PROBLEM TO BE SOLVED: To display on display means the image of an article so that a position of the article can be intuitively known which is supplied in a cylindrical film with a prescribed interval, corresponding to the position of the cylindrical film of every one packaging cycle.;SOLUTION: A first transmission image 64 showing an article obtained by image processing the detection value of a transmission amount of the X-ray in a first detection area, and a second transmission image 66 showing a biting article of a longitudinal seal part obtained by image processing the detection value of the transmission amount of the X-ray in a second detection area, are displayed on the inspection image display part 62 of input/display means 54. On a timing image display part 68 provided in parallel to the inspection image display part 62, an identification image is displayed in a form of a timing diagram 70 allowing discrimination of a starting edge from an end edge of an area having the possibility of biting the article in the relation of a lateral sealing position by lateral sealing means, according to the film length of one package amount carried in one packaging cycle. The transmission images 64, 66, and the timing diagram 70 are movingly displayed following carriage of the cylindrical film.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2019,JPO&INPIT
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