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1. 发明授权

US06215968B1 Image forming apparatus with half-tone density control 有权
标题翻译：具有半色调密度控制的图像形成装置
公开(公告)号：US06215968B1
公开(公告)日：2001-04-10
申请号：US09545721
申请日：2000-04-07
申请人： Makoto Uehara , Toshihiro Ohta , Yasutaka Maeda , Takashi Kitagawa , Katsuhiro Nagayama , Shouji Tomita , Kaori Dakeshita , Daisaku Imaizumi
发明人： Makoto Uehara , Toshihiro Ohta , Yasutaka Maeda , Takashi Kitagawa , Katsuhiro Nagayama , Shouji Tomita , Kaori Dakeshita , Daisaku Imaizumi
IPC分类号： G03G1500
CPC分类号： H04N1/4078
摘要： A high density detecting toner pattern is formed on a photosensitive body and a high density correction is effected by comparing a value detected by a reflection sensor with a high density reference value so as to maintain an image density at a specific level. An image density correcting section adopts a result of the preceding high density correction as the high density reference value, and compares the same with a result of a current high density correction. The image density correcting section effects the half-tone density correction only when a difference reaches or exceeds a preset difference reference value by forming a half-tone density detecting toner pattern on the photosensitive body and comparing a value detected by the reflection sensor with a half-tone reference value. Consequently, it has become possible to provide an image forming apparatus which can maintain a density output of an entire image at a specific level for any kind of images including solid, line, and half-tone, etc. while shortening a time required for the density correction and reducing a quantity of toner consumed for the density correction.
摘要翻译：在感光体上形成高密度检测调色剂图案，并且通过将由反射传感器检测的值与高密度参考值进行比较来实现高密度校正，以将图像浓度保持在特定水平。图像浓度校正部分采用先前的高浓度校正的结果作为高密度参考值，并将其与当前高密度校正的结果进行比较。图像浓度校正部仅通过在感光体上形成半色调浓度检测调色剂图案而将差分达到或超过预设差值基准值来实现半色调浓度校正，并将反射传感器检测到的值与半参考值。因此，可以提供一种图像形成装置，其可以将包括实线，线条和半色调等的任何种类的图像的整个图像的浓度输出保持在特定的水平，同时缩短所需的时间密度校正和减少密度校正所消耗的调色剂量。

2. 发明授权

US06223007B1 Image forming apparatus 有权
标题翻译：图像形成装置
公开(公告)号：US06223007B1
公开(公告)日：2001-04-24
申请号：US09560679
申请日：2000-04-27
申请人： Takashi Kitagawa , Toshihiro Ohta , Yasutaka Maeda , Makoto Uehara , Katsuhiro Nagayama
发明人： Takashi Kitagawa , Toshihiro Ohta , Yasutaka Maeda , Makoto Uehara , Katsuhiro Nagayama
IPC分类号： G03G1500
CPC分类号： H04N1/4078
摘要： An object of the present invention is to obtain, in an accurate and stable manner, an image density at a tone rise point in a low-density region in order to form a stable image. At the time of execution of an image density correction in an image forming apparatus which employs an electrophotographic process, a toner pattern of a plurality of toner patches is formed on the basis of a reference density correction table which specifies an image density output value used for correction of an image density input value, the density of the toner patches is detected by a density detecting sensor, points corresponding to a plurality of image densities in a low-density region, detected above a predetermined level of sensitivity of the sensor, are plotted thereby to find a linear interpolation formula, an image density in the low-density region below the predetermined level of sensitivity of the density detecting sensor is interpolated with the linear interpolation formula, a comparison between the reference density correction table and a result of the interpolation is made so as to correct the image density output value, and a correction table as a post-modification correction table is prepared. An actual image is prepared using the correction table.
摘要翻译：本发明的目的是为了形成稳定的图像，以准确和稳定的方式获得低密度区域中的色调上升点处的图像浓度。在使用电子照相处理的图像形成装置中执行图像浓度校正时，基于参考密度校正表形成多个调色剂片的调色剂图案，该参考浓度校正表指定用于通过密度检测传感器检测图像浓度输入值的校正，调色剂片的密度被检测到，与在传感器的预定灵敏度水平以上检测到的低密度区域中的多个图像浓度相对应的点被绘制从而找到线性内插公式，利用线性内插公式内插低于密度检测传感器的预定灵敏度水平的低密度区域中的图像浓度，参考密度校正表与插值结果之间的比较进行图像浓度输出值的校正，以及修正后的校正表准备表。使用校正表准备实际图像。

