To provide an easily unsealable serial packaging bag into which contents can be put at high speed, and which protects the contents well, have superior unsealing performance, and generate less refuse when scrapped after being used.
A bag body film roll and a lid material film roll having easy peelability are set on a bag-making filling machine. Turnbacks in a film-flow direction are formed on right/left side faces of the bag body film to form a slot-shaped content storage part, in which contents are placed intermittently in series at prescribed positions. Flat outward seal parts in the film-flow direction are formed on top right/left side edges of the bag body film, and the right/left side edges in the film-flow direction of the lid material film are superposed on the seal parts. The bag body film and the lid material film are heat-sealed between respective placed contents via seal parts that are formed perpendicular to the film-flow direction at prescribed positions in the film-flow direction to form sealed packaging bags, the series of which are cut apart in a given number.
KAWAI HIROFUMI
NAGAE MINORU
TERAYAMA TAKU
MATSUO KAZUHIKO
UEDA TOSHITOMO
