Title:
BALLPOINT PEN REFILL GROUP ARRANGED ON THE SAME TYPE OF BARREL
Document Type and Number:
Japanese Patent JP2021154525
Kind Code:
A
Abstract:
To provide a ballpoint pen refill group which has an effect of being able to intuitively judge the ball diameter required by oneself and pick it up instantly even when the ball diameters are different in the ballpoint pen refill group arranged on the same type of barrel.SOLUTION: In a ballpoint pen refill group arranged on a barrel of the same type having the same outer diameter and the total length of a ballpoint pen refill but different ball diameters of the ballpoint pen tip of the ballpoint pen refill in which the ballpoint pen tip that rotatably holds the ball is attached to an ink storage tube directly or via a joint member, a pattern is printed on the surface of the ink storage tube, and the thickness of the pattern is changed in gradation according to the ball diameter.SELECTED DRAWING: Figure 1
Inventors:
MAKI TAKAYUKI
Application Number:
JP2020054894A
Publication Date:
October 07, 2021
Filing Date:
March 25, 2020
Export Citation:
Assignee:
MITSUBISHI PENCIL CO
International Classes:
B43K7/02