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1. 发明专利

JPS57109687A INK CIRCULATING DEVICE FOR INK JET PRINTER 失效
公开(公告)号：JPS57109687A
公开(公告)日：1982-07-08
申请号：JP18747580
申请日：1980-12-26
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIGEI MASAHIRO , TAKEI GOROU , TSURUTA KEIICHI , KOBAYASHI MASATO , TAKAHASHI TAKAO
IPC分类号： B41J2/175
摘要： PURPOSE:To obtain an ink circulating device for ink jet printers using a single ink pump and hence having a reduced size by a construction wherein a retainer integrally attached to a plunger adapted to operate a diaphragm for a recovery pressure chamber is arranged to push a diaphragm for a supply pressure chamber via a piston. CONSTITUTION:When a current passes through a magnet coil 41, plunger 40 is attracted and then a diaphragm 33 causes ink within a recovery pressure chamber 26 to be pressurized. Subsequently, a suction check valve 29 is closed and a discharge check valve 30 is opened, so that the ink within the recovery pressure chamber 26 is fed into a subtank 46. Meanwhile, a retainer 36 integral with the plunger 40 pushes a piston 37 and hence a diaphragm 34 integral with the piston 37 causes ink within a supply pressure chamber 27 to be pressurized. Thereby, a suction check valve 31 is closed and a discharge check valve 32 is opened, so that the uniformly pressurized ink is fed into an air chamber 49. The diaphragm 33 has a pressurizing area larger than the diaphragm 34.

2. 发明专利

JPS5670963A INK PUMP FOR MULTIPLE COLOR INKS OF INK JET PRINTER 失效
公开(公告)号：JPS5670963A
公开(公告)日：1981-06-13
申请号：JP14775079
申请日：1979-11-16
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIGEI MASAHIRO , TSURUTA KEIICHI , KOBAYASHI MASATO , TOIDA TOORU
IPC分类号： B41J2/21 , B41J2/175
摘要： PURPOSE:To operate a plurality of ink pumps corresponding to the number of colors of the inks by a single motor and reduce the production cost of the printer by a method wherein the pumps are engaged with eccentric cams capable of being rotated by the single motor and are driven sequentially. CONSTITUTION:The plural eccentric cams 23a, 23b having a 90 deg. phase shift therebetween are fitted to a cam shaft 22 driven by the single motor 21 through a speed- changing means 20. Pistons 28-31 of the plural ink pumps 24-27 are faced to the eccentric cams 23a, 23b in a alternately staggered manner. In the pump 24, ink is pressurized by the elastic force of a spring 38, a check valve 33 is closed and a check valve 34 is opened to deliver the ink into an air chamber. In the pump 25, a piston 29 is retracted, followed by the inflow of the ink. At this time, each of the other pumps 26 and 27 is conducting an intermediate operation between the pressurizing of ink and the suction of ink.

3. 发明专利

JPS60112454A INK JET RECORDING DEVICE 失效
公开(公告)号：JPS60112454A
公开(公告)日：1985-06-18
申请号：JP22069783
申请日：1983-11-25
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MAKINO MASAYUKI , YOSHIDA KAZUYOSHI , TSURUTA KEIICHI , KOBAYASHI MASATO , NISHIMURA TAKASHI
IPC分类号： B41J2/115
摘要： PURPOSE:To arrange so that an optimal threshold value corresponding to a phase detection output may be selected and a change in the output be met by providing a circuit to change a threshold value of a comparator for phase detection in accordance with the condition of detection output. CONSTITUTION:When a phase detection output of a row of ink droplets from an input end 34 is detected by a comparator 27, first a switch 32, 33 is put in ''OFF'' position and a threshold value is set at a maximum V1 by a resistance 28, 29. Then said value is compared by the comparator 27. If the threshold value was detected, it is the highest against a noise, indicating a satisfactory phase detection. On the contrary, if said value was not detected, the switch 32 shall be put in ''ON'' position, so that the threshold value voltage is equivalent to V2

4. 发明专利

JPS57173167A INK JET RECORDER 失效
公开(公告)号：JPS57173167A
公开(公告)日：1982-10-25
申请号：JP4197381
申请日：1981-03-23
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MAKINO MASAYUKI , OBARA KAZUKI , TSURUTA KEIICHI , KOBAYASHI MASATO , WADA TAKEO
IPC分类号： B41J2/12 , B41J2/125 , G06K15/10
摘要： PURPOSE:To conduct printing with severe accuracy by detecting the velocity of flow of an ink-drop row from the time interval of the output pulses of an image sensor, changing supply pressure and keeping the pressure at reference value. CONSTITUTION:Ink from a supply pump 17 is injected from a nozzle 1 as the regular ink-drop row 9 through the vibration of a piezo-electric vibrator 2, and projected onto the image sensor 10 by the beams of a light emitting element 11. On the other hand, the sensor 10 synchronizes with clock pulses a by the sample pulses b of a printing control circuit 12, and outputs pulses c indicating the condition of the drop row 9 to a counter 13, an AND gate 19 opened just after the pulses b are generated and the circuit 12. A reference time generating circuit 14 outputs the pulses e of reference time width by the first output of the pulses c, a flip-flop 15 is set by the first pulses of the pulses c and reset by the output of the counter 13 counting only by fixed number, difference between the output pulses d, e is converted into voltage by a time difference comparison circuit 16, and the supply pressure of the pump 17 is changed by the voltage.

