US2750607A - Sole channeling and lip setting machines - Google Patents

Description

June 19, 1956 A. s. CLARK 2,750,607

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 7 Sheets-Sheet 1 June 19, 1956 s CLARK 2,750,607

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 7 Sheets-Sheet 2 Z553 F. 3 j 32, 282/ 93 60 155 /6 I I -P/J6 M E 3 [nuen for s 03 Alfred 5. czar/f June 19, 1956 A. s. CLARK 2,750,607

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 7 Sheets-Sheet 3 June 19, 1956 A. s. CLARK I 2,750,607

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 7 Sheets-Sheet 4 lnven tor Alfred 5. Clark June 19, 1956 A, s, CLARK 2,750,607

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 7 Sheets-SheetS Alf/ e 6. czar/f June 19, 1956 A. s. CLARK SOLE CHANNELING AND LIP SETTING MACHINES 7 Sheets-Sheet 6 Filed Feb. 14, 1955 W O .1! I

[17 0e 27 tar Ahred 5 Clark June 19, 1956 A. s. CLARK 2,

SOLE CHANNELING AND LIP SETTING MACHINES Filed Feb. 14, 1955 "r Sheets-Sheet v Inventor Alfred G Cfar'k United States Patent SfiLE CHANNELING AND LIP SETTING MACHINES Alfred (Hark, Beverly, Mass., assignor to United Shoe Machinery Corporation, Fleming'ton, N. J., a corporation of New Jersey Application February 14, 1955, Serial No. 487,748

3 Claims. (Cl. l2--18.7)

This invention relates to machines for operating upon shoe soles and is herein illustrated and described as em bodied in a channeling and lip setting machine of the type disclosed in United States Letters Patent No. 2,510,203, granted June 6, 1950, on the application of Frederic E. Bertrand. The machine disclosed herein, like that disclosed in said Letters Patent, is provided with a pair of channeling knives which form and partially raise channel lips upon the surface of an insole. It is provided also with a device for pressing these lips together to form a sewing rib, the material from which the lips are formed having previously been coated with cement to cause the lips to adhere together to form the rib. Inasmuch as the outline of a sole is curved, the machine disclosed herein, like that disclosed in said Letters Patent, is provided also with such an arrangement of the work engaging members as to avoid interference with the feeding of the sole by reason of such curvature.

Certain of the novel features of the machine illustrated herein enable it to cut channel lips and to form these channel lips into a sewing rib which extends all the way around the margin of an insole. While many types of shoes take insoles having sewing ribs extending around the shank and forepart only, shoes having sewed heel seats require insoles on which the sewing ribs extend continuously all the way around the margin of the insole, including the heel portion as well as the shank and forepart. Such a shoe is disclosed in United States Letters Patent No. 1,376,387, granted April 26, 1921, upon the application of Matthias Brock. Hitherto two separate machines have been used in the manufacture of insoles for sewed heel seat work, one machine for cutting the channel lips and another for forming the lips into a continuous sewing rib. The illustrated machine is adapted to operate on insoles destined for sewed heel seat work as well as upon insoles destined for ordinary work.

The present invention consists in the novel features hereinafter described, reference being had to the accompanying drawings, which illustrate one embodiment of the same, selected for purposes of illustration, and the said invention is fully disclosed in the following description and pointed out in the accompanying claims.

In the accompanying drawings,

Fig. 1 is a left side elevation of the work-engaging instrumentalities of a machine embodying the invention;

Fig. 2 is a sectional view taken on the line IIII of Fig. 1; v

Fig. 3 is a sectional view taken on the line III-III of Fig. 2;

Fig. 4 is a left side elevation of the mechanism for operating the feed foot of the illustrated machine;

Fig. 5 is a rear elevation of the mechanism for gripping together the channel lips to form a sewing rib;

Fig. 6 is a left side elevation, partly diagrammatic, of the work table and its supporting mechanism;

Fig. 7 is a large scale front elevation of the operating instrumentalities in engagement with a work piece;

2,750,607 Patented June 19, 195.6

Fig. 8 is a sectional plan view taken on the line- VIII-VIII of Fig. 7, showing the formation of a continuous sewing rib for sewed heel seat work;

Fig. 9 is a left side elevation, partly in section on the line IX--lX of Fig. 8, of parts shown in Figs. 7 and 8'.

