Book trimming

The step before book trimming is the binding of the folded printing sheets.

The knife-cut principle operates with only one knife per edge which cuts against a rubber surface.

The three knives cut all edges except the spine; new machines need only one step.

The shear cut principle works with two knives – upper and bottom knife.

To cut simple brochures (booklets) is used by a trimmer which works in two steps.