The invention relates to a printhead (1) for a 3D printer, particularly a metal printer, comprising a housing (3), a device (28) for supplying a metal (14), a reservoir (7, 27), a nozzle device (2) and a piston (5), the nozzle device (2) comprising a guide sleeve (11), a nozzle plate (9) provided with an outlet (10), and a clamping device (4). The nozzle plate (9) and the guide sleeve (11) are mutually elastically braced by means of the clamping device (4), and the guide sleeve (11) and the reservoir (7, 27) are mutually elastically braced by means of the clamping device (4).

An execution system (100) for a fluid micro-injection device have a base body (110), a movable member (120), an executor, an adjusting member (130) and a plurality of clearance sheets. The movable member (120) is movably disposed on the base body (110). The executor and the adjusting member (130) are disposed in the base body (110). The plurality of clearance sheets are disposed between the base body (110) and the adjusting member (130) to adjust a pre-tightening force of the executor.

A liquid jet discharge device including an ejection section, a pressure generation section, and an impulse force impartation means. The ejection section is open at both end portions and internally houses a liquid such that a contact angle between the liquid and at least an inner face of the ejection section is less than 90°. The pressure generation section is in communication with one end portion of the ejection section, has a cross-sectional area larger than a cross-sectional area of the ejection section, has a length in a discharge direction of a liquid jet that is longer than a length in the discharge direction from the one end portion of the ejection section to a surface of the liquid, and houses the liquid at least at a bottom face side onto which the one end portion opens. The impulse force impartation means is configured to impart an impulse force to the pressure generation section.

A programmable networked variable atomizer (PNVA) assembly is provided. In one embodiment, the PNVA assembly includes an atomizing portion. The atomizing portion includes multiple miniature fluid control valves and an air assisted atomizing outlet. The PNVA assembly also includes a PNVA electronic module. The PNVA electronic module includes a microcontroller, at least one pulse width modulation driver, a wireless radio, a differential pressure sensor, and a laser targeting LED.

An aerial fluid dispersal system includes a fluid reservoir configured to hold a quantity of fluid, a manifold assembly in fluid communication with the fluid reservoir, a fluid pump coupled in fluid communication with the fluid reservoir and the manifold assembly, a plurality of nozzle assemblies coupled in fluid communication with the manifold assembly, and a controller coupled to the fluid pump and the plurality of nozzle assemblies. Each nozzle assembly includes an electrically-actuated valve, a spray nozzle fluidly coupled downstream of the electrically-actuated valve, and a check valve fluidly coupled in series with the electrically-actuated valve. The controller is configured to control the operating parameter of the electrically-actuated valve of each nozzle assembly.

In order to develop devices and methods for impulse ejection of medium, a device for impulse ejection of medium is proposed, comprising a medium chamber for holding a medium, said chamber being defined by an ejection tube and a sleeve, adjoining the ejection tube at the opposite end from the ejection end thereof, and a propellant chamber) for holding a propellant, said propellant chamber surrounding at least partially the medium chamber in the region of the sleeve, wherein the sleeve is designed for movement between a pressure position and an ejection position and seals, in the pressure position, the medium chamber from the propellant chamber at an end plate and wherein the sleeve in the ejection position is spaced apart from the end plate such that there is fluid communication for passage of the propellant from the propellant chamber into the medium chamber.

A print head includes a capillary around an axis of symmetry for a liquid to be printed, the capillary adjoining at least one elastic element and having a nozzle opening which opens into a prechamber. The prechamber has an outlet opening aligned with the nozzle opening of the capillary in its axial orientation of the axis of symmetry and at least one inlet opening for a guide gas. The at least one elastic element forms a guide for the capillary in its axial orientation only. A feed for the liquid to be printed is provided in the capillary. A mechanical oscillation system is provided that includes the at least one elastic element and the capillary with the liquid contained therein. An actuator with a mechanical or magnetic force interaction with the oscillation system is further provided.

A method for jetting a viscous medium onto a substrate is disclosed. The method includes providing viscous medium to a jetting chamber of an ejector, operating an impacting device to impact a volume of the viscous medium in the chamber such that viscous medium is jetted through a nozzle, connected to the chamber, towards the substrate, and monitoring a displacement of the impacting device during impact. An ejector and a system comprising such an ejector and a control unit is also disclosed. The monitoring of the displacement allows for the operation of the impacting device to be controlled accordingly, thereby providing for an improved control of the jetting process.

A liquid-coating apparatus includes: (a) a nozzle hole from which a liquid material is to be discharged; (b) a supply flow channel configured to supply the liquid material to the nozzle hole; (c) a plunger configured to reciprocate in contact with the liquid material inside the supply flow channel; (d) a displacement-expansion mechanism configured to displace the plunger; and (e) an actuator configured to displace the displacement-expansion mechanism, wherein at least one of a contact part of the displacement-expansion mechanism and a contact part of the actuator has a curved surface.

A liquid droplet ejection device includes at least one first liquid droplet ejection unit including a first liquid holding unit and a first tip, the first tip to eject the first liquid in the first liquid holding unit as a first liquid droplet onto an object; at least one second liquid droplet ejection unit including a second liquid holding unit and a second tip, the second tip to eject the second liquid in the second liquid holding unit as a second liquid droplet onto the object; an object holding unit to hold the object; and a driving unit to move the first tip and the second tip in a first direction. An inner diameter of the second tip is larger than an inner diameter of the first tip. The first tip and the second tip are arranged along the first direction. The second tip is arranged behind the first tip.