Abstract: An ink cartridge for an ink jet printer having a housing having at least one wall. The ink cartridge further has at least two ink chambers for containing different ink accommodated in the housing. Ink supply ports are formed in one wall of the housing within each of the ink chambers. Each of the ink supply ports has an inner opening and an outer opening. The distance from the inner opening of a first ink supply port to that of a second ink supply port adjacent to the first ink supply port is different from a second distance from the outer opening of the first ink supply opening to that of the second ink supply port.

Abstract: Provided is a liquid-jet apparatus which can suppress liquid consumption by preventing air that can turn into bubbles from entering a liquid introducing columnar body in replacement of a liquid storage member and thus reducing a frequency of execution of a cleaning operation for discharging the bubbles inside a liquid passage. An ink introducing needle in a printer includes: a needle-like protrusion having a tapered portion whose diameter is gradually increased toward its base from its tip; and a straight portion formed linearly and continuously from the tapered portion. In the tapered portion of the needle-like protrusion in the ink introducing needle, groove portions extending to an edge portion of the tapered portion are provided.

Abstract: A liquid ejecting head includes a flow channel forming substrate in which a plurality of pressure generating chambers in communication with nozzles which eject liquid droplets are juxtaposed to each other; a diaphragm which is provided on the flow channel forming substrate and constitutes one side surface of the pressure generating chamber; and piezoelectric elements which are provided so that their leading ends abut on the diaphragm, wherein the diaphragm includes a first vibrating member and a second vibrating member disposed between the first vibrating member and the flow channel forming substrate, the first vibrating member is formed from a first composite plate made up of a first sheet member and a first supporting plate and has a first island portion which is constructed from the first supporting plate and on which a leading end of the piezoelectric element abuts, and the second vibrating member is formed from a second composite plate made up of a second sheet member and a second supporting plate and ha

Abstract: There is provided a liquid ejecting head which can introduce a liquid in a liquid storage member to a pressure chamber side via a liquid flow path from a liquid introducing needle and which can eject a liquid in the pressure chamber from a nozzle opening as a liquid drop by operation of a pressure generator. The liquid introducing needle constructed in a hollow needle shape includes an introducing needle portion in which a liquid introducing through hole for introducing a liquid in the liquid storage member is opened, and a cylindrical enlarged diameter straight portion formed at the downstream side of the introducing needle portion and whose inner diameter is enlarged than the inner diameter of the introducing needle portion. The inner space of the enlarged diameter straight portion is to be a bubble chamber which can store a bubble and the enlarged diameter straight portion includes a groove portion extending from the upstream side toward the down stream side on the inner circumference surface.

Abstract: A method for fabricating a liquid ejecting head unit including a liquid ejecting head having a nozzle line with a plurality of nozzle openings which are arranged in parallel, and a base plate on which the liquid ejecting head is mounted, the method includes: forming a second reference which is positioned to a first reference installed on the base plate, and a positioning adjusting hole on a positioning plate by a photolithographic method; attaching the positioning plate to the liquid ejecting head in such a way that the positioning adjusting hole and the nozzle openings have a predetermined arrangement; and fixing the liquid ejecting head to the base plate in a state in which the first reference and the second reference are positioned.

Abstract: A liquid ejecting head includes pressure generation elements that apply pressure change to liquid retained in corresponding pressure generation chambers to discharge the liquid from corresponding nozzle openings. Each of the pressure generation elements is fixed to a fixation plate. Nozzle lines include nozzle openings arrayed in a line. An electrical signal is sent through a flexible substrate from the outside to the pressure generation chambers. Pressure generation elements associated with the pressure generation chambers are fixed to the fixation plate, with the fixation plate being positioned between the pressure generation elements of each of two parallel nozzle lines. A wiring portion is formed at one end part of the fixation plate opposite to the other end that is closer to the pressure generation chambers. The flexible substrate is connected to the wiring portion.

