Patent ID: 8028503

Claim:
A method for ultrasonically sealing food product packaging, said method including: sealing food product packaging by passing said food product packaging between an operably positioned rotating anvil and an ultrasonically activated rotating horn, wherein said rotating anvil has a plurality of anvil sealing surfaces distributed radially around said rotating anvil, and wherein said rotating horn has a plurality of horn sealing surfaces distributed radially around said rotating horn, wherein said food product packaging is passed between one of said plurality of horn sealing surfaces and one of said plurality of anvil sealing surfaces, wherein said rotating anvil rotates around a first axis of rotation and said rotating horn rotates around a second axis of rotation different from said first axis of rotation wherein a plurality of said plurality of anvil sealing surfaces are positioned at a fixed distance from said first axis of rotation, wherein said ultrasonically activated rotary horn rotates completely around said access of rotation so that at a first time a first of said plurality of horn sealing surfaces is operably positioned with respect to said rotating anvil wheel and so that at a second time a second of said plurality of horn sealing surfaces is operably positioned with respect to said rotating anvil wheel, wherein an ultrasonic converter is positioned axially to said ultrasonically activated rotating horn, wherein said ultrasonic converter causes said ultrasonically activated rotary horn to vibrate transversely to the radial direction of said rotating horn.