DE55746C - Blank cartridge and its manufacture - Google Patents

Description

IMPERIAL

PATENT OFFICE.

in Dresden.

The invention relates to the design and manufacture of blank cartridges and aims to simplify them and make them cheaper, without affecting the usefulness of the Blank cartridges suffered a buff.

In order to achieve this purpose, the blank cartridge is given the shape shown in FIG. 1, which is characterized by the following:

In the cartridge case α a sleeve b is inserted, which is made of cardboard and stiffened by a metal ring, which at the same time surrounds the lower surface and the edge of the flange on the sleeve. The anvil is fastened in the sleeve b by the fact that its edge, broadened like a disk, cuts deeply into the wall of the sleeve and is under strong pressure here, so that the anvil. and the sleeve behave like a rigid body against the material of the firing pin of the rifle lock. The connection between the rifle and the cartridge case mediate in the metal cladding of the former screwed grooves into which the softer material of the case is pressed.

The workpiece for making the anvil bushing b is: 1. a cardboard or paper cylinder b, FIG. 3, which is slightly larger in length and diameter than the finished bushing: 2. a metal ring, FIG. 4, whose inside width is the same Diameter of cylinder b, Fig. 3; 3. a flat-arched metal disc i ¹ , FIG. 5, which has been prepared for the anvil insofar as it shows a dome-shaped elevation in the middle. Its diameter is equal to the inside width of the cylinder b, FIG. 3.

The anvil bushing is produced by means of two punching devices, FIGS. 7 and 9. Both consist of a punch, a punch and a mandrel onto which the cardboard cylinder b is placed.

In the punching device Fig. 7, the punch has a cylindrical bore, which is slightly rounded at its upper edge, the punch has a path which corresponds to the shape of the disc b \ Fig. 5, and the mandrel d has an effective length which is so dimensioned , that the laid him slices b ^l its proper place in Pappcylinder receives. The upper part d ^{1 of} the spine d is somewhat weakened, while maintaining a gradual transition from the lower stronger to the upper weaker part.

The cylinder b provided with the metal ring c according to FIG. 7 and placed on the mandrel d is, after the punch e has been placed on it, driven into the punch / so far that only its end protruding beyond the disc b ¹ protrudes from the punch.

As a result, 1. the cylinder b below the disc b ¹ is narrowed on its part lying in the area of the weakened end of the mandrel d, so that the disc b ^l now receives a support in the cardboard wall itself and at the same time cuts a little into this with its edge, and 2. the metal ring c contracted and driven into the cardboard wall b until it protrudes beyond the punch

Claims (1)

End that maintains its original width. In the punching device Fig. 9, by means of which the further processing of the cylinder b takes place, the punch i is turned in sharply at the top, the mandrel g sharply set off at the transition from the stronger to the weaker part g ^1, and the punch with one of the desired shape of the anvil corresponding path. The driving of the cylinder b into the punch takes place here until the shoulder of the punch touches the surface of the punch. In this way 1. the anvil of the disc is formed and its edge is flattened and stretched, whereby it penetrates deeper into the cardboard wall, and 2. the part of the cylinder b protruding in Fig. 7 is converted into a flange, the edge and rear surface of which are clad with metal . Grooves of triangular cross-section are then worked into the metal ring c of the cylinder b, which has been formed into an anvil bushing (see FIG. 10). To complete the blank, the sleeve ^{beb 1 is} finally inserted into the sleeve a and this is pressed into an annular shape. As a result, the softer material of the sleeve penetrates into the grooves of the metal ring c hardened by machining and the sleeve and sleeve are firmly connected to one another. One can also, the punching device Fig. 7 modify meaning is that after Fig. 8 the punch e ¹ gives a plain sheet and the disks i ^»1 to geschehener punching working b on the space formed by them in the Pappcylinder article ² hangs up. The further processing takes place, as before, by a punching device according to FIG. 9. Pa te ν τ-An s ρ odor: ι. A blank cartridge in which the anvil for the primer is connected as a special disk to the paper or cardboard can (b) in that the widened edge of the disk cuts deeply into the wall of the can and is under strong pressure here The wall of the bushing is stiffened by a metal ring (c) pressed into it, which at the same time surrounds its flange-shaped edge.,
2. The production of the cylinder designated under 1. (bb ^l c) in such a way that:
a) the cardboard cylinder (Fig. 6) provided with the smooth metal ring (Fig. 4) is placed on a mandrel (dd ¹ ) and, with the application of a stamp (e or e ^l ) (Fig. 7 or 8), is inserted into a punch (f ) is driven, whereby below the disc (b ^l ) the cardboard cylinder narrows and the metal ring (c) into the. Cardboard wall is pressed into;
. b) the so far pre-worked cylinder (bb ^l c) is driven into a second punch (i) provided with a sharp indentation using a dome (gg ¹ ) and a punch (h) corresponding to the desired shape of the anvil, whereby the edge of the Anvil disc (b ¹ ) is pressed firmly into the cardboard wall and this is transferred at the top into a flange covered by the metal ring on the edge and on the back (Fig. 9). For this purpose ι sheet of drawings.