Abstract: A liquid ejecting head includes a flow passage unit, a vibrator unit, a case and a reinforcing plate. The flow passage unit includes a liquid flow passage and a diaphragm portion. The liquid flow passage includes a pressure chamber that communicates with a nozzle opening. The diaphragm portion is formed at a portion corresponding to the pressure chamber and varies a volume of the pressure chamber. The vibrator unit includes a piezoelectric vibrator that is bonded to the diaphragm portion. The piezoelectric vibrator displaces the diaphragm portion. The case has an accommodation chamber formed therein to accommodate the vibrator unit. The reinforcing plate has an insertion opening portion that is formed at a position corresponding to the diaphragm portion and through which a free end portion of the piezoelectric vibrator is insertable. The reinforcing plate is interposed between the case and the flow passage unit.

Abstract: A liquid ejection head includes a channel unit with a channel substrate provided with a channel section having pressure chamber cavity rows formed by arranging a plurality of pressure chamber cavities in rows. The liquid ejection head also includes a nozzle substrate provided with a plurality of nozzle orifices formed so as to correspond to the pressure chambers. A sealing plate of the liquid ejection head seals an opening of the channel section of the channel substrate, in which the nozzle substrate is joined, with one surface of the channel substrate. The sealing plate is joined with the opposite surface of the channel substrate so that the channel unit has a series of liquid channels from a common liquid chamber to the nozzle orifices. The liquid ejection head has a head case to which the channel unit is fixed.

Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.

Abstract: A liquid jet head and apparatus prevent an increase in the viscosity of liquid in the liquid path during long term storage. The recording head has a liquid path unit 1 with nozzle openings 8, pressure generation chambers 7, liquid reservoirs 9, and a diaphragm 5, and a head case 2 bonded to the liquid path unit 1. A damper chamber 12 for releasing pressure change inside the liquid reservoir is formed at a part of the head case or seal plate 5 corresponding to the liquid reservoir 9. A release path 14B for releasing pressure in the damper chamber to the air is formed in the head case. A control path 14A communicating with the damper chamber and release path and having a specific flow resistance restricting dispersion of moisture vapor from the liquid is formed in the head case and/or seal plate.

Abstract: A method of producing a liquid ejection head comprising: a flow path forming substrate in which a space including pressure generating chambers and an ink reserving chamber is formed; a nozzle plate which is stacked on one face of the flow path forming substrate; and a vibration plate which is stacked on the other face of the flow path forming substrate is provided. The flow path forming substrate is formed by a monocrystal silicon substrate in which a plane of crystal plane orientation of (110) is the surface.

Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.

Abstract: A conductive nozzle plate is formed with a nozzle orifice. An insulative layer is formed on a first face of the nozzle plate. A head body includes a pressure chamber adapted to contain liquid therein and a pressure generating element operable to cause pressure fluctuation in the liquid. The head body is attached to a second face of the nozzle plate so as to communicate the pressure chamber with the nozzle orifice. The second face of the nozzle plate and the head body are fixed to a head case. A conductive head cover covers a part of the first face of the nozzle plate while exposing the nozzle orifice. A part of the nozzle plate and the head cover directly come into contact with each other.

Abstract: A liquid ejecting head includes a flow passage unit, a vibrator unit, a case unit, and a common base substrate. The flow passage unit includes a liquid flow passage and a diaphragm portion. The liquid flow passage at least includes a pressure chamber that communicates with a nozzle opening. The diaphragm portion varies a volume of the pressure chamber. The vibrator unit inlucdes a piezoelectric vibrator that displaces the diaphragm portion. The case unit accommodates the vibrator unit. The common base substrate connects a plurality of pairs of the case unit and the flow passage unit. The common base substrate is fixed between the plurality of pairs of the case unit and the flow passage unit.

