Abstract: A sheet processing apparatus includes a conveyor, a first folding roller, a second folding roller, a return conveyance passage, and a third folding roller. The conveyor conveys a sheet along a main conveyance passage in a conveyance direction. The second folding roller facing the first folding roller across the main conveyance passage conveys the sheet by a first conveyance amount. The return conveyance passage having a curvature is branched from the main conveyance passage at a branching position and is merged to the main conveyance passage at a merging position. The third folding roller facing the second folding roller across the return conveyance passage conveys the sheet by a second conveyance amount smaller than the first conveyance amount of the second folding roller. The second folding roller is on an outer peripheral side and the third folding roller is on an inner peripheral side of the return conveyance passage.

Abstract: A medium processing apparatus includes a conveyor, a liquid applier, and a crimper. The conveyor conveys a medium in a conveyance direction. The liquid applier applies liquid to a liquid application position on the medium conveyed by the conveyor. The crimper presses and deforms the liquid application position on a plurality of media including the medium to bind the plurality of media. The liquid applier includes a liquid application rotator configured to rotate, in contact with the medium conveyed by the conveyor, about a pivot extending in a main scanning direction orthogonal to the conveyance direction of the medium and to a thickness direction of the medium, to apply the liquid to the medium.

Abstract: A medium processing apparatus includes a conveyor, a liquid applier, and a crimper. The conveyor conveys a medium in a conveyance direction. The liquid applier applies liquid to a liquid application position on the medium conveyed by the conveyor. The crimper presses and deforms the liquid application position on a plurality of media including the medium to bind the plurality of media. The liquid applier includes a liquid application rotator configured to rotate, in contact with the medium conveyed by the conveyor, about a pivot extending in a main scanning direction orthogonal to the conveyance direction of the medium and to a thickness direction of the medium, to apply the liquid to the medium.

Abstract: A medium processing apparatus includes a conveyor, a receptacle, a liquid applier, and a crimper. The conveyor conveys a medium. The receptacle holds the medium conveyed by the conveyor. The liquid applier is disposed upstream from the receptacle in a conveyance direction of the medium to apply liquid to a liquid application position on the medium conveyed by the conveyor. The crimper presses and deforms the liquid application position on a plurality of media including the medium held on the receptacle to bind the plurality of media.

Abstract: A medium processing apparatus includes a conveyor, a receptacle, a liquid applier, and a crimper. The conveyor conveys a medium. The receptacle holds the medium conveyed by the conveyor. The liquid applier is disposed upstream from the receptacle in a conveyance direction of the medium to apply liquid to a liquid application position on the medium conveyed by the conveyor. The crimper presses and deforms the liquid application position on a plurality of media including the medium held on the receptacle to bind the plurality of media.