side unit illustrated in Fig. 13. Y

As stated, the illustrated machine is adapted to pull over and secure'by staples the upper of a stitchdown shoe, particularly a s titchdown shoe having a mid-sole to whichA the margin of the upper is lasted after the'` pulling-,overl operation and to which an'outsole is secured thereafter, usually by stitches.

The shoe illustrated in Figs. 2, 61 9 and 14 has an upper A and a mid-soleQB bothv of which are mounted on a last C. 'I he last C with the sole B and the upper A assembled thereon is supported in the machine on a work Support l0 (Figs. 1 and 2) which, as will be described in detail, is at least in part carried by a bracket I2 securedv to the machine frame I4.. The machine is provided with side units I6 (Figs. 1 6 and 13) there being two such units arranged at opposite sides of the forepart of the shoe whenresting on the work support I 0. Each side u nit I6 comprises a side gripper I8 (Fig. 13) and a stapling mechanism 2Q. Moreover, there is providedy a toe gripperZZ (Figs. 1, 2 and 6). The arrangement is such that after the work comprising the last C with the sole B and the upper A thereon has been placed on the Work Summit I0, the' marginal pdrtiod. 0f the upper at the forepart of the shoe is seized by the side grippers I8 and the toe gripper 22 whereupon the work support I0 is elevated while the grippers remain stationary,- thus tensioning the upper over the last. Thereafter the marginal portion of the upper at opposite sides of the forepart of the shoe is caused to be clamped against the projecting margin of the sole by the side units which to this end have been moved into engagement with the opposite sides of the forepart of the shoe, thereby also rmly working the upper against the sides of the last and into the crease between the sides of the last and the margin of the sole. Finally the side units are caused to secure the margin of the upper to the projecting margin of the s ole by staples inserted Iby the stapling mechanisms 20 which are associated with the side units.

ToY operate the various instrumentalities mentioned in the above brief introduction, the madhine has a drive shaft 24 (Figs. ,1 and 1l) which is mounted in suitable bearings in the machine frame llil and is driven from a conventional source of power. Secured on the drive shaft 24 is a worm 26l which is in meshing engagement with and drives a worm gear 28 mounted to rotate freely on a clutch shaft 3U rotatably mounted in the machine frame I4. The worm gear 28 is the driving member Qi a one-revolution clutch 0f the .CQrrl/entiondl type. the. driven. member $2 beine .fast on, the Shit'll. The, Shaft 30 is provided 011 its left-hand, Sfide. as viewed. in Fig. 11, With a brake mechanism QI the. onventional type which assists the one-revelation clutch in stopping the Shaft 3.0 in a predetermined position after each revolution caused by .dn engagement 0f the. clutch 28, .32.. There. is. `secured on the Shaft 30 a gear 34 which. meshes with. a gear 35 secured on a cam shaft 33 also mounted to rotate in bearings provided. in the machine frame I4. The ratio of transmission between the gears 34 and 36 is 2 to 1 that is to say, it takes two revolutions of the gear 34 to cause one revolution of the gear 36-Y Thus, during one revolutidn 0f the clutch shaft 30 only one-half' revolution is imparted to the cam shaft 38 and in order to complete t'he ljQtation of the cam shaft 38 it is necessary to retreadle theA machine and reengage the clutch 28, 32 to impart to the clutch shaft 3E) a second revolution. Accordingly, the machine cycle is divided into two portions which are separated by a pause.

The clutch-tripping mechanism also is of the conventional type and comprises briefly a clutchtripping plunger 40 (Fi-g. 11) which is actuated lby the vertical arm (not shown) of a Abell crank lever pivoted to the machine frame and having a horizontal arm 42 (Fig. 1) to which is pivotally secured a downwardly extending link 44. The lower end of the link 44 is pivotally connected, Iby means of a swivel block sliding on the link 44 and resting on stop collars, to an arm d6 secured on a rod or shaft 48 rotatablyv mounted in the machine frame I4. Fast on the shaft I8 is a downwardly extending arm which is connected by a horizontal spring 52 to a fixed point on the machine frame. The spring 52, therefore, tends to swing the bell crank member comprising the arm 42 in a counterclockwise direction, as viewed in Fig. 1, to render the clutch inoperative. Secured to the shaft 48 is a horizontal arm 54 similar to the arm 46. The arm 54 is pivotally connected by means of a treadle rod 55 to a treadle 58 pivotally secured inthe lower portion of the machine frame I4. 'Ijhe treadle 58 thus serves to trip the clutch and to initiate the power operation of the machine. The tripping of the clutch is eiected yieldingly in that a spring lill is interposed between the above-mentioned swivel block, connecting the link 44 to the arm 4b, and stop collars secured on the upper portion of the link 44. Depression of the portion of the treadle 58 extending outwardly from the machine frame thus results in a clockwise movement of the arms 54 and 4E against the tension of the spring 52 and in a yielding elevation of the link 44 and a clockwise motion of the arm 42 to trip the clutch 28, 32 which, in a manner well-known in the art, automatically becomes disengaged after the completion of one revolution. Obviously, on engagement of the clutch 28, 32 the clutch shaft 3u is driven and, as stated, each revolution of the clutch shaft 30 results in a one-half revolution of the cam shaft 38.

The cam shaft 38 actuates the various operating instrumentalities of the machine in proper time sequence by means of two cams mounted on that shaft. There is a cam disk B2 (Fig. 11) secured on the shaft 38, which cam actuates the toe gripper 22, the side grippers I3 and the work support lll by means of different cam grooves provided therein as will be described. The other cam disk on the cam shaft 38 is the gear 36 which is provided in its opposite side faces with cam grooves as will be described, these cam grooves serving to swing the side units it into and out of engagement with the work and to actuate the stapling mechanisms 2l).

To elevate the work support Il) for the purpose oi pulling the upper over the last, the cam disk 62 (Fig. l1) has a cam groove 64 in its left-hand side, this cam groove being engaged by a roller carried on an arm 65 of a bell crank lever rotatably mounted on a shaft 63 secured in the machine frame I4.

The bell crank lever has a forwardly extending arm 'lll (Figs. 1 and ll) which is connected by a long link 'I2 to the work support. Upward movement of the link l2, therefore, results in an elevation of the work support.

To close and open the toe gripper 22 there is provided a cam groove 14 in the right-hand side (Fig. 11) of the cam disk 62. This groove is engaged by a roller carried on an arm |55 of a bell crank lever freely rotatably on the shaft G8 and having a forwardly projecting arm 'I3 (Figs. 1 and 11) to the forward end of which is pivotally secured a trunnion block |30 mounted for sliding movement on a link 82 and normally resting against stop collars on the lower end of the link Y 82. A spring B4 surrounds the link $2 and rests with its lower end against the trunnion block 8D and with its upper end against xed collars on the upper portion of the link 82. Accordingly, on clockwise motion (Fig. 1) of the bell crank lever comprising the arms 'i6 and 18, the link 32 is yieldingly elevated. The upper end of the link 82 is pivotally secured to a bell crank lever 86 rotatably mounted at B8 in the machine frame and this bell crank lever, in turn, is pivotally secured to and operates a forwardly extending link B which, as will be described in detail, serves to close and open the toe gripper 22.

To close and open the side grippers I8 there is provided another cam groove 92 inthe righthand side (Fig. 11) of the cam disk 62. The cam groove 92 is engaged by a roller carried on an upwardly extending arm 94 of a bell crank lever mounted to swing about a fixed shaft 9B and having another arm 98wwhich is pivotally connected by a link |00 (Figs. 1 and 11) to a downwardly extending arm |92 of a yoke-shaped rocking member |04 (Figs. 1 and 12). The rocking member H14 is pinned on a shaft |06, mounted for rotation in the machine frame I4, and has two parallel, rearwardly extending arms |08 which have ball-and-socket connections with upwardly extending rods IIE' adapted to operate the side grippers I8 at opposite sides of the work support.

