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:
Oct. 16, 2012
Filed:
Aug. 13, 2008
Andrea Donati, Castelnuovo Rangone, IT;
Nikolay Madzharov, Drianovo, BG;
Antonio Melandri, Rubiera, IT;
Fabrizio Sighinolfi, Nonantola, IT;
Andrea Donati, Castelnuovo Rangone, IT;
Nikolay Madzharov, Drianovo, BG;
Antonio Melandri, Rubiera, IT;
Fabrizio Sighinolfi, Nonantola, IT;
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
An induction sealing device for producing packaged pourable food products from heat-seal sheet packaging material. The sealing device has a signal source, an inductor, and an impedance matching circuit connected between the signal source and the inductor. The impedance matching circuit has: two input terminals; a first and second line connected to the input terminals; a variable-capacitance stage having capacitive modules each made up of a capacitive element and a controlled switch; and a control stage to control the controlled switches. Each controlled switch includes: input terminals receiving a respective control signal from the control stage, with one input terminal of each controlled switch connected to the second line; a single two-way controlled switching element having a control terminal connected to the other input terminal of the controlled switch; a first current-conducting terminal connected to the first line, and a second current-conducting terminal connected to the second line.