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1. 发明专利

JP2001088296A INK-JET RECORDING HEAD 失效
公开(公告)号：JP2001088296A
公开(公告)日：2001-04-03
申请号：JP26585599
申请日：1999-09-20
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , YOSHIZAWA KOJI , NAKAJIMA TORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To provide an ink-jet recording head which has sufficient reliability and durability even when used at a high temperature, a high humidity and a high electric field intensity with a piezoelectric body being thinned. SOLUTION: The ink-jet recording head is constituted of a conductive metal oxide layer (conductive oxide layer in the drawing) 93 formed to a part where at least an electrode of a plus potential side among electrodes of a piezoelectric element for pressuring thereby discharging ink comes in touch with a piezoelectric body 91, and a metallic layer 92 having a superior solderability and layered on a surface of the oxide layer. Platinum oxide, ITO or the like is superior as the conductive metal oxide, and chromium/nickel/gold, platinum/gold or the like is appropriate as the metallic layer.

2. 发明专利

JPH0994965A MANUFACTURE OF INK JET RECORDING HEAD 失效
公开(公告)号：JPH0994965A
公开(公告)日：1997-04-08
申请号：JP25231195
申请日：1995-09-29
申请人： FUJI ELECTRIC CO LTD
发明人： MITSUGI MASAHIRO , MATSUMOTO HIROZO , MATSUDA MIKIHIKO
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To make it possible to largely miniaturize an ink pressurizing chamber without lowering ink discharge characteristics and without raising the piezoelectric element driving voltage by reducing the thickness of a bimorph mechanism. SOLUTION: The method for manufacturing an ink jet recording head comprises the steps of electrostatically connecting a channel board 1 made of silicon formed with an ink nozzle 2 and a groove to become an ink channel 11 containing a pressurizing chamber 4 to a borosilicate glass plate, then forming a diaphragm 8 by polishing the glass plate to a predetermined thickness, and forming a conductive layer on the surface as required. The method further comprises the steps of adhering a piezoelectric element plate to the surface of the layer, then polishing the element plate to a predetermined thickness, forming a conductive layer on the surface, and removing an unnecessary part to segment the element plate to the shape corresponding to the chamber 4, cutting to separate it to the individual recording heads.

3. 发明专利

JPH0948130A PRODUCTION OF INK JET RECORDING HEAD 失效
公开(公告)号：JPH0948130A
公开(公告)日：1997-02-18
申请号：JP20014895
申请日：1995-08-07
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , OKOCHI NOBORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To relax the limit to the difference between the coefficients of linear expansion of a substrate and a vibration plate by bonding a cavity plate and a vibration plate at temp. in the vicinity of the softening point of low m.p. glass. SOLUTION: A substrate 1 and a vibration plate 8 are bonded by using a low m.p. glass layer 12 being a bonding layer. Since the heating temp. of both of them is set to a range lower than the softening point of low m.p. glass by 50 deg.C or lower to temp. higher than that by 50 deg.C or higher, it becomes 250-450 deg.C. Since the substrate 1 and the vibration plate 8 are bonded at the temp. in the vicinity of the softening point, the flowability of glass is low and, by setting pressure force to 0.05-5kg/cm and a holding time to 10-60min, the deformation or flow of the low m.p. glass layer 2 into a passage is not generated. However, the slight uneveness of the surface of the cavity plate, that is, the substrate 1 and the vibration plate 8 can correspond to the plastic deformation of the glass layer.

4. 发明专利

JPH08300645A INK-JET RECORDING HEAD 失效
公开(公告)号：JPH08300645A
公开(公告)日：1996-11-19
申请号：JP11136495
申请日：1995-05-10
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , SHINODA MASANORI , MITSUGI MASAHIRO
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE: To easily realize the miniaturization of a recording head and easily multiply the nozzles of the recording head by a method wherein a nozzle plate, the thickness of which is at least specified times as much as the diameter as an ink nozzle, and a pressurizing and feeding member are made into an integral body by bonding or the like. CONSTITUTION: On a nozzle plate 20 made of a glass plate, ink nozzles 21 are formed through a photo-etching process at positions, which corresponding to the ink flow paths 12 of ink pressurizing and feeding members 100 and, in addition, positioning recesses 22 are formed at positions, to each of which the ink pressurizing and feeding member 100 is bonded. By bonding the ink pressurizing and feeding members 100 to the nozzle plate 20 through activation energy ray-cured material film 30, a recording head is formed. Since the recording head is formed by making the nozzle plate, the thickness of which is two times or more as much as the diameter of ink nozzle, and the ink pressurizing and feeding member into an integral body by bonding and joining, the ink nozzle, the crosssectional shape of which is a circle, can be formed and the length of the ink flow path can be made as short a necessary and the path running from an ink pressurizing chamber to the ink nozzle can be made straight.

