US3000024A

US3000024A - Shoe machine

Info

Publication number: US3000024A
Application number: US793507A
Authority: US
Inventors: Hlobil Frank; Schwabe Herman
Original assignee: Herman Schwabe Inc
Current assignee: Herman Schwabe Inc
Priority date: 1959-02-16
Filing date: 1959-02-16
Publication date: 1961-09-19
Anticipated expiration: 1978-09-19

Description

Sept. 19, 1961 F. HLOBIL El'AL 3,000,024

SHOE MACHINE Filed Feb. 16. 1959 4 Sheets-Sheet l.

@ (Ella- A/l/EA/TOES FRANK a HERMAN JCHWA BE A TTOZMSYS Sept. 19, 1961 F. HLOBIL ETAL SHOE MACHINE 4 Sheets-Sheet 2 Filed Feb. 16, 1959 Sept. 19, 1961 F. HLOBIL ET AL 3,000,024

SHOE MACHINE Filed Feb. 16, 1959 4 Sheets-Sheet s INVENTORS. 52,4 /V/ 6 4 Al 5c W85 BY HEM/A H A P 1961 F. HLOBIL EFAL 3,000,024

snos MACHINE Filed Feb. 16, 1959 4 Sheets-Sheet 4 i i INVENTORS.

Ti 17. FRANK Mae/L JcHM/ABE BY HER/"41V A T B E75 United States Patent i 3,000,024 SHOE MACHINE 7 Frank Hlobil, Laurelton, and Herman Schwabe, New

York, N .Y., assignors to Herman Schwabe, Inc., Brooklyn, N.Y., a corporation of New York Filed Feb. 16, 1959, Ser. No. 793,507 20 Claims. (Cl. 128.3)

This invention relates to shoe machines, and more particularly to a shoe machine for simultaneously lasting, trimming and roughing.

The primary object of the present invention is to generally improve shoe machines. A more particular object is to provide a shoe machine which will simultaneously last, trim, and rough an upper, and which is particularly useful at the toe of the shoe.

Another object is to provide such a machine which will perform the desired operation readily and rapidly with a minimum of Worker fatigue.

Still another object is to provide such a machine which is particularly suitable for modern shoe manufacturing techniques based on the use of quick-setting cements.

To accomplish the foregoing general objects, and other more particular objects which will hereinafter appear, our invention resides in the shoe machine elements and their relation one to another, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings in which:

FIG. 1 is a front elevation of a machine embodying features of the present invention;

FIG. 2 is a side elevation of the same;

FIG. 3 is a partial plan view of what is here termed a shoe assembly, meaning an assembly of last, insole and upper, with the latter already side lasted, but still awaiting the toe lasting operation;

FIG. 4 is a section taken approximately in the plane of the line 44 of FIG. 3;

FIG. 5 is a similar section showing the shoe assembly engaging a double screw lasting tool forming a part of the present machine;

FIG. 6 is a plan view after the machine operation;

FIG. 7 is a diagram showing the hydraulic flow circuit of the machine;

FIG. 8 is a vertical section drawn to larger scale through the upper portion of the machine;

FIG. 8A is explanatory of a detail;

FIG. 9 corresponds to the upper part of FIG. 8, but shows the tool pressure relieved and the tool raised;

FIG. 10 is a fragmentary plan view taken in the plane of the line 10-10 of FIG. 9;

FIG. 11 is a side elevation similar to FIG. 2, but showing a modified form of the machine;

FIG. 12 is a front view of the upper end of the machine shown in FIG. 11;

FIG. 13 is a front view of the lower or base portion of the machine;

FIG. 14 is a plan view of an eccentric connecting rod; drawn to enlarged scale;

FIG. 15 is explanatory of its operation;

FIG. 16 is explanatory of the resulting horizontal vibration of the tool;

FIG. 17 is an end View of the tool showing its multiple threads; and

FIG. 18 is a diagram showing the hydraulic circuit of the modified machine.

