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On this sheet processing machine the sheets
where transported by a frame with several vacuum suckers/ cups. Although the sheets are
separated / fanned by permanent magnetic fanns , destacking must be watched for double
sheets. If double sheets are detected a contact switches in the double sheet detector
amplifier. This contact now repeats the sheet pick - up process again , if necessary
several times to shake off the double sheets. If this is not successful the double sheets
are stored in a special double sheet bin. |