To swing the side units |6 in and out with relation to the work support I0 and the shoe carried thereon, there is provided a cam groove I2 in the left-hand side (Fig. 1l) of the gear 36. This cam groove I I2 is engaged by a roller carried on an arm ||4 mounted for rotation on the shaft |58l The arm H4 has a lateral projection I'I which is pivotally connected by a link ||8 to an arm |2| (Fig. 1) pinned on a shaft |22 rotatably secured in the xed bracket I2 of the machine frame |4. Secured to the shaft |22 is an upwardly extending arm |24 which carries at its upper end a bushing |26. The rearward end of a rod |28 extends through the bushing and is arranged for rotation in the bushing but is constrained to be moved endwise upon endwise movement of the bushing. The rod |28 has a threaded portion which is in engagement with a tapped bushing on the upper end of an arm |39. Upon initial operation of the arm H4 by the cam groove ||2 the arms |29 and |24 are rotated in a counterclockwise direction (as seen in Fig. 1), thus imparting rotation in the same direction to the arm |39 which, as will be described in detail, causes both side units I6 to be swung into engagement with the work after the elevation of the work support Il).

To actuate the stapling mechanisms 2E! associated with the side units I6 a cam groove |32 is provided in the right-hand side (Fig. 11) of the gear 36 and is engaged by a roller carried on an arm |34 of a bell crank lever mounted to swing on the shaft S5. The other arm |36 of the bell crank lever is pivotally secured to a forwardly extending link |38. The enlarged front end portion i4@ (Fig. 1) of the link |38 has a horizontally extending slot |42 which is provided in its upper right-hand end portion with an upwardly extending small recess normally occupied by a pivot pin |44 carried by an arm |46 of a bell crank lever mounted for free rotation on the previously mentioned shaft l'i. Thus, rearward movement of the link |33 as a result of the cam operation of the bell crank lever |312, |33 results in a counterclockwise swinging movement (Fig. 1) of the arm |45 about the shaft IilB. The bell crank lever having the downwardly extending arm IG has a horizontal, rearwardly extending web-like arm |48 (Fig. 12), this arm being located between the previously mentioned arms |23. The arm ifi@ has ball-and-socket con-- nections with upwardly extending rods |52 which serve to operate the stapling mechanisms 2E associated with both side units as will be described in detail.

The provision of the slot |42 in the front end portion Mil of the link |38 is for the following purpose: Should it be desired, after the pullingover operation and before the stapling operation, to render the stapling mechanisms inoperative, for example, if the operator is dissatised with the quality of the pulling-over operation and wishes to return the machine to its zero position to repeat the pulling-over operation and to avoid the driving of staples, the stapling mechanisms are rendered inoperative by raising the front end portion |40 of the link |38, thereby causing the pivot pin M4 to enter the slot |22 proper with the result that on rearward movement of the lmk |38, the front end portion |28 moves ldly and with relation to the arm |136, the latter thus remaining stationary and not operating the stapling mechanisms.

For the purpose of raising the front end portion M8 of the link |38 that portion is pivotally secured by an upwardly extending rod l52pto a bell crank lever |54 pivotally secured at |o6 t0 the machine frame and connected to a forwardly extending link (not shown) located behind the link i l in Fig. 1. This forwardly extending link is pivotally secured to an arm (not shown) corresponding to and located behind the arm |26 in Fig. 1 and being part of a bell Vcrank lever freely rotatable on the shaft E22. This bell crank lever has a forwardly extending arm |756 to which is secured a handle i538. Accordingly., a depression of the handle i623 results in a swinging movement of the bell crank lever l in a clock-- wise direction as viewed in Fig, l and a raising of the front end portion |28 of the link |38, thus rendering the stapling mechanisms inoperative.

The timing of the operations of the various instrumentalities of the illustrated machine during the two portions of one cycle of operat1ons as a result of the rotation of the cam shaft 36 is substantially as follows: During the rst portion of a complete revolution of the cam shaft 68 corresponding to a complete cycle of operations, the toe gripper 22 and the side grippers i8 are closed upon the marginal portion of the upper about the same time by their respective mechanisms. While the grippers remain stationary and hold the upper, the work support lll is elevated to perform the pulling-over operation and then the toe gripper 22 alone is opened. This completes the first portion of the cycle. During the resulting pause the operator now has an opportunity to inspect the quality of the pullingover operation and, if satised, he initiates the second portion of the cycle by retreadling the machine during which portion the side units are 'swung into engagement with the shoe. The marginal portion of the upper and the projecting margin of the sole are clamped together by the side units whereupon the side grippers are opened. Thereafter the stapling mechanisms are operated to drive staples through the clamped marginal portions of the upper and the sole, thus securing these portions together.

The above-mentioned work support i6 comprises a cradle-like member E62 (Figs. l and 2) which is supported at its front end by a swinging bracket |64 pivotally secured to the xed bracket i2. At its rear end the cradle |62 is pivotally connected to and supported by the upper end of the above-mentioned link 12.

To support the rear portion of the work there is provided a U-shaped heel rest |66 (Figs. l, 2 and 9), the two parallel arms of which are mounted to rotate on a pin |68 xed in a boss E16 on a slide |12. The slide |12 is adjustable along a guideway provided in the upper portion of the cradle |52, the adjustment taking place in the longitudinal direction of the cradle |62.

To adjust the heel rest 666 heightwise of the cradle 662, so as to accommodate lasts of different springs (heel heights) and to insure that the forepart of the sole B is located substantially parallel to the upper portion of the cradle |62, the heel rest |66 has on its left-hand side, as seen in Fig. 9, a downwardly extending arm |14 provided with a socket |16 in which is contained a spring-pressed plunger |18 carrying a hand knob. The inner end of the plunger is adapte-d to en gage one of a series of holes |88 provided in a downwardly extending portion |82 of the slide |12, the holes being arranged along an arc drawn about the center of the pin |68. It will be seen that adjustment of the plunger |18 from one hole to another results in a vertical adjustment of the work-engaging portion of the heel rest |66.

To adjust the heel rest |65 in the longitudinal direction of the cradle |62 so as to accommodate lasts of diii'erent lengths, the slide |12 is adjusted 'along the cradle |62. To this end the cradle 62 is provided with a T-shaped guide portion |84 (Fig. 9) which ts in a T-shaped guideway in the slide |12. The adjustment of the slide |12 in the longitudinal direction of the cradle |82 is eiiected by manual displacement of the slide.

The slide 12 is locked in its adjusted position 4by a spring-pressed plunger |86 carrying a hand knob and contained in a socket member |68 secured to the side of the cradle |62, as best shown in Fig. 2. There are provided in the side of the slide |12 a series of rectilinearly arranged holes |98 into one of which the inner end of the plunger |86 enters so as to lock the slide |12 in its position of adjustment.

To support the forepart o1 the work there is secured to the cradle |62 a block |92 which may be termed a toe rest in that the toe portion of the sole B rests thereon (see Fig. 2).

There is furthermore provided a toe gage |915 (Fig. 2) which is in the form of a block slidable along a guide provided in the upper portion of the cradle |62. The guide corresponds to and may be considered a continuation of the guide |84 (Fig. 9). As will be described in detail, the toe gage |84 is connected to the toe gripper 22 and is adjustable with the latter in the longitudinal direction of the work support so as to accommodate lasts of different lengths. As shown in Fig. 2, the toe end of the last C abuts the toe gage |94.

