Friction body, writing instrument and writing instrument set
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United States of America Patent
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Issued Date -
Aug 16, 2007
app pub date -
Jan 29, 2007
filing date -
Jan 27, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A friction body for allowing an image having reversible thermochromism to change color from a first state to a second state by frictional heat, wherein the above-mentioned frictional body has a contact area ranging from 0.5 to 15 mm.sup.2 when pressed onto a glass plate with a load of 1000 g, a writing instrument containing a reversible thermochromic ink, which is provided with the above-mentioned friction body, and a writing instrument set having the writing instrument containing a reversible thermochromic ink and the above-mentioned friction body.
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