Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a first wall. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage extends through the second wall in fluid communication with the liquid supply channel. The liquid supply passage includes a porous member. A liquid return passage extends through the second wall and is in fluid communication with the liquid return channel. The liquid return passage includes a porous member. A liquid supply provides liquid that flows from the liquid supply passage through the liquid supply channel, through the liquid dispensing channel, and through the liquid return channel to the liquid return passage.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel; and a liquid dispensing channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening. The outlet opening includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is sloped relative to the surface of the wall of the liquid dispensing channel. A liquid supply provides liquid that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member selectively diverts a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A liquid dispenser is provided that includes a liquid supply channel, a liquid dispensing channel, and a liquid return channel. The liquid dispensing channel includes a first wall. The first wall includes a surface. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage extends through the second wall and is in fluid communication with the liquid supply channel. A liquid return passage is positioned through the second wall and is in fluid communication with the liquid return channel. The liquid return passage overlaps the outlet opening of the liquid dispensing channel as viewed from a direction perpendicular to the surface of the first wall of the liquid dispensing channel.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a first wall. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage extends through the second wall and is in fluid communication with the liquid supply channel. A plurality of liquid return passages extends through the second wall and is in fluid communication with the liquid return channel. A liquid supply provides liquid that flows from the liquid supply passage through the liquid supply channel, through the liquid dispensing channel, and through the liquid return channel to the plurality of liquid return passages.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening. The outlet opening includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is perpendicular to the surface of the wall of the liquid dispensing channel. A liquid supply provides liquid that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member selectively diverts a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A liquid dispenser includes an array of liquid dispensing elements positioned on a substrate. Each liquid dispensing element includes a liquid dispensing channel positioned on the substrate. The liquid dispensing channel includes an outlet opening positioned on a wall opposite the substrate. A diverter member is associated with the liquid dispensing channel. A liquid return channel is positioned on the substrate in fluid communication with the liquid dispensing channel. A liquid supply channel is positioned on the substrate in fluid communication with the liquid dispensing channel. A liquid supply passage extends through the substrate and is in fluid communication with the liquid supply channel. A liquid return passage extends through the substrate and is in fluid communication with the liquid return channel. A liquid manifold includes a liquid supply duct and a liquid return duct. The liquid supply duct is in fluid communication with each liquid supply passage of each liquid dispensing element.

Abstract: A liquid dispenser is provided that includes a liquid supply channel, a liquid dispensing channel, and a liquid return channel. The liquid dispensing channel includes a first wall. The first wall includes a surface. A portion of the first wall defines an outlet opening. The liquid dispensing channel includes a second wall that is positioned opposite the first wall. The second wall of the liquid dispensing channel extends along a portion of the liquid supply channel and along a portion of the liquid return channel. A liquid supply passage is provided that extends through the second wall in and is fluid communication with the liquid supply channel. A liquid return passage is provided that extends through the second wall and is in fluid communication with the liquid return channel. The liquid return passage overlaps the outlet opening of the liquid dispensing channel as viewed from a direction perpendicular to the surface of the first wall of the liquid dispensing channel.

Abstract: A liquid dispenser is provided that includes a liquid supply channel, a liquid dispensing channel, and a liquid return channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening that includes a downstream edge relative to a direction of liquid flow through the liquid dispensing channel. The downstream edge is perpendicular to the surface of the wall of the liquid dispensing channel. A liquid is provided that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A liquid drop is caused to be ejected from the outlet opening of the liquid dispensing channel by selectively actuating a diverter member to divert a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A liquid dispenser includes a liquid supply channel, a liquid return channel, and a liquid dispensing channel. The liquid dispensing channel includes a wall. The wall includes a surface. A portion of the wall defines an outlet opening. The outlet opening includes an upstream edge relative to a direction of liquid flow through the liquid dispensing channel. The upstream edge includes a radius of curvature when viewed from a direction perpendicular to the surface of the wall. A liquid supply provides liquid that flows from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member that selectively diverts a portion of the flowing liquid through the outlet opening of the liquid dispensing channel.

Abstract: A method of ejecting droplets of liquid from a paired drop ejector, the method includes the steps of providing a chamber having a dividing wall that forms a first and second portion and the first portion includes a first nozzle mated with a first heater and the second portion includes a second nozzle mated with a second heater; providing liquid to the first portion and second portions of the chamber through an open end of the enclosure; providing a first electrical pulse to the first heater to provide thermal energy for ejecting a droplet of liquid from the first nozzle; and providing a second electrical pulse to the second heater to provide thermal energy for ejecting a droplet of liquid from the second nozzle; wherein the second electrical pulse is delayed relative to the first electrical pulse by a first predetermined delay time.

Abstract: A printer includes a printhead die including liquid ejectors separated by walls. Each liquid ejector includes a nozzle orifice and an associated drop forming mechanism. First and second liquid feed channels, extending in opposite directions, are in fluid communication with each liquid ejector. A liquid inlet includes a plurality of first and second segments in fluid communication with the first liquid feed channels and the second liquid feed channels, respectively. The first and second segments are located on opposite sides of the nozzle orifice. For a given liquid ejector, both of the first and second segments are directly in line with the liquid ejector. An electrical lead extends from each drop forming mechanism toward an edge of the printhead die. At least one of the electrical leads is positioned between neighboring segments of at least one of the first and second segments of the liquid inlet.

