Stacking system for paperboard blanks

Abstract

Abstract APPARATUS FOR STACKING ALTERNATE STACKS OF CORRUGATED PAPERBOARD BLANKS DISCHARGED FROM A BLANK-FORMING MACHINE FACEUP AND FACEDOWN TO REDUCE WARPING COMPRISING AN INTERMITTENLY ROTATING TRANSVERSE STORAGE CONVEYOR MEANS FOR LRECEIVING AND TEMPORARILY STORING STACKS OF BLANKS IN FACEUP POSITION FROM AN IN-LINE CONVEYOR ADJACENT THE BLANK-FORMING MACHINE, AN INVERTER FOR SEQUENTIALLY RECEIVING STACKS FROM THE STORAGE CONVEYOR AND INVERTING ALTERNATE STACKS TO A FACEDOWN POSITION ON A RISING CONVEYOR COMPRISING A GUIDE FOR DIRECTING THE STACKS INTO A SUBSTANTIALLY VERTICAL POSITION WITH THE STACK RESTING ON ITS LEADING EDGE ON THE RISING CONVEYOR WHERE A PIVOTING FINGER CARRIED BY THE RISING CONVEYOR ENGAGES THE BOTTOM EDGE OF A FIRST STACK ON THE CONVEYOR TO ADVANCE IT ALONG THE CONVEYOR THEREBY POSITIONING THE FIRST STACK FACEUP, AN INVERTING LEVER ADJACENT THE UNDERSIDE OF A SUBSEQUENT STACK INTERMITTENLY OPERABLE TO ENGAGE THE UNDERSIDE SURFACE OF THIS SECOND STACK TO PIVOT IT ABOUT ITS BOTTOM EDGER SO THAT IT DESCENDS ONTO THE RISING CONVEYOR WITH ITS UNDERSIDE UP, FIRST AND SECOND ADVANCING FINGERS FOR SEQUENTIAL ENGAGEMENT WITH THE TRAILING EDGES OF THE FIRST AND SECOND STACKS TO ADVANCE THEM ALONG THE RISING CONVEYOR, A STACKER FOR RECEIVING STACKS OF BLANKS FROM THE RISING CONVEYOR AND STACKING THEM ONE UNDER THE OTHER TO FORM A PILE OF BLANKS COMPRISING A LIFTING CONVEYOR INCLUDING A STOP FOR POSITIONING EACH OF THE STACKS, MEANS FOR RAISING THE LIFTING CONVEYOR, WITH THE STACK THEREON, A DISTANCE SLIGHTLY GREATER THAN THE HEIGHT OF THE STACKS, A SUPPORT FOR ENGAGING THE BOTTOM FACE OF THE LIFTED STACK TO MAINTAIN THE STACK IN ITS LIFTED POSITION, MEANS FOR LOWERING THE LIFTING CONVEYOR TO RECEIVE ANOTHER STACK FOR REPEATING THE FOREGOING LIFTING OPERATION, AND MEANS ROTATING THE LIFTING CONVEYOR IN ITS UPPERMOST POSITION WHEN THE PILE OF BLANKS REACHES A SELECTED HEIGHT TO DISCHARGE THE PILE ON A SKID OR OTHER CONVEYOR FOR FURTHER HANDLING.

Inventors

• 👤 Mircea Calistrat

Bibliographic Details