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1. 发明专利

JPS60154262A DEVICE FOR REMOVING UNNECESSARY TONER IN ELECTROPHOTOGRAPHY 失效
公开(公告)号：JPS60154262A
公开(公告)日：1985-08-13
申请号：JP1009984
申请日：1984-01-25
申请人： HITACHI LTD , HITACHI KOKI KK
发明人： AKIMARU SUSUMU , ANZAI MASAYASU , HOSHI NOBUYOSHI , INADA YOUJI
IPC分类号： G03G15/01 , G03G15/08 , G03G15/09
摘要： PURPOSE:To prevent fog or color mixing by separating and removing a toner electrostatically charged to unnecessary polarity with an electric field applied to a conductive fur brush. CONSTITUTION:The first toner 5 is charged positively inside the first developing device 4, but when it is mixed into the second developing device 7, it is reversed in charge to negative polarity by friction with the second toner 8 positively charged. A toner separator comprises a suction casing 12 and a conductive brush 13 installed in it near a sleeve 10 or in contact with it. For example, 500V voltage 14a is applied to the brush 13, and only the toner 5 reversed negatively of both toners 5, 8 is attached to the brush 13 and removed with suction air through the suction opening of the casing 12. As a result, fog or color mixing can be prevented.

2. 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

3. 发明专利

JPH096107A DEVELOPING DEVICE 失效
公开(公告)号：JPH096107A
公开(公告)日：1997-01-10
申请号：JP15435095
申请日：1995-06-21
申请人： HITACHI LTD
发明人： ONOSE ATSUSHI , AONO YOSHINORI , AKIMARU SUSUMU , KUMADA KATSUMI , MIKAMI KATSUMASA , TAKEYA MASAHARU
IPC分类号： G03G15/01 , G03G15/08 , G03G15/09
摘要： PURPOSE: To accelerate a color imaging speed by shortening the time required for recovering developer and made to be long because of the localization of the developer and accelerating the switching operation of developing. CONSTITUTION: A developing slit by shutters 6 and 7 is provided between a developer container 1 and a developer carrier 10. By arranging the developing slit inclinedly according to the localization of the developer, the equal quantity of developer can be attached to the carrier 10. Therefore, the developer is uniformly supplied and uniformly eliminated in the longitudinal direction in accordance with the rotation of the carrier 10. Besides, the developer can be eliminated from a developing part immediately after the developing is finished and it is not mixed with the developer of the other color. Since the developer can be eliminated from the developing part immediately after the developing is finished, the developing can be quickly switched. Besides, time required for the developing is shortened and the color imaging speed is accelerated.

4. 发明专利

JPH08194380A DEVELOPING DEVICE 失效
公开(公告)号：JPH08194380A
公开(公告)日：1996-07-30
申请号：JP619195
申请日：1995-01-19
申请人： HITACHI LTD
发明人： ONOSE ATSUSHI , AKIMARU SUSUMU , AONO YOSHINORI
IPC分类号： G03G15/09 , G03G15/08
摘要： PURPOSE: To provide a developing machine capable of instantaneously choosing development or nondevelopment at a low load. CONSTITUTION: In this image forming device provided with a magnet roll 3 in a developing sleeve 4, the developing sleeve 4 having a partial difference in the distance between the axial center of the magnet roll 3 and the surface of the developing sleeve 4 is used and a driving means for rotating or moving the sleeve 4 is provided, to change the distance between a photoreceptor 6 and the surface of the sleeve 4. Therefore, the surface of the developer carrier (developing sleeve) 4 carrying the developer is moved to attain the contact and uncontact of the developer with an image carrier. Thus, the developing machine capable of instantaneously choosing the development or the nondevelopment at the low load can be provided.

5. 发明专利

JPH041907B2 失效
公开(公告)号：JPH041907B2
公开(公告)日：1992-01-14
申请号：JP1961582
申请日：1982-02-12
申请人： HITACHI LTD
发明人： KOMATSU ISAMU , ANZAI MASAYASU , HOSHI NOBUYOSHI , AKIMARU SUSUMU
IPC分类号： G03G13/01 , G03G15/01

6. 发明专利

JPS58189658A Two-color developing method 失效
标题翻译：双色发展方法
公开(公告)号：JPS58189658A
公开(公告)日：1983-11-05
申请号：JP7116182
申请日：1982-04-30
申请人： Hitachi Ltd
发明人： HOSHI NOBUYOSHI , KOMATSU ISAMU , AKIMARU SUSUMU , ANZAI MASAYASU
IPC分类号： G03G13/01 , G03G15/01
CPC分类号： G03G13/013
摘要： PURPOSE:To obtain a clear two-color picture free of color mixing, by making the mass of the 1st toner less than that of the 2nd toner, and scattering the 1st toner mixed with the 2nd toner far away and separating it from the 2nd toner. CONSTITUTION:The 1st toner 5 is carried on the surface of a conveyance sleeve 11 together with the 2nd toner 8 and a developer 9 consisting of a carrier, scooped up to the surface of the sleeve 12, and carried. A small-diameter sleeve 15 rotates faster than the sleeve 12 in inverse proportion to the diameter ratio to the sleeve 12 in order to specify the carried amount of the developer 9, and the toner scatters from the developer 9 striking the sleeve 15. The toner 5 has the mass several times as small as that of the toner 8 and the toner 5 flies farther away from the sleeve 15 than the toner 8. Thus, the clear two-color picture free of color mixing is obtained.
摘要翻译：目的：为了获得无色混合的清晰双色图像，通过使第一调色剂的质量小于第二调色剂的质量，并将与第二调色剂混合的第一调色剂远离第二调色剂并将其与第二调色剂分离。构成：第一调色剂5与第二调色剂8一起承载在输送套筒11的表面上，以及由载体构成的显影剂9，该显影剂9被舀到套筒12的表面上并携带。为了指定显影剂9的承载量，并且调色剂从显影剂9撞击到套筒15上而使小直径套筒15比与套筒12的直径比成反比例比套筒12旋转得更快。调色剂 5的质量比调色剂8的质量小几倍，并且调色剂5比调色剂8远离套筒15飞行。因此，获得了没有混色的透明双色图像。

