Paperboard for packing cases

Abstract

After adhering the adhesive allowance part to the right side face part of this article, the first to fourth piece parts are combined to form a box shape. Further, after bending the left and right flap parts inward respectively, the inner lid part is bent inward, and while bending the insertion piece of the outer lid part inward and inserting it into the slits formed in the left and right side face parts, the outer lid part is bent inward, which is a paperboard for a packaging box used as a packaging box.

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