US2869157A - Rough rounding machines - Google Patents

Description

Jan. 20, 1959 J; 5. LYNESS 2,869,157

ROUGH ROUNDING MACHINES Filed April 25, 1956 5 Sheets-Sheet 1 lnuenzfar v John S. Lyness B Jan. 20, 1959 J. 5. LYNESS 2,869,157

' ROUGH ROUNDING MACHINES Filed Apfil 25, 1956 5 Sheets-Sheet 2 In vemor John 5'. Lyness B his Au Jan. 20, 1959 J. I'LYNE'ss ROUGH ROUNDING MACHINES 5 Sheets-Sheet 5 Filed A ril 25, 1956 A mww R, v G w mm $7 WW I :1 1 i [nveniar Jo/zn .STLyness By his At Jan. 20, 1959 J. s. LYNESS ROUGH ROUNDING MACHINES Filed April 23, 1956 5 Sheets-Sheet 4 va wlc 9% L g Q 3 QQN lnvemor Jo/zn S. Lyness By his Attorney 20, 1 959 Y 5, LYNESS 2,869,157

ROUGH ROUNDING MACHINES Filed April 23, 1956 5 Sheets-Sheet 5 Machinery Corporation, Flemington, N. 5., a corporation of New Jersey Application April 23, 1956, Serial No. 580,099

9 Claims. (Ci. 12-85) This invention relates to rough rounding machines and is illustrated herein as embodied in a gage mechanism of the type disclosed in United States Letters Patent No. 2,820,976, granted on January 28, 1958, upon an application of Gerald W. Cleversey et al.

In a typical automatic rough rounding machine embodying the above-mentioned Cleversey et al. gage mechanism, a shoe and a tool head are moved relatively t" each other progressively to cause a rounding out to be made about the periphery of the sole. The sole edge extension formed by the rounding cut is under the control of agage which ordinarily positions the tool head relatively to the shoe throughout the rounding cut. However, in the case of certain shapes of shoes the sole edge extension, if determined by this gage alone, would become too narrow, particularly in the inner shank portion of the shoe.

Accordingly, there is provided, by the above-mentioned Cleversey et al. invention, a welt supporting guide which, although normally inactive as a guide, is continually biased into engagement with the shoe upper until the rounding out reaches the vicinity of the inner ball line and then is locked relatively to the tool head to become efi ective as a guide while the inner shank is rounded so that the sole edge extension in the inner shank cannotbe any less than it is where the locking of the guide first takes place. Thus, provision has been made for preventing the formation of an excessively narrow sole edge extension because of a tendency of the above-mentioned gage, in some cases, not to compensate for abnormal narrowness of a shoe.-

in some classes of work, as when the sole edge extension is relatively narrow in the forepart, the use of the above-mentioned guide may not prevent the formation of an excessively narrow sole edge extension in the shank where, because of the overhanging portion of the upper, a sole edge extension which is the same as that at the ball line will appear to be smaller.

in view of the foregoing, it is an object of the invention to make provision, in a gage mechanism of the type referred to above, for insuring that the sole edge extension formed in the inside shank portion of the shoe will not be any less than a predetermined permissible minimum.

To this end, and in accordance with one feature of the invention, there is provided in the gage mechanism disclosed herein, with a gage for relatively positioning a tool head and a shoe to control the sole edge extension formed by the rounding cut and also a guide which is yieldingly maintained in engagement with the shoe, the combination of means for preventing movement of the guide upon the tool head away from the shoe throughout a predetermined stage of the rounding out, and means for advancing the guide toward the shoe, during said stage, into a predetermined position corresponding to the minimum permissible sole edge extension. With this con struction, if either the shape of the shoe or the position ice 2 of the guide when it is locked would tend to result in an excessively narrow sole edge extension in the inner shank, the guide will be advanced far enough toward the shoe to insure that'the sole edge will be formed with the minimum permissible extension, at least.

Such operation of the illustrative guide is made possi ble, in accordance with a further feature of the invention, by mounting the guide for limited movement toward the shoe upon a carrier for the guide which is locked against movement with respect to the tool head upon the entry of the rounding cut into the inside shank portion of the shoe. Thus, movement of the guide with respect to the tool head away from the shoe while the carrier is locked is prevented and yet the guide may be advanced toward the shoe far enough to insure that the desired amount of sole edge extension will be formed.

