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On a buckle folder, the sheet is laid flat on a register table and then enters the fold pan assembly where it
comes to a stop against the stationary fold plate stop. A series of buckles then forms throughout the sheet. The
buckles whithin the fold pan are kept very small by the narrow channel design. The buckles at the end of the
fold pan, however, will be larger. The fold pans 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.
Look at the figure below. You can see that fold pans #1 and #3 are angled upwards. Because of this
and the configuration of the fold rollers, sheets fed into the #1 and #3 fold pans will always be folded up
(i.e. so that the "up" surface of the sheet is folded into contact with itself).
Likewise, because foldpans #2 and #4 are angled down, sheets fed into them will be down-folds; the
"down" surface of the sheet will be folded into contact with itself.
SHEET
STOP
TP10243-3
DEFLECTOR
CLOSED
4
5
DEFLECTOR
CLOSED
Fold Pan
#1
#2
#3
#4
PAGE 62
DEFLECTOR
OPEN
1
MAIN
2
DRIVE
3
SHEET
STOP
Fold
UP
DOWN
UP
DOWN
DEFLECTOR
OPEN
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