Abstract: Feeder apparatus for feeding sheet material sections successively into a receiving hopper from a bundle of stacked sheet material sections. The apparatus includes a receiving section for receiving such bundles and for advancing such bundles. The apparatus further includes a shingling section having a shingling conveyor for receiving such bundles and conveying such bundles along the shingling section, and having a shingling belt system to engage such bundles being conveyed by the shingling conveyor wherein the conveyor and belt system cooperate to shingle the sheet material sections from such bundles into shingled arrangements. The shingling conveyor and shingling belt system are arranged to engage such a shingled arrangement between them and advance such an arrangement in an engaged condition along the shingling section.