Writing instrument

Details Writing instrument Writing instrument

2005-04-26

2005-04-26

Walczak, David J. (Department: 3751)

Coating implements with material supply

Material flows through porous tool

With flow-regulator

C401S205000, C401S198000

Reexamination Certificate

active

06883996

ABSTRACT:
A writing instrument has a felt pen core held in a leading holder at the leading end of a pen shaft. The pen core is movable along the longitudinal direction of the pen shaft and is pressed in the longitudinal direction to supply ink stored in an ink storage chamber inside the pen shaft to the pen core. A base end portion includes a projection with a tapered outer side surface that narrows the projection in the tail direction. The projection is lower than an engaging portion and is movable along the longitudinal direction between the engaging portion and the leading end of the pen shaft. A notch is formed in a base-end surface of the base end portion and extends in the upper direction. The projection undergoes an elastic deformation to narrow the width of the notch, thereby narrowing a maximum width of the projection.

REFERENCES:
patent: 3468611 (1969-09-01), Ward
patent: 4693623 (1987-09-01), Schwartzman
patent: 6406205 (2002-06-01), Hu
patent: 6497527 (2002-12-01), Kaufmann
patent: 6641320 (2003-11-01), Ballot et al.
patent: 10-157379 (1998-06-01), None
patent: WO 0130510 (2001-05-01), None

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