Pen cap with pressure relief means

Details Pen cap with pressure relief means Pen cap with pressure relief means

1998-08-19

1999-11-02

Recla, Henry J.

Coating implements with material supply

Bifurcate pointed nib tool

Including reservoir and feeder

401202, 401213, 401247, B43K 2312

Patent

active

059757833

ABSTRACT:
A pen cap for closing on a ball-point pen to prevent ink leakage, the pen cap including a cap body, a sealing cap covered on the cap body, and a ball valve mounted inside the cap body within the sealing cap and moved between inside ribs in the cap body and inside ribs in the sealing cap. Closing the pen cap on the pen causes excessive air to pass through an air passage formed by gaps among the inside ribs to the outside of the pen cap via an exhaust hole on the sealing cap, and the air passage is closed when the writing tip of the pen is engaged into a tapered hole on one cylindrical rod projecting from the ball valve.

REFERENCES:
patent: 4380403 (1983-04-01), Endres et al.
patent: 4627757 (1986-12-01), Manusch et al.
patent: 4844642 (1989-07-01), Inaba et al.
patent: 5127754 (1992-07-01), Mase
patent: 5441356 (1995-08-01), Cho

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