Fig. 10 is a left side elevation, partly in section, illustrating the operation of certain parts as the forming of a sewing rib on a sewed heel seat sole nears completion;

Fig. 11 is a front elevation showing the operation of certain parts as the forming of a sewing rib on a sewed heel seat sole nears completion;

Fig. 12 is an angular view of a sole having a continuous sewing rib for sewed heel seat work; and

Fig. 13 is a diagram illustrating the orbital path of the feed foot.

The work-engaging instrumentalities of the illustrated machine comprise a freely rotatable work table 20 (Figs. 1 and 2) upon which a work piece W in the form of an insole is intermittently advanced while in engagement with a pair of outer and inner channeling knives 22 and 24. These channeling knives serve to cut and also partially to raise a pair of channel lips from the surface of the insole, which lips are further raised and pressed together by a pair of gripper jaws 26 and 28 (Fig. 5), to form a sewing rib R (Figs. 7 to 12 inclusive). In order to cause the channel lips to adhere together to form the rib R,-

the portion of the surface of the sole from which these lips are cut has previously been coated with cement. A third knife 30 (Figs. 2, 7, 8 and 9), hereinafter termed a trimming or lip reducing knife, trims the outer channel lip to a uniform width as the lip is being raised, and a chip deflector 31 turns aside the resulting chip. To enable the machine to operate most advantageously upon insoles destined for shoes having sewed heel seats, in which the sewing rib R is not terminated at the heel breast line but extends around the entire margin of the insole, the machine is provided also with a rib depresser 32 and a rib guide and support 34, the constructions and functions of which will later be explained. The heightwise positions of the work-engaging members above mentioned, except the work table 20 and the rib guide 34, in relation to the upper surface of the work piece W, are determined by a presser gage 36 which rides upon the upper surface of the Work piece. The feeding of the work piece is effected by a toothed feed foot 38 while an edge gage 40 guides the work piece in its progress past the knives 22 and 24. The edge gage 40 of the illustrated machine is similar to the corresponding member of the machine disclosed in Letters Patent No. 2,510,208 above mentioned.

The supporting structure of the illustrated machine comprises a frame 42.

The feed foot 38 (Figs. 4, 8, 9 and 10), which feeds the sole W step by step, is arranged to engage the sole on one side only of a prospective sewing rib R (see also Fig. 12) to avoid crushing the leading end of a continuous rib at the completion of the operation. Although the illustrated feed foot is shown as engaging the sole within the prospective rib, it may be desirable in some cases to have it engage outside the prospective rib. This off-center feed foot 38 is mounted upon the lower end of a rod 44 (Fig. 4) the upper portion of which slidably engages a bearing 45 and the mid-portion of which telescopes within a sleeve 47. The lower portion of the sleeve 47 slides within a bearing 46 and the lower portion of the rod 44 (which extends below the sleeve 47) slides within a bearing 48 integrally connected to the bearing 46 by a yoke 50. A compression spring 51 normally maintains the telescoping rod 44 down and the sleeve 47 upas far as permitted by stops and yields to limit the downward pressure exerted by the feed foot 38 upon a work piece,

The construction and arrangement of the rod 44, bearing 45, sleeve 47, spring 51, and the stops are not described here in detail, but will readily be understood upon reference to United States Letters Patent No. 984,773, granted February 21, 1911, upon the application of William C. Meyer.

