| 摘要 |
PURPOSE:To copy a microfilm successively from the end to the head, by putting a mark to the end frame of a single unit of information group of the microfilm and then stopping the microfilm after detecting its end. CONSTITUTION:The 1st mark MK1 and the 2nd mark MK2 are put at the upper part and the lower part respectively for each frame of each information group KG which forms a unit. These two marks are read by the 1st and 2nd mark detectors 67 and 68 respectively. The mark MK1 is put to the end frames A2, B3 and C4 of each group KG; the marks MK1 and MK2 are put to the intermediate frames B2 and C3-C4; and the mark MK2 is put to the head frames A1, B1 and C1 respectively for the purpose of distinction. Thus the information is successively copied until the head frame is detected after detecting the end frame of a desired group KG. In such a way, a copy is obtained with the pages arranged properly. |
