Abstract: The invention relates to a device for processing dust- and substantially air-tight sacks (1) filled with flowable or free-flowing materials, and for separating the sack material from the sack contents via a collection device (8), wherein the device comprises a sack supply track (4) with a sack removal point (56), a manipulation device (6) with a lifting frame (9) for picking up the filled sacks (1), a sack slitting device (16) for opening the filled sacks (1), a collection device (8) for collecting the sack contents, an empty sack store (12), and an empty pallet store (13).