Baumfolder Flexifold: 2st Station (in 2004) - Manual (Page 41)

PAGE 41 TP10495
On a buckle folder, the sheet is laid flat on a feed table
and then enters the fold plate assembly where it comes to a
stop against the stationary sheet stop. A series of buckles
then forms throughout the sheet. The buckles whithin the
fold plate are kept very small by the narrow channel design.
The buckles at the end of the fold plate, however, will be
larger. The fold plates and fold rollers are configured such
that the large buckle will always form downward, where it
can be grabbed by the fold rollers and compressed into a
fold.
FIGURE 1
Fold Pan Fold
#1 UP
#2 DOWN
Look at figure 1. You can see that fold plate #1 is
angled upwards. Because of this and the configuration of
the fold rollers, sheets fed into the #1 plate will always be
folded up (i.e. so that the “up” surface of the sheet is folded
into contact with itself).
Likewise, because fold plate #2 is angled down, sheets
fed into it will be down-folds; the “down” surface of the
sheet will be folded into contact with itself. The picture
shows the plate #2 deflector in position. The sheet does not
enter plate #2, deflected, producing a single fold.