US2736910A - Shoe toe lining trimming machines - Google Patents

Description

March 6, 1956 R. L. HILL 2,736,910

SHOE TOE LINING TRIMMING MACHINES Filed Feb. 16, 1955 10 Sheets-Sheet 1 Z Ar In venfor March 6, 1956 R. L. HILL.

SHOE TOE LINING TRIMMING- MACHINES l0 Sheets-Sheet 2 Filed Feb. 16, 1955 Invenfor Roscoe L. JfzZZ mwg l ln 4 March 6, 1956 R. L. HILL SHOE TOE LINING TRIMMING MACHINES 10 Sheets-Shet 3 Filed Feb. 16, 1955 I m wn Inventor fioscog LJfz'ZZ March 6, 1956 R. L. HILL- SHOE TOE LINING TRIMMING MACHINES 10 Sheets-Sheet 4 Filed Feb. 16, 1955 may Inventor B03609 L. )fill March 6, 1956 R SHOE TOE LINING TRIMMING MACHINES l0 Sheets-Sheet 6 Filed Feb. 16, 1955 Invenfor Rosco L-ffz'l March 1956 R. L. HILL 2,736,910

\ SHOE TO E LINING TRIMMING MACHINES Filed Feb. 1 5 l0 Sheets-Sheet 9 Invenfor Roscoe L12 ill March 6, 1956 R. L. HILL. 2,736,910

SHOE TOE LINING TRIMMING MACHINES Filed Feb. 16, 1955 1.0 SheetsSheet 10 i 7 17d 3 v Invenfor id? f 6 .Ro6'C eI.Hz'lZ United States Patent SHOE TOE LINING TRIMIVIING MACHINES Roscoe L. Hill, Norway, Maine, assignor to United Shoe Machinery Corporation, Flemington, N. 1., a corporation of New Jersey Application February 16, 1955, Serial No. 488,520

21 Claims. (Cl. 1257.6)

This invention relates to trimming machines and more particularly to machines for trimming the surplus lasting margins of the lining materials at the toe of a partially fabricated shoe, similar to the machine disclosed in United States Letters Patent No. 2,582,975, issued Janu ary 22, 1952, on an application of John M. Ewart et al.

A machine embodying the present invention is to be used on shoes of the flat-lasted type in which the lasting margins of the upper materials are secured flush with the insole by tacks or cement, as distinguished from a welted shoe in which they are secured to an upstanding rib formed on the insole. The outer layer of shoe material commonly of upper leather will hereinafter be referred to as the upper and the term lining will, for convenience, be used to refer collectively to the layers backing the upper, these layers including normally alining, a stitf box toe, and frequently an intermediate doubler.

The operation of trimming the surplus lining at the toe takes place after side lasting and its purpose is to reduce the bulk of the material subsequently to be toe lasted. If surplus lining at the toe were not properly severed, bulges in the lining would be formed between the insole and upper as the lasting margins of both the upper and lining are creased and pleated when they are secured to the bottom of the insole. The formation of bulges is to be avoided as it prevents the outsole from beingfastened to the shoe smoothly and neatly. The reduction of bulk is most important on shoes, particularly womens, which have sharply pointed toes formed with a small radius of curvature, since the sharper the curve the more the lasting margins are pleated and consequently greater overlapping occurs.

In toe lasting, the upper and the lining are forcibly wiped over the toe of the last toward the bottom ofthe insole to shape the toe, then they are laid over the bottom of the insole under tension, creased, pleated and secured thereto by tacks'or cement. This toe-forming process tends to stretch the upper and move the margins of the upper and lining past the insole bottom, resulting in more stock to be secured. If trimming takes place without first pre-forming the lining and upper to the toe of the shoe to produce approximately the same amount of margin below the insole bottom as is produced in toe lasting, the excess obtained in the lasting operation results in undesirable bulges. In the above-mentioned patent to Ewart et al., for example, the lining is trimmed as close as possible to the bottom surface of the insole (see Fig. 3) while the upper and lining are tensioned, in order that the additional margin produced by down wiping during lasting will be kept to a minimum. However, applicant has found that tensioning alone is insufficient to move enough of the lining past the insole bottom to trim it at its most desirable location and that a positive down wiping action approximating that which takes place during lasting is required.

It is an object of the present invention to provide a trimming machine which will pre-form the toe of a shoe by wiping, the amount of preforming approaching that obtained in the toe-lasting operation.

Another object of the invention is to provide a machine which will trim the surplus lining of a partially fabricated shoe leaving a lasting margin no greater than that required for eflicient toe lasting without the production of undesirable bulges.

A third object is to provide a trimming machine for rapidly performing the described severing operation in a satisfactory manner on an entire range of shoe sizes made of various materials, requiring only minor adjustments to accommodate the different shoes.

Still another object is to provide a shoe trimming machine in which all the operating elements are yieldable so that any inadvertent malfunction of the machine will not result in injury to the shoe.

To the accomplishment of these objects and in accordance with one feature of this invention there is provided a machine having wiper means shaped to the periphery of the toe of the last and engageable with the shoe upper above the insole bottom, the wiper means being interchangeable to accommodate shoes of different sizes, a shearing bed integral with the wiper means, a member engageable with the shoe bottom for moving the shoe past the wiper means in contact therewith to pre-form the upper and lining to the shape of the last and to move marginal portions of the upper and lining below the shoe bottom and the shearing bed, means for spreadingthe marginal toe portion and the side portions of the lining and upper outwardly of the shoe under tension and in forcible contact with the shearing bed and a trimming cutter movable in a path parallel to the shearing bed to sever excess portions of the outspread lining and skive the upper if desired.

Another feature of the invention resides in the provision of a plurality of easily operated independent adjusting mechanisms; for adjusting the height of the trimming cutter relative to the shearing bed depending on the thickness of the upper leather, for adjusting the shoe relative to the shearing bed to control .theheight at which the lasting margin of the lining will be severed, for adjusting the force with which the upper and lining are tensioned as they are spread outwardly from the shoe, and for adjusting the force with which the outspread upper and lining are pressed against the shearing bed.

Another feature of the invention resides in the provision of yieldable means associated with each element which acts on the shoe in such manner that the shoe will not be injured by an operating element in the event of any inadvertent malfunction of the machine.

Still another feature resides in the provision of a novel toe stop adjustable to locate shoes of different sizes in the machine such that each shoe of a different size occupies the same position relative to the forming and trimming elements.

