A novel method and apparatus for implementing an overlay adaptive frequency-hopping kernel in a wireless communication system is described. The rod is horizontally displaced along a transport axis by a feed station, located upstream, and is brought through a bending shank borne by the main frame. The aperture of the resilient covering can be somewhat smaller than the underlying cannula port, forming a resilient margin that overhangs and surrounds the port. The method can be used in single exposure or double exposure mode.