US1992274A - Shoe pressing machine - Google Patents

Description

E. E. WINKLEY SHOE PRESSING MACHINE Filed July 17, 1935 Patented Feb. 26, 1935 UNITED STATES SHOE .PRESSING MACHINE Erastus E. Winkley, Lynn,.,Mass., assignor to United Shoe Machinery Corporation, Paterson,

N. J., a corporation of New Jersey Application July 17, 1933, Serial N6. 680,734

21 Claims.

This invention relates to machines for applying pressure to the bottoms of shoes andmore particularly to machines of the'type inwhich a shoe support and a pressing or leveling tool, such as a roll, are relatively movable to cause the tool to operate progressively along the bottomof a shoe.

Well-known automatic machines of the abovementionedtype comprise in their organization a compression spring for pressing the leveling tool yieldingly on. the shoe and automatic means for varying the compression of the spring during the course of the leveling operation to vary the pressure appliedby the leveling tool to the shoe and thus, for example, to cause the tool to apply a relatively light pressure while operating on the forepart of the sole, which ordinarily is comparatively easy to level, and a somewhat heavier pressure along the shank portion of the sole, which it is ordinarily more diflicultto shape to the proper contour. While such machines, acting to vary the compression of the spring as above described, operate in an entirely satisfactory manner under most conditions of' use, it is sometimes difiicult to avoid certain undesirable results when operating by means of such machines upon turn shoes, especially if the leveling tool orxroll acts by direct engagement with the sole. It is a common practice to shape or level the sole of a turn shoe very shortly after the shoe has been turned and relasted and while the shoe materials, including the upper, are stillin a thoroughly moistened or tempered condition, it being well known that better leveling or shaping of the sole can be accomplished while the latter is in temper. The shoe upper being also in temper, however, and often. in fact being quite wet and slippery, the action of the leveling roll, if thepressure is too great, may cause the upper to slip and become laterally displaced on the last with the result that the toe portion of the sole will be oiTset edgewise from its proper relationto .the last bottom and a misshapen shoe will be produced. Furthermore, wrinkles may beformed in the sides of the upper near the toe of the shoe as a, result of the leveling pressure which is applied heightwise of the last to the moistened upper and bottom materials of the shoe if the pressure is excessive. Under some conditions, therefore, it is diflicult, by adjusting the compression of the single spring employed in machines of the above-mentioned character, to

.provide suificiently heavy pressure for adequate leveling or shaping of the shankportion of the crating upon the forepart ofthe shoe to avoid misshaping of the shoe and wrinkling of the upper as described. i

In view of the foregoing, one object of the present invention is to provide an improved ma- 5 chine for applying pressure to the bottoms of shoes which will operate efiiciently and reliably to apply to different portions. ofthe shoes leveling pressures which vary sufilciently inamount to avoid any such undesirable results as those hereinbefore referred to.

With this and other objects in View, the illustrated construction comprises separate means or mechanisms for applying pressure to difierent portions of the bottom of a shoe, one of these mechanisms, as herein shown, being "adapted to apply relatively light pressure to the forepart and the other to apply relatively heavy pressure to the shank portion of the shoe bottom and the construction and arrangement being such that, while a sufiiciently heavy pressure is provided for leveling the shank portion of the shoe, the pressure applied to the forepart may be made much lighter thanhas been practicable in machines of the above-mentioned character as here tofore constructed. Preferably, as shown, the means for applying the relatively light pressure to the forepart of the shoe comprises two relatively weak springs which are so arranged and so connected with a carrier on which the leveling roll is mounted that by relative adjustment of the stresses of these springs the amount of light pres-. sure applied to the shoe may be varied at will to suit conditions encountered in any particular class of work, or, if desired, the relative stresses of the springs may be so adjusted as to counterbalance the weight of the roll andits carrier or even to exert upward pressure upon the roll carrier to insure that the leveling roll will be inefiective to press upon and level the forepart of the shoe, in i which latter case the machine will be adapted to operate only along the shank portion of the shoe. The illustrated means for applying the relatively heavy pressure to the shank portion of the shoe comprises a third spring which is relatively strong or stiff and which is preferably maintained in an unstressed condition during those times when the forepart of the shoe is being operated upon so that byappropriate adjustment of the springs constituting the light pressure applying mechanism the leveling roll may be adapted to exert as little pressure as desired or no pressure whatever upon the forepart of the shoe.

