US1256937A - Art of making stiffeners for boots and shoes. - Google Patents

Description

P. W. SHAW & A. F. LITTLEFIELD. ART OF MAKING STIFFENERS FOR 5001s AND SHOES.

APPLICATION FILED MAY 12, 9]6: v I 1,256,937. Patented Feb.19,1918.

2 SHEETS-SHEET 1.

Fig.1. 70/7191 APPLICATION FILED MAY 12, I916.

Patented Feb.

2 SHEETS -SHEET 2.

PERCY W. SHAW AND AUGUSTINE F. LI

TTLEFIELD, OF LYNN, MASSACHUSETTS,

ASSIGNOBS, BY MESNE ASSIGNMENTS, TO UNITED SHOE MACHINERY COR- PORATION, 0F PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ART OF MAKING STIFFENERS FOR BOOTS AND SHOES.

To all whom it may concern:

Be it known that we, PERCY W. SHAW and AUGUSTINE F. LITTLEFIELD, citizens of the United States, residing at Lynn, in the county of Essex and State of Massachusetts,

have invented certain Improvements in the Art of Making Stifi'eners for Boots and Shoes, of which the following description, in connection with the accompanying drawings, is a specification, like reference characterson the drawings indicating like parts in the several figures.

This invention relates to a method of cutting material into articles the edges of which are beveled, and particularly to cuttin from stock certain parts used in the manu acture of bootsand shoes.

For convenience the description will be 1 limited to a method of cutting counters from leather stock, but it should be understoodthat' the invention may be employed in making similar articles, for example box toes, from any suitable material.

Hitherto it has been customary to die out counter blanks from a piece of leather and then to run the died out blanks through a skiving machine in order to give them a continuous beveled edge. There is a large amount of waste involved in carrying out this procedure; and to re uce this waste was one of the objects of the method of the patent to Engel No. 1,068,489 in which two series of counters were dipped out of a piece of leather, one series from the flesh side and the other series from the grain side. This method results in a large saving of stock, but has the disadvantage that half of the counters produced are flesh counters. Such counters are not desirable to the trade and for various reasons do not find a ready Specification of Letters Patent. Patented Feb. 19, 1918. Application filed May 12,

1916. Serial No. 97,205.

by the removal of the stifi'eners is less than the sum of the heights of the stifleners.

Another feature of the invention relates to the article produced by the process which has been outlined above.

These and other features of the invention will be described in connection with an illustratlve machine by which an exemplary method may be carried out and will be pointed out in the appended claims.

. Referring now to the accompanying draw- 1ngs,

Figure 1 is a rear elevation of an illustrative machine by which the method may be carried out;

Fig. 2 is a view partly in section of the rolls, knife and presserythe rolls being in angular position to permit a piece of stock to be removed from the machine;

.Fig. 3 is an elevation showing the relative positions of the rolls and presser at the beginning of the feed movement;

Fig. 4 is a similar view after the rolls have advanced approximately ninety 1 degrees from the position shown in Fig. 2; Fig. 5 is a front elevation of the rolls and presser in the positions shown in Fig. 3;

Fig. 6 is a similar view with the parts in the position shown in Fig. 4. In Figs. 3, 4, 5 and 6 the first counter is being cut.

Fig. 7 is a view similar to Fig. 6 but showing the position of parts during the cutting of the second and subsequent counters, in which the presser holds up the beveled edge of the stock.- I

Fig. 8 is a plan showing how the counters lie in the stock;

Fig. 9 is a plan of the second and subsequent counters all of which have a small area of flesh on the grain side.

The frame 1 has two overhanging arms 3 and 5. In alined hearings in the upper arm and in the main part of the frame is mounted a shaft 7 to which is fast at one end a matrix r0119 and near the other end two gears 11 and 13, the former gear meshing with a gear 15 on a suitable driving shaft having mounted thereon the usual fast and loose pulleys 17, 19. In hearings in the frame and in a yoke 21, the stem of which is yieldingly supported in a socket formed in the lower arm 5, is rotatably mounted a two-part shaft 23 having fast to it a die roll 25. The parts of the shaft 23 are connected by an Oldham coupling 27 the inner portion of the shaft 23 having at its inner end a gear 29 which meshes with the gear 13. An adjusting sleeve 31 threaded into the socket in the lower arm 5, and a stop nut 33 threaded on the reduced lower end of the stem of the yoke 21 furnish means for varying the tension of the spring 35 and for limiting the extent of upward movement of the yoke. A stationary knife 37 is held in adjusted position by 'a pinch bolt 39. I

With this construction a portion of a piece of stock presented to the rolls will be forced into the matrix in the upper roll, and as the stock is advanced a stifiener or other article having the shape of the matrix will be cut from the stock. The use of a die roll, a matrix roll and a knife for producing article's of a desired shape is old, and theparticular construction illustrated will not be described further except to state that the shape of the matrix illustrated is such that a counter stiffener of the general outline shown in Figs. 8 and 9 having a thick middle portion and a continuous beveled edge is produced. Attentionis directed, however, tothe construction and arrangement of the bearings of the rotary shafts which carry the rolls whereby a free and unobstructed space is provided which extends in all directions in a horizontal plane between ,the rolls. With this construction it is possible to operate upon a piece of stock in a locality close to or remote from the margin thereof. This is a particularly desirable feature since it permits the operator to select the locality from which the counter is to be dipped out.

