Abstract: A spittoon system for a printing mechanism includes a reservoir elongated in a longitudinal direction and having a bottom part. The reservoir receives printing fluid residue spit from a print-head onto a first zone of the reservoir. The spittoon system further includes a cleaning element arranged inside the reservoir to transfer, by sliding along the longitudinal direction of the reservoir, the received printing fluid residue from the first zone to a second zone. The second zone includes a drain outlet to drain the printing fluid residue from the reservoir.

Abstract: A modular print engine unit for independently operable use in a media-wide array printer comprises multiple printhead modules, each printhead module comprising multiple printing dies and each printing die comprising multiple nozzles. The modular print engine unit further comprises a printing fluid supply system to feed, in use, printing fluid to the multiple printhead modules; a print alignment module operable, in use, to align the multiple printhead modules; an error detection module operable, in use, to detect an operating status of the multiple nozzles; and a service sub-system operable, in use, to service the multiple nozzles.

Abstract: In one example in accordance with the present disclosure a media transport device is described. The device includes a number of drive rollers coupled to a frame. A number of media rollers are also coupled to the frame. The media rollers are in contact with, and rotated by, the number of drive rollers. Media rollers in a first set have a first diameter and media rollers in a second set have a second diameter that is different from the first diameter. The device also includes a number of pinch rollers coupled to the frame. The pinch rollers are in contact with the number of media rollers to form a number of nips through which media passes along a feed path.

Abstract: A modular print engine unit for independently operable use in a media-wide array printer includes multiple printhead modules, each printhead module including multiple printing dies, and each printing die including multiple nozzles. The modular print engine unit further includes a printing fluid supply system to feed, in use, printing fluid to the multiple printhead modules; a print alignment module operable, in use, to align the multiple printhead modules; an error detection module operable, in use, to detect an operating status of the multiple nozzles; and a service sub-system operable, in use, to service the multiple nozzles.

Abstract: In one example in accordance with the present disclosure a media transport device is described. The device includes a number of drive rollers coupled to a frame. A number of media rollers are also coupled to the frame. The media rollers are in contact with, and rotated by, the number of drive rollers. Media rollers in a first set have a first diameter and media rollers in a second set have a second diameter that is different from the first diameter. The device also includes a number of pinch rollers coupled to the frame. The pinch rollers are in contact with the number of media rollers to form a number of nips through which media passes along a feed path.

Abstract: In an example, a valve for a printing fluid supply system is disclosed. In this example, the valve includes two rigid shells to provide connections to a first printing fluid supply cartridge, a second printing fluid supply cartridge and a printhead. Further, the valve includes a diaphragm with sealing elements disposed between the two rigid shells to selectively couple one of the first printing fluid supply cartridge and the second printing fluid supply cartridge to the printhead and seal other printing fluid supply cartridge using the sealing elements.

Abstract: In one example, a datuming system to position a printhead assembly relative to a component external to the printhead assembly includes a first datum on the printhead assembly to establish a first plane, a first line, and a first point and a second datum on the printhead assembly to establish a second plane orthogonal to the first plane, a second line, and a second point.

Abstract: A spittoon beam system and a printer that includes a spittoon beam system. The system has a spittoon beam spanning and movably mounted to spaced spaced parallel tracks. The spittoon beam is driven along the tracks by a first motor and a second motor coupled to respective ends of the spittoon beam. A first motor driver is coupled to the first motor and a second motor driver coupled the second motor. The system is configured so that the first motor driver controls an output shaft speed of the first motor independently of the second motor driver, and the second motor driver controls an output shaft speed of the second motor independently of the first motor driver.

Abstract: An assembly of a large format media handling system, including a planar longitudinal cross structure; and a support structure, the support structure including two side supports comprising a number of fixed references and at least one adjustable reference, wherein the side supports are supported by the longitudinal cross structure at said references; wherein the at least one adjustable reference is formed by a wedge element slidably attached to the support structure; and the side supports are fixed to the planar longitudinal cross structure wherein the cross structure is in contact with all of the references.

