DE368994C - Folding device for cans - Google Patents

Description

ISSUED FEBRUARY 13, 1923

There are already automatic folding devices for cans are known in which there are two nested folding rollers seated on a movable carrier are. With these automatic folding devices but if the fac rollers are relentlessly closed by a lever movement, so that they do not serve the unevenness in the fold e.g. the can-turn seam and different Strengths of too! adjust the closing fold and therefore no secure closing guarantee.

According to the invention, the closing of the folding rollers caused by a spring, which causes the folding rollers to dodge when It is allowed to tire on bumps in the fold or in the case of stronger folds while opening the folding rollers by canceling the spring action reaches wind.

In the drawing is the new fastening device shown in an exemplary embodiment, namely show:

Fig. Ι a vertical section in the sealing position, '

Fig. 2 is a top view in the same position,

Fig. 3 is a front view in the first working position,

Fig. 4 the same view in the sealing cap position, the

Fig. 5, 6 and 7 the fold in different working hours.

The folding device can be present on every

308904

which can sealing machine, in particular be attached to those for folding food cans with high shelf lids.

The arm b, in which the bolt c is provided, on which the carrier d is mounted so that it can swing horizontally, sits on the casting a, with which the folding device is fixed to the can sealing machine with a vertical rotary movement (arrow direction x, Fig. I).

> o gert is.

On the front part of the carrier d , the housing e is arranged, in which the folding roller f, which is designed as a hollow body, is rotatably mounted with its tubular extension f ^1. In this folding roller f , the folding roller g combined with the axis g ^{1 is} rotatable and inserted in a flexible manner in the longitudinal axis. The roller g engages under the tube part f ¹ , so that through the upper part aiuis the housing «? zo reaching parts of the axis g ¹ attached nuts h both Fafcrollen / and g are held in the housing e . Underneath the nuts h , the washer i provided with a bracket i ¹ is loosely arranged uim the axis g " ¹ , under which a spring k , which is supported on the extension e ^{1 of} the housing e and tends to move the rollers / and g in to hold their normal position in the housing e.

A horizontally protruding arm q is attached to the casting, which is provided with a downwardly projecting short sliding surface r which, in the first working position of the rollers, engages the upper part of the bracket i ¹ which forms a track s.

To achieve a slight rotational movement, a ball ring 0 can be arranged for the roller / a ball ring p for the roller g .

On the upper surface g ^{2 of} the roller g, a number of thin disks I are placed around the axis g ¹ , which serve to compensate for the wear and tear of the roller.

The folding rollers are pressed on by the lever m arranged on the rear part of the carrier d.

The working process is as follows: After the can to be closed is fixed in the machine, the lever m is pulled so that the folding rollers f and g are brought into the folding position by the rotation of the carrier d around the bolt c. During this movement, the track s of ^{the bracket H 1} pushes itself under the surface r of the arm q, which pushes the disk i downwards and compresses the spring k (Fig. 3). As a result, the effect of the spring k on the roller g is canceled to such an extent that the roller g can lower somewhat in the direction of its longitudinal axis, as a result of which the groove η is correspondingly widened. The fold is now first pressed into this widened groove η . It therefore folds over loosely, which prevents compression in the fold (Fig. 5) If the fold is loosely turned completely in the groove η , the track s has deviated from the attachment surface r due to further pressing movement of the carrier d (Fig . 4), and the spring k pushes the RoIe g back into the extreme upper position, whereby the groove η becomes correspondingly narrower. This results in the sealing of the fold (Fig. 6), but the rollers automatically adapt to the different thicknesses of the fold, since the roller g gives way against the pressure of the spring k in the longitudinal axis. The fold (Fig. 7) is folded over by moving the carrier at an angle to the can axis (arrow direction x, Fig. 1).

By the present arrangement, a mechanical work output · to be achieved during the closing of cans, by automatic ⁴ adjusting the folding rollers during the folding and sealing closure of the can rims under automatic consideration of the various Falzstärken, or for any unevenness occurring in the rebate. B. the fuselage is soldered.

A gradual widening of the groove η go takes place as a result of the wear of the rollers f and g. This wear can be compensated for by removing one or more disks I from the axis g ¹ .

Claims (1)

Patent claim: Folding device for cans, characterized in that the lower folding roller (§ ·) is carried by a · bracket (i ¹ ) which, when the folding rollers (f, g) are pressed against the workpiece for the first time, slides under a wedge surface (r) which it contrary to the action of a spring (^) downwards and thus presses the lower folding roller (§ ■) into the open position to the upper folding roller (f) in order to initially fold the fold loosely, whereupon the bracket (i ¹ ) of of the kerf surface (r) so that the rabbets close flexibly under the action of the spring (Ji) and automatically adapt to the various thicknesses and unevenness in the fold when the fold is compressed. For this purpose ι sheet of drawings.