The horizontal component of movement of the feed foot 38 back and forth in the direction of feed is provided by an eccentric 52 which constitutes the end portion of a driven main shaft 54 and rotatably engages a bearing block 56 mounted in the yoke 51? adjacent to the lower bearing 48. The up-and-down component is derived from a crank arm or rocker arm 58 extending from a rockshaft 6t and having a pivotal or trunnion connection 61 with the bearing 45. The oscillatory motion of the rockshaft 6@ is obtained from the main shaft 54 by a toggle linkage comprising an eccentric 62 secured on the shaft 54 and driving a connecting rod 64 which is pivotally connected by an eccentric stud 66 to a bracket 68 pivotally mounted on a stationary fulcrum pin 711. The eccentric 62 can be secured to the shaft 54 in any desired position of angular adjustment about the axis of the shaft. The eccentric stud 66 can be turned to effect an adjustment between the rod 64 and the bracket 68. The bracket 63, through a pin 72, a toggle link 74 and a pin 76, rocks a crank arm or rocker arm 78 extending from the rockshaft 6i). In the mechanism just described, the members 68 and 74 constitute a pair of toggle links having their adjacent ends pivotally connected together by the pin 72; the fulcrum pin '70 constitutes a pivotal support for the remote end of the member 68; and the pin 76 constitutes a pivotal connection between the remote end of the link 774 and the rocker arm '78. This eccentric-driven toggle linkage provides an up-and-down component which, when compounded with the horizontal component, insures a resultant orbital path of the feed foot 38 having the desirable characteristics appearing in Fig. 13. It also permits the machine to be driven more silently and faster than would be possible with the corresponding cam mechanisms hitherto in use and, because the machine can be driven at high speed, the feed stroke can be made relatively short without unduly slowing the operation, a short feed stroke being desirable for work on soles having pointed toes.

The feed foot 38 can be adjusted relatively to the presser gage 36 along the path of feed. To this end the bearing block 56 (Figs. 1 and 6) is slidable for horizontal adjustment in a guide slot formed in the yoke 50. Ex tending integrally from the bearing block 56 and slidably through a bushing $311 is a stem 82 having a threaded outer end portion. The bushing 80 is threaded through a plate 84 which bridges the open end of said guide slot and which is rigidly secured to the yoke 51 The outer end of the bushing 81! has a hexagonal head by which it can be turned and the inner end abuts against the bearing block 56. A. nut 86 on the threaded outer end portion of the stem 52 draws the bearing block 56 tightly against the abutting end of the bushing 81 and thus holds the bearing block in a position of adjustment determined by the bushing. A look nut 88 holds the nut 86 against undesired turning, and a set screw 89 (Fig. 1) holds the bushing 81) against undesired turning. Secured on the outer end portion of the eccentric 52 by a clamping screw 90 is a split retaining collar 92.

The channeling knives 22 and 24, the trimming knife 30, the chip deflector 31, the grippers 26 and 28, the rib depresser 32 and the presser gage 36 are all mounted indirectly upon a slide 94 (Figs. 1 and 2) which is positioned over the work table 20 and has tapered edges for dovetail engagement with a guideway in which it can slide up and down. This guideway is formed by a finished surface on the frame 42, a gib 96 and an undercut portion 98 of the frame. The tightness of the slide in its guideway is adjusted by screws 1% threaded through a flange on the frame 42 and having their ends bearing against 4- the edge of the gib 96. After such adjustment of the gib has been made, the gib is clamped to the frame 42 by screws 102.

The slide 94 is urged down by a spring 1114 (Fig. 2) housed in a bore in the slide and acting upon a hollow plunger 106 slidable in said bore. The plunger 106 bears. up against the end of a screw 108 threaded through a.

bracket 110 which is clamped by screws 112 upon the block 98. The compressive force of the spring 104 is adjusted by turning the screw 198. Downward movemerit of the slide 94 under the influence of the spring 104 is limited, in the absence of a work piece, by a stop screw 114 threaded through a lug 116 on the slide and bearing against a stationary block 118 clamped to the undercut frame portion 98 by a screw 119.

Secured in a desired position of heightwise adjustment upon the slide 94 by clamping screws 120 is a carrier block 122 (Figs. 1, 2 and 3), said clamping screws being threaded in the slide and extending through clearance holes in the carrier block. A screw 124 threaded through a lug 126 on the slide 94 and bearing against a lug 128 on the carrier block 122 facilitates heightwise adjustment of the carrier block. A key 129 (Fig. 1) on the slide 94, engaging a keyway in the carrier block 122, coopcrates with the clamping screws 120 to maintain the carrier block in a predetermined relation to the slide.

The presser gage 36 is secured to the carrier block 122 by a clamping screw 130 (Figs. 1, 2 and 3) threaded in the carrier block 122 and acting through a clamping plate 132. Heightwise adjustment of the presser gage 36 is effected by loosening the clamping screw 131) and then turning an adjusting screw 134 which has its lower end portion threaded in a split lateral extension 136 of the presser gage. A binding screw 138 clamps the split lateral extension 136 around the screw 134 to maintain the adjustment. Heightwise movement of the screw 134 relative to the carrier block 122 is prevented by a collar 140 pinned to the shank of the screw and having its upper and lower end faces engaging lugs 142 and 144 extending from the carrier block. A spring 146 surrounding the upper portion of the shank of the screw 134 and interposed between the head of the screw and the upper lug 142 takes up backlash.

