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1. 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.

2. 发明专利

DE4420667A1 Voltage cleaning system, electrostatic printing device and method for operating the system and the device 未知
公开(公告)号：DE4420667A1
公开(公告)日：1994-12-15
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 voltage cleaning system has an electrically conductive brush roller for collecting toner which adheres to a transmission belt, by scrubbing the part to which the toner adheres, under a condition that a direct voltage with a polarity is applied which is inverse to the charge of the toner, and which furthermore has a corona charger for the reduction of the amount of charged toner on the transmission belt, which charger is arranged in the upstream direction of the current of the electrically conductive brush roller in the movement direction of the transmission belt.

3. 发明专利

DE2754994A1 未知
公开(公告)号：DE2754994A1
公开(公告)日：1978-06-22
申请号：DE2754994
申请日：1977-12-09
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： MUKOH AKIO , MORISHITA HIROSADA , ANZAI MASAYASU , TOKUNAGA KAZUYOSHI , KIKUCHI KASUO
IPC分类号： G03G9/08 , G03G9/107 , G03G13/06 , G03G13/08 , G03G13/09 , G03G15/08 , G03G15/09 , G03G9/14

4. 发明专利

DE3330273A1 未知
公开(公告)号：DE3330273A1
公开(公告)日：1984-02-23
申请号：DE3330273
申请日：1983-08-22
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： KOMATSU ISAMU , ANZAI MASAYASU , HOSHI NOBUYOSHI , AKIMARU SUSUMU
IPC分类号： G03G15/01 , G03G15/08

5. 发明专利

DE2848016A1 未知
公开(公告)号：DE2848016A1
公开(公告)日：1979-05-10
申请号：DE2848016
申请日：1978-11-06
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： ANZAI MASAYASU , TERAHASHI ISAMU
IPC分类号： G03G15/08
摘要： Apparatus for monitoring the concentration of toner in a mass of developer mix including the toner and carrier particles, having a sampling cylinder inside which the developer mix flows. An accumulating cylinder is disposed over the sampling cylinder. At the upper end part of the accumulating cylinder, a guide plate is disposed by which the developer mix is supplied to the accumulating cylinder. At the lower end part of the accumulating cylinder, a developer mix supplying roll is disposed by which the developer mix at a fixed flow rate is supplied to the upper end opening of the sampling cylinder. On the other hand, at the lower end opening of the sampling cylinder, there is disposed a magnet roll by which the developer mix at a fixed flow rate is discharged from inside the sampling cylinder. The flow rate of the developer mix to be supplied to the sampling cylinder is set to be greater than the flow rate of the developer mix to be discharged, so that part of the developer mix supplied towards the sampling cylinder overflows from the upper edge of the sampling cylinder. Therefore, the developer mix inside the sampling cylinder flows in a stable state. A detecting coil is disposed on the outer periphery of the sampling cylinder, and detects the toner concentration of the developer mix in the form of an inductance.

6. 发明专利

DE2929548A1 未知
公开(公告)号：DE2929548A1
公开(公告)日：1980-03-13
申请号：DE2929548
申请日：1979-07-20
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： TOKUNAGA KAZUYOSHI , ANZAI MASAYASU
IPC分类号： G03G15/16 , G03G13/16
摘要： In a method for electrophotography comprising an electrostatic transfer process, after an electrostatic latent image formed on a surface of a photoconductive and photosensitive member has been developed with toner, the surface of the photoconductive and photosensitive member and a toner image are charged at the same polarity as the electrostatic latent image and thereafter the toner image is electrostatically transferred onto a recording medium to obtain a record.

