Sheet folding apparatus, sheet folding method, and printing system including the sheet folding apparatus

A sheet folding apparatus, comprising:

• a sheet transport system;
• adjustable folding members arranged to bend and fold a sheet fed by the transport system;
• a control system arranged to adjust the folding members to set positions in accordance with information on sheet properties;
• and
• an actuator to position the folding members with respect to one another to determine a location of a fold in the sheet,
• wherein the control system stores a table that specifies different set positions of the folding members for different bending properties of the sheets, and is to read information on a bending property of the sheets to be folded and to adjust the folding members to one of the different set positions as specified by the bending property, and
• wherein the control system is to:
• determine a bending property of the sheet based on the information on the sheet properties;
• select one of the set positions from the stored table based on the bending property of the sheet;
• and
• control the actuator to position the folding members to the selected one of the set positions, so the folding members form the fold at a desired position.