Coating implements with material supply – Material flows through porous tool – With removable cap for tool
Patent
1996-12-26
1999-07-27
Walczak, David J.
Coating implements with material supply
Material flows through porous tool
With removable cap for tool
401243, B43K 500
Patent
active
059278870
ABSTRACT:
A cap for a writing instrument is provided with a suffocation preventive construction. Thus, if a curious child or the like should accidentally swallow the cap and the cap lodges in the child's throat or bronchus, a sufficient flow of air is provided to avoid suffocation. Particularly, a cap for a writing implement of a double-tube construction is provided with an air communicating portion positioned in an inner peripheral surface of an outer tube having open front and rear portions. An inner tube having a closed end is held coaxially within the outer tube, and a predetermined clearance is provided to enable communication between the air communicating portion, defined by space between the outer tube and the inner tube, and a front-end opening of the outer tube. The predetermined clearance is provided between an inclined lower end of a tapered portion provided in a front-end opening of the inner tube and the inner peripheral surface of the outer tube, whereby the permeability of the cap is not impaired by ink adhered to the tapered portion during the process of mounting of the cap to the axial tube of the writing implement.
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patent: 5203637 (1993-04-01), Nishimura et al.
Ishikawa Shin-ichi
Nishimura Makoto
Walczak David J.
Zebra Co. Ltd.
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