Referring to the drawing, and more particularly to FIGS. 3 and 4, the shoe assembly which is to be operated on by the present machine comprises a last 12 (FIG. 4) carrying an insole 14 and an upper 16. The upper has already been pulled over the last, and has been side lasted as is indicated at 18 in FIG. 3. In the usual case, the upper will have been heel lasted, and what remains to 3,000,024 Patented Sept. 19., 1961 be done is to last the forward or toe portion of the shoe.

This is the most difiieult part of the lasting operation because of the large excess of material around the toe, which forms into folds or pleats. When dealing with leather, this excess material must be pounded down, and some of the excess trimmed or skived off. Following the lasting operation, as heretofore done, the inturned upper material may be roughened in another machine preparatory to cementing an outsole in position.

Referring now to FIG. 5 of the drawing, the tool of the present invention is a rotating tool 20 which has lefthand threads 22 and righthand threads 24 disposed end to end and meeting at the middle of the tool. The shoe assembly, generally designated 26, is held forcibly against the tool, and the tool is rotated in that direction which causes the tool threads to pull the upper inward around the insole as it presses the upper against the insole. The shoe assembly is preferably mounted on a carriage, generally designated 30 in FIG. 2, for moving the shoe assembly 26 in a direction which is lengthwise of the shoe, and transverse to the axis of the tool, at the middle of the tool. The result is to pull, pound and flatten the upper around the toe of the assembly against the insole 14, as shown at 28 in FIG. 6.

The tool shown in FIG. 5 preferably has multiple threads at each end, as is indicated in FIG. 17 in which there are two threads. This maintains the desired spacing between threads, while increasing the angle or pitch for a more substantial and rapid pulling action.

For pulling action alone the threads might be made somewhat rounded, but in accordance with a further feature of the invention the threads are made rather square and are given relatively sharp corners. The tool is also hardened like a cutting tool, to withstand wear. In addition to its rotation, it is given a rapid vibration, as is subsequently described. The net elfect is to provide a trimming and roughing action on the inturned edge of the upper, that is, the threads serve to trim away any excessive projection at the pleats around the toe, and serve to roughen the inturned leather even further from the toe where there is no great problem of pleats.

Referring now to FIGS. 1 and 2 of the drawing, the tool 20 is driven by an electric motor 32 mounted at 34 on the base or pedestal 36 of the machine. To rotate the tool, motor 32 drives a pulley 38 and belt 40 turning a pulley 42. This drives another adjacent pulley 44 (FIG. 1) belted to a pulley 46 (FIG. 2) by means of a belt 48. Pulley 46 in turn drives a pulley 50 (FIG. 1) connected to a pulley 52 by means of a generally upright belt 54. Pulley 52 is secured directly on the shaft of tool 20 to rotate the same. The reason for the indirect or multiple belt drive is to accommodate certain desired vertical and horizontal movements of the tool which are described later.

The tool is preferably vibrated transversely of its axis, in addition to being rotated. As here constructed, the vibration is preferably limited to a substantially horizontal vibration, that is, a vibration in a plane substantially parallel to the plane of the sole of the shoe being operated on. In the present case the desired vibration is obtained by means of an eccentric mounted on the tool shaft. Referring to FIG. 5, tool 20 is mounted on or is formed integral with a tool shaft 56. This rotates in bearings 58, preferably anti-friction ball bearings, mounted in a hanger 60. At one end the shaft 56 carries an eccentric 62. This is preferably fitted with an anti-friction bearing such as the roller bearing 64.

Referring now to FIG. 1, the said roller bearing is carried within the forward end 66 of a generally horizontal connecting rod 68, the rear end of which is pivotally anchored on the stationary machine frame at 70.

is pivoted at 70, while the forward end 66 surrounds the eccentric.

