A linear motion extensible device (21) includes: rod-shaped members (31); and a rotating plate (42) rotating in a wind-up direction to wind up the rod-shaped members (30) while rotating them around a coupling rotational shaft (32) and rotating in a wind-off direction to push out the rod-shaped members (31) so as to arrange them in a line, wherein the rod-shaped member (31) has: an intermediate shaft (33) and an angle regulating part (34) which regulates widening an angle between the adjacent rod-shaped members (31), the rotating plate (42) has engagement grooves (44) engaged with the coupling rotational shaft (32) and the intermediate shaft (33), and when the rotating plate (42) is rotated in the wind-off direction, the coupling rotational shaft (32) and the intermediate shaft (33) come into contact with an inner surface (45) of the engagement groove (44), are pushed out, and leave the engagement grooves (44).

A printing system comprises a sub-frame (5), a print module (8) with printheads (27), a first support unit (30) that is connected to the sub-frame (5), in particular movable in a displacement direction (z) relative to the sub-frame, a substrate holder (2) for supporting a substrate (3), and a positioning mechanism for moving the print module relative to the first support unit to and from a print position. A set of positioning parts (34-36) and positioning references (14-16) is provided that form part of or are connected to the print module (8) respectively the sub-frame (5). The positioning parts (34-36) are engageable with corresponding ones of the positioning references (14-16) for aligning the print module (8) relative to the sub-frame (5) when moved into its print position. The positioning mechanism comprises one or more four-bar linkage mechanisms (32) acting between the print module (8) and the first support unit (30).

A head cleaning mechanism includes a recording head and a wiper. The recording head has an ink ejection surface in which ink ejection ports are opened. The wiper wipes the ink ejection surface. The recording head has a cleaning liquid supply ports disposed on an upstream side of the ink ejection port in a wiping direction, and an inclined surface inclined downward toward a downstream side in the wiping direction, a tip of the wiper being in pressure contact with the inclined surface in the wiping operation. The inclined surface has a pressure contact start position at which the wiper starts the pressure contact in the wiping operation, and a water repellent region formed at least from the pressure contact start position to a position on an upstream side of the cleaning liquid supply port in the wiping direction.

A printing system comprises a sub-frame (5), a print module (8) with printheads (27), a first support unit (30) that is connected to the sub-frame (5), in particular movable in a displacement direction (z) relative to the sub-frame, a substrate holder (2) for supporting a substrate (3), and a positioning mechanism for moving the print module relative to the first support unit to and from a print position. A set of positioning parts (34-36) and positioning references (14-16) is provided that form part of or are connected to the print module (8) respectively the sub-frame (5). The positioning parts (34-36) are engageable with corresponding ones of the positioning references (14-16) for aligning the print module (8) relative to the sub-frame (5) when moved into its print position. The positioning mechanism comprises one or more four-bar linkage mechanisms (32) acting between the print module (8) and the first support unit (30).

A liquid ejecting head unit includes a liquid ejecting head having a nozzle forming portion in which a nozzle that ejects a liquid to a medium is formed, a shutter that has an opening portion exposing the nozzle and that is movable between a cover position in which a recessed portion including the nozzle is covered and an exposure position in which the nozzle is exposed, and a first communication portion that communicates with an inside of the recessed portion and that is capable of supplying a fluid into the recessed portion.

In one example, a shroud to protect a group of printheads in a printhead assembly includes a body having a first notched end where an upstream part of the body extends past a downstream part of the body and a second notched end opposite the first end where a downstream part of the body extends past an upstream part of the body. A first group of openings in the body is aligned across the upstream part of the body and a second group of openings in the body is aligned across the downstream part of the body. Each opening is to surround an exposed part of a printhead when the shroud is installed on the printhead assembly.

An ink-jet head protection device used in a building area having accumulated powder is provided. The ink-jet head protection device includes a movable base and an airflow guiding mechanism. The movable base includes an ink-jet head base. The ink-jet head base includes one or more ink-jet heads. The ink-jet head is arranged corresponding to the building area. The airflow guiding mechanism is assembled to the movable base. The airflow guiding mechanism generates a dust separating airflow and includes an airflow opening for guiding the dust separating airflow flowing between the ink-jet head and the building area. The dust separating airflow is used to isolate the powder spilled from the building area. Accordingly, the airflow guiding mechanism generates the dust separating airflow flowing between the ink-jet head and the building area.

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.

A head cleaning mechanism of the disclosure includes a recording head and a wiper. The recording head includes an ink ejection surface in which an ink ejection area with a plurality of ink ejection ports opened therein is provided. The wiper wipes the ink ejection surface in a specified direction. The recording head includes an inclined surface placed on an upstream side of the ink ejection surface in a wiping direction that is a direction in which the wiper wipes the ink ejection surface, the inclined surface being inclined downward toward a downstream side of the wiping direction. A plurality of cleaning liquid supply ports for supplying cleaning liquid are provided on a wiping-direction upstream side of a position in the inclined surface with which the wiper makes contact during wiping operation.

An inkjet recording apparatus includes an inkjet head, a supply path, a blade, and a cleaning liquid supply member. The inkjet head is provided with a nozzle surface on which ink ejection ports of a plurality of nozzles are opened downward. Through the supply path, a cleaning liquid is supplied. The blade is movable in contact with the nozzle surface. The cleaning liquid supply member supplies the cleaning liquid supplied through the supply path to at least one of the nozzle surface and the blade. The cleaning liquid supply member has at least one supply hole through which the cleaning liquid is supplied, and the supply path has a supply part inserted into the supply hole.