Patent ID: 8502121

Claim:
Radiofrequency welding apparatus comprising: a first welding platen; a second welding platen; a single source providing radiofrequency power to the first welding platen; a first die member mounted on said first welding platen; a second die member mounted on said first welding platen adjacent the first die member, the first and second die members being electrically isolated; and a radiofrequency power distributing device for capacitively splitting the radiofrequency power provided to said first welding platen into first and second radiofrequency power components of different magnitudes and for simultaneously delivering said RF power components to said first and second die members, respectively, the radiofrequency power distributing device comprising separate first and second electrically isolated conductive plates of different sizes, said first conductive plate being positioned at an elevation between the first welding platen and the first die member and said second conductive plate being positioned at an elevation between the first welding platen and the second die member, the first conductive plate being electrically connected to the first die member and electrically isolated from the second die member, and the second conductive plate being electrically connected to the second die member and electrically isolated from the first die member, a dielectric layer between the first welding platen and the first and second conductive plates and an electrical insulating layer extending between the first conductive plate and first die member and between the second conductive plate and the second die member.