US2152646A - Heel press and method of pressing heels - Google Patents

Description

April 4, 1939. w. HUBBARD 2,152,645

' HEEL PRESS AND METHOD OF PRESSING HEELS Filed Jan. 28, 1957 5 Sheets-Sheet 1 A/VEA/ITUFK W W April 4, 1939. w. HUBBARD I HEEL PRESS AND METHOD OF PRESSING HEELS 3 Sheets-Sheet 2 Filed Jan. 28, 1937 A ril 4, 1939, w, BBARD 2,152,646

HEEL PRESS AND METHOD OF'PRESSING HEELS Filed Jan. 28, 1957 3 Sheets-Sheet 3 V 86 v FM II III m I Q /r\ 3 I I 6 Fig.5. 13

' ivvEA/TU Patented Apr. 4, 1939 HEEL PRESS AND METHOD OF PRESSING HEELS William Hubbard, Dclgeville, N. Y., as'signor to United Shoe MachineryCorporation, Paterson, N. J., a corporation of New Jersey Application January 28, 1937, Serial No. 122,811

11 Claims.

This invention relates to the manufacture of heels and more particularly to the pressing of freshly built, pasted heels, including both an improved machine and an improved method of operation for which the machine is especially adapted.

It is an object of the invention to provide, for the rapid and continuous pressing of freshly built heels, an improved machine and method of operation by the employment of which a very superior product will be obtained with a minimum of labor and attention on the part of the operator.

It is already known that if a limited amount of paste is applied to a series of heel lifts and the lifts are then assembled into a heel a satisfactory product can be secured and a large amount of time can be saved by immediately subjecting the freshly built heel to extremely heavy pressure for a very short time, in some cases even as short as fifteen seconds, provided a suitable quick-drying paste is used. The pressure required, however, is so great that heavy, relatively expensive machinery is required.

I have discovered that heels of even better quality can be obtained, in a short time, with considerably less pressure by increasing the duration of the pressure application, for example, to a plurality of minutes of time while applying the pressure uninterruptedly in progressively increasing amounts and I have, accordingly, embodied in the machine of my present invention the combination of a heel pressing device and operating means for causing said device to apply uninterrupted progressively increasing pressure to a heel throughout a substantial period of time,

The illustrated machine includes a series of heel pressing devices mounted upon a movable carrier, in combination with means for causing each of said devices to apply uninterrupted, progressively increasing pressure to a heel contained therein throughout the. time required to load other pressing devices of the series. Preferably, 5 the pressure is applied yieldingly in order that there shall be no opportunity for the lifts to spring back and impair the strength of the joints between them during the time the paste is setting.

As shown, the carrier is mounted for rotation and a stationary cam coacts with telescopic spring-expanded plungers in the pressing devices to cause each pressing device to grip a heel as it leaves a loading station and apply progressively increasing pressure to the heel until that pressing device again approaches the loading station.

In its method aspect the invention comprises subjecting a freshly built heel to pressure which is maintained uninterruptedly and is progressively increased while the paste in the heel is drying.

These and other features and advantages of the invention will be better understood and appreciated from the following detailed description of an illustrative machine and the method of its use, to be read in connection with the accompanying drawings, in which Fig. 1 is a view in side elevation, partly in section, of a heel press;

Fig. 2 is a front view of the press and the mechanism for imparting rotary movement to the carrier;

Fig. 3 is a plan view of a detail of the movement transmitting mechanism;

Fig. 4 is a front view, partly diagrammatic, showing the arrangement of parts of the pressing devices upon the carrier, and

,Fig. 5 is a plan view of the pressure cam.

Referring to Figs. 1 and 2, I0 indicates a stationary base or frame which may be the frame of a heel building machine such, for example, as that of my copend-ing application Serial No. 122,810, filed concurrently herewith.

Secured to the frame In by bolts I2 is a base member M which may be cast integrally with a heavy casing IS in which are mounted ball bearings I8, 20. Journaled in these bearings is a heavy horizontal shaft 22 upon the front end of which is mounted a vertically disposed disk 24 provided with a keyway 26 which engages a key 28 secured in the shaft 22. This mounting of the disk 24 permits it to slide axially along the shaft but forces it to rotate with the shaft.

In order to provide for axial adjustment of the disk along the shaft the end portion of the shaft is threaded at 30 to receive an adjusting nut 32 having handles 34 by which it may be turned. The periphery of the nut 32 is provided with an annular collar 36 which is kept in engagement with the end of the hub portion 38 of the disk 24 by shouldered retainers 40 secured to the latter by screws 42.

