MBM Corporation 352SA automatic air suction folder with Register System - Manual (Page 61)

Operator's Manual multimaster CAS 35 PBA Perforating - Scoring - Slitting
62 Mathias Bäuerle GmbH
Perforating Various perforating knives are available which differ in the type and number of teeth.
Their usage is determined by the type of paper and the kind of perforating job.
Thin paper: short cuts, many teeth
Heavy paper: long cuts, few teeth
There are two general types of perforations:
1.) Push-through
Push-through perforations 9.100.356 and 9.1001.357 run in the groove of a roller.
Make sure that the perforating knife runs exactly in the center of the groove of
its counterpart.
If the setting is not precise, this may lead to inaccurate perforations and premature
wear of the tools.
2.) Knife
The counterpart of knife perforations 9.100.358, 9.100.359 and 9.100.360 is a
rotary knife.
Position the upper and lower tools so that they touch each other lightly like the
two knives of a pair of scissors.