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81. 发明专利

JPH10146976A INK JET PRINTING HEAD, AND INK JET PRINTING DEVICE ON WHICH THE HEAD IS MOUNTED 失效
公开(公告)号：JPH10146976A
公开(公告)日：1998-06-02
申请号：JP30471996
申请日：1996-11-15
申请人： CANON KK
发明人： INOUE TAKASHI , KANEKO MINEO , MURAKAMI SHUICHI , MIZUTANI MICHIYA , TAMURA YASUYUKI , WATABE IKUTOMO , SATO KANKI , TACHIHARA MASAYOSHI
IPC分类号： B41J2/175 , B41J2/05 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To perform a stable ink liquid drop discharging, and improve the reliability under a state wherein remaining air bubbles do not unfavorably affect the ink liquid discharging by a method wherein for an ink passage for which a protuberance is provided on a discharging port plate, a joint part is provided on adjacent energy generating elements, between an ink feeding port and the ink discharging energy generating elements. SOLUTION: On a substrate 4, an electric thermal converting element 1 which is a discharging energy generating element, and an ink feeding port are provided, and on both sides in the longitudinal direction of the ink feeding port, one line each of electric thermal converting elements 1 is arranged under a zig-zag state. Also, on the substrate 4, a coating resin layer 6 which becomes an ink passage wall to form an ink passage, is provided, and on the coating resin layer 6, a discharging port plate 5 equipped with a discharging port 2, is provided. Then, in order to suppress the growth of remaining air bubbles 9 to a degree wherein the remaining air bubbles 9 unfavorably affect the ink feeding characteristics, a protuberance 7 is provided directly above the ink feeding port on the internal surface of the discharging port plate, and in addition, a joint part which is co-owned by adjacent elements 1, is provided between the ink feeding port and the electric thermal converting element 1 for the ink passage.

82. 发明专利

JPH1095121A BUBBLE-JET HEAD AND BUBBLE-JET APPARATUS USING THE SAME 失效
公开(公告)号：JPH1095121A
公开(公告)日：1998-04-14
申请号：JP20665097
申请日：1997-07-31
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , SHIOTANI MAKOTO , TAMURA YASUYUKI , KANEKO MINEO
IPC分类号： B41J2/175 , B41J2/05
摘要： PROBLEM TO BE SOLVED: To enable the reduction of an ink refilling time and high speed recording by making an area in which the supply route breadth of a cross section perpendicular to the ink discharge opening direction from the opening end of an ink branch supply route is gradually narrowed from the opening end toward an ink heating part. SOLUTION: Since an ink refilling time is caused by the radius of curvature of a meniscus and capillary force determined by the surface tension of ink, and the capillary force increases with the reduction of the radius of curvature of the meniscus, the force increases with the reduction of an ink supply passage breadth near a heater part 32ai. A contraction passage part 48a is expanded from a point Pc toward a parallel passage part 46a so that residual bubbles in ink are discharged easily to an ink discharge side without being retained. Besides, since the the passage 48a is expanded gradually toward the passage part 46a, the generation of a vortex which causes the bubbles to remain is to be checked.

83. 发明专利

JPH0447948A METHOD OF DRIVING INK JET HEAD 失效
公开(公告)号：JPH0447948A
公开(公告)日：1992-02-18
申请号：JP15725690
申请日：1990-06-15
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , TAMURA YASUYUKI
IPC分类号： B41J2/05 , B41J2/07 , B41J2/365
摘要： PURPOSE:To keep the temperature of a substrate constant with a simple structure and provide a unified temperature distribution by controlling to obtain a nearly con stant expression (Emax -/(Vmax-V), when E not equal to Emax, assuming that a heat energy to be generated at the substrate when an ink jet head discharges an ink of the maximum volume Vmax is Emax, an ink discharge volume responding to an image signal is V, and a heat energy to be generated at that time is E. CONSTITUTION:A W1 A pulse width W1 is set far a stable ejection of ink under a voltage Vop appropriate for a driving circuit. By the pulse width W1, all heat generating elements 102 for discharging are driven at every fixed interval gamma. When the temperature of a support plate 106 of the head reaches a constant value, that temperature is made to be Tinfinity . Next, an electric pulse having the same voltage Vop and a pulse width W' shorter than the W1 appropriate to an extent that the ink does not discharge is supplied to the heat generating element, and the temperature is measured in the same manner. When the temperature reaches the constant value, the temperature is made to be T'infinity . The W1 is changed so as to make the same measurement. When it reaches T'infinity Tinfinity, W' at that time is made to be W2. Thus, (Emax-E) / (Vmax-V) can be kept nearly constant by deciding the pulse widths W1, and W2.

84. 发明专利

JP2000168089A METHOD AND APPARATUS FOR INK-JET PRINTING 失效
公开(公告)号：JP2000168089A
公开(公告)日：2000-06-20
申请号：JP34866998
申请日：1998-12-08
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , MIZUTANI MICHIYA
IPC分类号： B41J2/05 , B41M5/00
摘要： PROBLEM TO BE SOLVED: To enable preferable ejection without generating ejection failure of ink droplets such as droplet split by time division of an ejection energy generating means into a plurality of groups in a predetermined driving cycle, and providing a driving means for providing a predetermined relationship in the driving interval among the groups. SOLUTION: A CPU 10 controls each part of the apparatus according to a processing procedure stored in a ROM 10A and a work area of a RAM 10B. The CPU 10 supplies driving data of a heat generating member and a driving signal to a head driver 30A so that a printing head 30 ejects ink droplets. The CPU 10 controls a carriage by a motor 20 via a motor driver 20A as well as a paper feeding motor by a motor driver 50A for the time division drive of an energy generating means in a plurality of groups. Among a plurality of driving intervals of the groups, the driving interval in the groups to be driven later is provided larger than the driving interval in the groups to be driven earlier so as to prevent generation of ejection with droplet split.