It has been mentioned that the pulling-over operation is performed by an elevation of the work support I0 with the work on it while the marginal portion of the shoe upper A is held gripped by the toe gripper 22 and side grippers I8 which do not participate in that upward motion of the work support. Moreover, it has been stated that it is the power-operated link 12 which produces the upward motion of the work support. The initial position from which the link 12 starts its upward motion is adjustable whereasI the nal position of the link after having completed its upward motion is always iixed in the machine. Accordingly, the initial position of the work support from which it starts its upward motion is variable and the nal position of the work support after the completion of the pulling-over operation is xed in the machine. This means that the direction of upward motion of the work support is variable or, in other words, that in addition to its upward movement the work support has adjustable components of movement directed toward the toe end or the heel end of the shoe supported thereon. The adjustment of the initial position of the work support and, accordingly, the direction of the component of movement toewardly or heelwardly is selected to suit the specic working conditions. With certain types of shoes a heelward component may be desirable;

with other shoes a toeward component, and with still other types it may be most desirable to have no component of movement in either direction. The mechanism for bringing about this adjustment will now be described. There are mounted on the upper portion of the frame |4 spaced ears |96 (Figs. 1 and 5) which carry alined pivot studs |198. Rotatably mounted on these studs |98 is a yoke-shaped guide member 200 provided at the insides of its arm portions with guideways 202 (Figs. 2 and 5). Blocks 204 are movable along the guideways 202 and are pivotally mounted on the opposite ends of a horizontal pin 206 extending through, and xed to, the link 12. During, and as a result of, the upward movement of lthe link 12 the blocks 204 are moved up in the guideways 202 until the pin 206 is alined with the axis of the studs |98. At this point the upward movement of the link 12 is terminated. The guide member 200 is adjustable about the pivot studs |98 when the link 12 occupies its initial lowermost position so as to vary the initial posi- Y tions from which the link 12, as well as the work support I0, begin their upward motions. To this end the guide member 200 has a downwardly extending portion 208 (Fig. 2) which is pivotally connected by parallel links 2|0 to parallel arms 242 fast on a shaft 2|4 rotatable in the machine frame. The shaft 2|4 also carries an upwardly extending arm 2|6 provided with a springpressed plunger and hand knob 2|8. The plunger is adapted to engage one of a series of holes 220 provided in a block 222 secured to the machine frame I4. As will be readily seen, adjustment of the arm 2|6 along the block 222 results in a tilting of the guide member 200 about the axis of the pivot studs |98 and, accordingly, in a tilting of the guideways 202 along which the blocks 204 are constrained to move during the upward movement of the link 12. Since the pin 206 carrying the blocks 204, ontermination oi the upward movementV of the link 12, is always positioned in alinement with the axis of the pivot studs |98, the adjustment of the guide member 280 does not vary the nal elevated position of the work support.

The toe gripper 22 which is illustrated in Figs. 1, 2, 6 and 1() comprises a bar shaped main body 224 to which is xed the lower jaw 226 of the gripper, whereas the upper jaw 228 is pivotally secured at 230 to the main body 224. The rear end of the main body 224 is fork-shaped, as illustrated in Fig. 10, and is pivotally secured by a pin 232 to the forked upper end of a swinging bracket 234 pivoted midway between its ends on alined, spaced studs 236 (Figs. 2 and 3) held in ears 238 (Figs. 1 and 3) provided on the upper portion of the machine frame |4. Moreover, there are provided a cover plate 240, which is secured to the top of the main body 224, and parallel side plates 242, the nearest one of which in Fig. 2 is shown broken off. As illustrated in Fig. 10 the inner faces of the rear ends of the side plates 242 are provided with grooves 244 in which are adapted to run supporting rolls 246, rotatable on the pin 232, on forward or rearward movement of the side plates 242 with relation to the main body 224 of the toe gripper. At their forward portions the side plates 242 are held together by a connecting pin 248 (Fig. 2) carrying a roller 250 which on forward or rearward movement of the side plates 242 rolls along the tcp face of the main body 224. There is another connecting pin 252 carrying a roller 254 which bears against the inclined tail portion 256 of the upper jaw 228. Thus, on rearward movement of the side plates 242 with relation to the main body 224 of the toe gripper, the upper jaw 228 is moved toward the lower jaw .to grip the marginal portion of the upper. The gripper is opened upon forward movement of the side plates. For thus moving the side plates 242 the already described power-operated link is connected by a pin 258 (Fig. 3) to` an arm 260. In the inoperative position of the machine parts as illustrated in Fig. 2 the pin 258 is positioned'in alinement with the studs 236 (see particularly Fig. 3). The lower end of the arm 260 has pinned to it a stud 282, the opposite end portions of which are rotatably mountedin the lower end of the bracket 234. The upper end of the arm 260 .is fork-shaped and carries rolls 264 which engage and are adapted to run in curved slots 206 cut into the enlarged rear ends of the side plates 242. The slots 266 are curved about the axis of the pin 232 as a center for a purpose to be presently described. The toe gage |94 has pivoted to it aV yoke 268 through which is slidable a rod 210 carrying a spring 212. The lower end of the rod 210 carries a collar which prevents the rod from slipping out of the yoke 288. The upper end of the rod is pivotally mounted on the pin 232 inside of the upper end of the swinging bracket 234 (see Fig. 10). The just-mentioned spring 212 is confined between the yoke 288 andan enlargement on the upper end of the rod 210 (see Fig. 10). Thus there is a yielding connection between the toe gage |94 and the toe gripperV 22 through which connection, upon adjustment of the toe gage to be described, the toe gripper will simultaneously be adjusted. The adjustment ofV the toe gripper 22 takes place without affecting the gripper closing mechanism. Thus if, for example, the toe gage |94 is adjusted toward the right of Fig. 2, the result is that the swinging bracket 234 is adjusted about the axis of the studs 236. Since the pin 258 connecting the power-operated link 90 with the gripper-operating arm 260 is located in alinement with the axis of the studs 236, the gripper-closing mechanism remains unaiected by this adjustment and any movement of the arm 260 caused by the swinging movement of the bracket 234 on adjustment produces merely an idle motion of the rolls 264 along the curved slots 266 in the rear portionsof the side plates 2 2.

Toadjust the toe gage |84 and the toe gripper 22 simultaneously, the toe gage is bolted to a rack bar 214 which is slidably 'mounted in the upper portion ofthe cradle |62 to move in the longitudinal direction thereof. With the rear portion of the rack bar 214 meshes a pinion 216 (Fig. 9) mounted on a stud 218 rotatably secured in the cradle |672 and extending outwardly from the cradle toward the right of Fig. 9. A locking sleeve 280, which is mounted for axial movement on and with relation to the outwardly extending portion of the stud. 218 and which is splined on the stud 218 so that on rotation of the sleeve 280 the stud 218 is constrained to rotate therewith, carries a hand knob 282 on its outer `end and a locking pinion 284 on its inner end. The locking pinion 284, in the normal inoperative position of the parts, meshes with a iixed rack bar 286 secured to the cradle |62. A spring 288 housed in the sleeve 280 and engaging with one end an internal shoulder of the sleeve 288 and with its other end lock nuts on a reducedportion of the stud 218 normally forces the sleeve 280 toward the left of Fig. 9 sothat the locking pinion 1l 284 and the fixed rackt bar 286 are in meshing engagement and preventrotation of the'hand wheel 282. Adjustment of the toe gage and the toe gripper by a longitudinal displacement of the rack bar 2'I4 is eiiected by pulling out the sleeve 280 toward the right of Fig. 9 and against the pressure of the spring 288 to move the locking pinion 284 out of engagement with the Xed rack bar 286 and then rotating the stud 218 by a rotation of the hand knob 282 and sleeve 280.

It will be understood that upon rotation of the cam shaft 38 the bell crank lever 86 is yieldingly rotated in a clockwise direction as viewed in Fig. 2 and that the link 90 is moved to the right of Fig. 2, swinging the arm 260 in a clockwise direction about the stud 262 which connects it to the swinging bracket 2 34. The swinging bracket, onV

closing of the toe gripper 22, of course, is stationary, it being normally stationary in the machine, and the only time it is moved is when the toe gage |94 is adjusted as described.

