The Mueller 221 Book Binder is a used book binding machine — sometimes referred to as a perfect binder or saddle stitcher line depending on configuration — designed for the automated collating, stitching, and trimming of booklets, brochures, and similar printed products. Mueller is a well-established name in the printing and binding industry, known for producing high-output equipment for commercial printers, publishers, and binderies.
This machine is configured as a complete binding line built around several integrated stations. It is equipped with seven feeders, model 888, which feed and collate the individual signatures or covers into the binding sequence. Two hand allowance stations are included, providing positions for manually inserted inserts or sections that cannot be fed automatically. A single stapling station, designated 221, handles the saddle-stitching process, driving wire staples through the spine of the collated booklet.
Following stitching, the line incorporates a three-knife trimmer with centre cut, model 217, which trims the head, foot, and face of the finished booklet in a single pass while also performing a centre cut — making this configuration suitable for producing two booklets from a single sheet run, a common efficiency measure in high-volume production. A shed display is also included, providing the operator with real-time process monitoring.
As an optional addition, this line is offered with a compensating stacker, a Rima model RS-11 9¼, which collects and stacks the finished trimmed products in neat, offset piles for easy downstream handling. The machine dates from 1993, is in used condition, and is currently located in Germany.
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