Machine for covering a pallet with shrinkable plastic film

Abstract

Abstract A LOADED PALLET IS CARRIED ON A CONVEYOR BELT UNDER A SUPPORT FRAME. THE SUPPORT FRAME HAS MOTOR DRIVEN ROLLERS TO WHICH ARE FED DOUBLE LAYER PLASTIC BAGS OPEN AT ONE END. THE ROLLERS ENGAGE THE END OF THE BAG AND DRAW IT DOWN UNTIL IT IS ENGAGED BY SUCTION HEADS AND MECHANICAL CLAMPS ON OPPOSITE SIDES OF THE BAG. THE SUCTION HEADS MOVE DOWN AND PULL OUT THE SIDES OF THE BAG TO ENCLOSE THE LOADED PALLET. AS THE OPEN BAG IS MOVING DOWNWARDLY, A SENSOR MOVING WITH THE SUCTION HEADS MEASURES THE HEIGHT OF THE INCOMING OR NEXT PALLET. WHEN THE SUCTION HEADS REACH THE BOTTOM OF THEIR TRAVEL, THEY WILL HAVE MEASURED THE HEIGHT OF THE INCOMING PALLET. AS THE SENSOR MOVES DOWN, A DOUBLE LAYER PLASTIC TUBE OR CENTERFOLD IS BEING FED FORWARD FROM A SUPPLY ROLL. WHEN THE SUCTION REACHES THE BOTTOM POSITION, THE TUBE IS CUT AND SEALED TO FORM A NEW BAG. THE NEW BAG IS CARRIED BY SPACED TENSIONED BELTS TO A POSITION ABOVE THE MOTOR DRIVEN ROLLERS SO THAT THE NEXT PALLET CAN BE COVERED.

Inventors

• 👤 J Burn

Bibliographic Details