In one example, a flow structure for an ink supply in a liquid electrophotographic developer unit includes an elongated basin having a volume that shrinks progressively from an upstream part of the basin to a downstream part of the basin such that a rate of shrinkage increases towards the downstream part.

A liquid electrophotographic (LEP) printing device that includes a photo-imaging plate (PIP) to receive a liquid printing fluid, the liquid printing fluid including a pigment incorporated into a resin, a charge conductor, and a carrier liquid, and a transfer roller to transfer the liquid printing fluid from the PIP to a fabric substrate while wet.

In some examples, an apparatus can include a pawl including an anti-rotation surface and a spring, and a valve housing including a wedge, where the spring biases the pawl to a first position in response to the valve housing being at a closed position such that the wedge of the valve housing contacts the anti-rotation surface of the pawl to prevent rotation of the valve housing at the first position of the pawl.

In one aspect an apparatus for use in an electrographic printer is described. The apparatus includes a housing defining a cavity, a developer roller, a developer electrode for developing printing substance onto the developer roller, the electrode being arranged within the cavity, and a heater for heating printing substance to be developed onto the developer roller, the heater being arranged in the cavity.

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.

There is provided a fixing apparatus configured to fix a toner image on a print medium by spraying a fixing solution, the fixing apparatus including: a plurality of first nozzles from which the fixing solution is sprayed, a first electrode which extends in a first direction, and which faces the first nozzles in a second direction, a holding groove which accommodates the first electrode, which is configured to hold the fixing solution sprayed from the first nozzles, and which has a discharge port through, and a container configured to contain the fixing solution discharged from the discharge port. The holding groove has a bottom surface which is positioned apart from the first electrode in the second direction so that the fixing solution held in the holding groove passes between the first electrode and the bottom surface to flow toward the discharge port.

A developing cartridge includes a casing, a developing roller, a supply roller, a first agitator and a second agitator. The casing is configured to accommodate toner therein. The supply roller is configured to supply the toner to the developing roller. The first agitator is configured to agitate the toner in the casing. The second agitator is configured to agitate the toner in the casing. The second agitator is positioned between the first agitator and the supply roller. The second agitator includes a blade having a tip end configured to contact a peripheral surface of the supply roller.

Disclosed is a method to mitigate deterioration of printing fluid in a tank of a printer. The method comprises: draining printing fluid from a tank of a printer, and stopping the draining before the tank is empty, wherein the printing fluid comprises solids suspended in imaging oil, filtering the printing fluid drained from the tank, to separate at least some of the solids from the imaging oil, passing the filtered imaging oil to a reservoir; and then passing imaging oil from the reservoir to the tank. Also disclosed is a printer and a system to perform the method.

An filtration apparatus is disclosed. The filtration apparatus is to remove non-liquid contaminant from liquid carrier. The filtration apparatus may include an electrode having a first surface, wherein the electrode is to generate an electric field towards liquid carrier containing non-liquid contaminant. The filtration apparatus may include a reservoir having a wall defined at least partially by the first surface, the reservoir to house a volume of liquid carrier. The filtration apparatus may include a plurality of plates, each plate having an accumulation surface, wherein a portion of each plate is within the reservoir, so as to be submerged in the volume of liquid carrier. An electric field formed between the first surface and the accumulation surface of each plate of the plurality of plates may act on the liquid carrier, to thereby cause non-liquid contaminant to adhere to an accumulation surface of a plate of the plurality of plates. A method and a print apparatus are also disclosed.

An imaging system includes a casing with a developing chamber, a developing roller which is located inside the developing chamber and which carries a toner, and a conveying path which is located adjacent to the developing chamber inside the casing and is used to circulate the toner and to supply the toner to the developing roller. A discharge path includes an inlet, an outlet, and an intermediate portion between the inlet and the outlet. The inlet communicates with the developing chamber in the casing and is located outside the conveying path. The outlet is located between the developing roller and a photoreceptor. The intermediate portion is located outside the casing.