SR4- Semi-automatic carton sealer for random size cases. It is easy to be used and adjusts itself automatically to every boxes dimension whose sizes are included in the range of the machine possibilities. It can be started by any operator in few minutes, too. It allows a perfect closing of the box by adhesive tape thanks to the double top and bottom driving system and the super reliable taping unit K11. The carton sealer has been designed and built according to the CE 392 Machine. Directives and subsequent revisions.