Ricoh D454-17, Manual

Page: 136 / 164

Paper Folding
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
Á
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.
2. Details
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