3. 发明授权

US5987272A Image forming apparatus including image quality compensation means 失效
标题翻译：包括图像质量补偿装置的图像形成装置
公开(公告)号：US5987272A
公开(公告)日：1999-11-16
申请号：US10293
申请日：1998-01-21
申请人： Yasutaka Maeda , Toshihiro Ohta , Katsuhiro Nagayama
发明人： Yasutaka Maeda , Toshihiro Ohta , Katsuhiro Nagayama
IPC分类号： G03G21/00 , G03G15/00 , G03G15/08
CPC分类号： G03G15/5041 , G03G15/0173 , G03G15/0849 , G03G15/0853 , G03G15/5058 , G03G2215/00059
摘要： A test patch image is formed and the density thereof is detected to maintain the image quality at a constant level. One of the image forming conditions, for example, the developing bias voltage of the developing unit inside the image forming apparatus that serves as a density controller, and is controlled in accordance with the detection result. Here, a humidity sensor for detecting the environmental change, that is, the humidity, is provided inside the apparatus, and the reference value of the toner mixing ratio is changed and corrected while the developing unit is operating when the humidity sensor detects a change in humidity. However, the toner mixing ratio is maintained and neither changed nor corrected when the density of the test patch image remains at the same level, so that the developing bias voltage is not corrected. Consequently, the correction of the toner mixing ratio is neither changed nor corrected in response to the change in humidity alone, thereby making it possible to maintain a stable image quality state.
摘要翻译：形成测试贴片图像，并检测其密度以将图像质量保持在恒定水平。图像形成条件之一，例如，用作密度控制器的图像形成装置内的显影单元的显影偏压，并根据检测结果进行控制。这里，在设备内部设置用于检测环境变化的湿度传感器，即湿度，并且当湿度传感器检测到变化时，显影单元正在操作时，改变和校正调色剂混合比的参考值湿度。然而，当调色剂图像的浓度保持在相同水平时，保持调色剂混合比并且既不改变也不修正，从而不校正显影偏压。因此，根据单独的湿度变化，调色剂混合比的校正既不改变也不修正，从而可以保持稳定的图像质量状态。

4. 发明授权

US5204729A Full color copying machine 失效
标题翻译：全彩色复印机
公开(公告)号：US5204729A
公开(公告)日：1993-04-20
申请号：US638296
申请日：1991-01-07
申请人： Yasutaka Maeda , Taisuke Kamimura , Hideyuki Nishimura , Tsuyoshi Miyamoto , Katsuhiro Nagayama , Natsuko Tanaka , Yuichi Kazaki
发明人： Yasutaka Maeda , Taisuke Kamimura , Hideyuki Nishimura , Tsuyoshi Miyamoto , Katsuhiro Nagayama , Natsuko Tanaka , Yuichi Kazaki
IPC分类号： G03G15/01 , G03G15/04
CPC分类号： G03G15/04027 , G03G15/0115
摘要： A full color copying machine which includes intermediate transfer medium whereon toner images having respective color components, formed on a photoreceptor are transferred to form one color toner image, and a screen filter disposed so as to be freely inserted or removed in or from a path of exposure light, which filters the exposure light for exposing the photoreceptor into a pattern of lines. A plurality of color toner images obtained by executing a plurality of copying processes based on a plurality of exposures applied to an original document are superposed on the intermediate transfer medium to form a color toner image. The copying machine further includes a screen mode for inserting a screen filter into a path of exposure light and a normal mode for removing the screen filter from the path of exposure light. Thus, exposures intended for low density components and high density components in an original document image are respectively performed by the use of the different modes, or they are respectively performed by changing setting conditions of the screen filter in the screen mode. With these arrangements, efficient application of the exposure device and high quality of the copied images can be achieved.
摘要翻译：一种全彩色复印机，其包括中间转印介质，其中形成在感光体上的具有各自颜色成分的调色剂图像被转印以形成单色调色剂图像;以及筛网过滤器，其被设置为在曝光光，其过滤曝光光以将感光体曝光成线条图案。通过基于施加到原始文档的多次曝光执行多个复印处理而获得的多个彩色调色剂图像叠加在中间转印介质上以形成彩色调色剂图像。复印机还包括用于将屏幕过滤器插入曝光光路径的屏幕模式和用于从曝光光线路径移除屏幕过滤器的正常模式。因此，分别通过使用不同的模式来分别执行原始文档图像中用于低密度分量和高密度分量的曝光，或者它们分别通过在屏幕模式中改变屏幕滤镜的设置条件来执行。通过这些布置，可以实现曝光装置的有效应用和复印图像的高质量。

