Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1980-10-27
1985-10-01
Coven, Edward M.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 68, 401 75, B43K 2108
Patent
active
045442967
ABSTRACT:
A mechanical pencil is disclosed that includes a barrel with a non-circular internal bore, a helical coil member that is fitted within the bore and attached to an externally positioned driving member, and a lead positioning means or pusher member that is positioned about and threadably engaged with the coil and constrained by the non-circular bore of the barrel for sliding longitudinal movement therein. The lead positioning means or pusher member includes fins that extend through the coil turns and act as a positioning stop for the writing lead and a lead gripping means for propelling and repelling the centrally disposed writing lead upon the manual rotation of the external driving member that is attached to the coil disposed within the barrel.
REFERENCES:
patent: 1579029 (1926-03-01), Rang
patent: 1621990 (1927-03-01), Lippert et al.
patent: 1734784 (1929-11-01), Vierling et al.
patent: 2203093 (1940-06-01), Kahn
patent: 2427941 (1947-09-01), Bauer
patent: 2464035 (1949-03-01), Hasselquist
patent: 2492838 (1949-12-01), Brubaker
patent: 2624313 (1953-01-01), Jacobsen et al.
Jarvis William A.
Kirby John
Lane Alan J.
Pokorski John P.
Sheffield Wilbur L.
Coven Edward M.
Scripto, Inc.
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