In 1880, many salespersons of an insurance company in the United States were drawing customers to discuss business. A salesman named Fateman exhausted his words before defeating the competition of several colleagues and concluding a big business. When signing the contract, Waterman handed the customer a fine quill and a bottle of ink, and asked the customer to sign. Unexpectedly, the customer had just dipped the ink to sign. Due to excessive force, a lot of quill leaked from the quill. Ink stained a contract.
"Please wait a moment," Waterman said to the customer, and then hurried back to get a new contract.
At this moment, a competitor standing beside Waterman immediately took advantage of the situation and rushed to sign a contract with the customer before Waterman arrived, thus stealing the big business.
The excitement of this incident to Watman is too great. "I must design an ideal pen that can control the launch myself!" He was determined.
According to the principle of liquid transported by the capillary of plants, Waterman first controlled the ink from the pen pouch with a very thin channel to make the automatically flowing ink trickle, and then added a small pen tongue to the pen tip. The role of the pen tongue is to store excess ink for the pen tip. Once a large amount of ink flows out of the pen pocket due to air pressure and vibration, the vertical and horizontal grooves on the pen's tongue play a role of "stop flood and store water." Once the pen pocket is empty, the tongue will stop it Ink continues to be supplied to the pen tip.
After unremitting efforts, Waterman has finally developed a new fountain pen. Because the ink in the fountain pen could be controlled by himself, it was called a "tap pen".