These and other features of the invention including novel arrangements of parts and details of construction will now be described in detail in connection with a preferred illustrative embodiment thereof, reference being had to the accompanying drawings, in which Fig. 1 is a left side elevation of a machine embodying the invention, portions being broken away and shown in section;

Fig. 2 is a plan view of the machine as seen in Fig. 1 but on a larger scale;

Fig. 3 is a left side elevation on enlarged scale of the operating portion of the machine as seen in Fig. 1, with parts shown in section;

Fig. 4 is a plan view of the operating portion of the machine as seen in Fig. 3, with parts broken away and shown in section;

Fig. is a front elevation of the machine with parts broken away and shown in section;

Fig. 6 is a rear elevation of the machine with parts broken away and shown in section;

Fig. 7 is a section on the line VI I-VII on Fig. 5 looking from below;

Fig. 8 is a detail. plan view of the toe wipers looking from below;

Fig. 9 is aside view on enlarged scale, of the toe, wipers as seen in-Fig; 8;

Fig. 10 is a detail elevation of the toe stop with parts broken away and shown in section;

Fig. l'l is. a detail elevation of the toestop takenin the direction of the arrow XI on Fig. 10;,

Fig, 12' is a section on the line XIIXII-. of. Fig; 10;

Fig. 13' is a section on the line XIII-XIII of Fig. 10;

Fig, 1.4 is a section on the line XIV-XIV of, Fig. 13;

Fig. 15 is adetail view of the toe stop, as seenin Fig. 10, with parts broken away and shown in section, and a shoe being shown in the initial operating'position;

Fig. 16 is a. section on the line XVI-XVI of Fig. 4;

Fig. 1 7 is a section on the line XVIIXVII of'Fig. 4;

Fig. 18-is a section on the line XVIIIXVHI ofFig. 17;

Fig. 19 is a detail elevation of adjusting mechanism for controlling the amount of pressure with which. the materials to be trimmed are pressed against the shearing block;

Fig. 20 is a section on enlarged scale on the line XX- XXof Fig. 4;

Figs. 21 and 22 are views similar to Fig. 15, and showing the, shoe in subsequent stages of the trimming operation;

Fig. 23 is a plan view of the shoe in the process of, being, trimmed;

Fig. 24. is a section on the line XXIV-XXIV of. Fig. 23

Fig. 25 is a diagrammatic plan view of the toe of a shoe about to be trimmed with various areas designated thereon;

Fig. 26 is a diagrammatic view of the shoe bottom as it is being trimmed;

Fig. 27, is a section on the line XXVIL-XXVII of Fig. 5; and

Fig. 28 is. a detail elevation of the trimming, knife and.

means for adjusting it with parts broken away and shown in section.

The operating elements of the machine are contained in a main frame 2 which is mounted upon a suitable base 4 (Fig. 1). Hereinafter the left-hand side of the machine, as seen in Fig. 1, will be referred-to as thefor-ward end' and the right-hand side as the rearward end. and;

a shoe to be trimmed will be represented as having anupper U, a lining L and an insole I. Mounted, upon the base 4 is a motor 6 which drives, by means of, a.

pincers 20, a pair of tip spreaders 22, a tippresser. 24,

a toe lifting plate 26, a toe stop 28, and a trimming knife 29;

The toe wiper 16, best seen in Figs. 7 through 9, is in the form of a pair of curved wiper plates 30, pivotally; mounted on a vertical stud 31 secured in ahead 32 which constitutes the cover for the forward portion of the machine. The wiper plates have flat horizontal under surfaces forming a shearing bed 33 which cooperates with the knife 29 in a manner hereinafter, to be described to trim the surplus lining. The Wiper plates are so shaped that-whenthey are in closed positions, as-seen in=Fig. 8, their inner walls 34 form a continuous wiping.

4 surface conforming to the perimeter of the toe of the last. The inner walls 34, as herein illustrated, are substantially normal to the shearing bed 33 but need not necessarily be. The plates 30 are interchangeable with similar plates to be used on different size and style shoes. The plates 30 are secured by bolts 35 to the bottom of plates 36 which likewise pivot about the stud 31 and are guided in their movements by rollers 38 secured to the head 32. The plates 36, and consequently thewiper plates 30, derive pivotal motion from a slide. 40 which is reciprocated in a guideway 42 secured to the under surface of the head 32 by screws 43. Connecting the slide 40 to the plates 36 is a pair of push rods 44 which have formed on their rearward ends bifurcated lugs 46 pivota1- ly secured to the plates 36 by fulcrumpins 48. Depending from the rearward end of the slide 40 (shown in inverted position in Fig. 7) is a pair of lugs 50 through which the rods 44 freely slide. Compressed between the lugs 46 and 5t) and surrounding the" rods 44 are coil springs 52. downwardly asseen in Fig. 7, by means hereinaftertio b'e described, the springs 52 are compressed and the wiper plates 30' are pivoted inwardly fromthe positions shown in Fig. 7 to the positions shown in Fig. 8. The-slide 40 is normally urged forward (upward asseen in- Fig.- 7) by atension spring 54 connected to the head 32 to maintain' the wiper plates in open positions. Rearward motion to close the wipers is imparted to the slide 40 by a cam.56 which contacts a roller 58 carried on the bottomside of: the slide, the cam being shown in rest position in Fig; 7. The cam is rotated at the upper end of a shaft 60-which is coaxial with the main drive shaft 14 (Fig; 1=-) and derives its rotative movement therefrom by mechanism hereinafter to be described. Formed inthe slide:

40 is: a. slot 62. to permit it to slide past a nut 64 (Fig; 1 which secures. the cam 56 to the shaft 60. Themanner in which the wiper plates 30 cooperate with the other elements of: the machine to form the toe of'the'shoewill' be described hereinafter.

Mounted for reciprocation in the main frame 2: is-a carriage 7%), Figs. 3 and 4, which carries the trimming knife 29 and other operating elements toward the toe wiper 16-and the shearing bed 33. Extending outwardly from each side. of the carriage 7il'is a pair ofrollers 72.

which rotatein a pair of guideways '74. The. guideways extend'lengthwise of the machine parallel to the shearing becl 33 and are secured to the machine frame 2 by screws 76; Extending downwardly from the carriage, two on each side, are rollers '78 which bear against vertical faces 80 (Fig. 6) formed on the guideways 74 (see'Fig. 6.). Horizontal reciprocating motion is imparted. to the carriage; 70 by a connecting rod 82 whichipivots ona fulcrum 84 (Fig. 3) fixed in the-forward end of thegcarriage. At itsforward endv (Fig. l) the connecting rod 32 is pivotedona-pin 86'carried in a crank arm 88,which,isl eyed to the. main drive: shaft 14 androtates; therewith. On;

itsupper end, the pin 86 is journaled in a flywheel which is secured to the lower end of the aforementioned shaft 60.

As the clutch 12 makes a single revolution. the, carriage 701 is first. moved forward by means of the crank arm 88 and connecting rod 82 and then returned to its rearward position. Fig. 2 shows the flywheel 90 in its restpositionwithla brake 92 contacting its peripheral face; the flywheel begins to rotate, the brake is automatically released, by means new to be described, and thereafter as the carriage 7nears cornpletion of its return movement,the brakeagain engages the flywheel 90 to-bring the machine to a smooth even stop. The-brake; 9.2 is

carried'on a-lever 94 which is'pivoted" on a fulcrumpin 96 fixed in the machine frame. At its free end-the lever 9.4 carries alrolier 98: which is urged-into contact with the face of the flywheel 90 by means of a compression spring mounted onthe lever 94 and pressedagainst the machine; frame.

