Box-like containers

Claim 1

A CASE FORMED OF A SINGLE WEB OF PAPER OF A BASE WEIGHT BETWEEN ABOUT 90 AND 200 AND HAVING FOUR PARALLEL CORNER LINES ALONG WHICH SUCH CASE CAN BE ERECTED FROM A FLATTENED COLLAPSED CONDITION INTO BOX-LIKE CONFIGURATION HAVING OPPOSITELY EXTENDING END FLAPS, WHICH END FLAPS CAN BE FOLDED INWARDLY FOR FORMATION OF A BOX-LIKE CONTAINER, THERE BEING FOUR REINFORCING STRIPS OF PAPER ADHERED TO THE INTERIOR OF THE CASE, ONE EACH OVER RESPECTIVE OF SUCH CORNER LINES, SUCH CASE HAVING A FIRST PAIR OF CORNER LINES POSITIONED ON OPPOSITE SIDE EDGES THEREOF WHEN IN A FLATTENED COLLAPSED CONDITION AND COMPRISING PRESSED EDGE FOLDS CONSISTING OF CORNER LINE REGIONS FOLDED 180* INTO FACE-TO-FACE ENGAGEMENT WITH ONE ANOTHER, AND HAVING A SECOND PAIR OF CORNER LINES POSITIONED TO BE DIAGONALLY OPPOSED TO ONE ANOTHER IN RESPONSE TO ERECTION OF THE CASE BUT SITUATED BETWEEN THE FIRST MENTIONED PAIR OF CORNER LINES WHEN THE CASE IS IN FLATTENED COLLAPSED CONDITION AND COMPRISING RESPECTIVELY: A CREASED CORNER LINE FORMED BY FOLDING THE WEB AND PRESSING TOGETHER PORTIONS OF THE WEB ON OPPOSITE SIDES OF SUCH CORNER LINE AND UNFOLDING SAME, AND A SCORED CORNER LINE REGION EMBODYING A PLURALITY OF CONTIGUOUS SCORES EXTENDING ALONG SUCH LINE, ONE OF THE LATTER SCORES BEING INVERTED, SUCH INVERTED SCORE COMPRISING A REVERSAL OF A PREVIOUSLY FORMED SCORE.