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-jet cartridge includes an ink-jet head body and an ink storage portion which include coupling members, respectively. The ink storage portion includes an absorbing member, while the ink-jet head body includes an ink communication pipe with an ink-introducing port held in pressure abutment with the absorbing member to compress the absorbing member when the ink-jet head body is coupled to the ink storage portion. This assures a good flow of ink to the ink-jet head body.

Abstract: A liquid jet recording head comprises a first substrate provided with an energy-generating element that generates an energy for discharging a recording liquid, a second substrate joining to the first substrate, the second substrate having grooves that form passages for the recording liquid in accordance to the position of the energy-generating element at the joining and being integrated with a discharge port-forming member that forms discharge ports for the recording liquid on the front side of the grooves, and a force-endowing member that tightly fixes the first and second substrates to each other by a mechanically endowed force. The head has a high reliability and can be produced in a high productivity at a low cost with a smaller number of production steps.

Abstract: A liquid-jet recording head comprises an ejection opening for ejecting liquid, a liquid path communicating to the ejection opening and a substrate having an energy-generating element provided in correspondence with the ejection opening. The substrate is combined with a heat-capacity member and the heat accumulated in the substrate is efficiently released through the heat-capacity member.