 Quimby accepted each Academy Award for Tom and Jerry without inviting Barbera and Hanna onstage . The cartoons were also released with Quimby listed as the sole producer , following the same practice for which he had condemned Ising . Quimby once delayed a promised raise to Barbera by six months . When Quimby retired in late 1955 , Hanna and Barbera were placed in charge of MGM 's animation division . As MGM began to lose more revenue on animated cartoons due to television , the studio soon realized that re @-@ releasing old cartoons was far more profitable than producing new ones . In 1957 , MGM ordered Barbera and Hanna 's business manager to close the cartoon division and lay off everyone by a phone call . Barbera and Hanna found the no @-@ notice closing puzzling because Tom and Jerry had been so successful . 
