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1. 发明专利

JP2003172897A OPTICAL SCANNER AND ITS MANUFACTURING METHOD, OPTICAL WRITING DEVICE, IMAGE FORMING APPARATUS, VIBRATORY MIRROR CHIP AND ITS MANUFACTURING METHOD, AND OPTICAL SCANNING MODULE 审中-公开
公开(公告)号：JP2003172897A
公开(公告)日：2003-06-20
申请号：JP2002216250
申请日：2002-07-25
申请人： RICOH KK
发明人： SATO YUKITO , FUJII MITSUYOSHI
IPC分类号： B41J2/44 , B81B3/00 , G02B26/10
摘要： PROBLEM TO BE SOLVED: To enable an optical scanner, which vibrates a mirror substrate reciprocally on a beam as an axis of torsional rotation, to make an optical scan with a stable beam shape. SOLUTION: On the reverse surface of the mirror substrate 101 where a mirror surface 115 is not formed, a rib 121 for reinforcement is formed which extends at right angles to at least beams 102 and 103, and the remaining area is a thin etched area. The rib 21 for reinforcement is provided to effectively suppress deformation of the mirror substrate 101 in vibration and then the flatness of the mirror surface 115 is maintained, so the optical scan with the stable beam shape can be made. Various styles of the rib for reinforcement like a rib provided surrounding the external edge of the mirror substrate are disclosed. Further, such a style that the mirror substrate is composed of a thin film and a frame body is also disclosed. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2002292868A LIQUID DROP EJECTION HEAD, INK CARTRIDGE AND INK JET RECORDER 失效
公开(公告)号：JP2002292868A
公开(公告)日：2002-10-09
申请号：JP2001093574
申请日：2001-03-28
申请人： RICOH KK
发明人： HASHIMOTO KENICHIRO , FUJII MITSUYOSHI , KATO TOMOKI , MAKI TSUNEO , YAMAGUCHI KIYOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/135 , B41J2/14 , B41J2/16 , C09D11/00
摘要： PROBLEM TO BE SOLVED: To solve such a trouble that ejection failures are apt to take place because of the poor efficiency for discharging bubbles. SOLUTION: A common liquid chamber 8 is formed plane and made narrower in the breadth in accordance with a distance increase from an ink supply port 19.

3. 发明专利

JP2002052730A METHOD FOR FILLING INK JET RECORDER WITH INK, INK JET RECORDER, AND INK JET HEAD 失效
公开(公告)号：JP2002052730A
公开(公告)日：2002-02-19
申请号：JP2000239935
申请日：2000-08-08
申请人： RICOH KK
发明人： KATO TOMOKI , HOSHINO SEIJI , FUJII MITSUYOSHI , MATSUMOTO SHUZO
IPC分类号： B41J2/175
摘要： PROBLEM TO BE SOLVED: To ensure a good ink filling performance by enhancing the ink filling performance of a filter provided in the ink supply passage of an ink jet head. SOLUTION: The ink jet head comprises ink pressurization chambers 11 and nozzles 15 communicating with the ink pressurization chambers and forms an image by ejecting ink from the nozzles 15. The ink jet head is provided with ink supply channels 16, 17 and a filter 6 provided in the ink supply channels and an image is formed by applying a pressure to ink in the ink pressurization chambers 11 thereby ejecting ink drops from the nozzles 15. At the time of filling the ink pressurization chambers 11 of the ink jet head with ink, ink is supplied such that no air is left on the ink inflow side 16 of the filter 6. The filter 6 is held horizontally and the ink level in the chamber 16 is increased gradually so that the entire surface of ink touches the entire lower surface of the filter 6 simultaneously.

