| 摘要 |
<p>PURPOSE:To stabilize a light amt. required for writing a latent image for a long term by installing an adsorbing member for catching a suspending toner through a magnetic or electrostatic attraction near a selfoc lens. CONSTITUTION:A suspending toner is attracted by electrostatic attraction and effectively caught with an adsorbing member 3 protruding forward from the front of a selfoc lens 2 in order to keep the front face of the lens 2 clean, prevent deterioration of a light amt. illuminating through the lens 2 and scattering of the light, and stabilize the light amt. of LED for writing a latent image for a long term. Or a magnetic adsorbing member 3 is installed near the lens 2 between the lens 2 and a developing device 6 to catch the toner attaching to the front face of the lens 2 and keep it clean. Since the suspending toner is caught with the member 3, the condensing lens 2 of the LED is not stained with the toner and prevented from deterioration and scattering of its light transmittance, thus permitting lont-term stabilization of LED intensity for writing the latent image.</p> |
