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31. 发明专利

JPH0211159B2 失效
公开(公告)号：JPH0211159B2
公开(公告)日：1990-03-13
申请号：JP14470082
申请日：1982-08-23
申请人： HITACHI SEISAKUSHO KK , HITACHI KOKI KK
发明人： KOMATSU ISAMU , ANZAI MASAYASU , HOSHI NOBUYOSHI , AKIMARU SUSUMU
IPC分类号： G03G15/01 , G03G15/08

32. 发明专利

JPH0115871B2 失效
公开(公告)号：JPH0115871B2
公开(公告)日：1989-03-20
申请号：JP8475179
申请日：1979-07-03
申请人： HITACHI SEISAKUSHO KK , HITACHI KOKI KK , NIPPON DENSHIN DENWA KK
发明人： SAWADA HIROTSUGU , KOMATSU ISAMU , ANZAI MASAYASU , NIINUMA KYOSHI , FUJIMOTO ISAO , NISHIMURA KUNITOSHI
IPC分类号： G03G15/08

33. 发明专利

JPS6352164A MAGNETIC BRUSH DEVELOPING DEVICE 失效
公开(公告)号：JPS6352164A
公开(公告)日：1988-03-05
申请号：JP19772386
申请日：1986-08-21
申请人： HITACHI KOKI KK
发明人： AKINAGA KATSUHIRO , KIKUCHI YASUO , KOMATSU ISAMU , OUCHI HIROBUMI , HIROSE YOJI
IPC分类号： G03G15/09
摘要： PURPOSE:To prevent the sticking of toner to the surface of a magnet so as to maintain picture qualities in excellent states, by providing a magnetic member at a position which is separated from the peripheral surface of a sleeve by a fixed distance in such a state that the member is faced to magnetic poles provided inside a fixed magnet roll. CONSTITUTION:A magnetic member 6 is provided at a position which is separated from the peripheral surface of a sleeve 5 by a fixed distance in such a state that the member is faced to magnetic poles 4 provided inside the fixed magnet roll of a magnet roll. The toner sticking to the surface of the sleeve 5 is separated from the sleeve 5 and carried by carriers 1 by the slide-contacting force, between the magnetic brush of a developing agent formed by the magnetic poles 4 and member 6 and carriers 1 due to slippage and electrostatic attraction between the toner 2 and carrier 1. Therefore, the sticking of toner to the surface of the sleeve 5 can be prevented and the toner carrying and developing conditions can be stabilized, thereby resulting in excellent picture qualities.

34. 发明专利

JPS5947246B2 JPS5947246B2 - 失效
公开(公告)号：JPS5947246B2
公开(公告)日：1984-11-17
申请号：JP2204878
申请日：1978-03-01
申请人： Hitachi Seisakusho Kk , Hitachi Koki Kk
发明人： KOMATSU ISAMU , ANZAI MASAYASU
IPC分类号： G01F23/22

35. 发明专利

JPS5930271B2 JPS5930271B2 - 失效
公开(公告)号：JPS5930271B2
公开(公告)日：1984-07-26
申请号：JP8474879
申请日：1979-07-03
申请人： Hitachi Seisakusho Kk , Hitachi Koki Kk , Nippon Denshin Denwa Kosha
发明人： KOMATSU ISAMU , ANZAI MASAYASU , SAWADA HIROTSUGU , NIINUMA KYOSHI , FUJIMOTO ISAO , NISHIMURA KUNITOSHI
IPC分类号： G03G15/08 , G03G15/09

36. 发明专利

JPS5825214B2 失效
公开(公告)号：JPS5825214B2
公开(公告)日：1983-05-26
申请号：JP337878
申请日：1978-01-18
申请人： HITACHI SEISAKUSHO KK , HITACHI KOKI KK
发明人： KOMATSU ISAMU , ANZAI MASAYASU
IPC分类号： G01F23/22

37. 发明专利

JP2927808B2 失效
公开(公告)号：JP2927808B2
公开(公告)日：1999-07-28
申请号：JP30684488
申请日：1988-12-06
申请人： HITACHI SEISAKUSHO KK , HITACHI KOKI KK
发明人： UMEDA TAKAO , MYASAKA TOORU , NAMIKAWA OSAMU , KOMATSU ISAMU
IPC分类号： G03G15/00 , G03G15/02 , G03G21/00

