| 摘要 |
An image forming apparatus includes a latent image carrier having a movable surface, and a stationary contact brush charger for electrostatically charging the surface of the latent image carrier in contact therewith during a movement of the carrier surface relative to the brush charger. In this apparatus, the contact time t, during which any arbitrarily chosen point on the carrier surface then moving in one direction is held in contact with the brush charger, and the electric resistance R of each of the brush bristles forming the brush charger are chosen such that the product of the contact time t multiplied by the common logarithm of the electric resistance R, i.e., (txlog10R), is within the range of 0.9 to 4.6.
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