| 摘要 |
PROBLEM TO BE SOLVED: To reduce jamming of a sheet and to prevent conformity failure at the time of discharging the sheet by constituting an upstream rotor and a downstream rotor free to make content with and separate from a sheet transfer rotor interlocked with transfer passage change-over motion of a transfer passage change-over means. SOLUTION: A flapper 12 revolves, blocks a discharge passage and opens a carrier passage at the time of carrier motion of a first surface part of a sheet. At this time, a cam 32 revolves and separates an upstream roller 10 and a downstream roller 11 from a discharge roller 9. Consequently, the sheet simply passes a curl removal rotor A and stiffening is not carried out. Accordingly, it is possible to deliver the sheet to an intermediate tray without increasing a protruded curl on the sheet on the first surface of which picture image formation is carried out. The upstream roller 10 and the downstream roller 11 abut to the discharge roller 9 and are brought into pressure contact with each other by revolution of the cam 32 at the time of leading the sheet to the discharge passage. Thereafter, stiffening of the sheet passing through the curl removal rotor A is carried out and a curl is removed, the sheet is discharged to the discharge passage. |
