Medium processing apparatus and image forming system

A medium processing apparatus for processing a medium ejected from an image forming apparatus, the medium processing apparatus comprising:

• a conveyor to convey the medium ejected from the image forming apparatus;
• a slit communicating with an opening of a housing into which a medium is manually inserted from outside, the slit including a placement face on which the inserted medium is placed, the placement face having a first side and a second side orthogonal to the first side, the first side and the second side being not parallel to a direction in which the conveyor conveys the medium;
• a medium processing device to process the medium conveyed by the conveyor or the medium placed on the slit;
• a stopper to regulate edges of the medium along the first side and the second side of the placement face;
• a plurality of detectors disposed on the stopper to detect the medium;
• a rotating unit to rotate the medium processing device in a horizontal direction;
• and
• circuitry configured to control an amount of rotation of the rotating unit.

A medium processing apparatus for processing a medium ejected from an image forming apparatus, the medium processing apparatus comprising:

• a conveyor to convey the medium ejected from the image forming apparatus;
• a slit communicating with an opening of a housing into which a medium is manually inserted from outside, the slit including a placement face on which the inserted medium is placed, the placement face having a first side and a second side orthogonal to the first side, the first side and the second side being not parallel to a direction in which a side face of the housing extends;
• a medium processing device to process the medium conveyed by the conveyor or the medium placed on the slit;
• a stopper to regulate edges of the medium along the first side and the second side of the placement face;
• and
• a plurality of detectors disposed on the stopper to detect the medium,
• wherein the placement face has the first side and the second side of different lengths, and
• wherein the plurality of detectors are disposed at:
• at least two locations on the stopper disposed along a longer one of the first side and the second side;
• and
• at least one location on the stopper disposed along a shorter one of the first side and the second side.

A medium processing apparatus for processing a medium ejected from an image forming apparatus, the medium processing apparatus comprising:

• a conveyor to convey the medium ejected from the image forming apparatus;
• a slit communicating with an opening of a housing into which a medium is manually inserted from outside, the slit including a placement face on which the inserted medium is placed, the placement face having a first side and a second side orthogonal to the first side, the first side and the second side being not parallel to a direction in which the conveyor conveys the medium;
• a medium processing device to process the medium conveyed by the conveyor or the medium placed on the slit;
• a stopper to regulate edges of the medium along the first side and the second side of the placement face;
• and
• a plurality of detectors disposed on the stopper to detect the medium,
• wherein the placement face has the first side and the second side of different lengths, and
• wherein the plurality of detectors are disposed at:
• at least two locations on the stopper disposed along a longer one of the first side and the second side;
• and
• at least one location on the stopper disposed along a shorter one of the first side and the second side.