Unitary body plotter pen

Details Unitary body plotter pen Unitary body plotter pen

1993-01-19

1995-05-30

Fuller, Benjamin R.

Recorders

Markers and/or driving means therefor

With ink supply to marker

G01D 1516

Patent

active

054206154

ABSTRACT:
A unitary plotter pen construction useful as a disposable plotter pen. A writing tube is provided centrally and at the front end of a unitary hard plastic body element that defines a writing tube nib; a housing for a soft plastic pressure equalization chamber and an ink reservoir; and an adaptor structure for mounting with a plotter head. An axially extending pressure-equalization chamber is defined by soft plastic, lamella vent channel element that is inserted from the rear and axially against inner surfaces of the hard plastic body element. An upper end of the pressure-equalization chamber connects to the ink supply and a lower end connects to ambient air, through an annular cavity at the front end of the unitary body element. That annular cavity also may include transverse capillary spaces as a further protection against ink leakage from the pressure equalization chamber.

REFERENCES:
patent: 4382707 (1983-05-01), Anderka
patent: 4556336 (1985-12-01), Sano et al.
patent: 4662769 (1987-05-01), Goh
patent: 4728214 (1988-03-01), Mutschler
patent: 4928121 (1990-05-01), Raahauge
patent: 4930921 (1990-06-01), Anderka
patent: 5172995 (1992-12-01), Felgentreu

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