PROCESS AND APPARATUS FOR CLOSING ONE END OF A TUBULAR BAR

摘要

PROCESS AND APPARATUS FOR CLOSING ONE END OF A TUBULAR BAR A process is described in which a tubular bar which is substantially but not entirely filled with flowable solids , is closed at one end. To close the tubular bar at its end, a thread is introduced into the tubular bar and 19 caused to form a ball of thread therein. The thread is preferably introduced into the tubular bar by being blown through a hollow needle