It has been stated that the side units I6 comprise each a Aside'gripper I8 and a stapling mechanism 20. The side units I 6 vare illustrated in Figs. 1, 4, 6, 13 and 14. It also has been mentioned that on inward movement of the side units toward the shoe after the pulling-over operation the side units act as clamps by which the marginal portions of the shoe upper A and the sole B are clamped together. The location of the side units I6 with relation to a shoe on the Work support I is illustrated best in the plan View of Fig. 6. In this View the units are shown as having engaged the work, `that is to say, after they have been moved from their inoperative positions to their operative'positiona It will be noted that the side units I6 at opposite sides of the shoe are located at different angles with relation to the longitudinal median line of the Work support. The angular positions of the side units depend upon the so-called "swing? of the last, that is to say, the angle formed between the longitudinal median lines of theA rear portion of the sole and the forepart ofthe sole, Vwhich angle varies with diierent stylesof shoes. It is desired that the side units I6 be located substantially perpendicular to the line of tangency to the curved portion of the soleedge with which they are to come into engagement. As will be described, the angular positions of the side units are adjustable and also are reversible without adjustment so as to utilize the machine for the operation upon left and right shoes by the same mechanism. Since both units are similar in construction, only one will be ldescribed in detail. Each unit has a casing 290r (Fig. 13) provided at its inner end with alined lugs 292 which are pivotally secured by means of ful'crum studs 294 (Figs. 1 and 4) to a U-shaped carrier bracket 296. Of course, there is one carrier bracket 296 for each unit I6. Each bracket`296. is pivotally connected at the upper and lower ends of its forward portion by studs`298 to lugs on the iixed bracket I2 of the machine frame I4. Considering the left-hand bracket 296 (as viewed from the front of the machine), theiupper end of its forward portion has integral therewith an arm 300 (Fig. 4) which -extendslaterally and to the right of the machine. The arm 300 is connected by a pivot pin 302 and a swivel block 304 (Fig. 1) to a link 306 extending forwardly of the machine and connected by a .pivot pin 308 (Fig. 4) to an arm 3I0. The arm 3I0 has a hub 3I2 which is mounted for vfree rotation on a shaft 3I4rotatably mounted inthe bracket I2 of themachine frame. The hub 3I2 is "surrounded by a torsion spring 3I6, one end'of which lies vagainst a lateral 'projection'of' the arin 3I0 and the other end of which is held in'` an adjustment disk 3I8 which bearsagainst the hub of the previously mentioned arm |30 and is connectable therewith. Rotation of the disk 3I6 with relation to the hub of the arm |30 effects an adjustment of the tension of the torsion spring 3I6. The hub of the' arm |30 is keyed to the shaft 3I4. Accordingly, on operation of the arm I30 as previously described, the arm 3I0 Yis yieldinglyl operated through the torsion spring 3| 6 tol rotate Vthe left-hand bracket 296 about the studs 298 and to move its side unit I6 as will be described more in detail.

'The right-hand carrier bracket 296 (as viewed from the rontof the machine) has integral with it at the lower end of' its forward portion an arm'320 (Fig. v4)v which extends laterally and to the left ofthe machine. A link 322 connects the arm 320 to an arm 324 which corresponds to the yjust-described arm 3I0. The arm 324 also has a hub 3.26V mounted for free rotation on the shaft 3I4 and carrying a torsion spring 328, one end of which lies against a lateral projection of the arm 324 and the other end of the spring being held in an adjustment disk 330 corresponding to the disk 3I8 and being connectable with another disk 33I fixed on the left-hand end (Fig. 4) of the shaft 3I4. Again rotation of the disk 330 with relation to the disk 33| serves the purpose of adjustingv the tension of the torsion spring 328. Both the arms 3I0 and 372,4 have forwardly extending abutments 332 and 334 which cooperate With stop arms 336 and 338 fast on the shaft4 3I4.

Thus, on power operation of the arm I30 (that is, counterclockwise rotation as viewed in Fig. 1) the shaft 3I`4'is positively rotated but the arms 3I0, 324, through the'agency of which the side units I6 are moved into engagement with the' Work by means of the arms '300, 320 which with their respective brackets 296 form quasi bellcrank levers, are yieldingly operated by the torsion springs 3I6, 3,28 so that they not only yieldingly engage the work but after engagement remain stationary while the shaft 3I4 may continue its rotation, it being understood that the stroke of the arm I3 0 is constant.

The side units I6 are adjustable prior to their power operation with relation to thework support or still better. with. .relation to the shoe mounted on the Work 'support to. either shorten or lengthen their operative movements into engagement with 'ti'i'elvvorlliy as conditions may requireit. As already stated, the angular positions of the side units I6 also are'. adjustable or. reversqv ible to accommodate shoes of different swings and to accommodate left andright shoes. The adjustment of the side units 'I6 toward and vfrom the shoe on the work support I0 is accomplished by utilizing the actuating mechanism just described, thaty isby manually rotating the shaft 3| 4. It will be recalled thatv the armi 30 has a tapped bushing in Vwhich is rotatable the threaded portion of the rod |28 (Figi 1). The .forward end of the rod I 28 has a swivel connection with a link vidllextending into a sleeve 342. The link 340 has a lateral pin 344Which engages a slot provided in the sleeve 342. 'Ih-us .the .link 340 can move axially with relation to the sleeve but is constrained to rotate with thev sleeve upon rotation ofthelatter.v The sleeve342 has aswivel connection'at its forward,fexidto a short shaft 346 rotatable .in a: 'fixed'bearinfguzand carrying a hand wheel 350. During the power operation of the arm |36 the link 340, of course, is moved axially and this movement takes place with relation to the sleeve 342 which is then stationary, the pin 344 moving along the slot in the sleeve 342. The adjustment of the side units I6 toward and from the work on the work support takes place when the power-operated mechanism is inoperative, in which case the arm |24 carrying the rear end of the rod 128 is stationary so that on rotation of the sleeve 342 by the hand wheel 336i the arm i3@ is rotated in one direction or the other, thereby rotating the shaft 3|4 and through the agency of the arms 3I0 and 324 adjusting the side units I6 as desired. It should be added that during this adjustment the carrier brackets 296 are rotated about their fulcrum studs 236, thus carrying the side units I6 bodily inwardly orfoutwardly of the supported shoe.

The mechanism for effecting the angular adjustment of the side units I6 will now be described. This adjustment of the side units takes place about the fulcrum studs 294 as centers. Each unit i6 is angularly adjusted by a rod 352 (Figs. 6, 7 and 13), each rod having a ball-andsocket connection 354 with its respective side unit i6. Considering first the right-hand unit i3 (Fig. 6), the front end of its rod 352 has a pivotal connection with an arm 356 (Fig. 7). The arm 356 is part of a two-armed lever having spaced hubs 353 (Fig. 8) and having another arm 366 extending from the lower hub 358 toward the left of Fig. 8. This two-armed lever is mounted for free rotation on a shaft 362 which is in bearings in a bracket 364 secured to the fixed bracket l2. The previously mentioned bearing 348 is formed on the bracket 364. The arm 356 carries a spring-pressed plunger 368 having a hand knob 3l@ and adapted to engage holes 312 (Fig. '7) provided in a plate 314 secured to a portion of the bracket 364.

Considering now the left-hand unit I6 (Fig. 6), the iront end of its rod 352 is pivotally connected to an arm 316 (Figs. '1 and 8) which is freely rotatable on the shaft 362. The arm 316 carries a spring-pressed plunger 318 having a hand knob 366 and adapted to engage holes 382 (Fig. '1) provided in a plate 384 secured to the arm 360 which is a part of the above-described two-armed lever.

