Method of and device for setting up gusset-cornered folding boxes from flat blanks

Claim 1

A DEVICE FOR SETTING UP GUSSET CORNERED FOLDING BOXES FROM FLAT BOX BLANKS, THE DEVICE COMPRISING, A PREFOLDING MEMBER WHOSE BLANK ENGAGING BOTTOM PORTION IS OF THE GENERAL SHAPE OF AN INVERTED TRUNCATED PYRAMID AND COMPRISES A CENTRAL FLAT BOTTOM PORTION CORRESPONDING TO THE BOTTOM PORTION OF THE BLANK TO BE FOLDED AND DEFINED BY AT LEAST TWO SPACED PARALLEL FOLDING RULES AND CORNER RULES ARRANGED IN V-SHAPE AT CORNERS OF THE BOTTOM PORTION, THE BOTTOM EDGES OF THE CORNER RULES BEING UPWARDLY SLANTED FROM THE APEX OF THE V IN A DIRECTION AWAY FROM THE SAID BOTTOM PORTION; A PREFOLDING DIE COMPRISING A PAIR OF UPRIGHT OUTER SIDE FOLDING ELEMENTS SPACED APART WIDER THAN THE MAIN SIDE FOLDING ELEMENTS OF THE MAIN DIE HEREINAFTER RECITED, AND A PAIR OF UPRIGHT OUTER END FOLDING ELEMENTS SPACED APART WIDER THAN THE MAIN END FOLDING ELEMENTS OF THE MAIN DIE HEREINAFTER RECITED; A GUSSET FOLDING ELEMENT TALLER THAN SAID OUTER SIDE FOLDING ELEMENTS AND SAID OUTER END FOLDING ELEMENTS, SAID GUSSET FOLDING ELEMENTS BEING STATIONARY WITH RESPECT TO SAID PREFOLDING DIE AND LOCATED TO ENGAGE THE GUSSET PORTIONS OF THE BLANK WITHIN THE AREAS OF SAID V''S BEFORE THE REMAINDER OF THE BLANK IS ENGAGED BY SAID OUTER SIDE FOLDING ELEMENTS AND SAID OUTER END FOLDING ELEMENTS; A MAIN FOLDING DIE COMPRISING MAIN SIDE FOLDING ELEMENTS AND MAIN END FOLDING ELEMENTS SUBSTANTIALLY IN LINE WITH THE BORDERS OF THE MAIN PANEL OF THE BLANK; A PLUNGER MOVABLE INTO AND OUT OF THE MAIN DIE, SAID PLUNGER COMPRISING A BLANK ENGAGING BOTTOM PORTION CORRESPONDING TO THE BOTTOM PORTION OF THE BLANK; AND MEANS FOR MOVING SAID PREFOLDING MEMBER INTO AND OUT OF THE SPACE BETWEEN SAID GUSSET FOLDING ELEMENTS, AND FOR MOVING SAID PLUNGER INTO AND OUT OF SAID MAIN DIE IN TIMED SEQUENCE.

Claim 2

A DEVICE FOR SETTING UP GUSSET CORNERED FOLDING BOXES FROM FLAT BOX BLANKS, THE DEVICE COMPRISING, A PREFOLDING MEMBER WHOSE BLANK ENGAGING BOTTOM PORTION IS OF THE GENERAL SHAPE OF AN INVERTED TRUNCATED PYRAMID AND COMPRISES A CENTRAL FLAT BOTTOM PORTION CORRESPONDING TO THE BOTTOM PORTION OF THE BLANK TO BE FOLDED AND DEFINED BY AT LEAST TWO SPACED PARALLEL FOLDING RULES AND CORNER RULES ARRANGED IN V-SHAPE AT CORNERS OF THE BOTTOM PORTION, THE BOTTOM EDGES OF THE CORNER RULES BEING UPWARDLY SLANTED FROM THE APEX OF THE V IN A DIRECTION AWAY FROM THE SAID BOTTOM PORTION; A PREFOLDING DIE COMPRISING A PAIR OF UPRIGHT OUTER SIDE FOLDING ELEMENTS SPACED APART WIDER THAN THE MAIN SIDE FOLDING ELEMENTS OF THE MAIN DIE HEREINAFTER RECITED, AND A PAIR OF UPRIGHT OUTER END FOLDING ELEMENTS SPACED APART WIDER THAN THE MAIN END FOLDING ELEMENTS OF THE MAIN DIE HEREINAFTER RECITED; A GUSSET FOLDING ELEMENT TALLER THAN SAID OUTER SIDE FOLDING ELEMENTS AND SAID OUTER END FOLDING ELEMENTS, SAID GUSSET FOLDING ELEMENTS BEING STATIONARY WITH RESPECT TO SAID PREFOLDING DIE AND LOCATED TO ENGAGE THE GUSSET PORTIONS OF THE BLANK WITHIN THE AREAS OF SAID V''S BEFORE THE REMAINDER OF THE BLANK IS ENGAGED BY SAID OUTER SIDE FOLDING ELEMENTS AND SAID OUTER END FOLDING ELEMENTS; A MAIN FOLDING DIE COMPRISING MAIN SIDE FOLDING ELEMENTS AND MAIN END FOLDING ELEMENTS SUBSTANTIALLY IN LINE WITH THE BORDERS OF THE MAIN PANEL OF THE BLANK; A PLUNGER MOVABLE INTO AND OUT OF THE MAIN DIE, SAID PLUNGER COMPRISING A BLANK ENGAGING BOTTOM PORTION CORRESPONDING TO THE BOTTOM PORTION OF THE BLANK; AND MEANS FOR MOVING SAID PREFOLDING MEMBER INTO AND OUT OF THE SPACE BETWEEN SAID GUSSET FOLDING ELEMENTS, AND FOR MOVING SAID PLUNGER INTO AND OUT OF SAID MAIN DIE IN TIMED SEQUENCE.