When the slide 40 is moved rearwardly, or:

The flywheel. S t has: forme'rl in 1 itsface a cam slot 102 so located and shaped that when the machine is at rest, Fig. 2, the roller 98 enters the slot permitting the brake to make contact with the flywheel. When the flywheel begins to rotate, the lever 94 is pivoted outwardly, disengaging the brake 92. It is returned into contact with the flywheel upon the completion of one revolution when the roller 98 reenters the slot 102.

The toe lifting plate 26 which moves the shoe upwardly into contact with the inner walls 34 of the toe wiper plates 30 to effect down wiping and form the toe of the shoe will now be described. The lifting plate is tongue shaped, Fig. 2, conforming generally to the shape of the toe of a shoe and is secured by means of screws 110 to a carrier 112, the forward end of which is pivoted in the main frame 2 on trunnions 114. Two bell crank levers 116 (Figs. 3 and 4) are mounted one on each side of the rearward end of the carrier 112. Pivotally connected to the lower arms of the bell crank levers are levers 118 (only one of which is seen in Fig. 3, and being identical, only one will be described herein). The lever 118 is pivoted on the frame of the machine on a fulcrum stud 120. On its forward end the lever 118 carries a roller 122, and above the roller is formed a lug 124 having a flat upper surface 126. The forward end of the lever 118 is held downwardly by means of a tension spring 127, with the roller 122 in contact with the upper surface of an inclined cam 128 which is secured directly to the carriage 70 by means of screws 130. The cam 128 is so shaped (see Fig. 3), that as the carriage 70 moves forward the roller 122 is raised, pivoting the lever 118 about its fulcrum stud 120 which pulls the rearward end of the carrier 112 downwardly, pivoting the same on the trunnions 114, causing the toe lifting plate 26 to be raised. This pivotal motion continues until the flat upper surface 126 of the lug 124 strikes an adjustable stop 134 (to be described in more detail hereinafter) on the carrier 112.

The trunnions 114, on which the carrier 112 pivots, are movable heightwise of the machine frame 2, each being carried in a trunnion block 136 of T-shape cross section (Fig. 4) which is slidable in a guideway 138 which forms a part of the machine frame and is seen best in Fig. 20. Forcing the trunnion block 136 downwardly in the guideway 138 is a compression spring 140 which bears against the upper surface of the block and the lower surface of a cover plate 142.

The stop 134 is one of a pair of stops adjustable heightwise of the carrier 112 in housings 143. The stops being similar one on each side of the carrier 112, only one will be described here. The lower portion of the stop 134 is rounded and its upper end carries a wedge-shaped projection 144. A compression spring 146 bears against the projection 144 and the bottom of the carrier plate 112 to urge the stop 134 upward. Engageable with the wedge surface of the projection 144 is an adjusting wedge 148 carried on the forward end of an arm 150 which is slidable lengthwise of the carrier 112 in a dovetail slot. The upper surface of the adjusting wedge 148 has scale markings 154 on it so that an operator may tell at a glance how far the adjusting wedge has moved into the housing 143 and thus the position of the stop 134. The arms 150, there being one for each of the stops 134, are joined at their rearward ends by a crossbar 156, Fig; 2, so as to be movable together. Threaded in the crossbar 156 is an adjusting screw 158 having a knurled wheel 160 which bears against the sides of a slot 162 formed in the rearward portion of the carrier plate 112. As the wheel 160 is rotated in a clockwise direction, the crossbar 156 is advanced, thereby causing the wedges 148 to force the adjustable stops 134 downwardly against the force of the compression spring 146.

The operation of the toe lifting plate 26 will now be described. The forward motion of the cams 128 on the carriage 70 pivot the levers 118 clockwise, Fig. 3, which draws the rearward end of the carrier 112 downward, the toe plate 26 moving upward between the toe wiper plates 30. When the flat surfaces 126 of the lugs 124 engage a the adjustable stops 134, additional lifting motion is imparted to the toe plate 26, the trunnions 114 and the trunnion blocks 136 yielding upwardly compressing the springs 140. The amount of upward movement of the toe lifting plate 26 and consequently the ultimate height of the shoe relative to the shearing bed 33 is thus controlled by the heightwise adjustment of the stops 134.

The trimming knife 29 and its operating mechanism will now be described. The trimming knife (see Figs. 3, 4 and 28) is carried by the carriage 70 and comprises a circular trimming cutter having a flat upper surface 170 (Fig. 20), and is secured by a nut 172 to the upper end,

of a shaft 174 journaled within a sleeve 176 in bearings 178. At its lower end, the shaft 174 carries a gear 180 engaging an idler gear 182 journaled in the bottom of the carriage 70. Meshing with the idler gear 182 is a third gear 184 which likewise is journaled in the carriage. The gear 184 engages a rack 186 (Fig. 4) secured by screws 188 to the lower portion of the machine frame 2. The rack extends lengthwise of the machine parallel to the guideways 74 so that as the carriage 70 is reciprocated, the knife 29 is caused to rotate. The sleeve 176, in which the knife shaft 174 rotates, is slidable heightwise of the carriage 70 and is adjustable relative thereto by means of a knurled hand wheel 190. The hand wheel is carried on the upper end of a shift 192 which has its lower end threaded into a pin 194 carried by the carriage 70. The hand wheel has a circumferential groove 196 in which a projection 198 on the sleeve 176 is engaged. A spring-biased plunger 200 which slides in the frame 70 contacts the lower periphery of the hand wheel 190 to prevent inadvertent rotation of the hand wheel 190 due to machine vibrations, etc. The construction of the aforementioned mechanism is such that as the hand wheel 190 is raised or lowered by rotation, the knife 29 is ad-. justed heightwise of the carriage, and since the carriage reciprocates in a path parallel to the shearing bed 33, the clearance between the knife and shearing bed is thus determined.

The side spreaders 18, the tip spreaders 22, the tip presser 24 and the toe stop 28 are all reciprocated by the carriage 70 but are movable heightwise relative to it toward and away from the shearing bed 33 on a carrier plate 210 (Figs. 3 and 4). The rearward end of the plate 210 is pivoted on the rearward end of the carriage 70 by means of trunnions 212 which are held secure by setscrews 214 in a pair of lugs 216 formed on the carriage. Each trunnion 212 passes through a vertically elongated slot 218 in the plate 210 and has a head formed on its outer end which engages the outer surface of the plate 210. Urging the carrier plate upward relative to the carriage is a pair of spring-biased plungers 220 slidable in bores in each side of the carriage and bearing on the under surface of the plate below the trunnion 212.

On the forward end of the plate 210 there is carried a pair of rollers 222, one roller on each side. Each of the rollers 222 engages one of two slotted cam tracks 224; which are identical and mounted on opposite sides of the machine frame, only one cam track being seen in Figs. 1

and 3, and thus described here in the singular. The cam track 224 has a horizontal portion A, an inclined portion B, and a second horizontal portion C. As the carriage 70 moves forward with the roller 222 in the horizontal,

portion A, the plate 210 moves in a straight horizontal path parallel to the shearing bed 33. When the roller 222 reaches the inclined part B of the cam the forward end of the plate 210 will be raised, the rearward protion pivoting on the trunnion 212, and 'when the roller 222 reaches the portion C, the then raised forward end of the plate 210 will again resume a straight horizontal motion.