In adjusting the side units I6 angularly to accommodate shoes of different styles and swings, it will be necessary to adjust the right-hand unit i6 (Fig. 6) iirst by lifting the spring-pressed plunger 36B by means of the hand knob 310 and moving the arm 356 with relation to the plate 3M containing the adjustment holes 312, since that adjustment also results in a corresponding adjustment of the arm 316 connected to the lefthand unit i6, the arm 316 being connected by the spring-pressed plunger 313 to the arm 360 which is integral with the arm 356. Accordingly, after the right-hand unit I6 has been adjusted to its proper angular position, it will be necessary to lift the plunger 318 by means of the hand knob 336 and move the arm 316 with relation to the now stationary arm 366 so as to adjust the left-hand unit I6.

The same adjusting mechanism may be utilized when adjusting the side units i6 from operation on right shoes to left shoes or vice versa, which adjustment, provided the left and right shoes are of the same style, will require merely a reversalY of tl e angular positions of the side units. To this end, the bracket 364 has a forwardly extending portion 390 (Figs. 7 and 8) which is cup- 14 shaped and contains a hollow hand knob 392 of substantially cylindrical shape. The hand knob 332 carries a substantially oval-shaped stop 333 which may be adjusted by the hand knob to various angular positions, these positions being determined by a pin (not known) on the lower portion of the knob, the pin engaging four positioning holes 396 (Fig. 7) in the bottom of the cup. The hand knob 392 is normally held down by a spring (not shown) which is located insidev the knob 332 on a screw bolt 393. The bolt 336 extends through a central hole in the bottom of the cup upwardly into the knob 332 and is held in place by a nut 400 (Fig. 8). The justmentioned spring is confined between an inner shoulder of the knob 332 and the head of 'the bolt 336 and thus tends to hold the knob 332 down. The knob is raised manually against the pressure of its spring to remove the positioning pin out of one of the holes 396 whereupon the knob 332 may be rotated to change the position of the stop 394. The stop 396 is adapted to be engaged on its right-hand side (Figs. 'l and 8) by an abutment screw 662 carried in a forward extension 64 of the arm 356. The lefthand side of the stop 394 is adapted to be engaged by an abutment screw 466 carried in a forward extension 6.63 of the arm 336. Thus, the movements of the arms 356 and 316 forwardly of the machine are limited by the stop 336. Since, as Fig. 6 illustrates, one of the side units i6 assumes an angular position with relation to the longitudinal median line of the work support different from the angular position of the other unit, the arrangement is such that in the proper position of both side units I6, one oi the abutment screws 362, 606 is engaging the abutment 364, whereas the other screw is located a predetermined distance from the stop 333 (see '1). The adjustment illustrated in Fig. 'l is for a left-hand shoe. The angularity of the lefthand -side unit i6 is more pronounced than that of the right-hand unit I6 due to the more pronounced curvature of the left-hand edge of the sole forepart. The abutment screw (i652 rests against the stop 394 whereas the screw 636 is located a certain distance therefrom. When it is now desired to operate upon a right-hand shoe corresponding to the illustrated left-hand shoe it is merely necessary to raise the spring-pressed plunger 363 by its hand knob 313 out of its hole 312 and shift the arm 356 until the screw 33 abuts the stop 33d, in which case the angular positions of the side units i6 are reversed in the sense that the right-hand side unit now assumes the more pronounced angular position and the left-hand unit the less pronounced angular position. The plunger 368, in the new position, reengages another adjustment hole 312. The adjustment of the stop 334 illustrated in Fig. 7 may be maintained as long as the shoes to be operated upon are of similar style or swing. Should there be a substantial change of style or swing it would be necessary to change the angular position of the stop 364. It will be understood that for the operation upon shoes of eX- treme styles and swings the oval-shaped stop 394 will be positioned with its smallest diameter in line with the abutment screws 402, d66. This permits a substantial movement of the screws toward and from the stop 334, a substantial movement being necessary in view of the change from one extreme angular position of the side unit to its reverse position. On the other hand,

yil? the run of shoes to be operated upon is of less extreme style and swing, particularly if the angular disposition of the longitudinal median lines of the rear part and forepart of the shoe sole is less pronounced, it will be necessary t adjust the stop 365i so that particularly in the other extreme case of the least extreme style, the longest diameter of the stop is in alinement with the abutment screws 462, 466. Thus, it will be seen that for reversing the mechanism from operation on left slices to rightv shoes or vice versa it is only necessary, provided the stop 664 is properly adjusted, to shift the arm 356 with relation to the plate 814 containing the adjustment holes 612. This moves the abutment screw which at that time is in contact with the stop 384 away from the stop a distance corresponding to the spacing of the other screw from the stop and corresponding to the length of movement of that other screw into engagement with the stop.

Each side gripper i8 has two jaws 416 and 4 i (Figs. 13 and 14) plvotally secured in a bracket 414 by a pivot stud 456. The bracket 414 is secured to the inside of the casing 298 of the side unit i6. The upper jaw 456 has a tail 418 which carries a screw 426 engaging a plunger 422 movably mounted in a bore provided in the bracket 414 and supported by a 'heavy spring 424 seated in the bore. Moreover, the jaw 416 has a downwardly extending abutment 426 which, under the action of the spring 424, is forced against a stop 42S secured to the bracket 414. This permits the jaw 416 to yield slightly during the pulling-over operation.v The lower jaw 4I2 is freely rotatable about the stud 416 and is pivotally connected by a link 436 to a swinging segment 4t2 pivoted at 434 to the bracket 414. rlhe segment 482 in turn is pivotally connected by a link 436 to an arm 488 clamped on a shaft 446, the shaft being rotatably mounted in a bear.- ing provided in the lower portion of the casing 2st. The left-hand end (Fig. 13) 0f the arm 438 is connected by a ball and socket joint to the previously described rod H8 which is poweroperated to close and open the side gripper. More specifically, on elevation of the rod lill the lower gripper jaw 412 is swung upwardly about the. stud dit', thereby gripping the marginal portion of the upper against the aw 416.

The already mentioned stapling'mechanism 26 simultaneously acts as a clamp to seize and'hold together the marginal portions of the shoe upper A and the sole B in readiness for the stapling mechanism to secure these marginal portions together bya staple.' This clampingactiontakes place between a movable stapling head 4.42 (Figs. 13 and 14) and a movable anvil 444, the arrangement being such that-the anvil engages the lower face of the projecting marginal portion of the sole whereas the staplinghead 442 descends'in a direction inclined'toward the plane of'the shoe bottom, upon themarginal portion of the upper. The stapling head 442 constitutes a casing for the stapling mechanism proper, the'head'being slidablymounted'in a guideway '446 provided in the upper portion of the casing 29u of the lside unit i6. The stapling head 442 is'normally depressed by-a spring 448 against a fixed stop onthe casing 29s. The spring 448 isseated in a bore provided in the casing'296 and acts on a plunger45 also mounted in that bore, the lower end of the plunger acting against a bracket '452 which is bolted to one side of the head 442. 'Thefstapling head 442 contains a wireffeeding mechanismz45`4 (Fig. 13) of a type 4shown and described in the application for United States Letters Patent Serial No. 689,175 filed August 8, 1946, in the name of Herman A. Imhof. rrEhe staple inserted by the stapling mechanism is formed in the stapling mechanism from this wire. The wire is drawn off from a reel 456 (Fig. l) and conducted over guide rolls, such as the guide roll 458 shown in Fig. 1, to the wire feeding mechanism. It is understood that since there are two stapling mechanisms at opposite sides of the work support, two wire reels 456 are mounted on the machine -frame in side-by-side relation. The vwirefeeding mechanism serves to advance the wire into a stapleforming mechanism which is of the conventional type and primarily comprises an outside former 460 (Fig. 14) and an inside former 462. The wire is fed -between the formers and then the leading portion of the wire, on movement of the outside 'former 460, is severed and bent over the inside former 462 into the shape of a staple. The formed staple is driven by a driver 466 through a throatpiece 464 into the work parts. The driver 466 is removably clamped toa driver bar 4M! guided for reciprocating move- Vment in the head 442, The outside former 466, as is customary in staple-forming mechanisms of .this type, is slidable in a passage or guideway provided in the stapling head 442. The inside former .462 is the form of a long bar pivoted atl 4.1.!) to the head 442 and engaged Aby a flat spring .4,12 secured to the head 442. The spring 412 forces the inside former into its operative position in which it cooperates with the outside former in the formation of a staple. To permit the ldriving of the staple it is necessary to move the inside former 462 out of the path of movement of the staple and the driver and this end is `accomplished by the driver bar 468 which, at a predetermined moment in its downward travel, Aengages a shoulder on the inside former 462 and cams the inside former out of the path of movement of the driver. VOn retraction of the driver the spring 412 automatically returns the inside-former to its operative position.

