The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2009
Filed:
Mar. 26, 2004
Claudio Ferrari, Fiorano Modenese, IT;
Antonio Melandri, Rubiera, IT;
Saquib Javed, Bagno, IT;
Giorgio Galavotti, Concordia, IT;
Claudio Ferrari, Fiorano Modenese, IT;
Antonio Melandri, Rubiera, IT;
Saquib Javed, Bagno, IT;
Giorgio Galavotti, Concordia, IT;
Tetra Laval Holdings & Finance SA, Pully, CH;
Abstract
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.