Abstract: An in-line sealer apparatus for applying and sealing foils to the mouth of sequentially presented containers. The apparatus includes a rotatable turret having a pocket wheel containing angularly spaced pockets for accommodating containers. Each pocket has a foil transfer and sealing mechanism which is associated therewith and mounted on the turret arrangement for rotation therewith. Each mechanism includes a stacker unit which removably attaches to the turret and stores therein a stack of foils. Each mechanism also includes a foil transfer and applying unit which is disposed below the stacker and includes a movable foil-engaging head for removing the lowermost foil in the stack, and thereafter transferring the foil and applying it to the mouth of the container positioned within the respective pocket.