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1. 发明授权

US5128719A Electrostatic recording apparatus capable of preventing adhesion of excessive toner 失效
标题翻译：静电记录仪可防止过度粘贴
公开(公告)号：US5128719A
公开(公告)日：1992-07-07
申请号：US64191891
申请日：1991-01-16
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： UMEDA TAKAO , NAGATA TETSUYA , IGAWA TATSUO , NAKAMURA KIMIO , NISHINO SHINICHI , OGAWA TOSHITAKA
IPC分类号： G03G15/16 , G03G15/00 , G03G15/02 , G03G21/00 , G03G21/16
CPC分类号： G03G15/752 , G03G15/0266
摘要： An electrostatic recording apparatus includes a drum having an opening and a photosensitive sheet wound thereon. A cap seal member is provided at the opening and has a metal portion and a dielectric film formed on a part of the metal portion. The dielectric film has a relative permittivity in a range from substantially the same as that of toner to a value of 200.
摘要翻译：静电记录装置包括具有开口的卷筒和卷绕在其上的感光片。在开口处设置盖密封构件，并且具有形成在金属部分的一部分上的金属部分和电介质膜。电介质膜的相对介电常数在与调色剂基本相同的范围内，为200。

2. 发明专利

DE69117563T3 未知
公开(公告)号：DE69117563T3
公开(公告)日：2005-06-09
申请号：DE69117563
申请日：1991-04-11
申请人： HITACHI LTD
发明人： MIYASAKA TORU , UMEDA TAKAO , NAGATA TETSUYA , IGAWA TATSUO
IPC分类号： G01R29/12 , G01R29/14 , G03G15/00 , G03G15/02 , G03G15/04 , G03G15/043 , G03G15/22 , G03G21/00
摘要： An electrostatic recorder is provided with an electrostatic latent image measuring instrument (4c) for measuring a state of an electrostatic latent image formed on a photosensitive substance (6), and executes a printing process until an electrostatic latent image formed on a surface of a photosensitive substance (6) based on measured data is transferred onto a blank form as a visual image by means of a transfer device by adjusting control factors such as exposure, exposure time, electrostatic charge voltage, development bias, temperature and humidity. Further, the electrostatic latent image measuring instrument (4c) is provided with distance sensors (1), which when a measuring electrode (3a) is made close to the photosensitive substance (6), keeps the distance therebetween constant. It is thus possible to measure an electrostatic latent image even if the photosensitive substance (6) is eccentric. Furthermore, spark between the measuring electrode (3a) and the photosensitive substance (6) is prevented by filling with a gas having a high spark starting voltage between the measuring electrode (3a) and the photosensitive substance (6) of the electrostatic latent image measuring instrument (4c).

3. 发明专利

DE4420667C2 未知
公开(公告)号：DE4420667C2
公开(公告)日：2003-12-18
申请号：DE4420667
申请日：1994-06-14
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： UMEDA TAKAO , KAWAI KATSUYA , SAITO YOSUKE , MABUCHI HIROYUKI , ANZAI MASAYASU , MIWA MASATO , SUZUKI TAKASHI
IPC分类号： G03G15/00 , G03G15/16 , G03G21/00 , G03G21/10
摘要： A bias cleaning system has an electrically conductive brush roller for collecting toner which has to adhered a transfer belt by scrubbing the toner off the transfer belt under a condition in which a direct current voltage of the opposite polarity to the charge of the toner is applied to the brush roller. A corona charger is also provided for decreasing the amount of charge on the toner on the transfer belt in a region of the belt up-stream of the electrically conductive brush roller in the moving direction of the transfer belt.

4. 发明专利

DE69117563D1 未知
公开(公告)号：DE69117563D1
公开(公告)日：1996-04-11
申请号：DE69117563
申请日：1991-04-11
申请人： HITACHI LTD
发明人： MIYASAKA TORU , UMEDA TAKAO , NAGATA TETSUYA , IGAWA TATSUO
IPC分类号： G01R29/12 , G01R29/14 , G03G15/00 , G03G15/02 , G03G15/04 , G03G15/043 , G03G15/22 , G03G21/00
摘要： An electrostatic recorder is provided with an electrostatic latent image measuring instrument (4c) for measuring a state of an electrostatic latent image formed on a photosensitive substance (6), and executes a printing process until an electrostatic latent image formed on a surface of a photosensitive substance (6) based on measured data is transferred onto a blank form as a visual image by means of a transfer device by adjusting control factors such as exposure, exposure time, electrostatic charge voltage, development bias, temperature and humidity. Further, the electrostatic latent image measuring instrument (4c) is provided with distance sensors (1), which when a measuring electrode (3a) is made close to the photosensitive substance (6), keeps the distance therebetween constant. It is thus possible to measure an electrostatic latent image even if the photosensitive substance (6) is eccentric. Furthermore, spark between the measuring electrode (3a) and the photosensitive substance (6) is prevented by filling with a gas having a high spark starting voltage between the measuring electrode (3a) and the photosensitive substance (6) of the electrostatic latent image measuring instrument (4c).

