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1. 发明专利

JP2001162789A INK JET RECORDER 失效
公开(公告)号：JP2001162789A
公开(公告)日：2001-06-19
申请号：JP35027499
申请日：1999-12-09
申请人： RICOH KK
发明人： KIMURA TAKASHI , KATO TOMOKI
IPC分类号： B41J2/045 , B41J2/055
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable ink jet recorder in which a high image quality can be obtained by realizing reduction of crosstalk at low cost. SOLUTION: The ink jet recorder comprises electrodes 29 being connected with a common electrode and electrodes 28 being connected with a substrate arranged and connected on the same printed wiring board.

2. 发明专利

JPH11170509A INK-JET HEAD 失效
公开(公告)号：JPH11170509A
公开(公告)日：1999-06-29
申请号：JP36417397
申请日：1997-12-16
申请人： RICOH KK
发明人： KATO TOMOKI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/14
摘要： PROBLEM TO BE SOLVED: To discharge ink efficiently and realize a highly integrated, high- density ink-jet head by effectively utilizing a large displacement at a minute gap region where a restoring force is smaller than an electrostatic force. SOLUTION: A diaphragm 3 is formed at part of a liquid chamber 5 having a nozzle 6. A potential difference is brought about between a first electrode 1 set at the diaphragm 3 and a second electrode 2 opposed to the first electrode 1 via a minute gap GAP, thereby deforming the diaphragm 3 by an electrostatic force and discharging an ink drop 9 from the nozzle 6. When a voltage larger than a critical voltage whereat the electrostatic force is larger than a restoring force of the diaphragm 3 is impressed for a suitable time, a large displacement is given rise to the diaphragm 3 with the utilization of a minute gap region where the restoring force is smaller than the electrostatic force. Since ink drops of a sufficient large size can be discharged even when the liquid chamber 5 is made small, a high-density, highly integrated ink-jet head can be realized.

3. 发明专利

JPH11138794A LIQUID JET RECORDER 失效
公开(公告)号：JPH11138794A
公开(公告)日：1999-05-25
申请号：JP30467297
申请日：1997-11-06
申请人： RICOH KK
发明人： KATO TOMOKI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/14
摘要： PROBLEM TO BE SOLVED: To realize low voltage driving of an electrostatic ink jet recorder stably. SOLUTION: A part of the wall face constituting a liquid chamber 13 also serves as a diaphragm 14 which deforms to cause volume variation in the liquid chamber 13 thus jetting ink in the liquid chamber 13 through a nozzle 15. The diaphragm 14 is deformed by an electrostatic force acting between a first electrode 16 provided on the rear surface of the diaphragm 14 and a second electrode 18 spaced apart therefrom. A dielectric 20 is interposed between the first electrode 16 and the second electrode 18 and when a dielectric having a high permittivity ε is placed in the gap between the electrodes 18, 18, the driving voltage can be reduced without decreasing the length of the gap.

4. 发明专利

JPH09319190A ELECTRIFYING DEVICE 失效
公开(公告)号：JPH09319190A
公开(公告)日：1997-12-12
申请号：JP13793296
申请日：1996-05-31
申请人： RICOH KK , HAMAMATSU PHOTONICS KK
发明人： KATO TOMOKI , KADONAGA MASAFUMI , HIRANO MASAYUKI
IPC分类号： G03G15/02 , G03G15/00 , G03G21/06
摘要： PROBLEM TO BE SOLVED: To provide an electrifying device capable of improving reliability of electrification by preventing generation of ozone and uneven electrification. SOLUTION: In this electrifying device adopted for an image forming device obtaining the image by uniformly performing the initial electrification on a photoreceptor, forming the pattern of the electrostatic charge modulated correspondingly to the image signal while partially erasing the initial electrification, developing the pattern with use of toner, and transferring on recording paper directly or through an intermediate transfer body, the device is provided with an electromagnetic wave emitting device 42 for emitting the electromagnetic wave in a space vicinity of the photoreceptor, an air flow generating device 46 for generating the air flow in the space and an electric field forming means 45 forming the electric field in the space.

