Patent ID: 7220950
Filing Date: 2007-05-22
Classification: H05B

Abstract:
1. An apparatus for performing a process of embossing, sealing, welding or fusing RF sealable material, the apparatus comprising: a power source including a solid state generator for providing a predetermined power load at a predetermined frequency; power components operating below a maximum predetermined power load in electronic communication with the generator for transferring power from the generator towards the sealable material; welding components for receiving the transferred power from the power components and transferring the power to the RF sealable material whereby the material is embossed, sealed, welded or fused; an automatic impedance tuning device in electronic communication between the power components and the welding components, the tuning device including electronically controlled capacitors; and the automatic tuning device electronically monitoring the electrical state of the apparatus and continuously controlling the capacitors in the tuning device for modifying apparatus impedance throughout the process so that: (1) delivery of said predetermined power remains substantially unchanged and (2) said power load in said power components remains below said maximum predetermined power load.