7. 发明专利

DE4316287C2 未知
公开(公告)号：DE4316287C2
公开(公告)日：2000-05-18
申请号：DE4316287
申请日：1993-05-14
申请人： HITACHI KOKI KK
发明人： ANZAI MASAYASU , KIKUCHI YASUO
IPC分类号： G03G15/01 , G03G15/02 , G03G15/08 , G03G15/23 , H04N1/29 , G03G15/16 , G03G15/22 , G03G15/00
摘要： A first-side toner image 25 is formed on a photo receptor 2 and transferred on a dielectric belt 19. A second-side toner image 18 is formed on the photo receptor 2. The two toner images 25 and 18 are simultaneously transferred on both sides of a print paper 26, and fixed thereon by paired heat rolls 30 and 31.

8. 发明专利

DE4316287A1 Toner image prodn. system for high speed duplex colour printing - has toner images formed at same time on both sides and fixed through heater roller pair 未知
公开(公告)号：DE4316287A1
公开(公告)日：1993-11-18
申请号：DE4316287
申请日：1993-05-14
申请人： HITACHI KOKI KK
发明人： ANZAI MASAYASU , KIKUCHI YASUO
IPC分类号： G03G15/01 , G03G15/02 , G03G15/08 , G03G15/23 , H04N1/29 , G03G15/16 , G03G15/22 , G03G15/00
摘要： The apparatus has a recording medium, a drum (1) with a photoreceptor (2), on which the toner images are formed. A transfer unit transfers the first toner image, which has been produced on the drum, on to a second recording medium,i.e. dielectric band (19). A second transfer unit is provided, for transferring the toner images onto both sides of the third recording medium i.e. paper (26,29) fixed by rollers (30,31). ADVANTAGE - Reliable toner images can be printed on both sides of print paper at high speed, without increasing developing speed. Images of high quality are produced with required alignment accuracy.

9. 发明专利

DE19628051B4 未知
公开(公告)号：DE19628051B4
公开(公告)日：2004-04-22
申请号：DE19628051
申请日：1996-07-11
申请人： HITACHI KOKI KK
发明人： TSUJITA AKIO , ANZAI MASAYASU , KAWANISHI TSUNEAKI
IPC分类号： G03G15/00 , G03G5/08 , G03G13/26 , G03G15/04 , G03G15/08 , G03G15/32 , G03G21/08 , G03G15/22
摘要： In an image forming apparatus forming an electrostatic latent image on a surface of a photosensitive body by exposing the charged photosensitive body, developing the latent image using a toner to form a toner image, transferring the toner image to a image holding body, and erasing the remaining charge on the surface of the photosensitive body after completion of the transferring, the photosensitive body is formed of a base material consisting of As2Se3 or a-Si, and wherein the wavelength lambda 0 of the writing light used for the exposure is limited to a wavelength not larger than 780 nm, the wavelength lambda 1 of charge erasing light used for the charge erasing is limited to a wavelength smaller than 680 nm, and the time T1 from completion of the exposure to initiation of the development is limited within the range of 70 milliseconds to 300 milliseconds.

10. 发明专利

DE4409188A1 Recording device and its developing device 未知
公开(公告)号：DE4409188A1
公开(公告)日：1994-09-22
申请号：DE4409188
申请日：1994-03-17
申请人： HITACHI KOKI KK
发明人： KAWAI KATSUYA , ANZAI MASAYASU , HARADA TOSHIMITSU , NISHINO SHINICHI
IPC分类号： G03G21/00 , G03G21/10
摘要： In an electrophotographic recording device there are arranged a charge-feed unit and a light-extinguishing unit in this sequence, seen in the direction in which a photoreceptor rotates, that is to say in a location between a transfer unit and a bias-voltage cleaning unit, and light is projected from a light-extinguishing unit onto a photoreceptor surface area, with the exception of the area to which a charge is fed. A developing device of such a type, in which a cleaning section for removing and collecting residual toner on a photoreceptor is connected by a toner-transporting pipe to a toner-pouring device of a developing unit, in the case of which a mesh-like foreign-body collector is provided which is made to oscillate, is arranged in a location in a residual-toner collecting branch which extends from the cleaning section via the toner-transporting pipe up to the toner-pouring device.

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