US1440561A - Method for manufacturing boxes of sheet metal - Google Patents

Description

- W v w a 1V! X SING "WALD, F ZUCKELHAUSEN, NEAR LEIPZIG, GERMANY.

Application filed March 23 T 0 all whom it may concern:

Be it known that 1, MAX Srnonwnrn, a

citizen of the German Republic, residing at Zuclreinausen, near Leipzig. Germs. have invented certain new and use ul 1 grovements in lalethods for l/lannitacturing B xes of Sheet Metal, of which the following is a specification.

fit the manuit' cturing it metal much 'aste is cause l by the tact that the sheet m tal is 51 if d :-4i7;1i1(l;11? i plat-es of d mined s his Waste can be avoided if the box or parts of the san is made in the lollowing manner:

A. plate of sheet metal or waste sheet metal is cut into comparatively narrow strips so that there is no waste. Each of these strips is provided with at least wo grooves.

In order that this invention may be clearly understood, 1 shall proceed to deszribe the same with reference to the accompanying drawing, wherein Fig. 1 shows the strip of sheet metal in plan 'view.

boxes oi sheet Fig. 2 is a cross section of 1.

F 3 shows in elevation the strip of sheet metal at the second stage of manufacture.

Fig. l is a cross section of Fig. 3.

Fig. 5 shows a frame composed of such strips of sheet metal.

Fig. 6 shows at the right hand side in elevation and at the left hand side in section a box of sheet metal with contents.

Referring to Figs. 1 and 2 the strip of? sheet metal comprises three parts a, b, c, and two grooves a, e, separating these flat parts. The grooved sheet metal strips are bent along one of the grooves, for instance along groove 6.7, in such a manner that the arm a is bent at rig t angles to the arms Z), c (Fins. 3 and 1-). A. sheet metal strip of this type possesses increased resistance owing to the groove. The grooved and bent strips are then out at a convenient angle Serial No. 545,086.

as can be seen from Fig. 3 and joined with other strips, cut at the'same angle, to form a frame. The several sheet metal strips 7, g, It, e' (Fig. 5) are preferably connected by welding. A plate 7: of sheet metal is fixed in this frame (preferably by welding). T he article which is thus produced "forms lid or a bottom for a box, the bent oil arm a. serving as rim. The lid or bottom part ol the box thus constructed ensures a great resistance of the box.

Sheet metal boxes oi this type can be used for instance as protecting boxes for the transport of piles of sheet metal plates. Pilesolt' for instance 112 tin plates of 530 by 760 mm, have a weight of to 100 kilograms and they have been packed hitherto in wooden boxes. As atthe unloading the boxes cannot be put down very softly but are thrown down by the cannon the wooden boxes split and splinter so that they cannot be used a second time. Fig. 6 shows a box of sheet metal designed for the transport of tin plates which is capable to withstand very considerable strain during the transport so that it can be used many times.

I claim An improved method for manufacturing boxes of sheet metal consisting in cutting narrow strips of sheet metal, in producing at least two longitudinal grooves in said strips in bending off at right angles each strip along one of the grooves, in cutting the ends of said strips at a desired angle, in joining four strips together by welding in order to form a frame and in covering said frame by a plate of sheet metal fixed by welding. I

In testimony whereof I my signature in presence of two witnesses.

MAX SINGEVVALD.

Witnesses:

RUDOLPH. FRIOKE, h IARGARET MENZEL.

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