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公开(公告)号：US5682584A
公开(公告)日：1997-10-28
申请号：US505491
申请日：1995-07-21
CPC分类号： G03G15/0822
摘要： A developer transporting device for electrophotographic copiers has a pair of walls, a rotating shaft supported between the pair of walls, a first transporting member provided on the rotating shaft, a rotating cylindrical screw concentrically sheathing the rotating shaft and having a second transporting member provided on an exterior surface thereof and apertures provided at both ends thereof, an inflow pipe mounted on one wall of the pair of walls and extending into one end of the cylindrical screw and provided with a developer inflow opening facing an aperture of the cylindrical screw, and an outflow pipe mounted on the other wall of the pair of walls and extending into the other end of the cylindrical screw and provided with a developer outflow opening facing an aperture of the cylindrical screw. Developer outside the cylindrical screw is transported from the outflow pipe to the inflow pipe by the second transporting member and developer in the cylindrical screw is transported from the inflow pipe to the outflow pipe by the first transporting member. Developer is thus circulated inside and outside the cylindrical screw in a manner to ensure proper mixing thereof. The cylindrical screw preferably includes interior and exterior surfaces which have different coefficients of friction for more effective transport of the developer.
摘要翻译： 一种用于电子照相复印机的显影剂传送装置具有一对壁，一对支撑在一对壁之间的旋转轴，设置在旋转轴上的第一传送构件，同心地包围旋转轴的旋转圆柱形螺杆，并具有设置在其上的第二传送构件 其外表面和设置在其两端的孔，安装在一对壁的一个壁上并延伸到圆柱形螺杆的一端并设置有面向圆柱形螺杆的孔的显影剂流入开口的流入管， 流出管安装在一对壁的另一壁上并延伸到圆柱形螺杆的另一端并设置有面向圆柱形螺钉的孔的显影剂流出开口。 圆筒形螺杆外的显影剂通过第二传送构件从流出管输送到流入管，圆柱形螺杆中的显影剂通过第一传送构件从流入管传送到流出管。 因此，显影剂以圆柱形螺杆的内部和外部循环，以确保其适当的混合。 圆柱形螺杆优选地包括具有不同摩擦系数的内表面和外表面，用于更有效地运输显影剂。
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2.发明授权
公开(公告)号：US5311256A
公开(公告)日：1994-05-10
申请号：US708737
申请日：1991-05-31
CPC分类号： G03G15/0849 , G03G15/0848
摘要： An image forming apparatus having a toner density detecting sensor, a humidity sensor and a memory for storing past record of detected humidity. The toner density is compensated by referring to the detected toner density, currently detected humidity and past record of humidity to maintain image density stability.
摘要翻译： 具有调色剂浓度检测传感器，湿度传感器和用于存储检测到的湿度的过去记录的存储器的图像形成装置。 通过参考检测到的调色剂浓度，当前检测到的湿度和过去的湿度记录来补偿调色剂浓度，以保持图像浓度的稳定性。
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公开(公告)号：US5963766A
公开(公告)日：1999-10-05
申请号：US92876
申请日：1998-06-08
申请人： Yukihiko Okuno , Suguru Hamamichi , Shinichi Yoshimoto , Kentaro Katori , Mineyuki Sako , Yoshihiro Shojo
发明人： Yukihiko Okuno , Suguru Hamamichi , Shinichi Yoshimoto , Kentaro Katori , Mineyuki Sako , Yoshihiro Shojo
IPC分类号： G03G15/08
CPC分类号： G03G15/0822 , G03G2215/0822 , G03G2215/0841
摘要： A supply screw 10 and a collection screw 20 for a developing device equip with screw blades having different forms at particular sections so as to make conveying force of developer different depending on sections. Screw blades for big conveying force are attached within sections where developer distribution is dense while screw blades for small conveying force are attached within sections where developer distribution is sparse. In other words, conveying force is made to be greater at sparse-distribution section while smaller at dense-distribution section. Developer delivery is also promoted by providing different conveying force area within carry-up area where developer is carried up from a supply screw 10 to a collection screw 20 or vice versa. By making conveying force of each section different, developer is uniformly delivered to a developing roll 87 whether in width direction or in axial direction. Furthermore, developer circulation in a developing device becomes smooth.
摘要翻译： 用于显影装置的供应螺钉10和收集螺钉20装备在特定部分具有不同形式的螺旋叶片，以使显影剂的输送力根据部分不同。 用于大输送力的螺旋叶片安装在显影剂分布密集的部分内，而用于小传送力的螺旋叶片连接在显影剂分布稀疏的部分内。 换句话说，在稀疏分布部分处的输送力较大，而在致密分布部分则较小。 还可以通过在显影剂从供给螺钉10向收集螺钉20运送的携带区域内提供不同的输送力区域，反之亦然地促进显影剂输送。 通过使各部分的输送力不同，显影剂在宽度方向或轴向方向上均匀地传送到显影辊87。 此外，显影装置中的显影剂循环变得平滑。
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公开(公告)号：US5950056A
公开(公告)日：1999-09-07
申请号：US97811
申请日：1998-06-16
IPC分类号： G03G15/08
CPC分类号： G03G15/0822 , G03G2215/0822
摘要： A developing device capable of preventing a reduction of image quality due to disparities in image density or fogging and the like that result from an nonuniform toner concentration or static charge status due to inadequate mixing of a developer. The developing device is provided with a mixing screw for mixing a developer separately from a supply screw for supplying a developer to a developing roller and a collection screw for collecting a developer from the developing roller, the transport direction of the mixing screw being opposite to the transport direction of the supply screw and collection screw.