38. 发明专利

JPH01316768A ELECTROPHOTOGRAPHIC DEVELOPING DEVICE 失效
公开(公告)号：JPH01316768A
公开(公告)日：1989-12-21
申请号：JP15043988
申请日：1988-06-17
申请人： HITACHI KOKI KK
发明人： OTOME YUKIO , OZAWA HIROOMI , KOMATSU ISAMU , HIROSE YOJI , OYAMA MINEO
IPC分类号： G03G15/09 , G03G15/08
摘要： PURPOSE:To enable exact detection of a mixing ratio of a toner and a carrier by providing a collecting member for collecting a developer on the conveying route of the developer using a magnetic roll, and arranging the detection site at the end of the detector of said ratio under the collected developer. CONSTITUTION:The collecting member 10 is arranged on a scraping plate 5 for scraping down the remaining developer on the magnetic roll 4, and the developer flowing along the plate 5 is collected with the member 10, and the detecting site 6A at the end of the detector 6 is arranged under the collected developer, thus permitting the developer to have a sufficient thickness at the detection site 6A, and accordingly, the mixing ratio of the toner and the carrier to be obtained at high precision without causing any detection error.

39. 发明专利

JPS6377069A BIAS DEVELOPING DEVICE 失效
公开(公告)号：JPS6377069A
公开(公告)日：1988-04-07
申请号：JP22269886
申请日：1986-09-19
申请人： HITACHI KOKI KK
发明人： KOMATSU ISAMU , KIKUCHI YASUO , OUCHI HIROBUMI , HIROSE YOJI , AKENAGA KATSUHIRO , OYAMA MINEO
IPC分类号： G03G15/06
摘要： PURPOSE:To perform excellent bias development at all times by detecting a current which flows through a developer layer with constant thickness by a bias voltage at all times and controlling the bias voltage so that the current has a desired current value. CONSTITUTION:A developer is attracted and conveyed by a magnetic roll 4 and passes between an electrode member 7 and the magnetic roll 4 and is controlled by a shaping member 5 to a prescribed conveyance quantity, thereby developing an electric latent image on a photosensitive drum 12 by the bias voltage 8 which is applied to the magnetic roll 4 and has the same polarity with toner electrostatic charging polarity. A current which flows to the electrode member 7 is detected and compared with an optional reference voltage 8 by a comparing device 10 to control the bias voltage 8 with the comparison output so that the current has an optional constant value. Consequently, a bias development effect is made constant and printing of excellent quality is carried out continuously with constant print density.

40. 发明专利

JPS60257465A MAGNETIC BRUSH DEVELOPING DEVICE 失效
公开(公告)号：JPS60257465A
公开(公告)日：1985-12-19
申请号：JP11359384
申请日：1984-06-01
申请人： HITACHI KOKI KK
发明人： KOMATSU ISAMU , MATSUDA KOUICHI , UNO KAZUO
IPC分类号： G03G15/09 , G03G21/00
摘要： PURPOSE:To improve the efficiency of cleaning of the surface of a photosensitive body using a magnetic brush by extending the width of contacting between the magnetic brush and the photosensitive body. CONSTITUTION:A developer 2 consisting of a carrier and a toner is carried by a nonmagnetic sleeve 4 rotated around the outside peripheral part of a magnetic roll 3 where plural magnetic poles are provided cylindrically. A gap (d) between the nonmagnetic sleeve 4 and a control member 5 which can set variably this gap (d) to optional larger and smaller values is set to the smaller value, and the quantity of the carried developer 2 is controlled and is made uniform in this state, and the developer 2 is carried to a developing magnetic pole 7 in the position facing a photosensitive body 6 which is set a gap l apart from the nonmagnetic sleeve 4, and the developer 2 is crested to a brush shape there and rubs lightly an electrostatic latent image on the photosensitive body 6 to develop this image. When the cleaning function of the surface of the photosensitive body 6 is used, the control member 5 is set variably to set the gap (d) to the larger value, and the gap (d) is made equal to or wider than the gap l, and the developer 2 is carried for a certain period similarly to development in the state where the electrostatic latent image is not formed on the photosensitive body 6. Since the width of contacting between the developer 2 and the surface of the photosensitive body 6 is extended to increase the rubbing force, the cleaning effect of the surface of the photosensitive body 6 is improved.

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