The above and other characteristics of the invention including various novel features of construction and combinations of parts will now be more particularly described by reference to the accompanying drawing and pointed out in the claims.

The drawing is a view in side elevation, with portions broken away, showing as much of a leveling machine as is necessary to illustrate the application of the present invention thereto.

Leveling machines of the type illustrated are twin machines comprising two sets of operating instrumentalities for operating respectively on different shoes in different locations in the machine. For the purpose of an understanding of the present invention, however, reference will be made to only one of these sets of instrumentalities, since it will be understood that, except as will appear hereinafter, mechanism such as illustrated as an embodiment of the invention will be duplicated in the opposite halves of the machine and it is further to be understood that in its more general aspects the invention is not limited to machines of the twin yp i The machine shown in the drawing is a machine of the same-general type as that disclosed in United States Letters Patent No. 1,667,761, granted May 1, 1928, upon application of E. E. Winkley and H. A. Davenport. In the illustrated machine, as in the patented machine just referred to, a jack comprising a heel post 2 and a toe post 4 is adapted to support a shoe such as the shoe S while the bottom of the shoe is being operated upon by a leveling roll 6. The heel post Zand the toe post 4 are relatively adjustable for shoes of different sizes and the jack as a whole is movable about an axis 8 to carry the shoe forwardly and backwardly beneath the roll 6. The roll 6 is mounted in a holder 10 which is supported in a roll carrier 12 pivotally mounted at 14 on the frame 18 of the machine for swinging movements in a vertical plane to press the roll 6 against the shoe with difierent degrees of pressure on different portions of the shoe bottom. From the foregoing it will be understood'that the roll 6 with its holder 10 and carrier 12 constitute a pressure applying or leveling device which is movable downwardly to apply leveling pressure to the shoe. To cause theroll to operate progressively along the bottom of the shoe the jack is swung about its axis 8 by power-operated mechanism comprising a path cam 26 fast on a cam shaft 22 and connections whichit is unnecessary to describe for an understanding of the pres ent invention, inasmuch as such mechanism is fully disclosed in prior Letters Patent, for example, Nos. 1,011,361, granted December 12, 1911, on application of E. E. Winkley, and'1,239,- 664, granted September it, 4917, on application of W. C. Baxter. Briefly described, the cycle of operations of the machine, comprises, first, a movement of the jack to cause the leveling roll to'traverse the shoe from the toe to the heel seat, then a plurality of backward and forward movements while the roll is operating on the shank at one side of the shoe bottom, then a movement to cause the roll to return to the toe along one side of the shoe and then to traversethe shoe bottom from the toe to the heel seat along the opposite side of the shoe, thereafter a plurality of backward and forward movements to cause the roll to operate in the shank at that side of the shoe, and finally a movement to cause the roll to return to the toe and to leave the shoe. In the course of these operations the roll is tipped in various ways by movement of its holder 10 relatively to the carrier 12 by means of mechanism, such as that fully disclosed, for example, in United States Letters Patent No. 889,287, granted June 2, 1908, upon application of E. E. Winkley.

In order to adapt the roll 6 to operate upon the forepart of a turn shoe, for example, with a relatively light pressure, such as will insure against damaging the'upper or displacing the shoe upon the last, and to operate upon the shank of the shoe with a relatively heavy pressure to insure adequate leveling or shaping of that portion of the shoe bottom, the illustrated machine is provided with two independent pressure applying mechanisms one of which comprises two relatively weak springs 26 and 28 arranged to operate in a novel manner to cause the leveling roll to apply the relatively light pressure to the shoe, and the other of which comprises a single relatively strong spring 30, and controlling mechanism therefor, for causing'the roll to apply the relatively heavy pressure to the shoe, the spring 30 and its controlling mechanism being of a construction similar to that of corresponding parts heretofore employed in machines of the illustrated type for applying the leveling pressure.

