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1. 发明授权

US5305057A Image forming apparatus having correction means for modifying image density signals according to a gradation correction table 失效
标题翻译：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
申请人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama , Yoshikazu Naito , Takeru Kinoshita
发明人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama , Yoshikazu Naito , Takeru Kinoshita
IPC分类号： G03G15/00 , H04N1/29 , H04N1/407 , G03G21/00
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。

2. 发明授权

US5274424A Image forming apparatus controlled according to smallest non-zero toner density 失效
标题翻译：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
申请人： Yoshihiro Hattori , Hideaki Kodama , Suguru Hamamichi , Takeru Kinoshita
发明人： Yoshihiro Hattori , Hideaki Kodama , Suguru Hamamichi , Takeru Kinoshita
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。

3. 发明授权

US5325122A Apparatus for forming digital images 失效
标题翻译：用于形成数字图像的装置
公开(公告)号：US5325122A
公开(公告)日：1994-06-28
申请号：US14244
申请日：1993-02-05
申请人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama
发明人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama
IPC分类号： B41J2/44 , G03G15/00 , G03G15/04 , H04N1/23 , H04N1/407 , G01D15/14
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。

4. 发明授权

US5311215A Apparatus and method for forming digital image 失效
标题翻译：用于形成数字图像的装置和方法
公开(公告)号：US5311215A
公开(公告)日：1994-05-10
申请号：US13437
申请日：1993-02-04
申请人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama
发明人： Yoshihiro Hattori , Suguru Hamamichi , Hideaki Kodama
IPC分类号： B41J2/52 , B41J2/44 , G03G15/00 , G03G15/04 , H04N1/23 , H04N1/29 , H04N1/407 , G01D15/00
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。

5. 发明授权

US5619308A Electrophotographic image forming apparatus adjusting image forming means based on surface voltage of photoconductor 失效
标题翻译：基于光电导体的表面电压调节图像形成装置的电子照相图像形成装置
公开(公告)号：US5619308A
公开(公告)日：1997-04-08
申请号：US63082
申请日：1993-05-18
申请人： Naoyoshi Kinoshita , Takeru Kinoshita , Hideaki Kodama
发明人： Naoyoshi Kinoshita , Takeru Kinoshita , Hideaki Kodama
IPC分类号： G03G15/00 , G03G21/00
CPC分类号： G03G15/5037 , G03G15/50 , G03G2215/00042 , G03G2215/00054 , G03G2215/00063 , G03G2215/00084
摘要： In an electrophotographic image forming apparatus including a photoconductive drum, the photoconductive drum is electrically charged by a corona charger, and light corresponding to an image is projected onto the photoconductive drum by an exposure optical system, thereby forming an electrostatic latent image thereon. Thereafter, the formed electrostatic latent image is developed with toner by a developing unit to form a toner image thereon, and then the toner image is transferred onto a sheet of paper. There is further provided a voltage sensor for detecting a surface voltage at at least one position of the photoconductive drum. An operation value of at least one of the corona charger, the exposure optical system and the developing unit is adjusted by an adjustment controller based on the surface voltage detected by the voltage sensor at a timing between respective image forming processes when an image forming process is continuously repeated a plurality of times. Further, the operation value of at least one of the corona charger, the exposure optical system and the developing unit is further adjusted with a preciseness higher than that of the adjusting controller, based on the surface voltage detected by the voltage sensor, prior to a process of continuously repeating an image forming process a plurality of times.
摘要翻译：在包括感光鼓的电子照相图像形成装置中，感光鼓由电晕充电器充电，并且对应于图像的光通过曝光光学系统投射到感光鼓上，从而在其上形成静电潜像。此后，通过显影单元将所形成的静电潜像用调色剂显影以在其上形成调色剂图像，然后将调色剂图像转印到一张纸上。还提供了用于检测感光鼓的至少一个位置处的表面电压的电压传感器。电晕充电器，曝光光学系统和显影单元中的至少一个的操作值在图像形成处理为图像形成处理之前的各图像形成处理之间的定时基于由电压传感器检测到的表面电压由调整控制器进行调整不断重复多次。此外，电晕充电器，曝光光学系统和显影单元中的至少一个的操作值进一步基于在电压传感器检测到的表面电压之前，以比调节控制器的精度更高的精度进行调整多次连续重复图像形成处理的处理。

6. 外观设计

USD294023S Combined telephone stand and handset 失效
公开(公告)号：USD294023S
公开(公告)日：1988-02-02
申请号：US905322
申请日：1986-09-09
申请人： Akira Sekiguchi , Hideaki Kodama
设计人： Akira Sekiguchi , Hideaki Kodama

