Baumfolder Older Folder - Manual (Page 3)

Baumfolder Corporation
THEORY OF OPERATION
Buckle Folding
As the sheet of stock leaves the register section, it is picked up
by the #1 idler roll and main drive roll and is driven toward the
paper stop in the fold plate. (See figure 1).
When the sheet of stock advances to the point where it strikes
the fold plate paper stop (See figure 2). The leading edge
stops but the remainder of the sheet is still gripped and being
driven by the rollers. Since the sheet of stock is confined in the
fold plates, it buckles in the space between the main drive roll
and the #2 idler roll. As the sheet continues to advance, the
buckle gets longer and is finally picked up between the main
drive roll and the #2 idler roll and is pulled down between them,
forming the fold.
The number of folds to be made is determined by the job
requirements, but the sequence in which the folds are made is
decided by the machine operator. Folding problems may
require stripping and printing changes. Review the Baumfolder
Imposition Manual for additional information on job layout.
Certain types of folds require that the grain of the stock be
“weakened” along the proposed fold line to ensure a
consistently accurate finished piece. This weakening or
breaking down of the paper grain can be done in a number of
ways, with scoring, perforating and wetting being the most
common.
Fold Plates
The numbering of the fold plates is shown in Figure 3.
The two up plates are #1 and #3 and the two down plates are
#2 and #4.
Baumfolder Corporation 1660 Campbell Rd. Sidney, OH 45365 Copyright © 2002
Ph: 1-800-543-6107 Fax: 937-492-7280 email: [email protected]
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