A liquid discharge head includes a wiring portion; a print element board including an element for applying discharge energy to liquid; and an electric wiring board including a connecting portion connected to the wiring portion and electrically connecting the wiring portion and the print element board. The connecting portion is provided with a cut portion at a position between both end portions in a width direction of the connecting portion, and a length of the cut portion in the width direction is shorter than a length of the cut portion in a direction orthogonal to the width direction.

A droplet generator for a continuous stream ink jet printhead includes an elongate cavity for containing ink and nozzle orifices in fluid communication with the cavity for passing the ink from the cavity to form jets. The nozzle orifices extend along a length of the cavity. A mounting plate provides a wall of the cavity opposite the nozzle orifices. A plurality of actuators is disposed in the cavity to vibrate the ink in the cavity such that each jet breaks up into ink droplets at substantially a same predetermined distance from the wall. Each of the plurality of actuators is integrally connected to the mounting plate by a membrane.

Provided is a method for manufacturing an element substrate for use in a liquid ejection head for ejecting a liquid to a recording medium. The element substrate, includes: a substrate having a nozzle including an ejection port, and a pressure generating chamber communicating with the nozzle, and subjected to a liquid repellent treatment on a part of a surface on a side opposed to the recording medium; and a generating element for generating an energy for ejecting the liquid. The method for manufacturing an element substrate includes: a liquid repellent treatment step of performing the liquid repellent treatment on the substrate; and a liquid repellent region removing step of removing a part of a liquid repellent region subjected to the liquid repellent treatment so that a non-liquid repellent region not subjected to the liquid repellent treatment is exposed at a surface of the substrate opposed to the recording medium.

Provided is a method for manufacturing an element substrate for use in a liquid ejection head for ejecting a liquid to a recording medium. The element substrate, includes: a substrate having a nozzle including an ejection port, and a pressure generating chamber communicating with the nozzle, and subjected to a liquid repellent treatment on a part of a surface on a side opposed to the recording medium; and a generating element for generating an energy for ejecting the liquid. The method for manufacturing an element substrate includes: a liquid repellent treatment step of performing the liquid repellent treatment on the substrate; and a liquid repellent region removing step of removing a part of a liquid repellent region subjected to the liquid repellent treatment so that a non-liquid repellent region not subjected to the liquid repellent treatment is exposed at a surface of the substrate opposed to the recording medium.

An electroprinting system having a voltage generator that produces a signal, a drop-on-demand (DOD) droplet generator actuated by the signal of the voltage generator, the drop generator having a wire for submersion into a viscous fluid, a power supply connected to the wire for supplying current to the DOD droplet generator, and a grounded collector for collection of the droplet generated by the DOD droplet generator. The drop-on-demand (DOD) droplet generator has a wire for plunging or threading through a meniscus of a viscous fluid, and an applied electrical potential to form a droplet from the viscous fluid. A method of electroprinting of a viscous fluid is also provided.

An electroprinting system having a voltage generator that produces a signal, a drop-on-demand (DOD) droplet generator actuated by the signal of the voltage generator, the drop generator having a wire for submersion into a viscous fluid, a power supply connected to the wire for supplying current to the DOD droplet generator, and a grounded collector for collection of the droplet generated by the DOD droplet generator. The drop-on-demand (DOD) droplet generator has a wire for plunging or threading through a meniscus of a viscous fluid, and an applied electrical potential to form a droplet from the viscous fluid. A method of electroprinting of a viscous fluid is also provided.

A liquid ejecting head includes: a wiring substrate; a plurality of pressure chambers that accommodate a liquid and communicate with nozzles; a drive element that is electrically coupled to the wiring substrate and changes a pressure in the pressure chamber; and a humidity detection section that is electrically coupled to the wiring substrate and is disposed for detection of humidity.

A liquid ejecting head includes: a wiring substrate; a plurality of pressure chambers that accommodate a liquid and communicate with nozzles; a drive element that is electrically coupled to the wiring substrate and changes a pressure in the pressure chamber; and a humidity detection section that is electrically coupled to the wiring substrate and is disposed for detection of humidity.

A printing unit includes: a fixed unit chassis having a lower cable tray mounted to a front part thereof; a movable printhead chassis having an upper cable tray mounted to a front face thereof, the printhead chassis supporting an upstream print module and a downstream print module relative to a media feed direction; a lift mechanism for lifting and lowering the printhead chassis relative to the unit chassis; upstream and downstream cable trunkings positioned at opposite upstream and downstream ends of the unit chassis for receiving electrical cabling from the lower cable tray; and upstream and downstream conduits connected to the upstream and downstream print modules respectively. The downstream cable trunking feeds cabling from the lower cable tray into the upstream conduit via the upper cable tray, and the upstream cable trunking feeds cabling from the lower cable tray into the downstream conduit via the upper cable tray.

A printing unit includes: a fixed unit chassis having a lower cable tray mounted to a front part thereof; a movable printhead chassis having an upper cable tray mounted to a front face thereof, the printhead chassis supporting an upstream print module and a downstream print module relative to a media feed direction; a lift mechanism for lifting and lowering the printhead chassis relative to the unit chassis; upstream and downstream cable trunkings positioned at opposite upstream and downstream ends of the unit chassis for receiving electrical cabling from the lower cable tray; and upstream and downstream conduits connected to the upstream and downstream print modules respectively. The downstream cable trunking feeds cabling from the lower cable tray into the upstream conduit via the upper cable tray, and the upstream cable trunking feeds cabling from the lower cable tray into the downstream conduit via the upper cable tray.