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71. 发明专利

JP2000318149A INK JET HEAD 失效
公开(公告)号：JP2000318149A
公开(公告)日：2000-11-21
申请号：JP12839299
申请日：1999-05-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI , TOYOFUKU YOSUKE
IPC分类号： B41J2/045 , B41J2/055
摘要： PROBLEM TO BE SOLVED: To provide an ink jet head in which both high density and high speed are satisfied. SOLUTION: A plurality of nozzles are formed on the surface of a head body section 21, a plurality of pressure chambers 33 and ink reservoirs 31 are formed therein and a plurality of actuators 30 are provided on the rear surface thereof. A member 22 for forming an ink supply passage from an ink tank to the ink reservoirs 31 is forked to straddle the actuator 30. Outlets 40 of the ink supply passage 24 are provided on the opposite sides of the ink reservoir 31 so that ink is supplied from the opposite end parts thereof.

72. 发明专利

JP2000158645A INK JET HEAD 失效
公开(公告)号：JP2000158645A
公开(公告)日：2000-06-13
申请号：JP33432498
申请日：1998-11-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI
IPC分类号： B41J2/045 , B41J2/055
摘要： PROBLEM TO BE SOLVED: To improve the responsiveness of ink with respect to an actuator in terms of an ink jet head that ejects ink in a pressurizing chamber as ink drops from a nozzle by displacing the actuator having a piezoelectric element by applying a voltage to the piezoelectric element. SOLUTION: This ink jet head comprises a thin actuator 30. A pressurizing chamber 12 is formed such that the length thereof in the longitudinal direction is shorter than a length of a common ink chamber 11 in the same direction. The common ink chamber 11 is demarcated to be formed by a rear plate 24 and a rear side face of a main plate 23. A recess section 21 for the pressurizing chamber is formed on the front side face of the main plate 23 and the pressurizing chamber 12 is demarcated to be formed by the recess section 21 and a diaphragm 26. A nozzle plate 25 is provided to the front side face of the main plate 23. The diaphragm 26 is provided to the front side face of the nozzle plate 25 and a piezoelectric element 27 and an individual electrode 28 are provided to the front side face of the diaphragm 26.

73. 发明专利

JP2000071453A DRIVER FOR INK JET HEAD AND INK JET HEAD EQUIPPED WITH DRIVER 失效
公开(公告)号：JP2000071453A
公开(公告)日：2000-03-07
申请号：JP24997798
申请日：1998-09-03
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI , MIYAZONO YUTAKA , IKEDA KOICHI , IKEDA KOJI , FUKANO AKIRA
IPC分类号： B41J2/045 , B41J2/055 , B41J2/205
摘要： PROBLEM TO BE SOLVED: To stably eject ink drops of different diameters by utilizing a pulse voltage. SOLUTION: An actuator having a laminate of a piezoelectric element of 3 μm, a diaphragm of 2 μm and an individual electrode of 0.1 μm is provided. Since the actuator has a low eigen frequency, it is displaced with a lag behind application of the pulse voltage. A drive circuit applies a first pulse voltage P1 having pulse width narrower than 1/4 of the natural period of the actuator or a second pulse voltage P2 having pulse width narrower than that of the first pulse voltage P1 selectively to the piezoelectric element. Both pulse voltages P1, P2 have same voltage level. The actuator is displaced by an amount L1 upon application of the first pulse voltage P1 and ejects an ink drop of large diameter. When the second pulse voltage P2 is applied, it is displaced by an amount L2 (

74. 发明专利

JPH111004A INK DISCHARGE APPARATUS 失效
公开(公告)号：JPH111004A
公开(公告)日：1999-01-06
申请号：JP15337097
申请日：1997-06-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI
IPC分类号： B41J2/175 , B41J2/05
摘要： PROBLEM TO BE SOLVED: To enable good printing without oozing, permeation or the like even when a characteristic of a recording medium is changed variously, by performing printing to a part where printing dots formed by ink droplets of different discharge amounts from nozzle holes are in touch with each other, by means of a system carrying out the printing from ink droplets of a smaller discharge amount earlier. SOLUTION: A substrate 18 stored in a head base 25 having a common ink chamber 24 is sealed by a nozzle plate 20 having nozzle holes 21. A plurality of ink passages 15 communicating with the common ink chamber 24 are formed at regular intervals in the upper face of the substrate 18. A terminal end of the ink passage is made a pressure chamber 12. Each ink passage communicates with the nozzle hole 21. When ink droplets are discharged, it is manipulated so that dots of ink drops of at least two different discharge amounts are printing on a paper in the order from ones of a smaller discharge amount. Accordingly, mixture of ink colors is prevented and beautiful printing dots are obtained.

75. 发明专利

JPH08230189A INK JET HEAD 失效
公开(公告)号：JPH08230189A
公开(公告)日：1996-09-10
申请号：JP4288695
申请日：1995-03-02
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHIDA NAOHITO , KUHARA TAKASHI , HORIO HIDEAKI , HAMAFUKU YUKINORI
IPC分类号： B41J2/05
摘要： PURPOSE: To prevent floating and break of an insulating film to be caused by cavitation. CONSTITUTION: In an ink jet head equipped with an insulating film 9 having an opening 22 formed so as to substantially equalize exposed areas of a pair of electrodes 2a and 2b, a part or the whole of an outer peripheral end 22a of the opening 22 of the insulating film 9 in the cross direction of the electrode is formed into an arc. The width of the opening 22 of the insulating film 9 in the cross direction of the electrode is made to be less than a width of a pressure chamber. Thus, floating and break of the insulating film 9 caused by cavitation can be prevented, the pressure chamber does not deform, and an adhesion between the insulating film 9 and a nozzle passage substrate can be obtained, so that failure in discharge of ink can be reduced.

