Ink-storing body for writing utensil

Details Ink-storing body for writing utensil Ink-storing body for writing utensil

2006-06-20

2006-06-20

Nguyen, Tuan (Department: 3751)

Coating implements with material supply

Bifurcate pointed nib tool

Including reservoir and feeder

Reexamination Certificate

active

07063475

ABSTRACT:
An ink reservoir for a Writing instrument molded from a gas barrier resin such as polyvinyl alcohol, an ethylene vinyl alcohol copolymer resin, polyacrylonitrile, polyamide, a cellulose resin, polyester, polycarbonate and polystyrene, wherein a vapor-scarcely permeable coating layer having a vapor permeability (P1) of 0.5 g/m2* atm*24hr/25 μm or less at 40° and 90% RH is formed on the above reservoir for a writing instrument. In this ink reservoir for a writing instrument, a gas barrier property is not reduced under the environment of high moisture even if a wall of the ink reservoir is relatively thin and a resin having an excellent transparency is used, and releasing of pressurized air in the ink reservoir and falling of the tip member are not caused.

REFERENCES:
patent: 5700534 (1997-12-01), Shibazaki et al.
patent: 9-141180 (1997-06-01), None
patent: 9-192582 (1997-07-01), None
patent: 10-192770 (1998-07-01), None
patent: 10-236065 (1998-09-01), None
patent: 2002-11989 (2002-01-01), None
patent: 2002-307890 (2002-10-01), None

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