Mechanical pencil
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 1981
Grant Date -
N/A
app pub date -
Apr 17, 1979
filing date -
Apr 19, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanical pencil having a main hollow body including a first body member and a second body member with a mouth opening at an end and the first body member being rotatable with respect to the second body member and the first and second body members engaged with each other. A slider is retractable from the opening of the main hollow body and has a lead retainer for frictionally gripping lead and a lead case containing extra leads therein is disposed to the rear and is so biased. A lead gripping chuck is connected at the rear end thereof to said lead case and chuck tightening mechanism receives and tightens the chuck and advancing the chuck relative to the mechanism to supply a new lead having a predetermined length from the opening of the slider. The rotational movement of the first body member is transferred to reciprocating movement of the chuck tightening mechanism so that a new lead is supplied from the opening of the main hollow body by the rotation of the first body member.
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