Wounded and discharged during WWI, Fleischmann travelled in Europe and was greatly influenced by Expressionism and Franz Marc, and later by Cubism. He moved to France during WWII focusing on abstract painting but in 1944 his studio was completely destroyed. He worked as a painter and textile and graphic designer until in 1952 he moved to US. His style was inspired by Concrete art but he softened harsh geometries to create series of movements and L-shaped objects, such as in his Metamorphoses. He returned to Europe for few months and exhibited in Stuttgart his own unique geometric style.