A spider 44 is fixed to the shaft 22 by the key 28 and a set screw 46 which not only secures the spider in place upon the shaft but also prevents movement of the key relatively to the shaft.

The spider 44 carries a series of eight identical heel pressing devices, one of which will now be described in detail.

Mounted to slide parallel to the axis of the shaft 22 in a rectangular recess 48 in the spider is a block 50 which is retained and guided in the recess by a cover plate 52 secured in place by screws 54.

Pivoted by a bolt 56 to a bracket 58 on the block 50 (see Figs. 1 and 4) are two ears 60 which extend rearward from a vertically disposed presser plate 62 the angular position of which, relatively to the vertical, may be adjusted by means of a stop or bolt 64' threaded into the block 50 and secured in adjusted position by a lock nut 66.

Mounted upon the vertical face of the presser plate 62 is a gage 68, for the rear of the heel, which extends far enough forward into the space between the plate 62 andthe disk 24 to permit a heel to be placed loosely upon it, as shown in broken lines in Fig. 1, and to prevent the heel from dropping out of position before it is gripped,

by the pressing device. The gage 68 is secured to the edge of the plate 62 by a bolt I passing through a slot 12 in the side portion of the gage and permitting vertical adjustment of the gage to accommodate heels of different sizes.

Also slidably mounted in the recess 48 is a block 14 of which the front end is recessed at 16 to receive a boss I8 extending rearward from the block 50. A heavy spring 80 is interposed between the blocks 50 and I4 and held under compression by a bolt 82 which is threaded into the block 50'and has a sliding fit in the block I4. It will be seen that the blocks 50, 14 and the spring 80 constitute a telescopic pressure plunger by means of which fairly heavy pressure-may be transmitted yieldingly to a heel blank positioned between the plate 62 and the disk 24.

Journaled upon a pin 84 in the rear end of the pressure plunger block 14 is a cam roll 86 which bears against an open, stationary, circular cam 68 secured by screws 90 to the stationary casing I6. The cam 88 has a low portion at the top, which may be designated as the loading station, at which ,position suflicient space will exist between the presser plate 62 and the disk 24 to receive a heel blank freely when the disk is properly, adjusted longitudinally of the shaft 22 for heels of that height. I The carrier is designed to be rotated in a vertical plane in the direction indicated by the arrows on Figs. 2 and 4, that is to say, counterclockwise, as viewed from the front, and the cam 68 is so designed that it rises gradually in the same counterclockwise direction through approximately 315 so that as the carrier is rotated stepby-step a heel in any given pressing device is gripped between the plate 62 and the disk 24 as that device leaves the loading station and is subjected to an uninterrupted, progressively increasing, yielding pressure until it has traveled through A; of the circuit back to the loading station. In other words, progressively increasing pressure is applied to the heel while seven succeeding heels are being built and loaded into the press.

In the last 45 of movement of the pressing de- 7 a vice back to the loading station, the pressure is released and when the heel reaches the loading station it may be removed and a fresh heel inserted.

The rotary carrier may be turned step-by-step, 45 at a time, by any suitable means but it is herein illustrated as connected to and operated from the heel building machine of my copending application hereinbefore referred to. g I

Referring to Figs. 1,2 and 3, 92 indicates a cam tion.

which makes one complete revolution in each cycle of operation of the heel building machine. Secure-d to a rock shaft 94 journaled in the frame I0 of the heel building machine is a cam lever 96 carrying a cam roll 98 arranged for engagement with the cam 92. Also secured to the shaft 94 is a short rocker arm I00 which is pulled downward by a spring I02 to hold the roll 98 in engagement with the cam. An arm I04 is mounted loosely upon the shaft 94 and has an arcuate slot I 06 through which passes a bolt I08 arranged to clamp the arm I04 to the rocker arm I00 but to permit relative angular adjustment between the two arms around the axis of the shaft 94.

Pivoted at I I 0 to the outer end of the arm I04 is an arm I I2 the projecting lower'end N4 of which is drawn toward the frame I0 by a spring H6. Mounted in the upper portion of the arm H2 is .a pin H8 arranged to engage teeth I20 formed upon a ratchet drum I22 which is aflixed to the shaft 22 by a key I34 and a nut I26 (see Figs. 1 and 2).

