| 摘要 |
PROBLEM TO BE SOLVED: To provide a packaging sheet, a package and inspection equipment for the package capable of detecting a sealed state of a center seal part of the package formed by a horizontal pillow system or the like by visual inspection and image processing.SOLUTION: A first rectangular reference mark 15 extending in a lateral direction is printed within one side edge 4 of a packaging sheet 1, and a second circular reference mark 16 is printed inside the other side edge 5. If the side edge 4 and the side edge 5 of the packaging sheet 1 match when forming a center seal part 31 of the package, the second reference mark 16 may face the lateral center of the first reference mark 15. Whether there exists a seal defect in the center seal part 31 can be inspected by visually observing the first reference mark 15 and the second reference mark or measuring relative positions of the first reference mark 15 and the second reference mark 16 by image processing. |
