Automatic lead feeding apparatus of automatic drafting machine

Details Automatic lead feeding apparatus of automatic drafting machine Automatic lead feeding apparatus of automatic drafting machine

1990-10-30

1993-01-12

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

Stylus feature

G01D 1516

Patent

active

051793938

ABSTRACT:
An automatic lead feeding apparatus is used in an automatic drafting machine adapted to exchange pencil holders between a line drawing head and a writing instrument stocker. The automatic lead feeding apparatus has a unit holder moving in a direction of approach and separation from the writing instrument stocker to take a writing instrument or pencil holder removably arranged on the stocker. In consequence, the pencil holder is exchanged between the writing instrument holder and a writing instrument holder of the stocker. A lead feeding reservoir-stocker has a plurality of lead reservoirs containing plural leads. The lead feeding reservoir-stocker is arranged above the travelling path of the writing instrument holder. Lead is fed one by one from the reservoir-stocker by a shutter placed under the stocker and the lead is pushed in the pencil holder by a predetermined distance by a lead pusher. The lead feeding reservoir-stocker and writing instrument stocker are able to be removed from the base of the automatic lead feeding apparatus.

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