发明名称 |
INDUCTION SEALING DEVICE AND CORRESPONDING METHOD FOR PRODUCING PACKAGES OF POURABLE FOOD PRODUCT |
摘要 |
An induction sealing device which may be used for producing packages of pourable food products by transversely sealing a tube of sheet packaging material having at least one layer of induction heatable material covered with plastic material. The sealing device has: a generator for generating an alternating power signal; an inductor receiving the alternating power signal to induce a parasitic electric current in the layer and locally melt the plastic material to form a transverse seal; and a matching circuit for achieving optimum power transfer between the generator and the inductor. The matching circuit includes an inductive-capacitive circuit, in which the capacitance of a variable capacitance capacitive element is adjustable so that the current-voltage phase angle is close to zero. |
申请公布号 |
EP1620249(B1) |
申请公布日期 |
2006.08.23 |
申请号 |
EP20040723614 |
申请日期 |
2004.03.26 |
申请人 |
TETRA LAVAL HOLDINGS & FINANCE SA |
发明人 |
FERRARI, CLAUDIO;MELANDRI, ANTONIO;JAVED, SAQUIB;GALAVOTTI, GIORGIO |
分类号 |
B29C65/02;B29C65/00;B65B51/22;B65B57/00;H03H7/40;H03J5/24 |
主分类号 |
B29C65/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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