US284584A - wright - Google Patents

Description

(No Model.) 2 Sheets-Shefi; 1.

0. WRIGHT. V SHEET METAL SEAMING MACHINE.

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G. WRIGHT.

SHEET METAL SEAMING MACHINE;

N0. 284,584. Patented Sept. 4, 1883. I

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UNITED STATES PATENT OFFICE.

CALEB \VRIGHT, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO JOSEPH B. ROHRMAN, OF SAME PLACE.

SHEET-M ETA-L-SEAMINIG MACHINE.

SPECIFICATION forming part of Letters Patent No. 284,584, dated September 4, 1883.

' Application filed June 11, 1853. (No model.)

T ail whom it may concern:

Be it known that I, OA-LEB WRIGHT, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Sheet-Metal-Seaming Machines,

of which the following is a specification.

The object of my invention is to construct a machine for rapidly and effectively double seaming the j oints of sheet-metal cans orboxes 1o of square or other angular shape; and this obj ect I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figures 1, 2, and 3, Sheet 1, are diagrams illustrating the character of the work to be performed by the machine, only those parts of the machine necessary to an explanation of the operations being shown in these views. Fig. 4, Sheet 1, is a longitudinal section. Fig. 5 is a detached view, and Figs. 6 and 7, Sheet 2, are respectively a front view and a plan View of an organized machine constructed in accordance with my invention.

In Figs. 1 and 2, 00 m represent the sides of a can, and in Fig. 3 y represents the bottom of the same, the shape of the can in the present instance being quadrangular.

Before being subjected to the action of my machine, the corners of the can are united by single-scan1ingthat is to say, a plain flange on one edge of one side sheet is adapted to a hooked flange on the adjoining edge of the next side sheet, as shown in Fig. 1,the duty of the machine being to bend down these single seams against the sides of the can, so as to form a double seam. The can, having its corners single-seamed, is

laid upon the table or bed A of the machine, the

rear seam of the can bearing against a grooved gagebar, B, on the bed, and the latter being so adjustedthat the front seam overhangs the front edge of the table, as shown in Fig. 1, a block, D, being then inserted inside the can close against the front side of the same and clamped down, so as to hold the can firmly to the.tab1e.

A bar, F, is pivoted at its opposite ends to the table A, the centers oflthe pivots being in line with the top and front edges of the table, said bar resting against the front edge of the table when depressed, and having an upper face flush with the top of the table. This bar F has a handle, a, and when said handle is drawn up, as shown by the arrow in Fig. 1, the upper face of the bar acts upon the overhanging seam of the can and presses the same 5 5 up against the side of the can, as shown in Fig. 2. The bar F is then depressed, the block D removed, and the can readjusted prior to a repetition of the operation in connection with another corner seam. WVhen the bottom or top 6 3 yof the can is to be seamed to the sides, however, as shown in-Figu3, the block D cannot be used; and in this case I use a block, G, adapted to rest upon said bottom or top plate, and to fit snugly to the inside of the can, the 6 block being held in place vertically by a rod, 1), pivoted at the upper end, and adapted to bear upon the-block G some distance in ad- Vance of a vertical line drawn through the pivot, so that the tendency of the rod is to be 0 self-tightening when any backward pressure is exerted upon the block, the rod being free to swing upward when the can is removed from the table. The bottom is single-seamed, as before, and the double-seaming is effected 7 by the bar F in the same manner as in forming the corner seams, one side after another being acted upon until the operation is completed.

The manner in which I prefer to construct and operate the various parts above-described is shown in Figs. 4, 5, 6, and 7.

The gage-bar B slides on the top of the table A, and is confined vertically and laterally bolts being adapted to and free to slide i-nlongitudinal -shaped grooves e in the bed. The adjustment of the gage-bar is effected by set screws f, which are adapted to threaded lugs f on the rear edge of the table, the points of 0 the screws bearing against the rear edge of the gage, and said screws thus serving not only toadjust the bar, but also to resist the thrust eX- erted upon the same when the bar F is bending the front seam. length equal to the width of the largest can to be seamed upon the machine, so that it will bear throughout upon that edge of the sheet opposite to the edge which is being acted upon thereto by bolts (1 and nuts d,the heads of the The gage-bar Bis of a 5 by the bending-bar, and in order to effectually 10o springs 2" serving to retract the levers when pressure is removed from the treadle. The block D is loose and disconnected from the table A or levers H, in order that it may be readily removed when all four edges of the can have been seamed.

The bending-bar F is hung to lugs m on'the bed, and'the acting edge a of said bar is beveled in opposite directions from the center to each end, as shown in Fig. 6, and from edge to edge, as shown in Fig. 4, the object of thus beveling the bar being to distribute the strain on the same during the bending operation, and to compensate for the springing of the metal of the can under the action of the bar, and being secured by a set-screw, t.

The retainingrod b is secured by set-screws to a bar, 1;, pivoted at the ends to standards P on the table, the rod being adjustable in respect to the bar, so as to bear properlyupon blocks of diiferent thicknesses, and the posts being adjustable longitudinally, as shown in Fig. 5, as may be demanded by cans of differeut sizes, the posts being secured in position after adjustment by bolts 2), adapted to slots 22 in the posts. j

The table A, clamp-block D, and bendinghar F'are all slotted for the reception of the ribs or flanges with which the sides of cans are sometimes provided.

Instead of employing a self-tightening rod, 1), for the purpose of retaining the block G, a

rod acted upon by cams orby ascrew carried by the bar 19 may be employed, the device shown being preferred, however, as the simplest.

I claim as my invention 1. The combination of the table A and the pivoted bending-bar F with the disconnected clamping-blockD and with means for depressing the same, as set forth.

2. The combination of the table A, the bending-bar, and the clamping-block with the gagebar B, constructed to bear throughout upon vthat edge of the sheet opposite to the edge which is being bent, and combined near each end with a clamping-bolt, d, and a set-screw, f, the latter being adapted to lugs on the table and bearing on the rear edge of the bar, as set forth.

3. The combination of the table A and clamp ing-block with a pivoted bending-bar, F, the

acting face of which is beveled in opposite di f rections from the center to each end, as set forth 4. The combination of the table A, the pivoted bending-bar F, and the clamping-block G with the pivoted retaining rod b, as set forth.

5. The combination of the table A, the pivoted bending-bar F, the block G, the adjustable posts P, the bar 1), pivoted thereto, and the retaining-rod b, adjustable in said bar 1), as set forth.

In testimony whereof Ihave signed my name to this Specification in the presence of two subscribing witnesses.

XVitnesses:

JOHN E. PARKER, HARRY SMITH.

CALEB WRIGHT.

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