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3.11.3 Roll and shear strip cutter
The roll and shear strip cutter separates the packages completely from each other in the
longitudinal direction by removing a 4mm strip from between them. (see Figure 3.24.)
This longitudinal cutting device is mounted on the discharge extension of the machine.
The Roll and Shear strip cutter is suitable for any kind of film or combination (such as rigid
films, multilayer aluminum films, paper and flexible films), and works almost fiber free. Film
gauges up to 1000 µm for bottom web are possible.
3.11.3.1 Limitations
The packaging dept is limited at 120mm, perforation cutting is not possible.
3.11.3.2 Method of Operation
Two circular knives working in opposite directions which overlap at their circumference are
mounted above and below the film level. (see Figure 3.25)
They cut the film at their contact points in the manner of a pair of scissors.
A strip of film about 4 mm wide is cut out between the packages.
In combination with the rigid film puncher, this cutter produces a smooth transition to the
rounded corners (see Figure 3.26)
The cutter is driven by the film transport chain by a chain gear. For the strips a separate
suction unit is needed.
Figure 3.26 double blades for 4mm strip
Figure 3.24 Roll and Shear exchange unit
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