The above and other objects and features of the invention will next be described in the following detailed description of an illustrative embodiment of the invention and will be defined in the appended claims.

n the drawings,

Fig. 1 is a side elevation of the tool head of a rough rounding machine embodying the invention, as viewed from the left;

Fig. 2 is a side elevation of the gage mechanism shown in Fig. 1, but at an enlarged scale;

Fig. 3 is a sectional front elevation, the section being taken along the line IIIIII of Fig. 2;

Fig. 4 is a plan view of the structure shown in Fig. 2 certain parts of which have been broken away and shown in section;

Fig. 5 is a sectional elevation of structure shown in Fig. 4, the section being taken along the line V-V;

Fig. 6 is a plan view showing the mounting of and operating means for the welt supporting guide;

Fig. 7 is a sectional elevation of the structure shown in Fig. 6, the section being taken along the line VIIVII;

Fig. 8 is a sectional rear elevation of a portion of the structure shown in Fig. 7, the section being taken along the line VIIIVIII; v

Fig. 9 is a diagrammatical plan view illustrating the relation of the shoe and the tool head at certain critical points in the rounding cut;

Fig. 10 is a sectional elevation illustrating the relation of the tool head and the shoe when the rounding cut is at the inner ball line, the section being taken along the line XX in Fig. 9; and

Fig. 11 is a sectional elevation illustrating the relation between the tool head and the shoe when the rounding cut is at the inner shank portion of the shoe, the section being taken along the line XIXI in Fig. 9.

A machine in which the structure disclosed herein may be embodied is fully disclosed in United States Letters Patent No. 2,825,076, granted on March 4, 1958, upon an application of Gerald W. Cleversey, to which reference may be made for a complete understanding of the parts of the illustrative machine which are common to this and to the prior machine. These parts include a chopping knife 10 (Figs. 1 and 5) which is fixed upon a plunger 12 mounted to reciprocate vertically in a frame 14 of the tool head. A shoe S to be rounded is presented, bottom up, to the knife 1% with the upper surface of its welt, or the corresponding surface of the shoe if it is not a welt shoe, seated upon an anvil 16 and a welt supporting guide 18, the upper surface of the anvil and guide being flush with each other. The anvil is integral with a plate 20 which is fixed to the frame 14. The shoe is urged against the anvil and guide by a bottom rest 22 which is spring biased downwardly and may be retracted into its inactive position by moving a handle 24 rearwardly.

A shoe to be rounded is supported upon an automatically operated jack (not shown herein, but fully disclosed in the above-mentioned Cleversey patent) to which is imparted a gyratory movement to cause the periphery of the shoe to be progressively presented to the knife in a direction which is always tangent to the periphery of the shoe at the point of operation of the knife thereupon.

The amount of the sole edge extension is controlled, during the greater portion of the rounding cut, by a wing gage 26 comprising right and left wings 28, 30 (Figs. 4 and 5) which are so shaped and mounted as to be capable of presenting either a concave or convex work-engaging surface to the work, as appropriate for the contour of the work where it is being operated upon. The gage wings 28, 30 are automatically moved between their extended and collapsed relations, as indicated by broken and solid line showings, respectively, of these parts in Fig. 4, and the gage 26 is moved bodily relatively to the knife to vary the sole edge extension formed by the rounding cut under the control of gage operating means which is fully disclosed in the above-mentioned Cleversey et al. patent.

These movements of the gage are effected in synchronism with movement of the jack under the control of cams 32, 34 which are fixed upon a cam shaft 36 which is continuously rotated in synchronism with and is connected to the driving mechanism for the jack. The wings 28, have hollow telescoping shanks which are mounted to rotate freely upon each other and with respect to a slide 38, the latter being mounted to slide longitudinally thereof in ways formed upon the plate 20 (Fig. 3) and by gibs 40 which are secured to the plate 20. The slide 38 is constantly biased rearwardly by a spring 42 (Fig. 2), stretched between the slide and the left-hand gig 40 so as to maintain a roll 44 constantly in engagement with' the cam 34. The roll 44 is carried by a slide 46 which is mounted for adjustment upon the slide 38 radially of the cam 34, under the control of a screw 48 which is threaded into the slide 38 so as to vary the setting of the gage 26 relatively to the knife 10 for the purpose of varying the normal sole edge extension.

