A postprocessing device is attached to an image forming apparatus. The postprocessing device includes a processing tray, a sheet processor, and a fan. The processing tray is for stacking thereon sheets on which an image has been formed and which is transported from the image forming apparatus. The sheet processor performs predetermined postprocessing on the sheets stacked on the processing tray. The fan forms an air layer between an upper face of the sheets already stacked on the stacking surface of the processing tray and a lower face of a sheet newly placed on the processing tray, by emitting air in a transport direction of the sheet, from an upstream side in the transport direction toward the stacking surface.

A postprocessing device is attached to an image forming apparatus. The postprocessing device includes a processing tray, a sheet processor, and a fan. The processing tray is for stacking thereon sheets on which an image has been formed and which is transported from the image forming apparatus. The sheet processor performs predetermined postprocessing on the sheets stacked on the processing tray. The fan forms an air layer between an upper face of the sheets already stacked on the stacking surface of the processing tray and a lower face of a sheet newly placed on the processing tray, by emitting air in a transport direction of the sheet, from an upstream side in the transport direction toward the stacking surface.

An upper supply tray is mounted at an upper mount position in a housing. A lower supply tray is mounted at a lower mount position lower than the upper mount position in the housing. A first print engine records an image on a sheet conveyed from the upper supply tray. A second print engine records an image on a sheet conveyed from the lower supply tray. A lower discharge tray supports the sheet on which the image is recorded by the first print engine. An upper discharge tray supports the sheet on which the image is recorded by the second print engine. The upper discharge tray is located at a higher position than the lower discharge tray. A first display displays at least: a first correspondence between the lower discharge tray and the upper supply tray; or a second correspondence between the upper discharge tray and the lower supply tray.

An upper supply tray is mounted at an upper mount position in a housing. A lower supply tray is mounted at a lower mount position lower than the upper mount position in the housing. A first print engine records an image on a sheet conveyed from the upper supply tray. A second print engine records an image on a sheet conveyed from the lower supply tray. A lower discharge tray supports the sheet on which the image is recorded by the first print engine. An upper discharge tray supports the sheet on which the image is recorded by the second print engine. The upper discharge tray is located at a higher position than the lower discharge tray. A first display displays at least: a first correspondence between the lower discharge tray and the upper supply tray; or a second correspondence between the upper discharge tray and the lower supply tray.

A first conveyance path and a second conveyance path are formed in a housing. The first conveyance path extends in a conveyance direction to reach a first discharge port for discharging a sheet. The second conveyance path extends in the conveyance direction at a position higher than the first conveyance path to reach a second discharge port for discharging a sheet. The second discharge port is located at a position upstream of the first discharge port in the conveyance direction. A first print engine is provided at the first conveyance path. The first print engine is configured to print an image by using a recording agent on a sheet conveyed along the first conveyance path. A second print engine is provided at the second conveyance path. The second print engine is configured to print an image by using a recording agent on a sheet conveyed along the second conveyance path.

A first conveyance path and a second conveyance path are formed in a housing. The first conveyance path extends in a conveyance direction to reach a first discharge port for discharging a sheet. The second conveyance path extends in the conveyance direction at a position higher than the first conveyance path to reach a second discharge port for discharging a sheet. The second discharge port is located at a position upstream of the first discharge port in the conveyance direction. A first print engine is provided at the first conveyance path. The first print engine is configured to print an image by using a recording agent on a sheet conveyed along the first conveyance path. A second print engine is provided at the second conveyance path. The second print engine is configured to print an image by using a recording agent on a sheet conveyed along the second conveyance path.

In a printing medium accommodating apparatus, a printing medium discharged from a discharge port of a printing apparatus is stacked. The printing medium accommodating apparatus includes: a receiving member configured to receive a printing medium discharged from the discharge port; and a holding member having a holding portion configured to hold one end of the receiving member, the holding member being capable of being connected with a first attachment unit attached to the printing apparatus, the holding member being configured to be capable of transitioning from a first state where the holding member is connected with the first attachment unit to a second state where the holding member is separated from the first attachment unit.

In a printing medium accommodating apparatus, a printing medium discharged from a discharge port of a printing apparatus is stacked. The printing medium accommodating apparatus includes: a receiving member configured to receive a printing medium discharged from the discharge port; and a holding member having a holding portion configured to hold one end of the receiving member, the holding member being capable of being connected with a first attachment unit attached to the printing apparatus, the holding member being configured to be capable of transitioning from a first state where the holding member is connected with the first attachment unit to a second state where the holding member is separated from the first attachment unit.

A post-processing device includes an intermediate tray on which a medium transported in a transport direction is placed, a discharge port through which the medium post-processed on the intermediate tray is discharged, a discharge tray which is disposed in a gravity direction with respect to the discharge port and on which the medium discharged from the discharge port is placed, and an elevating mechanism which elevates the discharge tray, in which the elevating mechanism can move the discharge tray to a first normal position and a first standby position positioned in a direction opposite to the gravity direction with respect to the first normal position, and moves the discharge tray to the first normal position or the first standby position according to an amount of ink before the medium comes in contact with the discharge tray or the medium previously placed on the discharge tray.

A post-processing device includes an intermediate tray on which a medium transported in a transport direction is placed, a discharge port through which the medium post-processed on the intermediate tray is discharged, a discharge tray which is disposed in a gravity direction with respect to the discharge port and on which the medium discharged from the discharge port is placed, and an elevating mechanism which elevates the discharge tray, in which the elevating mechanism can move the discharge tray to a first normal position and a first standby position positioned in a direction opposite to the gravity direction with respect to the first normal position, and moves the discharge tray to the first normal position or the first standby position according to an amount of ink before the medium comes in contact with the discharge tray or the medium previously placed on the discharge tray.