PURPOSE: To automatically carry out a series of processings from the transport of a package produced by a thread winding machine to the delivery after the steam treatment by connecting a package stocker, box packing device, and a steam treatment tank by a package transport conveyor or a package case transport conveyor.

CONSTITUTION: In the vicinity of a package production area 1, an arbitrary number of package stockers 2a-2n for temporarily storing the doffing-treated packages are installed, and an overhead conveyor 3 which transports packages one by one in the suspended state by a hanger is laid between the area 1 and the stocker 2. Then, a box packing station 5 is installed through a conveyor 4 in a package transport passage. The packages are covered one by one by a covering member, and a plurality of packages are accumulated and accommodated into a case made of corrugated cardboard, etc., and said case is packed by bands, and transported to the second stocker 9, and a certain quantity of package cases are placed onto the conveyor on a truck 10 and transported to a post-processing tank 11 of the discharge of the treated package in a steam processing tank 11.