Foodmaker Inc., the San Diego-based operator and franchiser of the fast-food chain of Jack in the Box restaurants, said it will change its name to Jack in the Box Inc., as of Oct. 4. Its stock symbol on the New York Stock Exchange will change to JBX from FM. The changes will coincide with a planned expansion into the Southeast U.S. The company has rebounded after weathering an outbreak of deadly illnesses caused by E. coli contamination six years ago. Its shares have risen 78% in the last year. Shares rose 31 cents to close at $29.31 on the New York Stock Exchange. The company runs 1,500 Jack in the Box restaurants and employs 37,000.