| 摘要 |
The invention solves in a new manner the known problems of making packages in the form of a continuous tube completely and reliably tight though a method, which is mainly distinguish by the tube being pressed together at the constricting positions into a string and that the string along plural lines are subjected to high and preferably pulsating pressure of such a magnitude that the material becomes adhering. The lines may be traversal with respect to the tube ot crossing each other so as to form a checked pattern. The pulsation in pressure is suitably obtained through ultrasound. The invention concerns a device as well as a sealing method. |
