US2197796A - Channel cutter attachment - Google Patents

Description

April 23, 1940. J. FERRARA CHANNEL CUTTER ATTACHMENT Filed Jan. 5, 1938 FIG 2 INVNTOR BY .JZH/v fE/PRA IPA Z 6 A7?0RNEV Patented Apr. 23, 1940 I "omen STATES PATENT OFFICE John Ferrara, Rochester, N. Y.

Application January 5, 1938, Serial No. 183,508

6 Claims.

This invention relates to channel cutter attachments for shoe repair stitching machines and has for its object to provide a novel form of cutting mechanism for such an attachment in order that both straight and curved. channels may be efficiently cut thereby.

This and other objects and attendant advantages will become more readily apparent from the detailed description of the invention which follows, reference being had to the accompanying drawing in which:

Figure 1 is a perspective view of the novel channel cutter attachment. 7

Figure 2 is a perspective view of a modified form thereof.

I The channel cutter attachment forming the subject matter of my present invention is adapted for use with'a stitching mechanism such as is illustrated in connection with the Resoling stitching machine illustrated in my prior Patent No. 1,924,737, issued August 29, 1933. The channel cutting mechanism of this prior patent is operated by a certain reciprocating member of the stitching mechanism. My present invention, while also operating in conjunction with the stitching mechanism, is driven independently thereof so that any rotating member thereof or a separate motor may be utilized for the purpose of furnishing the driving means therefor.

As illustratedin Figure 1 of the drawing, the channel cutting mechanism 'is embodied in and cooperates with the presser foot which is located at the outer end of the bracket 2. In the bracket are provided the elongated holes 3 and 4 and the clamping screws 5 and 6 pass thru these holes to clamp the bracket to the arm I of the stitching machine. The holes are elongated so as to provide for ahorizontal endwise adjustment of the bracket-2 on the arm 1. Mounted in the bracket 2 so as to be adjustable verticallythereon is the bearing block 8. This block is shaped so as to be guided in a straight line motion in the bracket. Mounted to rotate in the bracket but held against endwise movement by the pin 9 is the adjusting screw Ill. This screw is threaded into the top of the bearing block B so that rotation thereof causes the bearing block to move up or down in the bracket.

Mounted to angularly slide in the bearing block is the cutting knife or chisel l I. This chisel projects from the bearing block so that on the rapid reciprocation thereof the channel I2 is cut into the surface of a sole [3 that is fed under the presser foot during the stitching operation. The cutting knife or chisel is attached to the holder l4 and the latter is provided with the vertical cam slot IS. A crank pin l6, carriedby the crank IT, projects into the slot so that the rotation of the crank causes a rapid reciprocation of the knife holder and knife; The crank is carried by the shaft l8 and the latteris journaled in an extension IQ of the bracket 2. v

The shaft I8 carries the pulley and a belt 2! driven by a suitable rotating member of the stitching machine or anelectric motor is adapted to rotate the shaft and. operate the channel cutting mechanism.

As in the resoling stitching machine, above referred to, the stitching of the sole to the Welt is adapted to take place in the channel out. by the cutting knife so that the stitching is embedded therein and will not be worn off by the wearer of the shoe.

In Figure 2 I have illustrated a modified form of the channel cutting mechanism. In this modification the channel cutter 23 is carried by an oscillating shaft 24 and projects laterally therefrom. The oscillating shaft is mounted in the bearing block 25 and a crank'26, operated by a link -21, is adapted to impart the proper oscillating motion from suitable driving means. 1

In oscillating-the cutter 23 cuts laterally into the sole and in doing so forms a channel 28 similar to that producedv by the reciprocating cutter illustrated in Figure 1.

I claim:

1. An attachment for stitching machines comprising a bracket, a presser foot provided on said bracket, fastening means providing a horizontal adjustment for said bracket on the stitching machine, a bearing in said bracket, a channel cutter angularly mounted in said bearing and means carried by said bracket for rapidly reciprocating said cutter in said bearing.

2. An attachment for stitching machines comprising a bracket, a presser foot provided on said bracket, a bearing block carried by said bracket,

a cutter angularly slidable in said bearing block and means carried by said bracket for reciprocating said cutter in said bearing block.

3. An attachment as set forth in claim 2 in which said bearing blockis vertically movable with said cutter in said bracket relative to said presser foot.

4. An attachment for stitching machines comprising a bracket, a presser foot provided on said bracket, a bearing block carried by said bracket, a cutter mounted to reciprocate in said bearing block, means carried by said bracket and operatively engaging said cutter to cause said cutter to rapidly reciprocate, and means for Vertically adjusting said cutter with the cutter operatively connected with said first named means.

5. An attachment for stitching machines comprising a bracket, a presser foot carried by said bracket, a cutter mounted to reciprocate in said bracket, rotary operating means carried by said bracket, and means connecting said rotary operating means with said cutter and transforming its rotary motion into a reciprocating motion for said cutter.

6. An attachmentfor stitching machines comprising a bracket, a presser foot carried by said bracket, a cutter mounted to reciprocate in said 1 bracket, means for adjusting said cutter relative to said presser foot, rotary operating means, and means connecting said rotary operating means with said cutter and transforming its rotary motion into a reciprocating motion for said cutter.

JOHN FERRARA.

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