摘要翻译： 一种能够防止由于显影剂混合不充分而导致由调色剂浓度不均匀或静电充电状态引起的图像浓度或起雾等不均造成的图像质量降低的显影装置。 显影装置设置有用于将显影剂与用于将显影剂供应到显影辊的供应螺杆分开的显影剂混合器和用于从显影辊收集显影剂的收集螺杆，混合螺杆的输送方向与 供应螺丝和收集螺丝的运输方向。
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公开(公告)号：US06281961B1
公开(公告)日：2001-08-28
申请号：US09229681
申请日：1999-01-13
IPC分类号： G03B2732
CPC分类号： G03G15/0822 , G03B27/32 , G03G2215/0819
摘要： In a vertical type developing device in which plurality of screws are arranged up and down, developer transported by an upper developer transporting screw and developer transported by lower developer transporting screw are properly dispersed. Thereby, developer flows smoothly and further stirs and mixes. As means of it, the followings are included: (1) between the upper screw and the lower screw, properly adjusting developer transporting capabilities and dispersing pressures; (2) arrangement of dispersing members between the upper and lower developer transporting screws; (3) arrangement of openings at a partition wall; (4) arrangement of a developer reservoir portions to a developer accommodating unit; or the like.
摘要翻译： 在上下配置有多个螺钉的立式显影装置中，由上显影剂输送螺杆输送的显影剂和由下显影剂输送螺杆输送的显影剂适当地分散。 因此，显影剂流畅地进行搅拌并混合。 作为方法，包括：（1）上螺丝和下螺丝之间，适当调节显影剂传输能力和分散压力; （2）分散构件在上下显影剂输送螺钉之间的布置; （3）在分隔壁处设置开口; （4）将显影剂储存部分布置到显影剂容纳单元; 或类似物。
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公开(公告)号：US6122472A
公开(公告)日：2000-09-19
申请号：US172277
申请日：1998-10-14
IPC分类号： G03G15/08
CPC分类号： G03G15/0822 , G03G2215/0838
摘要： The present invention is to provide a developing apparatus having a supply screw and a recovery screw both of which are arranged vertically to circulate developer, wherein a component in a normal direction of pressure generated by the recovery screw is made larger than that of pressure generated by the supply screw. Thereby, lowering and raising of developer is suppressed and occurrence of fog on the image and the smoke of toner are prevented. Alternatively, a radial member and a centrifugal member are applied to the supply screw and the recovery screw, respectively. Thereby, developer is prevented from moving between screws in the midst of the transportation. Still alternatively, a preliminary stirring portion is provided on extension of a stirring screw at upperstream side. The preliminary stirring portion has a cylindrical body with inlets and outlets. Both inside and outside of the cylindrical body, screws are provided and inclines of screw blades are reversed to each other. Thereby, it enables the developing apparatus to transport the developer which is sufficiently stirred and charged to a development zone without being accompanied by a large-scaled apparatus.
摘要翻译： 本发明提供一种具有供给螺杆和回收螺杆的显影装置，它们都垂直设置以使显影剂循环，其中由回收螺杆产生的沿正常压力方向的分量大于由 供应螺丝。 由此，抑制了显影剂的降低和升高，并且防止了图像上的灰雾和调色剂的烟雾。 或者，将径向构件和离心构件分别施加到供给螺钉和回收螺钉。 因此，防止了在运输中间的螺丝之间移动显影剂。 或者，在上游侧的搅拌螺杆的延伸部设置预备搅拌部。 初步搅拌部分具有带入口和出口的圆柱体。 圆柱体的内部和外部均设有螺钉，并且螺旋叶片的倾斜彼此相反。 由此，能够使显影装置将充分搅拌和充电的显影剂输送到显影区而不伴随大型装置。
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7.发明授权Image forming apparatus controlled according to smallest non-zero toner density 失效图像形成装置根据最小的非零调色剂密度进行控制
公开(公告)号：US5274424A
公开(公告)日：1993-12-28
申请号：US991307
申请日：1992-12-16
IPC分类号： B41J2/52 , G03G15/00 , G03G15/01 , G03G15/04 , G03G15/043 , G03G15/36 , H04N1/40 , H04N1/407
CPC分类号： H04N1/4078 , G03G15/01 , H04N1/40025
摘要： In an image forming apparatus with use of electrophotographic process, a plurality of toner images are formed on a photoconductor by changing stepwise a predetermined operating parameter such as light intensity of laser beam or the grid potential of sensitizing charger, and the densities of the toner images are measured. Thus, the value of the operating parameter is determined which corresponds with the smallest non-zero toner density among the measured densities. When an image is formed on the photoconductor, for example the gamma table is corrected according to the determined minimum light intensity.
