Title:
THERMOCHROMIC WRITING INSTRUMENT
Document Type and Number:
Japanese Patent JP2017200748
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a thermochromic writing instrument suitable for usage by a user having low-writing pressure, such as children and elders.SOLUTION: A thermochromic writing instrument includes a refill 10 having thermochromic ink with a ball-point pen tip to be a writing part at the tip thereof. The ball-point pen tip 14 includes: a writing ball 16; and a holder 17 holding the writing ball 16 at the tip thereof, where an amount of ink outflow per 100 rotation of the writing ball 16 is 1.5 mg or more and 4.5 mg or less. A pressurizing mechanism 40 is preferably provided at a rear end of the refill 10 that is a rear part of the writing instrument.SELECTED DRAWING: Figure 1
Inventors:
MAKI TAKAYUKI
Application Number:
JP2016093514A
Publication Date:
November 09, 2017
Filing Date:
May 07, 2016
Export Citation:
Assignee:
MITSUBISHI PENCIL CO
International Classes:
B43K1/08; B43K7/10; B43K7/12
Domestic Patent References:
| JP2011240503A | 2011-12-01 | |||
| JPH09248991A | 1997-09-22 | |||
| JP2012045821A | 2012-03-08 | |||
| JP2006508820A | 2006-03-16 | |||
| JP2005066891A | 2005-03-17 | |||
| JP2002052884A | 2002-02-19 | |||
| JP2011011391A | 2011-01-20 | |||
| JP2003011574A | 2003-01-15 |
Foreign References:
| US6340261B1 | 2002-01-22 |
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