85. 发明专利

JPH10119277A INK JET HEAD AND INK JET RECORDER IN WHICH THE HEAD IS USED 失效
公开(公告)号：JPH10119277A
公开(公告)日：1998-05-12
申请号：JP27814596
申请日：1996-10-21
申请人： CANON KK
发明人： MURAKAMI SHUICHI , TACHIHARA MASAYOSHI
IPC分类号： B41J2/175 , B41J2/05 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To record an accurate straight line on a recording face of a recording medium by a method wherein in a plurality of ink branched feed routes, inertance and fluid resistance from an opening part in each ink branched route to its discharge opening are allowed to have equal values with each other. SOLUTION: Ink discharge openings 70A-70H respectively opposed to heaters of no.1-no.8 blocks on a drive substrate 54, are formed on an orifice plate 70, and ink branched feed routes 72, 74 conducting ink from an ink feed opening part to each heater are formed. Then, the orifice plate 70 is fixed onto the drive substrate 54. In this case values of inertance and viscosity resistance from an end part of the heater in each ink branched feed route 72, 74 to a peripheral part of the ink feed opening part are equalized. Thereby, dispersions in ink discharge velocity of ink discharged from the discharge opening and its ink discharged amount can be reduced, and an accurate straight line can be recorded on a recording face of a recording medium.

86. 发明专利

JPH1044440A INK JET HEAD AND INK JET PRINTER 失效
公开(公告)号：JPH1044440A
公开(公告)日：1998-02-17
申请号：JP20087096
申请日：1996-07-31
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , TAMURA YASUYUKI , KOMURO HIROKAZU
IPC分类号： B41J2/01 , B41J2/16 , B41J2/175 , B41J2/51
摘要： PROBLEM TO BE SOLVED: To reduce cross talk generated in an ink jet head and to eliminate the shift of ink impinging positions generated by the difference of emitting timing between respective emitting orifices. SOLUTION: In an ink jet head, heaters h1-h32 for generating heat energy utilized in the emission of ink and 32 emitting orifices provided in concentric relation to the heaters are provided so that the positions in the scanning direction of the ink jet head are made respectively different. With respect to drive timing in the case of the time sharing driving of the heaters, the distance in the above mentioned direction of two heaters driven in adjacent timing from an aspect of a time is made constant and the heaters driven in the same and adjacent timing from an aspect of time are arranged to be spaced apart from each other.

87. 发明专利

JPH0825273B2 失效
公开(公告)号：JPH0825273B2
公开(公告)日：1996-03-13
申请号：JP24610984
申请日：1984-11-22
申请人： CANON KK
发明人： YANO YASUHIRO , TACHIHARA MASAYOSHI , SUZUMURA MASAMICHI
IPC分类号： B41J2/01 , B41J25/34

88. 发明专利

JPH07323569A INK JET RECORDING APPARATUS 失效
公开(公告)号：JPH07323569A
公开(公告)日：1995-12-12
申请号：JP11866694
申请日：1994-05-31
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , TAMURA YASUYUKI
IPC分类号： B41J2/175 , B41J2/125 , B41J29/46
摘要： PURPOSE:To prevent possibility such that recording becomes impossible suddenly by the consumption of the ink in an ink tank or the life of an ink jet head itself in the ink tank separate type ink jet head of an ink jet recording apparatus. CONSTITUTION:An ink tank 12 supplying ink to a common liquid chamber 17 and an ink detection part 20 having a plurality of test heaters 22 different in breaking energy arranged in the common liquid chamber 17 in an electrically parallel state are provided in the common liquid chamber 17 having a single nozzle or a plurality of nozzles of the head chip 11 of an ink jet head 1. Further, a means for detecting the breaking of the test heaters 22 by the application of test voltage and a means for informing the generation of this breaking to a user are provided.

89. 发明专利

JPH0777968A METHOD AND DEVICE FOR CHARACTER GENERATION 失效
公开(公告)号：JPH0777968A
公开(公告)日：1995-03-20
申请号：JP16140893
申请日：1993-06-30
申请人： CANON KK
发明人： ASAI AKIRA , TACHIHARA MASAYOSHI
IPC分类号： G09G5/24 , G06T11/20 , G06T15/00
摘要： PURPOSE:To store and reproduce plural fonts, etc., by an easy method by storing the shape of a solid body whose section show character shapes of another font when the solid body is cut with plural planes and cutting the solid body with a cutting surface corresponding to a desired font. CONSTITUTION:When a character I is represented in three dimensions, the character is cut with a plane perpendicular to a Z axis. A space area (0

90. 发明专利

JPH05185592A LIQUID JET HEAD 失效
公开(公告)号：JPH05185592A
公开(公告)日：1993-07-27
申请号：JP597292
申请日：1992-01-16
申请人： CANON KK
发明人： TACHIHARA MASAYOSHI , TAMURA YASUYUKI , SHIOTANI MAKOTO , TAKAHASHI HIROTO , INADA GENJI , MAEDA HIROYUKI , HIRASAWA SHINICHI
IPC分类号： B41J2/05
摘要： PURPOSE:To execute high-speed recording stably with a liquid jet recording head composed of a plurality of ejection ports constructed in high density. CONSTITUTION:On ejection of liquid, bubbles produced by heat generated by an electrothermal energy conversion body 5 grow in a part of maximum width on an ejection port 2 side of the center of the electrothermal energy conversion body 5, and because of this part of maximum width, impedance in the direction of ejection can be reduced. On refilling of the liquid, impedance can be reduced because of an expanding tube formed toward the ejection port 2 side from a supply port, while impedance on ejection can be increased thereby.

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