Paper bag of simplified structure adapted to be retained in each of the opened and the folded configurations

Claim 2

A paper bag according to claim 2, characterized by: all of said four side, front and rear panels being provided with aligned horizontal lines in the upper portions of said panels so as to be spaced from the open top edges and also from said first occurring horizontal folding lines formed in the lower portions of said panels, wherein said side panels are provided with inclined folding lines extending inwardly from the corners of the open top edges of said side panels in such a way that those extending from the corners of the same side edge of each of said side panels join each other at the point of juncture of said secondly occurring horizontal folding lines formed in the upper portions of said side panel and said intermediate vertical folding line formed in said side panel, and said inclined folding lines being quite symmetrical with those in the lower portions of said panels, so that the paper bag may fold not only along said vertical folding lines, but also along said inclined folding lines in such a way that said inclined lines in each pair of opposing or corresponding lines in the upper and lower portions of said side panels are brought closer to each other, respectively, and said paper bag can be folded in opposite directions along said horizontal folding lines in the upper and lower portions of said front and rear panels so as to close the open top of said paper bag completely.