Abstract: An apparatus and method for perforating a plastic film fleader section connecting together a plurality of plastic film bags and forming a pack of saddle bags. The saddle bags are carried on a block with the header on the block and the bags draped thereover. The block is in sliding engagement with a track and is selectively moved in position in the apparatus. A pair of pivotally connected arms are selectively pivotally moved in contact with the plastic film bags pulling the bags generally away from the header and causing the header to become taut. A pair of perforation blades are forced toward the carrying block and through the header simultaneously creating two perforation lines, one line on each side of the header.