US2556410A - Toe lining trimming machine - Google Patents

Description

W. A. BARKER TOE LINING TRIMMI NG MACHINE June 12, 1951 7 Sheets-Sheet 1 Filed June 13, 1950 Int/9211 0? Z WZZL'am A Bar/rer- June 12, 1951 w. A. BARKER TOE LINING TRIMMING MACHINE 7 SheetsSheet 2 Filed June 13, 1950 12212011 for VW/[iamfl Bar/fer B L's/I2 riey June 12, 1951 w. A. BARKER TOE LINING TRIMMING MACHINE 7 Sheets-Sheet 3 Filed June 13, 1950 in ven for W/fiamfl Bar/f r June 12, 1951 w, KE 2,556,410

- TOE LINING TRIMMING MACHINE Filed June 13, 1950 '7 Sheets-Sheet 4 v Ira/49171107 7 Sheets-Sheet 6 Invenior mutant/[Barker MMING MACHINE June 12, 1951 Filed June 15, 1950 June 12, 1951 W.'A. BARKER 2,556,410

TOE LINING TRIMMING MACHINE Filed- June 15, 1950 7 Sheets-Sheet 7 sometimes a doubler.

Patented June 12, 19 51 TOE LINING TRIMMING MACHINE William Arthur Barker, Leicester, England, as-

signor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application June 13, 1950, Serial No. 167,762 In Great Britain August 24, 1949 This invention relates to trimming machines and more particularly to machines for severing unnecessary upper material in the toe areas of shoes being prepared for toe lasting. Prior to this trimming operation a partially fabricated shoe will normally have had the overlasted margins of the upper fastened to the insole as far forward as the tip line. Ahead of that line a special precaution is essential so to eliminate the surplus lining materials as to facilitate obtaining a smooth and neat appearing upper when tensioned over its last and attached about the toe to the insole.

Toe upper material commonly comprises, in-

addition to an outer layer of leather or fabric, such inner layers as a lining, a toe stifi'ener and The several layers may differ considerably in such characteristics as toughness and thickness when used in various makes of shoes. A machine found to yield good trimming results has hitherto provided means including a toe-receiving bed for holding a shoe bottom up, trimming means movable in shearing relation to the bed and means for spreading the toe lining margins on the bed ahead of the trimming means. For a machine of this type to be sufficiently versatile to operate satisfactorily on large numbers of different types and styles of shoes it is now recognized that its work holding means and operating instrumentalities must be adjustably organized and suitably correlated in time and relative position throughout a working cycle.

An object of this invention, therefore, is to provide an improved toe lining trimming machine of the type referred to which shall be efiicient, highly adaptable and easily usable in preparing widely different sizes and shapes of shoes for toe lasting.

In accordance with this object, one feature of the invention resides in the provision in a trimming machine of the type referred to of members for lining the aforementioned toe receiving bed and means for adjusting their heightwise position relative to the bed whereby shearing may effect trimming of variable depth or produce a selected overall thickness in the marginal upper material.

Another of the various features of the invention relates to a novel arrangement and coordination of the work holding means and operating instrumentalities whereby shoes may be presented bottom up for trimming by themachine in a convenient manner, an insole engaging roll being mounted for cooperation with a toe supporting 4 Claims. ('01. 1283.5)

roll to facilitate initial location of the toe portions with respect to the shearing means.

The above and other features of the invention together with novel arrangements and combinations of parts will now be described in more detail in connection with an illustrative embodiment, reference being had to the accompanying drawings, in which:

Fig. 1 is a side elevation of an exemplary machine in which the invention is embodied, a shoe being shown in operative position;

Fig. 2 is an enlarged side elevation of the upper part of the machine shown in Fig. 1;

Fig. 3 is a plan view of a shearingblock assembly;

Fig. 4 is a view of parts shown in Fig. 3 looking looking in the direction of the arrow seen in that figure;

Fig. 5 is a side elevation, partly in section, of the shearing block assembly, toe supporting roll and associated wiping mechanism;

Fig. 6 is a front elevation of the shearing block assembly;

Fig. '7 is a front elevation, partly in section and viewed in the direction of the arrow in Fig. 2, of trimming mechanism when raised above the shearing block;

Fig. 8 is a side elevation, portions being broken away and disclosing instrumentalities in initial inoperative positions;

Fig. 9 is a side elevation, partly in section, of elements shown in Figs. 5 and 8 but at a subsequent stage when trimming is about to commence.