Abstract: A liquid dispenser includes a liquid supply channel including an exit having a cross sectional area, a liquid return channel, and a liquid dispensing channel including a cross sectional area and an outlet opening. The outlet opening includes an end that is adjacent to the liquid return channel. The cross sectional area of a portion of the liquid dispensing channel that is located at the end of the outlet opening is greater than the cross sectional area of the exit of the liquid supply channel. A liquid supply provides liquid under pressure from the liquid supply channel through the liquid dispensing channel to the liquid return channel. A diverter member is selectively actuatable to divert a portion of the liquid toward outlet opening of the liquid dispensing channel.

Abstract: A printhead module includes a substrate, a plurality of drop ejector arrays, and electronic circuitry. The substrate includes a butting edge extending in a first direction along the substrate. The plurality of drop ejector arrays extends substantially parallel to the butting edge of the substrate with a first drop ejector array of the plurality of drop ejector arrays being closest to the butting edge of the substrate. A portion of the electronic circuitry is disposed between the first drop ejector array and the butting edge of the substrate.

Abstract: A printer includes (a) an ink reservoir containing ink and having an outlet through which the ink passes for ejection onto a print medium; (b) a micro-fluidic actuator having (i) an inlet channel through which fluid enters; (ii) a chamber through which the fluid is received from the inlet channel; (iii) an outlet channel that receives the fluid from the chamber and passes the fluid through the outlet channel so that a conduit pathway for the fluid is formed from the inlet channel, chamber and outlet channel; (iv) a flexible membrane that forms a portion of a shared wall between the chamber and the ink reservoir and that displaces in response to fluidic pressure; (v) at least a first valve in the conduit pathway which, when the valve is activated, causes flow of the fluid through the conduit pathway to be altered so that pressure of the fluid passing through the chamber changes which, in turn, causes the flexible membrane to displace which, in turn, causes the ink to be ejected or not ejected from the ink rese

Abstract: An inkjet printing device includes an ink reservoir containing ink and having an outlet through which the ink passes for ejection onto a print medium; a micro-fluidic actuator having at least (i) an inlet channel through which fluid enters; (ii) a chamber through which the fluid is received from the inlet channel; (iii) an outlet channel that receives the fluid from the chamber and passes the fluid through the outlet channel so that a conduit pathway for the fluid is formed from the inlet channel, chamber and outlet channel; (iv) a flexible member that forms a portion of a wall of the chamber and that displaces in response to fluidic pressure; (v) at least a first valve in the conduit pathway which, when the valve is activated, causes flow of the fluid through the conduit pathway to be altered so that pressure of the fluid passing through the chamber changes which, in turn, causes the flexible member to displace which, in turn, causes the ink to be ejected or not ejected from the ink reservoir according to th

Abstract: A method of printing is includes providing liquid drops travelling along a first path using a jetting module. A moving liquid curtain is provided using a liquid source. Selected liquid drops are caused to deviate from the first path and begin travelling along a second path using a deflection mechanism such that the liquid drops travelling along one of the first path and the second path contact the liquid curtain in a drop interception region of the liquid curtain. The liquid curtain is collected downstream from the drop interception region using a liquid collection device.

Abstract: A printhead includes a jetting module that forms liquid drops travelling along a first path. A deflection mechanism causes selected liquid drops formed by the jetting module to deviate from the first path and begin travelling along a second path. A catcher includes a stationary porous surface. A liquid film flows over the stationary porous surface of the catcher. The catcher is positioned relative to the first path such that the liquid drops travelling along one of the first path and the second path contact the liquid film.

Abstract: A printhead includes a jetting module that forms liquid drops travelling along a first path. A deflection mechanism causes selected liquid drops formed by the jetting module to deviate from the first path and begin travelling along a second path. A moving liquid curtain is positioned relative to the first path such that the liquid drops travelling along one of the first path and the second path contact the liquid curtain in a drop interception region of the liquid curtain. A liquid collection device is positioned to collect the liquid curtain downstream from the drop interception region.

Abstract: A method of printing provides liquid drops travelling along a first path using a jetting module. A catcher including a stationary porous surface is also provided. A liquid film is caused to flow over the stationary porous surface of the catcher using a liquid source. Selected liquid drops are caused to deviate from the first path and begin travelling along a second path using a deflection mechanism. The liquid drops travelling along one of the first path and the second path contact the liquid film.

Abstract: A method of printing and an apparatus for controlling the directionality of liquid emitted from nozzles of a printhead are provided. Example embodiments of the apparatus include directionality control of liquid jets or liquid drops using a liquid jet directionality control mechanism. Example embodiments of the liquid jet directionality control mechanism include asymmetric energy application device configurations, nozzle geometry configurations, liquid delivery channel geometry configurations, or combinations of these configurations.