Pillow Packaging Bag, Pillow Type Packaged Body, Heat Seal Bar for Pillow Packaging Machine, and Pillow Packaging Machine

A pillow type packaging machine comprising:

• a vertical seal forming device configured to form vertical seals by heat sealing overlapped ends of a cylindrically shaped film;
• and
• a lateral seal forming device, arranged downstream of the vertical seal forming device in the film feeding direction, configured to form lateral seals by laterally heat sealing prescribed regions in the film cylindrically shaped by the vertical seal forming device in the lateral direction, wherein the lateral seal forming device is a heat sealing bar comprising:
• a pressurizing face;
• and
• a linear seal forming portion comprising:
• a plurality of linear convexes extending in the lateral direction in the prescribed regions on the pressurizing face and configured to form the lateral seals, wherein at least one of the plurality of linear convexes is a first linear convex extending over the full width while others of the plurality of linear convexes are second linear convexes positioned on two sides along the first linear convexes in a film feeding direction, and wherein both ends of the second linear convexes are positioned closer to a central portion in the lateral direction than both ends of the first linear convexes;
• and
• a linking convex configured to connect all ends of the second linear convexes and an adjacent first linear convex on both sides in the film feeding direction.