US1993753A - Mechanism for roughening the sole portions of lasted uppers - Google Patents

Description

March 12, 1935. RQHRER MECHANISM FOR ROUGHENING THE SOLE PORTIONS OF LASYTED UPPERS Filed Dec. 31, 1931 jy 2 7 l .5 5

a 0N If O o B o n o o 7 0 OFF 6 INVENTOR:

John Milton Rohrer,

Patented Mar. 12, 1935 MECHANISM FOR ROUGHENING THE 'SOLE PORTIONS F LAs'rEn UPPERS John MiltonRohrer, Orwigsburg, Pa. Application December 31, 1931, Serial No. 584,185

3 Claims.

My invention relates to mechanism employed in the manufacture of shoes, and comprises means for rasp-ing or roughening the turned over and wiped clown portion or portions of an upper 5 applied to a last, the latterusually carryingan insole, preliminary'to the application of an outer sole which is secured to such lasted upper by a suitable adhesiveor cement.

My invention includes a mold in which the lasted upper is fixedly supported; a rotating roughening or rasping element, which may be a brush having wire bristles, or an abrading wheel, or the like, designed to roughen or rasp the surface of the turned over and wiped portion of the upper carried by the last, and means whereby said rotating element may be driven in two directions.

An important object of my invention is the provision of means for effecting movement of 2c the rotating element, brush or the like, in two directions whereby operation of the same with respect to the turned over and wiped portion of the lasted upper to be rasped or roughened is facilitated. Such means permit the operator to stand at one side of the mold and cause the brush to operate toward the centre of the mold on all sides of the turned over and wiped down portion of the upper disposed'therein, instead of away from it. These and other features of my invention are more fully described hereinafter; reference'being had to the accompanying drawingImore or less diagrammatic in'character, inwhich:

Figure 1 is a' view ofthe mold-carrying table andmold with a :lasted upper mountedth'erein;

showing also the rotating element and its operatingmechanism.

Fig.2 is ,a diagrammatic planview of the mold,

illustrating the manner in which the rotating 40 element is operated with respect to the lasted upper;

Fig. 3 is a 'view in elevation of driving means actuated bya suitable motor and adjustable to two positions whereby the rotating element may be driven in opposite directions .as desired, and

"Fig. is a perspectiveview of treadle mecha= nism which I may employ for the purpose of controlling the operation of thed'ri'ving mechamsm.

In the manufacture of shoes according to my invention, it is proposed to secure an outer sole to the lasted upper and the insole forming part of such shoe structure by, a suitable adhesive or cement. This is common practice and is well known. The turned portion of the upper laid (Cl. 12.-51) f over and wiped down .upon and secured to the insole carried by the last by a suitable adhesive or cement presents the natural grain or finished side or surface of the leather employed and under all conditions, especially if such leather is of 5 the patent or enamel type, the surface is not in condition to receive an adhesive or cement and insure that the coating or film of such adhesive or cement so applied will properly secure "the outer sole thereto. In order that the turned 10 and wiped portion of the lasted upper may be in condition to receive, and by the aid of the adhesive or cement secure, the outer sole firmly in position, it is necessary to remove by scarifica- 'tion, or otherwise, the grain or other surface of 15 such turned over and wiped down portion of the upper, and I propose to do this by a rapidly rotating element, which may be abrush having metal bristles. 1

The action of this rotating element should be 20 toward the centre of the mold; that is to say, the abrading or roughening device should be passed around the turned over and wiped down portion or edges of the upper so that its roughening or rasping action is directed inwardly. The rotating element which I employ is-driven by a suitable motor through the use of a flexible shaft, and the connection is such that while such rotating element when driven in one direction may be readily operated with respect to one side of the 30 upper mounted in the mold, engagement with the opposite side of the upper would be difiicult if the rotating element always rotated in the same direction. To overcome this difiiculty I provide-means whereby the rotating element may be actuated in both directions through simple driving means, preferably a friction drive, associated with the motor; simple treadle mechanism, duplex in character, being provided whereby one element of driving means may be readily shifted in either directionas desired.v By such arrangement the operator may stand at one side of the mold and conveniently apply the roughening or abrading element to work inwardly.

In the drawing, 1 represents a suitable table or support upon which is mounted a sectional mold 2; This mold may be of the type described in my application filed October 9,1930, Serial-No.

487,535, or that illustrated in my companion 50 application. This sectional mold may be held in the closed position by spring actuated levers 3, which may be moved to inactive position by treadle mechanism, indicated at 4, as set forth in the applications referred to. A lasted upper is carried by the sectional mold, as indicated at 5.

A rotating element for rasping or roughening the turned over and wiped down portion of the upper overlying the insole secured to the last, in the present instance illustrated as a brush, is indicated at 6. This rotating element is driven by a flexible shaft '7, which receives its motion from suitable driving mechanism, more particularly illustrated in Fig. 3, which driving mechanism in turn is actuated by a motor 8, which may be mounted upon a shelf 9 beneath the table 1.