Fig. 10 is a side elevation of mechanism for operating the shoe supporting roll; and

Fig. 11 is a plan view of parts shown in Fig. 10.

The illustrative machine is a toe lining trimming machine of the type disclosed in United States Letters Patent No. 2,260,483, issued October 28, 1941, and 2,287,275 issued June 23, 1942, on applications filed in the name of W. T. B. Roberts, and also resembles in some respects certain features of construction set forth in'Uni'ted States Letters Patent No. 2,466,798, issued April 12, 1949, and granted On application of H. E. Elliott et al. The illustrative machine embodies improvements over both the Elliott and Roberts machines and in these respects will be described in detail though it will suffice if present structure common to either of these earlier disclosures is hereinafter but briefly mentioned.

As viewed in Fig. 1, the machine frame comprises a base A, an intermediate column B, and a head C inclined to enable an operator easily to view the work to be performed therein. As in.

the machines of the patents cited, a shearing block assembly generally designated it comprises articulated blocks l2, M (Fig. 3) with flat upper shearing faces and having inner faces curved to correspond generally with a portion of the toe of an upper on an inverted last, as shown in Fig. 1. The blocks H2, M are respectively secured to carrier blocks l8, l8 (Fig. 3) and the latter are provided on their upper faces with concentric recesses 22: respectively. The carrier blocks l6, iii are peripherally slidable in a rotary housing including a body 23 (Fig. 6) having a circular interior surface 29 (Fig. 3), a base plate 39', and a cover plate 32, all secured together as by screws 3 An arouate guide plate 25?: affixed to the cover plate 32 extends into the concentric recesses 24 and 25 thereby retaining. circular exterior portions of the blocks it, IS in engagement with the body 28. The base plate 39 is dovetailed for rotatable engagement with a correspondingly formed slideway portion of the column B. Bearing on: the base plates!) and; this slideway portion is a clamp plate 33- (Fig. 6). B'oththeslideway and clamp plate are bored to receive a locking bolt 35, the turning of which serves toloosen or secure the shear block assembly it in adjusted position in the machine.

Means are provided (Figs. 3, 4.) for adjusting the carrier blocks Hi, [82 with respect to each other and; to the body 28 by movement about the axis of its surface 29:. The carrier block it has a: bifurcated arm 31 extending toward the carrier block l8 and: carrying a pin 38f provided with a left-hand; threaded bore. Similarly, the carrier block it has a bifurcated arm All for carrying a pin. 22' having a right-hand threaded bore. A rod. 4-4 extending through a portion of the body 28 has oppositely handed threaded portions received by the pins 38, t2 respectively. Rotation of. the rod: 44 accordingly moves the pins together or apart and so causes the space between the articulated; blocks i2, is to be enlarged or diminished as they are thus simultaneously moved suitably to accommodate any particlar size and shape of toe portion to be trimmed.

Inner lining members 66; 48' (Figs. and 6), over which the margins of the upper are to be spread, are, as. will" now be explained, mounted for movement heightwise of the shear blocks I2,