5. 发明专利

DE19519458A1 Fixing unit for electrophotographic equipment 未知
公开(公告)号：DE19519458A1
公开(公告)日：1995-11-30
申请号：DE19519458
申请日：1995-05-26
申请人： HITACHI KOKI KK , HITACHI LTD
发明人： KANEKO TADAHIRO , UMEDA TAKAO , MAEKAWA TSUTOMU , MITSUYA TERUAKI
IPC分类号： G03G15/20
摘要： The fixing unit comprises a fixing drum (1) revolving round a heater (2) and a pressure roller (3) revolving in the opposite direction. The drum and roller work in conjunction with one another to produce a gripping action (9). This action holds the registering material (4) which carries the unfixed pictures (7). The material is transported through the system by the upward pressure of a further roller (5) and the pressure of two leading rollers (6). The pressure exerted by the leading rollers (6) on the carrying material must be greater than the friction between it and the fixing drum (1) but less than the pressure needed to deform it.

6. 发明专利

DE3248137A1 未知
公开(公告)号：DE3248137A1
公开(公告)日：1983-07-14
申请号：DE3248137
申请日：1982-12-27
申请人： HITACHI LTD
发明人： MIYASHITA TAKAO , SHIMAZAKI YUZURU , UMEDA TAKAO , IGAWA TATSUO , ITO REN , NAKANO FUMIO , TANNO SEIKICHI , HONJUYO KOO , SUZUKI HIROSHI
IPC分类号： G02F1/1333 , G02F1/133 , G09F9/35

7. 发明专利

DE3242847A1 未知
公开(公告)号：DE3242847A1
公开(公告)日：1983-06-01
申请号：DE3242847
申请日：1982-11-19
申请人： HITACHI LTD
发明人： UMEDA TAKAO , SIMAZAKI YUZURU , IGAWA TATSUO , TANNO SEIKICHI , SASAKI KEN , MIYASHITA TAKAO
IPC分类号： G02F1/1333 , G02B5/30 , G02F1/1335 , G02F1/13363 , G02F1/137 , G02F1/139 , G09F9/35 , G02F1/133
摘要： A liquid crystal display device is disclosed in which a liquid crystal material mixed with a dichroic dye is held between a pair of substrates whose facing surfaces are provided with electrodes, so that a picture element is made up of a pair of facing portions of the electrodes and a portion of the liquid crystal material sandwiched by the facing portions, in which a reflecting plate is adjacent to one of the substrates, and in which at least one of the substrates is formed of a birefringent material having slow and fast principal axes of birefringence. In the above device, an angle between the direction of the absorption axis of the dichroic dye and one of the principal axes of birefringence of the substrate is selected so that the contrast and viewing-direction characteristic of the device can be improved.

8. 发明专利

DE4291112C2 未知
公开(公告)号：DE4291112C2
公开(公告)日：1997-01-30
申请号：DE4291112
申请日：1992-04-10
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： NAGATA TETUYA , UMEDA TAKAO , TAKUMA YASUO , IGAWA TATSUO , MIWA MASATO , ASAMURA KIYOSHI
IPC分类号： G03G15/16

9. 发明专利

CA1325241C ELECTROSTATIC RECORDING APPARATUS, METHOD OF CONTROLLING THEAPPARATUS, AND METHOD OF EVALUATING LIFE OF PHOTOCONDUCTIVE MEMBER OF ELECTROSTATIC RECORDING APPARATUS 未知
公开(公告)号：CA1325241C
公开(公告)日：1993-12-14
申请号：CA594356
申请日：1989-03-21
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： UMEDA TAKAO , MIYASAKA TORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00
摘要： A potential of a reference potential measure section is set to a desired value of a potential of a drum surface (charge receptive surface) such that a potential of the reference potential measure section and a potential of the charge receptive surface are detected by a surface potential detect device during a rotation of the drum to obtain a difference between the values of the measured potential, so that an operation of a charger is controlled to be reduced to zero, thereby changing the potential of the charge receptive surface. This enables the surface potential to be precisely controlled without necessitating a frequent calibration of the surface potential detect device. In addition, the potential of the reference potential measure section is appropriately set depending on a develop condition so as to prevent a toner, when the portion passes a developer at a position over a circumferential area of the drum, from being fixed thereonto. Moreover, a potential of the reference potential detect section and a potential of the charge receptive surface are detected by use of the surface potential detect device so as to examine a difference therebetween and a distribution thereof, which enables a change as well as an irregular variation of the potential due to deterioration of the charge receptive surface to be analyzed. based on the analysis, it is possible to detect the deterioration of the photoconductive body as the charge receptive surface so as to evaluate the life thereof. Furthermore, when an information processing system is configured by combining a computer with an electrostatic recording apparatus according to the present invention, there can be provided a picture quality control system effecting a precise control depending on a characteristic of the photoconductive body.

10. 发明专利

DE3586147T2 未知
公开(公告)号：DE3586147T2
公开(公告)日：1992-12-03
申请号：DE3586147
申请日：1985-07-02
申请人： HITACHI LTD
发明人： UMEDA TAKAO , OHISHI KAZUYA , IGAWA TATSUO , HORI YASURO
IPC分类号： G09G3/18 , G02F1/01 , G02F1/13 , G02F1/133 , G06K15/12 , B41J2/435 , G09G3/36
摘要： In a driving method of an optical switch element for controlling a quantity of transmission light between opposed electrodes by interposing a transparent, high dielectric material (4) between the opposed electrodes (6a, 6b) and applying a positive or negative voltage between the opposed electrodes, (by changing over a switch 13 from a terminal a to terminal b or terminal c) the improvement wherein a period in which the opposed electrodes are substantially short-circuited is disposed in order to make it possible to either reduce or eliminate stored charge.This method can be applied in a printer using the optical switch element.

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