To obtain a rising image which is extremely reduced in the supply and removal of waste paper (break-in paper sheet) to a paper supply table or on a paper discharge table, and the frequency of troublesome which is forced to a user until the start of printing such as the storage and management of the waste paper, and is surely stabilized.
A break-in printing paper supply/discharge unit 100 comprises: upper/lower stage paper supply/discharge trays 104a, 104b which are independent from a normal print paper storage part, and constitute a break-in printing paper storage part which stores waste paper 156 as a break-in printing paper so as to be feedable and receivable; and exclusive break-in printing paper supply/discharge passages (paper supply vertical transfer passage 112 and a paper discharge vertical transfer passage 113) or the like which are independent from a normal printing paper supply/discharge passage, supply and send the waste paper 156 from the break-in printing paper storage part to a printing drum 60, and discharge the waste paper 156 which is break-in printed by the printing drum 60 to the break-in printing paper storage part. The unit executes break-in printing while circulating the waste paper 156 in the break-in printing paper supply/discharge passages and the break-in printing paper storage part.
Toru Kabayama
Shogo Honda