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1. 发明专利

DE3108885A1 未知
公开(公告)号：DE3108885A1
公开(公告)日：1982-01-28
申请号：DE3108885
申请日：1981-03-09
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MATSUDA YASUMASA , MUKUMOTO KYOJI , SAGAE SYOJI , KASAHARA MASATOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/12 , B41J2/205 , G06K15/10 , B41J3/04
摘要： A liquid droplet projection apparatus is disclosed which comprises a nozzle arranged at a liquid droplet ejection head, a liquid droplet supply tank, and an electro-mechanical transducer section interposed on the head between the nozzle and the tank. The volume of the electro-mechanical converter means changes in volume in response to an electrical signal pulse applied thereto to cause the nozzle to eject liquid droplets in accordance with the electrical signal. When the pattern of the electrical signal applied to the electromechanical transducer section has an interruption period longer than a predetermined width and three or more successive electrical signals following the interruption period, the amplitude and/or width of the second one of the successive electrical signals is enlarged as compared with the amplitude and/or width of the other electrical signals, thus preventing the diameter of the second liquid droplet ejected following the interruption from being reduced.

2. 发明专利

JPS6339430B2 失效
公开(公告)号：JPS6339430B2
公开(公告)日：1988-08-04
申请号：JP2917780
申请日：1980-03-10
申请人： HITACHI SEISAKUSHO KK , HITACHI KOKI KK
发明人： MATSUDA YASUMASA , MUKUMOTO KYOJI , SAKAE MASAJI , KASAHARA MASATOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/12 , B41J2/205 , G06K15/10

3. 发明专利

JPS61263760A INK JET PRINTER 失效
公开(公告)号：JPS61263760A
公开(公告)日：1986-11-21
申请号：JP10653485
申请日：1985-05-17
申请人： HITACHI KOKI KK
发明人： MUKUMOTO KYOJI , TOKUNAGA KAZUMI
IPC分类号： B41J2/01 , B41J2/045 , B41J2/055 , B41J2/21
摘要： PURPOSE:To enable two or more electrostrictive elements to be driven by a same drive circuit to reduce the required number of the drivers, by shifting nozzle pitchs between the respective colors little by little to shift the timing of driving the nozzle. CONSTITUTION:A plurality of nozzles 3 divided into (l) blocks, when nozzles of (m) number adjacent with each other are defined as one block, are aligned at angle theta to the direction in which the nozzles 3 move. When the pitch PN of the nozzle 3 has the horizontal component PNX and the vertical component PNNY and the dot to be printed has the horizontal component Px and the vertical component Py, they are so set as to meet the relations of PNX=nPx and PNy=Py. When the number (m) of the nozzles 3 is set 2, the vertical pitch Py has a relation Py=nPx tantheta between the nozzles for the same color, and Py=(n+1/4)Px tantheta between the nozzles for different colors, which induces discrepancy. But, this discrepancy reduces to a nearly inconsiderable amount by a method wherein; the large value is set for (n), results in theta of a small value, i.e., tantheta of a small value. It is needless to say that the value (n+p/l)Px can be applied to the vertical component in the pitch between different colors. (l, P are integers)

4. 发明专利

JPS6215415A DETECTOR FOR INK LEVEL 失效
公开(公告)号：JPS6215415A
公开(公告)日：1987-01-23
申请号：JP15496185
申请日：1985-07-12
申请人： HITACHI KOKI KK
发明人： MUKUMOTO KYOJI , OSHIMA MINORU
IPC分类号： B41J2/175 , G01F23/24
摘要： PURPOSE:To measure an ink level accurately irrespective of a temperature variation by correcting a value of detection resistance or a value of the reference voltage in accordance with the temperature variation of ink in detecting the ink level electrically. CONSTITUTION:A couple of electrodes 2 and 20 are provided at the bottom of an ink tank 1 storing the ink 3 and a driver 4 is connected with the electrode 2 at one side of them and impressed with the constant voltage. Then, the detection resistance 5 is connected with the electrode 20 at the other side and the detection voltage is compared with the reference voltage with a detection circuit 6 to measure the ink level. At that time, a resistance value of the detection resistance 5 is corrected in accordance with the temperature of the ink 3 using a thermistor 53 or the like. Further, the correction can be performed at the side of the reference voltage V. In this manner, the ink level can be detected accurately even if the resistance value of the ink 3 varies in accordance with the temperature variation.

