| 摘要 |
For producing a plurality of copies of an original document which has a length less than one-half a maximum document length which can be accomodated by the apparatus, a plurality of electrostatic images are formed on a rotating photoconductive drum by alternately forming an image on one image space and letting one or more image spaces pass before forming the next image. Development and transfer of the electrostatic images are effected during a last imaging revolution of the drum and may be further effected during subsequent revolutions of the drum for repeated development and transfer using the same electrostatic images. The number of electrostatic images formed on the drum is computed as a function of the length of the original document and the number of copies to be made to minimize the number of revolutions of the drum required to produce the copies and thereby maximize the copying speed. The number of electrostatic images formed is not necessarily the maximum number which can be formed on the drum.
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