US Patent 11970381 Methods of capping metallic bottles

Methods of sealing a metallic container are provided. More specifically, the present invention relates to methods that reduce the amount of force applied to a metallic bottle to seal the metallic bottle with a ROPP closure. The methods include use of a capping apparatus that may include more thread rollers than known capping apparatus. Optionally, the thread rollers may use more forming passes to form threads on the ROPP closure. The capping apparatus may also rotate one or more of the ROPP closure and the metallic container in a closing direction before the metallic container is discharged. In one embodiment, the thread rollers form the closure threads before or after a pilfer roller applies a sideload to the ROPP closure.