Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1989-04-11
1990-09-18
Johnson, Richard J.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 81, B43K 2122
Patent
active
049573837
ABSTRACT:
A lead propelling device for an automatic pencil includes an upper tubular body which has a through-hole tapering downward and a first lead clamping face at the lower end of the through-hole, the tubular body being split along an axial plane thereof to permit the first clamping face to move between a clamping position and a releasing position, and a corrugated hollow member connected to the tubular member and having a corrugated wall with a plurality of indented annular portions defining second lead clamping faces which are movable between a clamping position and a releasing position thereof. The second clamping faces are in the clamping position when the first clamping face is in the releasing position thereof. A cone-shaped lead guide member is provided in the tapered end of the pencil tube and has a bottommost tube portion to protrude outward from the tapered end. The lead guide member is movable between a protruding position and a retracted position to propel and draw in the lead rod.
REFERENCES:
patent: 1737862 (1929-12-01), Morris
patent: 3864046 (1975-02-01), Butka
patent: 4478529 (1984-10-01), Morio
patent: 4705419 (1987-11-01), Niemeyer
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