Color image forming apparatus wherein plural colors can be formed
through one printing cycle
    1.
    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.

    Image forming device
    3.
    发明授权
    Image forming device 失效
    图像形成装置

    公开(公告)号:US5264902A

    公开(公告)日:1993-11-23

    申请号:US4676

    申请日:1993-01-14

    IPC分类号: G03G15/20

    CPC分类号: G03G15/206

    摘要: The image forming device of the present invention relates to an image forming device having a moving member which moves while pressing a recording material against an image carrying member as the means of transferring the image on the image carrying member to the recording material. Further, the image forming device has a pair of moving members for fixing the image by conveying the recording material sandwiched therebetween, of which the moving member on the side not in contact with the unfixed image is a moving member having an elastic material layer and a resin surface layer. Further, the present invention has the surface of the moving member of the fixing member on the side not in contact with the unfixed image which is better mold releasability with that of the moving member of the image forming device.

    摘要翻译: 本发明的图像形成装置涉及一种图像形成装置,其具有移动构件,该移动构件作为将图像承载构件上的图像转印到记录材料的装置而将记录材料压靠在图像承载构件上移动。 此外,图像形成装置具有一对移动构件,用于通过传送夹在其间的记录材料来固定图像,其中与未定影图像不接触的一侧的移动构件是具有弹性材料层的移动构件和 树脂表面层。 此外,本发明的固定构件的移动构件的表面不与未定影图像接触的一侧,其与图像形成装置的移动构件的脱模性更好。

    Image forming apparatus having a ventilated image forming unit
    6.
    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。

    Image forming apparatus
    9.
    发明授权
    Image forming apparatus 失效
    图像形成装置

    公开(公告)号:US5032852A

    公开(公告)日:1991-07-16

    申请号:US469162

    申请日:1990-01-24

    IPC分类号: G03G15/01 G03G15/09

    CPC分类号: G03G15/0126 G03G15/0928

    摘要: The present invention provides an image forming apparatus comprising a first developing device for developing a first latent image to form a first toner image, a second developing device for acting on an image bearing member on which the first toner is formed to develop a second latent image thereby creating a second toner image, and an antioxidant material layer provided on a surface of a developing sleeve of the second developing device.

    摘要翻译: 本发明提供了一种图像形成装置,包括用于显影第一潜像以形成第一调色剂图像的第一显影装置,用于作用在图像承载部件上的第二显影装置,在其上形成第一调色剂以形成第二潜像 从而产生第二调色剂图像,以及设置在第二显影装置的显影套筒的表面上的抗氧化剂材料层。