5. 发明专利

JPS57109686A INK CIRCULATOR FOR INK JET PRINTER 失效
公开(公告)号：JPS57109686A
公开(公告)日：1982-07-08
申请号：JP18747480
申请日：1980-12-26
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： SHIGEI MASAHIRO , TAKEI GOROU , TSURUTA KEIICHI , KOBAYASHI MASATO , TAKAHASHI TAKAO
IPC分类号： B41J2/175 , F04B17/04
摘要： PURPOSE:To provide an ink circulator of supply and recovery of ink in which the proportion of the space occupied by a pump is small and which can be constructed in small size by actuating with a plunger diaphragms installed respectively in a pressurizing chamber for recovery and a pressurizing chamber for supply. CONSTITUTION:A plunger 41 is attracted when electric current flows through a magnet coil 42. Then diaphragm 33 applies pressure to the ink in a pressurizing chamber 26 for recovery, and a suction check valve 29 closes and a discharge check valve 30 opens to supply ink in the pressurizing chamber 26 for recovery into a sub-tank 47. On the other hand, a piston 37 is pushed through a spring 39, and the diaphragm 34 applies pressure to the ink in a pressurzing chamber 27 for supply to close a suction check valve 31 and open a discharge check valve 32. With this arrangement ink pressurized to a certain is sent from the pressurized chamber 27 for supply to an air chamber 50. The diaphragm 33 has an area larger than the diaphragm 34.

6. 发明专利

JPS57107854A MULTIPLE INK JET RECORDING DEVICE 失效
公开(公告)号：JPS57107854A
公开(公告)日：1982-07-05
申请号：JP18460980
申请日：1980-12-25
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OBARA KAZUKI , TSURUTA KEIICHI , MAKINO MASAYUKI , KOBAYASHI MASATO , OKAZAKI TETSUO
IPC分类号： B41J2/08 , B41J2/075 , B41J2/13
摘要： PURPOSE:To perform high speed recording with high quality by delaying the charge timing of each of a plurality of ink drop lines, and performing control so that the ink drop in the neighboring ink drop lines is always thinned out with respect to the ink drops for recording. CONSTITUTION:A nozzle 3, a piezoelectric transducer 4, a charging electrode 5, deflecting electrodes 6 and 7, and gutter 10 are inclined by an angle theta with respect to the feeding direction of the nozzle 3 (the direction of an arrow). The charging is controlled by a binary value. The ink drop line g of a plurality of the ink drop lines a-g is charged at first. The timing of the charge for upper ink drop lines is delayed than the lower lines. One ink drop is delayed for every one line. With respect to the ink drop which gives data in each ink drop line, thinned-out drop is located in the adjacent ink drop line. Since the effect of the ink drop on both sides of the printing ink drops are always balanced, the printing ink drop continues stable flying, and the printing of excellent quality can be performed.

7. 发明专利

JPS60112452A INK JET RECORDING DEVICE 失效
公开(公告)号：JPS60112452A
公开(公告)日：1985-06-18
申请号：JP22069583
申请日：1983-11-25
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OBARA KAZUKI , TSURUTA KEIICHI , MAKINO MASAYUKI , KOBAYASHI MASATO , TAKAHASHI TAKAO
IPC分类号： B41J2/085 , B41J2/09 , B41J2/13 , B41J2/21
摘要： PURPOSE:To enable high-speed printing to be performed under a simple structure by making a plurarity of nozzle carry out print work in each backward and forward part of action trip and providing an inclination opposite to a chaser-shaped deflection electrode to eliminate a print tilt and sharing an electric charge control part. CONSTITUTION:If data equivalent to four different colors are inputted to an input part 21, first data equivalent to two different colors are inputted to a simple-line buffer memory 231, 232 to store characters in a register 241, 242 one by one starting with a character at the head of a line. Thus an address of a character ROM261, 262 is designated. In addition, a printing direction designating part 22 designates the input of characters at the head of a line in a memory 231, 232 and at the same time, designates a ''forward'' on a feed control part 29. The part 22 also actuates a column counter 25 and designates a column for a character ROM261, 262 to carry out a two-color printing in a ''forward'' direction through a shift register 271, 272 and an electric charging circuit 281, 282. Next, in the same manner, the remaining two-color data are input for two- color printing in a ''backward'' direction at a designation issued by the printing direction designating part 22. Thus it is not necessary to have circuits for all required color assortments provided and is possible to perform high-speed printing at low cost.

