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公开(公告)号：US5659861A
公开(公告)日：1997-08-19
申请号：US623298
申请日：1996-03-28
CPC分类号： G03G15/0921 , G03G13/09
摘要： A method for developing electrostatic latent image on a rotating photoconductive drum by a magnetic developer transported by a rotating developing roll disposed opposite to the photoconductive drum, the developing roll being made of a cylindrical permanent magnet having on circumferential surface thereof equispaced magnetic poles extending along the axial direction. In the method the magnetic poles are equispaced by an inter-pole pitch of 0.5-10 mm, the photoconductive drum and the developing roll are rotated so as to move in opposite directions in an developing zone, and the ratio of peripheral speeds of the developing roll and photoconductive drum are regulated within 1 to 5. By the above method, an electrophotographic imaging apparatus can be reduced in the size thereof while reproducing high-quality images.
摘要翻译： 一种通过由与感光鼓相对设置的旋转显影辊输送的磁性显影剂在旋转感光鼓上显影静电潜像的方法，显影辊由圆柱形永久磁铁制成，其圆周表面具有沿着 轴向。 在该方法中，磁极间距为0.5-10mm的间极间距，使感光鼓和显影辊旋转以便在显影区域中沿相反方向移动，并且显影区域的圆周速度比 辊和感光鼓在1至5之间调节。通过上述方法，可以在再现高质量图像的同时减小电子照相成像装置的尺寸。
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公开(公告)号：US5900343A
公开(公告)日：1999-05-04
申请号：US905956
申请日：1997-08-05
申请人： Masahisa Ochiai , Masumi Asanae , Tsutomu Saitoh
发明人： Masahisa Ochiai , Masumi Asanae , Tsutomu Saitoh
IPC分类号： G03G9/107
CPC分类号： G03G9/107
摘要： An Li--Mn type ferrite carrier for use in electrophotographic development comprising ferrite particles having a chemical composition of 3 to 15% of Li.sub.2 O, 5 to 35% of MnO and 60 to 90% of Fe.sub.2 O.sub.3, each in terms of percent by mole. The ferrite particles consisting essentially of crystal grains having an average grain size of 1 to 50 .mu.m. The surface of the crystal grains is provided with a minute roughness or unevenness during the production of the ferrite carrier. The minute roughness on the grain surface enhances the ability of the ferrite carrier to triboelectrically charge the toner and the bonding strength of the resin coating to the carrier surface.
摘要翻译： 一种用于电子照相显影的Li-Mn型铁氧体载体，其包含化学组成为Li 2 O 3〜15％，MnO 5〜35％，Fe 2 O 3 60〜90％的铁氧体颗粒。 铁素体颗粒基本上由平均粒径为1至50μm的晶粒组成。 在制造铁氧体载体时，晶粒表面具有微小的粗糙度或不均匀性。 颗粒表面上的微小粗糙度增强了铁氧体载体对调色剂进行摩擦电荷的能力以及树脂涂层与载体表面的粘结强度。
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公开(公告)号：US5731121A
公开(公告)日：1998-03-24
申请号：US711743
申请日：1996-09-10
申请人： Masumi Asanae , Akihiko Funakawa , Masahisa Ochiai
发明人： Masumi Asanae , Akihiko Funakawa , Masahisa Ochiai
CPC分类号： G03G9/08797 , G03G9/083 , G03G9/0833 , G03G9/09708 , G03G9/09725 , G03G9/09791
摘要： A developer for developing an electrostatic latent image by a developing method of a type in which residual toner particles on an image-bearing member are recovered therefrom and reused for developing the electrostatic latent image, which comprises a magnetic toner and a magnetic carrier. The magnetic toner comprises a binder resin having a number average molecular weight of 2,000-100,000, a weight average molecular weight of 5,000-500,000, and a melt viscosity of 10.sup.5 P or less at 120.degree. C., a release agent having a softening point of 160.degree. C. or lower; and a magnetic powder. The magnetic toner particle is externally added on a surface thereof or internally added thereto with a surface treating agent comprising a fine powder of at least one metal salt of stearic acid, a fine powder of at least one inorganic oxide and an optional resin powder.