Inasmuch as the connecting rod 68 readily accommodates vertical vibration, but prevents horizontal vibration, the result of this arrangement is that the tool shaft 56 is subjected to a horizontal vibration. This may be further explained with references to FIGS. 14-16 of the drawing (which, however, apply more specifically to the eccentric connecting rod of the modified machine shown at 68 in FIG. 11). In FIGS. 14 and 15the connecting rod 68' is pivoted or anchored on the machine frame at 70', while the forward end 66' is clamped at 72 around the roller bearing 64' and eccentric 62'. The tool shaft is indicated at 56'. It will be evident that on rotation of shaft 56', the eccentric will cause a vertical vibration of the connecting rod 68.

Referring now to FIG. 16, the hanger 60 is pivoted against vibration at its upper bearings 74. The hanger carries the tool shaft 56' in its lower bearings 58. Thus, the shaft 56' and the lower end of the hanger 60 maybe vibrated horizontally but not vertically.

When the mechanisms of FIGS. 15 and 16 are combined, the result is a horizontal vibration of the tool as it rotates, without vertical vibration.

The shoe assembly is mechanically clamped on the carriage 30, and a preferred mechanism for the purpose may be described with reference to FIGS. 8 and 9 of the drawing. For this purpose the carriage is provided with an adjustably located toe support generally designated 80, and an adjustably located heel support 82. The support 84 is adjustable horizontally on ways 84, and the adjustment is locked at 86. It is adjustable vertically by means of an adjusting screw 88 locked at 90 by means of a knurled collar acting as a lock nut.

The heel rest 82 is horizontally adjustable on ways 92, the adjustment being locked at 94. It is vertically adjustable by means of a screw 96. The angle of the screw is also adjustable on a pivot 98 under control of a screw 100.

The shoe assembly here is held in position by hydraulically actuated clamp means. In the present case a clamp 102 is pivotally carried at 104 on a C-shaped arm 106 pivoted at 108. The C-arm 106 is connected to an hydraulic actuator comprising a piston 110 movable in a cylinder 112. The latter is pivotally mounted at 114.

It will be evident that on supplying power to cylinder 112, the clamp 102 is forced forward and downward on the shoe assembly, the latter being restrained by the toe and heel rests 80 and 82. The clamp 102 is located far enough back of the toe to permit the lasting operation.

Some preliminary upward pull of the toe portion of the upper is provided, as the shoe assembly is being clamped in position on the carriage. For this purpose, the toe rest 80 is provided with jaws 116 best shown in FIG. 10. These are lined with a cushion 118 made of rubber or like yieldable material. The jaws 116 are pivoted at 115. The adjacent ends of the jaws are drawn together by a pull spring 128, but when the shoe assembly 26 is being clamped it is pushed forward as well as downward, and thus the toe spreads apart the adjacent ends of the jaws, which at the same time causes the opposite ends to move together. The net result is to make the jaws self-adjustable for different size shoes because a narrower shoe will move further forward until the sides of the jaws bear against the sides of the narrower shoe.

The shoe assembly is first positioned on the heel rest with the toe portion over the jaws. Appropriate means, in this case a foot treadle, energizes actuator 112, whereupon clamp 102 forces the toe portion of the shoe assembly forward and downward between the jaws with a consequent wiping action and pull of the upper to draw it taut around the toe portion of the last. By then using another treadle the carriage 30 is moved bodily to move the shoe assembly beneath thetool.

The manner in which this feed of the shoe beneath the tool is obtained will be clear from inspection of FIGS. 2 and 8 of the drawing. The carriage 30 is pivotally mounted on the pedestal at 130. The point 130 is disposed well beneath the tool 56, and gives the shoe assembly an arcuate travel. This is preferable to a straight line motion because the sole of substantially all shoes has some convexity. The carriage 30 has an arm 132 projecting into the machine housing, and this arm is connected to an hydraulic actuator 134. When the actuator forces the arm 132 downward, the carriage 30 travels the forepart of the shoe beneath the tool.

