US1115079A - Dies for clicking-presses. - Google Patents

Description

J. M. LYNCH. DIES FOR CLICKING PBESSES.

APPLICATION FILED nno.24, 1000.

1,1 1 5,079. Patented Oct. 27. 1914.

l/WT/VESSES era-res PATENT OFFICE.)

ASSIGNOR T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

To all (U/LQ/ft it may (.onccv'n Be .it known that I, JOHN M. Lynch, a citizeno'f the United Erltates, residing at Beverly, in the county oi' Essex and Commonwealth of Massachusetts, have invented cer tain Improvements in Dies for Clicking- Presses, of which the following description, in connection with the'accompanying drawings, is a specification, like characters on the tcrial such as leather, fiber-board, cloth or the like and particularly relates to dies of the type usedwith a clicking press for cutting sheet material having dissimilar sur- 'faces, such asupper leather for boots and shoes. In forming such portion of a shoe from upper leather, it is necessary, in order to bring the. grain side, or the finished side in the case of patent leather, upon the outside of the shoe, to cut out similar but reversely shaped pieces, known as right and left blanks respectively, for the opposite sides of the same shoe and also for corresponding portions of the right and left shoes.

comprising a pair. Heretofore these blanks have been cut by using two separate dies, similar but reversely shaped, which have to be separately manipulated and located upon the leather and separately actuated to make the cutting operation. i One of the objects of the present lnvention is, accordingly, to provide a single die' constructed so as to out two blanks of the character indicated at a single operation whereby two blanks may be cut n the tune required previously for cutting a slngle blank.

The cost of a die for cutting upper leather is proportional to the number of lineal inches of die stock thereinso that a single compound die, in which one or more cutting blades are common for cutting the outlines of separate blanks is more economical than separate dies for cutting the same blanks. Moreover there is greater convenience in handling a single die rather than separate dies for cutting two blanks and a considerable additional savingof time in consequence.

It is, therefore, a further object of this invention to provide a single die constructed for cutting simultaneously a right and Specification of Letters Patent.

Application filed December 24, 1908.

DIES FOR CLICKING-PRESSES.

Patented Oct. 27, 1914. Serial No. 469,140.

cal and time saving advantages of a compound. die are attained. Compound dies of the character indicated possess a marked advantage over the narrower dies designed for cutting a single blank; A disadvantage of the narrow die is that it is difficult in practice for the operator to place and keep it in position with its side edge accurately placed upon the line of the last blank cut, as it should be placed to avoid waste, and, even when accurately placed, the die is liable to move slightly toward the open spaces during.

the cutting stroke because that edge is unsupported by the stock. The result is that the die may be carried more or less beyond the edge of the leather and in that case an imperfect blank is made which is of no value. My improved compound die is free from the defects incidental to a narrow die by reason that it has a much greater bearing 1 surface and consequently the unsupported edge forms but a small portion of the whole so that the tendency of the die to IIIOW: toward the open space is avoided. Another advantage of my compound right and left die is that the operator has no chance to cut a great number of unmated blanks, as he inadvertently might do with separate right and left dies, for without any thought on his part each blank cut is automatically mated by the compound die.

In the accompanying drawings I have illustrated several embodiments of my invention comprising compound right and left dies suitable for use in a clicking press for cutting out various parts of the uppers for shoes although the invention is not liinited to the precise forms shown but may be embodied in various other designs.

Figure 1 is a perspective view of a compound die forcuttingright and left foxing blanks; Fig. 2 shows a die for cutting right and left quarters; Fig. 3 shows a die for cutting right and left foxing blanksuof a different design from those cut by the die shown in Fig. 1. Fig. 4 shows a die for cuttingright and left facing stays or strips.

In cutting blanks for the foxings used on the uppers of shoes it is necessary to shape those to be used on opposite sides of the shoe similarly but reversely so that the proper side ofthe leather in each blank may be upon the outside of the shoe.

In Fig. 1 there is illustrated, in inverted left blanlnby the use oi which the economiposition, a compound die for cutting separate reversely shaped right and left foXing blanks in a single operation. The die comprises a continuous or closed metal frame 3, 4L, 6, 5 of one or more pieces of bar steel or other suitable metal bent to the required shape and welded together and the straight central blade 2 which is located along the axis of symmetry of the closed frame and divides it into two unsymmetrical and reversely shaped parts. The sides and central blade of the die are beveled toward the cutting edge, as shown by the broken section in Fig. 1, and ground sharp for cutting while the other edge or back of the die is ground flat and lies in a single plane, whereby the workingpressure may be uniformly applied over the entire die. The cutting edge also lies entirely in a single plane and this is parallel to the plane of the back of the die. It will be seen that the outer frame of the die has a reduced projecting portion at one sidein which one end of the intermediate blade 2 terminates. In practice the die is placed upon the grain side of the leather, or the surface which is to appear upon the outside of the finished shoe, suitably located to avoid waste and imperfections, and pressure is then applied to the upper flat side of the die by causing the arm of a clicking press to descend upon it, whereupon the portion 3, 4:, 2 cuts out a right foxing blank and the similar but reversely shaped portion 5, 6, 2 simultane ously cuts a left blank. It will be apparent that the blade 2 answers for cutting part of the outline of each blank and that there is saved by the use of such a die over separate right and left dies for the same blanks an amount of die stock equal to the length of this blade. i

In Fig. 2 there is illustrated a combined die for cutting mated and reversely shaped right and left quarter blanks. In this die the portion 15, 16, 12 is designed to cut out a right quarter and the portion 13, 1a, 12 is designed to cut out simultaneously a left quarter, the blade 12 answering for cutting the bottom line of both blanks.

In Fig. 3 there is illustrated a combined die for cutting mated and reversely shaped right and left foxing blanks the shape of which is different from those out by the die shown in Fig. 1. In this die the portion 23, 24, 22 is designed to cut the outline of one blank and the portion 26, 27, 22 simultaneously cuts the outline of its mate, similar but reversely shaped, while the blade 22 cuts the straighter line of both blanks.

Fig. 4 shows a combined die for cutting mated and reversely shaped right and left facing stays such as are used at either side of the lacing slit upon the inside of shoes. In this die the portion 33, 34, 32 is designed to cut the outline of one blank andthe portion 36, 37, 32 simultaneously cuts the out line of its mate, the blade 32 cutting the straighter side of both blanks.

The dies herein shown are intended for use in clicking presses and in such use are moved about on the skin of leather by the operator and placed in different positions in determining the most advantageous position to cut the blanks. Such dies are herein termed loose dies as distinguished from the dies forming a permanent part of the construction of die presses other than clicking presses.

Having fully described my invention what I claim as new and desire to. secure by Letters Patent of the United States is A loose die adapted to be freelypositioned in a clicking press for cutting a pair of reversely-shaped at a single operation, comprising a continuous frame having an outwardly extending reduced portion. at one side bounded, in part, by walls of concave curvature, said die having oppositely disposed parallel edges one sharpened for cutting and the other flattened to receive the pressure, together with an intermediate cutting blade having a single cutting edge and a pressure receiving edge disposed in the sameplane as the corresponding edges of the outer frame, said blade terminating at one'end within the re duced portion and dividing the frame into two non-symmetrical and reversely-shaped portions.

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

JOHN M. LYNCH.

Witnesses v I'IERBERT WV. KENWAY, ARTHUR L. RUSSELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, 13.43.

shoe upper blanks

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