Expansible corrugated paperboard carton

Claim 1

A GUSSET CARTON ADAPTED TO BE EXPANDED FROM AN INITIALLY FLAT-FOLDED CONTAINER INTO A RECTANGULAR CONTAINER OF BOXLIKE CONFIGURATION COMPRISING; A ONE-PIECE BLANK OF SINGLE-FACED CORRUGATED PAPERBOARD INCLUDING SUBSTANTIALLY RECTANGULAR FRONT AND BACK PANELS OVERLYING EACH OTHER, SIDE WALLS HINGED TO THE RESPECTIVE OUTBOARD EDGES OF SAID FRONT AND BACK PANELS ALONG PAIRS OF LONGITUDINAL FOLDS, EACH OF SAID SIDE WALLS HAVING A LONGITUDINAL REVERSE FOLD INTERMEDIATE EACH PAIR OF LONGITUDINAL FOLDS TO FORM INWARDLY-FOLDED LATERAL PANEL SECTIONS OVERLYING EACH OTHER BETWEEN SAID FRONT AND BACK PANELS, A BOTTOM HINGED TO THE LOWER EDGES OF SAID FRONT AND BACK PANELS ALONG A PAIR OF TRANSVERSE FOLDS AND HAVING AN INTERMEDIATE TRANSVERSE FOLD THEREBETWEEN TO FORM OUTWARDLYFOLDED BOTTOM PANEL SECTIONS OVERLYING EACH OTHER, SAID FRONT PANEL INCLUDING WINGS WITH SEALED OVERLAPPING MARGINAL EDGES AT THE CENTRAL PORTION THEREOF, SAID BOTTOM INCLUDING A BOTTOM SEAL FLAP HAVING FLATTENED CORRUGATED FLUTES ADHESIVELY SECURED TO THE LOWER MARGINAL EDGE OF SAID FRONT PANEL, DIAGONALLY-SCORED GUSSET PORTIONS DOWNWARDLY DEPENDING FROM THE RESPECTIVE LATERAL PANEL SECTIONS ALONG CONTINUATIONS OF THE TRANSVERSE FOLD CONNECTING SAID BOTTOM WITH SAID BACK PANEL AND TERMINATING ALONG A LINE REGISTERING WITH THE TRANSVERSE FOLD INTERMEDIATE SAID BOTTOM PANEL SECTIONS, ADJACENT GUSSET PORTIONS BEING HINGED TO EACH OTHER AND THE GUSSET PORTIONS NEXT ADJACENT THE BOTTOM PANEL SECTION WHICH IS HINGED