5. 发明授权

US5200783A Black image density correcting device 失效
标题翻译：黑色图像浓度校正装置
公开(公告)号：US5200783A
公开(公告)日：1993-04-06
申请号：US750575
申请日：1991-08-28
申请人： Yasutaka Maeda , Katsuhiro Nagayama
发明人： Yasutaka Maeda , Katsuhiro Nagayama
IPC分类号： G03G15/00 , G03G15/01 , G03G15/08
CPC分类号： G03G15/01
摘要： An image density correcting device for a color copying machine capable of producing monochrome copies and full color copies, the device including a toner density detecting means for detecting the toner density of a toner image transferred on a transfer medium; a toner density storing means for storing a predetermined reference value for the toner density; a toner density comparing/judging means for judging the toner density of the image by comparing the toner density detected by the toner density detecting means with the toner density reference value stored in the toner density storing means; and a toner density correcting means for correcting the toner density of the image based on the result of the comparison and judgment by the comparing/judging means, wherein the toner density is corrected after a black toner layer is formed in any non-black color detectable by the toner density detecting means, of areas where black toner layers are formed for monochrome copying with black toner.
摘要翻译：一种能够产生单色复印和全色复印的彩色复印机的图像浓度校正装置，该装置包括用于检测在转印介质上转印的调色剂图像的调色剂浓度的调色剂浓度检测装置; 调色剂浓度存储装置，用于存储调色剂浓度的预定参考值; 调色剂浓度比较/判定装置，用于通过将由调色剂浓度检测装置检测的调色剂浓度与存储在调色剂浓度存储装置中的调色剂浓度参考值进行比较来判断图像的调色剂浓度; 以及调色剂浓度校正装置，用于基于比较/判断装置的比较和判断结果校正图像的调色剂浓度，其中调色剂浓度在黑色调色剂层以任何非黑色可检测的形式形成之后被校正通过调色剂浓度检测装置，在黑色调色剂的单色复印中形成黑色调色剂层的区域。

6. 发明授权

US5343282A Color balance adjusting apparatus for full-color copier 失效
标题翻译：全彩复印机色平衡调节装置
公开(公告)号：US5343282A
公开(公告)日：1994-08-30
申请号：US99739
申请日：1993-07-30
申请人： Yuichi Kazaki , Yasutaka Maeda , Hiroshi Kawamoto , Hideyuki Nishimura , Katsuhiro Nagayama
发明人： Yuichi Kazaki , Yasutaka Maeda , Hiroshi Kawamoto , Hideyuki Nishimura , Katsuhiro Nagayama
IPC分类号： G03G15/00 , G03G15/01 , G03G15/04 , G03G15/043 , G03G15/08 , G03G21/00
CPC分类号： G03G15/011 , G03G15/01
摘要： A color balance adjusting apparatus is used for a full color copier in which an original image is illuminated by a light source; the illuminated image is exposed onto a photoreceptor to form electrostatic latent images corresponding to first, second and third colors for creating a color image; and each of the formed electrostatic latent images is developed into a visualized toner image. The color balance adjusting apparatus includes an infrared sensor for detecting toner density of the toner image formed with a toner having any one color of the first, second and third colors. The apparatus further includes automatic adjustment means which determines a relation of light intensity to toner density detected for one color by varying light intensity of said light source, and which determines optimal light intensity for the other two colors as predetermined functions of obtained optimal light intensity. Using this apparatus, automatic adjustment of the color balance for each copy mode can be effected in a short time with lesser consumption of electricity and supplies.
摘要翻译：色彩平衡调节装置用于其中原始图像被光源照射的全色复印机; 将照明图像曝光到感光体上以形成对应于第一，第二和第三颜色的静电潜像，以产生彩色图像; 并且每个形成的静电潜像被显影成可视化的调色剂图像。色平衡调节装置包括红外传感器，用于检测由具有第一，第二和第三颜色的任何一种颜色的调色剂形成的调色剂图像的调色剂浓度。该装置还包括自动调节装置，其通过改变所述光源的光强度来确定针对一种颜色检测的光强度与调色剂浓度的关系，并且确定其它两种颜色的最佳光强度作为获得的最佳光强度的预定函数。使用该装置，可以在较短的时间内对每种复印模式的颜色平衡进行自动调整，同时电力和耗材的消耗较少。

