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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：US06075964A
公开(公告)日：2000-06-13
申请号：US917557
申请日：1997-08-26
CPC分类号： G03G13/013 , G03G13/09 , G03G15/0921 , G03G9/083 , G03G9/107
摘要： An image forming method for developing an electrostatic latent image on a moving image-bearing member with a magnetic developer and for removing the residual toner after transfer of a developed toner image onto a transfer member is described. The method includes providing a rotatable, cylindrical permanent magnet having a plurality of magnetic poles on the surface for supporting and conveying the magnetic developer directly on the magnet surface; forming an electrostatic latent image into a toner image by attracting and conveying a magnetic developer including a nonspherical magnetic toner obtained by a polymerization or a nonspherical magnetic or non-magnetic toner obtained by a polymerization and magnetic carriers; and removing the residual toner remaining on the image-bearing member after transferring this toner image by a cleaning blade. The method also includes a surface magnetic flux density ranging from 50 to 1200 G, and a value of h, defined as .pi.D.multidot.Vp/(M.multidot.Vm), of 2 or less wherein Vp (mm/s) is the moving speed of the image-bearer, and D (mm), M, and Vm (mm/s) are the outer diameter, the number of magnetic poles, and the peripheral speed of the permanent magnet, respectively.
摘要翻译： 描述了一种使用磁性显影剂在运动图像承载部件上显影静电潜像并将显影的调色剂图像转印到转印部件上之后去除残留调色剂的图像形成方法。 该方法包括提供一种可旋转的圆柱形永磁体，其在表面上具有多个磁极，用于直接在磁体表面上支撑和传送磁性显影剂; 通过吸引和输送包含通过聚合获得的非球形磁性调色剂或通过聚合和磁性载体获得的非球形磁性或非磁性调色剂的磁性显影剂，将静电潜像形成调色剂图像; 并且通过清洁刮板转印该调色剂图像之后去除残留在图像承载部件上的残留调色剂。 该方法还包括范围为50至1200G的表面磁通密度和定义为pi DxVp /（MxVm）的h的值为2或更小，其中Vp（mm / s）是图像 - 承载体和D（mm），M和Vm（mm / s）分别是永磁体的外径，磁极数和圆周速度。
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公开(公告)号：US5926677A
公开(公告)日：1999-07-20
申请号：US917426
申请日：1997-08-26
CPC分类号： G03G13/013 , G03G13/09 , G03G15/0921 , G03G9/083 , G03G9/107
摘要： An image forming method for developing an electrostatic latent image on an image-bearing member that moves bearing electrostatic latent images formed of a two-component magnetic developer is described. The method includes the steps of providing a rotatable cylinder for supporting and conveying said magnetic developer, the cylinder including a permanent magnet with a plurality of magnetic poles provided on the surface. Magnetic carriers in the magnetic developer are attracted and conveyed on the surface of the permanent magnet, the magnetic carriers having an average particle size of 5 to 20 .mu.m and opposite to toner in polarity of charge. A carrier particle magnetization .sigma..sub.1000 in a magnetic field of 1000 Oe so as to amount to 50 emu/g or less is also used. The method also includes a surface magnetic flux density ranging from 50 to 1200 G, and a value of h, defined as .pi.D.multidot.Vp/(M.multidot.Vm), of 2 or less wherein Vp (mm/s) is the moving speed of the image-bearer, and D (mm), M, and Vm (mm/s) are the outer diameter, the number of magnetic poles, and peripheral speed of the permanent magnet, respectively.
