Writing instrument

Details Writing instrument Writing instrument

2006-07-11

2006-07-11

Walczak, David J. (Department: 3751)

Coating implements with material supply

Material flows through porous tool

Wick feed from within reservoir to tool

C401S198000, C401S225000

Reexamination Certificate

active

07073967

ABSTRACT:
A writing instrument can prevent ink stored in an ink intake retainer body from flowing toward an air passage due to volume expansion, shock, etc., of the ink, thereby preventing the stoppage of the air passage and the ink from flowing outside the body. The writing instrument includes, an ink tank, an ink intake retainer body, a tubular drawing tip, and an ink drain restriction body, which has greater porosities than those of the ink intake retainer body. The ink drain restriction body is formed on the part of an air passage of the ink intake retainer body. Therefore, the ink drain restriction body for absorbing and storing the ink, which is drained toward the air passage due to volume expansion, shock flow, etc., is provided in the rear of the ink intake retainer.

REFERENCES:
patent: 3922100 (1975-11-01), Saito
patent: 5906446 (1999-05-01), McCulloch et al.
patent: 6497527 (2002-12-01), Kaufmann

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