NEW YORK.- Artist Floriano Vecchi, 84, died. He was a silk-screen printer and also an art publisher. He was born near Bologna, Italy. In 1952 he went to live to New York and later opened Tiber Press, which he operated until 1977. Among the works that Tiber Press printed were those of Helen Frankenthaler, Alfred Leslie, Georgia O'Keeffe, Frank O'Hara, Paul Cadmus, and Ben Shahn. Floriano Vecchi had some of his own works exhibited in New York. In 1962 Andy Warhol went to Tiber Press to have a screen made of a dollar bill drawn on paper. This was his first U.S. currency compositions.