The cam track 224 is supported by a pair of bell cranks 226 (Fig. l), eachof which pivots in the machine frame 2 on pins 228. The lower arms 230 of the bell cranks are joined by a connecting rod 232 so that the cranks will pivot in unison. Each of the bell cranks has formed thereon a lug 234 having a'fiat upper surface engageable with the under surface of the head 32 which engagement limitsthe heightwise position of the bell. cranks and consequent ly ofthe cam 224. Depending from the connecting rod 232 is an arm 236 on which is pivoted one end of a rod 240 by means of a bifurcated lug 241. The rod 240 slides through a block 242 which pivots on the upper end of a lever 244. Surrounding the rod 240 and compressed'between the block 242 and the lug 241 is a compression spring 248. The construction is such that, as thelever'244 is rotated in a clockwise direction, as seen in Fig. 1, by mechanism hereinafter to be described, the spring 248 is compressed and through the lever action of the connecting arm 232.and the bell cranks 2.26, the camtrack 224 is urged upwardly until the flat upper surfaces of lugs 234 contact'the head of themachine. The lower ends of each of the levers 244 (there being one on each side of the machine for each of the cam tracks 224) are secured by pins25't (Fig. to a transverse rod 252 which is rotatablein the frame so that the springs 248, and thus the cams 22 3, move in unison. This adjustment is made before a shoe is trimmed and will be explained in more. detailed hereinafter.

'In the normal course of operation of the machine the cam tracks 224 are caused to be depressed slightly, and the degree of force required to depress them is controlled by 'the amount of compression applied to the springs 248 by a hand operated mechanism seen best in Fig. 19. An eccentric cam 254 is keyed to a shaft 258 which is rotatable in one side of the machine frame. Also secured to the shaft 258 are a handwheel 260 and a notched wheel am. The notches in the wheel 262 are visibly numbered for the operators convenience and are engageable by a spring-biased detent'264 which is slidable in a housing'266 formed on the machine frame, the notched wheel and .detent cooperating to keep the eccentric'cam 254 in a selected position. Engageaole with the face of the eccentric cam 254 is the upper arm of a lever 268-which is pivoted on a stud 27% The lower end of the lever 268 engages a rounded surface on a lever 274 whichis connected to the transverse shaft 252. The construction of the mechanism is such that, as the eccentric cam 254 is moved to a selected position by turning the handwheel 260 and permitting the detent to enter one of the notches, both of the springs 248 are compressed an equal amount. Thus, the machine operator controls the pressure required to depress the cam tracks 224.

The side spreaders 13, the tip spreaders 22 and the pincers 20 cooperate ina manner to he explained more fully hereinafter to grip and tension the upper and the lining to assist the toe wiper plates 30 in pro-forming the toe and to spread the upper andliniug outwardly of the shoe, against the shearing bed 33, to be trimmed. The side spreaders 18 and the tip spreaders 22 are carried on plates 23% which are slidable toward and away from each otheronthe upper-surface of the pivoted piate 21% on each side of the longitudinal center line of the machine. The plates aresoarranged that the tip and side spreaders together form a wedge. Only one plate, one side spreader andone tip spreader are shown in Fig. 4, and they are herein'descrihed in the singular for convenience. Formed on the under surface of the plate 280 is a dovetail guide 282 (Fig. 16) which fits within a guideway 28% in the plate 21%. The guide and guideway are positioned diagcoal to the direction of movement of the carriage 7%} which is colinear with the center line of the machine. The guideway 284- contains a slot 235 (Figs. 13 and 14) and passing through the slot is a pin 2% (Figs. 4 and 16) fixed in the plate 280 and to which is attached a tension springZfiS connected at its forward endto apin 293 fixed in a plate 292 which is rigid with the carriage 7d. The plate 286 is'thereby normally urged forwardand inward toward ,the'longitudinal center line of the carriage 749011 the plate 210. Extending upward'from the surface of the plate-280 .is the side spreader 18whichis in theshape of anarrow rib positioned diagonal to thelongitudinal axis of the machine and has straight vertical walls v239 '(Fig. 4), substantially normal to the plate 230, a flat upper sur face 231 generaliy parallel to the plate, and .an inclined nose portion 293.

Slidable longitudinally on the upper surface of the plate justforward of the side spreader 18 is a slide 294 (Fig. 17) on the rearward end of which is formed the tip spreader 22. The tip spreader has a fiat upper surface 295 in the same plane as the upper surface 291 of the side spreader, see Fig. 16, and a downwardly sloping surface 2% constituting .part of its forward end. The tip spreader has a vertical Wall 297 (Fig. 4) parallel to the vertical walls 239 of the side spreader. The slide 294 moves lengthwise of the plate 280 on a dovetail guideway 298 (F 18) which is formed thereon. Extending downwardl a from the plate 294 is a pin 300 which enters a slot 3&3 in the guideway 289. Fitting in a bore in the piate 221i: in alinement with the slot 302 is a compression spring 3% which bears against the pin 3th) normally urging the siide 294 forwarduntil the pin 3% contacts the forward end of the slot.

During the trimming operation andfor a purposehereinafter to be explained the tip spreads 22 are movedrearwardly compressing the springs 302 until their rear vertical surfaces 366 contact the forward surfaces 308 of the side spreadcrs it whereupon the vertical walls 237 of the tip spreadcrs become contiguous with the outer vertical walls 2%? of the side spreader, as seen in Fig. 22.

Carried on the forward end of each of the plates .280 is a roller 31% which is in a position to contact an abutment 312 (Fig. 1) secured to the machine frame 2. After the carriage 7% has compieted part of its forward movement the rollers 31%) strike the abutment 312 thereby limiting furtherforward movement of the plates 280. As

' the carriage continues to advance the plates 28th begin moving outwardly away from each other at right angles to the direction of movement of the carriage, the guides 282 sliding in their guideways 284 extending the tension springs 288. The purpose for this movement will be explained in more detail hereinafter.

