| 摘要 |
Printed matter (1) printed by a sheet-fed printer is illuminated on an impression cylinder (2) by illuminating means (13) and is pressed by air injection means (15) against the impression cylinder (2). When the light reflected on the printed matter (1) is detected by the photographing means (14) to import image information of the printed matter (1), the photographing means (14) has a photo position (P) on the printed matter (1) linearly along an axis of the impression cylinder (2); the illuminating means (13) condenses the illumination light into line along the axis of the impression cylinder (2) and in conformity with the photo position (P) on the printed matter (1), the air injection means (15) stably pressing the printed matter (1) at the photo position (P) on the printed matter against the impression cylinder (2) so as to photograph a whole surface of the printed matter (1) from photo-start to photo-end positions. <IMAGE>
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