Writing instrument with overflow chamber and return to supply

Details Writing instrument with overflow chamber and return to supply Writing instrument with overflow chamber and return to supply

1983-06-14

1985-04-09

Bratlie, Steven A.

Coating implements with material supply

Including ball, roller or endless-belt tool

Ball

401151, 401209, 401224, 401225, 401229, 401230, B43K 708, B43K 710, B43K 518

Patent

active

045098760

ABSTRACT:
A writing instrument of an extremely simple structure in which stored ink previously extruded upon increase of the internal pressure of an ink chamber is subsequently sucked up by decrease of the internal pressure of the ink chamber and returned to the ink chamber, thereby preventing the outputting of ink drops in a downward orientation of pen, particularly when a large amount of ink is stored.

REFERENCES:
patent: 2921558 (1960-01-01), von Platen
patent: 3905709 (1975-09-01), Bok

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