Geometrical instruments – Scriber – Writing
Patent
1989-11-22
1991-02-12
Shoap, Allan N.
Geometrical instruments
Scriber
Writing
346139C, 346139R, G01D 1516
Patent
active
049913000
ABSTRACT:
A lead automatic supply device for an X-Y plotter has a writing implement stocker connected to a first rotary drive device, and a lead supply stocker rotatably disposed above the writing implement stocker. The lead supply stocker is connected to a second rotary drive device, and a circular line passing through lead storage containers provided in the lead supply stocker and a circular line passing through writing implements retained on the writing implement holding portion of the writing implement stocker lie in the same cylindrical plane. A lead fall hole is provided in the bottom portion of each lead storage container, and an opening/closing mechanism is provided at the lower part of the lead fall hole for opening and closing the lead fall hole. An opening/closing control for controlling the opening/closing mechanism and a lead push down mechanism for pushing the lead downward from the mechanism are also provided. The writing implement stocker can rotatably shift an empty writing implement to a lead supply position, and the lead supply stocker rotates a desired lead storage container to a position immediately above the empty writing implement. In this condition, the lead in the lead storage container is caused to fall downward through the lead fall hole toward the writing implement without a lead located below the lead fall hole by opening the opening/closing mechanism, and the lead is pushed into the writing implement by the lead push-down mechanism.
REFERENCES:
patent: 3293658 (1966-12-01), Sicking
patent: 3939482 (1976-02-01), Coffer
patent: 4324047 (1982-04-01), Roch
patent: 4683476 (1987-07-01), Ferrari et al.
patent: 4812858 (1989-03-01), Murray
patent: 4825556 (1989-05-01), Goldfarb
patent: 4905016 (1990-02-01), Kobayashi et al.
Dowling William C.
Mutoh Industries Ltd.
Shoap Allan N.
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