Conagra Brands, the US packaged foods firm, has announced that it has reached a deal to acquire Sandwich Bros of Wiconsin, a manufacturer of frozen convenience breakfast foods and flatbread sandwiches. Terms of the deal were not disclosed. Sandwich Bros.of Wisconsin’s offers “snack meals” such as chicken melts and cheeseburgers, as well as flatbread pocket sandwiches filled with cheese, egg, turkey, beef and sausage. The family-owned firm achieved approximately $60 million in …