When a rounding operation is started, the periphery of the cam 34 is engaged by the roll 44 at the radius A (Fig. 4) and at this time the knife operates upon the sole at the outer shank of the shoe near the ball line. For each cycle of operation of the machine the cam 34 makes one complete, revolution and in doing so presents portions of varying radii to the roll 44, whereby the gage 26 is variably positioned according to the different amountsof sole edge extension which the shoe is to have at diiferent points about its periphery. The illustrated gage 26 is designed to position the tool head and shoe throughout the entire rounding operation by continual engagement with the shoe along one contour at a constant distance above the welt, whereby the well-known difiiculties of effecting an interchange of a crease guide, engaging the shoe at one level, and of a forepart gage, engaging the shoe at a different level, are avoided.

The wings 28, 30 are held in and moved between their extended and collapsed relation by connections which are fully disclosed in the above-mentioned Cleversey et al. patent and are operated by the above-mentioned cam 32. Briefly, these connections include links 50, 52 which connect the Wings 28, 30 with cranks 54, 56, respectively, the latter having hollow telescoping shanks which are rotatably mounted upon each other and within the slide 38. Oppcsitely inclined slots 58, (Fig. 5), formed in the shanks of the cranks, receive a cross pin 62 which is carried by a U-shaped plunger 64 mounted to reciprocate vertically in the slide 38. The plunger 64 is operated by a crank 66 which is fixed to a shaft 68 rotatably mounted in the slide 38. An extensible shaft 70 (Figs. 3 and 4) has a forward part associated with the slide 38 and connected to the shaft 68 by bevel gearing 72. The re rward.

portion of the shaft 70, which is rotatably mounted upon an extension of the plate 20, is connected by bevel gearing (not shown) to another shaft 74 which is mounted to rotate upon a bracket 76 which is fixed to the plate 20. Upon the upper end of the shaft 74 there is fixed an arm 78 which carries a roll 80 arranged to run upon the cam 32. A spring 82, stretched between an arm 84, fixed to the rear section of the shaft 70, and a bracket 86 fixed to the plate 20, causes the roll 80 always to be biased against the cam 32.

As the rounding out proceeds from its starting point at the outer shank portion of the shoe, a rising slope on the cam 32 between the radii A and B causes the gage Wings 28, 30 to be moved into their fully extended relation, in which they present a concave work-engaging surface to the work, as shown in broken lines in Fig. 4, and in time to accommodate the convex portion of the shoe upper beginning just before the outer ball line is reached. Throughout the period when the rounding cut is trans ferred about the fore-part of the shoe, a concentric portion of the cam 32, between radii B and C, is presented to the roll 80, the gage wings now being held in their fully extended relation until the rounding cut reaches the inner ball line. At this time, the radius C of the cam 32 passes the roll 80 and a falling slope on the cam causes the gage wings 28, 30 to be moved into their fully collapsed relation as the rounding cut passes the more deeply recessed portion of the inside shank, this stage of the rounding out being illustrated by Fig. 11. As the next rising slope on the cam 32, between the radii C and D, is presented to the roll 80 the rounding out emerges into the heel part of the shoe, the contour of which is convex, and the gage wings are now moved into their fully extended relation which is maintained while the portion of the cam, between the radii D and E, is presented to the roll 80. During this period, the rounding cut is transferred around the heel end of the shoe and, when the rounding out proceeds into the concave portion of the outer shank of the shoe a falling slope beyond radius E on the cam 32 is presented to the roll 80 and causes the gage wings 28, 30 to be moved into a partially collapsed relation, appropriate for the moderate concavity of the outside shank portion of the shoe. Just before the cycle of operation of the machine is completed, a rising slope on the cam 32, leading up to the radius A, is presented to the roll 80 causing the gage wings to be moved part way toward their extended relation.

Throughout the rounding operation, the gate 26 swings freely in response to the bearing pressure between it and the shoe regardless of whether the gage wings are in their extended or collapsed relations and without affecting the relation of the gage wings with respect to each other.

Throughout the rounding operation, except when the rounding cut passes through the inner shank portion of the shoe, the above-mentioned welt supporting guide 18 is biased into yielding engagement with the side of the shoe upper contiguous to the welt crease by a spring 88 (Fig. 2) which abuts a lug 9% which is fixed upon a carrier 92 (Fig. 3) for the guide, the carrier being mounted to slide freely lengthwise thereof in a recess between the plate 20 and the slide 38. The spring 88 encircles a stud 94 which slides within the lug and yieldingly abuts an adjusting screw 96, the latter being threaded in a bracket 98 fixed upon the slide 38.

