Writing instrument's cap with safety vent

Details Writing instrument's cap with safety vent Writing instrument's cap with safety vent

1991-09-03

1992-07-07

Bratlie, Steven A.

Coating implements with material supply

Material flows through porous tool

With removable cap for tool

401213, 401243, 401247, B43K 900

Patent

active

051277549

ABSTRACT:
A writing instrument's cap includes a main cylinder; and an inner cylinder fixedly fitted in the main cylinder includes: a cup-shpaed upper portion having a bottom, an annular flange provided to an upper end thereof, and a large diameter portion provided below the annular flange; and a cylindrical lower portion extended from the bottom of the cup-shaped upper portion in such a manner that the cylindrical lower portion is opened at the other end, wherein a vent member for communicating an interior of the cap with an outside air is provided to a wall of the cup-shaped upper portion.

REFERENCES:
patent: 4018536 (1977-04-01), Brenner
patent: 4643605 (1986-02-01), Iwasaki
patent: 4969766 (1990-11-01), Nagle et al.
patent: 5000603 (1991-03-01), Isoda
patent: 5000604 (1991-03-01), Isoda

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