摘要:
An ink supply communication path is formed so that one end thereof is arranged outside a region confronting a pressure producing chamber at a region confronting a reservoir chamber; and an ink supply constricted port is arranged at a portion of the ink supply communication path, the portion being remotest from the pressure producing chamber. Since the pressure producing chamber is connected to the ink supply constricted port through the elongated ink supply communication path, a jet flow from the ink supply constricted port grows into a large flow along the ink supply communication path, which in turn allows air bubbles susceptible to stagnation in the vicinity of the ink supply constricted port to be discharged by such large flow.
摘要:
A recess is formed in a surface confronting an actuator unit of an ink supply inlet forming substrate. When a flow path unit and the actuator unit are bonded together using a fusible film, thermally expanded air is released into the recess to thereby reduce pressure. Further, by arranging the recess at a position confronting a pressure generating chamber, an air layer formed by the recess is allowed to function as a vibration shielding member.
摘要:
An ink supply port forming substrate 21, a common ink chamber forming substrate 25, and a nozzle plate 27 are bonded together, by inserting between them thermally fusible films 31and 32 respectively, in which are formed through holes 45 and 45 at two or more positions, and by also filling the film through holes with an adhesive that is mixed with a gap material G for adjusting the thicknesses of the thermally fusible films when they are fused, so as to form a flow path unit 30; and then the flow path unit 30 and the actuator units 1 are bonded together by inserting between them a thermally fusible film 33, in which are through holes 64 at two or more positions, and by also filling the through holes with an adhesive that is mixed with a gap material G for adjusting the thickness of the thermally fusible film when it is fused. In this structure, the extruded quantity of the thermally fusible films can be received by the through holes 45 and 64, and the gap materials G can prevent the thermally fusible films from being unnecessarily spread out.
摘要:
A method of manufacturing an ink-jety recording head in which an ink supply port forming substrate 21, a common ink chamber forming substrate 25, and a nozzle plate 27 are bonded together by inserting between them thermally fusible films 31 and 32 respectively, in which are formed through holes 45 and 45 at two or more positions, and by also filling the film through holes with an adhesive that is mixed with a gap material G for adjusting the thicknesses of the thermally fusible films when they are fused, so as to form a flow path unit 30; and then the flow path unit 30 and the actuator units 1 are bonded together by inserting between them a thermally fusible film 33, in which are through holes 64 at two or more positions, and by also filling the through holes with an adhesive that is mixed with a gap material G for adjusting the thickness of the thermally fusible film when it is fused.
摘要:
A piezo-electric/electrostrictive film type chip (50) includes: a ceramic substrate (70) having a spacer plate (74) having a windows-disposed pattern (100) having a plurality of window portions (75) and a thin closure plate (72) for closing the window portions (75) which is unitarily connected with the spacer plate; and a piezo-electric/electrostrictive working portion (71) having a lower electrode (81), a piezo-electric/electrostrictive layer (82), and an upper electrode (83), each being formed in the form of a layer and laminated in this order at a closure portion of the window (75) on the outer surface of the closure plate (72) by a film formation method. A pin hole (52) for positioning is formed in or near the center of gravity of the windows-disposed pattern (100). Deterioration of positional preciseness of the pin hole and a through hole of the piezo-electric/electrostrictive actuator can be minimized, and the piezo-electric/electrostrictive actuator can be unitarily connected with an ink nozzle member with high positional preciseness.
摘要:
To prevent fluctuations in the quantity of ink of an ink droplet that are brought about by drive frequency due to the natural vibration of common ink chambers, a relationship between the maximum drive frequency F of a laminated ink jet recording head and the natural vibration cycle T of common ink chambers that supply ink to a pressure producing chamber is set so that F/n
摘要翻译:为了防止由于普通墨水室的自然振动引起的驱动频率引起的墨滴的墨量的波动,层叠喷墨记录头的最大驱动频率F与自然振动周期T 设置供给压力产生室的墨水的普通墨水室,使得F / n <15 / 16xT或17 / 16xT
摘要:
An ink jet recording apparatus provided with: an ink jet recording head having a pressurizing chamber communicated with a nozzle opening and a common ink chamber, and a piezoelectric vibrating plate which is formed at a surface of the pressurizing chamber and deflection-displaced, the head being caused to eject an ink drop by the deflection displacement of the piezoelectric vibrating plate; a charging circuit which supplies a current to the piezoelectric vibrating plate in response to a print signal, thereby producing the deflection displacement for ink ejection, and which outputs a signal for holding a charge final voltage during a fixed time period after an end of charge; and a discharging circuit which has a first discharge time constant suitable for sucking meniscus formed immediately after ink ejection toward the pressurizing chamber, thereby preventing the meniscus from being ejected from the nozzle opening, which stops discharge in a range which is (n+3/4) to (n+1) times (where n is 1, 2, 3, . . . , or 8) a natural vibration period T of the piezoelectric vibrating plate, and which conducts discharge at a second and different discharge time constant at an elapse of a predetermined time period.
摘要:
An ink jet recording apparatus in which a nozzle ink jet recording head provided with a nozzle plate provided with apertures for jetting an ink droplet and a capping device provided with a cap unit for sealing the apertures of the nozzle plate when the recording apparatus is not used are mounted, in which in the cap unit of the capping device, in a sealed state, an ink suction port for supplying negative pressure for exhausting ink from a nozzle aperture if necessary is arranged at the bottom and an atmospheric air open port for releasing negative pressure is arranged on one side and in which a porous plate provided with plural through holes for adjusting the distribution of pressure in the longitudinal direction of the cap unit is housed between the inner bottom face and the upper open face of the cap unit and further, an ink suction method of a recording head are provided.
摘要:
An ink jet recording apparatus in which a nozzle ink jet recording head provided with a nozzle plate provided with apertures for jetting an ink droplet and a capping device provided with a cap unit for sealing the apertures of the nozzle plate when the recording apparatus is not used are mounted, in which in the cap unit of the capping device, in a sealed state, an ink suction port for supplying negative pressure for exhausting ink from a nozzle aperture if necessary is arranged at the bottom and an atmospheric air open port for releasing negative pressure is arranged on one side and in which a porous plate provided with plural through holes for adjusting the distribution of pressure in the longitudinal direction of the cap unit is housed between the inner bottom face and the upper open face of the cap unit and further, an ink suction method of a recording head are provided.
摘要:
An on-demand type ink jet print head, comprising: a plurality of ink tanks disposed at a lower position of a carriage to be independent of each other, pressure varying means provided on one of the tanks; an air release port communicating with the other one of the tanks; a head assembly provided on top of the tanks to communicate with the tanks through flow paths at both sides of the head assembly. The object of the invention is to achieve stable printing independent of the amount of ink in an ink tank and discharge bubbles in a nozzle head together with the ink.