US1225900A - Sole-splitting machine. - Google Patents

Description

EN @TATES PATENT EDWIN A. WEBSTER, 0F PLAISTOW', NEVJ I-EAMFSHIRE, ASSIGNOR '1"0 UNITED SHOE v MACHINERY COMPANY, JERSEY.

OF PATERSON, NEVI JERSEY,

a conronefrron or NEW SOLE-SPLITTING MACHINE.

1,225,9ilil.

Application filed September 7, 1915.

To o'ZZ whom i may concern:

Be it known that I, EDWIN A. EBSTER, a citizen of the United States, residing at Plaistow, in the county of Rockingham and State of New Hampshire, have invented an Improvement in Sole-Splitting Machines, of which the following is a specification.

This invention relates to machines for splitting the heel-portion of the soles of shoes, so that a thin tongue, or flap may be turned up from the grain side of the leather to cover the breast-portion of a wood heel.

ln machines of this character it is customary to provide a bed having a fiat, corrugated, sole-supporting surface and a splitting knife which is disposed in parallel relation to said surface, and transversely thereof, together with means for causing the bed or the knife to be moved reciprocally, one with relation to the other, to split 01T the tongue from the heel of the sole.

In the particular machine illustrated, and in which my invention is embodied, the splitting knife is held stationary and the bed is reciprocated therebeneath, but it is not essential to my invention Whether the bed or the knife be reciprocated.

In machines of this character the sole is pressed onto the bed, so that it will not be moved out of position thereon, by various means, common forms being a presser roll 0r a presser bar which bears on the sole in advance of the knife edge.

Machines of this character frequently perform their work unsatisfactorily for the reason that the flap, which is split off, is not of uniform thickness, or is unduly stretched, or is torn off, damage of this sort frequently rendering the sole unfit for use as a sole. Variations in thickness ofthe flaps, which are split off, are due to various causes, one of which is the variation in the substance, or hardness of different soles, or different portions of the same solo. That is, variations in hardness of the leather will vcause variations in the extent towhich the knife will dig into the saine as the splitting operation proceeds. Moreover, evcn if there is no substantial variation in hardness, the knife will frequently split off a flap of increasing thickness from the heel end of the sole, as its beveled edge tends to lift the sole more and more from the bed, as it advances, and while Specification of Letters Patent.

i least stretched out of shape.

Patented May i5, i917. Serial No. 49,205.

this action may be very gradual the dierence in thickness at the end and at the shank may be varied to a marked degree.

A further diiiiculty, which is encountered, arises from the tendency of the machine to stretch or tear off the flap on its return motion, or as the sole is carried back beneath the presser gage. To prevent the knife from digging into the sole, or lifting it up at some points more than others, Ait is necessary to have the presser-gage bear ou the sole with considerable force, and as close to the knife edge as practicable, but when this is donc, the presser bears with so much' force on the sole,during the return motion, that the flap is frequently torn off, or at The object of my invention is to provide machine of the above described character with means for holding the sole against the bed in .such a manner that the flaps, which are split off, will be of uniform thickness throughout, under all conditions, and will not be stretched, torn, or otherwise injured by the machine when the motion of the parts is reversed.

I accomplish this object by providing a form of sole gage which is adapted and arranged to engage and bear sharply on the sole surface in sufficiently close proximity to the knife edge and with sufficient force to prevent the knife from digging into, or lifting up the sole, and thus splitting o a flap which is thicker in some portions than in others, and which is adapted to yield to permit the iap to pass freely between it and the knife, on the return motion of the bed, so that the possibility that the flap will be torn ofi', or stretched, is obviated.

For a more complete understanding of my invention, reference is made to the accompanying drawing, in which:-

Figure l is a plan view of the bed portion of a sole-splitting machine embodying my invention.

Figs. 2 and 3 are longitudinal sectional views thereof.

Fig. 4 is a front end view.

Fig. 5 is a detail end view of the presser, or sole holding gage.

In the drawing a indicates the frame 0f a sole splitting machine of the type above re- 105 ferred to, I; the bed, and c the splitting knife, said bed having a flat, corrugated, sole-receiving face and having means, as the connecting rod d, for reciprocating the same beneath the knife, between predetermined limits, and at right angles to its cutting edge.