5. 发明专利

JPS61106259A Ink droplet jet discharging device 失效
标题翻译： INK DROPLET喷射装置
公开(公告)号：JPS61106259A
公开(公告)日：1986-05-24
申请号：JP22776784
申请日：1984-10-31
申请人： Hitachi Koki Co Ltd , Hitachi Ltd
发明人： KUWABARA TEIJI , MATSUDA YASUMASA , MUKUMOTO KYOJI , TOKUNAGA KAZUMI , KASAHARA MASATOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/105 , B41J2/14
CPC分类号： B41J2/105 , B41J2/14233 , B41J2002/14338 , B41J2002/14379
摘要： PURPOSE: To realize a stabilized ink droplet jet discharge by controlling pressure variation within an ink chamber with a primary and a secondary pressure generating means, and at the same time by providing a tertiary pressure generating means to supply ink.
CONSTITUTION: A flute 11a formed on a silicone plate 11 by alkaline etching is divided into three areas by narrow portions 11b and 11c. By electrostatic bonding of a glass sheet 12 to the above silicone plate 11 three ink chambers 13a, 13b and 13c that are communicating in series are formed. The head of the ink chamber 13b communicates with a nozzle 14, and the tail of the ink chamber 13b communicates with an ink supply pipe 16 through a joint 15. Outside of the silicone plate 11 electromechanical transducers 17a, 17b and 17c which bend the silicone plate 11 to respectively reduce the capacities of the ink chambers 13a, 13b and 13c are bonded. Piezoelectric elements are used for the electromechanical transducers 17a, 17b and 17c, and driving pulse voltage Pa, Pb and Pc is applied to these electromechanical transducers 17a, 17b and 17c to discharge one ink droplet.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过利用初级和次级压力产生装置控制墨水室内的压力变化，同时通过提供供应墨水的三次压力产生装置来实现稳定的墨滴喷射放电。构成：通过碱蚀刻形成在硅树脂板11上的槽11a通过窄部分11b和11c分成三个区域。通过将玻璃板12静电接合到上述硅树脂板11上，形成串联连接的三个墨室13a，13b，13c。墨水室13b的头部与喷嘴14连通，并且墨水室13b的尾部通过接头15与供墨管16连通。在硅树脂板11的外部，使硅树脂弯曲的机电换能器17a，17b和17c 分别降低墨室13a，13b和13c的容量的板11。压电元件用于机电换能器17a，17b和17c，并且驱动脉冲电压Pa，Pb和Pc被施加到这些机电换能器17a，17b和17c以排出一个墨滴。

6. 发明专利

JPS61114854A Ink droplet injection device 失效
标题翻译：墨水注射装置
公开(公告)号：JPS61114854A
公开(公告)日：1986-06-02
申请号：JP23500684
申请日：1984-11-09
申请人： Hitachi Koki Co Ltd , Hitachi Ltd
发明人： KUWABARA TEIJI , MATSUDA YASUMASA , MUKUMOTO KYOJI , TOKUNAGA KAZUMI , KASAHARA MASATOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/14
CPC分类号： B41J2/14233 , B41J2002/14338 , B41J2002/14379
摘要： PURPOSE:To improve an ink droplet injection frequency to a great extent by applying pressure through the reduction of a volume and decreasing pressure through the increase of a volume using two different ink chambers. CONSTITUTION:A voltage is applied to an electric machine conversion element 13a and the volume of an ink chamber 11a reduced. At that time, a voltage is applied to the electric machine conversion element 13b, resulting in the rapid shrinkage of the ink chamber 11a. This causes the pressure of the ink chamber 11b and subsequently ink droplets to be injected through a nozzle 12. After the elapse of a fixed time following the application of pressure, a negative pressure must be generated in the nozzle 12 by decreasing the pressure of the ink chamber. To perform this pressure reduction in the ink chamber 11a, the voltage of the electric machine conversion element 13a should be eliminated. Next, the pressure is applied by the ink chamber 11a and the pressure is reduced by the ink chamber 11b.
摘要翻译：目的：通过使用两个不同的墨水室通过增加体积来减小体积和减小压力，通过施加压力来大大提高墨滴喷射频率。构成：将电压施加到电机转换元件13a，并且墨室11a的容积减小。此时，对电机转换元件13b施加电压，导致墨水室11a的收缩。这就导致墨水室11b的压力和随后的墨滴通过喷嘴12喷射。在施加压力之后经过一段固定的时间后，必须通过降低喷嘴12的压力来产生负压墨水室。为了在墨水室11a中进行这种压力降低，应该消除电机转换元件13a的电压。接下来，通过墨室11a施加压力，并且通过墨室11b降低压力。

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