Parker Jointless

The Parker Jointless "Lucky Curve" is a range of fountain pens released by the Parker Pen Company in late 1897. The pen used the Lucky Curve ink supply system, designed to draw ink even when the pen was not in use, which was invented and patented by George Safford Parker in 1894. The pen was named "Jointless" because of its one-piece ink barrel, designed to prevent leakage, an innovation at the time – though the design made the refilling process messy.[1] The pen was Parker's first to be advertised outside the United States. The American government purchased the pens in large quantities and a Parker Jointless was one of the pens used to sign the Spanish–American Treaty of Paris in 1898.[2]

An 1898 advertisement for the pen

Jointless and spring lock

Parker anti-break cap US653,818 patent

Parker Pen at 17-19 South Main Street, Janesville. The Home of the Jointless fountain pen.