5. 发明专利

JPH09218562A ELECTROSTATIC CHARGING DEVICE 失效
公开(公告)号：JPH09218562A
公开(公告)日：1997-08-19
申请号：JP2269096
申请日：1996-02-08
申请人： RICOH KK , HAMAMATSU PHOTONICS KK
发明人： KATO TOMOKI , KADONAGA MASAFUMI , HIRANO MASAYUKI
IPC分类号： G03G15/02
摘要： PROBLEM TO BE SOLVED: To electrostatically charge a photoreceptor in non contact state, to improve the reliability in electrostatically charging and the efficiency in electrostatically charging, and also, to prevent the generation of ozone, by appropriately applying an electromagnetic wave and an electrical field. SOLUTION: The charger is constituted of an electromagnetic wave irradiation device 2, an electrode 1a on the rear side of the photoreceptor 1, a grid 3 as an intermediate electrode arranged between the photoreceptor 1 and the irradiation device 2, and a DC voltage power source 7, and the rear electrode 1a and the irradiation device 2 are grounded, and the voltage power source 7 is connected to the grid 3 so as to impress the negative voltage, then, an electrical field is formed in a space above the photoreceptor 1. In this case, by extending the grid 3 to the downstream side in the moving direction of the photoreceptor 1, the electrostatic charging width is increased, and also, the photoreceptor 1 in a state where the electrical field is not formed yet is prevented from coming into contact with ion with reverse polarity, so that the efficiency in electrostatically charging is improved. And also, by making the grid 3 larger than the electromagnetic wave irradiation hole 4 for the irradiation device 2, the efficiency in electrostatically charging is improved.

6. 发明专利

JPH0784436A IMAGE FORMING DEVICE AND ELECTRIFIER 失效
公开(公告)号：JPH0784436A
公开(公告)日：1995-03-31
申请号：JP23158693
申请日：1993-09-17
申请人： RICOH KK
发明人： TAKAHASHI TOMOKO , KATO TOMOKI , KADONAGA MASAFUMI
IPC分类号： G03G15/02
摘要： PURPOSE:To prevent the discharge between contact electrifying-members and a body which is electrified, to prevent ozone and noise and to efficiently carry out uniform electrification free of irregularities by means of a simple structure by applying to a plurality of contact electrifying-members a DC bias lower than a voltage at which discharge is initiated. CONSTITUTION:An electrifier 12 is arranged along the direction in which a photoreceptor 11 rotates, and has a plurality of blade-like contact electrifying- members 16-19 which are in contact with the photoreceptor 11. The same DC bias voltage is applied to each of the contact electrifying-members 16-19 from a power source 20. In the determination of the DC bias voltage for the application to the contact electrifying-members 16-19, the DC bias is determined based on the material of the electrifying-members 16-19 and the required electrification- potential of the body 11 which is electrified. Here, when the DC bias voltage is too high, with the result that the voltage of a gap between the contact members 16-19 and the body 11 exceeds the voltage at which the discharge is initiated, discharge is caused. Therefore, the DC bias lower than the voltage at which the discharge is initiated is applied.

7. 发明专利

JPH06313782A MEASURING DEVICE OF POTENTIAL 失效
公开(公告)号：JPH06313782A
公开(公告)日：1994-11-08
申请号：JP12755893
申请日：1993-05-28
申请人： RICOH KK
发明人： KADONAGA MASAFUMI , TAKAHASHI TOMOKO , KATO TOMOKI
IPC分类号： G01R19/00 , G01R29/12 , G03G15/00
摘要： PURPOSE:To enable the measurement of a surface potential of a minute area and to obtain the distribution of the surface potential of high resolution by putting a probe and a dummy electrode in continuity and by measuring a potential appearing in the dummy electrode on the occasion when the probe approaches a potential measuring surface. CONSTITUTION:An insulative substance 1a such as resin or ceramic is fixed to the fore end of a columnar measuring probe 1 and it is made to approach a potential measuring surface 2 vertically substantially. When the measuring surface 2 is charged with electricity, a potential corresponding to a surface potential of the measuring surface 2, a capacitance C1 between the measuring surface 2 and the probe 1 and a capacitance C2 constituted of a probe 5a and a dummy electrode 3 is generated in the dummy electrode 3. This is equivalent to that two capacitors C1 and C2 are connected in series, in other words, and when the capacitance C1 is large, the potential of the dummy electrode 3 becomes large and the accuracy of measurement of the surface potential of the measuring surface 2 by a surface electrometer 5 is improved. Since the insulative substance 1a is fixed to the fore end of the probe 1, besides, a discharge hardly occurs and thus the surface potential of a minute area can be measured.

