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21. 发明专利

JP2003122114A TONER REPLENISHMENT DEVICE 审中-公开
公开(公告)号：JP2003122114A
公开(公告)日：2003-04-25
申请号：JP2001321587
申请日：2001-10-19
申请人： HITACHI KOKI KK
发明人： KUROHANE TOMOSHIGE , MIWA MASATO
IPC分类号： G03G15/08 , B65D83/06 , F16J15/18
摘要： PROBLEM TO BE SOLVED: To provide a toner replenishment device in which smooth slide attachment/detachment of a toner cartridge to/from a toner hopper can be performed and the prevention of a leak of toner from the toner cartridge or toner hopper can be prevented by means of an extremely simple and inexpensive structure, in a toner replenishment device for an electrophotographic laser beam printer in which the toner cartridge is set on the toner hopper by being slid. SOLUTION: A sealing member provided in the periphery of the opening of the toner hopper is made a double-structure formed of a resin sheet and sponge. The periphery of the opening, particularly, the edges of the opening in the direction where the toner cartridge and a slidable lid are slid are formed by extending and rounding the resin sheet.

22. 发明专利

JP2002040789A DEVELOPING DEVICE 失效
公开(公告)号：JP2002040789A
公开(公告)日：2002-02-06
申请号：JP2000228129
申请日：2000-07-28
申请人： HITACHI KOKI KK
发明人： KUROHANE TOMOSHIGE , MIWA MASATO , NISHINO OSAMU
IPC分类号： G03G15/08
摘要： PROBLEM TO BE SOLVED: To provide a developing device with little soiling when carrying out maintenance and the image quality is stable with a simple and low cost constitution by preventing sticking of toner to a guiding wall that is provided for replenish the toner to its regular position when the toner is replenished from a toner hopper part to a developing part in the developing device of a laser beam printer utilizing an electrophotographic method. SOLUTION: In the developing device, oscillation of a scraper for scraping off the toner from a rotating roll with grooves for toner replenishing the toner when it is passed over the groove is paid with attention and an oscillating plate making use of the oscillating force is provided.

23. 发明专利

JP2001343851A HEAT ROLL AND ELECTROPHOTOGRAPHIC DEVICE USING THE SAME 失效
公开(公告)号：JP2001343851A
公开(公告)日：2001-12-14
申请号：JP2000164162
申请日：2000-06-01
申请人： HITACHI KOKI KK
发明人： NISHINO OSAMU , MIWA MASATO , TAKESHITA MASAMI
IPC分类号： G03G15/20 , F16C13/00 , H05B3/00
摘要： PROBLEM TO BE SOLVED: To make the surface temperature of a heat roll at the time of printing uniform by an inexpensive method in order to improve printing quality in the fixing part of a laser beam printer utilizing an electrophotographic system. SOLUTION: By using two kinds of material having a different heat transfer coefficient and using the material having the higher heat transfer coefficient for a part to fix toner while coming into contact with paper, the heat transfer in the longitudinal direction of the heat roll is made smooth. By using the material having the lower heat transfer coefficient for bearing attaching parts at both ends of the heat roll, the escape of the heat to the frame of the fixing part is reduced.

24. 发明专利

JP2000185863A IMAGE FORMING DEVICE 失效
公开(公告)号：JP2000185863A
公开(公告)日：2000-07-04
申请号：JP36058298
申请日：1998-12-18
申请人： HITACHI KOKI KK
发明人： HASHIMOTO YASUSHI , TERAKADO AKIRA , MIWA MASATO
IPC分类号： B65H29/58 , B65H29/70
摘要： PROBLEM TO BE SOLVED: To certainly prevent inversion of a sheet by providing a sheet guide that is placed curved or bent on the opposite side of a side having an inversion passage in a retract passage in the downstream in the sheet transportation direction, and straightens a curl of the sheet. SOLUTION: A retract passage 19 branches away from an inversion passage 22 at a sheet guide end E1 upstream P1. The retract passage bends at a point E2 at distance S downstream from P1, by cross angle θ less than 40 deg. in relation to a transportation surface upstream P1 in the opposite direction of the inversion passage 22, and is connected, at a point E3, with a transportation surface moved by a distance D from the transportation surface upstream P1. Because the attitude of a sheet Y is positively regulated in the opposite direction to the curl through sheet guide portions E2, E3, E4 of the retract passage 19, in the routes E2, E3, E4, deflection angles occur on the sheet in the opposite direction to the curl direction. As a result, sheet end upstream of E2 directs the inversion passage 22 side by the deflection angle generated at the point E2 when separates from the point E1.

25. 发明专利

JP2954812B2 失效
公开(公告)号：JP2954812B2
公开(公告)日：1999-09-27
申请号：JP14217293
申请日：1993-06-14
申请人： HITACHI KOKI KK , HITACHI SEISAKUSHO KK
发明人： UMEDA TAKAO , KAWAI KATSUYA , SAITO YOSUKE , MABUCHI HIROYUKI , ANZAI MASAYASU , MIWA MASATO , SUZUKI TAKASHI , MITSUYA TERUAKI , TAKUMA YASUO
IPC分类号： G03G15/00 , G03G15/16 , G03G21/00 , G03G21/10

