Bulk container with partial bellows bottom

Claim 1

A bottom for a bulk container having at least one cell with four side walls circumscribing the one cell, the bottom comprising three bottom panels hinged at horizontal score lines on the bottom edges of three of the four walls forming an end bottom panel and two side bottom panels on opposite sides of the end bottom panels, the two side bottom panels of said three bottom panels being hinged to the opposite sides of the end bottom panel of said three bottom panels by vertical score lines, said two side bottom panels having respective partial diagonal score lines extending at one end from the respective corners defined by the vertical and horizontal score lines, said two side bottom panels further having respective cuts extending from the distal edges of the side bottom panels to the other ends of the partial diagonal score lines such as to form partial bellows corners at the bottom end of the bulk container, a fourth bottom panel hinged on the bottom edge of the fourth side wall and free of the three bottom panels, said fourth bottom panel being sandwiched between the end bottom panel and fold-in portions defined by the partial diagonal score lines and cuts with the end bottom panel on top of the fourth bottom panel as the container sits upright, and said end bottom panel and said fourth bottom panel each extending more than one half but substantially less than all the distance across the bottom whereby together the end bottom panel and fourth bottom panel cover the bottom.