8. 发明专利

JPS57107853A MULTIPLE INK JET RECORDING DEVICE 失效
公开(公告)号：JPS57107853A
公开(公告)日：1982-07-05
申请号：JP18460880
申请日：1980-12-25
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： OBARA KAZUKI , TSURUTA KEIICHI , TAKEI GOROU , KOBAYASHI MASATO , TANAKA TOMOAKI
IPC分类号： B41J2/075 , B41J2/15
摘要： PURPOSE:To perform high speed recording with high quality without the difference in arriving times on recording paper, by providing a plurality of supply holes at the opposite positions with respect to jetting holes at both ends in the line direction, and supplying ink to an ink chamber from said supply holes. CONSTITUTION:The ink is supplied to the ink chamber 31 in a nozzle 3 from the supply holes 33a and 33b at both ends by using two ink pipes 2a and 2b from an ink supply system 1. Of a plurality of the jet holes 32a-32e, the jet holes 32a and 32e at both ends of the line direction are close to the supply holes 33a and 33b, and the external hole ends of the supply holes 33a and 33b are contacted with the wall surface of the ink chamber 31. Therefore a layered stream is formed on the wall surface of the ink chamber 31, and turbulent streams are formed in the vicinity of the center of the ink chamber 31. The speed distribution of the ink jet streams at the jet holes 32a-32e is such that the speed on both sides is faster than that in the center. However, the speed of the ink drops at both ends becomes slower due to the resistance of the air during flight, and the ink arrives at the recording paper 11 at an approximately equal speed as a whole. Therefore, the excellent printing quality can be obtained even though head feeding is performed at a high speed.

9. 发明专利

JPS5670973A INK JET RECORDER 失效
公开(公告)号：JPS5670973A
公开(公告)日：1981-06-13
申请号：JP14773179
申请日：1979-11-16
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MAKINO MASAYUKI , OBARA KAZUKI , TSURUTA KEIICHI , KOBAYASHI MASATO , TOIDA TOORU
IPC分类号： B41J2/12 , G06K15/10
摘要： PURPOSE:To provide the titled recorder which is capable of printing in a constant size irrespectively of the flow velocity of ink and is suitable for a jet printing device requiring a strict printing precision, by a method wherein a single charge detector and a circuit for feeding back the detected results so as to maintain a fixed defelction amount are provided. CONSTITUTION:The detector 11 for detecting the charges of ink droplets and the circuit (comprising a counter 19 which generates character rows, a digital-to-analog converter 20 of the constant-current output type, a counter 21 which generates compensation voltages, a digital-to-analog converter 22 and a variable resistor 23 having a resistance varied by the compensation voltages) for compensating for the changes in the deflection amount. If the variable resistor 23 is set to have a smaller resistance as a control voltage becomes lower, the output of the D/A converter 22 is changed, a test pulse is impressed on a charging electrode through a charging circuit 25 so as to charge the ink droplets, which are then deflected by deflecting electrodes and the output of the detector 11 is memorized. The distance between the ink droplet and the electrode 15 of the detector 11 is minimum when the output of the detector 11 is maximum. Accordingly, a fixed deflection amount can always be obtained by adjusting the deflection amount to the position of the detector 11.

10. 发明专利

JPS5670972A INK JET RECORDER 失效
公开(公告)号：JPS5670972A
公开(公告)日：1981-06-13
申请号：JP14773079
申请日：1979-11-16
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MAKINO MASAYUKI , TAKEI GOROU , TSURUTA KEIICHI , KOBAYASHI MASATO , TOIDA TOORU
IPC分类号： B41J2/115 , G06K15/10
摘要： PURPOSE:To provide the titled recorder which allows miniaturization of a head section, reduction in wiring and reduction in the number of phase-detecting circuits by a method wherein the phase detection for each of a plurality of nozzles is sequentially performed by use of a single phase detector. CONSTITUTION:The phase detector 11 is used in common, and whether ink droplets are charged or not is detected by detecting the voltages cross resistors between electrodes 15 and a shield tube 14. When a phase detection starting pulse is inputted through a terminal 31 to operate a timer 33, a phase pulse selected at a phase selector 38 is fed through a circuit 40 into one of circuits 41-43 concerned with the nozzle selected at a nozzle decoder 39, thereby causing one of charging circuits 441- 443 to operate. Phase detection pulses appear at a terminal 45 and are sampled at a circuit 46 by use of a sample strobe signal generated at a circuit 36. When there is a phase detection output, a value at a phase counter 34 indicating a favorable phase is stored in a RAM48 through a circuit 47.

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