5. 发明专利

JPH06134987A INK-JET RECORDING HEAD DEVICE 失效
公开(公告)号：JPH06134987A
公开(公告)日：1994-05-17
申请号：JP3404793
申请日：1993-01-29
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , YOSHIZAWA KOJI , TANAKA YUKIO , MASUDA MASAHIKO , TAKAHARA KAZUYO
IPC分类号： B41J2/01 , B41J2/045 , B41J2/055 , B41J2/175
摘要： PURPOSE:To stabilize the ink jetting of a recording head by preventing the non-discharge of the ink. CONSTITUTION:Surface treatment for increasing wettability with ink is provided on the inner surface of an ink path 45 formed in a holder 4. Bubbles in the ink path 4b are removed. A string-shaped filling member 7 is inserted into an ink supplying pipe 3 so as to increase the resistance in the pipe 3. Thus, the reverse flow of the ink is prevented. In this way, the non-discharge of the ink caused by the bubbles is eliminated. A filter 8 is provided at the end part of the ink supplying pipe 3, which is connected to an ink container 2. The inflow of dust contained in the ink container 2 and the ink into the ink supplying pipe 3 is prevented, and the non-discharge of the ink caused by the clogging of the ink is eliminated.

6. 发明专利

JPH0542674A METHOD FOR BONDING PIEZOELECTRIC ELEMENT 失效
公开(公告)号：JPH0542674A
公开(公告)日：1993-02-23
申请号：JP19967591
申请日：1991-08-09
申请人： FUJI ELECTRIC CO LTD
发明人： SASAKI KOSUKE , MATSUMOTO HIROZO
IPC分类号： B41J2/16
摘要： PURPOSE:To enhance a peel resistance to vibration and to transmit the displacement of a piezoelectric element to a vibration plate more efficiently. CONSTITUTION:In a method wherein a piezoelectric element 7 is bonded on the surface of a conductive vibration plate or an insulating vibration plate 6 provided with an electrode surface layer 9, a film of a coupling agent 11 is formed on the surface of the vibration plate 6 as a first process, the piezoelectric element 7 is bonded on the film with an insulating adhesive 10 as a second process, and the process is completed after the adhesive is cured.

7. 发明专利

JPH0524190A INK JET RECORDING HEAD 失效
公开(公告)号：JPH0524190A
公开(公告)日：1993-02-02
申请号：JP18273691
申请日：1991-07-24
申请人： FUJI ELECTRIC CO LTD
发明人： SASAKI KOSUKE , MATSUMOTO HIROZO
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To prevent the entrainment or stagnation of a bubble to improve a recording quality by a construction wherein in a prespace to which ink reservoirs are connected and ink is led from the external, a flow cross sectional area and a flow direction between an inlet and an outlet are gradually changed. CONSTITUTION:Ink supply paths 6 and jet flow paths 3 are formed in a cavity plate 14 so as to connect to ink reservoirs 7, ink pressurizing chambers 5, and ink jetting nozzles 2. On each surface of the cavity plate 14, a vibration plate 9 is bonded at one surface thereof. A piezoelectric element 10 is fixed on the other surface of the vibration plate 9 opposedly to the ink pressurizing chamber 5. Furthermore, a prespace 16 is connected to the ink reservoirs 7, and ink is led into the prespace from the external. In this structure, the prespace 16 is branched at an inlet part of a hole 13 in a supply jig 12 and connected to the respective ink reservoirs 7, whereby the cross sectional area thereof is gradually changed. In addition, in the branched part of the prespace 16, a projection part provided in the cavity plate 14 is disposed.

8. 发明专利

JPH0516361A INK JET HEAD DRIVING CIRCUIT 失效
公开(公告)号：JPH0516361A
公开(公告)日：1993-01-26
申请号：JP19839191
申请日：1991-07-11
申请人： FUJI ELECTRIC CO LTD
发明人： SHINODA MASANORI , MATSUMOTO HIROZO
IPC分类号： B05C7/02 , B41J2/045 , B41J2/055 , H02N2/00
摘要： PURPOSE:To reduce power consumption and heating value by suppressing excessive current flowing through the circuit during operation. CONSTITUTION:A switching element T1, resistors R3, R2 and a switching element T2 are connected in series between a pair of power supply terminals being applied with a power supply voltage VH. A piezoelectric element 7 is connected between the joint of the resistors R3, R2 and the GND. A series circuit of a switching element T3 and a resistor R1 is connected in parallel with the switching element T1. During discharge interval of the piezoelectric element 7 when the switching element T1 is turned OFF and the switching element T2 is turned ON, the switching element T3 is turned OFF to interrupt current flow through the resistor R1.

9. 发明专利

JPH04251749A DRIVING METHOD OF INK-JET RECORDING HEAD 失效
公开(公告)号：JPH04251749A
公开(公告)日：1992-09-08
申请号：JP2785691
申请日：1991-01-28
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , SASAKI KOSUKE , HISAMICHI ISAO , SHINODA MASANORI
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To improve printing quality by increasing the speed of the ink discharge of an ink-jet recording head while stabilizing ink discharge. CONSTITUTION:When ink is not discharged, voltage V1 is applied to a piezoelectric element 7 as an electromechanical transducer, and the volume of an ink pressing chamber 3 is reduced. Voltage V1 is destaticized for a fall time Ta so that the volume of the ink pressing chamber 3 is not diminished suddenly on printing. Voltage V1 is destaticized to zero, a time Tb passes, and voltage is boosted for a rise time Tc up to the voltage V2 of approximately half of voltage V1. Voltage is returned instantaneously up to voltage V1 after it reaches voltage V2, thus increasing the speed of ink discharge and stabilizing ink discharge, then improving printing quality.

10. 发明专利

JPH0453836B2 失效
公开(公告)号：JPH0453836B2
公开(公告)日：1992-08-27
申请号：JP13978886
申请日：1986-06-16
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUMOTO HIROZO , SHIINA TOSHE , YOSHIDA SHIZUYASU
IPC分类号： C04B41/90

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