Invention patent problem

There can only be one type of subject for each claim, either product or method. Otherwise, the claim is unclear and does not conform to the provisions of Article 26.4 of the Patent Law.

Therefore, your technical proposal should be changed to at least two independent claims:

1. A writing method, which is characterized in that the ink is brought out by the rotation of the ball to realize the writing function. ...

2. A ballpoint pen made by the method of claim 1, characterized in that ...

However, logically speaking, there will be ambiguity, and it is best to change it to:

1 ballpoint pen, characterized in that ...

2. The writing method using a ballpoint pen according to claim 1, wherein ...