In some examples, an apparatus can include a valve body including a recirculation inlet path and a recirculation outlet path, a piston assembly located in the valve body, and a recirculation cavity between the valve body and the piston assembly, where print material is to be circulated through the recirculation cavity via the recirculation inlet path and the recirculation outlet path.

A printer configured to contain a media cartridge, wherein the media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

A printer configured to contain a media cartridge, wherein the media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

A media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

A media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

A printing device includes a providing unit configured to provide to a printed material an identifier for managing the printed material. The providing unit prints the identifier with invisible ink on the printed material. The identifier is visually recognizable under special light and invisible under normal light.

A printing device includes a providing unit configured to provide to a printed material an identifier for managing the printed material. The providing unit prints the identifier with invisible ink on the printed material. The identifier is visually recognizable under special light and invisible under normal light.

A media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

A media cartridge includes: a base defining a media chamber and including a lower wall and an opposing upper wall; an identification circuit disposed on the lower wall, the identification circuit configured to engage with an electronic interface of a printer; a ledge on the upper wall of the base, the ledge configured to receive downward pressure from an inner surface of a lid of the printer in a closed position; wherein the identification circuit is aligned with the ledge to receive at least a portion of the downward pressure.

In a sheet printer and a method for a sheet printer, the sheet printer includes a media support plane, a print controller, a print head and a user interface including a preview window including a representation of the media support plane. The print controller is configured to receive at least one digital image intended to be printed on a media piece, to receive position information of the position of the media piece on the media support plane, to display a representation of the media piece in a preview window, to determine a first part of the at least one digital image which fits on the media piece when printed and a second part of the at least one digital image which does not fit on the media piece and will not be printed, and to display a representation the first part as an at least partial overlay on the presentation of the media piece according to at least one first visual parameter. The print controller is further configured to display a representation of the second part in the preview window according to at least one second visual parameter, which deviates from the at least one first visual parameter.