US504187A

US504187A - underdown

Info

Publication number: US504187A
Authority: US
Publication date: 1893-08-29
Anticipated expiration: 1910-08-29

Description

, J. ZIMMBRM'AN au J1KUNDERD0WN- FOR FBMING TONGUBS IN BLANKS FOR KEYUPBN (No Model.)

Unire *raras JOHN ZIMMERMAN AND JOHN K. UN DERDOWN OF CHICAGO, ILLINOIS, ASSIGN- ORS T THE NATIONAL KEY-OPENING CAN COMPANY, OF SAME PLACE.

PUNCH FOR FORMING TONGUES IN BLANKS FR KEY-OPENING CANS.

SPECIFICATION forming part of Letters Patent No. 504,187, dated August 29, 1893.

Application iiled December 16, 1892. Serial No. 455,354. (No model.)

To all whom t may concern.:

Be it known that we, JOHN ZIMMERMAN and JOHN K. UNDERDOWN, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Punches for Forming Tongues in Blanks for Key-Opening Cans; and we do hereby declare that the followingis 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.

Our invention relates to machines for cutting out the sheet metal blanks used in making what are known as key-opening cans, and more particularly for making that type or kind of key-opening cans which is embraced in Letters Patent No. 486,522, granted to John Zimmerman, one of the applicants, November 22, 1892, and in Letters Patent No. 486,523, also granted to the said Zimmerman on the same date.

The objects of our invention are to produce mechanism by means of which the free lip or tongue of the blank shall be rapidly and economically cut out of the blank, perforated and raised from the blank, and the operation of which shall be such as to enable double quantities of the stock to be simultaneously operated upon; thereby enlarging the productive capacity of the mechanism and still further enhancing the economy of production.

To the above purposes our invention consists in certain peculiar and novel features of t construction and arrangement, as hereinafter described and claimed.

In order that our invention may be fully understood we will proceed to describe it with reference to the accompanying drawings in which- Figure 1 is a vertical longitudinal section of the bed-plate of the machine and its imme# diate operative attachments, and also a front elevation, partly broken away, of the reciprocatory head of the machine and its cutting and puncturing attachments; the section being taken on the irregular line 1--1 of Fig. 2 and the direction of view being rearward, as indicated by the arrows applied to said line. Fig. 2 is a plan view of 'the bed-plate of the machine the bed-plate being partly broken away, and the direction of view being downward, as indicated by the arrows 2 applied to the horizontal broken line in Fig. l. Fig. 3 is an under side plan view ofthe reciprocatory head of the machine and its attachments; the direction of view being upward, as indicated by the arrows 3 applied to the horizontal broken line in Fig. l.v Fig. 4 is a transverse vertical section of the 'reciprocatory head, taken on the line 4-4 of Fig. l; the direction of view being to the right, as indicated byv the arrows applied to said line. Fig. 5 is a transverse vertical section of the reciproca# tory head, taken on the line 5-5 of Fig. l; the direction of view being to the left, as indicated by the arrows applied to said line. Fig. is aplan view of afragmentof the blank as it appears after treatment by the die at the left hand end of the reciprocatory head in Fig. l. Fig. 7 is a plan View of a fragment of the blank as it appears after treatment by the die at the right hand end of the reciprocatory head in Fig. 1.

In the class of hermetically sealed cans, to the manufacture of which our present invention relates, the body sheets of the cans are formed with a free lip or tongue which is a prolongation of a detachable strip of the body sheet or blank, this lip or tongue lapping outside of the opposite edge of the body strip or blank and being soldered thereto, when the` can is formed up, and said lip or tongue being adapted for seizure by an implement or key, when the can is to be opened so as to permit the severance of the detachable strip from the body sheet of the can. For a more perfect understanding of these structural features of the can we again refer to the said prior patents numbered 486,522 and 486,523 previously mentioned. Y

