Abstract: A liquid discharge head unit wherein the position of the discharge ports are arranged in high precision with respect to the liquid discharge apparatus main body so that the liquid discharge head unit is capable of executing highly precise liquid discharges.

Abstract: A liquid supplying device for supplying liquid to a recording head for discharging liquid comprises a liquid container for containing liquid to be supplied to the recording head, a first connecting portion for connecting the recording head and the liquid container, and a second connecting portion having one end thereof in the liquid container, and the other end thereof being open to the air outside. For this ink supplying device, the one end of the second connecting portion connected with the liquid container is positioned lower than the height of liquid discharge port of the recording head, and an interface between liquid and the air outside exists in the second connecting portion, and by the surface tension of meniscus formed on the interface, negative pressure is generated against the liquid discharge port of the recording head.

Abstract: A liquid jet recording head packing method can effectively suppress the problem of leakage of liquid from a liquid jet recording head due to expansion of the liquid and/or the gas in the liquid chamber when the liquid jet recording head that is provided with a chamber for containing liquid is packed and subsequently subjected to abrupt changes in the environment. The liquid jet recording head comprises a head chip provided with nozzles for ejecting liquid and a frame having a second common liquid chamber for storing liquid to be supplied to the head chip. A joint rubber member is forcibly driven into each of a number of holes arranged in part of the frame and a pipe member is driven into the fissure hole of each of the joint rubber members in order to keep the inside of the second common liquid chamber in a state where it communicates to a peripheral area of the liquid jet recording head by way of the joint rubber members.

Abstract: In an ink jet head manufacturing method wherein a plurality of substrates provided with ejection energy generating elements for generating energy for ejecting ink, are arranged on a supporting member, and a top plate is mounted on the substrate to cover all of the substrates to form ink flow paths, the improvement residing in that the supporting member is provided with recesses at a supporting portion for supporting the substrates, and an adhesive material is supplied into the recesses, and thereafter, the substrate is placed on the supporting member.

Abstract: An iridium-containing nickel-base superalloy which has an orderly arrayed allow structure to be strengthened by precipitation and contains iridium dissolved in the &ggr; and &ggr;′ phases to be strengthened by solid solution, thus being improved in high-temperature strength and resistance to high-temperature corrosion.

Abstract: In the liquid discharge recording head provided with a stopper member consisting of an elastic member to be penetrated by a hollow needle member for liquid supply into a liquid preserving chamber in the recording head, the invention enables smooth insertion of the front end of the needle member into the stopper member without insertion failure. The liquid discharge recording head is provided with a head chip having a nozzle for discharging liquid, and a frame member connected thereto and having a liquid chamber for containing the liquid to be supplied thereto. A hole portion is formed in a portion of the frame member, and joint rubber is pressed into such hole portion. In the joint rubber, there is formed in advance a fissure hole, to be penetrated by a hollow needle provided in the main body of the liquid discharge recording apparatus and having fissures in not less than three directions from the crossing center of the fissures, in a plane perpendicular to the direction of depth of the hole portion.

Abstract: A liquid discharging head includes a discharge port for discharging liquid, a liquid passage communicated with the discharge port, a bubble generating area for generating a bubble in the liquid in the liquid passage, the bubble generating area including a heater for heating the liquid in the liquid passage, and a movable member disposed in a confronting relation to the bubble generating area in the liquid passage and adapted to be shifted by pressure caused by generating the bubble at the bubble generating area to direct the pressure toward the discharge port and to be returned to its initial position by negative pressure due to contraction of the bubble, and wherein resistance of the movable member against the liquid in the liquid passage when it is shifted is smaller than that when it is returned.

Abstract: The present invention provides a storing structure for storing an ink jet head comprising a nozzle communicated with an opening for discharging liquid, a liquid storing portion for storing the liquid to be supplied to the nozzle, and a liquid introduction portion for introducing the liquid into the liquid storing portion from exterior, wherein, in the ink jet head, air is housed in the liquid storing portion and the liquid is contained at least in the nozzle, and a cap unit including an elastic cap for covering an area of the opening and a liquid absorbing member disposed in the elastic cap is closely contacted with and attached, around the opening, to a face in which the opening is formed, and the liquid introduction portion is communicated with atmosphere at least when inner pressure of the liquid storing portion is increased, thereby maintaining a space within the cap unit to a wetting condition.

Abstract: There is provided a Cr-base heat resisting alloy, which contains Cr as a main component element and at least one element selected from the group consisting of Re and W in amount of from 1 atomic % to 40 atomic %.

Abstract: The present inventions offer a nickel-based single crystal alloy which has a high strength, is easy in conducting the solution heat treatment, hardly gives a harmful phase and is resistant to corrosion at high temperature.

Abstract: A cartridge is detachably mountable on holding means of an ink jet recording apparatus, which is freely reciprocating to scan for recording by discharging ink to a recording medium, and provided with a recording head for discharging ink from plural nozzles formed in parallel on the lower face of the carriage main body facing the recording medium. For the front face of the cartridge main body, an electrical connection portion having electrodes on the cartridge side is provided and electrically connected with electrodes of the holding means on holding means side, and for the rear face being opposite to the front face, an ink connection portion having supply means connected thereto is provided to supply ink to the recording head from the main tank installed on the main body of the ink jet recording apparatus.

