The module is integrated into a folder in the press presetting and control systems which can dramatically shorten changeover times when production entails frequent edition changes, KBA says.
The dual quarterfold module has just one pick-up station, so that it is possible to choose one of two delivery options, depending on the type of copy: delivery after the first cross fold or after the double quarterfold unit following quick and easy manual conversion of the copy stream diverter.
It is available as a slip-in module for all KBA folders from the KF 3B to the heavy-duty KF 7.
The new module works by following the former fold (first length fold) and the first cross fold, with the copy stream conveyed by belt systems to a controlled diverter, which splits it into two.
The two streams are then decelerated and guided to the stops at two separate chopper tables, where a folding blade is actuated that thrusts the raw copies between two folding rollers to create the quarterfold.
The copies are subsequently guided by two belt systems into an 18-pocket paddle wheel and are delivered in a single stream. Copy spacing in the stream can be adjusted to the speed of the relevant finishing equipment.
Fitting two quarterfold units in one module and splitting the copy stream largely eliminates the process-related speed limitations imposed by single quarterfold systems, KBA says.
“This means that the press can be run at high speed when printing magazine-format copies, with no impairment to folding precision or delivery accuracy.”
