Writing implement refill and writing implement
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United States of America Patent
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Oct 20, 2015
Grant Date -
May 22, 2014
app pub date -
Dec 18, 2013
filing date -
Oct 10, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A writing implement that prevents flow of air into an ink tank and prevents writing failure while allowing for productivity. The writing implement includes a writing implement refill having: an ink tank composed of films storing ink; a joint connected to a tip of the ink tank; and a writing tip connected to a tip of the joint. An inner circumferential surface of the tip of the ink tank covers an outer circumferential surface of a rear end of the joint. A covering member of a ring shape covers from outside an area where the tip of the ink tank covers the outer circumferential surface of the rear end of the joint.
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