It will now be understood that, as the rounding cut proceeds around the shoe making a variable sole edge extension under the control of the cam 34, the guide 18 and carrier 92 moves together relatively to the cutter 10 toward and away from the shoe as the sole edge extension diminishes and increases, respectively, the guide always being maintained in engagement with the shoe upper by the above-mentioned spring 88. However, when the rounding out reaches the vicinity of the inner ball line of the shoe (Fig. 10) the carrier 92 is fixed to the plate 20 for a predetermined period by a pair of brake shoes 100 QFig'. 4) which are received in slots in the plate 20 and frictionally engage the inner sides of the carrier 92. The brake shoes are held in locking engagement with the carrier 92, while the rounding cut traverses the inner shank portion of the shoe, by a cam 102, fixed upon the lower side of the cam 32, and the following connections.

A bar 106, mounted to slide in grooves in the plate 20 (Figs. 3, 4 and 5), carries upon its rearward end a roll 108 which engages the cam -2, the bar being biased into engagement with the cam by a spring 110 which is compressed between the bar and a plate 112 fixed upon the rear end of the plate 20. A stud 114 extending through the spring 110 and fixed upon the plate 112 limits rearward movement of the bar 106. In a T-slot formed in the bar 106 there is slidably mounted a member 116 the forward end of which carries a pin 118 upon which are pivotally mounted a pair of toggle links 120. These links are pivotally connected at their outer ends to the abovementioned brake shoes 100. Except when the roll 108 is displaced by the cam 102, the bar 106 is held in its rearward position by the spring 110, this position being determined by the stud 114. At this time also, the member 116 is positioned to collapse the links 120 enought to prevent the brake shoes 100 from exerting any pressure on the carrier 92 by the engagement of a stud 122, fixed upon 'the member 116, with the bar 106 at the forward end of :a slot formed in the bar. However, when the roll 108 is displaced by the cam 102 the bar 106 is moved forwardly and, through a spring 123 compressed. between the :forward end of the member 116 and a socket for the :spring formed in the bar 106, yieldingly advances the member 116 so as to cause the brake. shoes100 to grip the carrier 92, whereby the carrier is immobilized as long as the cam 1112 engages the cam roll 108. The carrier 92 is thus locked against movement for a period beginning when or shortly before the rounding out passes the inner Zball line and continuing until the rounding out has passed through the concave portion of the inside shank of the shoe. Any excess forward movement of thebar 166 relatively to the member 116, over that necessary to cause the shoes 100 to apply braking pressure to the carrier 92, is permitted by the clearance, to the rear, between the stud 122 and the slot in the bar 1116 which receives the stud.

Except for the fact that the welt supporting guide 18, in the present machine, is mounted upon the carrier 92 for limited movement relatively thereto toward and away from the shoe, instead of being fixed upon the carrier, the above-described structure is the same as that disclosed in the prior Cleversey et al. patent, to which reference may be made for a more complete description of the parts referred to above.

By locking the guide 18in the position it occupies when or just before the rounding out passes the inner ball line (Fig. 10) it is assured that the sole edge extension will be no less in the inner shank than at the ball line. Thus, if because of an abnormality in the form of the shoe the gage 26 would permit the sole edge extension to be too small, the guide 18 will, in most cases, not allow this to happen. However, in. some classes of work the sole edge extension in the shank controlled by the guide 18 would be too small and to provide for this contingency the guide 18, in the present machine, instead of being fixed upon the carrier 92, as in the prior machine, is mounted in grooves 124 (Fig. 3) in the carrier for limited sliding movement thereon relatively to the knife toward and away from the shoe. Rearward movement of. the guide 18 relatively to the carrier is limited by a pair of pins 125, 125 (Figs. 6 .and 7) which are received in elongated slots in the sides of the guide 18 and normally bear against the guide at the forward ends of the slots. The sides of the guide are connected at their rear ends by a yoke 126 upon which is adjustably fixed a bar 128 carrying a roll 130 which is mounted in thepatlr of a cam 132, the latter being mounted upon the upper side of the earn-32. Integral with the yoke 1 26 there is a slide 134 which is 6 mounted to move freely lengthwise thereof in a recess iii the frame 14 immediately above the plate 20.

The cam 132 is so shaped, that is, its radius is great enough, that for any shoe the guide 18 will be advanced sufiiciently (as shown, for example, in Fig. ll) to insure that the sole edge extension at the inner shank of the shoe will be no less than the permissible minimum. If, when the carrier 92 is locked the guide 18 will have been positioned so that it will cause the sole edge extension in the inner shank to be equal to or greater than the permissible minimum, tr e cam 132 will either touch the roll 130 without displacing it or will not engage the roll 130 at all. In either of these cases the cam 132 has no effect upon the positioning of the guide 18 or the sole edge extension.