摘要翻译： 用于通过显影方法显影静电潜像的显影剂，其中图像承载部件上的残留调色剂颗粒从其中回收并重新用于显影静电潜像，其包括磁性调色剂和磁性载体。 磁性调色剂包括数均分子量为2,000-100,000，重均分子量为5,000-500,000，熔点粘度在120℃时为105P或更低的粘合剂树脂，具有软化点的脱模剂 160℃以下; 和磁粉。 磁性调色剂颗粒在其表面外部加入或内部添加有表面处理剂，其包含至少一种硬脂酸金属盐，至少一种无机氧化物的细粉末和任选的树脂粉末的细粉末。
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4.发明授权Method of forming image using magnetic developer with high volume resistivity 失效使用具有高体积电阻率的磁性显影剂形成图像的方法
公开(公告)号：US5565967A
公开(公告)日：1996-10-15
申请号：US498603
申请日：1995-07-06
申请人： Masahisa Ochiai , Tsutomu Saitoh , Masumi Asanae
发明人： Masahisa Ochiai , Tsutomu Saitoh , Masumi Asanae
CPC分类号： G03G15/0921 , G03G13/09 , G03G9/10
摘要： An image forming method includes the steps of charging a surface of a movable image-bearing member uniformly by using a roller charging means, forming an electrostatic latent image on the image-bearing member by carrying out an image exposure, delivering a magnetic developer which is attracted onto a surface of a sleeveless permanent magnetic member to a developing region located opposite to the electrostatic latent image formed on the image-bearing member, the sleeveless permanent magnetic member being formed with a plurality of magnetic poles provided on its surface and having a cylinder shape, developing the electrostatic latent image using the magnetic developer comprising a toner and magnetic carriers, the magnetic carriers having a volume resistivity of 10.sup.10 .OMEGA..cm or more, and transferring a toner image onto a transfer sheet by using a roller transfer means.
摘要翻译： 图像形成方法包括以下步骤：通过使用辊充电装置均匀地对可移动图像承载部件的表面进行充电，通过进行图像曝光在图像承载部件上形成静电潜像，输送磁性显影剂， 被吸引到位于与图像承载部件上形成的静电潜像相对的显影区域的无袖永磁部件的表面上，无磁永磁部件形成有设置在其表面上的多个磁极，并且具有圆筒 形状，使用包括调色剂和磁性载体的磁性显影剂显影静电潜像，磁性载体的体积电阻率为1010ΩEG·cm以上，并通过使用辊转移装置将调色剂图像转印到转印片材上。
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公开(公告)号：US5532095A
公开(公告)日：1996-07-02
申请号：US294968
申请日：1994-08-24
CPC分类号： G03G9/0823 , G03G9/0833 , G03G9/0835 , G03G9/0819 , Y10S430/104
摘要： A magnetic toner includes at least binding resin (for instance, a styrene-acryl resin) and magnetic powder (for instance, Mn--Zn ferrite or Ni--Zn ferrite) having a saturation magnetization of at least 50 emu/g and a coercive force as measured under the magnetic field of 10 kOe not exceeding 50 Oe. An image formed by using this magnetic toner has high quality and is free of tailing.
摘要翻译： 磁性调色剂至少包含粘结树脂（例如苯乙烯 - 丙烯酸树脂）和饱和磁化强度至少为50emu / g的磁性粉末（例如Mn-Zn铁氧体或Ni-Zn铁氧体）和矫顽力 在10kOe的磁场下测量不超过50Oe。 通过使用该磁性调色剂形成的图像具有高品质并且没有拖尾。
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公开(公告)号：US5554479A
公开(公告)日：1996-09-10
申请号：US356064
申请日：1994-12-14
申请人： Masahisa Ochiai , Masumi Asanae
发明人： Masahisa Ochiai , Masumi Asanae
CPC分类号： G03G9/08 , G03G15/0921 , G03G9/10
摘要： An image forming method for conveying a magnetic developer 70 held on the surface of a developer conveying member 40 opposed to a image-bearing member 30 to a developing region to develops electrostatic latent images, comprises implementing as the developer conveying member 40 a semiconductive or an insulating cylindrical magnet with a plurality of heteropolar magnet poles arranged alternatively on its surface, the overall magnet being integrally formed, rotating the developer conveying member 40 to convey the magnetic developer 70 to the developing region, and using the magnetic developer 70 conveyed to the developing region to develop electrostatic bearing member latent images formed on the image-bearing member 30.This constitution allows an inexpensive sleeveless roll magnet to be used to obtain high-quality images.
摘要翻译： 用于将保持在与图像承载部件30相对的显影剂传送部件40的表面上的磁性显影剂70传送到显影区域以形成静电潜像的图像形成方法包括将显影剂传送部件40实施为半导体或 具有多个在其表面上交替布置的多极磁极的绝缘圆柱形磁体，整体磁体一体形成，使显影剂传送构件40旋转以将磁性显影剂70输送到显影区域，并使用传送到显影区域的磁性显影剂70 以形成形成在图像承载部件30上的静电承载部件潜像。这种结构允许使用便宜的无袖卷轴磁体来获得高质量的图像。
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公开(公告)号：US5547795A
公开(公告)日：1996-08-20
申请号：US492866
申请日：1995-06-20
申请人： Masahisa Ochiai , Tsutomu Saitoh , Masumi Asanae
发明人： Masahisa Ochiai , Tsutomu Saitoh , Masumi Asanae
CPC分类号： G03G9/107 , G03G9/113 , G03G9/1133 , G03G9/1135 , G03G9/1136 , G03G2215/0609
摘要： A magnetic carrier for a developer for use in electrophotographic recording, comprising a ferromagnetic particle of an average particle size of 100 .mu.m or less, a ratio (T/a) of the minimum outer size (T) and the maximum outer size (a) of the magnetic carrier being 0.02-0.5. Since the magnetic carrier has a large specific surface area, a toner can be sufficiently charged by the magnetic toner. Therefore, a high quality printed image free from defect such as fogging, spreadness, carrier adhesion, streak, etc. can be obtained even in continuous printing of a long period of time.