M as well as pivotal movement concentric with the axis of the shear block body 28. The membars 46,. 48 are arcuate, have top shearing faces inclined upwardly to the shearing faces of blocks 12,. I4, and are seated on an arcuate flange 50 formed at the top of a vertical slide 52. The latter; as. best seen in Fig. 6, is movable height- Wise in a guideway 5% by means about to be described. The guidew-ay 5% is supported by the base plate 39. The members 45, 58 are mated and. mounted for pivotal movement about a common pivot stud 56 threaded into the flange 5H3. the stud having an axis coincident with the axis of the body 28. For retaining the members 46:, 4B in sliding contact with the flange 50, an arcuate plate 5% engaging a shoulder portion of the members 46, A8 is spaced from the top of the flange; 5% by studs 89, 52 (Fig. 3) threaded into the latter. The lining members 86, 43 are maintained in contact with the inner faces of the articulated shear-blocks i2, Hi by means of strips 64, 66 which are attached to the carrier blocks i5, i8 respectively and engage slots formed in said members. The bottom of the slide 52 is inclined to provide acam face 63 (Fig. 6) engageable with a complementary slidable wedge ill. The. latter is actuated to raise or lower the slide and thereby adjust heightwise distance between the top of the lining members and the shear faces of the blocks 52, i l by rotation of a rod 12 threaded into the wedge and having thrust collars engageable with the guideway M. The slide is yieldingly held in engagement with thewedge W bya spring M.

Ears it are attached to the lining members 46, 18 respectively for the purpose of providing supports against which marginal upper material in the locality adjacent to the endrnost pulling over fasteners may be strained as it is turned outwardly.

As in the patents referred to above, the illustrative machine is provided with operating instrumentalities, about to be described, that are mounted for movement above the shear block assembly it and also provided with other work supporting elements later to be described. Pivot pins 86;. 82 (Fig; 2') mounted transversely in the head. C of. the machine serve as journals for bell cranks. a l; 86 respectively. An arm of each of these bell cranks. is: maintained in phase with an arm of the other by means of a coupling link 88. A. beam 911 is pivotally suspended for parallel upeand-d'own'. movement on. other arms Si, 93 of the bell cranks 84, 88 respectively. The beam 2%! is actuated by means: subsequently described and provided with guideways 92 (Fig. '7) extending from the front to the rear of the machine slidably to support a reciprocable carriage 9 1 on which the aforementioned instrumentalities are mounted.

A pair of rotary trimming knives t6 (Fig. '7) are carried by the carriage 94. Normally, the knives are arranged equidistant from the longitudinal center line between the guideways 92 and their cutting edges are very nearly in contact. Each knife 95 is afiixed to a spindle 88 perpendicular to the shear faces of the blocks l2, I4 and rotatably mounted in a bearing block H19 (Figs; 7 and 8). Both blocks let are adjustably spaced apart to enable the cutting edges to be moved together when the knives are worn, and are secured by a clamping block I62 (Fig. 8) to the under side of the carriage 94. Engagement of the clamping block Hi2 with the bearing blocks is controlled by a hand nut I94 having. a threaded stem extending through the carriage 9 i.v A transversely extending shaft Hi5 (Fig. '7) supported in lugs of the carriage 94 has oppositely handed threaded portions engaging correspondingly threaded bores of the bearing blocks, and turning an extension 583 of the shaft we, when clamping pressure has been temporarily relieved by the hand nut EM, moves the blocks "in and consequently the knives 98 together or apart.

The left-hand knife 96, as viewed from above in Fig. '7, rotates counterclockwise while the other knife 95 rotates clockwise. For this purpose a knife driving shaft EH! extends transversely through the blocks ii -6 and has spiral gears H2 respectively meshing with spiral gears M5 on each spindle 9B. A spiral gear H5 mounted on each end of the shaft lit meshes with a spiral gear its on the forward ends of the shafts l2il, r29 (Fig. 2) extending on each side of the machine, said shafts to be again referred to hereinafter. Each of the shafts 529 is driven by a pulley i 22 rotatably mounted on a bearing 24 supported by the beam 98. The pulleys 22, 22 are driven by belt and gear connections (not ing rod I38.

shown) with the driving pulley shaft of the machine.

