Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1989-07-05
1990-07-03
DeMille, Danton D.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 65, 401 90, 401 57, B43K 2114, B43K 2120
Patent
active
049386263
ABSTRACT:
A lead-replaceable writing implement including an outer tube, an inner rod received in the outer tube and formed with multiple lead channels and a push rod, a rotary tube partially inserted into a lower end of the outer tube, and a lead holder received in the rotary tube and partially protruded beyond the lower end thereof, wherein the multiple lead channels respectively contain several series of leads of different hardness, and the rotary tube is formed with a lead stop whereby when rotating the rotary tube to locate the lead stop right above a lead channel and then push the inner rod upward, the lead stop will stop a lowest lead with desired hardness from rising and drop the stopped lead into the lead holder, and when thereafter pressing the inner rod downward, the push rod thereof will partially protrude the dropped lead beyond the lead holder for writing.
REFERENCES:
patent: 1572133 (1926-02-01), Fleming
patent: 1655417 (1928-01-01), Haack
patent: 2176050 (1939-10-01), Bailey
patent: 2512273 (1950-06-01), Harvey
patent: 2691364 (1954-10-01), Valsecchi et al.
patent: 3918819 (1975-11-01), Liu
patent: 4219282 (1980-08-01), Kuo
patent: 4359290 (1982-11-01), Sekiguchi et al.
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