On the factory floor of the newly operational Taste of Maine Potato Chip plant in Limestone, the kettle chips are humming along the line. “It was something I always wanted to do,” company owner Bruce Sargent said in an interview at the factory on Monday. Workers on the factory floor at the Taste of Maine Potato Chip plant. New industrial revitalization efforts, including the construction of the Taste of Maine plant, have injected some life into the long-neglected space. “We’re the first new property to be built here, and the hope is that will attract more people to come to northern Maine,” Sargent said.