Abstract: Apparatus and a method for removing foreign and undesirable material from composite cans during the manufacturing operation includes a first conveyor having spindles thereon for indexing the cans on the first conveyor in a space parallel relation with an open end thereof faced in a direction substantially transverse to the direction of conveyance. A second conveyor is positioned alongside the first conveyor, and is positively controlled with, and driven with the first conveyor in the same direction at a uniform rate. A plurality of plungers are provided parallel to the cans and carried by the second conveyor, and a cam arrangement drives the plungers toward, through and away from the cans in order to pass the end of each plunger through a corresponding can to remove any foreign or undesirable materials therefrom.