In the accompanying drawings, A designates the bed-plate of the machine, this plate occupying a horizontal position and being supported by any suitable frame-work. In this bed-plate are formed two sockets or cavities a and a. which are preferably of circular form and which are located one beside the other with a suitable distance between them. Within these two sockets are placed the two blocks B and B', these blocks being tted to be supported laterally, but adapted to be deroo pressed in the sockets. A suitable number of spiral springs b placed in thecavities a a below the blocks, aiord the latter suitable yielding support. Upon the upper side ot the bed-plate A is placed a horizontal top-plate C which rests directly upon the bedsplate A and which overlies the cavities a a. Through this top-plate are formedY two openings c and c' which respectively overlie thecavities d and a of the bed-plate A and into which proA trude extensions B2 B3 respectively of the blocks B B; these openings conforming in shape to the cavities a d of the bed-plate. Above the top-plate C is placed a horizontal spacing-plateD which is shown as of approximately T-form, the rear or body portion of the plate extendinglongitudinally of the rear partof thebed-plate A, and an extension CZ protruding forward from the middle of the spacingplate, at right angles thereto, so as to lie between the cavities a and a of the bedplate. Upon the spacing-plate D is laid a face-plate E which may be of similar shape to thatoi the bed-plate` A, and whicl1,owing to the presence of the spacing-plate D, is separated from the bed-plate A by a horizontal space which is centrally divided by the extension d. 'lhisface plate E is formed with two apertures e and e which directly overliethe openings c and c respectively of the top-plateC and also the cavities or sockets a. and ct respectivelyof the" bedplate A, and which conform in shape to s'aid openings and cavities. The top-plate C and faceplate E are retained in position upon the' bed-plate A by any suitable numberot` bolts F having the usual retaining nuts f. The springs l) normally retain theblocks B B in the elevated position with the upper ends of the blocks pressed against the under surface of the top-plate C and with their extensions or bosses B2 B3 within the openings c'cot said top-plate. These bosses B2 B3 constitute dies to act in conjunction with plunger-s carried by the reciprocatory head of the machine, as hereinafter described. The left hand die B2 operates, in conjunction with the left hand plunger, to` perforate the blank, to cut theslits at the sides of the tongue, and

to raise the latter out of the opening, the product being shown in Fig. 6. In this figure G designates a fragment of the blank sheet for a can body and g the tongue. The tongue g lieswithin the body sheet at one edge thereof and is separated from the body sheet by two parallel slits or cuts g the outer en ds of which are convergent, as at g2, wherefore the boss B2 is formed with two parallel sides h to make the slits' g and two convergent sides h2 to make the convergent portions g2 of the slits. Ahole g3 is required in the tongue g near its base, and to form said hole the boss B2isprovided with a vertical cavity h3 to receive a corresponding punch onthe plunger. Owing tothe presence of the parallel sides h of the boss B2, said bossis of elongated form and is also contracted at the opposite end from that end near which thet cavity h3 is formed, and the opening c and aperture e of the top-plate C and face-plate E respectively are of correspending form to that of the boss B2. In order to render the lip or tongue perfectly free at its outer end, the outer ends ot the slits g are subsequently cut away so as to form outwardly divergent margins g4, and this is accomplished by the die B3. For this purpose the die B3 is formed at its front with two forwardly extending triangular or wedge-shaped projections t' the outer inclined sides or edges of which merge with the outer sides of the boss or die and which serve, in conjunction with the right hand plunger, to make the oblique cuts g4; thus removing small triangular or wedge-shaped pieces from the stock or body sheet.

J designates a suitablehead o'r carrier which is mounted above the bed-plate and cap-plate and which is intended to reciprocate Vertically above said plate; triangular projections j being shown at the ends of the' head or carrier, to work in similarly shaped guidegrooves in a framing of any suitable construction.

From the under sideot' this head or carrier ger K operates in conjunction with the die or boss B2, while the plunger L operates in con` c junction with th'e die or boss B3. The plungers K and L are shown as connected together bya coupling-plate J by which said plnngersare steadily held in their proper working position; said coupling-plate being formed with `an upward extension J2 entering the head J and dctachably held therein by a set-screwJ3. The lower end or face of the plunger K is inclined upwardly and forwardly and the two edges or sides k of the plunger are formed parallel with each other so as, inconjunction with the straight parallel edgesor sides 7L of the die B2, to form the parallelcuts'g of the blank.

