| 摘要 |
PURPOSE:To obtain copies having no distortions in images by blowing air flow toward the cylindrical member surface of an exposure part and bringing a sheet material part, which is conveyed and passed through the exposure part by turning of the cylindrical member, into tight contact with the cylindrical by the wind pressure of the air flow. CONSTITUTION:Transparent glass 23 of an exposure part E is removed by an air flow blowing nozzle 30 and the air flow through the nozzle 30 is acted upon the drum surface region of the part E. Air is fed through a conduit 301, and the air is blown out roughly uniformly from each part of a slender opening 31 and acts roughly uniformly upon each part in the longitudinal direction of the drum of the part E. If the intensity of the air flow is set at the value suited for the intensity of the stiffness of an original, the trailing end of the original ends passing through the exosure part E while held retained to the drum 4 surface by the wind pressure of the air flow through the nozzle 30 in succession after said trailing end edge passes through the 1st rubber roller 13 and the pressure by the rubber roller 13 on the original toward the drum 4 surface is lost. |
