Writing implement

Details Writing implement Writing implement

2011-05-10

2011-05-10

Nguyen, Tuan N (Department: 3751)

Coating implements with material supply

Bifurcate pointed nib tool

Including reservoir and feeder

C401S223000, C401S227000, C401S241000, C401S242000

Reexamination Certificate

active

07938592

ABSTRACT:
A refill of a low viscosity water-based ink ballpoint pen is provided with a housing, a pen tip attached to a front end of the housing, an ink tank (4) formed inside the housing, an ink guide member guiding ink in the ink tank (4) to the pen tip, and an air passage formed between the ink tank and the pen tip in the housing and connecting the ink tank and outside of the housing. The inside of the ink tank is divided by partition walls (11) into a plurality of ink chambers arranged in the longitudinal direction, and the ink guide member is used to guide the ink in these ink chambers from the ink chambers close to the pen tip successively to the pen tip. A substantially uniform clearance (13) is provided over the entire circumferences between the outer circumferential surface of each partition wall (11) and the inner circumferential surface of the ink tank (4). A ring-shaped ink film formed at each clearance (13) is used to hold the ink in each ink chamber. Air flows into the ink chamber through the clearance (13).

REFERENCES:
patent: 3129696 (1964-04-01), Sklar
patent: 4770558 (1988-09-01), Frietsch
patent: 5087144 (1992-02-01), Wada et al.
patent: 5957609 (1999-09-01), Morita et al.
patent: 6607325 (2003-08-01), Hori
patent: 2003/0068191 (2003-04-01), Hori
patent: 2005/0249542 (2005-11-01), Hori
patent: 1 023 240 (1953-03-01), None
patent: 62-220400 (1987-09-01), None
patent: 2001-001682 (2001-01-01), None
patent: 2001-315483 (2001-11-01), None
patent: 3436728 (2003-06-01), None
patent: 2004-050694 (2004-02-01), None
patent: WO 2004/00575 (2003-12-01), None
Office Action dated Mar. 23, 2010, in counterpart Chinese Application No. 200780033045.7, 4 pages.
Explanation Brief filed Feb. 7, 2008 in counterpart Japanese Application No. 2006-244552, 1 page, with English translation, 2 pages.
Supplementary European Search Report dated Jul. 21, 2010, in corresponding EP 07806558.8, 9 pages.

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