Title:
BALL-POINT PEN TIP
Document Type and Number:
Japanese Patent JP2004261991
Kind Code:
A
Abstract:
To provide a ball-point pen which has a ball as a writing member rotating smoothly and supplies an appropriate amount of ink to the surface to be written, and gives a comfortable touch of writing.
This ball-point pen tip is characterized in that the irregular surface condition of the ball is represented in a histogram and the ball which is designed in the way that the sum of the frequencies of a higher level than the level indicating a value of highest frequency falls within the range of 70 to 40% of the total measurement points, is used.
Inventors:
UEDA YOSHIYA
TAKAHASHI YUICHI
NAGAKI TAKESHI
TAKAHASHI YUICHI
NAGAKI TAKESHI
Application Number:
JP2003052463A
Publication Date:
September 24, 2004
Filing Date:
February 28, 2003
Export Citation:
Assignee:
PENTEL KK
International Classes:
B43K1/08; (IPC1-7): B43K1/08
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