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    Image forming apparatus and method for controlling image density
    51.
    发明授权
    Image forming apparatus and method for controlling image density 有权
    用于控制图像密度的图像形成装置和方法

    公开(公告)号：US08503893B2

    公开(公告)日：2013-08-06

    申请号：US12714790

    申请日：2010-03-01

    申请人： Akira Yoshida ,  Nobutaka Takeuchi ,  Shin Hasegawa ,  Yoshiaki Miyashita ,  Kohta Fujimori ,  Kayoko Tanaka

    发明人： Akira Yoshida ,  Nobutaka Takeuchi ,  Shin Hasegawa ,  Yoshiaki Miyashita ,  Kohta Fujimori ,  Kayoko Tanaka

    IPC分类号： G03G15/08

    CPC分类号： G03G15/0851 ,  G03G15/0849 ,  G03G15/0853 ,  G03G2215/0607

    摘要： An image forming apparatus includes a developer unit to store two-component developer which includes toner and carrier and develop an electrostatic latent image formed on the image carrier, a toner concentration detector to detect toner concentration in the developer unit, a toner supply unit to supply toner to the developer unit, and a controller to control toner supply amount by controlling the toner supply unit by comparing an output value of the toner concentration detector with a reference value stored in a memory and correcting difference between output values of the toner concentration detector at two or more process linear velocities in accordance with the toner concentration in the developer unit. A compensation amount for correcting difference between output values of the toner concentration detector that differ depending on the process linear velocity is adjustable in accordance with the toner concentration in the development unit.

    摘要翻译： 图像形成装置包括：显影单元，用于存储包括调色剂和载体的双组分显影剂，并显影形成在图像载体上的静电潜像;调色剂浓度检测器，用于检测显影单元中的调色剂浓度;调色剂供应单元， 调色剂到显影剂单元，以及控制器，通过将调色剂浓度检测器的输出值与存储在存储器中的参考值进行比较来控制调色剂供应单元来控制调色剂供应量，并且校正调色剂浓度检测器的输出值之间的差异 根据显影剂单元中的调色剂浓度的两个或多个过程线速度。 用于校正根据处理线速度不同的调色剂浓度检测器的输出值之差的补偿量根据显影单元中的调色剂浓度而调节。

    Image forming apparatus with a two component developer, toner density detection and toner density correction
    56.
    发明授权
    Image forming apparatus with a two component developer, toner density detection and toner density correction 有权
    具有双组分显影剂的图像形成装置，调色剂浓度检测和调色剂浓度校正

    公开(公告)号：US07809291B2

    公开(公告)日：2010-10-05

    申请号：US11558674

    申请日：2006-11-10

    申请人： Nobutaka Takeuchi ,  Shinji Kato ,  Shin Hasegawa ,  Kouta Fujimori ,  Kayoko Tanaka ,  Yushi Hirayama ,  Takashi Enami ,  Kazumi Kobayashi ,  Kiichiro Shimizu

    发明人： Nobutaka Takeuchi ,  Shinji Kato ,  Shin Hasegawa ,  Kouta Fujimori ,  Kayoko Tanaka ,  Yushi Hirayama ,  Takashi Enami ,  Kazumi Kobayashi ,  Kiichiro Shimizu

    IPC分类号： G03G15/08

    CPC分类号： G03G15/5041 ,  G03G15/0849 ,  G03G15/0853

    摘要： An image forming apparatus in which a predetermined image density can be obtained by correcting a toner density control target value without consuming toner. The output value Vt of the magnetic permeability sensor and the target output value Vtref are compared, and the toner density is controlled by controlling a powder pump on the basis of the comparative result thereof so that the output value Vt approximates the target output value Vtref. In addition, the target output value Vtref is corrected on the basis of the detected result of the image coverage ratio so as to maintain a predetermined development potential of the development apparatus. By virtue of this, even when image forming that involves a significant change in the toner replacement amount in the development apparatus is performed, for example, even when an image of high image coverage ratio is output, the toner density is adjusted to maintain the development capability at a constant, and a predetermined image density is ensured. Moreover, because the image coverage ratio can be detected without consuming toner, toner does not need to be consumed when the target output value Vtref is corrected.

    摘要翻译： 通过在不消耗调色剂的情况下校正调色剂浓度控制目标值，可以获得预定图像浓度的图像形成装置。 比较磁导率传感器的输出值Vt和目标输出值Vtref，并根据其比较结果控制粉末泵来控制调色剂浓度，使得输出值Vt近似于目标输出值Vtref。 此外，基于图像覆盖率的检测结果来校正目标输出值Vtref，以保持显影装置的预定显影电位。 由此，即使在进行显影装置中的调色剂更换量的显着变化的图像形成的情况下，即使输出高图像覆盖率的图像，也可以调整调色剂浓度以保持显影 能力恒定，并且确保了预定的图像浓度。 此外，由于可以在不消耗调色剂的情况下检测图像覆盖率，当校正目标输出值Vtref时，不需要消耗调色剂。

