Eraser pencil actually consists of three parts, 1 part is a pencil, the second part is an eraser, and the third part is a small connecting sleeve that connects the eraser and pencil together. It can be seen that the pencil of 1 and the eraser of the second part of the pencil are respectively disclosed by the prior art, namely pencils and erasers.
But the third part of the small connecting sleeve has never appeared before, or to be precise, this small connecting sleeve has never appeared on the pencil. It can be seen that under the condition that both the eraser and the pencil exist in the prior art, the innovation of the eraser pencil actually provides a connection mode for fixedly connecting the eraser and the pencil, which has never appeared before.
The origin of rubber-tipped pencils
There is a poor painter named Hyman in America. Although he worked hard, he never became famous because of improper painting methods and lack of guidance from famous teachers. But he invented a pencil with a rubber head.
Hyman often draws sketches with small pencils and erasers, which is very troublesome to wipe. In order to reduce the trouble, he cut rubber strip into small pieces and fixed it on the top of the pencil with wire, which was much more convenient to use, and Hyman became a millionaire.