The toe stop 28 (seen best in Figs. 10 through 15) is mounted for sliding movement in the forward end of the piste 216 between the plates 23%). On the upper portion of the toe stop in alinement with the toe lifting plate 26 there .is formed a fiat surface 315 against which thelast and insole of the shoe are positioned (see Fig. 15), to locate thev shoe in the machine in proper positionrelative to the operating elements. The toe stop is cylindrical in cross section and is movable heightwise of the plate 210 in a sleeve 314 which is formed as an integral part of a slide 316. The slide 316 is of T-shape crosssection (see Figs. 11 and 12) and is slidable within a mating groove in the plate 216. On the lower end of the me stop is formed a lug 324} having a flat uppersurface engageabie with the lower surface of the slide 316. The lug 32% is bifurcated and has a pin 322 passing therethrough on which is pivoted a latch 324. The latch is fulcrumed on a stud 326 passing through a pair of depending ears 328 formed on thelower side of the slide 3?.6. A spring plunger 339 is slidable in a sleeve 332 which forms the rearward end of the latch 324 and bears against the lower surface of the slide 316. The plunger 330 causes the toe stop 28 to be forced upwardly in the sleeve 314 until the upper surface of the lug 320 contacts the lower surface of the slide 316 (Figs. 10 and 11). The.

forward end of latch 324 has a finger 336 formed thereon the purpose of which will be explained hereinafter;

Passing vertically through the slide 316 is a hole 338' formed on the head of the stop 340-and engages the under surfaceof the plate 210, the construction being such that.

attests stop 340 may be locked in any desired position length-g wise of-the slot 342. A spring-biased plunger 348 is slidable longitudinally within a bare in the slide 316, its forward end being engageable with the stop 340. The plunger 348 normally urges the slide 316 and consequentlythe toe stop rearwardly (Fig. 10) permitting the upper leather and lining of the shoe to be positioned by the operator between the toe wiper plates 30 and the toe stop 28, as seen in Fig. 15. Thereafter the shoe is pressed forward by the operator until the rear Wall of the hole 338 con tacts the adjustable stop 340, Fig. 15. Depending upon the location of the stop relative to the slot 342, the shoe will be in proper position to permit the Wipers 30 to downwipe the upper and lining when the toe lifting plate 26 begins to move the shoe upwardly.

The tip presser 24, the function of which will be described hereinafter, is carried in the plate 210 rearward of the toe stop 28. The tip presser is wedge-shaped (Figs. 4'and l3) and has a flat upper surface 349 and an arm 350 extending rearwardly. The arm is pivoted in the upper portion of a bifurcated cylinder 352, the lower end of which has a threaded portion extending through the plate 210 and secured in place by a nut 354. A compression spring 356 urges the toe stop 28 upwardly away from the plate 210 causing the arm 350 to pivot on a pin 351 fixed in the cylinder 352.

Cooperating with the side spreaders 18 and the tip spreaders 22 to grip the upper materials, tension them over the last and spread them outwardly of the shoe against the shearing bed 33 is a pair of pincers 20, seen best in Fig. 27. The pincers are pivotally secured by pins .362 to the rearward ends of a pair of bell-crank levers 360 and are urged toward each other by means of compression springs 364. The bell-crank levers 360 are pivoted in the head 32 of the machine on the lower ends of shafts 366 which pass vertically through the head 32. On the forward end of each bell-crank lever 360 is a roller 368 which is engageable'with the rearward end of a slide 370. An adjustable compression spring 372 (see Figs. 2 and (to be described in detail hereinafter) urges the rollers 368 forcibly against the slide 370. The slide 3 70 is of dovetail cross section (Fig. 5) and reciprocates within a guideway 371 which is carried in a bracket 374 forming an internal part of the machine frame. A roller 376 extends upwardly from the slide and contacts the periphery of a cam 378 which rotates on the shaft 60 with the aforementioned cam 56. The cam 378 rotates in a counterclockwise direction, when viewed in Fig. 27, and when it has rotated sufficiently to permit the roller 37 6 to entera recessed portion 379, the slide 370 is forced rearwardly by the spring 372 acting on the levers 360 permit-- ting them to pivot toward each other. This action causes the pincers 20 to move inwardly toward the side spreaders 18 and the tip spreaders 22 (Figs. 22 and 24) to grip the margin of the upper materials against them. It will be noted that the slide 370, like the slide 40, has an elongated slot 380 formed in it to permit it to move transversely of the shaft 60.

The spring 372 which pivots the pincers 20 will now be described. Referring to Figs. 2 and 5, it will be seen that the shafts 366, on which the bell-crank levers 360 are carried, pass upwardly through the head 32 of the machine. Aflixed, one to each of the shafts 366, are forwardly extending arms 382 and 384. Pivotally secured on the bottom of the arm 384, by means of a shaft 386, is a block 388 (Fig. 5). A similar block 390 is pivotally mounted on the arm 382. Threaded into the block 388 is a sleeve 391 pinned to a rod 392 on which is carried the abovementioned compression spring 372. The right-hand end ofthe rod 392 is rectangular in cross section, and slides oppositely threaded so that as the rod 392 is rotated by means of a hand wheel 398 the sleeves 391, 396 move tdward or away from each other thereby varying compression of the spring between them. v

The amount of compression applied to the spring 372 controls the amount of force with which the pincers 2 0 clamp the upper and lining and is varied according to the.

materials from which the shoe is made. To enable the operator to make accurately the adjustments in the compressive force as he works on shoes of different leathers,

there is provided a gage comprising a finger 400 secured to the top of the arm 384, and a disk 402 pinned to the rod 392 which registers with scale markings 404 on the finger 400. As the rod 392 is rotated the finger 400 moves with respect to the disk 402 to indicate on the scale the cornparative amount of compression. 1

The machine is set in operation by depressing a treadle 406 (Fig. l) which, by means of a treadle rod 408, pivots a bell-crank 410 about a stud 412 fixed in a bracket 414 which is part of the frame. The upper end of the bell-crank 410 is connected to a rod 416 which trips the single revolution clutch 12. In order to prevent the machine from being started when the operator .has his hands in a position between the toe wiper plates 30, a.

safety device is provided, comprising a cover plate 418 having lips 419 and which is mounted on a shaft 420 (Fig. 2). The shaft 420 is journaled in bearings 422 on the head of the machine and has a hand wheel 424 affixed to one of its ends to raise and lower the cover plate 418.

When the cover plate is moved to its downward position (Fig. 2), it lies over the toe wiper plates 30, the lips extending downward, to prevent access to the wipers and the associated mechanism. Also attached to the shaft 420 is an eccentric lever 426 which is connected by means of a rod 428 to a latch 430 (Fig. 1). The latch engages a tongueon the upper end of the bell crank 410 when thecover plate 418 is in its upward position, to. prevent the treadle 406 from being depressed and the machine started. When the cover plate 418 is lowered, the latch 430 is disengaged from the lever 410 and the clutch may be tripped.

As another safety feature of this machine, there is pro vided a cover plate 432 (Figs. 1, 3 and 6) which is pivoted advertently placing his hand in the machine.

The manner in which the machine operates will now be described. Initially the various above-mentioned adjustments are made by the operator in accordance with the size and shape of the shoes and the materials from which they are made. The wiper plates 30 are selected to conform to the shape of the toe. The heightwise position of the knife 29 is adjusted (Fig. 28) so that it will pass below the shearing bed 33 an amount just equal to the thickness of the upper leather U (Fig. 22) unless it is desired to skive the upper, in which case the knife is set closer to the shearing bed. The stops 134 are set, by turning thewheel (Fig. '3) to regulate the shoe height and thus the amount of lasting margin of lining L which will be wiped below the bottom of the insole I. The springs 372 and 248 are adjusted to the desired compression by turning wheels 398 and 260 (Figs. 5 and 19, respectively).

