Taco Bell is launching a line of tortilla chips, which will be sold at grocery and convenience stores starting in May. The new chips are yet another example of how fast-food makers have tried to make inroads outside their eateries, extending their brand into new sales realms. Taco Bell already has had a line of packaged products through a deal with Kraft, including meal kits, beans, crunchy taco shells and bottled hot sauces.