thereafter a suitable number of containers are stacked and are conveyed by a supply conveyer on an upstream side until the aligning device 12 and are stacked and aligned by the aligning device 12 at this time end faces of the containers c in a longitudinal direction are located in a forward backward direction and both side faces of the containers c in a transversal direction are located leftward and rightward in this state the containers c stacked and aligned within the aligning device 12 are pushed out by the third dog 16 a of the pusher portion 14 of the container supply discharge device b until the standby position d of the conveying path 15 at this time the second dog 16 b and the first dog 16 c are simultaneously operated and the second dog 16 b sends the containers c located in the standby position d into the container centrifugal drier a the first dog 16 c pushes out the containers c located within the container centrifugal drier a onto the discharge conveyer 17 and respectively simultaneously moves the containers c these dogs are sequentially similarly operated the bridge 18 arranged in a lowermost stream of the.