Abstract: A plant preferably a freezer tunnel for temporary storage of items having an inlet and a discharge station. The plant includes a conveyor for carrying items therethrough. The conveyor loops around fixed turning rolls located opposite each other in the plant and around movable turning rolls located on at least one trolley. The trolley can be slid freely as a result of the speeds of the drives. A buffer storage is established when drive members for the conveyor is provided at both at the inlet and discharge station. The two drive members are constructed to be able to operate mutually independent at mutually variable speeds. The drive at the discharge station may be reversed in order to move the items on the conveyor at the discharge station back into the freezer tunnel.