    Image forming method and apparatus with improved conversion capability of amount of toner adhesion
    59.
    发明授权
    Image forming method and apparatus with improved conversion capability of amount of toner adhesion 有权
    具有提高调色剂附着量的转换能力的图像形成方法和装置

    公开(公告)号：US07551866B2

    公开(公告)日：2009-06-23

    申请号：US11477673

    申请日：2006-06-30

    申请人： Naoto Watanabe ,  Shin Hasegawa ,  Hideki Kamaji ,  Shinji Kato ,  Hitoshi Ishibashi ,  Kohta Fujimori ,  Kayoko Tanaka ,  Yuushi Hirayama ,  Takashi Enami ,  Shinji Kobayashi ,  Kazumi Kobayashi ,  Fukutoshi Uchida ,  Noboru Sawayama

    发明人： Naoto Watanabe ,  Shin Hasegawa ,  Hideki Kamaji ,  Shinji Kato ,  Hitoshi Ishibashi ,  Kohta Fujimori ,  Kayoko Tanaka ,  Yuushi Hirayama ,  Takashi Enami ,  Shinji Kobayashi ,  Kazumi Kobayashi ,  Fukutoshi Uchida ,  Noboru Sawayama

    IPC分类号： G03G15/00

    CPC分类号： G03G15/5058 ,  G03G2215/00042 ,  G03G2215/00059 ,  G03G2215/0119

    摘要： An image forming method and apparatus capable of implementing accurately and constantly an improved conversion of the amount of toner adhesion over the entire range of the amount of adhesion. The method includes the steps of computing a normalization value as a relative output ratio of the regular reflection output to a background regular reflection component from the surface extracted from the regular reflection light, in which the regular reflection output is obtained by detecting a plurality of gradation toner patterns with a sensor configured to simultaneously detect regular reflection light and diffuse reflection light; obtaining a diffuse reflection output conversion factor by either (1) subtracting the normalization value multiplied by the diffuse reflection output voltage generated by the surface from the diffuse reflection output voltage, or (2) subtracting the normalization value multiplied by a diffuse reflection output voltage increment, which is computed as the difference between the diffuse reflection output voltage and another diffuse reflection output voltage obtained when a light emitting device is turned off, from the diffuse reflection output voltage increment; and subjecting the relation between the diffuse reflection output conversion factor and the amount of adhesion to a polynomial approximation.

    摘要翻译： 一种图像形成方法和装置，其能够在粘合量的整个范围内精确地和持续地实现调色剂粘附量的改进转换。 该方法包括以下步骤：从通过从正反射光提取的表面计算正规反射输出与背景常规反射分量的相对输出比的归一化值，其中通过检测多个等级获得正则反射输出 具有传感器的调色剂图案被配置为同时检测正常反射光和漫反射光; 通过（1）从扩散反射输出电压减去由表面产生的漫反射输出电压的归一化值，或（2）减去乘以漫反射输出电压增量的归一化值，获得漫反射输出转换因子 ，其被计算为漫反射输出电压与发光装置关闭时获得的另一漫反射输出电压之间的差; 并将漫反射输出转换因子与粘附量之间的关系进行多项式近似。

    Image forming device including a toner pattern forming unit
    60.
    发明授权
    Image forming device including a toner pattern forming unit 有权
    图像形成装置，包括调色剂图案形成单元

    公开(公告)号：US07664413B2

    公开(公告)日：2010-02-16

    申请号：US11600712

    申请日：2006-11-17

    申请人： Kazumi Kobayashi ,  Kohta Fujimori ,  Shin Hasegawa ,  Nobutaka Takeuchi ,  Takashi Enami ,  Kiichirou Shimizu

    发明人： Kazumi Kobayashi ,  Kohta Fujimori ,  Shin Hasegawa ,  Nobutaka Takeuchi ,  Takashi Enami ,  Kiichirou Shimizu

    IPC分类号： G03G15/00 ,  G03G15/01 ,  G03G15/16

    CPC分类号： G03G15/0131 ,  G03G15/5058 ,  G03G2215/00059 ,  G03G2215/0161

    摘要： An image forming device includes a toner pattern forming unit that forms a first toner pattern and a second toner pattern downstream of the first toner pattern along a direction of advance of an intermediate transfer belt on the intermediate transfer belt. The first toner pattern is configured to include color patches of which a color density gradually differs so that, when detected by a sensor, a fluctuation of a toner density is adjusted by a feedback data. The second toner pattern is configured to prevent a cleaning blade from being twisted by a friction of the intermediate transfer belt due to the toner lubrication.

    摘要翻译： 图像形成装置包括调色剂图案形成单元，其沿着中间转印带上的中间转印带的前进方向形成第一调色剂图案和第一调色剂图案下游的第二调色剂图案。 第一调色剂图案被配置为包括颜色密度逐渐变化的色标，使得当由传感器检测时，通过反馈数据调节调色剂浓度的波动。 第二调色剂图案被配置为防止由于调色剂润滑而导致中间转印带的摩擦而导致的清洁刮板扭曲。