US1089724A - Process of making punches. - Google Patents

Description

G. REMNSNIDER,

PROCESS OF MAKING PUNGHES.

APPLICATION FILED MAY 5, 1910. 1,089,724.

Patented Mar. 10, 191i INVENTOR I. imowa.

eorge Remnsnider.

a flaw RNEVS UNTTE,

GEORGE REMNSNIDER, 0F BELLEVILLE, ILLINOIS.

PROCESS OF MAKING PUNCI'IES.

Specification of Letters Patent.

Application filed May 5, 1910.

Patented Mar. 10, 1914:.

Serial No. 559,608.

To all whom it may concern Be it known that I, Gnonon Rminsninnn, a citizen ot' the United States of America, residing at Bellevillc, Illinois, have invented a certain new and useful Process of Making Punches, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to a process of making punches and is particularly adapted for making punches to be used in making stencil machines. It may, however, be used for forn'iing punches of any kind.

he object of my invention is to provide a method whereby the character punched out of the stock to form the die may be secured to a suitable backing so as to form a punch to cooperate with the die.

in the accompanying drawings which illustrate apparatus for carrying out my invention, Figure l is a perspective view of the stock with the character projecting therefrom; Fig. 2 is a vertical section of the stock taken together with the master punch and die; 3 is a diagrammatic View showing the manner of welding the cha actor to the backing; Fig. 1 is a side view showing the stock and backing with the character secured thereto; Fig. 5 is a section through the die; Fig. 6 is a side elevation of the complete punch before it is separated from the die, and Fig. 7 is a perspective view of the completed die.

Like marks of reference refer to similar parts in the several views in the drawings.

10 represents the stock from which the die is to be formed. This stock 10 is placed between the master punch 11 and the master die 12 and the character 13 is punched out as shown in Fig. 2. The character 13 is not completely separated from the stock 10. On the contrary, the master punch 11 is only passed partially through the stock 10, as shown at Fig. 2, so that the character 13 remains in contact with the stock 10 at the point 1 1. The shearing eltcct, however, extends entirely through the stock so that after the weld has been made, as will be hereinafter described, the character may readily be separated from the stock either by pulling it out of the stock or by a slight blow to the stock. The area of this surface 14: which is in contact with the stock should be somewhat greater than the area of the face of the character 13. This :t'eaturo however, while an advantage, is not essential to the carrying out of the process as the weld may be successfully made where the contact area between the stock and character is equal to, or even less than the area of the face of the character. \Vhile the character 13 is projecting from the stock 10 the backing 15 is placed against the face of the character and the stock together with the projecting character and the backing 15 is placed between electrodes 16 which are connected with any suitable source of electrical energy 17 and current passed through the stock and backing in order to electrically weld the face of the character 13 to the backing 15. I find that by having the area of the contacting surface 14 greater than the area of the face of the character this welding between the face of the character and the backing 15 can be accomplished without any welding of the contacting suritacc 1-1- and consequently the character and stock may be readily separated after the backing is secured to the character. In order to completc the die a shank 18 is secured to the backing 15. This shank 18 may be secured to the backing 15 in any suitable way and it may be secured either before or alter the character is separated from the stock. In case the shank is secured to the backing by electrical welding it is prclerably done before the character is separated from the stock as shown in Fig. (5. In order to eompletc the die which is termed from the stock 10 the interior edges of the said die are beveled back from the cutting edge, as shown at 19 in Fig. 5, so as to allow the cuttings to readily pass through the die.

It will be seen that by my process a die and punch are formed by the use of a single master die and punch and that this die and punch must absolutely fit each other as the parts forming the punch are secured to the backing while they are held in position by the stock which is to form the die.

I am aware that it has heretofore been proposed to form punches by soldering the cha 'actcr punched out from the die to a. suitable backing and that it has been proposed that this soldering be done both while the character is held by the stock after having been reinserted into it and after the charactcr has been separated from the stock and while held by other means. Neither of these processes, however, has proved satisfactory in practice and I do not claim the same as any part of my invention.

Having fully described my invent-ion What I claim as new and desire to secure by Letters Patent of the United States, is:

1. The process of forming punches which comprises punching the character from the stock, Without actually separating it therefrom electrically Welding the character to a backing While still held. in position by the stock, and separating the character from the stock.

2. The process of forming punches Which comprises punching the character from the 15 stock, electrically Welding the character to a backing While held in position in the stock by a contact surface greater than the surface to be Welded, and separating the char acter from the stock.

In testimony whereof, I have hereunto set my hand and affixed my seal in the presence of the two subscribing Witnesses.

GEORGE REMNSNIDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 6.,"

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