8. 发明专利

JPH0658396A ROTATION TRANSMITTING AND DRIVING DEVICE 失效
公开(公告)号：JPH0658396A
公开(公告)日：1994-03-01
申请号：JP20764292
申请日：1992-08-04
申请人： RICOH KK
发明人： OKADA YASUYUKI , SHINGYOUCHI MITSURU , KIMURA TAKASHI , TAKEMOTO TAKESHI , KATO TOMOKI , ANDO SHUNICHI , OZAKI MOTOMI
IPC分类号： F16H13/12 , F16H61/00
摘要： PURPOSE:To provide a rotation transmitting and driving device which can improve the accuracy of rotation control, by predicting the rotation speed at the present or the next measuring point from the rotation speeds at the times of past two or more points. CONSTITUTION:This rotation transmitting and driving device is provided with an active rotor 2 driven by a motor 1, a passive rotor 4 the driving force of the active rotor 2 is transmitted, a motive power transmitter 3 to connect both the active rotor 2 and the passive rotor 4, and a detecting device (encoder) 5 to detect the rotating angle or the rotating speed of the passive rotor 4. This device is also provided with a passive rotor rotation control means (a control circuit 6) to predict the rotating angle or the rotating speed at the present time from plural rotating angles or rotating speeds of the passive rotor 4 detected by the detecting device 5, and to carry out the rotation control of the passive rotor 4 to the predicted value.

9. 发明专利

JPH05169794A RECORDING APPARATUS 失效
公开(公告)号：JPH05169794A
公开(公告)日：1993-07-09
申请号：JP35629291
申请日：1991-12-24
申请人： RICOH KK
发明人： TOMONO HIDENORI , KATANO YASUO , OYAMAGUCHI AKIRA , TAKEMOTO TAKESHI , OKADA YASUYUKI , KATO TOMOKI
IPC分类号： B41M5/00 , B41C1/00 , B41C1/055 , B41L19/00
摘要： PURPOSE:To prevent positional shift, in a multicolor recording apparatus, by arranging means applying and forming recording layers each lowered in its sweepback contact angle at the time of the contact with a liquid in a heating state, heating latent image forming means and developing means in the periphery of a support as two or more units and arranging a transfer means and a washing means on the downstream side of said units. CONSTITUTION:A controller 2a, a latent image forming means 3a and a developing means 4a are arranged along a support as one unit. In the same way, controllers 2b, 2c, latent image forming means 3b, 3c and developing means 4b, 4c are arranged as units. A recording layer 7a becoming low in its sweepback contact angle even after cooling at the time of the contact with a liquid in a heating state and becoming high in its sweepback contact angle in the absence of a liquid is formed by the controllers 2a-2c and developed through the latent image forming means 3a-3c and the developing means 4a-4c and the formed image is transferred by a transfer roller 5. After transfer, the support is cleaned by a cleaning blade 6.

10. 发明专利

JP2003089217A INK SUPPLY DEVICE AND INK JET RECORDER 审中-公开
公开(公告)号：JP2003089217A
公开(公告)日：2003-03-25
申请号：JP2001282663
申请日：2001-09-18
申请人： RICOH KK
发明人： KATO TOMOKI , NUKAYA YASUYUKI
IPC分类号： B41J2/175
摘要： PROBLEM TO BE SOLVED: To provide an ink supply device which can realize supplying ink with high reliability for a long time, is fit to a recorder capable of printing at high speed and is compact, and an ink jet recorder. SOLUTION: The ink supply device is used for an ink jet head for forming images by discharging ink, and has an ink container which is provided with at least an ink discharge opening and a negative pressure maintaining member and to which an ink cartridge for storing ink is detachably connected at a near position.

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