Saddle Stitchers — A Staple of Fine Finishing
The 10,000 cph Vijuk 321-T saddle stitcher features adjustable gripper and suction pickup at 1:1 and 1:2 feeding ratios; and missing- and double-sheet detection. It also features oblique sheet monitor and spine caliper; on-the-fly adjustable cover scorer/folder/feeder; Hohner/flying stitching system with missing-stitch detection; single-assembly knife changes on trimmer; and two-up production.
Muller Martini offers a large, encompassing range of stitching solutions, led by the 20,000 cph Tempo for high-performance operation and selective binding. Its Optima line is versatile, expandable and offers CIP3 integration. The Prima family offers the S, AMRYS (automatic makeready system) and SB selective binding solutions, all rated at 14,000 per hour.
Other offerings from Muller Martini include the mid-range Bravo-S (12,000 cph) and Bravo-T (11,000 cph) with twin feeders. The compact Presto is rated at 9,000 cph, and the Valore churns out 6,000 cph.
When it comes to stitching heads, the goal is to provide an extremely low-maintenance solution, according to Tom Hagemann, product manager for ISP Stitching. "We find that people are neglectful in wanting to lubricate things," he remarks. "And the ease of adjustment is very important."
ISP's primary solution is the M2000 stitching head. It features a reduced operating force, which maximizes the interval between maintenance functions. The M2000 boasts wear-resistant components for extended stitcher life and a felt wire oiler/cleaner that cleans and lubricates, reducing maintenance.
Its redesigned magnetic rotator has no moving parts to bind or jam. Other features reportedly include easy work thickness adjustment, with a single screw turn providing accurate, simple adjustments, and factory-set wire straighteners that virtually guarantee future straightener adjustments.
Likewise, Hohner Stitching offers a full range of OEM and replacement stitching heads. Among them is the HSS-HK head for Muller Martini and Best Osako machines. Its electronic wire feed guarantees wire length accuracy within 0.004˝ and boasts 40mm minimum center-to-center distance. Wire length can be adjusted on-the-fly via pushbutton control. Its 12mm crown promises a 15 percent reduction in wire cost over the standard 14mm crown width.