76. 发明专利

JPH08216404A INK JET HEAD 失效
公开(公告)号：JPH08216404A
公开(公告)日：1996-08-27
申请号：JP2215895
申请日：1995-02-10
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HAMAFUKU YUKINORI , HORIO HIDEAKI
IPC分类号： B41J2/05
摘要： PURPOSE: To provide an ink jet head with which generation of bubbles is stable. CONSTITUTION: A pair of signal electrodes 25a and 25b are formed by patterning on a substrate at two sides opposite to each other in a pressure chamber 27 such that a relationship between distances L1 and L2 from a point where the signal electrodes 25a and 25b approach most each other to both edges becomes L1

77. 发明专利

JPH081940A INK DISCHARGING DEVICE 失效
公开(公告)号：JPH081940A
公开(公告)日：1996-01-09
申请号：JP13556894
申请日：1994-06-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI , MATSUMOTO MITSUHIRO , HAMAFUKU YUKINORI
IPC分类号： B41J2/175 , B41J2/05
摘要： PURPOSE:To discharge conductive ink stably and assuredly for a long time. CONSTITUTION:An ink discharging device comprises an ink chamber 12 which houses conductive ink, a nozzle 15 formed in a part of the ink chamber 12, a pair of electrodes 13a, 13b arranged in the ink chamber 12, and a voltage applying means for applying voltage to the electrodes 13a and 13b. In the ink discharging device, the conductive ink is discharged from the nozzle 15 by applying voltage to the electrodes 13a and 13b, heating and boiling the conductive ink which is in between the electrodes 13a and 13b, and generating bubbles. The face on which the electrodes 13a and 13b are formed is formed of at least two members whose heat conductivities vary, and the boiling bubbles to be generated in the ink chamber 12 are contracted near a polyimide coat layer 14 having a low heat conductivity so as to separate from the electrodes 13a and 13b.

78. 发明专利

JPH0760989A DEVICE FOR DISCHARGING INK AND INK-JET HEAD 失效
公开(公告)号：JPH0760989A
公开(公告)日：1995-03-07
申请号：JP21016693
申请日：1993-08-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHIRAISHI HAJIME , HORIO HIDEAKI
IPC分类号： B41J2/175 , B41J2/05
摘要： PURPOSE:To provide a device for discharging ink and an ink-jet head by which electroconductive ink is stably discharged in a long period by providing a means for impressing voltage to a couple of electrodes provided in an ink chamber and providing dielectric membranes in the parts of the electrodes which contact the electroconductive ink. CONSTITUTION:The electrode part of a device for discharging ink is constituted of electroconductive ink 11, and ink chamber 12 filled with ink 11, a couple of electrodes 13a, 13b provided in the ink chamber 12, dielectric membranes 14a, 14b formed on the electrodes 13a, 13b a nozzle 15, a base plate 16 on which the electrodes 13a, 13b are arranged, a voltage-impressing means 17 and a channel of ink through which electroconductive ink 11 is supplied to the ink chamber 12. Electroconductive ink 11 is passed through an ink introduction port via an ink filter from an ink tank according to printing actuation and introduced into a common ink chamber and supplied from the common ink chamber to the ink chamber 12. Alumina and tantalum oxide are suitable for the dielectric membranes 14a, 14b. These are very stable electrochemically. Oxidation and dissolving of the electrodes 13a, 13b and the dielectric membranes 14a, 14b are prevented.

79. 发明专利

JPH06286156A INK JET CARTRIDGE 失效
公开(公告)号：JPH06286156A
公开(公告)日：1994-10-11
申请号：JP6451592
申请日：1992-03-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MATSUDA KOEI , MIYAZONO YUTAKA , OTSUBO KAZUMI , HORIO HIDEAKI
IPC分类号： B41J2/165 , B41J2/175
摘要： PURPOSE:To present clogging with ink and deterioration of a printing quality by preventing deterioration of a performance of a cleaning means for cleaning an end face of a nozzle. CONSTITUTION:A cleaning means 27 for cleaning residual ink 10, dust, dirt, and the like adhering to a nozzle 30 is provided in a casing 1 of an ink jet cartridge. In this manner, the cleaning means 27 can be replaced integrally with the ink jet cartridge. Therefore, deposition of a solid content of ink 3 and the like on the cleaning means 27 can be reduced to a minimum.

80. 发明专利

JPH06262763A INK JET HEAD AND PRODUCTION THEREOF 失效
公开(公告)号：JPH06262763A
公开(公告)日：1994-09-20
申请号：JP5594593
申请日：1993-03-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORIO HIDEAKI , TANAKA HISAHIRO , MATSUDA KOEI , OTSUBO KAZUMI
IPC分类号： B41J2/05 , B41J2/16
摘要： PURPOSE:To prevent the deterioration in electrode capacity by certainly developing the function of a durable film. CONSTITUTION:An ink jet head has a pressure chamber 15 filled with ink, the nozzle 12 provided to a part of the pressure camber 15, a pair of the electrodes 13a, 13b provided in the pressure chamber 15 and the durable films 14a,14b covering the surfaces of the electrodes 13a, 13b and the durable films 14a, 14b are provided so as to extend to the interior of the partition part 16 of the member constituting the pressure chamber 15. The partition part 16 and the durable films 14a, 14b are closely bonded to make the penetration of conductive ink difficult to prevent the corrosion of the electrodes 13, 13b and the peel strength of the durable films 14a, 14b is drastically enhanced to prevent the release and falling-off of the durable films.

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