Slide-type writing instrument with a dry prevention unit

Details Slide-type writing instrument with a dry prevention unit Slide-type writing instrument with a dry prevention unit

2007-05-22

2007-05-22

Walczak, David J. (Department: 3751)

Coating implements with material supply

Projectable and retractable tool

With movable closure or gate

C401S107000

Reexamination Certificate

active

10887999

ABSTRACT:
A slide-type writing instrument with a dry prevention unit which allows a nib to be extended and exposed to an outside through a non-contact extension operation while sealing a portion around the nib, prevents ink of the nib from being dried up without using any cap, and safely protects the nib. A slide-type writing instrument with a dry prevention unit comprises a shaft to provide a body of the writing instrument, with a nib hole provided at a lower end of the shaft; a knock part inserted into an insert hole provided at an upper end of the shaft; a cartridge inserted into the shaft while being coupled at opposite ends thereof to the knock part and a nib, respectively; first and second springs coupled to the cartridge to elastically bias the cartridge in an axial direction of the cartridge; a link holder provided in the shaft and supported by the first spring; a link slidably inserted into the link holder and supported by the second spring, the link including a link projeciion to engage with a guide groove provided on a predetermined portion of the cartridge; and a spherical door having a pin slit to engage with a parallel pin of the link.

REFERENCES:
patent: 1923634 (1933-08-01), Markstein
patent: 2590943 (1952-04-01), Coskey et al.
patent: 4629348 (1986-12-01), Hashimoto et al.
patent: 6371129 (2002-04-01), Le Bras-Brown et al.

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