Coating implements with material supply – Material flows through porous tool – With removable cap for tool
Patent
1990-03-21
1991-12-31
Apley, Richard J.
Coating implements with material supply
Material flows through porous tool
With removable cap for tool
401213, 401243, B43K 500
Patent
active
050767216
ABSTRACT:
A writing instrument cap having a tubular lower section suitable to embrace a cylindrical body of a writing instrument. An upper section of the cap is formed by a central tubular core and is closed on its top. The upper section receives a writing point of the writing instrument to make an airtight seal. The outer surface of the central tubular core has a plurality of outwardly projecting radial fins whose outer edges define a prolongation of an outer wall of the lower tubular section. The circumference of those fins accounts for less than one-half of the circumference of this prolongation of the outer wall. A plurality of clearances permit the rectilinear flow of air through the cap. Channels are formed between adjoining radial fins, and the cross-sectional area of the clearances is in excess of one-half of the total cross-sectional area between the outer surface of the central tubular core and the prolongation of the outer wall.
REFERENCES:
patent: 4969766 (1990-11-01), Nagle et al.
Apley Richard J.
Crosby D. F.
Dobell S.p.A.
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