Referring now to FIG. 8, the actuator-134 comprises a cylinder 136 and a plunger 138. The latter is pivotally connected at 140 to a nut 142 receiving an adjusting screw 144. This screw is rotatable in

bearings

146, 148 and 150, the latter being mounted on the carriage pivot 130 so that the screw may move bodily with the carriage 30 and arm 132. At its outer end the screw 144 is provided with an adjusting wheel or crank 152. By rotating the screw the connection of the actuator to the arm 132 is readily adjustable toward or away from the pivot 130 of the carriage, thereby varying the stroke or travel of the shoe beneath the tool.

During its operation the tool exerts considerable pressure on the shoe assembly. However, the tool is preferably yieldable in order to accommodate pleats and changes in height of the sole resulting from possible change in radius as between the carriage pivot 130 and the sole. Referring to FIG. 8, the tool shaft 56 is carried on a tool arm 154 pivoted on the machine frame at 156. Arm 154 extends into the machine housing at 158, and its inner end 160 is urged upward by means of a compression spring 162. This urges arm 154 and tool 56 downward. The tool shaft 56 is preferably carried in the generally upright hanger previously referred to, and the upper end of hanger 60 is pivoted at 164 on arm 154. The use of hanger 60 affords better working access to the tool, and accommodates the horizontal vibration of the tool previously referred to.

Compression spring 162 is carried by an upright rod 166, the upper end of which is threaded and receives a nut shown at 168 in FIG. 8A. The nut is carried by trunnions 170 in a bifurcated arm 172, the purpose of which will be explained later.

Reverting now to FIG. 8, during operation of the machine, the nut in effect bears against the top wall 184 of the machine housing, and is there held forcibly by the bifurcated arm 172. The lower end of spring 162 is supported against downward movement by the rod 166, and consequently the tool is resiliently urged against the work, and can yield upward. The force with'which the tool presses the work is adjustable by rotation of the screw in the nut carrying the same, and this may be done by applying a wrench to the square upper end 174 a of the screw 166.

It is desirable to release the tool pressure and even to raise the tool from the sole, during the return movement of the shoe assembly. For this purpose, the nut carrying the screw 166 is itself carried by the lever 172 which is pivoted in the machine housing at 180. The opposite end of lever 172 is pivotally connected at 182 to hydraulic actuator 134. When the latter is under pressure, lever 172 rises until its top surfaces bear directly against the top wall '184 of the machine housing. This is the condition shown in FIG. 8 when working on the shoe assembly.

However, when pressure is relieved for the return movement of the shoe assembly, the actuator 134 might dropgof its own weight, or by means of a return spring, thus moving the parts to the position shown in FIG. 9 in which lever 172 bears down on the end of the tool arm, thereby raising the hanger 60 and tool 20 from the sole. In the present case the actuator is double acting,

and works regardless of weight or spring. The tool lift needed may be slight, and may be controlled by an adjustable stop wheel 186 which is threadedly received on the screw 166, so that the wheel may be raised or lowered relative to the screw. The parts sink until the hub 188 of the wheel bears against the top 184 of the machine housing, as shown in FIG. 9, and in contrast with the position of the hub 188 shown in FIG. 8.

It is clear that a separate actuator might be used to raise and lower the lever 172, the said actuator being controlled by a single treadle operated valve, because the actuator would be energized at the same time that the carriage is to be moved. However, in the form of the invention here shown a single actuator 134 is operatively connected at its upper end to the tool arm, through intermediate mechanism such as lever 172 and screw 166, and the same actuator is operatively connected at its other end to the carriage 30 through the carriage arm 132, and thus a single actuator serves both purposes.

It may be mentioned that the carriage 30 also could return under its own Weight, or by means of a return spring, but in the present machine the actuator 134 is a double acting unit controlled by a regular 4-way valve, so that the motion of the actuator is positive in both directions. Thus, the lever 172 and the carriage arm 132 are positively pulled toward one another for the return movement.