7. 发明专利

JPS58137846A TWO-COLOR DEVELOPING METHOD 失效
公开(公告)号：JPS58137846A
公开(公告)日：1983-08-16
申请号：JP1961582
申请日：1982-02-12
申请人： HITACHI LTD
发明人： KOMATSU ISAMU , ANZAI MASAYASU , HOSHI NOBUYOSHI , AKIMARU SUSUMU
IPC分类号： G03G13/01 , G03G15/01
摘要： PURPOSE:To execute 2-color development exhibiting no color mixing, by changing an amt. of the first toner to be charged by mutual electrostatic action of the second toner attached to a carrier and the first toner mixed with this. CONSTITUTION:The first electrostatic latent image formed on a recording material 1 by exposure to rays 3 is reversely developed with the first toner 5 contained in a developing device 4. The second latent image formed with rays 6 is reversely developed with the second toner different in color contained in a developing device 7. Since the surface of the recording material 1 is rubbed with the magnetic brush of a 2-component type developer in developing the second image with the toner 8, the toner 5 is partially scraped off and mixed into the developer in the device 7. Charge of the toner 5 become about zero to a negative polarity by interaction of the toner 8, attracted with an opposite electrode charged positively or to recording paper and removed, and therefore, a sharp 2-color image having no color mixing is obtained.

8. 发明专利

JPH10228181A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH10228181A
公开(公告)日：1998-08-25
申请号：JP3003597
申请日：1997-02-14
申请人： HITACHI LTD
发明人： AONO YOSHINORI , AKIMARU SUSUMU , TOKORO NOBUO , OKAMOTO KENICHI
IPC分类号： G03G21/00 , G03G15/01 , G03G15/16
摘要： PROBLEM TO BE SOLVED: To prevent the transfer of toner stuck to a non-image part to an intermediate transfer body and to obtain high image quality by applying a opposite polarity of an electric charge to that of the toner to a toner image on an image carrier, before the toner stuck on the image carrier is transferred to the intermediate transfer body. SOLUTION: A negative charge is uniformly applied to a photoreceptor 1 by a scorotron electrifier 2 connected to a negative voltage source. A developer is carried to the surface of the photoreceptor 1 by the rotation of the developing roll of a developing device. A negative developing bias voltage is applied to the developing roll and the toner is stuck to the surface of the photoreceptor 1, to make an electrostatic latent image visualizable. At this time, an electrifier 5 connected to a positive voltage source uniformly applies a positive charge, the opposite polarity to that of the toner, to all the toner. The value of the electrified quantity of the toner stuck to the non-image part is drastically changed when the charge is applied and the attracting force of the toner whose polarity is changed to the photoreceptor 1 becomes strong to prevent the transfer of the toner to an intermediate transfer drum 6.

9. 发明专利

JPH08202166A ELECTROPHOTOGRAPHIC DEVICE 失效
公开(公告)号：JPH08202166A
公开(公告)日：1996-08-09
申请号：JP793195
申请日：1995-01-23
申请人： HITACHI LTD
发明人： AKIMARU SUSUMU , AONO YOSHINORI , ONOSE ATSUSHI , KUMADA KATSUMI
IPC分类号： G03G15/09 , G03G15/08
摘要： PURPOSE: To provide a small-sized developing device capable of printing with high accuracy and high definition. CONSTITUTION: The developing device 1 is provided with a gap control member 9 installed above a photoreceptor belt 10 and installed inside the photoreceptor belt 10 and a gap controlling roller installed on both sides of a developing roller 2, and by pressing the gap control member 9 against the gap controlling roller, an interval between the developing roller 2 and the photoreceptor belt 10 is set

10. 发明专利

JPH07295322A COLOR IMAGE FORMING DEVICE 失效
公开(公告)号：JPH07295322A
公开(公告)日：1995-11-10
申请号：JP8817194
申请日：1994-04-26
申请人： HITACHI LTD
发明人： AONO YOSHINORI , AKIMARU SUSUMU , MIYASAKA TORU
IPC分类号： G03G15/01 , G03G15/08
摘要： PURPOSE:To sufficiently secure the stirring time of developer and to obtain a high-quality image even when a developing device is miniaturized by separately arranging the developing device and a toner replenishment means by using a toner carrying means and making the toner carrying means from a metallic pipe. CONSTITUTION:The developer for developing an electrostatic latent image is housed in a developer container 1, uniformly carried inside the container by the rotation of a carrying screw 2 and supplied to a developing roll 3. When toner is consumed and the concentration thereof becomes thin, it is detected by a toner concentration detector 4 and transmitted to the toner cartridge driving means of a toner cartridge 5 as an electric signal. Then, a stirring blade 6 is actuated. By the rotation of the blade 6, the toner housed in the cartridge 5 is stirred and sent to a toner carrying pipe 7. Since the pipe 7 is a metallic pipe, the desired electrostatic charge quantity of the toner is obtained while the toner is carried toward the container 1 by the triboelectrification of the toner and the pipe 7.

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