Basement in thick AISI 304 stainless steel plate with height adjustable feet.Conveyor belt with stainless steel table-top chain mounted on an antifriction section with adjustable side guides.Side belts for containers dragging and steadiness.Caps releasing and pre-screwing unit.Steam sprigging unit for steam injection in the space between the cap and the container thread in order to soften the gasket and take the air away from the container head space, thus allowing the vacuum formation inside the container after closure.he caps releasing unit and screwing unit are adjustable independently (as regards also to the dragging belts )