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81. 发明专利

JPH01208147A INK JET RECORDING APPARATUS 失效
公开(公告)号：JPH01208147A
公开(公告)日：1989-08-22
申请号：JP3174188
申请日：1988-02-16
申请人： FUJI XEROX CO LTD
发明人： FUJIMURA YOSHIHIKO , SAITO KOICHI , KATO SEIICHI , INOUE NANAO , KOTAKE NAOSHI , NAITOU ZOUICHI , IKEDA HIROSHI
IPC分类号： B41J2/05 , B41J2/06 , B41J2/145
摘要： PURPOSE:To correspond to high speed and high density recording and to allow ink to normally fly, by a method wherein an energy applying means of each of groups is arranged so as to be inclined with respect to the direction crossing the moving direction of a recording sheet at a right angle and slits are respectively provided to one of substrates at the positions corresponding to the energy applying means in a divided state. CONSTITUTION:Since slits 3a, 3b... for allowing ink 2 to fly are formed in a plurality, each of the slits 3a, 3b... may be short and can be formed precisely. Therefore, a long head main body 4 can be easily formed and the ink 2 can be allowed to normally fly in a predetermined direction. Since energy applying means 6 are divided into a large number of groups and inclined at an angle thetawith respect to the direction A of crossing the moving direction of a recording sheet 5 at a right angle, recording density d2 can be enhanced by the cos thetaof the arrangement density P of the energy applying means 6 with respect to the arrangement density P of heat generating resistors 12 as the energy applying means 6.

82. 发明专利

JPS6461256A INK JET RECORDING 失效
公开(公告)号：JPS6461256A
公开(公告)日：1989-03-08
申请号：JP21793087
申请日：1987-09-02
申请人： FUJI XEROX CO LTD
发明人： SAITO KOICHI , FUJIMURA YOSHIHIKO , KATO SEIICHI , INOUE NANAO , NAITO KOICHI , KOTAKE NAOSHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/06
摘要： PURPOSE:To effectively prevent an upheaval accumulation phenomenon of ink generated under the uniformization effect of an electrostatic field in a high-speed printing cycle, and make the upheaval of ink uniform in an optimum state by reducing the electrostatic field stepwise following the progress of a continuous printing cycle. CONSTITUTION:When a switching element 24 is turned ON/OFF in accordance with a signal which complies with image information, a heat signal A is applied to ink 3 from a corresponding thermal resistor 21. At the same time, an electrostatic signal S which forms an electrostatic field is applied to the ink 3, synchronously with the heat signal A. At that time, a voltage value of a variable high voltage supply 33 is reduced by 10V per printing cycle of 100 lines by means of an electrostatic control means 7. Therefore, the electromagnetic signal S is reduced stepwise per printing cycle of 100 lines, and then is applied to the ink 3. For this reason, when the electrostatic signal S is uniform, the attractive force brought to bear on an ink column 3a in an upheaval direction becomes weak by the stepwise reduction value of intensity of the electrostatic signal S. Subsequently, the upheaval of the rising ink column 3a is maintained almost at a constant level.

83. 发明专利

JPS6461255A INK JET RECORDING METHOD 失效
公开(公告)号：JPS6461255A
公开(公告)日：1989-03-08
申请号：JP21792987
申请日：1987-09-02
申请人： FUJI XEROX CO LTD
发明人： SAITO KOICHI , FUJIMURA YOSHIHIKO , KATO SEIICHI , INOUE NANAO , NAITO KOICHI , KOTAKE NAOSHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/06
摘要： PURPOSE:To accelerate the return speed of an ink column when the rising ink column returns to a recording sheet side based on the synergic action of a heat signal and an electrostatic field in accordance with image information by applying a prearranged auxiliary heat signal to each ink part at an intermediate point of time of each application timing for a heat signal in compliance with image information. CONSTITUTION:An ink jet recording device is composed of a main body of ink jet head 1, a means 4 to apply a heat signal to ink 3 stored in an ink ejection part 2a of a slit-like ink chamber 2 by unit of pixel density, a means 5 to apply an auxiliary heat signal to ink 3 in the ink discharge part 2a by unit of pixel density at an intermediate point of time of each application timing for a heat signal of a heat signal application means 4, and a means 6 to allow formation of a prearranged electrostatic field between the surface of ink 3 and recording sheet 7, synchronously with an application timing for the heat signal of the heat signal application means 4. The heat signal application means 4 and the auxiliary heat signal application means 5 are composed of a heat generating element array adjusted to pixel density and a control circuit 30 which thermally drives the array by subdividing it into four blocks and also thermally drives said array at auxiliary heating timing.