As in the Elliott patent referred to, the illustrated machine is provided with two sets of three upper margin lifting and outturning members I 30 (Figs. 2, 7 one set to operate on each side of the toe and shear block assembly II], the novel mechanism for actuating and adjusting them for use on different widths and styles being suspended from both sides of the beam 90 as will now be described. As the arrangement is similar on both sides of the machine, it will suifice to describe the elements as organized on one side only, as shown in Figs. 2 and '7. Each member I30 extends transversely of the machine and is fulcrumed on a curved link I32 (Fig. 7) the lower end of which is pivotally connected to one arm of a bell crank I34. The three bell cranks I34 are alined and pivotally mounted in a bracket I 36 extending beneath the members I30. The other arms of the respective bell cranks I34 pivotally carry an end of an adjust- Each rod I38 is threaded through a swivel block I46 supported by the bracket I36. For a purpose subsequently to be described two nuts I42 and a collar on each of the rods I38 constitute an adjustable abutment with the inner face of the block I40, while a compression spring I44 engageable with the outer face of the block extends to a knurled head I46 formed on the outer end of the rod I383.

The bracket I36 comprises two parallel arms and a bridging portion, the arms being pivotally supported by coaxial pins respectively mounted in the lower ends of the two links I46. The upper ends of the links I43 carry a pin I59 extendin through a vertical slide I52. An upper portion of the latter rotatably supports a cam roll I54 having engagement with a cam track I55 extending forwardly and rearwardly in the beam 90 and generally parallel with the inclined path of the carriage 94. The cam tracks I56, I55 on opposite sides of the beam 90 are formed to move the slides I52 vertically at predetermined stages in the cycle of movement of the carriage 94, the outturning members I30 thereby being appropriately raised from contact with the work margins after progressin longitudinally thereof and while continuing to move inwardly and outwardly of the shoe bottom. During inoperative forward movement of the car riage 94 the cam tracks I56 permit the members I30 to be lowered to their margin engaging levels.

The bracket I36 is also supported on two coaxial pins I58 mounted in a swingable yoke I60. The latter straddles the three outturning members I30 and comprises two parallel curved levers I52, I62 joined by bridging portions. Plates I64, I66 respectively project from the carriage 94 coaxially to support the fulcrum pins I68, I68 on which the respective levers I62 are pivotally mounted. An arcuate slot I in the plate I64 is concentric with the axis of the pins I68, I68. In the plate I66 three holes I12 are arranged in an are also concentric with the axis of the pins I66, I68. A red I14 extends through the slot I10, through the yoke I 60, and through a selected hole H2 in which the rod I14 may be locked. Spaced along the rod I14 are three links I16, each pivotally connected with an arm of an eccentric I18 mounted on the shaft I20. The three eccentrics I'IB are angularly oifset 120 and another arm I80 (Figs. 2, '7) of each eccentric is connected to an outturning member I30. 7

The construction just described enables the range of the outturning members I30 to be ad-- justed widthwise, i. e., moved toward or away from the center of the machine. Thus, referring to Fig. '7, when the rod I14 is adjusted counterclockwise, the links I16 rotate the eccentrics H8 in a similar direction, thereby shifting the arms I and hence the members I30 outwardly. The yoke I60 during this adjustment is rotated counterclockwise about its fulcrum pins I68, I68, causing the bracket I36 and bell crank I34 to move upwardly but the latter advantageously does not change the angle relation between the outturning members I30 and the links I32 by which said members I30 are supported. The heightwise position of the work engaging portions of the members I36 may be adjusted by suitably rotating the nuts I42 on the rods I38, and the pressure with which the members I30 engage an insole is regulated by turning the knurled head I46, springs I44 causing the engagement to be yieldable. From the above it will be seen that the work engaging portions of the members I30 move in a widthwise path as in the machine shown in the Elliott et a1. patent previously referred to, that each work-engaging portion moves out along a straight line and returns lifted in a semicircular path out of contact with the work, and that the bracket I36 and yoke I60 permit widthwise adjustment of the outturning members I30 without distorting their operating paths. The shaft I20 is preferably rotated at a speed to effect about three or four outward movements of each outturning member as the carriage 94 moves the knives 96 rearwardly in their trimming stroke.

