FLAT LID FOR LIQUID CONTAINING VESSELS

A flat top liquid carrying, paperboard container including four side panels, and inner and outer pairs of top closure panels alternately connected by respective horizontal score lines to the top edges of the four side panels as extensions thereof. While the inner pair of top closure panels each typically includes a substantially triangular panel portion and a pair of integrally connected fold-back panels, the outer pair consists of one shorter and one longer panel. A fold-over panel segment is formed on the end of the shorter panel. A diagonal opening-assist score line is formed on each of the shorter and longer panels, and a reverse diagonal opening-assist score line is formed on the fold-over panel segment extending from an end of the adjacent diagonal score line for lying on top of the latter when the fold-over panel segment is folded. A lift tab is formed on a side edge of the longer panel and extends past a portion of the edge of the adjacent fold-back panel. A perforated line for forming a tear strip extends from an edge of the lift tab across the longer panel to the diagonal opening assist score line thereon. When formed and sealed, the fold-over panel segment is confined between the edge portions of the longer and shorter panels. An extension is formed on one of the fold-back panels and sealed beneath the oppositely disposed fold-back panel.