The outer or edge channeling knife 22 (Fig. 2), commonly termed the lip knife, has a horizontal dovetail shank which is mounted for adjustment transverse to the direction of feed in a split lower portion of a block 148. A binding screw 150 draws the split portion of the block 148 together to maintain the adjustment of the knife 22. The upper portion of the block 148, which also is split, engages a dovetail 152 on a block 154 for horizontal adjustment in the direction of feed, and a binding screw 156 in the block 148 maintains the adjustment. For convenience in restoring the block 148 to a previously adjusted position a bracket 158 (see also Fig. 9), secured at its lower portion to the block 148 by a clamping screw 160, has threaded through its upper portion a screw 162 which is held in adjusted position by a lock nut 164 and which has an end engageablewith an end face of the block 154. The upper portion of the block 154 is split (see also Fig. 3) and shaped to engage a dovetail 166 extending from the carrier block 122 for heightwise adjustment of the block 154. A binding screw 168 in the block 154 maintains the heightwise adjustment of the block 154. For convenience in adjusting the block 154 and in restoring it to a previously adjusted heightwise position, this block has a bevel on its upper end which is engaged by a frusto-conical end of a screw 170 threaded horizontally through the carrier block 122, the opposite end of the screw 170 being easily accessible to the operator for varying the adjustment.

The inner channeling knife 24 (Figs. 1 and 2), commonly termed the channeling knife, has a horizontal dovetail shank which is mounted for adjustment transverse to the direction of feed in a split lower portion of a block 172. A binding screw 174 draws the split portion of the block 172 together to maintain the adjustment of the knife 24. The block 172 is supported for heightwise adjustment on a dovetail 176 depending from another block 178. A binding screw 180 passing through one of a pair of spaced ears 182 on the block 172 and threaded into the other ear serves, when tightened, to clamp the block 172 on the depending dovetail 176 in a desired position of heightwise adjustment. As shown in Fig. 2, the depending dovetail 176 has an arcuate recess to enable it to clear the screw 180 and thus provide an adequate range of heightwise adjustment of the block 172. For convenience in adjusting the block 172 and in restoring it to a previously adjusted heightwise position, a screw 184 threaded down through a split lug 186 extending from the block 178 has its lower end engageable with the upper surface of the block 172. A binding screw 188 tightens the split lug 186 to hold the screw 184 in any desired position of adjustment. The block 178 has a split upper portion in which is formed a dovetail slot engaging a dovetail depending from the carrier block 122 for adjustment of the block 17 8 in the direction of feed of the work. A binding screw 190 clamps the split upper portion of the block 178 to the carrier block 122. For convenience in adjusting the block 178 and in restoring it to a previously adjusted position on the carrier block 122, the block 178 has threaded therethrough a screw 192 held in adjusted position by a lock nut 194 and having an end engageable with the presser gage 36.

It is evident from the foregoing description that each of the channeling knives 22 and 24 can be adjusted independently of the others in three directions, each direction being normal to the other two, and that any one of these three adjustments can be made without disturbing the other two. The three directions are as follows: heightwise, along the path of feed, and transverse to the path of feed.

The outside gripper jaw 26 (Fig. 5) is integral with a block 196 and is connected thereto by a shank 198. The jaw 26 extends down from the shank 198 and has an operable face for engaging the partially upturned outer channel lip. The block 196 is in tongue-and-groove engagement with a block 200 to provide for its adjustment transversely to the direction of feed of the work, being secured in adjusted position on the block 200 by a clamping screw 202 threaded into the block 196 and extending through a slot in the block 200. The block 200 has a tongueand-groove connection with a block 204 to enable the block 200 to be adjusted parallel to the direction of feed of the work, the block 200 being secured in its adjusted position on the block 204 by a clamping screw 206. Integral with and extending from the block 204 are a pair of spaced ears 208 which are pivotally mounted on a pin 210.