Hydraulic power is supplied by a suitable pump driven by the electric motor previously referred to. This pump is shown at 190 in FIG. 1, mounted on one end of the motor 32. The pump may be a standard pump such as that manufactured by Gerotor May Company of Manchester, Michigan. A reservoir of oil or other hydraulic fluid is carried in the base of the machine, indicated at 192 in FIG. 2.

Referring now to FIG. 7, pump 190 pumps fluid from tank 192 through pipe 194. A desired pressure is maintained by a pressure relief valve 196. Pressure fluid flows through pipe 198 to a 4-way valve 200 controlled by a treadle 202. Valve 200 controls the main actuator 134, and as here arranged, depression of the treadle extends the actuator to work on a shoe, while release of the treadle raises the tool and returns the shoe. Fluid discharged from the actuator returns to tank 192 through pipe 204.

In a similar fashion, pressure fluid is supplied to the 4-way valve 206 which controls the clamp actuator 112. The valve 206 is operated by a treadle 208. As here arranged, depression of the treadle releases the clamp while the operator places a shoe on the heel and toe rests. When he releases the treadle the clamp is actuated and the shoe is pushed between the toe jaws and is held securely in position. The operator then may actuate the other treadle 202 to cause the tool to work on the shoe.

A modified form of the invention is illustrated in FIGS. 11 through 18 of the drawing. Referring to FIG. 11, it will be seen that the machine is generally the same as that previously described, it comprising a base 236 with a reservoir of hydraulic fluid 392. It further comprises a carriage 230 pivoted at 330 and having a carriage arm 332 which may be forced down by an acuator 334. The point of connection of the actuator to the arm is adjustable by means of a crank 352 operating a screw 344. As before, the carriage has an adjustable toe rest 280 and an adjustable heel rest 282. The toe rest is provided with jaws 316, and the shoe assembly may be forced between the jaws and clamped in position on the toe and heel rests by means of a clamp 302 on a C-arm 306 operated by an hydraulic actuator 312.

The tool 320 (FIG. 12) is carried in ball bearings at the lower end of a hanger 260, which is itself carried at the end of a tool arm 354 (FIG. 11), pivoted on the machine frame at 356. The opposite end 358 of arm 354 bears against a compression spring 362 carried on a screw 366. As before, the tool shaft carries an @C-Qentric which is itself received in the forward end of an eccentric rod 68', the latter being pivoted on the machine frame at 270. The purpose of these parts is to produce a horizontal vibration of the tool as it rotates, as was explained in connection with FIGS. 14, 15 and 16.

The modified machine has a number of significant differences. One is that the multiple belt drive shown in FIG. 2 has been eliminated by using a fluid motor 500 carried on the end of tool arm 354. This may be similar to the pump previously described as made by Gerotor May Company. It is connected to the tool shaft by means of a belt 254 and pulley 252 (FIGS. 11 and 12). Many different hydraulic motors and pumps are made and may be used.

Another change is that the pump here used is a submerged pump indicated at 390. The motor 332 is disposed with its shaft generally upright and leading directly down to the submerged pump 390, which again may be of the type made by Gerotor May Company, for example.

Another difference is the use of 4-way valvm one of which is actuated by two treadles. The 4-way valves are disposed in front of the base of the machine, as is clearly shown in FIG. 11. Referring now to FIG. 13, valve 406 is controlled by

treadles

408 and 409. With this arrangement the valve remains in position without requiring the operator to keep his foot on the treadle, as was the case with the single treadle shown in FIG. 1 of the drawing. Actually, treadle 408 controls the valve, but is latched when depressed, and treadle 409 releases the latch.