Thirteen upper pressing fingers I82 (Fig. 8) are individually pivoted on a red I 84 supported by a. bracket I66 secured to the carriage 94. A rearward face of each finger is engageable with one arm of a spring I88 fixed to the bracket. A shaft I90 extends through the bracket I 86 and supports a crank I92 in which an adjustable stop I94 is threaded. The stop I94 bears on the other arm of the spring I 88 and thereby provides independent pressure for urging an individual finger toward the work, movement in such direction being limited by engagement of the finger with a face of the bracket I86. A vertical worm shaft I96 meshing with a worm sector secured to the shaft I90 may be utilized to adjust the pressure exerted by the finger I82. A pair of rollers 200, corresponding with rollers in the Elliott et a1. machine, are arranged near the knives 96 and at opposite sides of the fingers I82 to press the outturned margin upon the cutting block assembly I0 before trimming. These rollers are also supported by levers pivotally mounted on the rod I84 and spring means is provided to enable adjustable pressure to be exerted by the rollers on the work as they move rearwardly.

As in former machines of this type the illustrated machine includes a sole abutment 202 (Fig. 1) a heel end abutment 204 (Fig. 1), and a shoe supporting roll 266 (Figs. 1, 5) for holding the shoe against undesired movements during the cycle. These work supporting means about to be further described are effectively coordinated with the operating instrumentalities throughout a cycle. In the illustrative machine the operating cycle commences with the carriage 94 in its most rearward position and raised by upward movement of the beam 90 from its trimming level. Accordingly, the carriage is initially moved toward the front of the machine and elevated to support the operating instrumentalities out of contact with the marginal upper material which is then not being held down upon the shearing blocks [2 and It. An insole engaging roll 265 (Fig. 5) and the shoe supporting roll 226 are mounted for cooperation in a novel manner to limit the extent to which the latter can thrust a shoe toe upwardly with respect to the shear block assembly I 6.

The insole engaging roll 268 is retractably mounted rearwardly of th shear block assembly [2, this arrangement enabling an operator properly to lock a shoe heightwise of that assembly without danger of fouling the knives 26 when, in the next cycle, they are again lowered and moved rearwardly. The roll 268 is rotatably mounted on a pin fixed in a forward end of a lever 2H? fulorumed in lugs of a carrier 212 (Figs. 8, 9). The bottom of the latter is provided with a T-shaped slideway adapted to engage a guide rail 2M. The rail 2M is secured to a housing 256 which is pivotally mounted on a pin 2 I 5 supported by lugs extending from the column B. The housing 2l6 is provided with side flanges bridged by a cover plate 213. Identical slots 226 formed in each of the side flanges are respectively engaged by cam rolls 222 carried one on each side of the lever 2H3. The cam slots 226 are so formed that, when the carrier 2l2 moves rearwardly to retract the roll 208 from operative position, the rolls 222 are forced downward to lift the insole engaging roll 268 clear of the outspread upper margin and later the rolls 222 are forced upward to swing the lever 2 I 6 and thereby lower the roll 268 to a position where the continued rearward'movement of the knives 96 will not be obstructed.

For moving the carrier 2|2 rearward a lug 224 (Fig. 8) projects from the carriage 94 for engagement with a projection 22% on the lever 2H1. As the carriage 92 moves rearward the lever 2! (Fig. 9) is accordingly moved rearward and against the resistance of a coil spring 228 connected thereto and mounted on the housing 216. The roll 268 then having been shifted behind the shear block assembly l6 and the projection 226 having been disengaged from the lug 222, a spring loaded pawl 226 pivotally secured to the housing 2 l6 restrains the lever 2 l 6 from return movement by engaging a notch provided in the carrier 212. As the machine cycle ends, the knives 96 having passed over the lowered insole engaging roll 268, another lug 232 on the carriage 94 trips the retaining pawl 236 and frees the carrier 212 so that the lever 2 It may be returned to its forward and operative position by means of the spring 228.