Referring first to the spring mechanism through which the relatively light pressure is applied to the shoe, the springs 26 and 28 are supported upon two substantially horizontal rods 31 and 32, respectively, the rear portions of which are slidingly received in vertically spaced guideways 34 in a bracket 36 which is fixedly secured to the frame of the machine. The front extremities of the rods 30 and 32 are pivotally connected to theupwardly and downwardly extending arms 38 and 40, respectively, of a three-arm lever or operating member which is pivoted at 42 to the machine frame 18 and the third arm 44 of which is connected by a link 46 with the leveling roll carrier 12. The rod 31 carries two sleeves 48 and 50 which are located within the opposite end portions of the spring 26 and the sleeves 48 and 50 are formed at their outer ends with external annular flanges 52 and 54, respectively, which constitute abutments for the opposite ends of the spring 26. Similarly, the rod 32 carries two sleeves 56 and 58 which are located within the opposite end portions of the spring 28, the sleeves being formed at their opposite end portions with external annular flanges 60 and 62, respectively, which constitute abutments for the ends of the spring 28. The flanged rear ends of the sleeves '50 and 58 are seated upon adjacent bearing faces 64 on the bracket 36. The rods 30 and 32 are-screwthreaded near their forward ends to receive nuts 66 and 68, respectively, which engage the flanged front ends of the respective sleeves 48 and 56 and function to hold the springs 26 and 28 under compression each between its respective abutment flanges. The nuts 66 and 68 constitute means whereby the stresses of the springs 26 and 28 may be adjusted as will hereinafter be described.

Between successive cycles of operation of the machine the leveling roll 6 in the construction herein shown is maintained in a raised position out of cooperative relation with the shoe-supporting jack by means including a cam 72 secured to one side of a cam wheel 74 which is fast on the cam shaft 22. The cam 72 engages a roll 76 carried by a long lever arm 78 which is pivoted on a rod supported by the frame 18. A short lever arm 82 which is-formedintegrally with the long arm 78 carries a roll 84 which is arranged toengage the lower side of the leveling roll carrier 12. When the machine is at rest the high portion of the cam '72 holdsthe lever arms '78 and- 82in the positions shown in Fig. 1 to support the weight of the leveling roll and its carrier and to maintain the roll in raised or inoperative position. Shortly after the start of a cycle of operations of the machine the high part ofthe cam 72 is removed from beneath the: roll 76, thus permitting the leveling roll carrier 12 to drop until the leveling roll engages the 'shoeon the jack, the jack having first been manually swung ashort distance forwardly beyond the position shownin the drawing to position the shoewith its toe portion directly beneath the leveling roll and to connect thejack with its operating mechanismin the usual manner. The above-described downward movement of the leveling roll carrier op'erates'through the link 46-and the lever arm 44 to turn the three- arm lever 38,40, 44 into a position wherein the pivotal connections of the rods 31 and 32 with the lever arms 38 and 40, respectively, are located substantially in the same vertical plane. In this position of the parts just described, if the nuts 66 and 68 are adjusted so that the spring 26 is compressed more than the spring 28, as shown in the drawing, the action of the spring 28 tending toturn the threearm lever in a clockwise direction and thus to raise the leveling roll carrier 12 will be, more than counteracted by the action of the more highly compressed spring 26 with the result that the three-arm lever will be yieldingly urged in a counterclockwise direction and the leveling roll 6 will be pressed upon the shoe with a light pressure corresponding to the difference in stress between the two springs 26 and 28 plus, of course, the force exerted upon the roll by gravity By relatively adjusting the stresses of the springs 26 and 28 by turning one or the other of thenuts66 or 68 the force exerted upon the roll carrier 12 as a result of the joint action of thetwo springs may be varied to cause the roll 6 to exert any desired degree of light pressure upon the shoe. If desired, the nuts 66 and 68 may be adjusted so that when the leveling roll is in engagement with the shoe the two springs 26 and 28 will be subjected to the same degree of compression, in which case the forces exertedby the springs on the three-arm lever and" the leveling roll carrierwill be substantially balanced and the leveling roll will bear upon the shoe with only such pressure as that,