Another difference in the machine shown in FIG. 11 centers about the arrangement to release the tool and raise it during return movement of the shoe assembly, as well as to adjust the working pressure of the tool. As before, the screw 366 is carried in a nut which is itself pivotally carried at 670 (FIG. 11) by a lever 372 which is pivoted in the machine frame at 380. The lever has an extension 381 which acts as a stop to limit downward movement of the actuator 334. There is an adjustable stop 373 the bottom of which limits the upward movement of lever 372 when the actutator is extended.

Screw 366 is rotated by an adjusting handle 374 which is equivalent to the squared end -174 in FIG. 8. The adjustment may be locked by means of a lock lever 375, the sleeve-like hub 377 of which reaches down to the nut, thus acting as a lock nut to lock the adjustment of the screw 366.

The hydraulic flow diagram is given in FIG. 18 of the drawing. Referring to that figure, the submerged pump is shown at 390, and pumps fluid from tank 392. The pressure is determined by a relief valve 396.

Fluid is supplied through pipe 405 to the 4-way valve 406 which controls the operation of clamping actuator 312. As noted above, the 4-way valve is itself controlled by the treadle 408 which is spring returned but which also has a latch, symbolically indicated at 409. Thus when treadle 408 is pressed down, it remains down until released by touching the other treadle 409.

The fluid motor which rotates the tool is indicated at 500. It is connected to that side of the 4-way valve 406 which actuates the clamp, and thus the motor runs as long as a shoe is clamped in the carriage, and the motor stops when the shoe is removed from the carriage. The speed of the motor may be regulated by means of a valve 501.

Pressure fluid also flows through pipe 398 to 4-way valve 400 which controls the main actuator 334. This valve 400 is operated by a signal treadle 402 which has a spring return.

The shoe assembly is locked in position by stepping on foot pedal 408, which actuates the hydraulic clamp cylinder to push the shoe assembly forward and downward into the nesting mould or toe clamps. The toe rest is adjusted to set the vertical position of the last in relation to the tool. Left or right shoes can be lasted without change of the nesting toeclam-p. Adjustment for difierent sizes of shoe can be made by leaving the toe rest in place, and moving the heel support backward or forward. After the shoe assembly is locked in place, and the operator has properly adjusted and located it, the operator depresses the foot pedal 402 which actuates the main hydraulic cylinder, which in turn lowers the tool and moves the shoe assembly toward and under the tool. The amount of shoe portion to be lasted can be adjusted by varying the travel by means of the handwheel 352.

When. the lasting of the shoe is completed, the operator releases the foot pedal 402 which reverses the oil flow in the main hydraulic cylinder. This not only returns the shoe assembly to the original position, but also lifts the lasting tool so that there is no contact between the lasting tool and the shoe on the return motion. Treadle 409 is then touched to release the shoe assembly.

It is believed that the construction and operation of the improved shoe machine, as well as the advantages thereof, will be apparent from the foregoing detailed description. In a single operation the machine serves to last the toe portion of the shoe, and to trim and rough the edge of the upper. This may be done rapidly and expeditiously, without operator fatigue, because all of the movements are powerized. The combined vibration and rotation of the tool helps trim excess leather at the pleats, and also helps pound or flatten the folds or pleats at the toe portion.

Another advantage is that the tool will take care of substantially all shapes of lasts. This is particularly importion because the bottom of the last is never straight, yet heretofore the work had to be done by straight metal wipers.

Although the operation has been described as applied to the toe portion of a shoe, and the invention is considered most valuable for that purpose, it may be thought of as treating either end of a shoe, rather than the toe of the shoe, because the same tool and principles may be applied to heel lasting, if desired.

It will be apparent that while we have shown and described our invention is several preferred forms, changes may be made in the structures shown, Without departing from the scope of the invention as sought to be defined in the following claims.

