Device for continuous hot-sealing of thermoplastic films

Details Device for continuous hot-sealing of thermoplastic films Device for continuous hot-sealing of thermoplastic films

B - Operations, Transporting

29

C

154/30.04

B29C 65/18 (2006.01) B29C 65/02 (2006.01) B29C 65/08 (2006.01)

Patent

CA 1298538

ABSTRACT OF THE DISCLOSURE A device is disclosed for continuous hot-sealing of thermoplastic films. This device comprises a sealing head provided with two rip cord electric resistances that are heated by causing an electric current to flow therethrough. The resistances are made of a material the electric resistance of which is proportional to the temperature. The sealing head is caused to rapidly vibrate against a counter-plate so as to cause the thermoplastic film to be sealed to be rapidly pounded as it glides between the head and the counter plate. The sealing of the thermoplastic film is brought about by the synergistic action of the heat of the resistances and the pressure due to the pounding.

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