Ouyang Sheng, inventor of disposable pen.

Pen is a widely used writing tool, which was invented at the beginning of19th century. 1809, Britain issued the first batch of patent certificates about water storage pens, which marked the official birth of pens.

In the early water storage pens, ink could not flow freely. When the writer presses the piston, the ink begins to flow. After writing for a while, he has to press it again, otherwise the ink will not flow out. Of course it's inconvenient to write like this.

By 1884, wortmann, an employee of an American insurance company, invented a capillary ink supply method, which solved the above problems well. The end of this pen can be disassembled and ink can be injected with a small dropper.

The earliest pen that can absorb ink by itself appeared at the beginning of the 20th century, using a piston to absorb ink. When using a bladder in a pen, insert an iron sheet into the gap to squeeze the bladder to absorb ink. At 1952, there appeared a snooker pen with a tube inserted in the ink to absorb water. The commonly used capillary pen was not invented until 1956.