Bend-open package and method for manufacturing bend-open package

A method for manufacturing a bend-open package including a package body configured to store content, the package body being at least partially a flat member including a bend portion that is bendable for being folded into two, and a sealant press-bonded to a surface of the flat member to cover an opening in the bend portion, the sealant being configured to rupture and open in accordance with bending of the bend portion, the method comprising in sequence:

• forming a plurality of openings in a surface of a flat member strip at predetermined intervals in a longitudinal direction of the strip;
• press-cutting, with a sealant press-cutting unit, a sealant member strip into sealants each sized and shaped to cover one of the openings, and press-bonding the sealant that has been press-cut from the sealant member strip to the surface of the flat member to cover the opening;
• and
• press-bonding a periphery of the sealant embedded in the surface of the flat member with the sealant press-cutting unit, and forming a protrusion on the surface of the flat member along an edge of the sealant, the protrusion having a height smaller than a thickness of the sealant and smaller than a height of the sealant.

A bend-open package, comprising:

• a package body configured to store content, the package body being at least partially a flat member including a bend portion that is bendable for being folded into two;
• a sealant press-bonded to a surface of the flat member to cover an opening in the bend portion, the sealant being configured to rupture and open in accordance with bending of the bend portion, the sealant having a periphery with at least a pair of facing edges embedded in and press-bonded to the surface of the flat member in a thickness direction of the flat member;
• and
• a protrusion located on the surface of the flat member along the edges of the sealant, the protrusion protruding outwardly from the edges of the sealant embedded in the flat member.

A method for manufacturing a bend-open package including a package body configured to store content, the package body being at least partially a flat member including a bend portion that is bendable for being folded into two, and a sealant press-bonded to a surface of the flat member to cover an opening in the bend portion, the sealant being configured to rupture and open in accordance with bending of the bend portion, the method comprising in sequence:

• forming a plurality of openings in a surface of a flat member strip at predetermined intervals in a longitudinal direction of the strip;
• press-cutting, with a sealant press-cutting unit, a sealant member strip into sealants each sized and shaped to cover one of the openings, and press-bonding the sealant that has been press-cut from the sealant member strip to the surface of the flat member to cover the opening;
• and
• press-bonding a periphery of the sealant embedded in the surface of the flat member in a thickness direction, and forming a protrusion on the surface of the flat member along an edge of the sealant embedded in the flat member, the protrusion protruding outwardly from the edge of the sealant.