The springs 248 through the action of the cam tracks 224 control the amountof force by which the side spreaders 18 and tip spreaders 22 will press the upper U and the.

lining L against the shearing bed 33 (Fig. 22).. Greater" spring pressure will be used on shoes made of leather that,

is susceptible to pleating, such as calf, than on shoes made of thin suede which does not pleat as muchf The same is true in regard to the spring 272, since this springcontrols how firmly the stock is gripped between the pincersitl ndtheside. spre der (Ria -.24)- During he,

latterpart of the spreadingoperation, as the spreaders and pincer-s approachtheir limit of outward movement, as willherein after be explained, the upper U'andj lining L areifully pre-formed and stretched and'ofier sufficient re: sistanceto movement to slip gradually from between the pincersand spreaders. At that time, excessive spring pressure couldconceivab'ly'cause a light leather such as suede to be torn or damaged.

, Next, the position. of the toe stop 28 is adjustedby locating the stop 3401(Fig. so that the toe, above the insole I, when raised will just contact thewiper plates 30 (Fig. 21);

The operator then places theshoe in the machine by resting the insole I on the toe lifting plate. 26" and placing the, last and the tip of the insole against the flat surface 315 'ofjthjetoe stop 28 with the upper materials spread over the toe stop, as shown in Fig. 15. As stated above, th'espring plunger 348 normally biases thetoe stop 28 rearwardly (Fig, 10) This is to permit the upper and lining to pass between the toe stop and the toe wiper 16. It furthermore permits shoes of different sizes to be trimmed without-having to reset the stop 340 frequently. The. shoe is urged forward by the operator to the position determined by the stop 340 (Fig. after which the clutch is tripped. The wiper plates 30, under the action of the cam 56 (Fig. 7), are immediately closed about the toe above the insole I, the wiper surfaces 34 (Fig. 8) first contacting the shoe in the areav indicated by the letter a in Fig. 25. The carriage 70'has then begun its forward movement with the knife 29 rotating. The cam 128 (Fig. 3) causes the lever 118 to draw the rearward end of the carrier 112 downwardly, raising the toe lifter plate 26 from the position shown in Fig. 15 to the position shown in Fig. 21. During the initial forward movement of the carriage 70 the rollers 222 ride in the horizontal portion A (Fig. 3') of the cam track 224. and, upon reaching the inclined portion Bof the cam, the plate 210 begins to rise. Thereupon, the finger 336 of the latch 324 engages a notch in the plate 292 (Fig. 21) which, upon continued upward movement of the plate 210, causes the toe stop 28 to beretracted within the sleeve 314 in order that it does not strike the toe wipers or the other operating mechanism of the machine. As the carriage continues its forward motion the toe lifting plate 26 continuesto rise, and the surfaces" 34 of the plates 30 Wipe the upper and lining downwardly. When the flat upper surface 126 of the lug 124 (Fig. 3') contacts the-stop 134, the trunnion block 136 (Fig; is caused to yield upwardly. As the shoe contimes to move upwardly portions of the wiping surfaces 34 successively engage the areas indicated by letters b, c

and d in Fi'g. 25. Meanwhile, the tip spreaders 22 have moves-sufli'ciently forward forthe rollers 222 to enter the horizontal portion Cof'the cam track 224, the upward movement of' carriage plate 210 is discontinued and its motion again is horizontal. The frictional force of the tip spreaders 22 engaging the upper materials, pressing them against-the shearing bed 33, and ironing out any pleats formed therein is sufiicient to overcome the force of the spring 364 (Fig. 17). The tip spreaders 22 dwellfor-an instant just below the shearing block 3 3, pressing the stock against it, until the forward faces 308 of the forwardly moving side spreaders contact the rearward faces 306 of-the tip spreaders. Thereupon the vertical walls of the tip spreaders and of the side spreaders join to present a continuous flat surface as they move forward together; (Figs. 22 and 23). (Fig. 27) has-rotated sufiiciently to permit thepincers 29 to close inwardly; gripping the stock against the joined vertical walls-(Figs; 22 and 24).

Next, the rollers 310 on the plates 280 contact the abutment' 312 (Fig. 1) which limits the forward, movement At this time the cam 378- of ,the plates 280 and consequently the side spreaders anm the tip spreaders which are mounted thereon, However, 5 this action doesnot take place until the tip spreaders 22 have moved just far enough forward to be out'of frictional engagement with the, upper materials whereupon they are sprung forward by the springs 304 (Fig. 17) out of engagement with the side spreaders. The tip presser 24 assumes the position formerly occupied by the tip,

spreaders to press the stock against theshearing bed. The

carriage in the meantime is still continuing itsforward movement and the side spreaders 18 with the pincers 20 pressing the stock against their vertical faces aremoved outwardly against the force of the springs 288 (Fig. 4) and the spring. 372 (Fig. 2). 284 in the plate 210 cooperate with the guides 282 (Fig. 16) to wedge the plates 280 apart. When the side spreaders have reached the extent of their outward movement the knife 29 passes below the shearing bed (Fig. 26) severing the lining extending therebelow but leaving the upper untouched unless the knife has been set to. skive it.

It will be noted (Fig. 22) that the insole I of the shoe has been raised by the toe lifting plate 26 above the shear: ing bed, the action of the wiper plates 30 cooperating with the spreaders to pre-form the upper U and lining L over the toe, the margin of lining extending below the bottom of the insole being determined by the distance that the shoe is raised above the shearing bed.

After the machine has completed its forward trimming stroke the clutch 12 will have made one-half a revolution and during the second half of itsrevolutioneach of the operating elements will be returned to its starting-position,

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

1. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing alast, a toe wiper having a wiping surfaceconforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine. with said wiping surface engageable with the shoe above the last bottom,

means for spreading the unlasted margins of the upperand lining that extend below the last hottomoutwardly lining are formed to the shape of the last, and, trimming means movable past the shearing bed to sever portions ofv the outspread marginal material,

2; In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing: a last, a toe wiper comprising a pair of wiping plates.

pivotally mounted in the machine, each plate having a wiping surface and a flat surface substantially. normal thereto, the flat surfaces together forming a shearing bed, yieldable means operably connected to the wiping-plates;

for pivoting them from a first open inoperative-position,

with saidcontinuous Wiping surface engageable with the shoe above the last bottom, means for spreading the margins of the unlasted upper and lining that extend below the shoe bottom outwardly under tension away from the toe perimeter in contact with the shearing bed,

means for moving the shoe substantially normal to the plane of the shearing bed while in engagement'withsaidcontinuouswiping surface, whereby the upper and? lining are formed totheshape of the last, and trimming. means movable past the shearinghedto.- sever portions ofthe outspread marginal material.

3. In a. machine for trimmingsurplus lining from; the unlasted toe of a partially fabricated: shoezeontaining; a;

The diagonal guideways,

13 last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine with said wiping surface engageable with the shoe above the last bottom, means for moving the shoe substantially normal to the plane of the shearing bed in engagement with said wiping surface to form the upper and lining to the toe of the last and wipe the margins thereof below the last bottom, means for spreading the unlasted margins of the upper and lining that extend below the last bottom outwardly under tension away from the toe perimeter in contact with the shearing bed, and trimming means movable past the shearing bed to sever the outspread lining.