84. 发明专利

JPS6426458A INK JET RECORDER 失效
公开(公告)号：JPS6426458A
公开(公告)日：1989-01-27
申请号：JP18238287
申请日：1987-07-23
申请人： FUJI XEROX CO LTD
发明人： KATO SEIICHI , SAITO KOICHI , FUJIMURA YOSHIHIKO , INOUE NANAO , KOTAKE NAOSHI , NAITO KOICHI , HORIE KIYOSHI
IPC分类号： B41J2/06 , B41J2/05 , B41J2/14
摘要： PURPOSE:To enable a high-speed recording action, by a method wherein a recessed part is formed on an opposed surface of at least one insulating substrate, and in a slit-form space a gap of an ink holding part connecting to an ink discharge part is made larger in dimension than a gap on the side of the ink discharge part. CONSTITUTION:When a drive pulse according to image information is applied to a heating resistor 13 of a thermal energy applying means 4, an ink 3 is subjected to a thermal energy to be heated. Then, viscosity and surface tension are reduced and conductivity is enhanced. On the other hand, with the application of an electrostatic control pulse to an electrostatic inducing electrode 19, an electrostatic field is formed between the electrode 19 and the surface of the ink 3, whereby the heated ink 3 jets towards a recording sheet 5 to form an ink dot. At this time, a recessed part 9 is formed on an upper insulating substrate 7, and a gap of an ink holding part 12 connecting to an ink discharge part 11 is made larger in dimension than an gap on the side of the ink discharge part 11. In this manner, the resistance in a flow path can be reduced. Thus, the ink 3 is stably supplied, and recording action can be speeded up.

85. 发明专利

JPS6426457A INK JET RECORDER 失效
公开(公告)号：JPS6426457A
公开(公告)日：1989-01-27
申请号：JP18238187
申请日：1987-07-23
申请人： FUJI XEROX CO LTD
发明人： KATO SEIICHI , SAITO KOICHI , FUJIMURA YOSHIHIKO , INOUE NANAO , KOTAKE NAOSHI , NAITO KOICHI , HORIE KIYOSHI
IPC分类号： B41J2/06 , B41J2/05 , B41J2/14
摘要： PURPOSE:To enable a high-speed recording action, by a method wherein one insulating substrate is inclinedly disposed close to the other towards the tip ends thereof, and a gap of an ink holding part connecting to an ink discharge part is made larger in dimension than a gap on the side of the ink discharge part. CONSTITUTION:When a drive pulse according to image information is applied to a heating resistor 15 of a thermal energy applying means 4, an ink 3 is subjected to a thermal energy to be heated. Then, viscosity and surface tension are reduced and conductivity is enhanced. On the other hand, with the application of an electrostatic control pulse to an electrostatic inducing electrode 21, an electrostatic field is formed between the electrode 21 and the surface of the ink 3, whereby the ink 3 jets towards a recording sheet 5 to form an ink dot. At this time, a pair of insulating substrates 7, 8 are disposed opposedly and inclinedly close to each other towards the tip ends thereof, and in a slit- form space 1, a gap of an ink holding part 12 connecting to an ink discharge part 11 is made larger in dimension than a gap on the side of the ink discharge part 11. In this manner, the resistance in a flow path can be reduced. Thus, the ink 3 is stably supplied, and recording action can be speeded up.

86. 发明专利

JPS63136058A POWDER IMAGE RECORDER 失效
公开(公告)号：JPS63136058A
公开(公告)日：1988-06-08
申请号：JP28375486
申请日：1986-11-28
申请人： FUJI XEROX CO LTD
发明人： FUJIMURA YOSHIHIKO , SAITO KOICHI , AKUTSU HIDEKAZU , INOUE NANAO
IPC分类号： B41J2/385 , G03G15/00 , G03G15/05
摘要： PURPOSE:To enable high-density recording and halftone recording according to density information on image information by providing a means which varies and controls either or both of the value of a voltage applied to a control electrode and the application time of the voltage according to the density information on the image information. CONSTITUTION:The amount of toner in reciprocal motion depends upon the supply amount of toner on a toner carrier 1, so it is difficult to control picture elements at every picture element and it does not suit to image density control, but when flying speed can be controlled by the intensity of an electric field operating between the control electrode 9 and a toner carrier 1, i.e. the level of the voltage applied to the control electrode 9, the time of the reciprocal motion can be controlled by the pulse width of the pulse voltage applied to the control electrode 9, so image density is controllable by controlling the level and pulse width of the pulse voltage applied to the control electrode 9. The density of printing dots can be controlled according to the density information on the image information by controlling either or both of the voltage value and the application time of the voltage applied to the control electrode 9. Consequently, high-density recording and halftone recording are both enabled.

87. 发明专利

JPS63134251A INK JET RECORDER 失效
公开(公告)号：JPS63134251A
公开(公告)日：1988-06-06
申请号：JP28057986
申请日：1986-11-27
申请人： FUJI XEROX CO LTD
发明人： INOUE NANAO , SAITO KOICHI , KATO YOSHITAKE , FUJIMAGARI KEIJI , FUJIMURA YOSHIHIKO , KATO SEIICHI , NAITO KOICHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/06 , B41J2/14
摘要： PURPOSE:To contrive enhancement of the density of recorded images, by a construction wherein of energizing electrodes for a pair of adjacent heat generating electrodes, those on the adjacent side are composed of a single common electrode. CONSTITUTION:A thermal energy applying means 3 comprises a plurality of heat generating resistors 8 provided near an aperture edge on one side of a slit form space part 1, and pairs of energizing electrodes 9 provided one pair for each of the resistors 8 so as to selectively energize the resistors 8. Of the energizing electrodes 9 for each pair of adjacent heat generating resistors 8, those on the adjacent side are composed of a single common electrode 10. As a result, the number of the energizing electrodes is reduced, whereby the density of the electrodes can be reduced, and a switching circuit 18 can be simplified. Accordingly, it is possible to reduce the pitch of arrangement of the heat generating resistors 8 and to contrive an increase in the density of recorded images.

