Abstract: This relates to a capper for applying closures to containers. In a packer's plant there is frequently a necessity to modify a capper so as to apply closures to containers of different diameters and different heights with the closures also being different in diameters, thicknesses, etc. In the past, the cappers have been provided with change parts and are in a certain degree adjustable so that a capper can be modified to accept a range of container diameters and heights and closure sizes. However, shut-down time has continued to be an important factor. Further, final adjustment of the capper after modification has been a problem. There has been provided a universal capper which is provided with height and width adjustments for both containers and closures and all of these adjustments may be made while the machine is operating so as to obtain minute adjustments. The changeover time is no longer a factor with the universal capper.