Sheet folding apparatus, sheet processing apparatus and image forming apparatus

A sheet processing apparatus comprising a sheet folding apparatus, wherein said sheet folding apparatus comprises:

• sheet transport means for transporting sheets or a sheet bundle along a sheet transport path;
• a base configured to rotate;
• support means that is movable in a transport direction of the sheets or sheet bundle, and for supporting said sheets or sheet bundle in said sheet transport path, the support means mounted on the base;
• a folding plate configured to move forward or backward in a direction substantially perpendicular to said transport path;
• a pair of folding rollers disposed in a forward direction of said folding plate, and for folding the sheets or sheet bundle pressed into a nip with said folding plate;
• and
• angle adjustment means for adjusting an angle of an end face of said sheets or sheet bundle relative to a fold line by adjusting a rotated position of the base.

An image forming apparatus comprising a sheet folding apparatus, wherein said sheet folding apparatus comprises:

• sheet transport means for transporting sheets or a sheet bundle along a sheet transport path;
• a base configured to rotate;
• support means that is movable in a transport direction of the sheets or sheet bundle, and for supporting said sheets or sheet bundle in said sheet transport path, the support means mounted on the base;
• a folding plate configured to move forward or backward in a direction substantially perpendicular to said transport path;
• a pair of folding rollers disposed in a forward direction of said folding plate, and for folding the sheets or sheet bundle pressed into a nip with said folding plate;
• and
• angle adjustment means for adjusting an angle of an end face of said sheets or sheet bundle relative to a fold line by adjusting a rotated position of the base.

An image forming apparatus comprising a sheet processing apparatus integrally or separately, wherein said sheet processing apparatus has a sheet folding apparatus, said sheet folding apparatus comprising:

• sheet transport means for transporting sheets or a sheet bundle along a sheet transport path;
• a base configured to rotate;
• support means that is movable in a transport direction of the sheets or sheet bundle, and for supporting said sheets or sheet bundle in said sheet transport path, the support means mounted on the base;
• a folding plate configured to move forward or backward in a direction substantially perpendicular to said transport path;
• a pair of folding rollers disposed in a forward direction of said folding plate, and for folding the sheets or sheet bundle pressed into a nip with said folding plate;
• and
• angle adjustment means for adjusting an angle of an end face of said sheets or sheet bundle relative to a fold line by adjusting a rotated position of the base.

A sheet folding apparatus, comprising:

• a sheet transport unit configured to transport sheets or a sheet bundle along a sheet transport path;
• a base configured to rotate;
• a support unit configured to move in a transport direction of the sheets or sheet bundle, and to support said sheets or sheet bundle in said sheet transport path, the support unit mounted on the base;
• a folding plate configured to move forward or backward in a direction substantially perpendicular to said transport path;
• a pair of folding rollers disposed in a forward direction of said folding plate, and configured to fold the sheets or sheet bundle pressed into a nip with said folding plate;
• and
• an angle adjustment unit configured to adjust an angle of an end face of said sheets or sheet bundle relative to a fold line by adjusting a rotated position of the base.