The following is a brief history of pen development:
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 and write.
Press it again later, or the ink won't come out. Of course it's inconvenient to write like this.
1829, the British james bailey successfully developed the nib. After special treatment, it is smooth and elastic, and it is quite smooth to write, which is deeply loved by people. But this pen must be dipped in ink to write, which is very troublesome.
By 1884, an employee of an American insurance company named Waltman 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.