resulting from the weight of the roll and its carrier. Moreover, the adjustment of the nuts 66 and 68.may be made such as to, maintain the spring 28 under an amount of compression sufiiciently greater than that of the spring 26 to counteract the weight of the leveling roll and its carrier so that the leveling roll will exert no pressure upon the shoe. If desired, the nut 68 may be turned to compress the spring 28 still further to cause the leveling roll to be maintained in a raised position out of contactwith the shoe while the forepart of the shoe is located beneath the roll and thus to adapt the machine to operate upon shoes along their shank portions only when the roll is forced down by means hereinafter described, leaving the foreparts of the shoe bottoms to be leveled by a separate, for example, a manual, operation. It will be understood that each of the twin sets of operating instrumentalities will comprise a separate mechanism for applying relatively light pressure to a shoe, including springs 26 tion of the shoe, the single relatively strong.

spring 30 is preferably allowed to remain normally in a fully" expanded condition, i. e., while the leveling roll is operating upon the forepart of the shoe, so as not to affect the light pressure with which the roll is held against the shoe at suchtimes under the joint control of the springs 26 and 28. The spring 30 is maintained under compression, however, during those times when the leveling roll is operating along the shank of the shoe, the means for compressing the spring and for maintaining it under compression .including a cam secured 'to the cam wheel 74. The spring 30 is arranged toapply its pressure to a lever 92 which is pivoted at 94 on the frame of the machine and is connected by a link 96 to the leveling rollcarrier 12. For compressing the spring 30 there is provided a lever arm 98 fast on arockshaft 100 which has also fast thereon an arm 102 connected by a link 104 to a lever 106 pivoted at 108to the frame of the machine and provided with a roll 110 in engagement with the periphery of the cam 90. The lever arm 98 is arranged to bear on ears 112 formed on .opposite sides of a sleeve 114 which is slidingly movable in a holder 116 on the frame of the machine. A rod '118 extending downwardly through the sleeve 114 has screw threads thereon for engagement with corresponding threads in the interior ofthe sleeve 114 and the rod caracted upon by the leveling roll and thus to cause the roll to apply relatively heavy-pressure to the shank portion of the shoe. If the relative stresses of the springs 26 and 28 have been adjusted, as they ordinarily will'be, to cause the light pressure applying mechanism to press the leveling'rolllightly against the shoe, that mechanism will be eifective, in additionto the heavy pressure applying mechanism including the spring 30, to press the leveling roll aginst the shoe during those periods when the roll is operating along the shank portion of the shoe, so thatthe machine is actually adapted to apply a somewhat heavier pressure on the shank portion of the shoe bottom than would be obtained by the action of the spring 30 alone. A hand wheel'122 fast on the upper end of the rod 118 constitutes a means for manuallyturning the rod to adjust the abutment 120 in operative engagement with the spring 30.

Bymeans of the hand wheel 122 the rod 118 may be turned to secure an initial compression of the ,understoodthat each of the twin sets of operat ing instrumentalities will comprise a separate mechanism for applying relatively :heavy pressure to a shoe including a sleeve 30, an abutment 120 and its operating rod 118, and a sleeve 114 as described, together with a separate oper ating arm 98 fast on a common rockshaft 100 operated by a single cam through the parts 102, 104 and 106.

