US518724A - die for cutting and shaping can-heads - Google Patents

Description

(No Model.) 2 Sheets-Sheet 2.

B. W. MORFOOT. DIE FOR CUTTING-AND SHAPING CAN HEADS. No. 518,724. Patented Apr. 24, 1894.

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UNITED STATES PATENT OFFICE.

BENJAMIN W. MORFOOT, OF CHICAGO, ILLINOIS.

DIE FOR CUTTING AND SHAPING CAN-HEADS.

SPECIFICATION forming part of Letters Patent No. 518,724, dated April 24, 1894- Application filed August 4, 1893- To all whom it may concern.-

Be it known that I, BENJAMIN W. MORFOOT, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Dies for Cutting and Shaping Can-Heads havingDetachable Strips; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. r r

The invention has for its object to provide a practical construction in dies for preparing, at a single stroke from a flat-sheet of metal, flanged can heads having an annular detachable strip in its flat face, which strip has an outward extension terminating in a free plongiue which'extends beyond the flange of the In the accompanying drawings which illustrate my invention, Figure 1 is a plan of the blank as out by the dies during the first part of their inoperative movement. Fig. 2 is a perspective of the completed can head as finished by the dies in their complete operative movement. Fig. Sis a face View of the lower or matrix die. Fig. 4 is a section in the line 4-4 of Fig. 3. Fig. 5 is a face view of the upper or punch die. Fig. 6 is a section in the line 6-6 of Fig. 5. Fig.7 is an enlarged detail showing the separate block inserted in the matrix die. .Fig. 8 is a detached view of said separate block of the matrix die. Fig.

9 is a face View of the separate tongue punch of the cutting and forming or upper punch die, and Fig. 10 is a side View of the added tongue punch, detached.

A represents the blank as cut from a flat sheet of tin or otherv metal during the first part of the movement ofthe dies and before the formation of the flange or of the Weakened lines therein, and B the completed flanged cover provided with the weakened lines I) b as it emerges from the dies after their full operative movement.

B designates the flange and B represents the protruding tongue formed on the blank. The two parallel concentric weakened lines b b form the borders of the body of the detachable strip B of the completed can head, and each of said weakened lines 6 b has an outwardly directed prolongation, (b I), respectively,) preferably tangential to ts general course and also preferably termlnatlng in a slit b which is continuous with the adj acent side edge of the tongue B and which slit extends either partially or wholly across the flange B of the completed can head. hen

the outer of said weakened lines, I), is at the angle of the flange with the body of the head, the deflected or tangential prolongation thereof will of course be obliterated if the slit extends to said line, but this construction is intended to be included in my appended claims. It will be observed that the inner of the two weakened lines, I), is continuous but that the outer line b extends only to the opposite sides of the deflection or branch of the detachable strip.

When the coverB is applied to the can body it is placed externally upon the latter and the tongue B or its end portion at least, is free to be seized bya suitable instrument for tearing out the detachable strip. The slits 1) extending into or across the flange of the cover facilitate the starting of the detachable strip and also favor the admission of solder beneath the tongue in soldering the head to the body. Now describing the dies by which this can head is formed, C represents the lower or matrix die and D the upper or punch the. The die C comprises the outer annular portion 0' the inner edge of which assists in cutting the outer circular edge of the blank A before said blank is bent. This annular portion C of the die C contains the recess C the edges of which assist in cutting the tongue 13 of said blank. \Vithin the annular portion C and removed therefrom by a space 0 equal to the proposed depth of the flange B of the can head is a concentric, central portion C the outer edge of which is a continuous circle, this center C being somewhat below the plane of the outer portion C. The edge 0' of the central hole C is concerned in cutting the filling hole a in the cover. The

