Temperature control for a fixing apparatus
    1.
    发明授权
    Temperature control for a fixing apparatus 失效
    定影装置的温度控制

    公开(公告)号:US5960233A

    公开(公告)日:1999-09-28

    申请号:US754473

    申请日:1996-11-25

    IPC分类号: B41J2/41 G03G15/00 G03G15/20

    CPC分类号: G03G15/2003

    摘要: A timer for measuring the image formation interval, and the fixing temperature is set in response to the measured image formation interval so as to balance satisfactorily the degree of fixation, the amount of the recording material curling, and the recording material wrinkling no matter what timing is used to start the next image formation after the completion of the preceding one.

    摘要翻译: 用于测量图像形成间隔的定时器和定影温度是响应于所测量的图像形成间隔而设定的,以便令人满意地平衡固定的程度,记录材料卷曲的量和记录材料起皱,而不管什么时间 用于在前一个完成之后开始下一个图像形成。

    Color image forming apparatus wherein plural colors can be formed
through one printing cycle
    5.
    发明授权
    Color image forming apparatus wherein plural colors can be formed through one printing cycle 失效
    可以通过一个打印周期形成多种颜色的彩色图像形成装置

    公开(公告)号:US5066979A

    公开(公告)日:1991-11-19

    申请号:US463443

    申请日:1990-01-11

    IPC分类号: G03G15/01 G03G15/09

    CPC分类号: G03G15/0121 G03G15/0907

    摘要: An image forming apparatus is provided with a latent image forming member for forming first and second electrostatic latent images on an image bearing member. A first developer forms a first visualized image by developing the first electrostatic latent image, and a second developer provides a second visualized image by developing the second electrostatic latent image. The second developer acts on the image bearing member after the first visualized image is formed on the image bearing member, and the second developer includes a developer carrier for carrying a developer to a developing position where the developer is supplied to the image bearing member. A vibratory voltage is applied to the developer carrier of the second developer. A controller changes a duty ratio of the vibratory voltage. The vibratory voltage has a first peak for forming an electric field to urge the developer away from the developing carrier toward the image bearing member and a second peak for forming an electric field to urge the developer away from the image bearing member toward the developer carrier. The first peak and second peak are alternately applied, and the controller changes a duty ratio while maintaining the second peak substantially constant. Furthermore, the controller changes the duty ratio by changing the first peak.

    Electrophotographic method and apparatus for providing accurate
half-tone images
    7.
    发明授权
    Electrophotographic method and apparatus for providing accurate half-tone images 失效
    用于提供准确的半色调图像的电子照相方法和装置

    公开(公告)号:US4494856A

    公开(公告)日:1985-01-22

    申请号:US410061

    申请日:1982-08-20

    IPC分类号: G03G15/045 G03G15/22

    CPC分类号: G03G15/045

    摘要: An electrophotographic method and apparatus is disclosed which is able to faithfully reproduce the half-tone portion of an original image on a photosensitive medium having an electroconductive layer, a photoconductive layer and an insulating surface layer. The present invention is directed particularly to improvements in the secondary charging step in the above method. According to the invention, the process of secondary charge includes the steps of subjecting the photosensitive medium to the action of corona discharge having the component of opposite polarity to that of the primary charge with simultaneous light image exposure, exposing the photosensitive medium surface to a light image while reducing or stopping the action of corona discharge and exposing the photosensitive medium surface to a light image while controlling the amount of corona discharge.

    摘要翻译: 公开了一种能够忠实地再现具有导电层,光电导层和绝缘表面层的感光介质上的原始图像的半色调部分的电子照相方法和装置。 本发明特别涉及上述方法中二次充电步骤的改进。 根据本发明,二次充电的过程包括以下步骤:使光敏介质经受电晕放电的作用,其具有与主电荷相反极性的分量,同时进行光图像曝光,将光敏介质表面暴露于光 同时减少或停止电晕放电的动作,并且将光敏介质表面暴露于光图像同时控制电晕放电量。

    Image forming apparatus having a ventilated image forming unit
    10.
    发明授权
    Image forming apparatus having a ventilated image forming unit 失效
    具有通风图像形成单元的图像形成装置

    公开(公告)号:US5038174A

    公开(公告)日:1991-08-06

    申请号:US575370

    申请日:1990-08-30

    摘要: An image forming apparatus has an image forming unit which is detachably mounted in the stationary main part of the apparatus. The unit includes an image carrier with a photosensitive layer, a charging device capable of electrostatically charging the image carrier in contact therewith, and a housing supporting the image carrier and the charging device and provided with an exposure opening. An air flow is positively formed such that, with the image forming unit mounted in a predetermined mounting portion in the apparatus, air flows from regions near both ends of the image carrier towards the exposure opening past a region where the charging device contacts the image carrier. With this arrangement, ozone generated in the image forming unit due to operation of the contact type charging device is efficiently carried away from the image forming unit, thus eliminating generation of image defects attributable to presence of ozone and other discharge products.

    摘要翻译: 图像形成装置具有可拆卸地安装在装置的固定主要部分中的图像形成单元。 该单元包括具有感光层的图像载体,能够使图像载体与其接触地静电充电的充电装置,以及支撑图像载体和充电装置并具有曝光开口的壳体。 空气流被积极地形成,使得在图像形成单元安装在装置中的预定安装部分中的情况下,空气从图像载体的两端附近的区域朝向曝光开口流过经过充电装置接触图像载体的区域 。 利用这种布置,由于接触式充电装置的操作而在图像形成单元中产生的臭氧被有效地从图像形成单元传送出去,从而消除了由臭氧和其它放电产物的存在引起的图像缺陷的产生。