| 摘要 |
PROBLEM TO BE SOLVED: To provide a one-process, both sides printing device capable of performing single side printing without using a wasteful master unit, producing a printed matter of good picture quality when both sides printing is to be made, and suppressing occurrence of a jam in transporting sheets of paper. SOLUTION: The both sides printing device comprises a printing part 22, a sheet feed part 4, a sheet discharge part 6, a refeeding means 9 having an auxiliary tray 8, and a changeover member 10, wherein the refeeding means 9 has a refeeding transport unit 25 to transport each surface-printed sheet PA on the auxiliary tray 8 toward a press roller 13 and a sheet receptacle plate 40 installed over the oversurface of the transport unit 25 with a certain gap reserved in between and receiving one end of the surface-printed sheet PA guided to the auxiliary tray 8 by the changeover member 10, and the sheet receptacle plate 40 is arranged capable of reciprocating in the same direction as the transportation of the surface-printed sheet PA by the refeeding transport unit 25. COPYRIGHT: (C)2004,JPO
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