摘要翻译： 在使用电子照相方法的图像形成装置中，通过逐步改变诸如激光束的光强度或敏化充电器的栅极电位的预定操作参数以及调色剂图像的密度，在感光体上形成多个调色剂图像 被测量。 因此，确定与测量的密度中的最小非零调色剂密度相对应的操作参数的值。 当在感光体上形成图像时，例如根据所确定的最小光强度校正伽马表。
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公开(公告)号：US5325122A
公开(公告)日：1994-06-28
申请号：US14244
申请日：1993-02-05
CPC分类号： G03G15/5037 , G03G15/5041 , H04N1/4076 , G03G2215/00042
摘要： A digital half-tone image is reproduced by exposing a photoconductor by modulating the intensity of laser beam. In order to correct the effect of the size of laser beam on the gradation characteristic, the surface potential of the photoconductor is detected under various conditions. The sensitizing potential and the sensitivity of the photoconductor are corrected according to the measured values for stabilizing the gradation potential. Then, the beam size is corrected according to the surface potential or the amount of adhered toners detected under prescribed conditions, without detecting the beam size.
摘要翻译： 通过调制激光束的强度来曝光光电导体来再现数字半色调图像。 为了校正激光束的尺寸对灰度特性的影响，在各种条件下检测感光体的表面电位。 根据用于稳定灰度级的电位的测量值校正感光体的感光度和感光度。 然后，根据在规定条件下检测到的粘附的调色剂的表面电位或量，而不检测光束尺寸来校正光束尺寸。
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公开(公告)号：US5311215A
公开(公告)日：1994-05-10
申请号：US13437
申请日：1993-02-04
CPC分类号： H04N1/4076
摘要： In forming a digital image on the photoconductor wherein the intensity of the laser beam is modulated according to multi-level image data, a standard toner image is formed at an intermediate intensity at which the reproduced image density is not affected by the beam size, and the toner density is detected. On the other hand, the size of the beam for exposing the photoconductor is measured. Then, the gradation characteristic is controlled according to the toner density and the beam size. Thus, the effect of the beam size on the gradation characteristic is corrected.
摘要翻译： 在根据多级图像数据在激光束的强度进行调制的光电导体上形成数字图像时，以不影响光束大小的再现图像浓度的中间强度形成标准调色剂图像，并且 检测到调色剂浓度。 另一方面，测量用于曝光光电导体的光束的尺寸。 然后，根据调色剂浓度和光束尺寸来控制灰度特性。 因此，校正了束尺寸对灰度特性的影响。
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10.发明授权Image forming apparatus having correction means for modifying image density signals according to a gradation correction table 失效图像形成装置具有根据灰度校正表来修正图像浓度信号的校正装置
公开(公告)号：US5305057A
公开(公告)日：1994-04-19
申请号：US907671
申请日：1992-07-02
CPC分类号： G03G15/5037 , G03G15/5033 , H04N1/295 , H04N1/4076 , G03G2215/00042 , G03G2215/00084
摘要： In an electrophotographic image forming apparatus, a charger sensitizes the photoconductor at a desired initial potential and the photoconductor is exposed to form an electrostatic latent image, which is developed by a developer to form a toner image. A gradation correction table on the relation of the input image signal to the exposure amount is provided in a memory, and it is amended by adding a common amendment value to the image density signal in the gradation correction table. The common amendment value is determined according to the density of a standard toner image. If a plurality of gradation correction tables are stored in a memory, one of them is selected according to the output voltage of the charger or the bias potential of the developer. The selected gradation correction table is amended according to the surface potential of the photoconductor, the temperature of the photoconductor or the humidity of the photoconductor. Alternately, the detection value of the surface potential, the temperature or the humidity may be used to select the gradation correction table. The gradation table may be amended according to the state of the photoconductor. The amplification factor of the exposure amount for the photoconductor can be changed according to the state of the photoconductor, the temperature or the humidity of the photoconductor. The bias voltage of the developer or the output voltage of the charger may also be changed according to the state of the photoconductor.
摘要翻译： 在电子照相图像形成装置中，充电器使感光体以期望的初始电位感光，并且将感光体暴露以形成由显影剂显影以形成调色剂图像的静电潜像。 在存储器中提供关于输入图像信号与曝光量的关系的灰度校正表，并且通过在灰度校正表中对图像浓度信号添加公共修正值来进行修正。 常规修正值根据标准调色剂图像的浓度确定。 如果将多个灰度校正表存储在存储器中，则根据充电器的输出电压或显影剂的偏置电位选择其中之一。 所选择的灰度校正表根据感光体的表面电位，感光体的温度或感光体的湿度进行修正。 或者，可以使用表面电位，温度或湿度的检测值来选择灰度校正表。 可以根据感光体的状态修改灰度级。 可以根据光电导体的状态，光电导体的温度或湿度来改变感光体的曝光量的放大系数。 显影剂的偏置电压或充电器的输出电压也可以根据感光体的状态而改变。
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