Abstract: An image formation device includes a support, a fluid ejection device, and a first porous element. The support is to support movement of a substrate along a travel path, while the fluid ejection device is located along the travel path to deposit droplets of ink particles within a liquid carrier onto the substrate to at least partially form an image on the substrate. The first porous element is located downstream along the travel path from the fluid ejection device to be in contact against the substrate to remove, via electroosmotic flow through the first porous element, at least a portion of the liquid carrier from the substrate.

Abstract: An image formation device includes a support to support movement of a substrate along a travel path, a fluid ejection device, and a belt. The fluid ejection device is located along the travel path to deposit droplets of ink particles within a liquid carrier onto the substrate to at least partially form an image on the substrate. The belt is a flexible belt located downstream along the travel path from the fluid ejection device and includes a contact portion to arcuately conform relative to, and be in movable contact against, a first arcuate portion of the substrate to at least partially remove the liquid carrier from the substrate.

Abstract: In some examples, a fluid dispensing device includes a fluid chamber, a heating element adjacent the fluid chamber, and an orifice adjacent the fluid chamber. A ratio of an area of a surface of the heating element to an orifice area of the orifice is greater than or equal to 3, where the surface of the heating element faces the fluid chamber.

Abstract: An image formation device includes at least one frame portion supporting at least one emitter to emit airborne charges, at least one radiation element to emit radiation, and a fluid ejection device to deposit droplets of ink particles within a non-aqueous fluid carrier onto a substrate. Upon relative movement between the at least one frame portion and the substrate, the emitted airborne charges are to electrostatically fix, and the at least one radiation element is to emit radiation to cause at least further fixation of, the deposited particles relative to the substrate.

Abstract: A microfluidic device includes a support and a non-contact charge depositing unit to selectively emit airborne charges of a selectable polarity. The support is to releasably support a consumable microfluidic receptacle in spaced relation to the charge depositing unit to receive the airborne charges on a portion of the consumable microfluidic receptacle to cause an electric field within the consumable microfluidic receptacle to control electrowetting movement of a liquid droplet within the consumable microfluidic receptacle.

Abstract: A consumable microfluidic receptacle includes a first sheet and a second sheet. The first sheet is electrically connectable to a ground element. The second sheet is spaced apart from the first plate, wherein the microfluidic receptacle is to receive a liquid droplet between the first and second sheets. The second sheet includes an exterior surface portion to receive releasable contact from an array of individually controllable electrodes of an electrode control element to produce an electric field from the second sheet to the first sheet to selectively pull the liquid droplet through the microfluidic receptacle. The second sheet comprises a conductive-resistant matrix and a plurality of conductive paths spaced apart throughout the matrix and oriented perpendicular to a plane through which second sheet extends.

Abstract: Described herein is a liquid electrophotographic ink composition comprising chargeable particles comprising a thermoplastic resin; and a carrier liquid produced from vegetable oil or animal fat, the carrier liquid comprising an aliphatic hydrocarbon, an ester of a fatty acid and a monoalcohol, or a mixture thereof. Also described herein is a process for producing the liquid electrophoto-graphic ink composition and a liquid electrophoto-graphic printing process.

Abstract: A display device includes an electronic paper display and a ground electrode. The electronic paper display is imageable by receiving charges on a charge receiving layer of the electronic paper display. The ground electrode is opposite to the charge receiving layer of the electronic paper display and exposed at an edge of the display device.

Abstract: A device includes a first portion and a first charge source. The first portion is located along a travel path of a substrate and is to receive ink particles within a carrier fluid in a pattern onto the substrate to at least partially form an image. The first charge source is downstream along the travel path from the first portion and is to emit first polarity charges to charge the at least first color ink particles to move, via electrostatic attraction through the first carrier fluid, to become electrostatically fixed in the pattern relative to the substrate. Via the first charge source or a subsequent charge source, further emission of opposite second polarity charges are to maintain electrostatic fixation of the ink particles in the pattern relative to the substrate.

Abstract: An image formation device includes at least one frame portion supporting at least one emitter to emit airborne charges, at least one radiation element to emit radiation, and a fluid ejection device to deposit droplets of ink particles within a non-aqueous fluid carrier onto a substrate. Upon relative movement between the at least one frame portion and the substrate, the emitted airborne charges are to electrostatically fix, and the at least one radiation element is to emit radiation to cause at least further fixation of, the deposited particles relative to the substrate.

