Writing instrument with ball point and two reservoirs

Coating implements with material supply – Including ball – roller or endless-belt tool – Ball

Patent

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Details

401151, 401210, 401217, 401230, B43K 700, B43K 708

Patent

active

045360995

ABSTRACT:
A ball-point writing instrument in which dislodging of the rotating ball as a result of accidental droppage on a hard surface is prevented by employing an ink reservoir construction designed to prevent propagation of a travelling pressure step in the column of ink above the rotating ball.

REFERENCES:
patent: 2883969 (1959-04-01), Sams

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