88. 发明专利

JPS6357248A INK JET RECORDER 失效
公开(公告)号：JPS6357248A
公开(公告)日：1988-03-11
申请号：JP20177886
申请日：1986-08-29
申请人： FUJI XEROX CO LTD
发明人： SAITO KOICHI , FUJIMURA YOSHIHIKO , INOUE NANAO , KATO SEIICHI , NAITO KOICHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/06
摘要： PURPOSE:To permit high-density and high-speed recording by a method in which a heater is provided near an opening through which ink is flown, and the ink is turned fliable by lowering the surface tension and viscosity of ink. CONSTITUTION:A heater 7 provided near a slit opening 5 is made of a heating resistor 20 of Ta-ZrO2 provided on the inner surface of other glass base plate 12. As the heating resistor 20, ones having a resistance value capable of controlling temperature of ink by a power controller, such as ceramic heater, plastic film heater, etc., having practically controllable heating width of about 1mm for example, may be cited. The ink 3 used includes conductive inks having temperature dependence characteristics by which viscosity and surface tension lower as temperature rises and adequate volume resistivity, such as oily and aqueous ones. The heater 7 may have a heating region enough to heat flying ink alone, not to heat all ink packed in an ink chamber 2.

89. 发明专利

JPS6341151A INK JET RECORDING APPARATUS 失效
公开(公告)号：JPS6341151A
公开(公告)日：1988-02-22
申请号：JP18336586
申请日：1986-08-06
申请人： FUJI XEROX CO LTD
发明人： NAITO KOICHI , SAITO KOICHI , FUJIMURA YOSHIHIKO , INOUE NANAO , KATO SEIICHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/015 , B41J2/14
摘要： PURPOSE:To keep the image quality of a recording image well at a low energy level, by providing heat generating parts arranged corresponding to a picture element density on a heat signal applying means and bringing the dimension of each heat generating part extending along in the direction crossing the arrangement direction of the heat generating parts at a right angle to specific relation with respect to the center-to-center distance of the heat generating parts. CONSTITUTION:For example, the distance alpha between the end part of each of heat generating resistors 21 and the end part of a head main body 1 is set to 50mum, the center-to-center distance lambda of the heat generating resistors 21 is set to 125mum and the width dimension deltaof each heat generating resistor 21 is set to 80mum and, further, the dimension l of each heat generating resistor 21 extending along in the direction crossing the arrangement direction of the heat generating resistors 21 at a right angle is appropriately set within 2lambda. The contrast of the surface temp. distribution of ink 3 along the longitudinal direction of a slit opening part 2a becomes large as the dimension l becomes small and position shift between an ink heating region and an ink flight region is scarcely eliminated and a high quality recording image is obtained. When the dimension l becomes equal to 2lambda, positional shift begins to generate slightly. Further, as the dimension l becomes small, the application quantity of energy can be suppressed to a small amount.

90. 发明专利

JPS6341150A INK JET RECORDING METHOD 失效
公开(公告)号：JPS6341150A
公开(公告)日：1988-02-22
申请号：JP18336486
申请日：1986-08-06
申请人： FUJI XEROX CO LTD
发明人： NAITO KOICHI , SAITO KOICHI , FUJIMURA YOSHIHIKO , INOUE NANAO , KATO SEIICHI , HORIE KIYOSHI
IPC分类号： B41J2/05 , B41J2/06 , B41J2/07 , B41J2/075
摘要： PURPOSE:To reduce supply energy to ink and to shorten a recording operation time, by applying a heat signal to the ink and further applying an electrostatic signal to the ink in such a stage that the ink reaches a critical flight state and simultaneously finishing both applying operations. CONSTITUTION:When an image information signal G is inputted to a control means 7, the control means 7 allows each switching element 23 of a heat signal applying means 4 to take ON-operation only for a time T1. A heat generating resistor 21 generates heat and a heat signal M is applied to an ink unit area A. After the elapse of a predetermined time T3, the corresponding ink unit area A reaches a critical flight state. At this point of time, the control means 7 allows the switching element 33 of an electrostatic field forming means 6 to take ON-operation only for a time T2 and an electrostatic signal N is applied to the entire surface area of ink to immediately form a predetermined electrostatic field S. The ink unit area A begins to fly by attraction force based on the electrostatic field S and the leading end part of a protruded ink column 3a is contacted with a recording sheet 5 to be transferred to said sheet 5 to form an ink dot D. In such a stage that the flight operation of the ink 3 is finished, the operations for applying the heat signal M and the electrostatic signal N are finished.

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