While the invention has been described with particular reference to the leveling of the soles of turn shoes it is to be understood that machines constructed as herein shown are not restricted to that particular use, but are applicable to the leveling or pressing of the bottoms of shoes of other kinds Where conditions may render their use desirable. I

Having 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 applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along the bottom of a shoe on said support, means arranged to act on said device to cause it to apply relatively light pressure to the shoe bottom while operating on one portion thereof, and other means arranged to act on said device in automatically determined time relation to the relative movement of the device and the shoe sup-, port to cause it to apply relatively heavy pressure to the shoe bottom while operating on another portion thereof.

2. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along the forepart and shank portions of the bottom of a shoe on said support, means arranged to act on said device to cause it to apply relatively light pressure to the shoe bottom while operating along the forepart thereof, and other means arranged to act on said device automatically during a portion only of the relative movement of the device and the shoe support to cause it to apply relatively heavy pressure to the shoe bottom while operating on the shank portion thereof.

3. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along the bottom of a shoe on said support, means arranged to act on said device to cause it to apply relatively light pressure to the shoe bottom, and means arranged to operate independently of said first-mentioned means for causing said device to apply increased "pressure to'the shoe bottom while operating along a predetermined portion only thereof.

l. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along the bottom of a shoe onsaid support, means arranged to act on said device to cause it to apply pressure to the shoe bottom while operating along the forepart and shank portions thereof, and other means for supplementing the action of said first-mentioned means during a portion only of the relative movement of the device and the shoe support to cause said device to apply additional pressure while operating on the shank portion of the shoe bottom.

5. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to traverse the bottom of a shoe on said support, means arranged to act on said device to cause it to apply relatively light pressure to the shoe bottom while operating on the forepart thereof, and other means arranged to act on said device to cause it to apply relatively heavy pressure to the shoe bottom while operating on the shank portion thereof, said first-mentioned means being adjustable to render it ineffective so that the machine will operate only on the shank portion of the shoe bottom.

6. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along, the bottom of a'shoe on said support, means including a spring for relatively moving saidsupport and said device heightwise of the shoeto apply pressure to the bottom of the shoe, and means including a second spring for supplementing the action of the first spring while operating along a portion only of the shoe bottom.

7. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying device relatively movable to cause said device to operate progressively along the bottom of a shoe on said support, means including a normally stressed, relatively Weak spring arranged to act on said device to apply relatively light pressure to the shoe bottom and a normally unstressed, relatively strong spring arranged to act on said device to apply relatively heavy pressure to the shoe bottom, means normally supporting said device against pressure applying movement and operable to release said device and permit such movement, and means movable at a predetermined time in the operation of the machine upon the shoe for stressing said relatively strong spring to render it effective to press said device on the shoe.

8. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying .tool relatively movable to cause the tool to operate progressively along the bottom of a shoe onsaid support, a carrier for said tool movable heightwise of the shoe to press the tool upon the shoe with different degrees of pressure, means for moving said carrier to cause said tool to apply relatively light pressure to the shoe bottom while operating on one portion thereof, and other means for moving said carrier to cause said tool to apply relatively heavy pressure to the shoe bottom while operating upon another portion thereof, said other means being arranged to act automatically to increase the pressure at a predetermined time in the relative movement of the tool and the shoe support.

9. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying tool relatively movable to cause the tool to operate progressively along the forepart and shank portions of the bottom of a shoe on said support, a carrier for said tool movable heightwise of the shoe to press the tool upon the shoe with different degrees of pressure, means including a relatively weak spring for moving said carrier to cause said tool to apply relatively light pressure tothe shoe bottom while operating along the forepart thereof, and means including a relatively strong spring for moving said carrier to cause said tool to apply relatively heavy pressure to the shoe bottom while operating only along the shank portion thereof.

10. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying tool relatively movable to cause the tool to operate progressively along the bottom of a shoe on said support, a carrier for said tool movable heightwiseof the shoe to press the tool upon the shoe withdiiferent degrees of pressure, means normally holding said carrier in a raised position and movable to permit lowering of the carrier to position said tool in cooperative relation with the shoe (support, and pressure applying mechanism connectedwith said carrier for pressing said tool upon. the shoe comprising two springs one arranged to urge said carrier upwardly and the other arranged to urge said carrier downwardly, the stresses of said springs being relatively adjustable to cause said tool to eXert' upon the shoe a pressure resulting from the dififeren'ce in stress between the two springs.

