Saddle-stitchers are used in commercial print shops and book binding companies alike and are machines that are used for producing brochures and magazines.
The pre-folded sheets are fed by rotation feeders and positioned on top of each other on a gathering chain. This chain transports the sheets to the actual stitching machine where the spines of the booklets are wire stitched by the stitching heads. After completion of the stitching the booklet is trimmed at the three open sides by a three knife trimmer and depending on the configuration of the machine delivered on a stream delivery or delivered in stacks by a stacker.
Most popular manufacturers of saddle-stitchers are Müller Martini, Heidelberg and Hohner.