Abstract: Disclosed are an image forming method including forming images in an image-forming material by means of a thermal printer head, wherein the image-forming material including a compound capable of releasing a strong acid under the action of heat and a compound capable of forming a dye by the reaction with an acid, and an image-forming material suitable for printing with a thermal head.

Abstract: The durability of ink jet print heads is improved when the intermediate photoresist layer contains a poly(amic acid) prepared from at least one dianhydride and at least one aliphatic diamine.

Abstract: A method of producing an ink jet recording head comprises the steps of forming a discharge port by irradiating a discharge port forming member, which is integrally provided on a top plate provided with a groove of an ink flow path communicated with the discharge port for discharging ink, and in which the discharge port is formed, with a laser beam having ununiform intensity distribution of the light beam, from the groove side and forming the ink flow path by connecting the top plate to a substrate, with the groove being positioned inside.

Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 10 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.

Abstract: An ink jet recording medium which comprises a support and a layer comprising fine particles of a thermoplastic organic polymer, formed on at least one side of the support, so that said fine particles of a thermoplastic organic polymer are dissolved or melted after ink jet recording to form a layer wherein said fine particles of a thermoplastic organic polymer are fused to one another, wherein said fine particles of a thermoplastic organic polymer have an average particle size within a range of from 1 to 20 &mgr;m.

Abstract: An ink-jet recording method capable of providing a record that has highly transmissible image density and a great maximum image density, a good tone and an excellent gradation. The ink-jet recording method uses different concentrations of black ink to make a graded record, wherein in addition to a set of inks employed for the graded recording, an ink containing a pigment or the like for increasing the maximum density after the recording on a recording medium is also applied to the recording medium.

Abstract: A high efficiency thermal inkjet printhead which uses a novel resistor system. The printhead includes a support structure, at least one layer of material which comprises at least one opening therethrough, and at least one ink expulsion resistor located within the printhead between the support structure and the layer of material having the opening therein. The resistor is produced from at least one metal silicon nitride composition. Numerous benefits are achieved by this development including (A) reduced resistor current consumption and greater energy efficiency; (B) increased bulk resistivity of the resistor elements compared with prior systems; (C) cooler printhead operation; (D) multiple economic benefits including the ability to use lesscostly, high voltage/low current power supplies; and (E) improved reliability, stability, and longevity levels in connection with the printhead and resistor elements.

Abstract: A method for manufacturing an orifice plate used for a liquid discharge provided with discharge port for discharging liquid comprises the steps of preparing a non-conductive plate having recessed portion formed on the circumference of the flat portion corresponding to the discharge port, forming a first conductive material peelable from the non-conductive plate only in the recessed portion of the non-conductive plate, forming a plate member by plating the first conductive material with a second conductive material by electroforming method after the formation of the first conductive material, and obtaining the orifice plate having the discharge port by peeling off the plate member from the non-conductive plate. With the method thus arranged, it is possible to materialize the same precision as in the glass mask used for photolithography, and make the variation of orifice areas smaller for the formation of highly densified orifices.

Abstract: An ink jet printing method, comprising the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink jet recording elements comprising a substrate having thereon an image-receiving layer comprising inorganic particles encapsulated with an organic polymer having a Tg of less than about 20° C., the weight ratio of the inorganic particles to the organic polymer being from about 20 to about 0.2; C) loading the printer with an ink jet ink composition; and D) printing on the ink jet recording element using the ink jet ink in response to the digital data signals.

Abstract: A printing device according to the present invention assures stable mixing and ejecting operations without provision of complicated mechanisms such as valves. The printing device includes an ejecting nozzle with a first discharge opening and a metering nozzle with a, second discharge opening, which are provided separately from each other to feed two kinds of fluids through the first and second discharge openings, respectively. The two kinds of fluids are mixed together to form a fluid mixture to be ejected toward a recording medium. A minimum distance d between the first and second discharge openings of the metering and ejecting nozzles is in the range of 0≦d≦5(S1) where S1 stands for an opening area of the first discharge opening of the ejecting nozzle.

Abstract: The invention provides inkjet print head which has an Anti-wetting Coating of a polymer material, which is produced with the utilization of at least one Compound (I) XaRbSiR1(4-a-b) with X=hydrolyzable group, R=possibly substituted Alkyl, Aryl, Alkenyl, Alkylaryl or Arylalkyl, R1=organic remainder with at least one polymerizable group, a=to 3, b=0 to 2. In addition, a Process for the Manufacture of the Print Heads is made available, as well as a Means for the Coating of same.

Abstract: A heater chip module is provided comprising a carrier adapted to be secured directly to an ink-filled container, at least one heater chip having a base coupled to the carrier, and at least one nozzle plate coupled to the heater chip. The carrier includes inner side walls and a support section which together define an inner cavity. An edge feed heater chip is coupled to the carrier support section. The heater chip includes side walls. The support section includes first and second passages which define first and second paths for ink to travel from the container to the inner cavity. The inner cavity and the heater chip are sized such that a first side wall of the heater chip is spaced from a first inner side wall of the carrier and a second side wall of the heater chip is spaced from a second inner side wall of the carrier. A nozzle plate is coupled to the heater chip and the carrier. The nozzle plate has a width such that the nozzle plate extends over an outer surface of the carrier.

Abstract: In an apparatus to perform printing by ejecting an ink and a printing quality improving liquid for making a coloring agent in the ink insoluble or coagulated, reaction between the printing quality improving liquid and the coloring agent of the ink is certainly caused. Namely, after ejecting the printing quality improving liquid from a head, Bk ink, Y ink, M ink and C ink are ejected through heads within a given period, e.g. 500 msec. By this, the printing quality improving liquid may react with the coloring agent of the ink before penetrating into a printing medium to certainly make the coloring agent insoluble or coagulated.

Abstract: An ink jet recording medium for a pigment ink, which including a substrate, a porous layer of alumina hydrate having a thickness of from 1 to 200 &mgr;m, formed on the substrate, and a water-soluble resin layer having a thickness of from 0.01 to 50 &mgr;m, formed as an upper layer thereon.

Abstract: An ink jet printing method, including the steps of: A) providing an ink jet printer that is responsive to digital data signals; B) loading the printer with ink-receptive substrates; C) loading the printer with an ink jet ink composition comprising from about 0.5% to about 30% by weight of a pigment, a carrier and a hydrophobically capped oligomeric acrylamide dispersant in a ratio of dispersant:pigment from about 0.1:1 to about 5:1; and D) printing on an ink-receptive element using the ink jet ink in response to the digital data signals.