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1. 发明专利

JP2003315707A Multi-beam laser printer and horizontal step-out detection method for multi-beam laser scanning optical system 审中-公开
标题翻译：多波束激光扫描光学系统的多光束激光打印机和水平步进检测方法
公开(公告)号：JP2003315707A
公开(公告)日：2003-11-06
申请号：JP2002118660
申请日：2002-04-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YAMAMOTO YUKIO , SUMIYOSHI MICHIO , SHOJI JUNICHI , MATSUO KAZUYOSHI , OTAKA MAKOTO , TAKEYA MASAHARU , SHIBUYA TAKESHI
IPC分类号： B41J2/44 , G02B26/10 , H04N1/036 , H04N1/113
摘要： PROBLEM TO BE SOLVED: To provide a method of detecting a horizontal step-out of a multi-beam laser scanning system with high accuracy by using simple constitution and processing.
SOLUTION: The horizontal step-out Td is detected from the difference between a beam detect signal pulse with T2 obtained when a 1st light emitting element is continuously driven and a pulse with Tw+Td when the driving is switched halfway from the 1st light emitting element to a 2nd light emitting element. Only one light emitting element is always driven before and after a rise and a fall of the beam detect signal, so that the influence of a difference in laser power is eliminated.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种通过简单的结构和处理以高精度检测多光束激光扫描系统的水平逐步退出的方法。解决方案：从第1发光元件连续驱动时获得的光束检测信号脉冲与第1发光元件连续驱动时的T2检测信号脉冲与当从第1发光元件的中途切换时的Tw + Td的脉冲之间的差检测出水平失步Td 发光元件连接到第二发光元件。始终在光束检测信号的上升和下降之前和之后驱动一个发光元件，从而消除了激光功率差的影响。版权所有（C）2004，JPO

2. 发明专利

JP2001096841A IMAGE FORMATION UNIT 失效
公开(公告)号：JP2001096841A
公开(公告)日：2001-04-10
申请号：JP27817299
申请日：1999-09-30
申请人： HITACHI LTD
发明人： ONOSE ATSUSHI , SUMIYOSHI MICHIO , TADOKORO HIROYUKI
IPC分类号： B41J29/00 , B65H3/44
摘要： PROBLEM TO BE SOLVED: To provide an additional sheet feeder which can be laid on or under another feeder regardless of whether it shoud be put above or below. SOLUTION: An upper connector and a lower connector are respectively provided at an additional sheet feeder, and a plurality of signal systems are provided respectively for the connectors. One signal system out of the signal systems of the upper connector is connected to a drive circuit which drives its own sheet feeder while the other signal systems are connected to the lower connector, and one out of the other signal systems is connected to a drive circuit of another additional sheet feeder laid below. As a result, the additional sheet feeder can be laid on or under another sheet feeder regardless of whether it should be put above or below. Further, an addition detecting signal for detecting connection of the additional sheet feeder is provided at each of the signal systems, and the number of tiers of the placed additional sheet feeders is detected and controlled therewith.

3. 发明专利

JPH1120276A DEVICE AND SYSTEM FOR ELECTROPHOTOGRAPHIC RECORDING 失效
公开(公告)号：JPH1120276A
公开(公告)日：1999-01-26
申请号：JP18270297
申请日：1997-07-08
申请人： HITACHI LTD
发明人： SUMIYOSHI MICHIO , FUKAZAWA NOBUAKI
IPC分类号： B41J29/38 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To realize an engine control device which corresponds with various kinds of electrophotographic recording systems. SOLUTION: An engine control device is constituted in such a manner that it may selectively correspond with a plurality of kinds of linked modes which are demanded by a host printer control device 200. Then, the engine control device selectively sets a linked mode with the printer control device in response to the information from the printer control device 200, under a system constituted state.