'11. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying tool relatively movable to cause the tool to operate progressively along the bottom of a shoe on said support, a carrier for said tool movable heightwise of the shoe to press the tool upon the shoe with. different degrees of pressure, means normally holding said carrier in a raised position and movable to permit lowering of the carrier to position said tool in cooperative relation with the shoe support, pressure "applying mechanism connected with said carrier'for pressing said tool upon the shoe with a relatively light pressure comprising two springs one arranged to urgesaid carrier upwardly and i the otherarranged to urge said carrier downwardly, means for relatively adjusting the stresses of saidsprings to cause said tool to exert upon the shoe a pressure resulting from the difference in stress between the two springs, said means being adjustable to balance the forces exerted by said springs upon said carrier to render said mechanism ineifective to press said tool upon the shoe, and other mechanism for applying relatively heavy pressure to the shoe while operating upon a predetermined portion only thereof.

12. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying'tool relatively movable to cause the tool to operate progressively along the bottom of a shoe on said support, a carrier adjustment to counterbalance the weight of the carrier, and means for relatively adjusting the stresses of said springs to adapt said mechanism to exert varying amounts of downward force upon said carrier or to exert upward force upon said carrier.

13. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying tool relatively movable to cause the tool to operate progressively along the bottom of a shoe on said support, a carrier for said tool movable heightwise, of the shoe to press the tool upon the shoe with diiferent degrees of pressure, a pivoted operating member connected to said carrier, a spring urging said member in a direction to raise said carrier, a second spring urging said member in a direction to lower said carrier, means normally supporting said carrier against the action of said second spring and operable to release the carrier, a normally unstressed spring, operative connections between said unstressed spring and said carrier, andmeans movable at apredetermined time in the operationof the machine upon the shoe for stressing said last-named spring to increasethe pressure of said tool upon the shoe.

14. In amachine for applying pressure to the bottoms of shoes, in combination, a shoe support and a pressure applying tool relatively movable lengthwise of a shoeon said support,ia carrier for said tool movable heightwise of the shoe to press the tool on the bottom of the shoe, a relatively weak spring arranged to urge the carrier downwardly, a second relatively weak spring arranged to urge the carrier upwardly, means for relatively adjusting the stresses of said springs to adapt said tool toapply different amounts of relatively light pressure to the shoe or to apply no pressure to the shoe, means including a cam for normally holding'said carrier in raised position and. operable to release the carrier to the joint action of said springs to permit said tool to operate upon the forepart of the shoe bottom, a relatively strongsprin'g adapted to be maintained in an unstressed condition during operation upon the forepart of. the shoe, said spring being connected with said carrier and arranged to urge the carrier downwardly, and means for stressing said relativelysstrong spring to cause said tool to apply relatively heavy pressure to the shank portion of the shoebottom;

15. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe supporting jack and'a pressure applying roll relatively movable lengthwise of a shoe on said jack, means forthus relatively moving the jack and the roll in a predetermined cycle ofoperations of the machine, a carrier for said roll movable heightwise of the shoeto press the roll. upon the shoe, mechanism operable to :hold said carrier normally in a raised position and to release it at the start; of the cycle ofoperations, mechanism operable upon. therelease of said carrier to force the "latter, downwardly to cause said rollto apply pressure to the shoe, initially inoperative mechanism for also forcing the carrier downwardly to cause said roll to apply a different amount of pressure to the shoe, and means operable at a predetermined time in the cycle of operations of the machine for rendering said last-mentioned mechanism operative.

