CARTON TOP SEALER APPARATUS AND METHOD

摘要

A method for forming a top seal on a carton being conveyed along a processing path on a form, fill and seal packaging machine using a top sealer (22) including opposing sealing jaws (30,30') is provided. The carton includes top fin panels configured for sealing to one another to form a top seal. The method includes actuating a first control valve (72) to provide communication between a first pressurized fluid source (64) and a first port (66) of an actuator (38) for moving the actuator toward a first position. The actuator is operatively connected to the sealing jaws (30,30') to move the sealing jaws in a clamping direction while moving toward the first position. A second control valve (74) is actuated to inhibit fluid escape from the actuator through a second port (70) of the actuator to inhibit movement of the sealing jaws in the clamping direction.