Device and method for simultaneous square folding of the spine and trimming of booklets

A post-processing device comprising:

• an inlet for receiving a booklet to be post-processed,
• an outlet for outputting the booklet after post-processing,
• a cutting assembly comprising a knife and a support,
• a square folding assembly comprising a press means for applying pressure along the spine of the booklet,
• a conveying system configured to move the booklet along a transportation path from the inlet to the outlet via the cutting assembly and the square folding assembly, and
• a clamping assembly configured to be operable between a clamping position in which the clamping assembly clamps the spine portion of the booklet to hold the booklet static in a processing position for processing by the square folding assembly and the cutting assembly, and an open position in which the clamping assembly allows the booklet to move,
• characterized in that the cutting assembly and/or the square folding assembly is/are movably attached to the post-processing device such that the distance between the square folding assembly and the cutting assembly is variable by movement of at least one of the cutting assembly and the square folding assembly.