Patent ID: 7130563
Filing Date: 2006-10-31
Classification: G03G

Abstract:
1. An apparatus for producing images comprising: a photoreceptor drum having a drum surface on which electrostatic latent images are produced and a flywheel attached to the revolving shaft of the photoreceptor drum; a developing unit for developing the electrostatic latent images on the photoreceptor drum by predetermined toner; a primary transfer unit having a transfer roller for transferring a toner image produced on the photoreceptor drum to an intermediate transfer belt; a secondary transfer unit having a secondary transfer roller for transferring the transferred toner image produced on the intermediate transfer belt to a recording medium; an intermediate transfer unit having the intermediate transfer belt and a drive roller for driving the intermediate transfer belt to circulate the intermediate transfer belt between the drive roller and the secondary transfer roller; and a revolving body drive unit for driving the drive roller and the photoreceptor drum by a series of gears, wherein the revolving body drive unit comprises: a motor for driving the drive roller and the photoreceptor drum; a motor drive gear attached to the shaft of the drive motor; an intermediate drive gear driven by the motor drive gear; a belt drive gear attached to the shaft of the drive roller and driven by the intermediate drive gear; and a drum drive gear attached to the revolving shaft of the photoreceptor drum and driven by the belt drive gear, the motor drive gear, the intermediate drive gear, the belt drive gear, and the drum drive gear are configured so as to rotate at gradually decreasing rotation speeds, and the transfer roller of the primary transfer unit is disposed between the drive roller and the secondary transfer roller, and pressed against the surface of the photoreceptor drum so that the intermediate transfer belt passes through between the transfer roller and the photoreceptor drum.