The present machine is adapted, among other uses, to out counters from pieces of.

stock which have irregular outlines; and

. such pieces may be freely presented so as to form the counters by cuts extending in various directions with respect to any given piece.

Grdinarily a series of counters are cut from a selected locality, as illustrated in Fig. 8, in which the first counter produced is the one at the extreme left, the second, the next at the right, and so on. To accomplish this, the piece of leather 100 isfed between the rolls in the direction indicated by the arrow once for each counter produced. The counters are thus. cut one at a time, and the base of each counter, as it lies in the stock, underlies the top of the next preceding one except, of course, that of the first counter. The result is that a series of counters are dipped out of the same sidethat is the grain side-of the stock, of which the first is a perfect grain counter while those which follow each have a small portion of flesh surface caused by the overlap After the first counter has been dipped out a beveled edge is produced around the hole indicated by the dotted line 41 which extends upwardly to the edge 43 of the cavity from which the counter has been removed. It will be'seen that a part of the right-hand portion of this beveled edge is to form a part of the second counter. If, however, after the removal of the first counter, the piece of leather were fed through the rolls without further mechanism than has been described, a part of this. beveled portion would hang down in the ipath of the knife and be cut off. By referring to Fig. 6, which illustrates the cutting out of the first counter and in which the line of cutis indicated at 45, it will be seen that the right-hand edge of the leather is of uniform thicknessand that consequently the upper or grain side of that portion of .the leather which is to be cut out to form a counter is forced firmly up against the bottom of the matrix in the upper roll at that point as well as at all other points. Referring now to' Fig. 7, in which the cutting out of the second counter is shown, the right-hand edge of the leather isno longer of uniform thickness with the rest but is beveled or tapered and consequently would hang down more or less out of contact with the bottom of the matrix in the upper roll unless provision were made for supporting it and pressing it into the matrix.

' may be moved toward each other by pressure. Normally, when no stock .is between the rolls the presser projects, as has been explained. When the stock is first fed to the rolls the presser is depressed to inoperative position as shown in Fig. 6, but thereafter, during the cutting out of the remaining counters of the series, it supports the beveled edge of the stock as illustrated in Fig. 7. As best shown in Fig. 2, the rolls 9 and 25 have cut away portions which register once in every revolution.

In the .operation the machine is brought to rest with the rolls in the position shown in Fig. 2 in which a piece'of stock may be placed between the rolls and moved about as desired in order to permit the operator to select the locality from which the first coun: ter is to be dipped out. After the cutting out of the first counter the stock is pulled back and moved sidewise, or in the direction of the height of the counter, a proper distance, and then the second counter is cut out. The counters are thus cut out from the grain side of the stock one at a time, in the direction of their length in such a manner that as they lie in the stock, they overlap as shown in Fig. 8. After a series of counters has been cut out, the stock may be moved in any desired direction to present anew locality to the rolls and knife.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. That improvement in the art of making stifleners which consists in dipping out a stiffener from one side of a piece of stock and then dipping out from the same side a second stiffener in such manner that the distance between the twoextreme edges of the cavities produced by the removal of the stifi'eners is less than the sum of the heights of the stifl'eners. 1

2. That improvement-in the art of making stifi'eners which consists in dipping out from one side of a piece of stock a series of stifieners in such manner that as they lie in the stock the top of each stiffener overlies the bottom of the next succeeding stiffener.

3. That improvement in the art of making stiffeners which consists in dipping out from one side of a piece of stock a series of stifieners in such manner that the distance between the opposite edges of the first and last cavities producedby the removal of the stifl'eners is less than the sum of the heights of all the stiifeners.

4. That improvement in the art of making stiifeners which consist in dipping out a stiffener from the grain side of a piece of leather and then dipping out from the same side a second stiffener in such manner that the distance between the two extreme edges of the cavities produced by the removal of the stifi'eners is less than the sum of the height of the stifieners.

5. That improvement in the art of mak-- ing stifi'eners which consists in dipping out from the grain side of a piece of leather a series of stifieners in such manner that as they lie in the stock the top of each stifi'ener overlies the bottom of the succeeding stiffener.

6. A stiffener having a substantially straight bottom and a curved top, there being a bevel on one side extending around the curved top and a bevel on the other side extending along the straight bottom.

In testimony whereof we have signed our names to this specification.

PERCY W. SHAW. AUGUSTINE F. LITTLEFIELD.

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