Abstract: The image forming apparatus can retain a stable and high image quality for many hours without use of any high precise mechanical parts and without causing any non-uniformity and mal-registration in a color image. In the image forming apparatus, an image recording medium (photosensitive drum) (6a) is driven by a rotative driving mechanism (pulleys and belts) (40a); and an image recording section (print bar) (6c) records an image repeatedly on the rotating image recording medium (6a) in a direction perpendicular to a rotational direction of the image recording medium. The image recorded on the image recording medium (6a) is transcribed onto an image transcribing medium (paper) (22) being fed in the rotational direction of the image recording medium (6a) to form an image.

Abstract: A vibration absorber for rotating body of this invention comprises a disc capable of moving only in the horizontal direction accompanying the vibration of a pivot and an annular plate placed on the disc and capable of moving only in the vertical direction, the vibration energy of rotating body being absorbed by the shearing force of an oil film formed by the relative motion between the horizontally moving disc and the vertically moving annular plate.