Abstract: A bin for temporarily storing and subsequently dispensing particulate material has side and end walls with a discharge opening being defined between the lower edges of the walls. Material flow through the opening is controlled by a pair of gates normaly forming a bottom closure for the bin. The gates have spaced-apart inner side edges fitted with jaws in the form of longitudinally extending flanges. The flanges are spaced apart vertically and are staggered horizontally when the gates are closed and this arrangement serves to grip and hold a plug of material which seals the bottom opening to prevent loss of small amounts of the material.