An apparatus for sealing containers having upstanding longitudinal and transverse flap portions, the apparatus having a conveyor for the motivation of containers therealong in spaced intervals; a folding mechansim, having tucking fingers and folding arms, mounted in spaced relation to the conveyor and synchronous therewith, the fingers being adapted to tuck the transverse flap portions and the arms to fold the longitudinal flap portions to overlay their respective containers during passage along the conveyor; an adhesive applicator mounted adjacent to the folding mechanism for the application of adhesive to selected areas of the flap portions; and pressure rollers mounted adjacent to the applicator to fold the selected areas of the flap portions into contact with the container and to maintain such contact during passage of the container along the conveyor until the adhesive sets.
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