26. 发明专利

JPH07230220A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH07230220A
公开(公告)日：1995-08-29
申请号：JP2106194
申请日：1994-02-18
申请人： HITACHI KOKI KK
发明人： UMEDA TAKAO , MABUCHI HIROYUKI , SAITO YOSUKE , ANZAI MASAYASU , SUZUKI TAKASHI , MIWA MASATO
IPC分类号： G03G15/16 , G03G15/00
摘要： PURPOSE:To prevent scatter of toner during, before and after transfer, formation of a filming layer on the surface of a transfer belt, contamination inside a device, and soiling of the heat roller and backup roller of a fixing device, in an image forming device employing a belt transfer system. CONSTITUTION:The lower roller 7b of a pair of regist rollers is made of metal, the rotary shaft of the roller is grounded, the roller is driven following the other to carry paper 6, after passing the regist rollers, to the transfer belt 8 while preventing the electrification of the rear surface of the paper 6. A control circuit 15 receives a signal from a paper-thickness sensor 16. When the paper 6 is thick, it transmits control signals to the drive power source 22 of an exposure device 3 and the operation circuit 14 of a developing device 4, thereby reducing exposure intensity, a development bias voltage, and the circumferential speed of a developing roll, and controlling an amount of development toner.

27. 发明专利

JPH0792827A TRANSFER DEVICE 失效
公开(公告)号：JPH0792827A
公开(公告)日：1995-04-07
申请号：JP23674493
申请日：1993-09-22
申请人： HITACHI KOKI KK
发明人： SAITO YOSUKE , UMEDA TAKAO , ANZAI MASAYASU , MABUCHI HIROYUKI , ASAI SHINJI , KIKUCHI YASUO , MIWA MASATO
IPC分类号： G03G15/16 , G03G21/00 , G03G21/10
摘要： PURPOSE:To provide a transfer device provided with a cleaning mechanism capable of stably maintaining the cleaning state of a transfer material over a long period compared with a conventional one, when toner remaining on the transfer material of a transfer belt, an intermediate transfer body, etc., is cleaned off. CONSTITUTION:For example, the high voltage (high voltage from a high voltage power source 15) of a polarity (positive) opposite to the polarities of the charges of the toner and a photosensitive body 1 is applied to a discharger 15 provided in the vicinity of a driving member 12 driving the transfer belt 6 and the toner remaining on the transfer belt 6 passes through the discharger 15 to turn the polarity of the toner into the positive one. The toner whose polarity is changed into the positive one is moved to the side of the photoreceptor 1 and removed by a cleaner 11 at the time of coming into contact with the photoreceptor 1 next.

28. 发明专利

JPH06298383A PAPER SHEET STORAGE DEVICE FOR ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH06298383A
公开(公告)日：1994-10-25
申请号：JP9012193
申请日：1993-04-16
申请人： HITACHI KOKI KK
发明人： YAMAZAKI AKIHIKO , SHIRAKAWA JUNJI , MIWA MASATO , HAYAKAWA MITSUAKI , SHIRAISHI TATSUYA
IPC分类号： B65H1/26 , G03G15/00
摘要： PURPOSE:To fold a container very small, prevent the occurrence of the wasteful space when the container is not used, and save the space by providing side plates of the container foldably inward, and providing the inward folded side plates foldable on the bottom member of the container. CONSTITUTION:Junctions connecting side plates 1a, 1b, 1c, 1d and a bottom box 2 are removed to release the side plates 1a, 1b, 1c, 1d. The side plates 1a, 1b are overlapped on a side plate 5 via rotary hinges 4, and the side plates 1c, 1d are overlapped on a side plate 6. The side plate 5 and the side plate 6 are rotated via rotary hinges 7, and the bottom box 2 is overlapped on the bottom face. The side plates 1a, 1b, 1c, 1d constituting a folding container are folded inward, then they are mounted on the bottom box 2 within the area of the bottom box 2. The occurrence of the wasteful space is prevented when the container is not used, i.e., during storage or transportation, and the stability when the containers are stacked is improved.

29. 发明专利

JP2003122134A TRANSFER DEVICE 审中-公开
公开(公告)号：JP2003122134A
公开(公告)日：2003-04-25
申请号：JP2001314965
申请日：2001-10-12
申请人： HITACHI KOKI KK
发明人： SAITO YOSUKE , MIWA MASATO , NISHINO OSAMU , MATSUDA TATSUO , NISHINO YASUHIKO , NAKAMURA TAKASHI
IPC分类号： G03G21/14 , G03G15/00 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To solve such a problem of the electrophotographic device of a transfer belt system that, because a transfer belt is always in contact with a photoreceptor belt during printing, toner, or so-called fog, on the photoreceptor accumulates on a fixing machine from the transfer belt via a sheet of paper, resulting that the back of the sheet of paper is soiled. SOLUTION: In the transfer device in which a sheet of paper separated from the transfer belt is discharged by a static eliminator disposed opposite to the drive roller of the transfer belt to which a bias voltage is applied, a flow-in current varying means is provided in order that a current flowing in the drive roller from the discharger is varied during paper passage and during paper non-passage.

30. 发明专利

JP2002258655A CLEANING DEVICE FOR FIXING DEVICE 失效
公开(公告)号：JP2002258655A
公开(公告)日：2002-09-11
申请号：JP2001057551
申请日：2001-03-02
申请人： HITACHI KOKI KK
发明人： SAKABA EITA , TAKESHITA MASAMI , MIWA MASATO , NISHINO OSAMU
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To easily detect the trailing end of a web without being influenced by the sensitivity of a sensor in a cleaning device for a fixing device. SOLUTION: A notch is provided at a detecting position by the sensor on a shaft round which an unused web is wound. When the trailing end of the web comes and the web is depleted, the sensor measures the diameter of the notched part and the value of the diameter is largely fluctuated. Therefore, output from the sensor is largely fluctuated, and a situation that the trailing end of the web comes is easily detected without being influenced by the sensitivity of the sensor.

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