Abstract: A rotary sealing apparatus for a blister packaging machine is disclosed. The rotary sealing apparatus includes a guide plate adapted to support a movement of a base foil having a plurality of blister pockets. The rotary sealing apparatus includes a counter sealing roller adapted to rotate to advance the base foil in a direction away from the guide plate and a sealing roller adapted to feed a seal foil between the counter sealing roller and the sealing roller. The counter sealing roller includes a plurality of cavities adapted to accommodate the plurality of blister pockets. The rotary sealing apparatus includes a cavity alignment unit disposed on the guide plate and adapted to align the plurality of blister pockets with the plurality of cavities. The cavity alignment unit is adapted to clamp the base foil on the guide plate to stretch the base foil to align the plurality of blister pockets with the plurality of cavities.