The driving means is preferably in the form of beveled friction wheels or rollers. The motor shaft 8 carries a friction roller 10 which moves constantly in the same direction when the motor is running. A shaft 11 is supported in suitable brackets 11 carried by the shelf 9, and-this shaft carries a pair of driven rollers 12 and- 13, with beveled faces, which rollers may be shifted alternately into engagement with the roller 10 carried by the motor shaft 8?"; being normally maintained out of contact therewith.

The respective driven rolls 12 and 13 are under the control of a lever 14, which may be pivotally mounted as at 14 on one of the supports 11 for the shaft 11; one end of such lever being up-turned and forked for operative engagement with collars 12 and 13 carried at the end of the shaft 11; a bronze bushing 11 being preferably interposed between said collars. When this lever 14 is rocked in one direction the roller 12 is moved into frictional engagement with the beveled roller 10 carried by the motor shaft, and when said lever is rocked in the opposite direction the roller 13 is moved into engagement with said roller 10. The beveled driven rollers 12 and 13 are connected with the shaft 11 by pins passing through hubs of said rollers; the latter being slotted as shown, and these rollers are held in neutral position by means of springs 12 and 13 To effect movement of said lever 14, I provide suitable treadle mechanism, duplex in character, clearly illustrated in Figs. 1 and 4. The lever 14 is pivotally mounted at 14 and connected to the end of the same opposite the connection with the bushing 11, is a rod 15, the lower end of which is connected at 15 to a foot treadle 16, fulcrumed at 16*. The foot treadle 16 is pivotally connected at 16 to a foot treadle 17, fulcrumed at 17*. When it is desired to move the rotating element so that its active surface will move in one directionthat indicated by the arrows a, in Fig. 2, for instance-the foot treadle 16 is depressed; lifting the rod 15 and causing the lever 14 to turn on its pivotal connection and move the shaft 11 to the right, (Fig. 3) thereby carrying the roller 12 into engagement with the motor driven roller 10. When it is desired to move the rotating element so that its active surfaces will move in the opposite direction-that indicated by the arrows b, Fig. 2the foot treadle 17 is depressed, thereby lowering the rod 15 and causing the lever 14 to turn on its pivotal connection and move the shaft 11 to the left; thereby carrying the roller 13 into engagement with the motor driven roller 10. The engagement of the respective rollers 12 and 13 with the motor driven roller 10 is preferably frictional and rendered more or less resilient by the presence of the springs 12 13 which lie between the hubs of said rollers and collars 20, 21, carried by the shaft 11.

The rotating element 6 may be provided with a handle portion 6 to be grasped by the operator when applying the same to the turned over and wiped down portion of the upper overlying the insole carried by the last. The flexible shaft '7 is connected to the shaft 11 at 7 and such flexible shaft may be of any suitable character. Push buttons to start and stop the motor may be carried by the table, as indicated at 22.

Various modifications may be made in the above embodiment of my invention without departing from the spirit and scope thereof as set forth in the following claims.

I claim:

1. The combination of a circular abrading element adapted to be rotated, a flexible shaft for actuating the same, means for actuating said shaft in opposite directions including shiftable operating mechanism, a pivoted lever for shifting said operating mechanism when moved to either one of two positions, a rod depending from said lever, and duplex treadle mechanism operatively connected to said rod; one treadle serving to lift the rodand rock the lever into one position, and the other treadle serving to lower the rod and rock the lever into a second position.

2. The combination of a circular abrading element adapted to be rotated, a flexible shaft for actuating the same, a driven shaft slidably mounted and operatively connected to said flexi ble shaft, a pair of friction rollers carried by said slidable. shaft in opposed relation, a motor driven shaft, a friction roller carried by the same and rotating in one direction; said friction rollers carried by slidable shaft being mounted for engagement with said motor driven roller, a rocking lever operatively connected to said slidable shaft, a rod depending from said lever, and duplex treadle mechanism operatively connected to said rod; one treadle serving to lift the rod and rock the lever in one direction, and the other treadle serving to lower the rod and rock the lever in another direction.

3. The combination of a rotatable element, a flexible shaft for driving the same, a slidable shaft operatively connected to said flexible shaft, a pair of oppositely disposed friction rollers carried by said slidable shaft, a motor, a shaft driven thereby, a friction roller carried by said motor shaft for alternate engagement with the friction rollers carried by the slidable shaft, a pivotally mounted lever operatively engaged with said slidable shaft, said lever when rocked in one direction bringing one of the friction rollers carried by the slidable shaft into operative engagement with the motor driven roller and when rocked in the opposite direction bringing the other friction roller carried by the slidable shaft into engagement with the motor driven roller, a rod for operating said rocking lever, a foot treadle to which said rod is connected; said treadle serving to lift the rod, and a second foot treadle pivotally connected to the first foot treadle and serving to lower said rod when actuated.

JOHN MILTON ROHRER.

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