Abstract: An assembly of a large format media handling system comprises a planar cross structure, and a support structure, the support structure including two side supports, wherein the two side supports extend perpendicularly to the cross structure and are connected to the cross structure at respective side edges of the side supports. A tensioning component is associated with each of the side supports, wherein the tensioning component transmits a tensioning force between the cross structure and the side edges of the side supports in a direction parallel to the side supports.

Abstract: In one example, a holder for a media roll includes a first support to support a first end of the roll, a second support to support a second end of the roll, and a shifter to change the distance between the first support and the first end of the roll without changing the distance between the second support and the second end of the roll.

Abstract: A modular print engine unit for independently operable use in a media-wide array printer comprises multiple printhead modules, each printhead module comprising multiple printing dies, and each printing die comprising multiple nozzles. The modular print engine unit further comprises a printing fluid supply system to feed, in use, printing fluid to the multiple printhead modules; a print alignment module operable, in use, to align the multiple printhead modules; an error detection module operable, in use, to detect an operating status of the multiple nozzles; and a service sub-system operable, in use, to service the multiple nozzles.

Abstract: In one example, a datuming system to position a printhead assembly relative to a component external to the printhead assembly includes a first datum on the printhead assembly to establish a first plane, a first line, and a first point and a second datum on the printhead assembly to establish a second plane orthogonal to the first plane, a second line, and a second point.

Abstract: In one example, a datuming system to position a printhead assembly relative to a component external to the printhead assembly includes first primary datum points and second primary datum points. The first primary datum points establish a first datum plane to position the printhead assembly relative to a first component external to the printhead assembly. The second primary datum points establish a second datum plane to position the printhead assembly relative to a second component external to the printhead assembly.

Abstract: In one example, a datuming system to position a printhead assembly relative to a component external to the printhead assembly includes first primary datum points and second primary datum points. The first primary datum points establish a first datum plane to position the printhead assembly relative to a first component external to the printhead assembly. The second primary datum points establish a second datum plane to position the printhead assembly relative to a second component external to the printhead assembly.

Abstract: A positioning assembly is disclosed herein. An example includes a guide shaft having a longitudinal axis and a housing movable along and rotatable about the longitudinal axis of the guide shaft. The housing is also transversely movable and transversely rotatable with respect to the longitudinal axis of the guide shaft. The example of the positioning assembly additionally has a brake mechanism including at least one shoe and a caliper eccentrically mounted on the guide shaft and moveable from a first position that permits movement and rotation of the housing to a second position that impedes movement and rotation of the housing. Other elements and features of the positioning assembly are disclosed herein, as are other examples of positioning assemblies.

Abstract: A printing device comprises a medium handling section to handle a print medium; an image section to form an image on the print medium while the medium is handled by the medium handling section; a variable stop to support the medium handling section or the image section when the printing device is in a first configuration, the variable stop having at least two states, each state defining a respective separation between the medium handling section and the image section when in the first configuration, a movement section to cause relative movement between the medium handling section and the image section, the relative movement moving the printing device between the first configuration and a second configuration, where neither the medium handling section nor the image section is supported by the variable stop in the second configuration; the variable stop to change state when the printing device is in the second configuration.

Abstract: A printing device comprises a medium handling section to handle a print medium; an image section to form an image on the print medium while the medium is handled by the medium handling section; a variable stop to support the medium handling section or the image section when the printing device is in a first configuration, the variable stop having at least two states, each state defining a respective separation between the medium handling section and the image section when in the first configuration, a movement section to cause relative movement between the medium handling section and the image section, the relative movement moving the printing device between the first configuration and a second configuration, where neither the medium handling section nor the image section is supported by the variable stop in the second configuration; the variable stop to change state when the printing device is in the second configuration.