A second pin I28 mounted in the arm H2 is arranged to engage a series of lugs I30 which project from the face of the drum I22 and prevent any overthrow of the drum when the end of one step in its rotating, movement is completed. It will be observed that the back faces I32 of the ratchet teeth I20 are substantially parallel to the front face of the corresponding lugs I30 so that upon the return stroke of the arm I I2 the pin H8 will slide down the back face I32 of a ratchet tooth and the pin I 28 will slide down the front face of a lug I30 until it passes off said lug and is in position to be engaged by the front face of the next succeeding lug in the next step of rotation.

From the foregoing description it will be apparent that the illustrated mechanism merely produces a power operated step-by-step rotation of the heel press, 45 at a time, in synchronism with the operation of the heel building machine. The motion of the heel press, however, may equally well be efiected manually or by manually controlled power operated mechanism independently of the operation of the heel building machine.

In order to insure the opening of each heel pressing device when it reaches the loading Sta-- tion the cam roll pin 84 is extended downward, as shown at I34 in Fig.1, and is arranged to engage a stationary cam I36 which is mounted upon the casing I6 and so disposed as to insure the retraction of the pressure plunger at the loading sta- In the operation of the press, each freshly built heel, as it is taken from the heel building machine, is placed against the gage 68 in the position shown in broken lines in Fig. 1. Then, while the heel building machine is being operated to build the next heel, the pressis rotated 45, the heel being gripped between the plate 62 and the disk 24 by reason of the cam roll 86 riding up on the. cam 88. The press stops with the next pressing device open at the loading station ready for removal of the finished heel and insertion of the next freshly built heel produced by the heel building machine. As any given heel in the press proceeds around the circuit it is held uninterruptedly under yielding pressure which is progressively increased until the heel reaches the last station preceding the loading station and the result ordinarilyfwill be that the heel will have been kept under pressure for two or three minutes, or possibly slightly more, depending upon Having described the invention, what is claimed as new and desired be secured by Letters Patent 1. In a heel press, the combination of a heel pressing device and operating means for causing said device to apply uninterrupted, progressively increasing pressure to a heel throughout a considerable period of time.

2. In a heel press, the combination of a movable carrier, a series of heel pressing devices mounted thereon, and means for causing each of said devices to apply uninterrupted, progressively increasing pressure to a heel contained therein throughout the time required to load other pressing devices of the series.

3. In a heel press, the combination of a. movable carrier, a series of heel pressing devices mounted thereon and movable in succession through a loading station, and means for causing each pressing device to apply uninterrupted, progressively increasing pressure to a heel contained therein while a plurality of succeeding pressing devices of the series are passing through the loading station.

4. In a heel press, the combination of a heel pressing device and operating means for causing said device to apply uninterrupted, progressively increasing, yielding pressure to a heel contained therein throughout a plurality of minutes of time.

5. In a heel press, the combination of a rotatable carrier, a series of heel pressing devices mounted thereon, means for rotating the carrier step by step tobring the pressing devices successively to rest at a loading station, and means for causing each pressing device to grip a heel contained therein and apply progressively increasing, yielding pressure to said heel while a plu rality of succeeding pressing devices of the series are loaded with heels at the loading station.

6. In a heel press, the combination of a rotatable carrier, a series of heel pressing devices mounted thereon, each pressing device including a pressure applying plunger, means for rotating the carrier step'by step to bring the heel pressing devices successively to rest at a loading station, and a stationary cam coacting with the plunger during the rotation of the carrier to cause each pressing device to grip a heel as it leaves the loading station and apply progressively increasing pressure until that pressing device again approaches the loading station.

'7. In a heel press, the combination of a carrier rotatable in a vertical plane "and comprising separated, vertically disposed pressing members between which a heel may be pressed, a gage mounted upon one or said members, and located be tween said members, adapted to support a. heel loosely in the space between said members, and means for moving one of said members toward the other to grip. the heel when the carrier is rotated.

8. In a heel press, the combination of a heel pressing member, an opposed, movable, heel pressing plate spaced from said member, a telescopic, spring-expanded plunger carrying said plate, and cam means for operating the plunger to apply pressure through the spring to a heel gripped between said member and said plate.

9. The method of pressing freshly built, pasted heels which comprises subjecting a freshly built heel to pressure, maintaining said pressure uninterruptedly and progressively increasing it while the paste in the heel is drying.

10. The method of pressing freshly built, pasted heels which comprises subjecting a freshly built heel to yielding pressure, maintaining said yielding pressure uninterruptedly and progressively increasing it while the paste in the heel is drying.

11. The method of pressing freshly built, pasted heels which comprises subjecting a freshly built heel to pressure, maintaining said pressure uninterruptedly and progressively increasing it through a plurality of minutes of time while the paste in the heel is drying.

WILLIAM HUBBARD.

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