The inside gripper jaw 28 (Figs. 1 and 5) has a workengaging face opposed to the work-engaging face of the jaw 26. The jaw 28 is integrally connected to a block 212 by a shank 214 similar to the shank 198. The block 212 has a tongue-and-groove engagement with a block 216 to enable the gripper jaw 28 to be adjusted transversely of the path of feed of the work. A clamping screw 218 secures the block 212 in adjusted position on the block 216. The block 216 has a tongue-and-groove engagement with a block 220 to enable the clamping jaw 28 to be adjusted parallel to the path of feed of the work. A clamping screw 222 maintains the block 216 in adjusted position on the block 220. The block 220 has a pair of ears 224 which are pivotally mounted on the pin 210.

The lower end of the presser gage 36 bears upon that portion of the work piece W which is just about to be formed into channel lips by the knives 22 and 24, and the gripper jaws 26 and 28 operate upon the channel lips close to the locality at which they have been cut and partially raised by the knives. The spacing, in the direction of feed of the work, between the presser gage, the knives and the gripper jaws is as close as considerations of reasonable clearance permit.

The pin 210 is secured between a pair of ears 226 depending from a block 228 on the upper portion of which is formed a dovetail 230 engaging a slot formed in the lower end of the slide 94. The lower portion of the slide 94 is split to enable a clamping screw 232 to clamp the dovetail 230 to the slide.

The mechanism for operating the gripper jaws 26 and 28 (Figs. 5 and 1) includes a pair of pins 234 and 236 which extend respectively from the blocks 204 and 220 in a direction parallel to the path of feed of the work. A tension spring 238 has its ends anchored to the pins 234 and 236 to urge the gripper jaws 26 and 28 apart. Rotatably mounted on the pins 234 and 236 respectively are antifriction rolls 240 and 242, the blocks 204 and 220 being recessed to accommodate the rolls. A plunger block 244 has two separated depending portions 246 and 248 adapted periodically to bear down upon the rolls 240 and 242 and thus close the grippers 26 and 28 with positive pressure upon the partially raised channel lips to cause the lips to adhere together to form the upstanding rib R. The spring 238 holds the rolls 240 and 242 up against the depending portions 246 and 248. The depending portion 246 has an under surface which engages the roll 240. The depending portion 248 has formed in its under surface a groove 250 which accommodates the roll 242 and which also insures that the block 228, which carries the gripper assembly as a unit, will always be restored to its original position after removal. Such removal can readily be effected by loosening the clamping screw 232 and withdrawing the dovetail 230 from its slot in the slide 94 while holding the grippers 26 and 28 squeezed together to enable the roll 242 to clear the wall of the groove 250.

To guide the plunger block 244 for heightwise reciprocation, a stern 252 extending up from the plunger block slides freely in a bore 254 formed in the slide 94. Such reciprocation is derived from the rockshaft 60 through a train of linkage comprising a rocker arm 256 (Fig. 1) extending from the rockshaft and pivotally connected by a pin 258 to one end of a link 260, the opposite end of this link being pivotally connected by a pin 262 to an upstanding arm of a bell crank 264 fulcrumed on a pin 266 secured in the slide 94; a horizontally extending arm of the bell crank is pivotally connected by a stud 268 to the upper end portion of a link 270 the eifective length of which link can be adjusted by a turnbuckle 272; and the lower end portion of the link 270 is pivotally connected by a pin 274 to the plunger block 244. A draw bolt 275 secures the pin 274 in the lower portion of the link 270.

The trimming knife 30 (Figs. 7, 8 and 9) has its cutting edge extending in the path of the advancing outer channel lip, and is positioned with the lowermost point of its cutting edge over and substantially in contact with the blade of the outer channeling knife 22 so as to trim the lip just after the lip has been cut and while it is being turned up by the blade of the channeling knife. The trimming knife 30 is shown herein as positioned directly over the edge of the sole W, since its function is not required when operating around the forepart. However, during the performance of the operation along the shank, the edge gage 40 was set further to the right and the trimming knife 30 was therefore positioned within the edge of the sole W where it could trim off the excess width of the outer channel lip. The trimming knife 30 is carried by a block 276 having a depending portion 278. A clamping screw 280 threaded in the block 276 exerts pressure through a clamping plate 282 to hold the shank of the trimming knife 30 in heightwise adjustment against a wall of a recess formed in the block 276 and its depending portion 278. The upper portion of the block 276 is split and has a dovetail recess engaging a dovetail 284 integral with the block 148 and extending therefrom in a direction transverse to the path of feed of the work to enable the trimming knife 30 to be adjusted in that direction. A clamping screw 236 threaded in the block 276 is tightened to hold the block in adjusted position on the dovetail 284.

