At 8:45AM, 4 MTM's and 1 manager were trapped in an elevator when it stopped between floors. Employees phoned for help. Electricians tried but could not get the elevator to run so MEI Elevator was called out. MEI worked on this elevator the day before. MEI and plant personnel got the elevator to the floor and got the employees out by 10:17AM. MSHA was notified of the incident.