Patent ID: 6769827
Filing Date: 2004-08-03
Classification: B43K

Abstract:
A collector type writing instrument comprising: a point assembly having a writing point at the front end thereof; an ink tank for storing free-state, relatively low-viscosity ink having a viscosity of 2 to 100 mPaÂ·s at normal temperature; a feeder portion for feeding ink from the ink tank to the writing point; and a collector as a regulator for regulating the internal pressure by making use of capillary effect, the collector type writing instrument further comprises an air/liquid exchanger capable of allowing ink and air to move between the collector and the ink tank and capable of holding ink by a capillary attraction, and a passage hole formed from an outer side surface of the collector toward an inner hollow of the collector, the passage hole being formed so as to present a smaller capillary attraction than that of an air/liquid exchanger and that of the feeder portion.