Patent ID: 6588963
Filing Date: 2003-07-08
Classification: B43K,Y02E,Y02P

Abstract:
A collector type writing instrument including: a point assembly with a writing point at a tip thereof, an ink tank for storing a low viscosity ink in a free-state ink condition, an ink feeder portion extended from the ink tank to the point assembly, and a collector disposed between the ink tank and the point assembly as an adjuster element for storing ink within a plurality of grooves when an inner pressure is adjusted,the writing instrument characterized in that:the ink tank is formed therein with a snorkel having, integrally or as a separate part, a sectioning portion for substantially separating the ink tank without an ink conduit into a front tank and a rear tank, and a vent portion for establishing air communication between the front and rear spaces divided by the sectioning portion, the ink conduit is sized so as to be more unlikely to pass air than the vent portion does, and is formed in the sectioning portion, an inner wall of the ink tank, or both of the sectioning portion and the inner wall of the ink tank, the vent portion of the snorkel allows an air bubble to pass through, and has a front opening arranged at a rear end side of the collector and a rear opening arranged at a approximate center of, or at a position more rearward than, the ink tank, and the snorkel is molded of the same material as the collector is or is subjected to the same surface reforming treatment as the collector is, so that the snorkel is equivalent in wettability to the collector.