Writing implement

Details Writing implement Writing implement

2006-11-28

2006-11-28

Huynh, Khoa D. (Department: 3751)

Coating implements with material supply

Including ball, roller or endless-belt tool

With flow-regulator

C401S220000, C401S209000, C401S216000, C401S214000, C401S208000

Reexamination Certificate

active

07140799

ABSTRACT:
A writing implement, wherein elements forming a reverse flow prevention mechanism are formed in rather simple shapes and assembly process for the reverse flow prevention mechanism is rather simplified. The reverse flow prevention mechanism (19) comprises a valve chamber (54b), an inflow port (55) opened to the ink storage part (16) side of the valve chamber (54b), an outflow port (56) opened to the writing tip (17) side of the valve chamber (54b), a valve element (57) stored in the valve chamber (54b), a restricting body (58) stored in the valve chamber (54b) at a position on the outflow port (56) side of the valve element (57), and a valve seat (54c) formed around the inflow port (55). When the writing tip (17) is faced upward, the inflow port (55) is closed by the valve element (57), and when faced downward, the valve element (57) is allowed to touch the restricting body (58) and does not reach the outflow port (56).

REFERENCES:
patent: 5709493 (1998-01-01), Kobayashi et al.
patent: 5711626 (1998-01-01), Kobayashi et al.
patent: 5915871 (1999-06-01), Kobayashi et al.
patent: 5929135 (1999-07-01), Wasai et al.
patent: 6536969 (2003-03-01), Nishitani
patent: 57-136780 (1982-08-01), None
patent: 4-52067 (1992-12-01), None
patent: 3197422 (2001-06-01), None
patent: 3275217 (2002-02-01), None

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