The chip deflector 31 is secured upon the block 276 by a clamping screw 288 (Fig. 2).

The rib depresser 32 (Figs. 2 and 7 to ll inc.) fits into a slot 290 (Fig. 11) extending through the presser gage 36, the rib depresser being adjustable heightwise in the slot. To this end the rib depresser has an integral upwardly extending offset plate 292 which is clamped, indirectly, against the back face of the presser gage by a screw 294 extending through a vertical slot 296 (Fig. 7) in the plate and threaded in the presser gage. Upon completion of the rib forming operation in sewed heel seat work the leading end of the rib R comes into engagement with the rib depresser 32 which holds the work down away from the channeling knives 22 and 24 to prevent the knives from cutting deeper into the work as the leading ends of the channels already cut pass under the knives. The lead ing end of the rib R is not, as might be expected, vertical (see dash lines in Fig. 9), but is inclined as a result of the deforming action of the channeling knives on the leather channel lips. The camming action of the rib depresser upon the rib is obtained not only from the inclination of the leading end of the rib, but also from the fact that the portion of the rib depresser which first engages the rib is suitably rounded.

A heating element 2% (Figs. 7 and 8) is retained in a groove in the presser gage 36 by a cover plate 3% (see also Fig. 2) which is interposed between the flat faces of the presser gage and the plate 232 and is held in place by the clamping screw 294 and by a dowel pin 302 (Fig. 2) in the presser gage. A cover plate is provided also at the top end of the presser gage to retain the heating unit 298 against heightwise movement. Current is supplied to the heating unit by electrical leads 334 (Fig. l). The presser gage 36 is thus heated to a temperature sufiicient to reactivate the cement on the sole and also to render the cement slippery and thereby reduce the frictional drag of the presser gage on the sole.

The rib guide and support 34 comprise a fiat plate integral with an upwardly inclined flange by which it is clamped in a desired position of angular adjustment about a rod 306 (Fig. 1) extending in the direction of feed of the work. The rod 306 has a transverse portion which is clamped, by a set screw 3%, in a bore formed in a stationary bracket 310 secured to the frame of the machine, said transverse portion being angularly adjustable and also slidable in its bore to enable the rib guide 34 to be suitably positioned both heightwise and transversely of the path of feed. Ample clearance is provided between the operative portion of the rib guide 34 and the upper surface of the work piece. As the rib forming operation is being completed, the leading end of the rib R (see Fig. 8) comes into engagement with the rib guide 34 and is thereby restored to an upright position from which it had been bent by forces resulting from the curvature of its path. The rib R is thus held out of the path of the descending feed foot 38 and in a position to enter the slot 290 of the presser gage 36.

