An assembly is configured for use in a system for forming filament windings on a vessel having a circumference and a length. The assembly includes an endless belt and first and second rollers. The endless belt is configured to wrap partially around the circumference of the vessel to contact and impart pressure on a filament winding disposed on an outside surface of the vessel. The endless belt moves around the first and second rollers. A space is disposed between the first and second rollers to allow a filament wind eye of the system to move in a reciprocal motion along the length of the vessel. A method of using a machine for forming filament windings on a vessel having a circumference and a length is also described.