Provided is a processing device for flanged containers that can align directions of the flanged containers and reduce the size of an aggregate state. A conveying conveyor 15 for conveying a portion pack 10 provided with a directional flange 14 at an upper part of the container body 13 is provided with a plurality of support parts 24 formed with groove parts into which the flange 14 is fitted and supporting the portion pack 10 at predetermined intervals. An imaging means for imaging the portion pack 10 supported and carried by the support part 24 of the carrying conveyor 15 from above, a detection part for detecting the direction of the flange 14 on the basis of image information obtained by imaging by the imaging means, and a plurality of direction correction means 18 for sucking the lower surface of the portion pack 10 supported by each support part 24...

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