Abstract: A method of making a replaceable ink cartridge uses a molded, one-piece container body with an open bottom, elongated front, back and top walls, two side walls providing major surfaces of the cartridge, and a partition attached to the side walls and extending from the top wall toward the open bottom to divide the container body into first and second compartments. A sponge-like absorbent material is inserted into the second compartment through the open bottom, which is then sealed with a bottom wall, so that the cartridge has first and second chambers communicating with each other through an opening formed by a gap between the partition and the bottom wall.

Abstract: An ink jet cartridge includes a head portion, an ink container portion; an ink passage for supplying ink from the ink container portion to the head portion, ink absorbing material in the ink container, and a filter press-contacted to the ink container. The filter adjacent to an end of the ink passage and has an area larger than a cross-sectional area of the ink passage.

Abstract: A recording head cartridge includes a recording head for ejecting recording liquid in the form of a droplet thereof; a container for containing the recording liquid; a communicating pipe for substantially balancing pressure in the container with an ambient pressure; a blocking plate disposed adjacent an inside opening of the pipe at a position away from the opening.

Abstract: A method and apparatus for coating a liquid-repellant agent on a discharge port surface of an ink jet recording head having a plurality of discharge ports, where a porous member having the liquid repellant agent is contacted to the discharge port surface and the porous member is separated from the discharge port surface without rubbing the discharge port surface.

Abstract: An ink jet head includes first and second members for constituting liquid passages by joining them together; the second member has an ejection outlet forming member having a thickness a and is provided with a jaw having a dimension b, wherein an inside end of an ejection outlet of the ejection outlet forming member is displaced by a distance c from adjacent wall of a liquid passage, with b.gtoreq.5 microns, c.gtoreq.3 microns, and 20 microns.ltoreq.a+b.ltoreq.60 microns.

Abstract: An ink jet head includes first and second members for constituting liquid passages by joining them together; and a clamp for applying a line pressure to one of the members. By using such a clamp, the pressing force can be concentrated in a line to provide a uniform pressing force to ensure reliable clamping.

Abstract: An ink jet head cartridge include an ink container and a porous material contained in the container for retaining the ink. A process for filling the ink container includes the steps of supplying ink in a quantity greater than that which the porous material can retain through a first port and removing through a second port at least a quantity of ink which the porous material cannot retain. The process can also be performed through a single port. At least one of the ports can also be used for communicating with a recording head portion of the cartridge.

Abstract: A package for an ink jet cartridge includes an opaque casing having an accommodating portion for accommodating the ink cartridge; a covering member including an evaporated aluminum layer and a nylon layer for sealing of an access opening of the casing; and a box having a rectangular parallelepiped configuration for accommodating the casing sealed by the covering member, the box being provided with an opening portion and a hook for display.

Abstract: A recording head is proposed having an ejection outlet for ejecting recording ink, and a container for the recording ink having an air vent. A single sealing member seals both the ejection outlet and the air vent so that when this sealing member is removed, both the ejection outlet and the air vent are unsealed.

Abstract: A package for an ink jet cartridge includes an accommodating container having a main body for accommodating the ink jet cartridge and a flange for sealed connection between the main body and a cover; and a holding member having an opening defining member for defining an opening for insertion of the main body therethrough and a flat member cooperable with the opening defining member to sandwich the flange therebetween, the opening defining member having an edge portion contactable to an outer edge of the flange and a peripheral portion around the outer edge.

Abstract: An ink jet head includes an ink container; a recording head having an ink ejection outlet; a supply pipe for supplying the ink from the container to the recording head; a porous material contained in the container for retaining the ink; wherein the supply pipe is pressed to the porous material to deform it, wherein a depth of the deformation is larger than a maximum length of a cross-section of the supply pipe.

Abstract: An ink jet recording head includesa substrate and a ceiling plate constituting discharge ports for discharging ink and ink passages which become pathways for the ink discharged from the discharge ports, said substrate having a heat energy generating member for generating heat energy to be utilized for discharging of ink; andan ink storage portion which stores ink discharged from said discharge ports, and also is equipped with said substrate at a part thereof, said ink storage portion and said substrate being insert molded to be constituted integrally.

Abstract: An ink tank for storing recording ink comprises an ink storage section including an ink holding member for holding ink and substantially entirely occupying an ink storage space and a ventilation section having a vent hole communicating with the interior of the ink tank with atmosphere, the ventilation section including an ink-repellent member having an ink-repellent character. The ink holding member can be formed of one porous member or two porous members, one of high and one of low porosity. The member with high porosity is provided adjacent an ink supply port. An ink jet recording head also comprises the same ink tank and an ink jet recording head section including an ink discharge port for discharging ink, an ink passage communicating with the ink discharge port and an energy generation element for generating energy utilized for ink discharged. Further an ink jet recording apparatus includes the same ink jet recording head.

Abstract: An ink tank having an ink storing portion encases an ink-absorbent member for holding ink. The ink-absorbent member comprises a porous material having therein compressed open cells. The compression ratio r.sub.1 of an apparent volume V.sub.1 before compression to an apparent volume V.sub.2 after compression (r.sub.1 =V.sub.1 /V.sub.2) and the cell number p represented by number of cells per inch in the state of V.sub.1 satisfy the relation (I) below, and p being not more than 60.100 [inch.sup.-1 ].ltoreq.r.sub.1 .multidot.p.ltoreq.200 [inch.sup.

Abstract: A substrate for a liquid jet recording head includes a plurality of built-in energy elements forming an array for generating thermal energy for ejecting liquid, built-in electrode wiring for supplying electric signals to the energy generating elements and first and second built-in temperature sensors disposed outside the array and adjacent opposite ends of the array for detecting a temperature of the substrate. First and second built-in heaters are disposed outside the array and adjacent opposite ends of the array for heating the substrate.

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 package for an ink jet cartridge includes an accommodating container having a main body for accommodating the ink jet cartridge and a flange for sealed connection between the main body and a cover; and a holding member having an opening defining member for defining an opening for insertion of the main body therethrough and a flat member cooperable with the opening defining member to sandwich the flange therebetween, the opening defining member having an edge portion contactable to an outer edge of the flange and a peripheral portion around the outer edge.