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: 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: 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 first sheet and a second sheet are prepared. First holes on the first sheet are perforated. The second sheet is laminated on the first sheet so as to cover at least the first holes and to form a laminated body. The filters are punched from the laminated body such that each of the filters comprises the first sheet formed with at least one of the first holes and the second sheet.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric layers therebetween. The first internal electrode layers are exposed to at least a first end face of the substrate, and the second internal electrode layers are exposed to at least a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. The first external electrode layer is electrically connected to the first internal electrode layers. A second external electrode layer is formed on at least the second end face and the third end face. The second external electrode layer is electrically connected to the second internal electrode layers, and is electrically independent from the first external electrode layer.

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 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 an ink jet recording head, which includes (1) fixing a passage unit in which a nozzle pate having a nozzle opening, a spacer forming a common ink chamber, and an elastic plate having a thick portion abutting against an end of a piezoelectric vibrating element are stacked, to an opening of a frame having an overhang portion which overhangs to a vicinity of the thick portion, (2) inserting a vibrating element unit into the frame, the vibrating element unit being configured by fixing piezoelectric vibrating elements operating in a longitudinal vibration mode to a fixing substrate, and (3) injecting an adhesive into a groove formed in a region opposing the fixing substrate of the frame.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction.

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: In order to provide a silicon wafer break pattern that stabilizes the location and shape of the breaks at weak spots of the break pattern and that reduces waste, the through-holes of the break pattern is disposed along a scribe line, a first group of the through-holes are substantially disposed on only a first side of the scribe line, and a second group of the through-holes are substantially disposed on only a second side of the scribe line.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric layers therebetween. The first internal electrode layers are exposed to at least a first end face of the substrate, and the second internal electrode layers are exposed to at least a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. The first external electrode layer is electrically connected to the first internal electrode layers A second external electrode layer is formed on at least the second end face and the third end face. The second external electrode layer is electrically connected to the second internal electrode layers, and is electrically independent from the first external electrode layer.

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: In order to provide a silicon wafer break pattern that stabilizes the location and shape of the breaks at weak spots of the break pattern and that reduces waste, the through-holes of the break pattern is disposed along a scribe line, a first group of the through-holes are substantially disposed on only a first side of the scribe line, and a second group of the through-holes are substantially disposed on only a second side of the scribe line.

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: Grooves 21 are formed in the side of an ink supply needle 17 opposite a filter 19 in order to induce the movement of ink using capillary attraction, and so that the grooves 21 ensure that ink can flow along a path to a recording head regardless of whether an air bubble is present.

Abstract: A fixing plate includes a first region and a second region. A vibrator assembly includes a plurality of piezoelectric vibrators, a drive electrode formed on each of the piezoelectric vibrators, and a common electrode formed commonly to the piezoelectric vibrators. The vibrator assembly is bonded onto the first region in a cantilevered manner. A sheet-shaped wiring board supplies a drive signal to the drive electrode and applies a bias potential which is higher than a ground potential to the common electrode. A controller IC controls the drive signal. The controller IC has a first face mounted on the wiring board, and a second face opposing to the first face in which a semiconductor surface is exposed. An insulating layer is interposed between the second region of the fixing plate and the second face of the controller IC.