Production method for pleated film, and production method of pleated packaging body

摘要

A production method for a pleated film according to the present invention includes an introduction step for moving an elongated film for use as a packaging body and introducing the film into a gap between a pair of pleat-forming plates disposed with a gap therebetween so that respective inner surfaces of the film oppose each other, a fixing step for fixing the film to the pair of pleat-forming plates, and a step for forming a pleat extending in a latitudinal direction of the film by closing the gap between the pair of pleat-forming plates, wherein sealing bars are provided on the pair of pleat-forming plates on opposing surfaces of the pleat-forming plates.