Ink compensating chamber for scriber

Details Ink compensating chamber for scriber Ink compensating chamber for scriber

1978-01-03

1980-06-10

Coven, Edward M.

Coating implements with material supply

Including stylus

401225, 401242, B43K 518

Patent

active

042070120

ABSTRACT:
A capillary writing pen of the type having an expansion or compensation chamber intermediate the ink reservoir and ambient air. The expansion chamber is improved such that inadvertent flowing of ink from the reservoir to the capillary pen tip due either to pressure or temperature changes is avoided. The interior wall of the expansion chamber is profiled as a contiguous series of transverse indentations which extend circumferentially about the tubular pen body to provide successive expansion areas for entrapment of air and constrictive areas where menisci of ink are formed. The forming of the menisci entraps air bubbles within the ink and, accordingly, provides increased resistance to capillary flow of ink.

REFERENCES:
patent: 2795211 (1957-06-01), Nichols
patent: 3306267 (1967-02-01), Matsumoto
patent: 3594092 (1971-07-01), DiCarlo
patent: 3824023 (1974-07-01), Danjczek et al.
patent: 3905709 (1975-09-01), Bok

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