Provision for adjusting the position of the guide 18, as controlled by the cam 132, is aiforded by adjusting the bar 128 relatively to the yoke 126. To this end a screw 136*, which passes through an elongated slot in the bar 128 and is threaded into the yoke 126, may be backed away from the bar 128 permitting the guide 18 to be advanced or retracted in order to increase or diminish, respectively, the sole edge extension which is determined by the cam 132.

The use and operation of the illustrated gage mechanism will now be briefly summarized. At the beginning of a cycle of operation of the machine, the roll is engaged by the cam 32 at the radius A, the wings 28, 30 being in a partly collapsed relation and engaging the shoe at the outer shank portion thereof. As the portion of the cam 32 between the radii A, B is presented to the roll 80, the wings 28, 30 are moved toward their fully extended relation. The wings are held in this relation while the concentric portion of the cam 32 between the radii B, C is presented to the roll, and during this period, because of the varying radius of the cam 34, a variable sole edge extension will be formed upon the sole edge around the forepart, according to the style requirements of the shoe. Because the brake shoes exert no gripping pressure upon the carrier 92 at this time, the welt supporting guide 18, being held constantly in engagement with the side of the shoe by the spring 88, moves in and out of the tool head in accordance with the move ment of the shoe toward and away from the knife 10 which is erfected by the action of the gage 26.

Where, near the inner ball line, the curvature of the shoe and sole edge changes from convex to concave, the portion of the cam 32 at the radius C passes the roll 80 and because of the falling slope of the cam just beyond the radius C, the wings 28, 30 are moved into their fully collapsed relation (Fig. 11) as the rounding out passes into the more deeply recessed portion of the inner shank. Shortly after the portion of the cam 32 at the radius C is presented to the roll 80, the cam 102, acting upon the roll 1128, causes the brake shoes 100 to apply locking pressure to the carrier 92, whereby the latter is locked to the plate 20 until the cam 102 leaves the roll 108, just before the radius D on the cam 32 is presented to the roll 80.

It thus is evident that the carrier is maintained, throughout the period in which it is locked, in the position it had when the locking action took place in the vicinity of the inner ball line. Therefore,- the sole edge extension in the inner shank can be no less than it is at the inner ball. line.

In some classes of work, the guiding of the tool head may be effected in the inner shank by the gage 26, andin such cases the guide 18 has only a welt supporting function. In other examples of work, however, particularly when the shoe is slimmer than it should be in the shank, the gage 26 might permit the tool head to advance far enough toward the shoe to cause the guide 18 to engage the shoe upper. In such a case, the control of the tool head is taken over by the guide.

In various classes of work requiring a moderate or relatively wide sole edge extension at the inner ball line,

or where the locking of the carrier 92 takes place, the sole edge extension in the inner shank, as determined by the guide 18, may be at least as great as the permissible minimum extension. However, if the sole edge extension near-the inner ball line is narrow, and the guide 18 is locked in a Corresponding position, the sole edge extension formed in the inner shank under the control of the guide 18 may be less than the permissible minimum.

In order to avoid such an occurrence, the cam 132 causes the guide 18 to be advanced toward the shoe into a position (Fig. 11) corresponding to the minimum permissible extension, at least, such movement of the guide being permitted by the clearance between the pins 125 on the carrier 92 and the rearward ends of the slots in the guide which receive the pins.

If, when the guide 18 is locked, it occupies a position corresponding to or greater than the minimum permissible extension in the inner'shank, the roll 130 will be disposed outside of the path of the earn 132 and will not be affected by the cam.

As the rising slope on the cam 32 in advance of the radius D is presented to the roll 80, the wings 28, 30 are moved into their fully extended relation in time for the gage 26 to present a concave work-engaging surface to the shoe when its contour becomes convex in the heel part. During this transition, the cams 102, 132 depart from the rolls 108, 130, respectively, allowing the guide 18 to resume its normal retracted position with relation to the carrier 92 and causing the unlocking of the carrier. From this time on throughout the remainder of the cycle, the guide 18 is biased against the shoe by the spring 88 without having any work guiding effect so far as the sole edge extension is concerned. While the portion of the cam 32 between the radii D, E is presented to the roll 80, the rounding cut is transferred about the heel end of the shoe and, when the curvature of the shoe straightens and becomes concave, upon the approach of the rounding out to the outer shank of the shoe, the wings 28, 30 are moved to a partially collapsed relation by the falling slope on the cam 32 beyond the radius E. Finally, just before the end of the cycle a rising slope on the cam 32, in advance of the radius A, causes the wings 28, 30 to be moved part way toward their extended relation in readiness for the succeeding cycle of operation of the machine.

