A printing apparatus that performs printing through an inkjet method includes an inkjet head and an ink supply system, where the ink supply system includes a pressure damper that is a pressure adjustment mechanism, a flow path that is a container-side flow path, and a connecting member in which a flow path that is a head-side flow path for flowing ink from the pressure damper to the inkjet head is formed, the pressure damper supplies ink adjusted to a pressure in a predetermined range lower than atmospheric pressure from an output port that is a pressure adjustment mechanism outlet to the flow path, and a flow path cross-sectional area of at least one part of the flow path in the connecting member is larger than a flow path cross-sectional area of the output port.

A micro-pneumatic control unit comprising a plurality of control channels for generating the control pressures in a pneumatically actuated multi-channel coating head for coating components with a coating agent, a control channel being characterized by a valve element comprising a valve bore in a valve plate and a diaphragm layer which is below the valve plate and is configured as a diaphragm closing element in the region of the valve bore, the shape of which diaphragm closing element defined by recesses positioned laterally with respect to the valve bore, by a micro-actuator having a plunger that actuates the diaphragm closing element through the valve bore such that the valve element opens, by a second micro-pneumatic element connected in series with the valve element, the control pressure developing and a cavity located at the connection node thereof, which cavity is connected to at least one pneumatically operated coating agent ejector, and by a pneumatic pressurization of the micro-pneumatic control unit, which is directed such that, with respect to the valve element, there is a pressure gradient from the diaphragm closing element to the valve bore in the valve plate.

A damper for a continuous ink jet printer, comprising a fluid receiving chamber (6), comprising at least a lateral wall (22), a fluid inlet (11), and a fluid outlet (12), and at least one membrane (14), the membrane being in a material having a Young modulus between 0.5 MPa and 1000 MPa, the membrane being deformed under the influence of a pressure variation in the first portion.

A liquid ejecting head includes a channel forming body including a plurality of individual channels, a first manifold and a second manifold. The plurality of individual channels includes: a nozzle; a pressure chamber which is arranged to be apart from the nozzle in a first direction; a descender communicating the pressure chamber and the nozzle with each other, and extending in the first direction; a return channel including a first return channel and a second return channel, extending in a direction crossing the first direction, and having one end connected to the descender; and a communicating channel including a first communicating channel, and connecting the other end of the return channel to the second manifold. The first communicating channel connects the first return channel to the second manifold and connects the second return channel to the second manifold.

In one example, a vent includes multiple parts each having a different resistivity to passing a gas. The parts are arranged so that the gas may pass through all parts simultaneously as long as the parts remain permeable to the gas.

A liquid discharging apparatus has: a discharging section that discharges a liquid when at least one of a first piezoelectric element and a second piezoelectric element is driven; In a first mode in which the driving signal is output from the second output portion, the switch control circuit controls the first switch so as not to create a continuity and controls the second switch so as to create a continuity. In a second mode in which the constant-voltage signal is output from the second output portion, the switch control circuit controls the first switch so as to create a continuity and controls the second switch so as not to create a continuity.

A liquid jetting apparatus includes: individual channels; and a manifold commonly provided for the individual channels. Each of the individual channels has: a nozzle; a pressure chamber arranged away from the nozzle in a predetermined direction to extend along a plane orthogonal to the predetermined direction and connected to the manifold, a connecting channel connected to the pressure chamber to form at least a part of a channel communicating the pressure chamber and the nozzle, and a circulation channel connected to the connecting channel to form a part of a channel communicating the connecting channel and the pressure chamber. The connecting channel has a throttle, and the throttle has a smaller diameter along the plane orthogonal to the predetermined direction than a diameter, of a part of the connecting channel except the throttle, along the plane orthogonal to the predetermined direction.

A liquid jetting apparatus includes: individual channels; and a manifold commonly provided for the individual channels. Each of the individual channels has: a nozzle; a pressure chamber arranged away from the nozzle in a predetermined direction to extend along a plane orthogonal to the predetermined direction and connected to the manifold, a connecting channel connected to the pressure chamber to form at least a part of a channel communicating the pressure chamber and the nozzle, and a circulation channel connected to the connecting channel to form a part of a channel communicating the connecting channel and the pressure chamber. The connecting channel has a throttle, and the throttle has a smaller diameter along the plane orthogonal to the predetermined direction than a diameter, of a part of the connecting channel except the throttle, along the plane orthogonal to the predetermined direction.

A liquid jetting apparatus includes: individual channels; and a manifold commonly provided for the individual channels. Each of the individual channels has: a nozzle; a pressure chamber arranged away from the nozzle in a predetermined direction to extend along a plane orthogonal to the predetermined direction and connected to the manifold, a connecting channel connected to the pressure chamber to form at least a part of a channel communicating the pressure chamber and the nozzle, and a circulation channel connected to the connecting channel to form a part of a channel communicating the connecting channel and the pressure chamber. The connecting channel has a throttle, and the throttle has a smaller diameter along the plane orthogonal to the predetermined direction than a diameter, of a part of the connecting channel except the throttle, along the plane orthogonal to the predetermined direction.

A micro-pneumatic control unit comprising a plurality of control channels for generating the control pressures in a pneumatically actuated multi-channel coating head for coating components with a coating agent, a control channel being characterized by a valve element comprising a valve bore in a valve plate and a diaphragm layer which is below the valve plate and is configured as a diaphragm closing element in the region of the valve bore, the shape of which diaphragm closing element defined by recesses positioned laterally with respect to the valve bore, by a micro-actuator having a plunger that actuates the diaphragm closing element through the valve bore such that the valve element opens, by a second micro-pneumatic element connected in series with the valve element, the control pressure developing and a cavity located at the connection node thereof, which cavity is connected to at least one pneumatically operated coating agent ejector, and by a pneumatic pressurization of the micro-pneumatic control unit, which is directed such that, with respect to the valve element, there is a pressure gradient from the diaphragm closing element to the valve bore in the valve plate.