Formax FD 372 - Manual (Page 17)

17
(C) Cross Folding
Cross folding refers to performing the double parallel,
letter, or other types of folds for the sheets of paper
folded using the single fold method.
Example:
11”x 17” folded in half and then letter folded to
fit into a standard # 10 envelope.
Note:
The maximum weight of paper that can be used for
cross folding is 28 #.
This requirement, however, varies according to the
following conditions:
Paper type; Paper size;
Whether grains run lengthways or sideways;
Temperature and relative humidity;
Printing condition.
The folding position may be displaced to a greater
extent than when the paper is folded using a regular
fold method, or a corner of the folded paper may be
folded inside as indicated in the figure. These,
however, do not mean that the machine has broken
down.
Note:
Press the crease hard using the hand. Do not stack too
many sheets of paper on the paper feed table.