upper or punch member of the die comprises the raised cutting and forming rim D together with the lateral, andin this case tangential, branch or punch D the former fitting as a punch within the ring C and the latter as a punch within the recess C of the opposite die D so as to cutthe blank A from a sheet. The inner edge of the rim D fits as a former over the raised part C of the die C so as to form the flange B of the can head by bending down the edge of the blank A into the recess 0. The die D is further shown as having the central punch D which fits the hole O of the die 0. The bringing together of the members of the die, as so far described, therefore first cuts thejblank A of Fig. 1 and second cuts the filling hole and turns down the flange and the tongue of the blank to form the cam head of Fig. 2. The depressed surface of the recess D of the punch die D and the raised surface C of the matrix die 0 have opposing grooves and ribs for producing the weakened lines already described as present in the can head. Preferably, as I have found, the ribs are on the raised surface of the member 0 and the grooves on the opposing depressed surface of the die D, and they are so herein shown, 0 0 being the circular portions of said ribs and c c the deflected or tangential extensions ofsaid ribs. Oorrespondingly d d are the opposing grooves in the upper die member D and d d the deflected or tangential extensions of said grooves. As a preferable construction the matrix die 0 is composed of three parts, to wit, the outer annular portion 0, the inner portion 0 and the separate part 0 bearing the straight or deflected portions 0 and c of the ribs which are concerned in forming the weakened lines, said third part C being inserted in a marginal notch or recess cut in the main central portion of the die, as shown in Fig. 3 and in the detail Fig. 7. This block 0 is shown detached in Fig. 8 and it is desirably held firmly in place by a screw 0 inserted laterally through it into the other part of the central portion of the die. The punch die D, if including the center punch D is preferably formed in three parts, to wit, the main circular portion D D the tongue punch D and the center punch D The tongue punch D is shown detached in Figs. 9 and 10, in which,Fig. 9 is atop View, and Fig. 10 a side view. This tongue punch D is desirably more elevated than the surface of the body of the die to which it belongs and therefore is shown as having an overhanging lip 01 which, when in place, rests upon the marginal cutting and forming rim D, and will usually terminate flush with the inner edge of said rim. The holding block D for the die D is recessed, as shown in the sectional Fig. 6, to receive the die, said holding block being provided with the lugs D and D between which the tonguepunch D is secured by one or more set screws d If the die is constructed, as shown, to form the filling hole a in the can head, the die members are also adapted, as indicated, to form the usual groove to receive the edge of the cap which is to be applied after the can has received its contents.

By the construction of the members of the die in parts, as above described, its cost is materially lessened. For example, the main may be first central portion of the die carrying the ribs given a complete circular form by turning in a lathe and the ribs may also be turned continuously thereon and then a portion of the die may be cut out to receive the block 0 which carries the tangential or otherwise deflected portions of said ribs which may also be more simply and inexpensively formed on a separate piece by planing or otherwise. In the opposite member the grooves may be made continuous by turning and the deflected or tangential portions subsequently planed or cut therein.

The periphery may also be turned to a circle, the tongue punch being separately made and secured in its proper place in the manner described. In the case of a square can which invariably has rounded corners, each corner portion of the die may be a separate inset segmental piece in or upon which the grooves or ribs may be formed by turning, the straight portions of said ribs or grooves being formed on the body of the die by planing.

The construction of the can head having the weakened lines and depending tongue, as

herein shown and described, forms the subject of a separate application for patent, Serial No. 475,902, filed May 29, 1893. The only departure here made from the construction therein described consists in the provision of the slits b in continuation of the side edges of the tongue partially or wholly across the flange B. These slits are formed by the die above described although there are no cutting edges opposed to the overlapping lip 61 of the punch D I claim herein the can head having this added feature as a characteristic of the product of the die described when provided with the elevated tongue punch having the inward extension. By making the tongue punch D with its face in the same plane with that of the cutting and forming rim D these slits b will not be produced, and I, therefore, make a special claim intended to cover the construction of the die in which the tongue punch is elevated, as distinguished from other claims under which it may or may not be thus raised.

I claim as my invention- 1. The can head, cutting and bending dies described, having the recess and punch for forming the tongue and, upon the surface of one of the members, the ribs adapted to form weakened lines in the top of the cover and branches thereof directed to the edges of the tongue-formin g devices.

2. The can head, cutting and bending dies described, having the recess and punch for forming the tongue and, upon one member, ribs and in the opposing member grooves, adapted to form parallel weakened lines in the top of the cover and branches thereof directed to the edges of the tongue-forming devices.

3. The die member 0 having the rim 0' provided with the outwardly directed recess 0 in combination with the opposing membcrD ICC having the rim D and the punch D the latter fitted to co-act with the'recess C to form the tongue on the can cover.

4. The die member 0 having the rim 0 provided with the recess 0 in combination with the opposing member D having the rim D and the punch D the latter projecting beyond the face of the rim D and being fitted 'to the recess 0 substantially as and for the purposes set forth.

5. The die memberO having the rim 0 provided with the recess 0 and having also the less raised center separated from the rim 0' by the annular space a, in combination with the opposing memberD provided with the rim D adapted to enter the space 0 and provided with the branch D adapted to enter the re cess C the opposing members being provided one with ribs and the other with grooves having branches directed to the edges of the said branch punch D and recess 0 substantially as and for the purposes set forth.

6. The die member having the branched ribs for forming weakened lines in a metal sheet, the branches of said ribs being formed on a piece separate from the body of the die and suitably fastened in place, in combination with an opposing die member, the whole being adapted for cutting and forminga can head having weakened lines tachable strip.

7. The die member D having the rim D and the tongue punch D formed of a separate piece secured in place, in combination with an opposing die member, the whole being for producing a decutting and forming a can head having a de-v

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