As kpreviously stated, the rodr |50 serves to opcrate thestapling mechanism. As illustrated in Fig. 13,.the upper end of the rod |50 is pivotally connected by a ball-and-socketv joint to a twoarmed lever 414 which is mounted to rotate freely on the lshaft 44E). This lever 414, by Va single swinging `motion in a clockwise direction as viewed-in Fig. 13, actuates the various instrumentalities of the entire stapling mechanism in timed sequence. More specifically, the lever 414 elevates the anvil 444 into'engagement vwith the lowerface of the sole margin, actuates the wirefeeding mechanism 454, actuates the outside former 460 to cut the wire and form the staple, and'inally actuates the driver 466to insert the staple, 'v

The right-hand end ('Fig. `13) of the lever 414 is vpivotally connected-by a link 416 to a bell crank-lever 418 which is secured cna shaft 48D rotatably mounted in bearings in the casing 2,90 of Vthe side unit I6. The bell crank lever 418 has an upwardly extending arm which is pivotally connected by a curved link 482 to an arm 484 which carries the anvil 444 and which is mounted cswingabouta stud 486 secured in the bracket Therefore, on actuation of the lever 414, as referred to above, the-bell crank lever 418 is swungin a counterclockw'isedirection as viewed in -Fig 13, thereby rotatingltheshavft' 4 80 and elevating the anvil 444. Since the upwardly eX- 17 tending arm of the bell crank lever 418 and the link 482 in fact constitute a toggle which is straightened when the anvil 444 is moved up into its sole engaging position, the toggle acts as a lock holding the anvil in its elevated operative position.

Moreover, there is secured to the shaft 480 a cam arm 490 having an enlarged free end portion which is provided at its opposite sides with cam tracks. On the outer face, as Viewed in Fig. 13, there is a cam track 492 which, on rotation of the cam arm 490 in a counterclockwise direction, as viewed in Fig. 13, serves to actuate the wire-feeding mechanism 454. A roll running in this cam track is carried by an arm 494 of a bell crank lever which is mounted to rotate on a shaft 496 secured in the casing 290, The other arm 498 of the bell crank lever is connected by a link 500 to a small arm 502 of the ratchet drive for the wire feeding mechanism described in detail in the aforementioned Imhof patient application.

On the inner face of the enlarged end of the cam arm 490 there is provided a cam track 504 in which runs a cam roll carried by an arm 506 (Fig. 14) of a bell crank lever also mounted to swing on the shaft 496. The arm 506 is similar to and located behind the arm 494. The arm 506 is integral With an upwardly extending arm 508 which is pivotally connected by a link 510 to a bell crank lever 512 rotatably mounted on a stud 514 secured in the casing 290 and provided at the front end of its forwardly extending arm with teeth that engage a rack provided on the outside former 460. Rotation of the bell crank lever 512 in a counterclockwise direction, as viewed in Fig. 14, which is caused by the abovementioned rotation of the cam arm 490, results in a downward movement of the outside former 468 with the results described.

For the purpose of actuating the driver 466 there is secured on the shaft 480 a small arm 516 (Fig. 13) which is pivotally connected by a link 518 to an arm 520 mounted to swing on a pivot stud 522 secured in the casing 290. The free end of the arm 528 is pivotally connected to a collar 524 which is mounted to slide on a rod 526 pivotally suspended from an arm 528 pivotally secured at 530 to the casing 290 and adapted to operate the driver 466. The free end 532 of the arm 528 is rounded and engages between projections 534 (Fig. 14) on the driver `bar 468. The collar 524 is supported on a spring 536 mounted on the rod 526, the lower end of the spring resting against a washer 538 held on the lower end of the rod 526 by lock nuts 540. As will be readily seen, on rotation of the shaft 480 in a counterclockwise direction, as viewed in Fig. 13, the link 518 is lowered rotating the arm 520 in a counterclockwise direction (Fig. 13) and loading the spring 536 since the rod 526 is prevented from downward movement in View of the locking of the arm 528 from which it is suspended. The locking mechanism for holding the arm 528 immovable at that time comprises a locking block 542 secured on the arm 528 and engaged by the hook-shaped end of a two-armed pawl 544 pivotally secured at 546 to the casing 290. The right-hand end of the pawl 544 is pivotally connected to a downwardly extending rod 548 which passes through a sleeve 550 pivotally supported by the link 518. The lower portion of the rod 548 has secured thereto a collar 552 and moreover a spring 554, mounted on the rod 548, is interposed f orepart.

18 between a xed collar on the upper end of the rod 548 and the sleeve 5511. As shown in Fig. 13, the collar 552 is initially spaced from the sleeve 550 a certain distance which has to be traversed by the sleeve 5,50 on downward movement of the link 5 I 8 before the rod 548 is pulled down to move the pawl 544 out of latching engagement with the block 542, thereby releasing the arm 528 to the force of the loaded spring 536 to actuate the driver. After the driving of the staple and the return of the arm 528 into initial position the pawl 544 is yieldingly moved into locking position by the spring 554.

Before initiating .a cycle of operations the operator, if necessary, makes the various adjustments described in detail above, such as the adjustment of the initial position of the link 12 which elevates the work support 10, the adjustment both heightwise and lengthwise of the shoe of the heelrest 166, the adjustment of the toe gage 194 and concommitant adjustment of the toe gripper 22, and the widthwise as well as angular adjustments of the side units 16 in accommodation of the length, width, style and swing of the shoe to be operated upon. Having done this he initiates the rst portion of one cycle of operations by the depression of the treadle 58, thereby imparting, as described, to the cam shaft 38 one-half of a revolution. During this one-half of a revolution of the cam shaft 38 the link 911 is yieldingly moved to the 'right of Fig. 2 by its respective cam-operated Aactuating mechanism and the rods 11D at opposite sides of the work support are elevated, thereby closing the toe gripper 22 and both side grippers 18. It is understood, of course, that before the grippers are closed the operator has inserted the free marginal portion of the shoe upper A between the gripper jaws. The grippers having been closed, the link 12 is elevated by its respective cam-operated actuating mechanismjthereby elevating the work support 10 to perform the pulling-over operation as described, tbeing understood that this movement of the work support 10 takes place with relation to the grippers 18 and 22 which remain stationary while holding the margin of the upper gripped. Depending upon the initial adjustment of the link12 the elevation of the work support takes place with a heelward or toeward component of movement or without any such components of movement which primarily affects the operation of the toe gripper as will be readily understood. It has been found desirable to impart to the upper during the elevation of the work support a tensioning stress in the longitudinal direction of the last and toewardly thereof to insure a complete tensioning of the shoe upper over the entire forepart 0f the last. However, before securing together the` marginal portion of the tensioned upper and the projecting marginal portion of the sole at the opposite sidesof the forepart by the staples driven by the side units .16 it is desirable to release the toe gripper to prevent the top of the vamp portion of the upper from bridging the frequently somewhat concave top of the last It is for this relason that the toe gripper, before the first portion of the cycle of operations is terminated, is opened again to release the upper which, at the termination of the rst portion ofthe cycle, is then held only by the side grippers. The machine comes automatically to a stop at the end of the first portion of the machine cycle to enable the operator to inspect the result of the pulling-over operation. If the operator is satisfied with the pulling-over operation he then initiates the second portion of the 19 cycle by retreadling themachine. During'y the second"porti'on of the cycle the cam shaft 38 is rotated through the second Vhalf of one complete revolution and as a result of this rotation the side units IG are swung in. The margins' of theA upper and sole are engaged between the upwardly moving anvil 444 and the stapling head 442, `and in View of the yieldable mounting'of the staple head 442the head can adjust itself automatically to variable thicknesses of the combined margin of the upper and the sole. The margin of the sole and the upper havingbeen clamped, vthe side grippers are opened to release the upper, and in the meantime, as a result of the rotation of the lever 414, the wire-feeding mechanism 454 has been operated to advance the wire into the stapleforming'mechanism, the outside former 460 then being lowered to sever the wire and form the staple. Finally on engagement of the sleeve 550 with the collar 552, after having traversed the lost motion provided between it and the collar and after the driver-actuating spring 536 Yhas been loaded as described, the arm 528 is released to the force of the'loaded spring'536 with the result that the formed staple is driven out of the throat 464 through the combined margins of the upper and the sole, the ends of the staple legs being clinched against the anvil 444 supporting the work from beneath. Toward the end of the second portion of the cycle the Various described instrumentalities are then returned by their respective cam-operated mechanisms into their initial positions in readiness for the operation upon the next shoe.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1V. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for effecting relative movement `of the support and the grippers heightwise of the last to pull the upper over the last, means movable in a direction inclined toward the plane of the shoe bottom for clamping the margin of the pulled-over upper against thesole, and fastening inserting means for securing the `margin of the upper to the sole.

