A liquid discharge head includes: a channel member having a nozzle surface and a back surface disposed separately from the nozzle surface, the channel member formed having nozzles arranged in the nozzle surface, individual channels connected to the nozzles, first and second common channels connected to the individual channels, a first opening that is opened in the back surface and communicates with an end of the first common channel, and a second opening that is opened in the back surface and communicates with an end of the second common channel, and a filter member disposed on the back surface and having a filter that covers the first opening. The second opening is not covered with the filter, and an area of the first opening is larger than an area of the second opening.

A liquid discharge device includes a nozzle plate including nozzles to discharge liquid; individual liquid chambers communicating with nozzles; a common liquid chamber to supply the liquid to the individual liquid chambers; a circulation channel; a common circulation chamber; a pressure generator to apply pressure to the liquid; and circuitry to apply, to the pressure generator, a predetermined drive waveform in which an electric potential is changed, from a first potential to apply an initial pressure to the liquid, to a second potential, and the second potential is kept to a predetermined timing for liquid discharging. At the predetermined timing, a discharge speed difference, caused when the initial pressure is changed in a case where the predetermined drive waveform is applied with the initial pressure applied to the liquid, is a local minimum. The initial pressure is applied to the liquid in a state without the predetermined drive waveform.

The liquid ejecting head includes a first individual flow path and a second individual flow path for supplying liquid to a pressure chamber, a first common flow path for supplying liquid to the first individual flow path, and a second common flow path for supplying liquid to the second individual flow path. A first circulation for causing liquid to flow in the order of the first individual flow path, the pressure chamber, and the second individual flow path and a second circulation for causing liquid to flow in the reverse order of the first circulation are switched. A flow path resistance of the first common flow path is designed to be less than a flow path resistance of the second common flow path and a flow path resistance of the first individual flow path is designed to be less than a flow path resistance of the second individual flow path.

An additive manufacturing system may include a fluid ejector. The fluid ejector may be movable across a build material distributor at a maximum speed of less than or equal to 40 inches per second. The fluid ejector may include a nozzle having a non-circular bore.

A liquid ejection head includes an individual channel, a first manifold, a filter, a second manifold, and a bypass path. The individual channel has a nozzle. The first manifold is in fluid communication with the individual channel. The filter is disposed in the first manifold. The second manifold is in fluid communication with the individual channel The bypass path is positioned between the individual channel and the filter in a direction in which liquid flows. The bypass path extends from the first manifold. The bypass path provides fluid communication between the first manifold and the second manifold not via the individual channel.

A liquid ejection head includes an individual channel, a first manifold, a filter, a second manifold, and a bypass path. The individual channel has a nozzle. The first manifold is in fluid communication with the individual channel. The filter is disposed in the first manifold. The second manifold is in fluid communication with the individual channel The bypass path is positioned across the filter from the individual channel with respect to a direction perpendicular to a surface extending direction of the filter. The bypass path provides fluid communication between the first manifold and the second manifold not via the individual channel.

A liquid discharge head includes a plurality of pressure chambers, a plurality of individual supply channels, a plurality of common supply channel branches, a common supply channel mainstream, a plurality of individual collection channels, a plurality of common collection channel branches, a common collection channel mainstream, a supply-side filter, and a bypass channel. The common supply channel mainstream is communicated with the common supply channel branches. The common collection channel mainstream is communicated with the common collection channel branches. The supply-side filter is in the common supply channel mainstream. The bypass channel bypasses the supply-side filter and communicates the common supply channel mainstream with the common collection channel mainstream. The bypass channel is connected to the common supply channel mainstream at a downstream of the supply-side filter in a direction of flow of the liquid along a longitudinal direction of the common supply channel mainstream.

Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of nozzles configured to eject a print fluid. Each nozzle is comprised of a first converging section having a cross-sectional area that decreases in a flow direction of the print fluid through the nozzle, a neck adjoining the first converging section and having a cross-sectional area that is uniform in the flow direction of the print fluid through the nozzle, and a second converging section adjoining the neck and having a cross-sectional area that decreases in the flow direction of the print fluid through the nozzle.

An image forming method includes coating a non-absorptive recording medium with a pre-processing fluid containing a metal salt and a resin A; and applying a magenta ink to the non-absorptive recording medium which has been coated with the pre-processing fluid, wherein the magenta ink contains a resin B having a glass transition temperature higher than the glass transition temperature of the resin A and C.I.Pigment Red 269 represented by the following Chemical formula 1: ##STR00001##

Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of nozzles configured to eject a print fluid. Each nozzle is comprised of a first converging section having a cross-sectional area that decreases in a flow direction of the print fluid through the nozzle, a neck adjoining the first converging section and having a cross-sectional area that is uniform in the flow direction of the print fluid through the nozzle, and a second converging section adjoining the neck and having a cross-sectional area that decreases in the flow direction of the print fluid through the nozzle.