4. In a machine for trimming surplus lining from the unlasted toe of a partially fabricated shoe containing a last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine with said wiping surface engageable with the shoe above the last bottom, means for moving the shoe substantially normal to the plane of the shearing bed in engagement with said wiping surface to form the upper and lining to the toe of the last and wipe the margins thereof below the last bottom, adjusting means associated with said last-named means to vary the amount of shoe movement relative to the wiping surface whereby the amount of upper and lining wiped below the last bottom may be varied, means for spreading the unlasted margins of the upper and lining that extend below the last bottom outwardly under tension away from the toe perimeter in contact with the shearing bed, and trimming means movable past the shearing bed to sever the outspread lining.

' 5. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine with said wiping surface engageable with the shoe above the last bottom, means for spreading the margins of the unlasted upper and lining that extend below the last bottom outwardly under tension away from the toe perimeter in contact with the shearing bed, means for moving the shoe substantially normal to the plane of the shearing bed in engagement with said wiping surface to form the upper and lining to the shape of the last comprising a member engageable with the shoe and adjustable actuating means for moving said member whereby the extent of movement of the shoe relative to said wiping surface may be varied, and trimming means movable past the shearing bed to sever portions of the outspread marginal material.

6. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in a machine with said wiping surface engageable with the shoe above the last bottom comprising a toe stop having a surface engageable with the toe of the last adjacent the last bottom, means for adjusting the position of the toe stop relative to the wiping surface to accommodate shoes of different sizes, means for spreading the margins of the unlasted upper and lining that extend below the last bottom outwardly under tension away from the toe perimeter in contact with theshearing bed, means for moving the shoe substantially normal to the plane of the shearing bed while in engagement with said wiping surface whereby the upper and lining are formed to the shape of the last, and trimming means movable past the shearing bed to sever portions of the outspread marginal material.

7. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in a machine with said wiping surface engageable with the shoe above the last bottom comprising a toe shop having a surface engageable with the toe of the last adjacent the last bottom, means for adjusting the position of the toe stop relative to the wiping surface to accommodate shoes of different sizes, means for spreading the margins of the unlasted upper and lining that extend below the last bottom outwardly under tension away from the toe perimeter in contact with the shearing bed, means for moving the shoe substantially normal to the plane of the shearing bed while in engagement with said wiping surface whereby the upper and lining are formed to the shape of the last, means for withdrawing the toe stop from engagement with the last after the shoe has begun its movement, and trimming means movable past the shearing bed to sever portions of the outspread marginal material.

8. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a toe wiper, having a wiping surface conforming to the perimeter of the toe of the last, and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine with said wiping surface engageable with the shoe above the last bottom, a pair of spreading means engageable with the margins of the upper and lining that extend below the last bottom, each spreading means comprising a spreading element and a yieldable pincer cooperating therewith to grip said margins, resilient means urging both spreading elements toward the shearing bed, means for moving each spreading element and its associated pincer away from each other to spread the margins outwardly under tension in contact with the shearing bed, means for moving the shoe substantially normal to the plane of the shearing bed while in engagement with said wiping surface and with the margins outspread under tension, whereby the upper and lining are formed to the shape of the last, and trimming means movable past the shearing bed to sever portions of the outspread marginal material.

9. In a machine for trimming surplus material from' the unlasted toe of a partially fabricated shoe containing a last, a toe wiper having a wiping surface conforming to the perimeter of the toe of the last, and a surface substantially normal thereto forming a shearing bed, means for positioning the shoe in the machine with said wiping surface engageable with the shoe above the last bottom, a pair of spreading means engageable with the margins of the upper and lining that extend below the last bottom, each spreading means comprising a tip spreading element and a side spreading element, a movable plate mounting the spreading elements, and a yieldable pincer cooperating with the spreading elements to grip said margins, means for urging both plates toward the shearing beds to press the margins thereagainst, means for moving the plates with their associated spreading elements and pincers away from each other to spread the margins outwardly under tension away from the toe perimeter in contact with the shearing bed, means for moving the shoe substantially normal to the plane of the shearing bed while in engagement with said wiping surface and with the margins outspread under tension whereby the upper and lining are formed to the shape of the last, and trimming means movable past the shearing bed to sever portions of the outspread marginal material.

10. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a main frame, a shearing bed mounted on the frame, a carriage guided in the frame for movement past the shearing bed parallel thereto, a carrier .plate having one end pivoted on the carriage,means mounted on .the carrier platefor spreading the unlasted margins (if the .upper and "lining outwardly of the toe perimeterin contact withthe shearing bed under tension, means mounted on the frame for pivoting the .carrier plate toward the shearing bed transversely of thepath of movement of the carriage whereby the outspread margins are forcibly urged against theshearing .bed, and trimming means carried by the carriage to sever the outspread margins.

11. In a machine for trimming surplus material from the unlasted toe of a-partially fabricated shoe containing a last, a mainframe, a shearing bed mounted on the'frame, atcarriage guidedin the frame for movement past the shearing .bed parallel thereto, a carrier plate having one 'end pivoted on the carriage, means mounted on the carrier .plate for spreading the unlasted margins of the upper and.lining outwardly of the toe perimeter in contact with the.shearing bed under tension, means mounted on the frame for pivoting the carrier plate toward the shearing bed transversely of the path of movement of .the carriage whereby the outspread margins are forcibly urgedagainst the shearing bed, said lastnamed means comprising a cam track mounted on the main frame engageable with a cam .follower on the carrier plate, and trimming means carried by the carriage to sever the outspread margins.

12. In a machine 'for trimming surplus material from the unlasted toe of. a partially fabricated shoe containing a last, a main frame, ashearing bed mounted on the frame, a carriage guided in the frame for movement past the shearing bed parallel thereto, a carrier plate having one end pivoted on thecarriage,.means mounted on the carrier .plate forspreading the unlasted .margins of the upper and liningoutwardly .of the toe perimeter in contact with theshearing bed under tension, means mounted on the frame for pivoting the carrier plate toward the shearing bed transversely of the path of movement of thecarriage whereby the outspread margins are forcibly urged against the shearing bed, said lastnamed means comprising a cam track mounted on the main frame engageable with a cam follower on the carrier plate and an adjustable resilient member supporting the cam track whereby the force with which the margins are urged against-the shearing bed maybe varied, and trimming means carried by the carriage to sever the outspread margins.