Abstract: The present invention discloses an elastic transformable body for adjusting vapor pressure, a vapor pressure adjustment chamber using the same, an ink-jet recording head having a vapor pressure adjustment device and an ink-jet recording device having the recording head, and more particularly to a vapor pressure adjustment device for adjusting negative pressure generated in a liquid chamber in an ink-jet recording head when discharging ink. The pressure adjustment chamber has at least one elastic transformation body having a changeable volume according to vapor pressure to adjust the vapor pressure in a container communicated thereto and a support for supporting the elastic transformation body to the container.

Abstract: In a liquid injecting apparatus in which ink is supplied from an ink tank to a print cartridge detachably mounted on a carriage through a tube, connection between an ink needle at a tube side and an interconnecting member at a cartridge side can sealingly be effected positively, and ink supplying and connecting means can be made compact. A closing film having a small hole and a central slit is provided at a tip end of an interconnecting member made of soft material and fitted into an ink flow-in projection portion of the print cartridge into which an ink needle is inserted. Further, a notched needle tip end avoiding configuration is provided at a lower part of a tip end of the projection portion so that abutment between the projection portion and the ink needle can be avoided when the print cartridge is mounted and dismounted, thereby reducing a shifting amount of a needle holding member.

Abstract: A recording apparatus for effecting recording by depositing the liquid onto a recording material, the liquid container including a memory element storing information, a first electrode connected to the memory, the liquid container being detachably mountable to a recording apparatus having a second electrode to be connected with the first electrode, wherein the information is read out when the liquid container is mounted to the main assembly of the recording apparatus; wherein the liquid container is provided with such a stepped portion that portion having the first electrode is recessed, and the second electrode is resiliently urged to a first electrode provided at the recessed portion.

Abstract: A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.

Abstract: In a liquid ejection head comprising a plurality of opened liquid flow passages arranged side by side and communicating with ejection orifices through which a liquid is ejected, and thermal energy generating elements for generating thermal energy utilized to eject the liquid through the ejection orifices and generating bubbles in the liquid, at least one closed liquid flow passage closed at one end corresponding to the ejection orifice is provided in at least one end side of the plurality of opened liquid flow passages communicating with the ejection orifices. Since the closed liquid flow passage is not communicated with open air, the liquid is relatively hard to flow into the closed liquid flow passage. Accordingly, a bubble having the function of absorbing a liquid vibration caused upon ejection of the liquid is formed to extend from the interior of the closed liquid flow passage rearward. Vibrations of liquid meniscuses at the ejection orifices can be suppressed with the presence of the bubble.

Abstract: A connector cap 56 having connection openings 56A and 56B provided respectively corresponding to the other ends of ink passages 46 and 54 and a communication passage 56R for communicating the connection opening 56A with the connection opening 56B is provided detachably to the other ends of the ink passages 46 and 54.

Abstract: A nickel-base single-crystal superalloy, essentially consists of, in percentages by weight, 4.0% to 11.0% of cobalt, 3.5% to less than 5.0% of chromium, 0.5% to 3.0% of molybdenum, 7.0% to 10.0% of tungsten, 4.5% to 6.0% of aluminum, 0.1% to 2.0% of titanium, 5.0% to 8.0% of tantalum, 1.0% to 3.0% of rhenium, 0.01% to 0.5% of hafnium, 0.01% to 0.1% of silicon, and a balance being nickel and inevitable impurity, a total amount of rhenium and chromium being not less than 4.0% and a total amount of rhenium, molybdenum, tungsten and chromium being not more than 18.0%.

Abstract: A printing head has a plurality of heater boards, each of which includes a shift register to which printing data and selection data for selecting preheating pulse signals are applied as inputs, a latch circuit for latching the printing data, a selection-data latch circuit for latching the selection data, a selection circuit for selecting any one of a plurality of preheating pulse signals inputted in accordance with the latched selection data, and a plurality of heating resistors driven by the printing data or preheating pulse signals. Correction data, obtained by a head correcting apparatus, for performing printing at an average density by correcting the characteristics of each heater board is stored in a memory of the printing head. A printing apparatus decides the selection data in accordance with the correction data and sets the selection data in the selection-data latch circuit.

Abstract: A liquid discharge head unit comprises a base plate having the installation reference used as positioning reference for the installation thereof on a liquid discharge apparatus main body; a frame connected to the base plate, having liquid supply paths formed therein for conducting liquid, and liquid supply ports communicated with the liquid supply paths open to side portion; a chip unit provided with discharge energy generating elements for heating the liquid to be bubbled and discharged, discharge ports for discharging the liquid, and liquid receiving ports for receiving the liquid into the interior thereof, and connected to the frame in a state of abutting against the side portion of the frame so as to enable the liquid supply ports and the liquid receiving ports to be communicated; and a front cap having opening portion to enable the discharge ports to be exposed to the outside, being arranged to cover the chip unit and the frame by covering at least the surface having the discharge ports open thereto, and