Abstract: An image formation device includes a first portion and a second portion. The first portion along a travel path is to receive droplets of color ink particles within a dielectric carrier fluid onto a substrate to form an image. The second portion includes a charge source to emit airborne charges to charge the color ink particles to move, via attraction relative to the substrate, through the carrier fluid to become electrostatically fixed relative to the substrate and to become additionally fixed, in their electrostatically fixed position, via distance-dependent, molecular forces relative to the substrate. The duration of additional fixation via distance-dependent, molecular forces may be at least greater than a duration of the electrostatic fixation.

Abstract: An image formation device includes a mixer, a fluid ejection device, and a liquid removal element. The mixer is to receive a first ink mixture of ink particles within a first non-aqueous liquid carrier in a first concentration, to receive a second non-aqueous liquid carrier, and to form a second ink mixture of the ink particles within both the first and second liquid carriers in a second concentration less than the first concentration. The fluid ejection device is to receive the second ink mixture and to deposit droplets of the second ink mixture onto a substrate to at least partially form an image via the ink particles. The liquid removal element is to remove the respective liquid carriers from the substrate to provide at least a portion of the second liquid carrier at the mixer to form part of the second ink mixture.

Abstract: A scanning carriage of a printer includes a first emitter to emit first airborne charges, a second emitter to emit second airborne charges, and a fluid ejection device interposed between the first and second emitters to deposit droplets of ink particles within a non-aqueous fluid carrier onto a print medium to form an image. The carriage is movable relative to the print medium in a first direction and an opposite second direction. In the first direction, the first emitter is to electrostatically discharge the medium and the second emitter is to induce electrostatic fixation of the ink particles relative to the medium. In the opposite second direction, the second emitter is to electrostatically discharge the medium and the first emitter is to induce electrostatic fixation of the ink particles relative to the medium.

Abstract: An image formation device includes a transfer member and a first portion to receive an electrically charged, image-receiving holder onto the transfer member. A second portion downstream from the first portion is to receive droplets of ink particles within a dielectric carrier fluid onto the electrically charged, image-receiving holder to form at least part of an image. A charge source is to emit airborne charges to charge the ink particles to move, via attraction relative to the image-receiving holder, through the carrier fluid to become electrostatically fixed relative to the image-receiving holder. A liquid removal unit is to remove at least the carrier fluid from at least a surface of the image-receiving holder. A transfer station is to transfer the ink particles of the image and the image-receiving holder together from the transfer member to an image formation medium.

Abstract: Embodiments of the present invention are directed to systems and methods for writing on electronic paper (“e-paper”) and display platforms implemented with e-paper. In one aspect, a system for writing information to electronic paper includes a writing module and an erasing unit connected to the writing module. The erasing unit is configured to erase information stored in the electronic paper. The system also includes a writing unit connected to the writing module and is configured to write information to the electronic paper. Information is written to the electronic paper by orienting the writing module so that the electronic paper passes the erasing unit prior to passing the writing unit.

Abstract: An electrophotographic printer includes a charge roller in charge-transferring relation to a photoconductive imaging portion. The printer may determine an AC voltage setpoint of the charge roller.

Abstract: A display device includes a non e-paper portion to display a first pattern element and a passive e-paper display portion to display a second pattern element juxtaposed relative to the first pattern element.

Abstract: A device includes a charge roller and a control portion. The charge roller is removably insertable to be in charge-transferring relation to, and spaced apart by a first air gap from, a photoconductive imaging portion of an electrophotographic printer. The control portion is to determine a size of the first air gap based on determination of a charging threshold voltage associated with the charge roller.

Abstract: An electrophotographic printer includes a charge roller in charge-transferring relation to a photoconductive imaging portion. The printer may determine an AC voltage setpoint of the charge roller.

Abstract: A device includes an at least partially electrically conductive transfer member to travel along a travel path and a first portion along the travel path to receive an image-receiving holder onto the transfer member. A second portion is downstream from the first portion along the travel path to receive ink particles onto the image-receiving holder to form an image, while a transfer station is to transfer the ink particles and the image-receiving holder together from the transfer member to an image formation medium. A discharge element, which is interposed between the transfer station and the first portion, is to cause discharge of the transfer member.