Abstract: A carriage, movable along a predetermined path, for detachably mounting thereon an ink jet recording head includes an abutment portion for positioning the recording head in a horizontal direction; an engageable member, disposed at a side of the carriage facing in a movement direction thereof, for engaging with the recording head, the engageable member is rotatable and translatable; and an operating lever, disposed at a side of the carriage facing in the movement direction, for translating and rotating the engageable member to abut the recording head to the abutment portion, and for rotating the recording head about the abutment portion; a second abutment portion for abutment with the rotating recording head to stop it in one rotational direction; and an urging member for urging the recording head to the second abutment portion, wherein the recording head is mounted on and dismounted from the carrier by moving the operating lever in one direction and by moving it in the opposite direction, respectively.

Abstract: An ink jet cartridge includes a top plate having an orifice plate in which ejection outlets for permitting ejection of ink are formed and a portion for defining ink passages communicating with the ink ejection outlets, a heater board joined with the top plate to define the ink passage, a thin plate having a connecting region for pressing and fixing the orifice plate to the heater board, and an ink container for containing the ink to be supplied to the ink passages, wherein the thin plate is connected with the orifice plate on at least one of four sides of the orifice plate.

Abstract: An ink jet apparatus includes an ink jet recording head having a housing, an ink container in the housing for containing ink, ejection outlets for ejecting the ink supplied from the ink container, and energy generating elements for generating energy contributable to the ejection of the ink through the ejection outlets, the housing being provided with a cavity. The ink jet recording head further comprises electric contacts for supplying the energy, the contacts being provided on a wall defining the cavity and a carriage on which the ink jet recording head is mounted, the carriage being provided with a contact member having electric contacts for electric coupling with the aforementioned contacts. The ink jet recording head is mounted on the carriage with the contact member being in the cavity. The housing is provided with a window extending from a cavity to permit observation of the contact member.

Abstract: A liquid jet recording head includes a heat generating element; a heat acting zone in which heat generated by the heat generating device acts on liquid; a liquid feeding passage adjacent to the heat acting zone having a liquid supply opening for supplying liquid to the heat acting zone; a liquid ejection passage adjacent the heat acting zone and having an orifice through which the liquid is ejected; wherein a center line passing through the center of the liquid supply opening along a direction of the liquid supply from the liquid supply passage to the heat acting zone is directly across a wall constituting the liquid ejection passage.

Abstract: A method of producing a liquid-jetting head capable of recording in a plurality of colors comprises the steps of providing a base member having a plurality of heaters thereon, at least one plate member having at least one perforation therethrough with a predetermined shape and an orifice plate having holes therethrough, and laminating the base member, plate member and orifice plate together to provide a laminated liquid-jetting head having a plurality of liquid supply paths, each including a branched liquid path, formed by the perforation, from which liquid can be ejected through the orifices by the action of heat energy applied to the liquid in the liquid path by the heaters. Also disclosed is an image recording apparatus using the laminated liquid-jetting head.

Abstract: In a liquid jet recording head having a liquid discharging conduit, the ratio of the average cross-sectional area of the conduit at the liquid introducing region to that at the energy actuating region is greater than 1.

Abstract: A method of making an ink jet head with an orifice plate having an orifice extending therethrough for ink ejection involves the steps of adhering a photosensitive plate to the ink jet head to cover the outlet of a liquid passageway in the head, aligning a pattern mask with the ink passageway, exposing the photosensitive plate in-situ to radiation through the pattern mask, and removing portions of the photosensitive plate in accordance with the radiation pattern to form in the photosensitive plate an orifice aligned with the outlet.

Abstract: An ink-jet recording head comprises an ejection element for forming ink droplets, an elastic ink tank for holding therein ink to be supplied to said ejection element, a casing for containing said ink tank therein, and a communication section detachably mounted to the casing capable of communicating a space between said casing and said ink tank with the outside the casing, wherein the space inside the casing is sealed at a pressure lower than atmospheric pressure until the communication section is detached from the casing.