Means are provided whereby the roll 268 may be adjusted to position shoes heightwise appropriately with respect to the trimming plane of the knives 66. The housing 256 is urged by'a compression spring 23 seated therein and bearing on the column B to engage the periphery of an cecentric 236. The latter is supported on a shaft rotatably mounted in lugs of the housing 2 l6, the shaft having afiixed at one end a serrated disc 238. A spring pressed plunger 24!! engageable with the disc 236 prevents undesired rotation of the eccentric, and turning of the shaft adjusts the periphery of the eccentric 236 suitably to shift the housing 216 about the pin 2 l5, thereby moving the roll 268 as desired with respect to the knives and the shear face.

When presenting a shoe bottom up to the machine the toe end is inserted in the shear block assembly Hi, the insole being lightly held against the insole engaging roll 208 and the sole abutment 262. The heel end abutment 2M and shoe supporting roll 206 are thereafter also utilized to hold the work as will be described. The roll 266 may be rubber covered and is rotatably carried by a forked rod 242 (Fig. 5) slidably mounted in a trunnion 222. The latter is rotatable in an arm of a bell crank 226 pivotally supported by a pin 228 secured to the column B, the other arm of the bell crank 226 carrying an adjustable stop screw 256 that is yieldingly retained in engagement with the column B by a spring 252. The roll 206, by means of the screw 25!], is adjustable forwardly and rearwardly and can be swung so as to facilitate removal of the shear block assembly Iii when desired. The rod 242 (Fig. 5) is pivotally mounted on a pin 254 received by the forked end of a member 256 (Fig. 11) fulcrumed on coaxial pins 258, 258 having bearings in the column B. A rod 260 passes through a portion 262 of the member 256 and carries a spring 264 engageable with the portion 262 and a hand nut 265 (Fig. 10) threaded on the rod 260. Rotation of the hand nut 266 adjusts upward pressure exerted by the roll 266 on a shoe before the locking mechanism about to be described becomes effective.

A wearing plate 268 is affixed to the member 25%. A roll 2'!!! rotatably mounted in the forked end of a lever 212 is engageable with the plate 268. The rod 260 is pivotally connected to the forward end of the lever 212 and the rearward end of the latter is connected by a rod 214 to a treadle 276. A pin 2T8 fixed in the member 256 passes through an arcuate slot in the lever 212. The spring 264 accordingly causes the lever 212 to be supported on the roll 216 and the lower end of the slot is urged against the pin 218. The lever 212 pivotally supports a forked link 280 (Figs. 8, 9) connected to a locking lever 282 comprising two parallel arms that are joined at their rearward ends by a bridging plate and a locking plate 254 (Figs. 9, 10) bolted to the bridging plate. The locking lever 282 extends through a rocking frame 286, and both the lever 282 and frame 286 are pivotally mounted on coaxial fulcra 26% (Figs. 9, l0) journaled in the column B. A shaft 226 pivotally connected to the member 256 extends through bearings formed in the frame 286 and is arranged to slide therein and through a hole in the lockingplate 284 in a direction at right angles to the fulcra 288. The locking lever 282 and rocking frame 236 are yieldingly held in engagement by a spring 292, and an adjusting screw 294 extends through a portion of the frame 286 to abut the plate 28 1 thereby enabling alignment of the hole in the locking plate with the bearings of the shaft 266 in the frame.

Depressing the treadle 2'56 first moves the mem her 256 and the lever 272 as a unit about the coaxial. pins 258, the shaft 292 sliding through the locking plate 28% until the roll 266 li htly clamps the shoe against the insole engaging roll 268. Further depression of the treadle eff-ems yielding of the spring 22:1 and allows the lever 222 to rock on the roll 2'56. The link 2% consequently is shifted downward causing the locking lever 282 to move the locking plate angularly and bind the shaft 260 against further movement. The member 256 is thereby prevented from further movement and the shoe supporting roll 25% is locked against heightwise displacement of a shoe even when the insole engaging roll 222 is withdrawn from the shoe bottom.