4. 发明专利

JP2001310463A INK JET HEAD AND METHOD OF MAKING THE SAME 失效
公开(公告)号：JP2001310463A
公开(公告)日：2001-11-06
申请号：JP2000128391
申请日：2000-04-27
申请人： RICOH KK
发明人： OTAKA KOICHI , FUJII MITSUYOSHI , SATO YUKITO , KATO SEIICHI , AZUMI JUNICHI , IRINODA MITSUGI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/14 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To provide an edge shooter type ink jet head and a method of making the same capable of increasing the number of nozzles by a simple way and of achieving the accuracy of arrangement of the nozzles. SOLUTION: There is disclosed the ink jet head wherein a plurality of heads (101, 102) each having one row of nozzles (103, 104) are bonded with each other to form the arrangement of the nozzles in a staggered fashion. The ink jet head has head bonding faces having fitting structures (105, 106, 107, 108) formed thereon.

5. 发明专利

JP2000071452A INK JET HEAD 失效
公开(公告)号：JP2000071452A
公开(公告)日：2000-03-07
申请号：JP24855998
申请日：1998-09-02
申请人： RICOH KK
发明人： FUJII MITSUYOSHI
IPC分类号： B41J2/045 , B41J2/015 , B41J2/055 , B41J2/16
摘要： PROBLEM TO BE SOLVED: To ensure long term reliability by forming a piezoelectric thin film element in an actuator by water heat method. SOLUTION: Since crystal nuclei of PZT are generated on the surface of a titanium oxide substrate serving as a diaphragm 5 through reaction on aqueous solution containing zirconium and lead, PZT crystals are generated from the crystal nuclei by subjecting substrate to water heat treatment in the aqueous solution containing zirconium and lead. A piezoelectric thin film element 7 is thereby formed on the diaphragm 5 and divided into elements corresponding to individual nozzles 12 (pressurized liquid chamber 9) by scanning the integrated piezoelectric thin film element 7 with laser light 42 from a laser light source 41 using a mirror 43. Since an actuator has a piezoelectric thin film element formed by water heat method, it can be formed integrally with the diaphragm without requiring any bonding process and long term reliability can be guaranteed.

6. 发明专利

JPH11198365A INK JET HEAD 失效
公开(公告)号：JPH11198365A
公开(公告)日：1999-07-27
申请号：JP810698
申请日：1998-01-19
申请人： RICOH KK
发明人： FUJII MITSUYOSHI , MATSUMOTO SHUZO , MURAI TAEKO , NARUSE OSAMU
IPC分类号： B41J2/045 , B41J2/055 , H05K1/18 , H05K3/36
摘要： PROBLEM TO BE SOLVED: To realize a high density by a method wherein actuator elements and a driving circuit are connected together through a flexible wiring board and, at the same time, the driving circuit is mounted on the flexible board. SOLUTION: In an electrical component unit 4, driving ICs 32 are mounted on a flexible wiring board 31 by providing the driving ICs 32, each of which is a driving circuit for applying driving wave forms to the piezoelectric elements of an actuator unit, trimming resistances 33 for adjusting the scatterings of ink drop speeds of respective nozzles, connecting terminals 34 to the actuator unit, connecting terminals 35 to a device main body and lead wire patterns 37 for electrically connecting the driving ICs 32 to the connecting terminal 35 to the device main body on the flexible wire board 31. Thus, even when the number of actuator elements increases as the image quality and the arrangemental density of parts become higher, the electrical wiring between the driving circuit and the actuator elements can be easily executed.

7. 发明专利

JPH1158779A INK JET RECORDER 失效
公开(公告)号：JPH1158779A
公开(公告)日：1999-03-02
申请号：JP22227497
申请日：1997-08-19
申请人： RICOH KK
发明人： FUJII MITSUYOSHI , MATSUMOTO SHUZO , MURAI TAEKO , OTA YOSHIHISA
IPC分类号： B41J2/175 , B41J2/205 , B41J19/18
摘要： PROBLEM TO BE SOLVED: To enhance the image quality by applying a driving waveform of such magnitude as causing no jetting of ink drop entirely to a plurality of energy generating elements for jetting an ink drop from a nozzle thereby suppressing fluctuation in the dot diameter while preventing the printing speed from lowering. SOLUTION: After finishing the line feed or reset operation of a carriage and before starting print operation, the non-jet drive waveform (pulse train) of a drive waveform in a head drive circuit is selected by a control signal and applied to each piezoelectric element of all nozzles. The non-jet drive waveform is a pulse train having a period of about 800 μs and a voltage of about 10 V. Since an energy generating means, i.e., the piezoelectric element 32, is displaced by an elongation δ, a faint vibration is applied in the arrow direction to an ink having increased viscosity in an nozzle 36 and the viscosity of ink is decreased.