16. In a machine for applying pressure to the bottoms of shoes, in combination, a shoe supporting jack and a pressure applying roll relatively movable lengthwise of a shoe on said jack, means for thus relatively'movlng the jack and the roll in a predetermined cycle of operations of the machine to cause theroll to operate upon the forepart and shank portions of the shoe bottom, a carrier for said roll movable heightwise of the shoe to press the roll upon the shoe, mechanism operable to hold said carrier normally in a raised position and to release it at the start of the cycle of operations, mechanism operable upon the release of said carrier to force the latter downwardly to cause said roll to apply relatively light pressure to the shoe, initially inoperative mechanism for also forcing the carrier downwardly to cause said roll to apply relatively heavy pressure to the shoe, and means to render said last-mentioned mechanism operative while said roll is operating upon the shank portion of the shoe.

17. In a machine for applying pressure to the tool tooperate progressively along the bottom of the shoe, a carrier'for said tool movable heightwise of the shoe, a lever connected to said carrier, springs arranged to act on said lever respectively at opposite sides of the fulcrum of the lever and tending respectively to move said carrier in opposite directions heightwise of the shoe, and means for relatively adjusting the stresses of said springs to cause the tool to be pressed upon the bottom of the shoe with varying amounts of force resulting from the differences in stress betweeen the two springs.

18. In a machine for applying pressure to the bottoms of shoes, a shoe support and a pressure applying tool relatively movable in directions lengthwise of a shoe on said support to cause the tool to traverse the forepart and shank portions of the bottom of the shoe, a carrier for said tool movable heightwise of the shoe, a lever connected to said carrier, springs arranged to act on said lever respectively at opposite sides of the fulcrum of the lever and tending respectively to move said carrier in opposite directions heightwise of the shoe, means for relatively adjusting the stresses of said springs to cause the tool to be pressed upon the bottom' of the forepart oi: the shoe with a predetermined amount of force resulting from the difference in stress between the two springs, an additional spring arranged to act on said carrier to press the tool upon the bottom of the shoe, and automatic means for subjecting said additional spring to stress only when the tool is operating upon the shank portion of the shoe.

19. In a machine for applying pressure to the bottoms of shoes, a shoe support and a pressure applying tool relatively movable in directions lengthwise of a shoe on said support to cause the tool to traverse the forepart and shank portions of the bottom of the shoe, an upwardly and downwardly movable carrier supporting said tool; means for holding said carrier initially upraised and for releasing it to permit the tool to be carried downwardly into contact with the forepart of the shoe bottom, a spring acting upon said carrier and operative upon the release of the carrier to press'the tool upon the shoe, another spring arranged also to act on said carrier to press the tool upon the shoe, and automatic means for subjecting said other spring to stress to increase the pressure of the tool on the shoe when the tool is operating upon the shank portion of the shoe bottom.

20. In a machine for applyingpressure to the bottoms of shoes, a shoe support and a pressure applying tool relatively movable in directions lengthwise of a shoe on said support to cause the tool to traverse the forepart and shank portions of the bottom of the shoe, acarrier for said tool movable heightwise of the shoe, automatic meansarranged to act on saidcarrier to press the tool upon the shoe only when the tool is operating on the shank portion of the shoe bottom, springs arranged also to-act on said carrier and tending respectively to move it in opposite directions heightwise of the shoe, and means for relatively varying the stresses of said different springs to cause the tool either to be pressed upon the shoe or to be rendered substantially ineffective to apply pressure to the shoe when traversing the forepart of the shoe bottom.

21. In a machine for applying pressure to the bottoms of shoes, a shoe support and a pressure applying tool relatively movable in directions lengthwise of a shoe on said support to cause the tool to operate progressively along the bottom of the shoe, a spring arranged to act constantly to press the tool upon the shoe bottom throughout the operation of the tool on the shoe, another spring for also pressing the tool upon the shoe bottom, and automatic means for subjecting said other spring to stress independently of said firstnamed spring to increase the pressure on the shoe bottom while the tool is operating on a portion only of the shoe bottom.

ERASTUS E. WINKLEY.

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