We claim:

1. A shoe lasting machine comprising a rotatably mounted tool in the form of a screw with left and righthand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means to move said support means in order to move said shoe assembly against said tool, with the plane of the insole substantially parallel to the axis of the tool, and with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, and motor means to rotate the tool in that direction which causes the tool to pull both sides of the upper simultaneously inward around the insole as it presses the edge of the upper against the insole.

2. A shoe machine as defined in claim 1, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool, and the means to move said support includes a power actuator which turns the carriage about the pivot in order to move the shoe beneath the tool.

3. A shoe machine as defined in claim 1, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool and having a carriage arm extending from the carriage, and the means to move said support includes an hydraulic actuator which is attached [to and operates the carriage arm in order to move the shoe beneath the tool, and in which the point of attachment of the hydraulic actuator to the carriage arm is readily adjustable toward or away from the pivot of the carriage in order 'to vary the travel ofthe shoe beneath the tool.

4. A shoe machine as defined in claim 1, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool, the means to move said support includes an hydraulic actuator which operates the carriage to move the shoe assembly beneath the tool, and in which the tool is rotatably carried by a tool arm affording vertical movement of the tool, and in which resilient means is provided for urging the arm and tool downward as the shoe assembly is moved end first beneath the tool, and which has means to release the tool pressure and to raise the tool from the sole during return movement of the shoe assembly, and in which a single hydraulic actuator is operatively connected at one end to the carriage, and at the other end to the tool arm in such fashion as to simultaneously move both the carriage and tool arm in desired directions.

5. A shoe machine as defined in claim 1, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively 'adjustably located toe and heel supports for the shoe assembly, and in which the toe support includes jaws which serve to wipe the upper snugly around the last as the toe portion of the assembly is forced between said jaws.

6. A shoe machine as defined in claim 1, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively adjustably located toe and heel supports for the shoe assembly, and power actuated clamp means for bearing on the shoe assembly to hold it as it is moved by the carriage beneaththe tool.

7. A shoe machine as defined in claim 1, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively adjustably located toe and heel supports for the shoe assembly, and in which the toe support includes jaws which serve to the upper snugly around the last as the toe portion of the assembly is forced between said jaws, and power actuated clamp means for bearing on the shoe assembly in order to force the toe portion between the jaws.

8. A shoe machine as defined in claim 1, in which the tool is rotatably carried by a tool arm affording vertical movement of the tool, and in which resilient means is provided for urging the arm and tool downward as the shoe assembly is moved end first beneath the tool.

9. A shoe machine comprising a rotatably mounted tool in the form of a screw with left and righthand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means to move said support means in order to move said shoe assembly against said tool, with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, motor means to rotate the tool in that direction which causes the tool to pull the upper inward around the insole as it presses the edge of the upper against the insole, and additional means to vibrate said rotating tool in a direction transverse to the axis of the tool in a plane substantially parallel to the plane of the sole.

10. A shoe machine as defined in claim 9, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively adjustably located toe and heel supports for the shoe assembly, and in which the toe support includes jaws which serve to wipe the upper snugly around the last as the toe portion of the assembly is forced between said jaws.

11. A shoe machine as defined in claim 9, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively adjustably located toe and heel supports for the shoe assembly, and power actuated clamp means for bearing on the shoe assembly to hold it as it is moved by the carriage beneath the tool.

12. A shoe machine as defined in claim 9, in which the shoe assembly is received on a carriage pivoted at a point below the tool, and in which the carriage has relatively adjustably located toe and heel supports for the shoe assembly, and in which the toe support includes jaws which serve to wipe the upper snugly around the last as the toe portion of the assembly is forced between said jaws, and power actuated clamp means for hearing on the shoe assembly in order to force the toe portion between the jaws.

13. A shoe machine as defined in claim 9, in which the tool is rotatably carried at the lower end of a hanger depending :from a tool arm afiording vertical movement of the tool and hanger, and in which resilient means is provided for urging the arm and tool downward as the shoe assembly is moved end first beneath the tool.

