Title:
JIDOSEIZUKITONO PENSHIRUSOCHI
Document Type and Number:
Japanese Patent JPS5114424
Kind Code:
A
Abstract:
An automatic pencil apparatus for use with an automated drafting system comprises a gripping mechanism for releasably gripping a lead and comprised of a cylindrical tube, and a collet mounted for longitudinal movement in the tube for gripping and releasing the lead. A driving mechanism including an electromagnet selectively drives the gripping mechanism to actuate the collet and release the lead so that a drawing operation can be carried out. A pneumatic cylinder applies a predetermined constant pressure to the lead while in its released state thereby pressing the lead into contact with a drafting paper under constant pressure so that high quality lines can be drawn throughout consumption of the lead and independent of lead wear.
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Inventors:
EDO TAKESHI
Application Number:
JP8589674A
Publication Date:
February 04, 1976
Filing Date:
July 26, 1974
Export Citation:
Assignee:
SEIKO INSTR & ELECTRONICS
International Classes:
B43K21/02; B43L13/00; B43L13/02; G01D15/24; B43K21/16; (IPC1-7): B43K17/00; B43K21/16; B43K21/20; B43K21/22
Domestic Patent References:
| JPS49133125A | 1974-12-20 |