Paper Folding
SM 103 D454
Multi-Folding
Unit FD5000
D454
2.3 PAPER FOLDING
2.3.1 FLEX-NIP FOLDING
This machine uses the flex-nip method to fold paper.
In this method of folding a stopper fence { is raised or lowered to the correct height for the
size of the paper and the type of fold to be done. A sheet of paper | descends, hits the
stopper and stops. However, the upstream rollers continue to rotate. This causes the paper
~ to bulge and flex toward the nip of the rotating fold rollers on the left. When the paper
reaches the rotating rollers it feeds into the nip. The rollers catch the paper, pull it into the nip,
and form the fold.
In this machine:
There are three fold stoppers placed at strategic positions in the fold path.
Not all the stoppers are used for folding. Only the stoppers needed for the type of
folding are used.
When two or more sheets are fed together, a fold assist plate { pushes the flexed paper
toward the rotating fold rollers. The fold plate is used only when more than one sheet of
paper is fed at a time. Up to three sheets can be fed.
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