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3.15.2 Film edge trim rewind unit
This system can be used to remove the film trim strips from longitudinal cutting units which
cannot be handled by the vacuum trim removal unit (see Paragraph 3.11.3.2).
3.15.2.1
Method of Operation
The film trim will be rewound by two electrically-driven motors. These motors will be controlled
by a photoelectric sensor. The motors will start to rewind the trim when the sensor trips.
When the film advance stops, the tension arm lifts until the photoelectric sensor is deactivated
and stops the motor. In this way the tension arm keeps constant tension on the strips.
The wound up trim is easy to dispose of, just take it off the removable reel disks.
3.15.2.2
Routing of edge trim
First run machine until the edge trim is out of the machine by ca. 2 metres then turn off each
motor switch to stop the motors. Route the strip by following the arrows (see Figure 3.34), wrap
up the strips by hand twice around each cone reel, switch on each motor and the motor will
run till the tension arm comes up to release the photoelectric sensor.
Figure 3.34 Film edge trim rewind unit
Removable disk
Cone reel
Motor switch
Tension arm
