Saddle Stitchers/Bookletmakers — The Finish Line
Saddle stitchers, like bookletmakers, have also seen an explosion in features, such as swing-cut trimmers, feeder adjustments and new control concepts, reveals Felix Stirnimann, division manager, print finishing operations, for Muller Martini.
Down With the Thickness
The Muller Martini Optima saddle stitcher can be used for sizes ranging from small digests, up to double parallels and large tabloids, and can be expanded to 40 feeders to reach speeds of up to 16,000 copies per hour. The company's swing-cut trimmer offers superior trim quality, even with thick products, adds Stirnimann, and features a trim monitor that ensures quality.
"Swing-cut trimmers have been standard in cutters and are widely used in perfect binding, but it is new for saddle stitching," he points out. "Most feeder adjustments, even the feeder timing to the chain, can be made on-the-run from controls on the outside of the feeder. This allows for faster makereadies; settings can be improved in order to gain higher net performance," according to Stirnimann. "A new stitcher control concept is decentralized and offers a touchscreen. The decentralization allows for faster setup and an operator has to do less walking to the main terminal."
Also taking advantage of new advancements in saddle-stitching technology is Heidelberg with its Stitchmaster ST 400 gang-stitcher. Servo-driven mobile feeder units, which can be placed on both sides of the saddle chain, ensure maximum flexibility in production when used in conjunction with integrated, automatic format presetting.
Link to Digital Workflow
The feeder concept and the control are ready-prepared for selected bindings. The SCS 100 communication system enables the Stitchmaster ST 400 to be linked to a digital workflow. A CIP3 interface allows data generated at the impositioning stage of the prepress operations to be loaded into the ST 400's press setting program.
A display with a touchscreen and membrane keypad enables format presettings to be made with ease. It ensures reliable monitoring of all machine functions, from feeding to gathering, to stitching and cutting. Storage of all job data also means that the SCS 100 forms an excellent basis for increasing cost transparency in an end-to-end business workflow.