Devices for squaring flat collapsed tubular folding box blanks

Claim 1

IN A FOLDING BOX MACHINE COMPRISING A MAGAZINE FOR STORING FLAT COLLAPSED TUBULAR BLANKS AND A COMPARTMENTED ENDLESS CONVEYOR INTO WHOSE COMPARTMENTS THE BLANKS ARE PLACED AND IN WHICH THE BLANKS ARE THEN SQUARED, A BLANK PRESQUARING DEVICE COMPRISING: A BLANK CARRIER INCLUDING SUCTION CUP MEANS FOR GRASPING A BLANK; MEANS FOR MOVING SAID CARRIER ON AN ARC FROM A FIRST POSITION AT THE MAGAZINE AT WHICH THE MOUTH OF SAID CUP MEANS IS IN A FIRST UPRIGHT PLANE TO A SECOND POSITION AT A BLANK DEPOSIT STATION ADJACENT SAID CONVEYOR AT WHICH THE MOUTH OF SAID CUP MEANS IS IN A SECOND SUBSTANTIALLY HORIZONTAL PLANE, SAID TWO PLANES BEING DISPOSED SUBSTANTIALLY AT A RIGHT ANGLE TO EACH OTHER; AND AN OBSTACLE IN THE PATH OF THE BLANK CARRIED BY SAID CARRIER, SAID OBSTACLE BEING MOUNTED ADJACENT SAID FIRST PLANE AND AT A DISTANCE FROM THE APEX OF SAID RIGHT ANGLE LESS THAN THE DISTANCE OF SAID CUP FROM THE APEX TO FLEX THE OBSTACLE ENGAGED BLANK PORTION RELATIVELY TO THE CUP ENGAGED PORTION, THE ARRANGEMENT BEING SUCH THAT A BLANK FOLD LINE DISPOSED GENERALLY TRANSVERSE TO THE DIRECTION OF BLANK MOVEMENT LIES BETWEEN THE OBSTACLE ENGAGED BLANK PORTION AND THE CUP ENGAGED PORTION.