To improve skew correction performance for a folded sheet without lowering the productivity of the folded sheet.
A skew correction device includes a sheet conveying roller 1' arranged in a sheet conveying path; an entry roller 1 arranged downstream of the conveying roller 1' in a sheet conveying direction and driven separately from the sheet conveying roller 1'. When a sheet P is unfolded paper, the skew correction device performs first skew correction for correcting a skew by making a tip Pb of the sheet conveyed by the sheet conveying roller 1' abut on the entry roller 1 that is stopped. When a sheet Pz is Z folded paper, the skew correction device performs second skew correction for correcting the skew by making a tip of the sheet conveyed by the sheet conveying roller 1' abut on the entry roller 1, and reversing the rotation of the entry roller 1 at preset timing.
TAMURA MASAHIRO
NAGASAKO HIDEYA
FURUHASHI TOMOHIRO
SUGIYAMA KEISUKE
SHIBAZAKI YUSUKE
SUZUKI JUNYA
NIIKURA YASUO
KONNO KAZUNORI
HOSHINO TOMOMICHI
KUNIEDA AKIRA
WATANABE KENHIRO
YOSHIZAKI TOMOHIRO
GOTO KIICHIRO
YAMAMOTO KAZUYA
| JP2008247608A | 2008-10-16 | |||
| JP2007001700A | 2007-01-11 | |||
| JP2005335940A | 2005-12-08 |
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