Writing instrument

Details Writing instrument Writing instrument

1976-08-12

1977-08-23

Pellegrino, Stephen C.

Coating implements with material supply

Including means to apply material-moving force

Intercommunicable reservoirs or reservoir sections in series

401153, 401206, 401278, B43K 510

Patent

active

040436810

ABSTRACT:
In a writing instrument comprising a writing core and an ink tank, the contact of the writing core with the ink in the ink tank is intercepted so that unnecessary loss of the ink due to evaporation from the core surface and excessive supply of the ink to the core are effectively prevented. Merely pressing the end portion of the outer case of the writing instrument allows a spring, a valve member and a flexible bellows portion of the ink tank to supply an appropriate amount of ink into the core.

REFERENCES:
patent: 3181539 (1965-05-01), Aston
patent: 3640631 (1972-02-01), Sotir
patent: 3682559 (1972-08-01), Hirota
patent: 3819284 (1974-06-01), Kreuzer

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