The rear corners of this plunger are beveled off or inclined, as at 7a2, so as, in conjunction with the inclined edges or sides h2 of the die B2, to form the oblique cuts g2 of the blank.

A stud 7c3 extends downwardly from the frontV springing of the tongue serving toicarry it out of the Vplane of the body sheet', so that it shall properly lap over the adjacent opposite edge of said body sheet. The front edge of the plunger'L is formed with two triangular forward projections Zthe outer margins or IIO IZO

edges of which act in conjunction with the outer margins or edges ofthe projections z' of the die B3, to form the divergent cuts g4 of the blank.

In the operation of the machineabody sheet is first inserted between the top-plate C and face-plateE so as to overlie the cavity a and, as the head J descends, the plunger K makes the parallel cuts g and oblique cuts g2 and also punches the hole g3, and bends the tongue, as at g4. The body sheet is now withdrawn from the machine and reversed, so that its under surface is presented uppermost, and is thus inserted between the top -plate C and face-plate E so as to overlie the cavity 0,. Meantime a fresh body sheet has been inserted between the top-plate and face-plate, and as the head J again descends, the plunger K operates as before, upon the fresh body sheet, while the plunger L is making the divergentcuts g4 in the blank which had been previously operated upon by the plunger J and die B2. Thus it will be seen that we have produced a mechanism for forming key-opening can blanks which is simple in its construction and direct and positive in its operation, and by means of which double quantities of stock can be simultaneously handled.

We claim as our invention- 1. -A machine for forming key-opening-can blanks, comprising a pair of depressible dies formed respectively to accord with the shape of the tongue or lip of the body sheet, and also to the divergent clearing-cuts of said body sheet, and a pair of reciprocatory plungers conforming each in shape to the shape of one of the dies, substantially as set forth.

2. A machine for` forming key-opening-can blanks, comprising a pair of dies one of which is formed to accord with the shape of the lip or tongue of the body sheet, and also recessed for the perforation of said lip or tongue, and the other of which is formed to accord with the divergent clearing-cuts of the body sheet, and a pair of reciprocatory plungers one of which conforms in shape to the first named die and is provided with a projection toenter the recess of the die, and the other of which plungers is formed to accord with the shape of the second die, substantially as set forth.

3. A machine for forming key-opening-can Y or tongue of the body sheet, and the other of which is formed to accord with the divergent clearing-cuts of the body sheet, and a pair of reciprocatory plun gers one of which conforms in shape to the shape of the rst named die and has a beveled portion to raise the lip or tongue, 4and the other plunger of which 1s formed to accord with the shape of the second named die, substantially as set forth.

4. A machine for forming key-opening-can blanks, comprising a pair of depressible dles formed respectively to accord with the shape of the tongue or lip of the body sheet,fand also to the divergent clearing-cuts of said body sheet, a suitably apertured and recessed framing for said dies, and a pair of reciprocatory plungers each according in shape to the shape of one of the dies, substantially as set forth.

5. A machine for forming key-opening-can blanks, comprising a pair of depressible dies formed respectively to accord with the shape of the lip or tongue of the blank, and with the clearing-cuts thereof, and a pair of reciprocatory and simultaneously movable plungers according each in shape'to the shape of one of the dies, substantially as set forth.

6. A- machine for forming key-opening-can blanks, comprising a bed-plate having a pair of recesses or cavities to receive the formingdies, a top-plate overlying the'bed-plate and apertured coincidently with said recesses or cavities, a face-plate overlying the top-plate and apertured coincidently with said topplate, and a spacing-plate interposed between the top-plate and the face-plate, and springsustained die-carrying blocks placed within the cavities of the bed-plate, substantially as set forth.

In testimony that we claim the foregoing as our inventionwe affix our signatures in presence of two witnesses.

JOHN ZIMMERMAN. JOHN K. UNDERDOWN.

Witnesses: Y

C. CLARENCE PooLE, M. E. DAYTON.