2. 4In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin ofthe upper at opposite sides of the forepart of the last, a toe gripper for seizing themargin of the upperat the toe end of the last, power-operated mechanism for imparting to the support movement in a direction heightwise of the last to pulll the upper over the last, means movable in a-direction inclined toward the plane of the shoe bottom for clamping together the margins of the upperand the sole, a fastening inserting mechanism, and means for actuating the fastening inserting mechanism 'to insert fastenings securing the up-J per'to the sole.

3. In a machine for Working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin ofthe upper at opposite sides of the forepart of the-last,r a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for effecting relative movement of the support and the grippers heightwise of the last-f-to-pull-the upperfover the last, -means-lforclamping the margin of the pulled-over upper" against the sole, means for opening the toe grip-j' per before the margin ofthe upper is thus' clamped, and fastening inserting means for securing the'margin of the upper to the sole.

4. In a machine for Working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the lolast, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for effecting relative movement ofH the support and the grippers heightwise of the means for operating said toe and side grippersVV to release the upper at predetermined diierent times in the operation of said clamping means'.

5. Ina machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the upper at the toe end of the last, power-operated mechanism for effecting relative movement of the support and the grippers heightwise of the last to pull the upper over the last, means for clamping the margin of the pulled-over upper against the sole, means for opening the toe gripper before the margin of the upper is thus lthe last, a toe gripper for seizing the margin of' clamped, fastening inserting means for securing the margin of the upper to the sole, and means of the upper is secured to the sole.

6. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power operated mechanism for imparting to the support movement in a direction heightwise of the last ,15V-to pull the upper over the last, means for clamping together the margins of the upper and the sole, means for opening the toe gripper before the margins of the upper and the sole are clamped together, a fastening inserting mechanism, and means for actuating the fastening infor opening the side grippers before the margin serting mechanism to insert fastenings securing Y the upper to the sole.

'7. vvIn 'a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of thelast, a toe gripperfor seizing the margin'of the upper at the toe end of the last, power-operated mechanism for imparting to the support ggf-movement in a direction heightwise of the last topull the upper over the last, means for clamping together the margins of the upper and the" sole, means for opening the toe gripper before' the margins of the upper and the sole are clamped fi-itogether,l a fastening inserting mechanism, meansv forI actuating the fastening inserting mechanism to' insert fastenings securing the upper to the sole,` and means for opening the side grippers before the fastenings are inserted.

8.-In Va machine for Working shoe uppers over Y lasts, a support for a last with a sole and an-upper Y thereon, side grippers for seizing the margin of i.

the upper at opposite sides of the forepart of the vlast,a toe gripper for seizing the lmargin of the I'751up'per1at the `toe lend -oflfthe f last,\poweroperated.

mechanism for effecting relative movement of the support and the grippers heightwise of the last to pull the upper over the last, means for clamping the margin of the pulled over upper against the sole, and fastening inserting means associated with the side grippers for securing the margin of the upper to the sole.

9. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at oppsite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for imparting to the support movement in a direction heightwise of the last to pull the upper ovei the last, means associated with the side grippers for clamping together the margins of the upper and the sole, and fastening inserting means for securing the margin of the upper to the sole;

10. In a machine for Working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for imparting to the support movement in a direction heightwise of the last to pull the upper over the last, means associated with the side grippers for clamping together the margins of the upper and the sole, means for opening the toe grippers before the margins of the upper and the sole are clamped together, and fastening inserting means also associated with the side grippers for securing the margin of the upper to the sole.

11. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for imparting to the support movement in a direction heightwise of the last to pull the upper over the last, means associated with the side grippers for clamping together the margins of the upper and the sole, means for opening the toe grippers before the margins of the upper and the sole are clamped together, fastening inserting means also associated with the side grippers for securing the margin of the upper to the sole, and means for opening the side grippers before the margin of the upper is secured to the sole.

12. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for moving the support in a direction heightwise of the last from an adjustable initial position to a fixed elevated position to pull the upper over the last, means for clamping together the margins of the upper and the sole, a fastening inserting mechanism, and means for actuating the fastening inserting mechanism to insert fastenings securing the upper to the sole.

13. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for moving the support in a selected direction heightwise of the last from an adjustably variable initial position to a xed elevated position to pull the upper over the last, means for clamping together the margins of the upper and the sole, a fastening inserting mechanism, and means for actuating the fastening inserting mechanism to insert fastenigs securing the upper to the sole.

14. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for moving the support in a direction heightwise of the last to pull the upper over the last, means for adjusting the initial position of the Work support to vary the direction of movement of the work support into a xed elevated position, thereby varying the extent of lengthwise pull imparted to the upper, means for clamping together the margins of the upper and the sole, a fastening inserting mechanism, and means for actuating the fastening inserting mechanism to insert fastenings securing the upper to the sole.

15. In a machine for Working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for moving the work support in a direction heightwise of the last into a Xed elevated position to pull the upper over the last, said mechanism including parts relatively adjustable to vary the direction of said movement and thus to vary the extent of lengthwise pull impartedto the upper, means for clamping together the margins of the upper and the sole, a fastening inserting mechanism, and means for actuating the fastening inserting mechanism to insert fastenings securing the upper to the sole.

16. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, power-operated mechanism for moving the support in adirection heightwise of the last to pull the upper over the last, means for adjusting the initial position of the work support to cause it to have a component movement heelward of the last during its height- Wise movement, means for clamping together the margins of the upper and the sole, and a fastening inserting mechanism adapted to drive fastenings securing together the margins of the upper and the sole.

