The number of Federal Reserve banks pushing the central bank to raise the rate it charges commercial banks for emergency loans rose to eight in September from five in July, minutes from the Fed’s discount rate meeting showed. Ahead of the Fed’s September 16-17 policy-setting meeting, directors of the St. Louis, Atlanta and San Francisco Fed banks joined Cleveland, Dallas, Philadelphia, Kansas City and Richmond in asking the Fed’s board to increase the discount rate to 1 percent from 0.75 percent, according to the minutes, which were released on Tuesday.