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150/365 – Pen

Lewis Waterman patented the first practical fountain pen in 1884. Writing instruments designed to carry their own supply of ink had existed in principle for over one hundred years before Waterman’s patent.

For example, the oldest known fountain pen that has survived today was designed by a Frenchmen named M. Bion and dated 1702. Peregrin Williamson, a Baltimore shoemaker, received the first American patent for a pen in 1809.

John Scheffer received a British patent in 1819 for his half quill, half metal pen that he attempted to mass manufacture. John Jacob Parker patented the first self-filling fountain pen in 1831. However, early fountain pen models were plagued by ink spills and other failures that left them impractical and hard to sell.

The fountain pen’s design came after a thousand years of using quill-pens. Early inventors observed the apparent natural ink reserve found in the hollow channel of a bird’s feather and tried to produce a similar effect, with a man-made pen that would hold more ink and not require constant dipping into the ink well.

Filling a long thin reservoir made of hard rubber with ink and sticking a metal ‘nib’ at the bottom was not enough to produce a smooth writing instrument.

Lewis Waterman, an insurance salesman, was inspired to improve the early fountain pen designs after destroying a valuable sales contract with leaky-pen ink. Lewis Waterman’s idea was to add an air hole in the nib and three grooves inside the feed mechanism.

A mechanism is composed of three main parts. The nib, which has the contact with the paper. The feed or black part under the nib controls the ink flow from the reservoir to the nib. The round barrel that holds the nib and feed on the writing end protects the ink reservoir internally.

All pens contain an internal reservoir for ink. The different ways that reservoirs filled proved to be one of the most competitive areas in the pen industry. The earliest 19th century pens used an eyedropper; by 1915, most pens had switched to having a self-filling soft and flexible rubber sac as an ink reservoir.

To refill these pens, the reservoirs were squeezed flat by an internal plate, then the pen’s nib was inserted into a bottle of ink and the pressure on the internal plate was released so that the ink sac would fill up drawing in a fresh supply of ink.

Source: http://inventors.about.com/library/weekly/aa100897.htm

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