Swedish-American animator, noted for his loose, rubbery animation. His output was prolific and he turned out numerous iconic cartoons for Ub Iwerks, MGM (where he helped create Tom & Jerry) and Hannah-Barbera (assisting in the development of characters for "The Flintstones", "The Jetsons", and "Yogi Bear"). He was a recipient in 1986 of the prestigious 1986 Winsor McCay Award for lifetime achievement in animation.