The Tremat sheet separator fans the pile in the flat pile or pallet feeder to preseparate the sheets. It runs efficiently and independently of the machine cycling rate to ensure high productivity of the folding machine - while significantly reducing the time spent on makeready. The Tremat is easy and straightforward to set and operate. The blowers may be rotated around their vertical axis to optimize separation, especially with large-format sheets. The Tremat is attached to the side of the paper pile and can be easily tilted up for simpler access and loading.