Long life pen and ink supply unit for X,Y plotter and the like a

Details Long life pen and ink supply unit for X,Y plotter and the like a Long life pen and ink supply unit for X,Y plotter and the like a

1990-04-12

1992-03-31

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346140A, 346140R, 346139R, 33 181, G01D 1516, B43L 1300

Patent

active

051012197

ABSTRACT:
In a plotter or other device for drawing inked lines on a receiving surface, an ink reservoir holding a large quantity of ink is provided to attain a long operational life for the associated pen. The reservoir includes a piston or other moveable working member to which air pressure is applied for pressurizing the ink, and the ink reservoir and associated pen are permanently connected with one another and with a few ancillary parts to provide a unit assembly readily connected to and disconnected from a pen head to permit quick exchange of units without danger of ink spillage. The ink reservoir is transparent or translucent to give the operator a visual indication of when the unit assembly is in need of replacement because of imminent ink exhaustion, and sensor may also be provided for automatically producing an electrical "out of ink" signal which appears upon the complete exhaustion of ink from the unit.

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patent: 4929109 (1990-05-01), Ikenga
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patent: 4937594 (1990-06-01), Niemeyer
patent: 5005296 (1991-04-01), Gerber

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