The history of the invention of the pen:
1884 there was an American named wortmann, once his ink pen leaked and accidentally stained a contract. But when he drafted another contract, his competitors had already snatched the business, and he lost an important profit opportunity. In order to prevent this from happening again, wolman invented the modern ink pen according to the principle of capillary transport of liquid in plants. This ink pen is equipped with a new ink supply device. The end of the pen is detachable, and ink is injected with a small dropper, so it is also called fountain pen, commonly known as pen. And all this was carefully made by him with knives, saws and files as tools and a dining table as a lathe. Until the beginning of19th century, a patent of pen with stable and accelerated flow was invented in the production process. Only three key inventions have made the pen a widely popular writing tool. These inventions are: gold nib made of iridium, hard rubber and free-flowing ink.