Post-processing apparatus and image forming system

A post-processing apparatus comprising:

• an aligner to receive a sheet conveyed in a sheet conveyance direction in a stackable manner and align a position of the sheet in the sheet conveyance direction;
• a mover to move the sheet aligned by the aligning device in the sheet conveyance direction together with the aligning device;
• and
• a controller configured to selectively execute a first mode in which first post-processing is performed on the sheet and then second post-processing is performed on the sheet and a second mode in which the second post-processing is performed on the sheet without performing the first post-processing on the sheet,
• the controller being configured to, in response to a selection of the first mode, cause the mover to adjust a position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the first post-processing, and
• the controller being configured to, in response to a selection of the second mode, cause the mover to adjust the position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the second post-processing,
• wherein the first post-processing is saddle stitching for stitching central portions of a plurality of sheets,
• wherein the second post-processing is center folding for folding a central portion of the sheet, and
• wherein the controller is configured to control the mover such that a position of the aligner in the sheet conveyance direction when the center folding is performed in the second mode is placed upstream in the sheet conveyance direction from a position of the aligner in the sheet conveyance direction when the center folding is performed in the first mode.

A post-processing apparatus comprising:

• an aligner to receive a sheet conveyed in a sheet conveyance direction in a stackable manner and align a position of the sheet in the sheet conveyance direction;
• a mover to move the sheet aligned by the in the sheet conveyance direction together with the aligning device;
• and
• a controller configured to selectively execute a first mode in which first post-processing is performed on the sheet and then second post-processing is performed on the sheet and a second mode in which the second post-processing is performed on the sheet without performing the first post-processing on the sheet,
• the controller being configured to, in response to a selection of the first mode, cause the mover to adjust a position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the first post-processing, and
• the controller being configured to, in response to a selection of the second mode, cause the mover to adjust the position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the second post-processing,
• wherein the controller is configured to cause the mover to adjust the position of the aligner in the sheet conveyance direction in accordance with a number of sheets received by the aligner before the aligner receives the sheet.

A post-processing apparatus comprising:

• an aligner to receive a sheet conveyed in a sheet conveyance direction in a stackable manner and align a position of the sheet in the sheet conveyance direction;
• a mover to move the sheet aligned by the in the sheet conveyance direction together with the aligning device;
• and
• a controller configured to selectively execute a first mode in which first post-processing is performed on the sheet and then second post-processing is performed on the sheet and a second mode in which the second post-processing is performed on the sheet without performing the first post-processing on the sheet,
• the controller being configured to, in response to a selection of the first mode, cause the mover to adjust a position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the first post-processing, and
• the controller being configured to, in response to a selection of the second mode, cause the mover to adjust the position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the second post-processing,
• wherein the controller is configured to cause the mover to adjust the position of the aligner in the sheet conveyance direction in accordance with at least one of ambient temperature and ambient humidity before the aligner receives the sheet.

A post-processing apparatus comprising:

• an aligner to receive a sheet conveyed in a sheet conveyance direction in a stackable manner and align a position of the sheet in the sheet conveyance direction;
• a mover to move the sheet aligned by the in the sheet conveyance direction together with the aligning device;
• and
• a controller configured to selectively execute a first mode in which first post-processing is performed on the sheet and then second post-processing is performed on the sheet and a second mode in which the second post-processing is performed on the sheet without performing the first post-processing on the sheet,
• the controller being configured to, in response to a selection of the first mode, cause the mover to adjust a position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the first post-processing, and
• the controller being configured to, in response to a selection of the second mode, cause the mover to adjust the position of the aligner in the sheet conveyance direction before the aligner receives the sheet as a target of the second post-processing,
• wherein the aligner further includes a side fence to move in a width direction orthogonal to the sheet conveyance direction to align a position of the sheet in the sheet width direction, and
• wherein the controller is configured to cause the mover to move the side fence in the sheet conveyance direction.