8. 发明专利

JPH10337875A NOZZLE FORMING MEMBER, MANUFACTURE THEREOF AND INK JET HEAD 失效
公开(公告)号：JPH10337875A
公开(公告)日：1998-12-22
申请号：JP14966097
申请日：1997-06-06
申请人： RICOH KK
发明人： MIYAGUCHI YOICHIRO , IWAMA KENZO , FUJII MITSUYOSHI
IPC分类号： B41J2/045 , B41J2/055 , B41J2/135
摘要： PROBLEM TO BE SOLVED: To obtain a nozzle forming member having a high resistance to ink, enabling sure attainment of high component precision and being excellent in mass-production properties and cost reduction by forming a nozzle hole in an SUS base by etching. SOLUTION: A nozzle plate 33 is prepared by forming a nozzle hole 38 in an SUS base 61 such as SUS 304 by etching. As for the internal shape of the nozzle hole 38, the ink liquid chamber side thereof is shaped like a horn of a large diameter, while a nozzle opening 38a of a prescribed diameter is formed by a heterogeneous metal layer 62 laminated on the ink jet face side of the SUS base 61. Moreover, a surface treated film 47 having water repellency is formed on the surface side of the heterogeneous metal layer 62. The SUS base 61 has durability in regard to ionic ink and, by enhancing the anisotropy by an etching method, it is made possible to secure also component precision and to attain mass-production properties and cost reduction. By forming the internal shape of the nozzle hole 38 like the horn, besides, it is made possible to ensure the volume of an ink droplet and to improve a discharge velocity of the ink droplet.

9. 发明专利

JPH08323978A INK-JET HEAD 失效
公开(公告)号：JPH08323978A
公开(公告)日：1996-12-10
申请号：JP13664095
申请日：1995-06-02
申请人： RICOH KK
发明人： FUJII MITSUYOSHI , KOU TAIKOU
IPC分类号： B41J2/015
摘要： PURPOSE: To provide an ink-jet head which is of reduced power consumption and uses hotmelt ink of decreased cost without causing lowering of printing speed. CONSTITUTION: A head substrate 4 is made from a silicon substrate, impurity areas 25 with impurities doped are formed on the inner surface side of ink supply route 23 which is a part of the substrate 4, on the ink tank side, and on the periphery of the route 23 on the side of a common liquid chamber 8, electrodes 26, 27 facing each other with the areas 25 between them are installed on the surfaces on the ink tank 3 side and the common liquid chamber 8 side, the areas 25 are made to generate heat by passing the electric current through the electrodes 26, 27, and the inside of the ink tank 3, the inside of an ink supply route 11, the common liquid chamber 8, etc., are heated simultaneously.

10. 发明专利

JPH04347808A LASER DIODE HOLDING DEVICE AND ITS OPTICAL AXIS ADJUSTING METHOD 失效
公开(公告)号：JPH04347808A
公开(公告)日：1992-12-03
申请号：JP12063491
申请日：1991-05-27
申请人： RICOH KK
发明人： FUJII MITSUYOSHI
IPC分类号： G02B7/00 , G03G15/04
摘要： PURPOSE:To reduce the man-hours for the manufacture and improve the optical axis adjustment accuracy. CONSTITUTION:In the laser diode holding device equipped with a base 25 which is interposed between a collimator lens 21 and a laser diode 24 and holds the collimator lens 21 and laser diode 24 at a specific-distance interval and a pressure plate 26 which presses and fixes a laser diode 24 to the base 25. the pressure plate 26 is composed of a printed board which has a core material made of metal.

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