To provide a sheet folding device that, when a sheet bundle is folded in three, prevents bundled sheets folded in three from being irregularly aligned in a width direction thereof depending on the number of sheets.
The sheet folding device is configured to fold a sheet bundle Sb at a position α thereof by pushing the bundled sheet Sb into a nip 2 of folding rollers 1A, 1B with a pushing plate 102 (a to c), push the bundled sheet Sb that has been folded at the position α into a nip 3 of folding rollers 1B, 1C with a pushing plate 103 (d to e) to fold the bundled sheet Sb at a position β thereof. The sheet folding device starts the pushing operation by the pushing plate 103 in earlier timing as the number of sheets constituting the bundled sheet Sb increases.
| JP3973943 | Middle folding device |
| JP2013189275 | SHEET PROCESSING DEVICE AND IMAGE PROCESSING APPARATUS |
| JP2002145517 | AFTER-TREATMENT DEVICE AND IMAGE FORMING SYSTEM |
Kobayashi Kunito
Koji Kawabata
Koichi Kimura
Next Patent: CONVEYING DEVICE, AND IMAGE FORMING APPARATUS