7. 发明授权

US5103266A Electrophotographic apparatus and method of cleaning the same 失效
标题翻译：电子照相设备及其清洗方法
公开(公告)号：US5103266A
公开(公告)日：1992-04-07
申请号：US667839
申请日：1991-03-12
申请人： Tsuyoshi Miyamoto , Yasutaka Maeda , Taisuke Kamimura , Katsuhiro Nagayama , Hideyuki Nishimura , Natsuko Tanaka
发明人： Tsuyoshi Miyamoto , Yasutaka Maeda , Taisuke Kamimura , Katsuhiro Nagayama , Hideyuki Nishimura , Natsuko Tanaka
IPC分类号： G03G21/10 , G03G15/01 , G03G15/08 , G03G21/00
CPC分类号： G03G21/0005 , G03G15/0105 , G03G2215/1661
摘要： A method of cleaning a photosensitive member in an electrophotographic apparatus in which an electrophotographic operation is performed by charging the photosensitive member with a predetermined voltage, exposing the charged photosensitive member so as to form a latent image thereon and developing the latent image by use of toner, includes the steps of charging the photosensitive member with a half tone level voltage which is smaller than the predetermined voltage, and developing the charged photosensitive member by use of toner without exposing the charged photosensitive member, so as to form a uniform half tone toner image thereon. The cleaning method also includes the step of scraping off the toner of the uniform half tone toner image from the photosensitive member by a blade abutting thereto.
摘要翻译：一种在电子照相设备中清洁感光构件的方法，其中通过以预定电压对感光构件充电来进行电子照相操作，使带电的感光构件曝光以在其上形成潜像并使用调色剂显影潜像包括以下步骤：以小于预定电压的半色调电平对感光构件充电，并且通过使用调色剂对带电感光构件进行显影而不使曝光带电的感光构件，从而形成均匀的半色调调色剂图像上。清洁方法还包括通过与其抵接的叶片从感光构件刮除均匀半色调调色剂图像的调色剂的步骤。

8. 发明授权

US5055877A Copying apparatus with moveable screen and method 失效
标题翻译：复制装置与移动屏幕和方法
公开(公告)号：US5055877A
公开(公告)日：1991-10-08
申请号：US460586
申请日：1990-01-03
申请人： Yasutaka Maeda , Natsuko Tanaka , Katsuhiro Nagayama , Hideyuki Nishimura
发明人： Yasutaka Maeda , Natsuko Tanaka , Katsuhiro Nagayama , Hideyuki Nishimura
IPC分类号： G03G15/01 , G03G15/04 , G03G15/06
CPC分类号： G03G15/0115 , G03G15/04027 , G03G15/065 , G03G2215/0174
摘要： A copying apparatus in which a screen for improving gradation characteristics of a copied image can be retractably projected into an optical path, including a device for setting, when the screen is placed in the optical path and retracted from the optical path, a developing voltage to a first value and a second value, respectively such that the first value is lower than the second value.

