US1109700A - Lasting-machine. - Google Patents

Description

T. H. O'BRIEN.

LAS'IING MACHINE.

APPLICATION FILED AUG '1. 1912.

1,109,700. Petettet Sept. 8, 1914.

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UNITED STATES PATENT OFFICE.

THOMAS HENRY OBRIEN, OF CAMDEN,

MACHINERY COMPANY, OF PATERSON,

JERSEY.

T 0 all whomit may concern lie it known that I, THOMAS H. OBurnn, a. citizen of the United States, residing at taniden, in'the county of Camden and State o New Jersey, have invented certain Imo? the hand method type. such for example as that shown in United States Letters Patent No. 5.;)7.321, and especially to a machine. which is used for lasting the sides of a welt shoe.

In lasting welt shoes, except at the heelseat. the tacks are left partially upstanding to facilitate pulling them out after they have served their purpose and as a result of experience machines have-been arranged as described in said prior patent to insert the tacks in a direction inclined downwardly and inwardly. toward the middle. line; bf the last. In-lasting the shanks on lasts which are deeply undercut' 'as are most modern lasts, particularly in womens shoes to provide a narrowshank, it is necessary for. the o1 era'- tor to tilt'the shoe so that the normal inclination of thoftuck is-increased to anexteut 'that 'frequently allows the i1 per to slip up the stein to tar-toward the head of the tack and thereby become slack. The objectof this inventionis to overcome this difiiculty, and in fact to improve the lasting by so manipulating a driven tack as to tighten the upper held by it. For this purpose, means is provided for bending a tack inwardly after it has passed through the uper. By this means the tack is tipped to a position where the tension of the upper d aws the upper down toward the insole ln-- stead of up toward the head oft-the tack; lso, it may be, the tack can be made to act upon the upper through which it extends as a lever of the'sccond class to draw the upper inwardly while the bonding is occurring.

."is an important feature of the invention, means is employed for bending the tacks inwardly. the operation having, the effect of causing the upper to slide down the tack toward the point so that it hugs the last nunr'lu 'ilV. The bending of the tack also F has the eii'ertof teusiouing the u er moi- Specification of Letters iatent.

mw JERSEY, ASSIGNOB TO 'UNI'rED SHOE 'NEW JERSEY, A CORPORATION OF NEW LASTING-MACHINE.

Patented Sept. 8, 1914.

A li ation filed August 7, 1912. Serial No. 713,784.

fully than is the case when the attaching means is straight. incidentally also the holding effect of the trick is greatly increased by its being bent inwardly, the strain of the upper upon the tack being brought to a point nearer the hold of the tuck in the wood of the last, so that it is unnecessary to drive the tack as deeply into is easier to pull.

Obviously various devices may be employed for bending the tacks, and it is to be 'thc'wo'rk as heretofore, wherefore the tack understood that the invention is not limited to any particular mode or mechanism for effecting this result. As a simple and elfective manner of embodying the invention I have adapted the reciprocating tack block of the lasting machine to perform this function by providing thereon a lateral extension which is arranged to contact with the tack last previously driverr and to bend it inwardly a suflicient distance to secure the desired result. If desired the extension may be provided upon each side of the tack block so that the last previously driven tack will be bent by the movement of the tack block into position to drive the succeeding tack,

whichever may be the direction in which the lasting operation is progressing.

. Figure 1 is a perspective view of an embodiment of the invention as applied to a machine of the hand method type; Fig. 2 is fragmentary section of a modified form of the construction. I

The tack block 2 is mounted upon a slide 4 of the lasting machine which reciprocates to and fro to carry the tack block forward over the edge of the shoe bottom and back again. As usually constructed the tack block is provided with tack jaws .6 which are pressed toward each other by suitable springs 8 and hold the tack which is automatically delivered to them in position to be driven by the driver 10 when the forward limit of movement of the tack block is reached. the jaws 6 separating to permit the passage (if the tack and driver.

l pon the under side of thetack block is secureda plate-14, known as the thumb spring, and in the embodiment of the invention herein illustrated the plate 14 is provided with lateral extensionslti which. mayfif desired, be integral with the plate 14. As the tack block? moves inwardly over the shoe bottom to drive a tack, one of previously driven tack whichever may be the 7 direction in which the lasting operation is progressing.

In Fig. 2 a similar construction is shown in which the forward or tack engaging face of the projection 16 is inclined forwardly and upwardly so that always the head of the tack rather than its shank will be engaged by the projection during its tack bending operation. Since in this construction the head of the tack is continuously en I gagcd by the bending device, the tack is bent with less expenditure of force.

By bending the tacks the holding eiiect of each tack is greatly increased as the strain of the upper upon the tack is brought closer to the point where the tack enters the last. For this reason-less tacks need to be driven than in .the case where they remain in the position in which the driver leaves them.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a lasting machine, the combination avith means for wiping successive portions of the upper into lasted position,means for driving tacks to secure the upper arranged to leave the stems of the tacks upstanding above the surface of the upper, and means carried by the wiping means and extending into a position laterally beyond the tack block for bending inwardly toward the last each tack prior to the insertion of-the following tack. In a lasting machine, the combination of a reciprocating tack block, a tack driver, operating and controlling means therefor arranged to leave the stems of the tacks upstanding above the surface of the upper, and means operating at a point laterally separated from the driver a distance greater than half the wfdth of the tack block for bending inwart y the tack last previously driven as the tack block moves into position to drive the succeeding tack. 3. In a lasting machine the combination of a tack block arranged for movement over the shoe bottom to wipe the upper into lasted position, a tack driver arranged to leave the stems of the tacks upstanding above the surface of the upper, and devices projecting laterally at opposite sides of the tack block and extending forward of the line of action of the driver and adapted to engage the upper portion of a previously driven tack during the movement of the tacl}; block into position to drive another tac 4. In a lasting machine, the combination of a reciprocating tack block, a driver, said block and driver being arranged to operate to eflect partial insertion of the tacks substantially as described in a direction inclined downwardly and inwardly away from the edge of the last, and a device forming a lateral projection at one side of the tack block to engage and bend inwardly the up standing portion of a previously driven tack that is spaced away from the driver a distance greater than half the width of the tack block.

5. In a lasting machine, the combination of a tack block arranged for movement over the shoe bottom to wipe the upper into lasted position, a tack driver, the tack block and driver being relatively arranged for insertion of a tack in a direction oblique to the plane of the shoe bottom, and means operating at a point laterally separated from the tack block to engage a. previously driven tack during the movement of the tack block into position to drive another tack and to bend the head portion of the tack into a vertical position.

6. In a lasting machine, a reciprocating tack block, a driver operating through the tack block and arranged to leave the stems of the tacks upstanding above, the surface of the upper, a thumb spring on the lower face of the tack block for wiping the upperinto position to be tacked, and a projection extending laterally from the thumb spring into position to engage the upstanding portion of an adjacent previously driven tack and to bend that tack inwardly as the tack block moves into position for the insertion of another tack.

7. A lasting machine having, in combination, a driver arranged to leave the stems of the tacks upstanding above the surface of the work, an oblong, endwise reciprocating tack block, and forwardly and backwardly reciprocating devices projecting laterally relatively to opposite sides of the tack block to engage a previously driven tack that is outside the path of the reciprocating tack block.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS HENRY OBRIEN.

Witnesses IIANs VVENIGER, ALEX. \VALTER.

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