Mechanical pencil

Details Mechanical pencil Mechanical pencil

1990-05-22

1991-10-01

Johnson, Richard J.

Coating implements with material supply

Solid material for rubbing contact or support therefor

Including means to advance material

401 67, 401 92, B43K 2122

Patent

active

050528386

ABSTRACT:
A mechanical lead pencil having the capability of feeding different diameter leads. A first collet is disposed in the pencil barrel for feeding the lead and a second collet is located at the barrel open end for retaining the lead during use of the pencil. An elastomeric disc is provided between the two collets, having a variable diameter opening at the center thereof for frictionally engaging the lead and preventing its release when the two collets are in the open position.

REFERENCES:
patent: 381612 (1888-04-01), Bussler
patent: 2203160 (1940-06-01), Kovacs
patent: 2520796 (1950-08-01), Bouhier
patent: 2657671 (1953-11-01), Wade
patent: 2700959 (1955-02-01), Einsele
patent: 4452544 (1984-06-01), Sumita

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