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 rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and a guide, said guide being mountedupon said head for movement toward and away from the shoe and being biased into engagement therewith whereby said guide is positioned relatively to said gage under the control of the shoe, means for preventing movement of said guide away from the shoe throughout a predetermined stage of the rounding cut, and means for advancing said guide toward the shoe into a predetermined position during said stage.

2. In a rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a carrier mounted upon said head for yielding movement toward and away from the shoe, a guide mounted upon said carrier for movement relatively thereto toward the shoe, means for preventing movement of said carrier and guide with respect to said tool head away from the shoe during a predetermined stage of the rounding cut, and means for advancing said guide toward the shoe during said stage.

3. In a rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a guide and a carrier upon which said guide is mounted for movement toward the shoe, said carrier being mounted upon said tool head for yielding movement toward and away from the shoe whereby said guide is biased against the side of the shoe upper, means for locking said carrier against movement upon said tool head during a predetermined stage of the rounding cut, and means for advancing said guide during said stage toward the shoe relatively to said carrier.

4. In a rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a guide and a carrier upon which said guide is mounted to slide toward the shoe, said carrier being mounted upon said tool head to slide toward and away from the shoe, means for biasing said carrier toward the shoe whereby said guide is yieldingly held in engagement with the side of the shoe upper, means for locking said carrier against movement upon said tool head throughout a predetermined stage of the rounding cut, and means for advancing said guide during said stage relatively to said carrier toward the shoe into a predetermined position with respect to said tool head.

5. In a sole rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding cut made by the tool head upon the sole about the periphery thereof, means for positioning said tool head relatively to the shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and guide, said guide being mounted for yielding movement into engagement with the shoe upper whereby it is positioned upon said tool head according to the position of the tool head determined by said gage, means for locking said guide throughout a predetermined stage of the rounding cut against movement upon said tool head away from the shoe, and means for moving said guide .during said stage toward the shoe into a predetermined position.

6. In a rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding out made by the tool head upon the sole about the periphery thereof, means for positioning said tool head relatively to the shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and a welt supporting guide, a carrier upon which said guide is mounted for movement toward the shoe, said carrier being mounted upon said tool head for yielding movement toward the shoe whereby said guide is biased against the shoe upper contiguous to the welt crease, means for locking said carrier against movement upon said tool head while the rounding cut traverses the inner shank portion of the shoe, and means for moving said guide relatively to said carrier toward the shoe while said carrier is locked.

7. In a rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding cut made by the tool head upon the sole about the periphery thereof, means for positioning said tool head relatively to the shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and a welt supporting guide, a carrier, said guide being mounted upon said carrier for yielding movement into engagement with the shoe upper whereby it is positioned upon said tool head according to the position of the tool head determined by said gage, means operated in timed relation to the entry of the rounding cut into and its departure from the inside shank portion of the shoe for locking said carrier to and unlocking it from said tool head respectively, and means operated while the rounding cut traverses the inner shank portion of the shoe fgr moving said guide relatively to said carrier toward the s 0e.

8. In a rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and guide, a carrier upon which said guide is mounted for movement toward and away from the shoe, means for limiting movement of said guide upon said carrier away from the shoe, said carrier being mounted upon said tool head for yielding movement toward the shoe whereby said guide is biased against the shoe upper, means for locking said carrier against movement upon said tool head throughout a predetermined stage of the rounding cut, and means for moving said guide relatively to said carrier toward the shoe while said carrier is locked.

9. In a rough rounding machine in which a tool head and a shoe are moved relatively to each other progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, means for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said means comprising a gage and guide, a carrier upon which said guide is mounted for movement toward and away from the shoe, pin and slot connections between said guide and carrier for limiting movement of said guide upon said carrier away from the shoe and for permitting free movement of said guide upon said carrier toward the shoe, means for biasing said carrier toward the shoe whereby said guide is yieldingly held against the side of the shoe upper, means operated in timed relation to the progress of the rounding out about the shoe for locking said carrier upon said tool head, and means for moving said guide relatively to said carrier toward the shoe While said carrier is locked.

References Cited in the file of this patent UNITED STATES PATENTS

Images