Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1998-08-11
1999-11-23
Eloshway, Charles R.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 77, B43K 2108, B43K 2110
Patent
active
059889160
ABSTRACT:
A rotary type automatic pencil includes a front socket member fastened to a sleeve at the bottom to hold a guide tube, a rotary member mounted within the front socket member around the guide tube, a helical spring mounted around the guide tube and fastened to the rotary member, a lead holder tube and a propelling element mounted inside the guide tube, wherein rotating the rotary member causes the helical spring to force the lead holder tube and the propelling element upwards/downwards along a longitudinal sliding slot of the guide tube; the propelling element is lowered to push the lead out of the lead holder tube when the lead holder tube is stopped in a lower limit position and the rotary member is continuously rotated.
REFERENCES:
patent: 1328300 (1920-01-01), Saunders
patent: 1411116 (1922-03-01), Mason, Jr.
patent: 1463803 (1923-08-01), De Witt
patent: 1539468 (1925-05-01), Cook et al.
patent: 1568951 (1926-01-01), Ballou
patent: 1734784 (1929-11-01), Vierling et al.
patent: 1849210 (1932-03-01), Welsh
patent: 1912674 (1933-06-01), Wehn
patent: 2110551 (1938-03-01), Freidlein et al.
patent: 2492234 (1949-12-01), Melchiorre
patent: 3477791 (1969-11-01), Yamashita
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