Pen switching mechanism in drum plotters

Details Pen switching mechanism in drum plotters Pen switching mechanism in drum plotters

1983-04-29

1984-12-11

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

Stylus feature

346 49, G01D 930

Patent

active

044881592

ABSTRACT:
A drum plotter has a pen carriage movable back and forth across a sheet of print paper on a platen which is rotatable about its own axis in opposite directions. The pen carriage supports thereon a pen holder unit rotatable for bringing one of pens with differently colored inks into a writing position. The pen in the writing position is pushed by a hammer toward the platen for writing desired characters, figures or the like on the sheet of print paper. The pen holder unit is rotatably actuatable by a ratchet wheel engaged by a pawl member driven intermittently by a cam mounted on a shaft supporting the pen carriage and drivable by a solenoid-operated mechanism.

REFERENCES:
patent: 3763479 (1973-10-01), Jebb
patent: 4299031 (1981-11-01), Collins
patent: 4405931 (1983-09-01), Fujisawa

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