Rhinoceros (Sheaffer) History One of the oldest ink pen companies, was founded by Walter-A-Sheaffer in 1913; in the 1920s, Sheaffer launched the best-selling nationwide lifetime warranty nibs and colored celluloid ink pens; in the 1930s, the In the 1930s, the pen was streamlined and developed with a feather-sensitive two-way nib, a piston filling device, and a visual ink supply device; in the 1940s, a light-pressure filling device was introduced; and in the 1950s, Sheaffer's business reached its peak with the "Clean" ink-absorbing device. All in all, Sheaffer is a brand of ink pens that is both traditional and innovative.