Apparatus for making containers

Claim 1

APPARATUS FOR FORMING A SUBSTANTIALLY RECTANGULAR CONTAINER FROM A PAIR OF CROSSED BLANKS, SAID BLANKS HAVING CENTRAL END-FORMING PANELS IN SUPERPOSED RELATION AND SIDE-FORMING PANELS EXTENDING OUTWARDLY FROM SAID ENDFORMING PANELS, AND ONE OF SAID BLANKS HAVING LONGITUDINALLY EXTENDING LATERAL FLANGES ADAPTED TO BE FOLDED UPON AND BONDED TO THE OUTER FACES OF THE SIDE-FORMING PANELS OF SAID OTHER BLANK, COMPRISING: A PAIR OF ELONGATED COOPERABLE MALE AND FEMALE DIES AND MEANS FOR PRODUCING RELATIVE LONGITUDINAL MOVEMENT BETWEEN SAID DIES. SAID MALE DIE HAVING AN UPPER HORIZONTAL FACE SUBSTANTIALLY CONFORMING IN SIZE AND SHAPE TO THE CROSS-SECTIONAL AREA OF SAID CONTAINER, TWO PAIRS OF SUBSTANTIALLY VERTICAL SIDE WALLS, THE WALLS OF EACH PAIR BEING SUBSTANTIALLY PARALLEL TO EACH OTHER AND PERPENDICULAR TO THE OTHER PAIR, SAID SIDE WALLS EXTENDING DOWNWARDLY FROM SAID HORIZONTAL FACE A DISTANCE AT LEAST EQUAL TO THE HEIGHT OF SAID CONTAINER, A HEAD MOVABLE WITH RESPECT TO SAID MALE DIE AND COOPERABLE WITH SAID HORIZONTAL FACE FOR CLAMPING THE SUPERPOSED END-FORMING PANELS OF A PAIR OF CROSSED BLANKS BETWEEN THEM PREPARATORY TO FORMATION OF THE CONTAINER; AND SAID FEMALE DIE HAVING TWO PAIRS OF SUBSTANTIALLY VERTICAL INNER WALLS CORRESPONDING TO THE SIDE WALLS OF SAID MALE DIE, SAID INNER WALLS EXTENDING VERTICALLY FOR A DISTANCE AT LEAST EQUAL TO THE HEIGHT OF SAID CONTAINER FROM A LOWER HORIZONTAL MARGIN WHERE SAID HORIZONTAL FACE OF SAID MALE DIE FIRST ENGAGES SAID SUBSTANTIALLY VERTICAL INNER WALLS, AND SAID TWO PAIRS OF INNER WALLS OF SAID FEMALE DIE TERMINATING AT THEIR LOWER ENDS IN FOUR SIDE WALLS WHICH ARE FLARED OUTWARDLY AND DOWNWARDLY FROM SAID MARGIN TO ENGAGE THE FLANGES OF SAID ONE BLANK AND THEREBY INITIATE THE TURNING OF SAID FLANGES OVER THE OUTER FACES OF THE SIDE-FORMING PANELS OF SAID OTHER BLANK AS SAID DIES MOVE INTO NESTING RELATIONSHIP COMPLETING SAID TURNING AT SAID MARGIN.