Title:
パッケージ材用の加熱シール装置
Document Type and Number:
Japanese Patent JP4510460
Kind Code:
B2
Abstract:
Device for welding a moving packaging material ( 1 ) including a layer that can be heated by electromagnetic induction and a thermoplastic layer incorporating a welding zone ( 2 ) which lies in the direction of movement of the packaging material; the welding device includes an alternating current generator, a coil ( 3, 5, 6 ) for transforming the alternating current into a magnetic field, a ferromagnetic element ( 7, 8, 10-13 ) for channeling the magnetic field lines in a specific direction, the magnetic field being oriented so s to cross the packaging material ( 1 ) in order to induce heating of the layer that can be heated by electromagnetic induction; the welding device being characterized in that it includes a set of ferromagnetic elements ( 7, 8, 10-13, 19-21 ) which are arranged so that the magnetic field lines cross the packaging material ( 1 ) in at least two distinct regions ( 14, 16-18 ) located along the welding zone ( 2 ).
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Inventors:
Thomas, Jack
Application Number:
JP2003554377A
Publication Date:
July 21, 2010
Filing Date:
December 16, 2002
Export Citation:
Assignee:
Eisa Pack Holding Society Anonym
International Classes:
B29C65/04; B23K13/02; B29C65/02; B29C53/50; B29L9/00
Domestic Patent References:
| JP55003215B1 | ||||
| JP61273274A | ||||
| JP52020187A | ||||
| JP55036250B1 |
Attorney, Agent or Firm:
Atsushi Aoki
Jun Tsuruta
Tetsuro Shimada
Masaya Nishiyama
Jun Tsuruta
Tetsuro Shimada
Masaya Nishiyama