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US 3,993,409 AGranted
Coloring pen assembly
OwnerUna L. Hartinventor
Life of this patent
Estimating the term…
Abstract
A coloring pen assembly comprising a tubular barrel open at one end and holding at the other end a porous nib having a marking tip, an extended portion lying within the barrel, and saturated with soluble coloring matter. For activation, a porous plug fitting loosely within the barrel and snugly around the extended portion of the nib is saturated with a liquid solvent, e.g. water, and is inserted through the open end of the barrel and pressed into place.
Claims6
A marking pen assembly comprising:
- a tubular barrel having an open end and a constricted end;
- a relatively rigid porous nib projecting from and held by said constricted end and extending into the elongated tubular body of the barrel, and impregnated with soluble coloring matter;
- a cap removably tightly fitting said open end;
- and a solvent-absorptive, porous, dimensionally stable plug dimensioned and constructed to fit loosely within said body and snugly about the extended nib when forced into said body.
1 more element
Dependencies are inferred from the claim text.