Complex sentence: While working for Walter Maibaum as a printer at Editions Press in San Francisco in the mid to late 1970s, Farnsworth found that there was a growing demand for handmade paper from artists.
Split into simpler sentences: While working for Walter Maibaum as a printer at Editions Press in San Francisco in the mid to late 1970s. Farnsworth soon found that there was a growing demand for handmade paper from artists.