Abstract: A method and capping apparatus is provided for securely seating a closure with curvilinear top surface onto a container in a manner that avoids damage from excessive force applied to the closure. The apparatus has a cap locking unit with a circulating compression belt that contacts a top surface of the closure/container as the combination is being transported from underneath by a conveyor. A dancer contacts an inner surface of the compression belt. Pressure is applied from the dancer through leading and trailing leg components that converge from a common pivot. Ends of the leading and trailing legs are spaced from one another less than the length of the closure. Force is applied to the closure by simultaneous pressure from both legs on different first and second areas of the closure top surface.

Abstract: A method and capping apparatus is provided for securely seating a closure with curvilinear top surface onto a container in a manner that avoids damage from excessive force applied to the closure. The apparatus has a cap locking unit with a circulating compression belt that contacts a top surface of the closure/container as the combination is being transported from underneath by a conveyor. A dancer contacts an inner surface of the compression belt. Pressure is applied from the dancer through leading and trailing leg components that converge from a common pivot. Ends of the leading and trailing legs are spaced from one another less than the length of the closure. Force is applied to the closure by simultaneous pressure from both legs on different first and second areas of the closure top surface.