Cutting – Tool engages work during dwell of intermittent workfeed – With uninterrupted flow of work from supply source
Patent
1995-06-07
1997-12-23
Peterson, Kenneth E.
Cutting
Tool engages work during dwell of intermittent workfeed
With uninterrupted flow of work from supply source
83262, 83268, 834671, B26D 701
Patent
active
056997094
DESCRIPTION:
BRIEF SUMMARY
PRIOR ART
The invention is directed to a device for severing packing strips having blisters from a continuous film. In a device of this type, known for example from DE 32 08 265 A1, a continuous film which is filled with tablets or the like and sealed with a covering film is conveyed by means of rollers step by step in each case by at least the width of a packing strip into the region of a stamping device. In the stamping device, individual packing strips are severed from the continuous film by means of a stamping punch and are fed, by means of a suction device, to a transport belt for further processing. In the case of the known device, it is disadvantageous that, as a result of the expansion behavior of the plastic films used for the continuous film, an offset can occur between the shaping and transport devices for the continuous film and the stamping device, in particular in the case of a change of film, as well as in the case of changing processing temperatures or inhomogeneities of the film. The result is an eccentric stamping pattern of the packing strip, so that the blisters are no longer arranged centrally in the packing strip. In comparison, both on functional grounds and on optical grounds, it is desirable that the blisters are always arranged at the locations envisaged for them, for example with the same edge spacings, within the packing strip.
ADVANTAGES OF THE INVENTION
In contrast, the device according to the invention for severing packing strips having blisters from a continuous film, has the advantage that the blisters are always arranged in the intended locations within the packing strip.
Further advantages of the device according to the invention are obvious herein from the description. By means of the formation of a buffer region for a part of the continuous film, both expansions and shrinkages of the continuous film can be compensated for. The blisters are positioned especially accurately and reliably within the packing strip if the shape of the stop is matched to the peripheral shape of the blisters. Furthermore, it is advantageous if the stop is arranged interchangeably on the device. By this means, a particularly simple matching to various blister shapes or arrangements of the blisters in the continuous film can be achieved.
DRAWING
An exemplary embodiment of the invention is shown in the drawing and is explained in more detail in the following description.
FIG. 1 shows a device for severing packing strips having blisters from a continuous film, simplified in side view, and
FIG. 2 shows a top view of packing strip.
DESCRIPTION OF THE EXEMPLARY EMBODIMENT
The device for severing packing strips 11 having blisters 10 from a continuous film 12, which is formed from a lower film 13 and a covering film 14, adjoins a filling and sealing device of a packaging machine, not shown. In carrying out the invention, a deep drawing process is used. A deep drawing process is one in which a flat plate or flat sheet is converted into a simple three-dimensional shaped body. There, using the deep drawing process, blisters 10 are formed in the lower film 13, said blisters are filled, for example with tablets or the like, and the lower film 13 is subsequently sealed with the covering film 14. The continuous film 12 thus formed passes into a transport roller 15, in which cutouts 16 are formed, which receive the blisters 10 in a positive manner. In the entry region of the transport roller 15, there is arranged a nip roller 17 for guiding the continuous film 12 into the transport roller 15. Instead of the transport roller 15, however, advance devices of other designs are also conceivable for the continuous film 12. The transport roller 15 conveys the continuous film 12, in each case by the width of a packing strip 11 to be severed, step by step into a stamping device 20 arranged at a spacing from the transport roller 15 which is determined by several packing strip widths. Between the transport roller 15 and the stamping device 20, there are arranged, for the broad sides of the continuous film 12, gu
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Heinisch Ulrich
Krieger Eberhard
Scheifele Horst
Wentsch Siegfried
Greigg Edwin E.
Greigg Ronald E.
Peterson Kenneth E.
Pryor Sean A.
Robert & Bosch GmbH
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