13. In a machine for operating on the unlasted toe of a partially fabricated: shoe containing a last, a toe-forming member comprising .a pair .of wiping plates, 2. pin secured in the machine .on which pin the .plates are mounted for pivotal movement, .each plate having a curved wiping surface substantially parallel tosaid pin and a flat surface substantially normal thereto, the fiat surfaces together forming ashearing bed against which surplus marginal portionsof the unlasted toe are :spread in order to be trimmed, and yieldable means connected to the wiping plates for pivoting them in said pin from a first open inoperative position to aisecond closed operative position wherein the wiping surfaces move toward each other to form a continuous wiping surface conforming to the perimeter'ofzthe-toe of the last against which continuous surface the :shoe is moved to shape the toe.

l4. In a'machin'e for trimming surplus material from theunlasted toe of a partially fabricatedshoe containing a last, a shearing bed, trimming means movable relative thereto, a pair of spreading means engageable with the margins of the'upper and lining that extend below the last bottom, each spreading means comprising a spreading element'anda yieldable pincer cooperating therewithto grip said margins, resilientmmeans urging the spreading elements toward the shearing bed, and means for moving the spreading elements @and their associated pincersawayfrom each other to spread .the'

15 margins outwardly under tension in contact with the shearing 'bed.

'15. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, .a shearing bed, trimming means movable relative thereto, a pair of spreading means engageable with the marginsof the upper and lining that extend below the last'bottom, each spreading means comprising a spreading element and a yieldable pincer cooperating therewith togrip sai'd margins, resilient means urging the spreading elements toward the shearing bed to press the margins thereagainst, means for moving the spreading elements and their associated pincers away from each other .to spread the margins outwardly under tension in contact with the shearing bed, and an adjusting member associated with said resilient means to vary the force with which the spreading elements press the margins against the shearing bed.

'16. In a machine for trimming surplus material from the unlasted toe of a partially fabricated shoe containing a last, a shearing bed, trimming means movable relative thereto, .a pair of spreading means engageable with the marginsof the upper and lining that extend below'the' last bottom, each spreading means comprising a spreading element and a yieldable pincer cooperating therewith to grip said margins, means for moving the spreading elements 'anditheir associated pincers away from each other to spread the margins outwardly of the shearing bed under tension, and an adjustable resilient member associated with the pincers to vary the force with which the margins are'gripped between th pincers and the spreading elements.

17. In a machine for trimming surplus unlasted marginal toe material extending below the bottom of a partially'fabricated shoe, a shearing bed, trimming means movable in a pathparallel to the plane of the shearing bed,'means for positioning the'shoe in the machine with the marginal material arranged transversely of said plane, means for spreading said-marginal material outwardly of the toeperimeter in contact with the shearing bed comprising a pair of plates each movable on one side of the longitudinal center line of the shoe, each plate having a side spreading element fixed thereto and a tip spreading element slidable thereon, the spreading elements on each plate having parallel sides substantially normal to the plate and upper surfaces parallel to the plate,the plates being arranged relative toeach other such that thespreading elements form a wedge, means for moving the plates lengthwise of the shoe in advance of the trimming-means with the tip and side spreading elements in engagement with the marginal material, and means for moving the plates away from each other widthwise of the shoe after said plates'have completed their lengthwise movement.

18. in a-machine for trimming surplus unlasted'marginal toe-material extending below the bottom of a partially fabricated shoe, a shearing bed, trimming means 1 movable in -a path parallel to the plane of the shearing bed,=means for positioning the shoe in the machine withthe marginal material arranged transversely of said plane, means for spreading said marginal material outwardly of the toeperimeter in contact with the shearing bed comprising apair of plates each movable on one side of the longitudinal center line of the shoe, each plate havingaa side spreading element fixed thereto and a tip spreading element' slidable thereon, the spreading elements on each plate having parallel sides substantially normal to the plateand upper surfaces parallel to the plate, the plates being arranged relative to each other such that the spreading elements form a wedge, means for moving the plates lengthwise of the shoe in advance of the trimming means withithe tip :and side spreading elements in engagement with the marginal material, means for moving the plates away fromeach other widthwise of the shoe afterqsaid platesuhave completed their lengthwise movement,rand adjustable resilient means for urging the .plates toward thevshea'ringlbedto vary the force with which the marginal material is pressed against the shearing bed.

17 19. In a machine for trimming surplus unlasted marginal toe material extending below the bottom of a partially fabricated shoe, a shearing bed, trimming means movable in a path parallel to the plane of the shearing bed, means for positioning the shoe in the machine with the marginal material arranged transversely of said plane, means for spreading said marginal material outwardly of the toe perimeter in contact with the shearing bed comprising a pair of plates each movable on one side of the longitudinal center line of the shoe, each plate having a side spreading element fixed thereto and a tip spreading element slidable thereon, the spreading elements on each plate having parallel sides substantially normal to the plate and upper surfaces parallel to the plate, the plates being arranged relative to each other such that the spreading elements form a wedge, means for moving the plates lengthwise of the shoe in advance of the trimming means with the tip and side spreading elements in engagement with the marginal material, a pair of pincers each of which cooperates with the side spreading element on one plate to grip the marginal material, and means for moving the plates and their associated pincers away from each other widthwise of the shoe whereby the marginal material is spread under tension.

20. In a machine for trimming surplus unlasted marginal toe material extending below the bottom of a partially fabricated shoe, a shearing bed, trimming means movable in a path parallel to the plane of the shearing bed, means for positioning the shoe in the machine with the marginal material arranged transversely of said plane, means for spreading said marginal material outwardly of the toe perimeter in contact with the shearing bed comprising a pair of plates each movable on one side of the longitudinal center line of the shoe, each plate having a side spreading element fixed thereto and a tip spreading element slidable thereon, the spreading elements on each plate having parallel sides substantially normal to the plate and upper surfaces parallel to the plate, the plates being arranged relative to each other such that the spreading elements form a wedge, means for moving the plates lengthwise of the shoe in advance of the trimming means with the tip and side spreading elements in engagement with the marginal material, a pair of pincers each of which cooperates with the side spreading element on one plate to grip the marginal material, an adjustable member associated with the pincers to vary the force with which the marginal material is gripped, and means for moving the plates and their associated pincers away from each other widthwise of the shoe whereby the marginal material is spread under tension.

21'. In a machine for trimming surplus unlasted marginal toe material extending below the bottom of a partially fabricated shoe, a shearing bed, trimming means movable in a path parallel to the plane of the shearing bed, means for positioning the shoe in the machine with the marginal material arranged transversely of said plane, means for spreading said marginal material outwardly of the toe perimeter in contact with the shearing bed comprising a pair of plates each movable on one side of the longitudinal center line of the shoe, each plate having a side spreading element fixed thereto and a tip spreading element slidable thereon, the spreading elements on each plate having parallel sides substantially normal to the plate and upper surfaces parallel to the plate, the plates being arranged relative to each other such that the spreading elements form a wedge, means for moving the plates lengthwise of the shoe in advance of the trimming means with the tip and side spreading elements in engagement with the marginal material, means for moving the plates away from each other widthwise of the shoe after said plates have completed their lengthwise movement, a resilient member urging each tip spreader away from its associated side spreader out of contact with the marginal material at the tip of the shoe after the plates have completed their lengthwise movement, and a tip presser for urging, against the shearing bed, the portion of the marginal material formerly engaged by the tip Spreaders.

No references cited.

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