Methods and articles used to degass liquids in a drop ejection device are disclosed. For example, a drop ejection device having a flow path in which fluid is pressurized for ejecting a drop from a nozzle opening, and a deaerator including a fluid reservoir region, a vacuum region, and a partition between the fluid reservoir region and the vacuum region, the partition including a wetting layer and a non-wetting layer and one or more channels extending through the wetting and non-wetting layers, w...

A printhead comprising: a housing having an inlet for the supply of ink; an array of ejection locations for the ejection of ink droplets; an ink supply pathway for the passage of ink from the inlets to the ejection locations, wherein the ink supply pathway comprises at least one divergent ink manifold; and an outlet manifold for receiving ink from the ejection locations.

Devices used to degas and eject fluid drops are disclosed. Devices include a flow path that includes a pumping chamber in which fluid is pressurized for ejection of a fluid drop, and a semi-permeable membrane including an inorganic material having an outer surface positioned in fluid contact with the flow path. The membrane allows gases to pass therethrough, while preventing liquids from passing therethrough.

The present invention relates to a printhead for ejecting ink. The printhead comprises a first row of nozzle pods, and each nozzle pod comprises a plurality of nozzles arranged in rows and ranks. There is also provided a first ink supply for storing a first type of ink. The first ink supply is in fluid communication with the nozzles in the first row. The printhead also comprises a printhead controller for controlling the firing of the nozzles. In one embodiment, the printhead controller controls...

An electrochromic printhead and a method of construction thereof in which the printhead is fabricated from an array of spaced, precisely positioned, small glass tubes. The array of glass tubes defines an array of cylindrical apertures extending through the printhead to form a printing pattern at a printing surface. Each cylindrical aperture has a conductor therein as an active electrode, which defines one dot of an array or matrix of dots possibly formed by the electrochromic printer. An additio...

A thermal printhead comprising a substrate, heat generating thin film resistor bodies formed on the substrate and electric conductors for supplying the heat generating thin film resistor bodies with electric power, characterized in that the heat generating thin film resistor bodies are made of a Cr-Si alloy subjected to a stabilization aging heat treatment.

Disclosed is a thermal printhead made of an insulating substrate, and a heat generating resistor layer formed on the substrate, and wherein the heat generating resistor layer is supplied with electric current. The heat generating resistor layer is made of Cr-Si-SiO alloy, and with the Cr, Si and SiO contents falling within a region defined by points A, B, C and D in a triangular diagram, where the points A, B, C and D are determined as follows:

An improved thermal printhead in which the base plate is provided with a print-end surface which is narrower than the thickness of the base plate by forming an inclined surface along one of the corner edges of the end surface adjoining one of the major surfaces of the base plate. Alternatively, a narrower end surface serving as the print-end surface may be defined by forming inclined surfaces along the two corner edges of the original end surface of the base plate. In either case, by appropriate...

A structure of a thermal head of the type using an ink paper or a heat-sensitive paper is disclosed. The structure includes an array of units each comprising a single resistance body and a pair of electrode members which respectively correspond to a first and a second heat-generating portions positioned at both ends of the resistance body, the electrode members being adapted to energize the resistance body. At least one of the first and second heat-generating portions of the resistance body is d...

A method of reducing the need for a reverse indexing capability during multi-pass printing. In environments permitting narrow line spacings, requiring multiple passes to print a line, and where platen indexing is by full head height increments, indexing for completing printing for one line may result in an overshooting of a subsequent print line. Without reverse indexing capabilities, the subsequent line cannot be printed at a proper location or on the subsequent print line. A solution to reduce...