The work table 26 is carried indirectly by a block 312 (Fig. 6) along which it is slidable for adjustment in the direction of feed of the Work. A clamping screw 314 threaded in the block 312 and passing through a slot 316 in a depending portion of a supporting member 313 on which the work table 29 is mounted holds the work table in adjusted position. The block 312 is clamped by a screw 320 to a dovetail slide 322 which is guided for heightwise movement in a dovetail guideway formed by an undercut portion of the frame 42 and a gib 324. Screws 326 threaded through a flange of the frame 42 and'bearing against the gib 324 facilitate adjustment of the gib. Clamping screws 328 passing through clearance holes in the gib 324 and threaded in the frame 42 maintain the gib in adjusted position. An upper toggle link 330 and a lower toggle link 332 have their adjacent ends pivotally connected by a pin 334. The remote or upper end of the upper toggle link 330 is pivotally connected by a shoulder screw 336 to the slide 322, and the remote or lower end of the lower toggle link 332 is pivotally supported upon an eccentric stud 338 rotatable for adjustment in a split bearing formed in a lug 340 depending from a portion of the frame 42. A clamping screw 342 binds the two portions of the split bearing lug about the eccentric stud 338 to hold it in adjusted position. Extending substantially horizontally from the lower portion of the lower toggle link 332 is a bell crank arm 344 to which is pivotally connected the upper end of a treadle rod 346. The lower end portion of the treadle rod 346 is freely slidable in a block 348 and is secured by a set screw 350 to another block 352 below the block 348. Freely slidable in the block 352 is a rod 354 the lower end of which is pivotally connected to a treadle 356. A spring 353 normally holds the treadle 356 in an up position determined by a stop (not shown). A spring 363 having its upper end anchored to the frame 42 and its lower end secured to an car 361 on the link 330 tends to rotate the link 330 clockwise about the pin 336. A lug 362 extending up from the lower toggle link 332 has a flat upper surface which engages a fiat undersurface on the upper toggle link 334} to hold the toggle from going more than slightly to the left beyond dead center under the influence of the spring 360. The work table 2t) is thus held up positively in a working position the height of which is determined by the adjustment of the eccentric stud 333. The Work table 20 can be lowered by depressing the treadle 356, causing the block 348 first to descend until it engages the block 352 and then to depress the block 352, pulling down on the treadle rod 346 to cause the bell crank extension 344 to rock clockwise and break the toggle.

For raising the channeling knives 22 and 24 and also the other members carried by the slide 94, rack teeth 364 (Fig. 5) provided on the slide are engaged by a toothed sector 366 having an integral lever arm 368 fulcrumed on a pin 370 mounted in the frame 42. The upper end portion of a treadle rod 372 has a slot 373 to provide a lost motion connection with a screw stud 375 on the lever arm 368, and the lower end portion (Fig. 6) is secured by a set screw 374 to a block 376. Slidable in a bore in the block 376 is a rod 373 the lower end of which is pivotally connected to the treadle 356. A compression spring 380 surrounding the rod 378 has its upper end bearing against a collar 3S2 adjustably secured on the rod and its lower end bearing against the upper face of the block 376. A collar 384 adjustably secured to the rod 378 below the block 3'75 engages the under face of the block to limit the expansion of the spring 380.

To operate the machine the treadle 356 is first depressed far enough to take up the relatively small amount of lost motion of the slot 373, and then it is depressed still further to raise the slide 94 and with it the knives 22, 24 and 36, the chip deflector 31, the grippers 26 and 28, and the presser gage 36. Such depression of the treadle can raise the slide 94 because the spring 380 is strong enough to overcome the resistance of the spring 104 and does not yield until the upward movement of the slide is stopped by contact of the head of the screw 124 with an under surface of the block 118. Still further depression of the treadle breaks the toggle (links 336 and 332) and lowers the work table 20. An insole W is now placed upon the work table with its edge against the edge gage 40 and the treadle is released, first permitting the work table 20 to rise to its operating position and then permitting the slide 94 and the members carried thereon to descend to their operating positions. As soon as the work table has come up to operating position the feed foot 38 becomes effective to advance the insole W step by step, and as soon as the slide 94 has come down to operating position the channeling knives 22 and 24 cut into the surface of the insole, and the other members carried by the slide also begin to perform their functions. The insole is urged against the edge gage 40 by a cross feed pressure dependent upon the adjustment of the work .table 20 along the direction of feed of the work; the

screw 314 and the slot 3116 provide for such adjustment. The operation upon ordinary insoles, which are channeled from heel breast line to heel breast line, continues as described in Letters Patent 2,510,208 above mentioned. For such work an ordinary feed foot can, if desired, be used in place of the oil-center feed foot 38 already described.