17. In a machine for working shoe uppers over lasts, a support for a last with a sole and an upper thereon, side grippers for seizing the margin of the upper at opposite sides of .the forepart of the last, a toe gripper for seizing the margin of the upper at the toe end of the last, poweroperated mechanism for moving the support in a direction heightwise of the last to pull the upper over the last, means for' determining the direction of said heightwise movement to cause the work support to have a component movement lengthwise of the last during its heightwise movement to increase the extent of the length- Wise pull imparted to the upper, means for clamping together the margins of the upper and the sole, and a fastening inserting mechanism adapt- I azi-'zarsen edto'drive'fasteningssecuring .togetlierfthe:mar-.ifv

ginShpf-the lipperfand .fthe sole. i

18.1%InA .a :machinefforf .workingfishoe-:'uppersl f forepart Pof-thelasta a toev gripper-.for.seizingtthe f i margin of the upper at the toe end of .the'lastrl power-opmated-mechanism 'for `am'oving.' thensup portina direeti'oniheightwise of the'last vtopull th'ruppereover thezlast, means: for'.adjustingi'the'-- initial .zpositionsof '..the works' support .to' causev it tohavel a component' movement 'toewardfof the lastaduring -its heightwise movement, means'ior' r clarn-pingztogether `the margins of o the?. upper fandzthe'sole;A 'and a'. fastening ,..insertingf mecha;

nism .fadapte'dr` to .drive' fastenings securing". togetlier'the'marginsof 'the' upper-'and the' sole;

19iiIn a machinefor working shoe uppers :over

las-t'sg-'a support'rforia last with a sole' and an upper'f.1thereon', grippers'forlseizing the margin of :the uppera linkffor-'e'levating the supportto l pul-l-.the .uppery over thelast', a guide member for that linkifa pivctabout whichthe guide member' is adjustableg'; a sliding?fconnection'.'between the.v linfknan'd'ethe.r guidermerrrber; and', means` for .so operating. the''linl; 'that-at .the end of its1opera-x'.

tive` stroke ftheslidingconnection is .positioned I' infalinement :with said'pivot.

205:A In a machine-for Working shoe uppers over upperf thereon, grippers `for "seizing 'the margin r. of-the upper; a linkv for' elevating the support to pullrrthevupper over theI last, a guide member for that-link, a connection between the linlr and the guideimember, the connection' being 1 movable withirelationto the guide member .on'elevation of=.thework;support, means or'moving the connection-.to a predetermined: Xed point'so as to elevate.the=vvorkfsupport,V and mean-s for adjusting. the guide' member-'aboutsaid x'ed point. 21. In a machine for lWorking'shoe uppers over lasts,.-a supportior a last -with a -sole and an upper@ thereon, grippers forseizng' themargin` of .theauppen .a heelreston-the support, a toe' gage?v cn.-the`.support,means for adjusting the; heelrest and the toe gage in` the longitudinal.- direction. .of the .support and -for adjusting .the heelrst heightvvise of the. support.. andA means for elevating the work support .to pull .theupper over the last.

22.`In"'a machinefor working shoe uppers over las'ts','`a support fora last'with a sole .land an upper'thereon, side "grippers'and a toe gripper for'seizn'g'themarginlof 'theuppen a toe gage on the"support','me`ans" for simultaneously. adjusting' theit'oe gage'and thetoe "gripper 'in'.the lon:VV

gitudiri'al 'direction -of 'the'J support," and' means for elevating the work support to pul1`the' upper over ftheli'ast.'

23.?In fa' machine for'workingshoe uppers over lasts-a support for'a lastK WithHa sole and an upper` thereon, Vside gripper-s and' a'A t'oe'fgripper` for seizing=the"margin lof theupperja heelrest-'on the'support-f'a toe gage'hon the lsupp'ortj-'means means for' elevating 'the' support to 'pull the upper overt/he llast.

24:51u "a machineior'workingf'ishoeuppers over lasts/"a supportxiorfa .lastlwithfa sole1-and'.an1' upper there'en,.'sidel grippers' I and 1a toer-gripperv 11'."

fonfseizingf-theilmarginiofstne upperefa 'heelrest-L" 30 lasts, a supp'ortTor-'a last rwith a sole' and' an' 'i 241 on' the: support; a; toefgagemnthefsupport; meansfc for fadjusting'fthe" 'Yl'ieelrestr in. the: longitudinal r .di-: recti'on'and' heightwisef;` of 'the support; 'meanssz for -sirnultaneously.'l adjusting' the 'toev gage; and.'

.210 thereon; .'grippers including" side grippers :and -toe' grippers "forsseizing' thermargin' of :the-#uppeini.l aroundfvthefforepart of fthe'- las't, power-operate'df-- mechanismA forf'moving .the 'support heightwise ofc; ther-last to '.pul1.'the"upper over the' '1ast,. means ,1 Comprising ,'a `sole-engaging 'Ymember z andi .lanas upp'eree'ngaging' vmember for T clamping: together'? the-.':marginsxof I'the 'upper and the' sole.; meansrre forfpositivelyy movingthe .sole-'engaging member into 'l clamping'zposition', means: for yielding'lyf;J ,moving the upper-engaging member'into clamp-.efingvfposition; 'an'd .\fastening" inserting.: means adapted Ito f secure together the margin-s :of thesi uppery and' thefsole.' 26. In :a maehineforfworking shoe uppersV over 7'; lasts', a support for '-a last with a sole and' any; upper thereonggrippersf-including sidegrippers 'r andxtoe grippersffor 'seizing'the margin of the upper faroundrthe. forepart' Vof :a last, 'poweroperated' 'mechanism' for :moving 1 the' supportiA heightwiseroffthe'last-:topull the upper'over the last,v meansf'comprising .a sole-engaging mem-fil` beran'd an'upper-engaging member forf clamp-1.'A ing-:togetherv themargins'iof the :upper and 'ther' 'f sole'j'means `for positively 'moving` the' soleeenf-'fI .gaging a member vinto 'clamping r position, meanszwfor locking the sole-engaging member in clampy ing. position; means f'. for'.' yieldingly '.moving the upper'engagin'gim ember'finto' clamping position; a and fasteningl 'insertingy mean-s" adapted. to inserte 'c fastenings tosecure'.' together lthemarginsf ofthe* upper 'and :ther solel 272:'In a;machinezfor'working'shoe=uppers over lastsgza support'zfor a last .with a projecting 'sole-"- andupperffthereon', grippers, including4 'side gripe' ipersg'fforfseizingthermargin of the upper, power-'- operated 'mechanism'i'for effecting :relative move-J'- ment'of ftheisupport and. the grippers heightwise f ofiY the" last v=to pulls-the supper over. the lastf. staplingl' mechanisms f.- yassociated with: the' v"side .z .grippers' and comprising-teach :a sole-engagingf-. anvil', 1wireefeeding'imechanisrm staple-forming; i mechanism; staple-inserting. meansrandua throat; l.. an'da single member'a'dapted' to move thefanvilto clamp the margins of the upper and the sole'f againstzthefthroat'and' to operate thewirefeeding mechanism the'. i staple'forming mechanism and .f r the: staple-:inserting means '.in timedI sequence. f

282 In a machine-for workingshoeuppers over@ lasts,- a support-:fora last with a projecting sole@ 60andlsupperfthereon;i gri'ppers, including sidev grippers; f or JS'ei'Zing.. the r margin `ofthe uppem: f poweroperatedr mechanism for effecting relative movement of the'supportandthe' grippers height- Wisexof'rthe'A last'l to'fpull :the upper` over the. 6521astfstaplingdnechanisms associated 'with the side@ grippersi-'fandx comprising each a sole-engaging anvil; .wire-feeding '.'mechanism,V staple-forming@ mechanism, 4a f.'stapleeinsertngfrdriver' and-ra i throat; and'.'='a single,"'memberA adapted: to move 70"ftheianvilf'to .clamp 'tl'ieimarginsf of theI upperfan'd the solez'against 'therlthroat :and `to cause 4it .toe

beheld` locked .'in 7clamping.` .posit-ion; and simul-e taneously .to operate the'wireefeedingsmechanism a: and-thereafter `:sto #operate VVAthe. stapleeforminge; W 'mechanismz andnfnally the @driven i

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