| 摘要 |
Electrophotographic copying machine comprising a discharge device for discharging the area of the movable photoconductive element which exceeds the area of the copy-sheet residing in the machine. The discharge device comprises a lamp and a mask interposed between the lamp and the photoconductive surface, the mask has a plurality of slots, each slot being associated to a copy-sheet format; each slot comprises a first portion for discharging the margin zones of the photoconductive element, which zones has a length equal to the difference between the width of the photoconductive element and a dimension of the copy-sheet format selected; and a second portion for discharging the entire width of the photoconductive element, the second portion is positioned in front of the lamp after that a length of the photoconductive element equal to the other dimension of the format has been moved in front of the discharge device. |