Abstract: A method for producing an ink jet head comprises providing ink pathways formed of a photosensitive resin on the surface of a substrate and laminating covering over said pathways, and said photosensitive resin is exposed to light and the unexposed portion thereof is removed, the covering is placed over said photosensitive resin, and thereafter said photosensitive resin is subjected to the curing treatment.

Abstract: A liquid-jetting head comprising a plurality of liquid-jetting-pressure-generating elements and a plurality of liquid-jetting orifices opposite to said elements through a liquid passage is characterized in that said passage is divided into at least two groups, and the adjacent elements of said elements are separately communicated with isolated respective liquid passages.

Abstract: A method for producing an ink jet head by providing ink pathways formed from a photosensitive resin on a substrate surface and laminating a covering over said pathways comprises providing a protective layer comprising an inorganic oxide and/or an inorganic nitride on said substrate having arranged an ink discharging pressure generating element thereon, treating the surface of the protective layer with a silane coupler or at least one organometallic compound selected from the group consisting of metal alcoholates, metal carboxylates and metal chelate compounds, and thereafter laminating the aforesaid photosensitive resin.

Abstract: A method of preserving an ink jet recording head comprises an ejecting element for flying ink droplets, an elastic ink tank portion containing an ink to be fed to the ejecting element, a casing housing the ink tank portion, and the feature is composed of housing the ink jet recording head in a preserving container, elevating the gas pressure in the preserving container to a pressure higher than atmospheric pressure, and keeping the pressurized state. An ink jet recording head is housed in the preserving container and the pressure in the container is higher than atmospheric pressure.

Abstract: In an ink jet head comprising an orifice provided on a substrate for discharging an ink to form flying droplets, an ink channel provided on the substrate and communicating with the orifice, energy generating elements provided on the substrate for generating energy to be applied for discharging the droplets, and an intermediate ink chamber provided on the substrate for holding the ink to be supplied to the ink channel, the ink jet recording head has positioning guides for aligning side and rear wall members constituting the intermediate ink chamber at predetermined positions on the substrate, respectively.

Abstract: A liquid jet recording head comprises a discharging orifice for forming flying droplets by discharging a liquid; a liquid pathway having a bent portion, an energy acting portion forming at least a part of said liquid pathway where the liquid filling the internal portion thereof is subjected to energy for droplet formation and an energy generating element for generation of droplet forming energy to be transmitted to the liquid filling said acting portion. The principal part of the wall surface of said liquid pathway is formed of a hardened photosensitive resin.

Abstract: An improved ink jet recording head is provided which comprises a substrate, and a cured film of a photosensitive resin for the formation of ink pathways and a covering over said pathways. Said covering comprises a flat plate made of a UV-light transmissive material having a photosensitive resin film adhered on both surfaces thereof. This ink jet recording head is precise, reliable and durable.

Abstract: An ink jet recording head is made by laminating on a substrate a cured photosensitive resin film for forming ink pathways on the substrate and a cover of said pathways are provided. In the head, the thicknesses of the wall defining the ink pathways, the grooves and the spaces are not more than 15 times the thickness of the cured photosensitive resin film. Such ratio of the wall thickness to the film thickness and the existence of grooves and spaces serve to prevent the peeling-off at the lamination interfaces.

Abstract: An ink jet head comprises an orifice plate constituted of a hardened film of a photosensitive resin having an orifice which extends therethrough in the direction of its thickness.

Abstract: An ink-jet head comprising an ink flow path of a hardened film of a photosensitive resin composition provided on the surface of a substrate, characterized in that a binding auxiliary layer is interposed between said substrate surface and the hardened film.

Abstract: Ink jet head and method for manufacturing the same, wherein a groove or grooves to constitute ink flow path are formed in a layer of a photosensitive composition placed on one surface of a substrate.

Abstract: An ink-jet head comprising a multi-arrayed ink flow path and ink discharging nozzles, and the ink flow paths are formed according to photo-forming technique.