4. 发明专利

JPH113021A ELECTROPHOTOGRAPHIC RECORDING DEVICE AND ELECTROPHOTOGRAPHIC RECORDING SYSTEM 失效
公开(公告)号：JPH113021A
公开(公告)日：1999-01-06
申请号：JP15511997
申请日：1997-06-12
申请人： HITACHI LTD
发明人： FUKAZAWA NOBUAKI , SUMIYOSHI MICHIO , MATSUO KAZUYOSHI , FURUKAWA SHIGETAKA
IPC分类号： B41J29/38 , G03G21/14
摘要： PROBLEM TO BE SOLVED: To simplify a paper feeding mechanism for feeding a nonstandard size paper. SOLUTION: In the case of recording on the nonstandard-size paper, a nonstandard-size recording paper is fed from a paper feeding cassette by an engine controller 4, and also, such a horizontal synchronizing signal and a vertical synchronizing signal are generated that are suitable for a recording control state with reference to the maximum-sized recording paper capable of recording by an electrophotographic process executing means while disregarding the detection information on the size of the recording paper stored in the paper feeding cassette. Data on an image to be recorded is transferred by a master controller 3 in accordance with the horizontal synchronizing signal and the vertical synchronizing signal.

5. 发明专利

JPH08204900A COLOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH08204900A
公开(公告)日：1996-08-09
申请号：JP791095
申请日：1995-01-23
申请人： HITACHI LTD
发明人： SUMIYOSHI MICHIO , SASAKI AKIRA
IPC分类号： G03G21/00 , G03G15/01 , H02P29/00 , H04N1/04 , H04N1/053 , H04N1/46 , H04N1/50 , H04N1/54 , H04N1/56 , H04N1/60 , H02P5/00
摘要： PURPOSE: To enable color matching correction for the color slippage according to the change of the drive force between each component due to the aging factor of a printer generated over a long range, by correcting the speed difference of a photosensitive body and an intermediate transfer body based on the information stored in an information storage means. CONSTITUTION: Based on the signal from a detection means 224 detecting a specified location which is always generated while an intermediate transfer body 221 rotates, the detection of rotation speed is arbitrarily executed and the convergence rotation speed of the intermediate transfer body 221 measured by using the rotation speed measuring means (270) of the intermediate transfer body 221 which is possible to be stopped is held in an information storage means (270) which is capable of holding the speed also when the power of a printer is turned off. By using the information in this information storage means (270), the difference of the convergence rotation speed for reference rotation speed of color slippage amount can be made clear. Further, if the information for a certain time is held, the degree of the color slippage within the convergence rotation speed for the long period of the printer can be recognized and can be adjusted.

6. 发明专利

JPH0752455A COLOR PRINTER 失效
公开(公告)号：JPH0752455A
公开(公告)日：1995-02-28
申请号：JP20606093
申请日：1993-08-20
申请人： HITACHI LTD
发明人： OKUHAMA MASASHI , SASAKI AKIRA , TADOKORO HIROYUKI , SUMIYOSHI MICHIO
IPC分类号： B41J2/525 , B41J2/44 , G03G15/01
摘要： PURPOSE:To make the pitch precision between rasters for each printing page more accurate, and form a favorable color image by a method wherein the rotating speed of a photosensitive element at the time of printing of a next page is adjusted, and the speed of an intermediate transfer body is always controlled at a specified speed. CONSTITUTION:An intermediate transfer drum 221 rotates in the direction shown by arrow while synchronizing with the surface of a photosensitive element by a driving force from a contact part 301 with a motor 219 for photosensitive element drum-driving as the driving source. On the inside of the intermediate transfer drum 221, a transfer device 222 to transfer a toner image on the surface of the photosensitive element to the surface of the intermediate transfer drum 221 is provided. A separatable cleaner 223 is provided on the surface of the intermediate transfer drum 221, and the toner which remains on the surface is removed. In addition, in order to generate a reference position signal TPS for the intermediate transfer drum 221, a reflection type photosensor 224 to read a reference position mark being formed on the outer peripheral surface of the intermediate transfer drum 221 is arranged.

7. 发明专利

JPH04114119A LASER PRINTER 失效
公开(公告)号：JPH04114119A
公开(公告)日：1992-04-15
申请号：JP23313890
申请日：1990-09-05
申请人： HITACHI LTD
发明人： SUMIYOSHI MICHIO
IPC分类号： G02B26/10 , B41J2/44 , G03G15/04
摘要： PURPOSE:To apply the laser printer to plural kinds of high-class video signal generator each employing a different synchronizing signal system by providing a reference signal selecting means which makes selectively effective one of a 1st reference signal corresponding to a print area and a 2nd reference signal used as the reference to find the print area. CONSTITUTION:A reference signal generating means 109 is provided with 1st reference signal generating circuits 102 and 105 which generate the 1st reference signal DIV corresponding to the print area 12, 2nd reference signal generating means 102 and 105 which generate the 2nd reference signal DI used as the reference to find the print area 12, and the reference signal selecting means 108 which selectively signifies one of the 1st and 2nd reference signals DIV and DI. In this case, the reference signal generating means 102 and 105 selectively generate the 1st reference signal DIV (synchronizing signal) corresponding to the print area and the 2nd reference signal DI (synchronizing signal) used as the reference to find the print area 12. Consequently, the laser printer is applicable to plural kinds of video signal generator each employing a different synchronizing signal system.

