The material in the socket drum that is larger than the socket follows a spiral track along the inner wall of the drum and slides backward to the end by itself using the thrust of the feed.
Material larger than the eye of the nest eye in the nest eye roller follows a helical trajectory along the inner wall of the barrel using the thrust of the feed to slide back to the end and discharge.
The material larger than the dimple in the dimple drum follows a spiral track along the inner wall of the cylinder, and then slides back to the end by the thrust of the feed.<br>