Sheet folding machine with waste product removal

A machine for folding sheets with waste product removal, the machine comprising:

• a sheet feeder for generating a stream of sheets;
• a first folding unit and a further unit disposed along a sheet transport direction, said first folding unit having at least one buckle plate and at least two folding rollers for folding the sheets, said buckle plate being on a given side of said at least two folding rollers;
• a monitoring device disposed at an entry region of said buckle plate on said given side, said monitoring device to monitor the stream of sheets in said buckle plate and to check the stream for defects;
• a removal device for removing waste products disposed between said first folding unit and said further unit along the sheet transport direction;
• and
• a control unit connected to said monitoring device and said removal device, said control unit to activate said removal device for removing a waste product when a defect is detected.