Device for preventing drying of ink in writing instrument

Details Device for preventing drying of ink in writing instrument Device for preventing drying of ink in writing instrument

1985-10-11

1990-03-27

Bratlie, Steven A.

Coating implements with material supply

Material flows through porous tool

With removable cap for tool

401213, 401243, 401262, 401269, B43K 900, B43K 500, B43K 700, B43K 800

Patent

active

049115715

ABSTRACT:
A device for preventing drying of ink in a writing instrument, in particular, a writing instrument provided with a tubular holder made of synthetic resin. The writing instrument is internally provided with a tubular ink-cartridge containing ink and a liquid retainer impregnated with liquid whose vapor pressure is higher than that of the liquid in the ink in the ink-cartridge, provided in an inner space of the holder so as to control evaporation of ink from the cartridge by the use of vapor evaporating from the impregnated retainer.

REFERENCES:
patent: 752917 (1904-02-01), Morse
patent: 962053 (1910-06-01), von Rottenburg
patent: 2673362 (1954-03-01), Robinson
patent: 4191482 (1980-03-01), Ploeger

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