In sewed heel seat work the continuity of the sewing rib R around the margin of the insole gives rise to difficulties in completing the operation and in removing the upstanding rib from the slot 290 in the presser gage 36, which difficulties are satisfactorily overcome by the use of the machine herein disclosed. The fact that the feed foot 38 is oifcenter enables the leading end of the advancing upstanding rib R to get past it, and the rib guide and support 34 holds the rib upright against any tendency to bend into the path of the descending feed foot or to bend out of alinement with the slot 290 in the presser gage 36. When the operation is close to completion, the gaging surface of the presser gage 36, as shown in Fig. 11, extends over the empty spaces left by the raised channel lips, leaving only a small portion of the gaging surface (at the left) in contact with the insole. The channeling knives 22 and 24 have a plough-like tendency to dig into the material of the insole and, but for the rib depresser 32, would draw up the flexible insole and continue cutting indefinitely or until the operator removes the work from the machine. The function of the rib depresser is to hold the insole down until the channeling knives emerge from the work at the level of the channels already cut. The operator then depresses the treadle 356 to raise the slide 94 as high as it will go, and he continues depressing the treadle to cause the block 348 to engage the block 352 and push the latter down, thus breaking the toggle (links 330 and 332) and lowering the work table 20. When the work table is lowered, the feed foot 38 becomes ineffective to advance the work piece. With the slide 94 in its raised position and the work table 20 in its lowered position, the continuous rib R can readily be disengaged from the slot 290 in the presser gage 36.

The orbital path of the feed foot 38 is shown on an enlarged scale in Fig. 13. The free path of the feed foot is shown in full lines and the feed stroke, when advancing a four iron insole, is shown in dash lines. The pressure of the feed foot upon the work is limited by the spring 51. For thick insoles the work table 20 is adjusted down and for thin insoles the work table is adjusted up; in either case the lower portion only of the orbital path of the feed foot is utilized. Such lower portion has the desirable characteristics of approximately vertical heightwise movements of the feed foot as it descends into engagement with the work piece and rises from engagement therewith.

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 channeling shoe soles, a work table for supporting a sole to which has been applied a coating of cement, a pair of channeling knives constructed and arranged to cut and partially raise a pair of channel lips on the sole, means for pressing together the partially raised channel lips to cause them to adhere together and thus to form an upstanding sewing rib, a presser gage engageable with the top face of the sole for gaging the depth of cut of the channeling knives and having a slot for receiving the leading end of the rib upon completion of the rib forming operation all the way around the marginal portion of the sole, a feed foot engageable with the top face of the sole at one side of the raised rib to enable it to clear the leading end of the rib at the completion of the operation, and a rib depresser adjustably secured in said slot for engaging the leading end of the sewing rib to hold the work piece down away from the knives to prevent the knives from cutting deeper intothe work at the completion of the operation.

2. In a machine for channeling shoe soles, a work table for supporting a sole to which has been applied a coating of cement, a pair of channeling knives constructed and arranged to cut and partially raise a pair of channel lips on the sole, means for pressing together the partially raised channel lips to cause them to adhere together and thus to form an upstanding sewing rib, a presser gage engageable with the top face of the sole for gaging the depth of cut of the channeling knives and having a slot for receiving the leading end of the rib upon completion of the rib forming operation all the way around the marginal portion of the sole, means for feeding the sole in operative relation to the channeling knives, and a guide engageable with a lateral surface of the upstanding rib to hold the rib upright against a natural tendency to bend, said rib guide being positioned to engage the leading end of the rib and thus facilitate the entry of the rib into the slot as the operation is being completed.

3. In a machine for channeling shoe soles, a work table for supporting a sole to which has been applied a coating of cement, a pair of channeling knives constructed and arranged to cut and partially raise a pair of channel lips on the sole, means for pressing together the partially raised channel lips to cause them to adhere together and thus to form an upstanding sewing rib, an edge gage engageable with the edge of the sole to gage the sole relatively to the prospective sewing rib to be formed by the knives and the pressing means, a feed foot engageable with the top face of the sole at one side only of the prospective rib to enable it to clear the leading end of the upstanding rib at the completion of the operation, means for driving the feed foot in an orbital path to feed the sole step by step, and a guide engageable with a lateral surface of the upstanding rib to hold the rib upright against a natural tendency to bend, said guide serving to hold the rib up out of the path of the descending feed foot.

References Cited in the file of this patent UNITED STATES PATENTS 952,701 Eppler Mar. 22, 1910 984,773 Meyer Feb. 21, 1911 1,658,347 Meyer Feb. 7, 1928 2,015,064 Bertrand Sept. 24, 1935 2,186,161 Bertrand Jan. 9, 1940 2,508,361 Baker May 23, 1950 2,510,208 Bertrand June 6, 1950 2,611,912 Maciejowski et al. Sept. 30, 1952

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