9. 发明授权

US5164782A Electrophotographic copying apparatus 失效
标题翻译：电子照相复印设备
公开(公告)号：US5164782A
公开(公告)日：1992-11-17
申请号：US774197
申请日：1991-10-10
申请人： Katsuhiro Nagayama , Yasutaka Maeda , Hideyuki Nishimura , Yoichi Shimazawa , Koichi Moriyama , Hideo Matsuda
发明人： Katsuhiro Nagayama , Yasutaka Maeda , Hideyuki Nishimura , Yoichi Shimazawa , Koichi Moriyama , Hideo Matsuda
IPC分类号： G03G15/20
CPC分类号： G03G15/20 , G03G15/2021 , G03G15/2064 , G03G15/6585 , G03G2215/2016 , G03G2215/2074 , G03G2215/208 , G03G2215/209
摘要： An electrophotographic copying apparatus comprises a photosensitive member (4) exposed by light reflected from an original to form an image of the original thereon, mechanism (13) for developing the image on the photosensitive member with toner (9, 10, 11, 12) to produce a toner image corresponding the image mechanism (24) for transferring the toner image onto a transfer material, mechanism (26) for fixing the toner image transferred on the transfer material, mechanism (27) for producing a signal which represents that high surface glossiness of the image copy is required, and mechanism (31, 32) for feeding the transfer material in a first path when the signal is produced, the transfer material being fixed fully, and for feeding the transfer material in a second path shorter than the first path when the signal is not produced.
摘要翻译：电子照相复印装置包括由原稿反射的光曝光的感光构件（4），用于在其上形成原稿的图像，用于利用调色剂（9,10,11,12）在感光构件上显影图像的机构（13）以产生对应于用于将调色剂图像转印到转印材料上的图像机构（24）的调色剂图像，用于固定转印在转印材料上的调色剂图像的机构（26），用于产生表示高表面的信号的机构（27）需要图像复制的光泽度，以及用于在产生信号时将转印材料馈送在第一路径中的机构（31,32），转印材料被完全固定，并且用于以比第二路径短当信号不产生时的第一条路径。

10. 发明授权

US5075731A Transfer roller device 失效
标题翻译：转印辊装置
公开(公告)号：US5075731A
公开(公告)日：1991-12-24
申请号：US668293
申请日：1991-03-12
申请人： Taisuke Kamimura , Yasutaka Maeda , Tuyoshi Miyamoto , Katsuhiro Nagayama , Hideyuki Nishimura , Natsuko Tanaka
发明人： Taisuke Kamimura , Yasutaka Maeda , Tuyoshi Miyamoto , Katsuhiro Nagayama , Hideyuki Nishimura , Natsuko Tanaka
IPC分类号： G03G15/16
CPC分类号： G03G15/1605
摘要： A transfer roller device for transferring onto a copy paper sheet a full color toner image formed on an intermediate transfer belt. A rear-surface electrode roller disposed at the opposite side to a transfer roller with the intermediate transfer belt positioned in between, is divided into a plurality of cylinder members, and at least one of the cylinder members corresponding to the size of a copy paper sheet is separately connected to ground. With the arrangement, occurrence of an excess current through a portion of the intermediate transfer belt carrying no copy paper sheet thereon is eliminated, thereby preventing a filming phenomenon. In another arrangement, a plurality of rear-surface electrode rollers are disposed at respective positions associated with a plurality of respective copying speeds which are set according to copy paper sheets. Thus, a voltage to be applied between the transfer roller and the rear-surface electrode roller is maintained constant regardless of different copying speeds.
摘要翻译：一种转印辊装置，用于将形成在中间转印带上的全色调色剂图像转印到复印纸上。设置在与中间转印带位于其间的转印辊相反侧的后表面电极辊被分成多个气缸构件，并且至少一个气缸构件对应于复印纸的尺寸分别连接到地面。通过这种布置，消除了通过其中不携带复印纸的中间转印带的一部分产生过量电流，从而防止了成膜现象。在另一种布置中，多个后表面电极辊设置在与根据复印纸张设置的多个复印速度相关联的相应位置处。因此，不管不同的复印速度如何，在转印辊和后表面电极辊之间施加的电压保持恒定。

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