Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1981-06-30
1983-07-05
Griffin, Donald A.
Recorders
Markers and/or driving means therefor
With ink supply to marker
G01D 1518
Patent
active
043921477
ABSTRACT:
An apparatus for supplying a liquid writing medium to the writing unit of a writing or drawing device has a writing unit connected by a flow line to a dip tube in a container for a liquid writing medium. The bottom of the container is located in substantially the same horizontal plane as the writing tip of the writing unit. From a suitable source, air is supplied under pressure to the surface of the writing medium within the container. The surface area of the writing medium within the container is greater than the surface area of the writing medium within the writing unit. A regulating valve connected between the container and source of air under pressure regulates the flow of liquid writing medium by supplying writing medium when the writing unit is operative and interrupting the writing medium when the writing unit is nonoperative.
REFERENCES:
patent: 2606093 (1952-08-01), Reason
patent: 3543279 (1970-11-01), Rempel et al.
patent: 3719952 (1973-03-01), Elbaum
patent: 3835881 (1974-09-01), Dal et al.
patent: 3906513 (1975-09-01), Siegelman et al.
patent: 3943527 (1976-03-01), Hartmann
Griffin Donald A.
J. S. Staedtler KG
Jaskiewicz Edmund M.
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