According to my invention a sole-holding gage e is rotatably mounted in lugs f at each side of the guide-ways in which the bed reciprocates, said presser having one or more sole-engaging po-rtions c', e', either, or any one of which may be employed, and each of which is provided with a curved sole-engaging surface e2, which terminates in a face c3, disposed in a plane which extends approximately radially with relation to the axis about which the gage swings, and parallel thereto. Said gage is adjusted and arranged such a position that the edge e4, provided at the meeting of the surfaces c2, c3, is held above and in advance of the cutting edge of the knife, at a distance equal to, or corresponding to the desired thickness of the flap to be split 0E. A set screw g is mounted in an angle bracket L, in position to engage said gage at a convenient point, as one of the surfaces e3, so as to prevent the edge c4 from being swung reari' wardly over the knife, tion above referred to.

A coiled spring 7c is arranged about one trunnion of the gage in position to rotate the gage in a direction to cause it to be normally held against saidV stop-screw g. ln practice the bed may be pressed upwardly against the gage e by springs, as c', or the gage and knife may, obviously, be pressed down by spring action.

In operation, the gage c holds the sole firmly in position on the bed, so that its upper surface is firmly held in a predetermined relation to the knife. lVhen thus held, the knife will not lift up the sole or be permitted to dig into it to a greater depth at one point than at another, and, as a result, the Hap, which is split off, will be of uniform thickness. n the return motion of the bed, to withdraw the sole, the gage is swung back against the action of the spring 7c by the friction of the sole thereagainst, so that the edge c4c is carried back from the knife edge and up from the bed, the space therebetween thus being increased to a sufficient extent to relieve all strain from the flap, and permit it to pass freely therebetween, as shown in Fig. 5. All danger that the flap will be pulled off, stretched or otherwise damaged, is thus avoided, and, as soon as the sole is carried out of contact with the gage, thespring swings it back to its normal position, or in position to engage the next sole.

When one sole-engaging-portion becomes worn, sov that itis uneven, another'portion may be moved into position, and, when it is or beyond the posidesired to make all the sole-engaging surfaces level or true, the gage may be placed in a lathe and this work readily accomplished.

l claim l. A sole-splitting machine having a splitting knife and a sole supporting bed, means to reciprocate said knife and bed relatively, a presser gage for holding the sole against the bed in proximity to the knife edge, and means permitting said gage to move out of effective pressing engagement with the sole on the return movement of the reciprocatingl part.

2. A sole-splitting machine having a splitting knife and a sole supporting bed, means to reciprocate said knife and bed relatively, a presser gage, means for causing said gage to press the sole firmly against the bed in proximity to the knife edge during the forward movement, and means permitting the sole-engaging portion of sai gage to move away from the bed and the knife edge on the return movement of the reciprocating part, whereby the pressure of the gage upon the sole is greater during the forward movement than during the return movement.

3. A sole-splitting machine having a splitting knife and a sole-supporting bed, means to reciprocate said knife and bed relatively, a presser-gage having a sole-engaging face normally extending into proximity to the knife edge and terminating abruptly at that point, and means permittingmovement of said gage to carry its soleengaging face away from the knife-edge and the surface of the bed, at the beginning of the return movement of the reciprocating part.

4. A sole-splitting machine having a splitting knife and a sole-supporting bed, means to reciprocate said knife and bed relatively, a presser-gage mounted above the bed to swing about an axis approximately parallel to the knife-edge, and having a kcurved face arranged to engage the sole in proximity to the knife edge, and recessed over the edge portion of the knife to terminate said face abruptly, and a stop for limiting the swinging movement of said gage toward the knife.

5. A sole-splitting machine lraving a splitting knife and a sole-supporting bed, means to reciprocate said knife and bed relatively, a presser-gage mounted above the b ed to swing about an axis approximately parallel to the knife-edge, and having a curved face arranged to engage the sole in proximity to the knife edge, and recessed over the edge portion of the knife to ter- Y minate said face abruptly, a .stop for limiting the swinging movement of the Vgage toward the knife, and means to hold said gage yieldingly in engagement with lsaid stop.

6. A machine of the class described, having, in combination, a Stationary knife, a stock supporting bed, means for reciprocating said bed to cause the knife to produce a Hap on the stock and then to be Withdrawn, a gage for pressing the stock against the bed in advance of the knife, and means for causing the gage to exert a greater pres- Copies of this patent may be obtained for ve cents each, by addressin Washington, D. C.

In testimony whereof, I have signed my name to this specification.

EDWIN AQWEBSTER. Vitness:

L. H. HARRIMAN.

g the Commissioner of Patente,

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