As is the case in former machines of this type, particularly the one disclosed in the aforementioned Patent 2,260,483 to Roberts, the heel end abutment 204 is so arranged in the illustrated machine that when a hand lever 296 (Fig. 1) is raised, initial movement of the latter causes the abutment to move rearward to engage the heel end of a shoe in the machine and urge the toe into the recess of the shear block with sufficient pressure to allow the operator to release his hold of the shoe. Further movement of the hand lever then trips clutch mechanism enabling power means to urge the abutment more firmly against the shoe to hold it against longitudinal move ment during the trimming. To facilitate removal of the trimmed shoe at the end of a machine cycle and insertion of the next shoe,the present machine also includes means for guiding the abutment 20 3. It is provided with an inverted T- shaped cam slot 298 engaged by a cam roll 38f! supported by the column B. As the cycle ends the heel end abutment is shifted upward by the slot 290 and roll 300 to a position indicated in phantom form in Fig. l. The next shoe may then be readily raised into operating position in the machine. Initial movement of the lever 296 lowers the abutment 282 until it engages the heel portion of the shoe and then, under influence of further motion of the lever 296, the action of the remainder of the cam slot moves the abutment rearward in a path approximately parallel with the trimming plane of the knives 98.

When the abutment 284 is being thrust by power into firmer contact with the heel end, hinged wiping plates 302 (Fig. in an arrangement somewhat similar to that disclosed in the patent issued to Roberts 2,287,275 are moved upwardly by power mechanism including a bracket 304 for contact with the toe portion adjacent to the lining members 46, 48. The plates 382 thereby assure that the upper will be held in its pulled-over condition during trimming and they are automatically lowered from the work at the end of a machine cycle.

It has been noted above that the beam 90 is suspended on the bell cranks 84, 86 for up and down motion with the reciprocable carriage 94. Reciprocation of the latter on the guideways 92 is provided by rods 364 (Fig. 2) which pivotally connect the carriage 94 with a power operated lever 306. The lever 306 is rocked about a fixed fulcrum as in the Elliott et al. machine referred to above by an eccentric 308 (Fig. 2) mounted on a power driven cam shaft 3l0. For oscillating the beam 90 up and down in timed relation with the reciprocation of carriage 84, a bell crank 7 and insole engaging roll 208.

3E2 is pivotally mounted on a pin 3l4 supported by the column B and one arm of the bell crank 3l2 carries a roll 3E6 engageable with a cam 3H3 also mounted on the shaft 3l0. 'The other arm of the bell crank 3|2 pivotally supports a, block 320 slidably mounted on a rod 322 which is pivotally connected to an arm 324 of the bell crank 86. A spring 328 on the rod 322 is held in engagement with the block 320 by a nut and assures that a yielding upward thrust on the rod 322 and the beam 90 will be exerted by the bell crank 3I2.

Means are provided whereby the knives 96, when lowered by the beam 90 into their trimming plane for rearward operative movement, may be precisely adjusted heightwise relatively to the shearing faces of the blocks l2 and [4. A stop 328 (Fig. 2) is threaded into the beam 90 and when the latter is in its lower position the stop 328 engages a fixed stop 330 projecting from the head C. Rotation of the stop 328 accordingly adjusts the lower limit of the beam 96 heightwise and therefore the carriage 94 and knives 96 as Well. To look the knives in their operative level against thrust which may be exerted upwardly by the work during trimming, the arm 324 (Fig. 2) of the bellcrank 86 carries a roll 334. A bell crank 336 pivotally mounted in the head C on a pin 338 is provided with a wedge face 340 formed eccentrically with respect to the pin 338. A rod 342 is connected to the bell crank 336 and carries a block 344 supported by a bell crank 346 mounted on the pin 3| 4. The block 35 5 is urged upwardly by a spring 348. The bell crank 346 is actuated by a cam 350 mounted on the shaft 318 and is so timed relatively to the mechanism urging the knife carriage 94 rearwardly as to cause the face 340 to wedge beneath the roll 38 just as trimming is to commence. The spring 348 assures adequate wedging even though the roll 334 be slightly raised due to adjustment of the stop 328.

