Pen is now widespread use of the writing tool, it is the invention in the early 19th century. 1809, the United Kingdom issued the first batch of water on the T patent certificate, which marked the official birth of a pen. Early in the water in the pen, ink can not flow freely. Those who write the Pistons pressure, ink flow began, and after a while to write in to pressure, otherwise the ink on to Liu Buchu. Wrote the words to this effect is not easy of course. To 1884, a U.S. insurance company named Waterman employees, has created a supply of ink by capillary way, a better solution to these problems. This can be unloaded Biduan pen, ink with a small dropper injection. |
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