Baumfolder BAUM20: Perforating instructions - Manual

When folding right angle folds for book signatures it is
recommended to perforate the paper as it exits the
previous folding station. Perforating the paper creates
consistent, quality folds in the right angle folder.
Perforating creates a weakness or definition in the
paper that assists in folding multiple thicknesses or
against grains in the paper and more importantly
makes air passages in the paper to allow air to escape
during the folding process and eliminate wrinkles and
creases that occur from air pockets. When perforating
you must determine the next application in the
finishing process or the usage of the printed material
by the end recipient. If you are perforating signatures
for books that are to be gathered and stitched on a
saddlestitcher, you will want to use a course
perforating blade that has fewer number of teeth and
creates large slits for the air to escape. If you are
creating mailing pieces with coupons or reply sections
you will want to use a finer tooth perforator blade that
has several perforations per inch.
If you are folding 17x22” sheet in half in the first station
folder and then in half again in the right angle to make
standard 8-page signatures, you will need (1) line of
perforation on the slittershafts on the first station
folder. You will find (3) yellow scribe lines on the tie
bar at the exit of the first station folder. The yellow line
in the center is the approximate center of the folder
and the sheet and is where you can approximate the
location of the perforating accessories for this job.