14. A shoe machine as defined in claim 9, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool, and the means to move said support includes a power actuator which turns the carriage about the pivot in order to move the shoe beneath the tool.

:15. A shoe machine as defined in claim 9, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool and having a carriage arm extending from the carriage, and the means to move said support includes an hydraulic actuator which is attached to and operates the carriage arm in order to move the shoe beneath the tool, and in which the point of attachment of the hydraulic actuator to the carriage arm is readily adjustable toward or away from the pivot of the carriage in order to vary the travel of the shoe beneath the tool.

16. A shoe machine as defined in claim 9, in which the means to support the shoe assembly includes a carriage pivoted beneath the tool, and the means to move said support includes an hydraulic actuator which operates the carriage to move the shoe assembly beneath the tool, and in which the tool is rotatably carried at the lower end of a hanger depending from a tool arm afiording vertical movement of the tool and hanger, and in which resilient means is provided for urging the arm and tool downward as the shoe assembly is moved end first beneath the tool, and which has means to release the tool pressure and to raise the tool from the sole during return movement of the shoe assembly, and in which a single hydraulic actuator is operatively connected at one end to the carriage and at the other end to the tool arm in such fashion as to simultaneously move both the carriage and tool arm in desired directions.

17. A shoe machine comprising a rotatably mounted tool in the form of a screw with multiple left and righthand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means to move said support means in order to move said shoe assembly against said tool, with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, motor means to rotate the tool in that direction which causes the tool to pull the upper inward around the insole as it presses the edge of the upper against the insole, the threads of said tool being relatively square sharp threads, and additional means to vibrate said rotating tool in a direction transverse to the axis of the tool in a plane substantially parallel to the plane of the sole.

18. A shoe lasting machine comprising a rotatably mounted tool in the form of a screw with left and righthand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means movably mounting said support means to afford movement of said shoe assembly against said tool, with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, motor means to rotate the tool in that direction which causes the tool to pull the upper inward around the insole as it presses the edge of the upper against the insole, said tool being rotatably carried by a tool arm afiording vertical movement of the tool, resilient means urging the arm and tool downward as the shoe assembly is moved end first beneath the tool, and means affording lifting of the tool trorn the sole during return movement of the shoe assembly.

19. A shoe machine comprising a rotatably mounted tool in the term of a screw with left and right hand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means movably mounting said support means to afford movement of said shoe assembly against said tool, with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, motor means to rotate the tool in that direction which causes the tool to pull the upper inward around the insole as it presses the edge of the upper against the insole, additional means to vibrate said rotating tool in a direction transverse to the axis of the tool in a plane substantially parallel to the plane of the sole, said tool being rotatably carried at the lower end of a hanger depending from a tool arm affording vertical movement of the tool and hanger, resilient means urging the arm and tool downward as the shoe assembly is moved end first beneath the tool, means afiording lifting of the tool from the sole during return movement of the shoe assembly, and power means to move the said support means and the said lifting means.

20. A shoe lasting machine comprising a rotatably mounted tool in the form of a screw with multiple left and righthand threads disposed end to end, means to support a shoe assembly including a last with an insole and an upper, means to move said support means in order to move said shoe assembly against said tool, with the plane of the insole substantially parallel to the axis of the tool, and with the shoe assembly moving lengthwise transversely of the axis of the tool at the middle of the tool, and motor means to rotate the tool in that direction which causes the tool to pull both sides of the upper simultaneously inward around the insole as it presses the edge of the upper against the insole, the threads of said tool being relatively square sharp threads which tend to trim and roughen upper material at the pleats around the toe.

References Cited in the file of this patent UNITED STATES PATENTS 109,077 Tripp Nov. 8, 1870 445,613 Hemingway et a1 Feb. 3, 1891 1,179,509 Donlon Apr. 18, 1916 2,445,845 Baker July 27, 1948 2,735,117 Courchene et a1. Feb. 21, 1956