PURPOSE:To enable the development of capacity having excellent faithfulness and certainly in the response to a recording signal and especially excellent in durability, by arranging a partition wall in the vicinity of a heat acting surface in such a shape that the flowline width of a liquid flowline is not made constant. CONSTITUTION:A heat acting surface 115 indicates a part where a heat generating part 116 is projected to an upward vertical direction with respect to the bottom surface of a liquid chamber while the vicinity of the heat acting surface 115 indicates a part where the distance from the end part of the heat acting surface 115 is in about 100mum and the indefiniteness in the flowline width W of a liquid flowline indicates both cases one of which is widen in the flowline width and the other of which has a part where the flowline width becomes narrow. When the flowline width is not constant in the vicinity of the heat acting surface, the resistance of a liquid stream during the replenishment of ink caused by the emission of the ink and the disappearance of bubbles becomes unbalanced in the vicinity of the heat acting surface and, therefore, the ink is re- replenished in the arrow direction. Bubbles B1 resulting in impact generated on the heat acting surface disappear as bubbles B2 at a position shifted from the heat acting surface and, therefore, the destruction of the heat acting surface, in its turn, an electricity- heat converting body can be avoided.

Liquid jet recording apparatus

A printing machine is provided, comprising a thin film having first and second surfaces connected by a plurality of hole or recess portions and movably positioned; an ink tank for supplying ink to the hole or recess portions; a thermal head member having a plurality of thermal head elements in contact with the first surface of the film; a driving circuit for selectively driving the thermal head elements; and a recording paper feeding mechanism to feed recording paper adjacent the second surface of the film. The ink fills the holes or recess portions, and the thermal head element is selectively driven by the driving circuit when one thermal head element corresponds to a plurality of holes or recesses of the film, whereby ink is sprouted or jetted from a plurality of the holes or recesses onto the recording paper by bubble pressure caused by heat from the thermal head element. Color printing is also possible with the apparatus of the invention.

Ink-belt bubble propulsion printer

A silver halide photographic light sensitive material is disclosed, comprising a support having on the support a silver halide emulsion layer comprising silver halide grains, wherein at least 50% of the total grain projected area is accounted for by tabular grains having an aspect ratio of 2 or more, at least one of subbing layers provided on both sides of the support comprising colloidal tin oxide sol.

Silver halide photographic light sensitive material

An internal junction organic electrolumines-cent device is disclosed comprised of, in sequence, an anode, an organic hole injecting and transporting zone, an organic electron injecting and transporting zone, and a cathode The organic electron injecting and transporting zone is comprised of an electron injecting layer in contact with the cathode and, interposed between the electron injecting layer and the organic hole injecting and transporting zone, a blue emitting luminescent layer comprised of an aluminum chelate containing a phenolato ligand and two Rs-8-quinolino-lato ligands, where Rs substituents are chosen to block the attachment of more than two substituted 8-quino-linolato ligands to the aluminum atom The presence of the phenolato ligand shifts device emission to the blue region of the spectrum and increases emission efficiency Device emission is shifted to even shorter blue wavelengths and increased operating stability can be realized by the incorporation of a pentacarbocyclic aromatic fluorescent dye

Blue emitting internal junction organic electroluminescent device (ii)

A high-quality image is printed with reduced bleeding in colors that may appear at a boundary between a black image and a color image. A head for ejecting black ink and a head for ejecting color ink perform three times of scanning while feeding is carried out therebetween for moving the printing medium by four pitches of ejection openings arranged on the heads, different ejection openings are caused to correspond to a scanning area, which corresponds to the four pitches, and multi-pass printing is performed to complete printing on the area. The black head completes printing of the black image, and then, the color head completes printing of the color image adjacent to the black image. The arrangement of ejection openings is determined so that between last scanning for completing printing of the black image and the first scanning for printing of the color image, scanning with no performing printing exists.

Ink jet printing apparatus and ink jet printing method

An ink jet recording method which comprises contacting or bringing closer an electro-thermal transducer with or to a recording liquid in an operating chamber having a discharge orifice, introducing into the electrothermal transducer an input pulse signal with its pulse width being in a range of from 01 μsec to 500 μsec, said input pulse signal being introduced in such a manner that its input cycle becomes at least three times as large as said pulse width, discharging and sputtering said recording liquid from said discharge orifice in the form of fine droplet in accordance with operating force developed within said operating chamber, and effecting image recording on the surface of a recording medium with the liquid droplets

Ink jet recording method

A method for forming a deposition film by introducing a starting gas for formation of a deposition film into a reaction chamber housing a substrate therein and forming a deposition film on the substrate by irradiation with light comprises performing deposition by using a monochromatic light and a continuous polychromatic light in combination and projecting the lights on the substrate on which the deposition film is to be formed.

Method of forming deposition film

The present invention relates to an image forming process and an apparatus therefor for forming an image with liquid ink in response to output information from a facsimile or a computer, or optical information. In the present invention there is employed a screen member provided with a plurality of through holes and control electrodes respectively provided in the vicinity of said through holes, and voltages corresponding to the image information signals are applied to said control electrodes to selectively introduce electroconductive liquid ink into said through holes thereby forming an image, said image then being transferred onto or made to fly toward a recording material such as paper.

Image forming process

A liquid droplet forming apparatus is improved by selecting particular conditions concerning total opening area of communicating ports, an area of the region having the communicating ports; various lengths in the direction along the axis of the actuating chamber; and volumes of various portions in the actuating chambers and the common liquid chamber.

Liquid droplet forming apparatus

A liquid droplet ejecting recording head comprises liquid ejecting portion including an orifice for ejecting liquid droplets and a heat actuating portion communicated with the orifice, and an electrothermal transducer as a means for generating heat energy, the heat energy acting on the liquid at the heat actuating portion for ejecting liquid droplets, characterized in that the part contacting the liquid of the heat actuating portion is made of a material whose ΔW is not more than one-tenth of 1 mg/cm2 where ΔW is a decrement weight of the material per unit area in mg/cm2 at a time "t", when subjected to a weight decreasing test, the "t" being a time at which ΔW(Al) is 1 mg/cm2 where ΔW(Al) is a decrement weight of an aluminum plate of 99.9% in purity per unit area of the tested surface when subjected to the weight decreasing test.

Yukuo Nishimura

Papers

Ink jet recording method

Method of forming deposition film

Image forming process

Liquid droplet forming apparatus

Liquid droplet ejecting recording head