摘要翻译： 描述了一种图像形成方法，用于在承载由双组分磁性显影剂形成的静电潜像的运动的图像承载部件上显影静电潜像。 该方法包括以下步骤：提供用于支撑和输送所述磁性显影剂的可旋转气缸，所述气缸包括具有设置在所述表面上的多个磁极的永磁体。 磁性显影剂中的磁性载体在永磁体的表面上被吸引并输送，磁性载体的平均粒度为5〜20μm，与电荷极性与调色剂相反。 还使用在1000Oe的磁场中的载流子粒子磁化σ1000，以达到50emu / g以下。 该方法还包括范围为50至1200G的表面磁通密度和定义为pi DxVp /（MxVm）的h的值为2或更小，其中Vp（mm / s）是图像 - 承载体和D（mm），M和Vm（mm / s）分别是永磁体的外径，磁极数和圆周速度。
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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：US6072974A
公开(公告)日：2000-06-06
申请号：US917686
申请日：1997-08-26
CPC分类号： G03G13/013 , G03G13/09 , G03G15/0921 , G03G9/083 , G03G9/107
摘要： An image forming method for operating a moving image-bearing member bearing an electrostatic latent image and a plurality of developing units disposed near the image-bearing member and being selectively operable is described. The color image forming method develops the electrostatic latent image by using a magnetic developer brush formed on the surface of a developer support and conveyance means, and includes the steps of: providing a rotating cylinder for supporting and conveying the magnetic developer, the cylinder including a permanent magnet with a plurality of magnetic poles on the cylinder surface; supplying a magnetic developer containing non-magnetic color toner for color image formation; attracting and conveying a layer of magnetic developer having a smaller thickness than the gap between the image-bearing member and the developer support and conveyance cylinder on the cylinder surface; and applying in the developing region an alternate electric field with an AC bias superimposed on a DC bias between the image-bearing member and the magnetic developer for the developing of an electrostatic latent image on the image-bearing member. The method also includes a surface magnetic flux density ranging from 50 to 1200 G, and a value of h, defined as .pi.D.multidot.V.sub.p /(M.multidot.V.sub.m), of 2 or less wherein V.sub.p (mm/s) is the moving speed of the image-bearer, and D (mm), M, and V.sub.m (mm/s) are the outer diameter, the number of magnetic poles, and the peripheral speed of the permanent magnet, respectively.
摘要翻译： 描述了用于操作承载静电潜像的运动图像承载部件和设置在图像承载部件附近并且可选择性地操作的多个显影单元的图像形成方法。 彩色图像形成方法通过使用形成在显影剂载体和输送装置的表面上的磁性显影刷来显影静电潜像，并且包括以下步骤：提供用于支撑和输送磁性显影剂的旋转圆筒，所述气缸包括 在圆筒表面上具有多个磁极的永磁体; 提供含有用于彩色图像形成的非磁性彩色调色剂的磁性显影剂; 吸引并传送具有比图像承载部件和显影剂载体和传送滚筒之间的间隙小的磁性显影剂层; 并且在显影区域中施加交替偏压叠加在图像承载部件和磁性显影剂之间的DC偏压上的交替电场，用于在图像承载部件上显影静电潜像。 该方法还包括范围为50至1200G的表面磁通密度和定义为pi DxVp /（MxVm）的h的值为2或更小，其中Vp（mm / s）是图像 - 承载体和D（mm），M和Vm（mm / s）分别是永磁体的外径，磁极数和圆周速度。
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公开(公告)号：US5565966A
公开(公告)日：1996-10-15
申请号：US443403
申请日：1995-05-17
CPC分类号： G03G13/09 , G03G15/0921 , G03G9/0823 , G03G9/083
摘要： A sleeveless magnet roller is formed of at least magnetic powder and resin. It is so arranged that, letting a developing gap Ds be the gap between an image-bearing member for holding an electrostatic latent image and a developer conveying member and a doctor gap Dg be the gap between the developer conveying member and a developer's thickness regulating member, one obtains Ds-Dg=0.1 to 0.3 (mm) and Dg=0 to 0.4 (mm). For image formation, one- or two-component magnetic developer is used and a bias voltage, formed by superimposing AC bias voltage to DC bias voltage, is applied to the developing region.
摘要翻译： 无袖磁辊至少由磁粉和树脂形成。 这样布置使得显影间隙Ds是用于保持静电潜像的图像承载部件和显影剂传送部件之间的间隙和刮刀间隙Dg是显影剂传送部件和显影剂厚度调节部件之间的间隙 ，得到Ds-Dg = 0.1〜0.3（mm），Dg = 0〜0.4（mm）。 对于图像形成，使用单组分或双组分磁性显影剂，并且通过将AC偏置电压叠加到DC偏置电压形成的偏置电压施加到显影区域。
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