| 摘要 |
PURPOSE:To prevent the missing of a copied image and the appearance of black in the back of sheet by controlling a timing in the way that the copied image leading edge of an original first page and the leading edge of sheet front are made coincided, and the copied image trailing edge of an original second page and sheet back trailing edge are made coincided when the measured value of original total length is shorter than standard length. CONSTITUTION:The total length 2L1 of an original 2a put on an original platen 1 is measured, and the measured value 2L1 is compared with the specified standard length 2L. If the measured value 2L1 is shorter than the standard length 2L, the copied image leading edge of the first page of the original 2a and the leading edge of the sheet front are made coincided, and an exposure timing and a sheet feeding timing are controlled in the way that the copied image trailing edge of the second page of the original 2a and the sheet back trailing edge are made coincided. Thus, in a mode in which page-continuous copying and both-side copying are performed, the missing of the copied image of the second page of sheets and the black of the right side edge of the image of said page can be prevented even if originals are book-styled, and high copying quality can be obtained. |