摘要翻译： 一种用于电子照相记录的显影剂的磁性载体，包括平均粒度为100μm以下的铁磁性颗粒，最小外径（T）和最大外径（A）的比（T / a） ）为0.02-0.5。 由于磁性载体具有大的比表面积，所以可通过磁性调色剂使调色剂充分充电。 因此，即使在长时间的连续打印中也可以获得没有诸如雾化，蔓延，载体附着，条纹等缺陷的高质量印刷图像。
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8.发明授权
公开(公告)号：US5866289A
公开(公告)日：1999-02-02
申请号：US892587
申请日：1997-07-14
申请人： Masumi Asanae , Masahisa Ochiai
发明人： Masumi Asanae , Masahisa Ochiai
CPC分类号： G03G15/09 , G03G9/0835 , G03G9/107
摘要： A developer for electrostatic development, which is a mechanical mixture of a magnetic toner containing a binder resin and a magnetic powder as the essential component and a magnetic carrier having a specific volume resistance of 10.sup.9 .OMEGA..cndot. cm or more. The properties of the magnetic toner and the magnetic carrier are correlated to each other so that an average particle size of the magnetic carrier is 0.5 to 6 times an average particle size of the magnetic toner, a magnetization of the magnetic carrier is 0.5 to 4 times a magnetization of the magnetic toner, and a triboelectric charge w of the magnetic carrier (Qc) and a triboelectric charge of the magnetic toner (Qt) satisfy an equation: .vertline.Qt-Qc.vertline.=5 to 50 .mu.C/g.
摘要翻译： 用于静电显影的显影剂，其是含有粘合剂树脂的磁性调色剂和作为必需成分的磁性粉末的机械混合物，以及体积电阻为109欧姆时的磁性载体。 厘米或以上。 磁性调色剂和磁性载体的性质彼此相关，使得磁性载体的平均粒径为磁性调色剂的平均粒径的0.5〜6倍，磁性载体的磁化强度为0.5〜4倍 磁性调色剂的磁化和磁性载体（Qc）的摩擦电荷w和磁性调色剂（Qt）的摩擦电荷满足以下等式：| Qt-Qc | = 5至50μC/ g。
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公开(公告)号：US5717983A
公开(公告)日：1998-02-10
申请号：US385418
申请日：1995-02-08
CPC分类号： G03G13/013 , G03G13/09 , G03G15/0921 , G03G9/083 , G03G9/107
摘要： In an image forming method for developing an electrostatic latent image on an image bearing member by using a two-component magnetic developer includes the steps of supporting and conveying a magnetic developer directly on the surface of a permanent magnet with a plurality of magnetic poles provided on the surface and performing both the removal of the residual toner remaining on the surface of the image-bearing member and the development of the electrostatic latent image while rubbing said surface with said magnetic brush. The magnetic carriers in the magnetic developer have average particle sizes of 5 to 20 .mu.m and opposite to toner in polarity of charge, the magnetization .sigma..sub.1000 in a magnetic field of 1000 Oe is 50 emu/g or less. Nonspherical magnetic toner or non-magnetic toner made by a polymerization process and magnetic carriers may be used.
摘要翻译： 在通过使用双组分磁性显影剂在图像承载部件上显影静电潜像的图像形成方法包括以下步骤：将磁性显影剂直接支撑在永久磁铁的表面上，其中多个磁极设置在 表面并且同时执行残留在图像承载部件的表面上的剩余调色剂的去除和静电潜像的显影，同时用所述磁刷摩擦所述表面。 磁性显影剂中的磁性载体具有5至20μm的平均粒度并且与电荷极性与调色剂相反，在1000Oe的磁场中的磁化σ1000为50emu / g或更小。 可以使用通过聚合方法制造的非磁性调色剂或非磁性调色剂和磁性载体。
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公开(公告)号：US5516613A
公开(公告)日：1996-05-14
申请号：US352721
申请日：1994-12-02
申请人： Masumi Asanae , Masahisa Ochiai , Tsutomu Saitoh
发明人： Masumi Asanae , Masahisa Ochiai , Tsutomu Saitoh
CPC分类号： G03G9/10 , G03G9/083 , G03G9/107 , G03G2215/0609
摘要： A binary developer is composed of a carrier and a magnetic toner. The carrier consists of nonspherically formed magnetic particles having an average diameter of 5 to 100 .mu.m, preferably 5 to 50 .mu.m. The magnetic toner is formed to have an average particle diameter of 10 .mu.m or less and a saturated magnetization .sigma..sub.s of 50 emu/g or less.
摘要翻译： 二元显影剂由载体和磁性调色剂组成。 载体由平均直径为5至100μm，优选5至50μm的非形式形成的磁性颗粒组成。 磁性调色剂的平均粒径为10μm以下，饱和磁化σs为50emu / g以下。
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