Abstract: A liquid ejecting head includes a flow passage unit, a vibrator unit, a case and a reinforcing plate. The flow passage unit includes a liquid flow passage and a diaphragm portion. The liquid flow passage includes a pressure chamber that communicates with a nozzle opening. The diaphragm portion is formed at a portion corresponding to the pressure chamber and varies a volume of the pressure chamber. The vibrator unit includes a piezoelectric vibrator that is bonded to the diaphragm portion. The piezoelectric vibrator displaces the diaphragm portion. The case has an accommodation chamber formed therein to accommodate the vibrator unit. The reinforcing plate has an insertion opening portion that is formed at a position corresponding to the diaphragm portion and through which a free end portion of the piezoelectric vibrator is insertable. The reinforcing plate is interposed between the case and the flow passage unit.

Abstract: A liquid ejecting head includes: a flow channel unit including a flow-channel-formed substrate that defines liquid flow channels including pressure chambers communicating with nozzle openings and a sealing plate formed with a diaphragm that varies the capacities of the pressure chambers and a liquid introduction hole, the sealing plate being joined to the flow-channel-formed substrate and defining lines of liquid flow channels including pressure chambers; and a head case including a storage chamber that accommodates a pressure generator for displacing the diaphragm and a case flow channel for supplying liquid to the liquid flow channel of the flow channel unit, the diaphragm being arranged at an opening of the storage chamber on the bottom surface side and the flow channel unit being joined to the head case in a state in which the case flow channel and the liquid flow channel are communicated with each other via the liquid introduction hole, and the sealing plate is formed of a composite plate member formed b

Abstract: A liquid ejection head includes a channel unit with a channel substrate provided with a channel section having pressure chamber cavity rows formed by arranging a plurality of pressure chamber cavities in rows. The liquid ejection head also includes a nozzle substrate provided with a plurality of nozzle orifices formed so as to correspond to the pressure chambers. A sealing plate of the liquid ejection head seals an opening of the channel section of the channel substrate, in which the nozzle substrate is joined, with one surface of the channel substrate. The sealing plate is joined with the opposite surface of the channel substrate so that the channel unit has a series of liquid channels from a common liquid chamber to the nozzle orifices. The liquid ejection head has a head case to which the channel unit is fixed.

Abstract: A liquid ejecting head includes a flow passage formation section and a sealing section. The flow passage formation section includes a plurality of nozzle openings, ejecting liquid therefrom, a plurality of pressure generation parts, corresponding to the nozzle openings respectively, a plurality of liquid supply passages, communicating with the pressure generation parts respectively for supplying liquid thereto, and a plurality of partition wall parts, each separating one liquid supply passage and its corresponding pressure generation part from another liquid supply passage and its corresponding pressure generation part. The sealing section seals the flow passage formation section. The partition wall parts respectively include liquid supply passage partition wall parts which separate adjacent liquid supply passages. The sealing section has a thick part and a thin part.

Abstract: Provided is a liquid-jet apparatus which can suppress liquid consumption by preventing air that can turn into bubbles from entering a liquid introducing columnar body in replacement of a liquid storage member and thus reducing a frequency of execution of a cleaning operation for discharging the bubbles inside a liquid passage. An ink introducing needle 21 in a printer includes: a needle-like protrusion 23 having a tapered portion 48 whose diameter is gradually increased toward its base from its tip; and a straight portion 51 formed linearly and continuously from the tapered portion 48. In the tapered portion 48 of the needle-like protrusion 23 in the ink introducing needle 21, groove portions 54 extending to an edge portion of the tapered portion 48 are provided.

Abstract: There is provided a liquid ejecting head which can introduce a liquid in a liquid storage member to a pressure chamber side via a liquid flow path from a liquid introducing needle and which can eject a liquid in the pressure chamber from a nozzle opening as a liquid drop by operation of a pressure generator. The liquid introducing needle constructed in a hollow needle shape includes an introducing needle portion in which a liquid introducing through hole for introducing a liquid in the liquid storage member is opened, and a cylindrical enlarged diameter straight portion formed at the downstream side of the introducing needle portion and whose inner diameter is enlarged than the inner diameter of the introducing needle portion. The inner space of the enlarged diameter straight portion is to be a bubble chamber which can store a bubble and the enlarged diameter straight portion includes a groove portion extending from the upstream side toward the down stream side on the inner circumference surface.