7. 发明授权

US5805957A Image forming apparatus 失效
标题翻译：图像形成装置
公开(公告)号：US5805957A
公开(公告)日：1998-09-08
申请号：US780267
申请日：1997-01-08
申请人： Hideaki Kodama , Eiji Nakane
发明人： Hideaki Kodama , Eiji Nakane
IPC分类号： G03G15/00 , G03G15/16
CPC分类号： G03G15/165 , G03G2215/00721 , G03G2215/00738
摘要： A pressing force adjusting mechanism decreases a pressing force of a pressing member 16 when a leading edge or a rear edge of a transfer material P passes through a transfer point P1 based on the detection signals from a transfer material position sensor 57 and/or a transfer material type sensor 58.
摘要翻译：基于来自转印材料位置传感器57的检测信号和/或转印材料，当转印材料P的前边缘或后边缘通过转印点P1时，按压力调节机构降低按压部件16的按压力材料型传感器58。

8. 外观设计

USD287361S Handset and stand telephone unit 失效
公开(公告)号：USD287361S
公开(公告)日：1986-12-23
申请号：US627834
申请日：1984-07-05
申请人： Akira Sekiguchi , Hideaki Kodama
设计人： Akira Sekiguchi , Hideaki Kodama

9. 发明授权

US5966560A Image forming apparatus with enhanced pretransfer erasing 失效
标题翻译：具有增强的预转印擦除的图像形成装置
公开(公告)号：US5966560A
公开(公告)日：1999-10-12
申请号：US704210
申请日：1996-08-29
申请人： Hideaki Kodama , Yasuhiro Ohno , Kazuomi Sakatani , Makoto Takase
发明人： Hideaki Kodama , Yasuhiro Ohno , Kazuomi Sakatani , Makoto Takase
IPC分类号： G03G15/16 , G03G15/14
CPC分类号： G03G15/169 , G03G15/167
摘要： In an electrophotographic copying machine, image quality is improved by suppressing phenomena such as narrowing and thickening of a linear image or discharge noises in a photograph image due to anomalies on transfer of a toner image. For example, a document type is discriminated and when a transfer brush is used for transfer, transfer current and pretransfer erasing are controlled according to the type of document image. The pretransfer erasing is controlled in various following situations: Bi-level exposure method or multi-level exposure method, edge emphasis, photoelectric efficiency, the surface potential of the photoconductor, and position of a developing device.
摘要翻译：在电子照相复印机中，通过抑制由于调色剂图像的转印异常引起的线形图像的变窄和增厚或照片图像中的放电噪声等现象而提高了图像质量。例如，识别文档类型，并且当使用传送刷子进行传送时，根据文档图像的类型来控制传送电流和预传送擦除。在以下各种情况下控制预转印擦除：双层曝光方法或多层曝光方法，边缘强调，光电效率，感光体的表面电位和显影装置的位置。

10. 发明授权

US5943526A Image forming apparatus with an impedance varying device and method of using same 失效
标题翻译：具有阻抗变化装置的图像形成装置及其使用方法
公开(公告)号：US5943526A
公开(公告)日：1999-08-24
申请号：US69139
申请日：1998-04-29
申请人： Hideaki Kodama
发明人： Hideaki Kodama
IPC分类号： G03G15/16 , G03G15/00
CPC分类号： G03G15/167 , G03G2215/0119 , G03G2215/1619 , G03G2215/1623
摘要： An image forming apparatus gets information on the thickness of the photosensitive layer by using the image transfer power source and transfer brush, and controls the contact position of the transfer brush on the paper carrying belt based on the thickness information, so that in case the photosensitive layer wears thin partially due to the long-term use, the apparatus increases in compensation the impedance of the carrying belt in its section from the image transfer zone to the contact position of the transfer brush. The apparatus may be designed to use selectively multiple transfer brushes having different impedances, instead of the position control of one transfer brush. Consequently, the apparatus can retain the difference of impedance between the toner image portion and non-toner image portion in the transfer zone of the photosensitive layer and thus can retain the unevenness of transfer electric field distribution across the transfer zone in the same degree as with a new photosensitive layer, whereby it performs high-quality image formation without the occurrence of dropout throughout the long-term use. For a multi-color image forming apparatus, the image forming unit for black color that is most sensitive to the print quality implements the impedance control.
摘要翻译：图像形成装置通过使用图像转印电源和转印刷获得关于感光层厚度的信息，并且基于厚度信息来控制转印刷在承载带上的接触位置，使得在感光由于长期使用，薄层部分地磨损较薄，因此该装置将其部分中的传送带的阻抗从图像转印区域增加到传送刷的接触位置。该设备可以被设计成选择性地使用具有不同阻抗的多个传送刷，而不是一个传送刷的位置控制。因此，该装置可以保持感光层的转印区域中的调色剂图像部分和非调色剂图像部分之间的阻抗差，因此可以以与转印区域相同的程度保持转印区域的转印电场分布的不均匀度一种新的感光层，从而在整个长期使用中不会发生脱落，从而进行高质量的图像形成。对于多色图像形成装置，对打印质量最敏感的黑色图像形成单元实现阻抗控制。

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