Method of manufacturing packaging container and packaging container

Abstract

A packaging container including a top wall and a bottom wall that are substantially horizontal when the packaging container is straight, and-side walls. The top wall and the bottom wall have a triangular shape, and a section of a transverse direction of a main body of the packaging container formed in three ridgelines which connect three corner points of the top wall and three corner points of the bottom wall has triangular shape.

1 . A packaging container, comprising:
 a top wall and a bottom wall that are substantially horizontal when the packaging container is straight; and   side walls between the top wall and the bottom wall, wherein   the top wall and the bottom wall have a triangular shape, and a section of a transverse direction of a main body of the packaging container formed in three ridgelines which connect three corner points of the top wall and three corner points of the bottom wall has triangular shape.   
     
     
         2 . The packaging container according to  claim 1 , further comprising an opening for an opening device on the top wall. 
     
     
         3 . A method of manufacturing a packaging container, comprising:
 forming a web-like packaging material having crease lines into a tube shape by longitudinal sealing;   filling the tube shaped packaging material with a liquid product;   sealing the tube shaped packaging material in a transverse direction to form pillow shaped packaging bodies;   cutting the packaging bodies individually;   folding the packaging body along the crease lines to form a top wall, side walls, and a bottom wall; and   attaching one or more fins and flaps to the top wall, bottom wall, or side walls to form a final shape, wherein   the top wall and the bottom wall are substantially horizontal when the packaging container is straight, wherein the top wall and the bottom wall have a triangular shape, and a section of a transverse direction of a main body of the packaging container formed in three ridgelines which connect three corner points of the top wall and three corner points of the bottom wall is triangular, wherein   during the filling, the liquid product is filled to a volume equivalent to a constant volume of the final shaped packaging container and a cross-sectional area in the tube shaped packaging material is reduced, the constant volume is maintained during the sealing, and during the forming, the container wall of the packaging body is deformed and the constant volume is maintained.