In operating the illustrative machine the toe portion of a shoe will be presented for engagement with the shear block assembly l0, the lining members 46, d8 having been suitably pivoted by means of the rod 44 to accommodate the contour of the toe. Inclined tops of the members 46, 48 will have been suitably adjusted heightwise of the shear faces of blocks l2, l4 to assure shearing of the depth desired. The shoe bottom will be held in engagement with the sole abutment 202 On depressing the treadle 216 the shoe supporting roll 206 is raised to engage the toe and becomes locked in that position as described. Under control of the hand lever 296 the heel end abutment 204 descends from its inoperative position and moves rearwardly to clamp the shoe in trimming position. Further movement of the hand lever actuates clutch mechanism (not shown herein) whereby the heel end abutment further grips the shoe and the wiping plates 302 come into operation. The carriage 94 moves idly to the front of the machine in its elevated position, the outturning members 130 then making ineffective movements and the knives 96 rotating. The beam 60 lowers the carriage 94, knives 96, and outturning members I30 in their most forward position and the knives and other operating instrumentalities are then retracted along a generally inclined operating path parallel with that of the shear face of the blocks l2 and I4. The outturning members I30, rolls 200, and pressing fingers I82 lay the unsecured marginal material against the ears E6, the sloping tops of inner lining members 46, 48, and the shear faces of the blocks [2, I4, and are then raised to an elevated inoperative position by means of the cam rolls I54 and tracks I56. The knives 86 advance toe-ward in shearing relation to the outspread stock, the carriage 94 being effective to clear the operating path by removing the insole engaging roll 208 and also energizing the spring 228. At the end of the trimming stroke the beam raises the knives 96 and the machine comes to rest as the spring 228 is permitted to return the roll 208 to its initial position for locating the next shoe to be trimmed.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a toe lining trimming machine, a toe receiving bed adapted to support the toe portion of a partially fabricated shoe presented bottom up thereto, cutting means for trimming the lining of the shoe, a reciprocatory carriage supporting said cutting means for operative movement longitudinally of the shoe bottom, means for moving said carriage heightwise of the bed in time relation to 11 an operating stroke of the cutting means, and a member cooperative with the carriage moving means for locking said cutting means in operative level with the bed during said stroke.

2. In a toe lining trimming machine of the type provided with cutting means arranged to advance operatively along a shoe bottom toward the toe end and having power means for spreading unsecured marginal material outwardly of the toe portion ahead of the cutting means, a bed for embracing the toe comprising a rotary housing having a portion concentric with a vertical axis, a pair of articulated blocks having inclined shearing faces for supporting the outspread upper, members guided by said concentric portion for respectively pivoting the blocks about the housing axis, means for'moving the members together or apart peripherally to position said shearing faces, arcuate members between the shoe toe and said blocks and respectively actuated by the lastmentioned meansfor pivotal movement therewith, and means for moving said arcuate members heightwise of the shearing faces for copperation with said cutting means whereby diiferent depths of margin trimming may be effected.

' 3. In a toe lining trimming machine of the type having a reciprocable carriage'provided with cutting means arranged to" advance toward the toe and along the shoe bottom in shearing relation with marginal upper material spread outward against a toe receiving block, movable insole engaging means arranged initially to limit the heightwise position off the toe with respect, to the block, a shoe supporting. member movably mounted for cooperation with the insole engaging member to clamp the toe in its heightwise operative position, means actuated by said carriage for subsequently moving said insole engaging means out of the path of the cutting means and out of contact with the shoe, and means for locking the member in clamping position when the insole engaging means is so removed.

4. In a toe lining trimming machine of the type having a reciprocable carriage provided with cutting means arranged to complete an operat-. ing cycle :by being elevated irom a shoe bottom after advancing toe-ward in shearing relation with marginal upper material spread outward against a toe receiving bloek, a shoe supporting member and an insole engaging roll cooperative initially in the cycle to position and clamp the shoe heightwise of the block, said roll being retractably mounted for movement by said carriage out of the operating path of said cutting means, and means energized by retraction of said roll, said energized means being rendered operative on completion of the cycle to return the roll for positioning engagement with the next shoe to be trimmed.

WILLIAM ARTHUR BARKER.

No references cited.

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