8. 发明专利

JPH01177558A DRIVING DEVICE FOR ELECTROPHOTOGRAPHIC PRINTER 失效
公开(公告)号：JPH01177558A
公开(公告)日：1989-07-13
申请号：JP125688
申请日：1988-01-08
申请人： HITACHI LTD
发明人： KANAI HIROSHI , SUMIYOSHI MICHIO
IPC分类号： G03G15/00
摘要： PURPOSE:To improve productivity, maintainability, and performance by uniting a driving device in the way that an inside panel and an outside panel on the side of a frame for a main body are made into a main frame. CONSTITUTION:The driving device is united by making the inside panel 15 and the outside panel 16 on the side of the frame 14 for the main body into the main frame. A driving motor 17 is fixed outside of the outside panel 16 and drives gear trains 19 and 23 placed between the panels of the both sides. A belt shaft 22 is belt-connected outside of the outside panel 16. Since the united driving device is considerably small compared to the frame 14 for the main body, the main frame comprised of two side panels 15 and 16 also becomes small-sized and lightweight accordingly; and this facilitates the handling of the device. Thus, mounting work of components, testing work after mounting, and adjusting work become easy. Since the gear trains 19 and 23, which required highly precise fabrication but has the flow frequency of their replacement are placed between the two side panels 15 and 16, the precise fabrication is secured. The belt 29 and the driving motor 17, both of which have high frequency of their replacement, are arranged outside of the outside panel 16, and thereby replacement work is easy.

9. 发明专利

JP2001117435A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2001117435A
公开(公告)日：2001-04-27
申请号：JP29340199
申请日：1999-10-15
申请人： HITACHI LTD
发明人： SATO KOICHI , SUMIYOSHI MICHIO , FUKAZAWA NOBUAKI , NARITA SATOSHI
IPC分类号： G03G21/00 , G03G15/20
摘要： PROBLEM TO BE SOLVED: To solve the problem of difficulty in power consumption reduction only by turning off a fixing heater or cooling heater corresponding to insistence on the recent insistent necessity for reduction of power consumption. SOLUTION: The image forming device has a power source, which can be turned on/off, and a circuit configuration capable of turning on/off the power source. When reducing power consumption, one part of a circuit and the power source of a unit are turned off so that power consumption can be reduced and further power consumption reduction can be achieved. Thus, the image forming device of low power consumption can be provided.

10. 发明专利

JP2000344411A DOUBLE-SIDE PRINTER 失效
公开(公告)号：JP2000344411A
公开(公告)日：2000-12-12
申请号：JP15259699
申请日：1999-05-31
申请人： HITACHI LTD
发明人： OUCHI YOSHIO , SHIMIZU AKIRA , FUKAZAWA NOBUAKI , SUMIYOSHI MICHIO , NARITA SATOSHI , TAKADA KIMINORI
IPC分类号： B65H29/58 , B65H85/00 , G03G15/00 , G03G15/23
摘要： PROBLEM TO BE SOLVED: To provide a small-sized double-side printer not allowing extraction of a paper having only one printed surface from the outside with a simple structure. SOLUTION: This double-side printer has a paper discharge tray 28 for discharging a printed paper 27, and a paper reversing mechanism including a reverse temporary storage part (a paper reverse passage) 9 reversing the paper 27 in the case of double-side printing by guiding the paper 27 to a direction different from a discharging direction to the discharge tray 28, once exposing the paper 27 outside a printer body 25 and oppositely rotating the carrying roller 174. By providing a protection cover 170 for covering the paper 27 carried into the reverse temporary storage part 9 to the printer, the paper 27 having only one printed surface cannot be extracted from the outside.

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