Writing device for recorders, measuring instruments and the like

Details Writing device for recorders, measuring instruments and the like Writing device for recorders, measuring instruments and the like

1979-11-07

1982-03-16

Coven, Edward M.

Recorders

Markers and/or driving means therefor

With ink supply to marker

401 48, 401134, G01D 1516

Patent

active

043204058

ABSTRACT:
Recording or measuring equipment is provided with a spring clamp or clip for holding a replaceable writing unit by the ink reservoir of the writing unit. The reservoir carries a pen with a fiber or laminar tip and has a vent at or near the end shaped for insertion in the clamp or clip. A plug equipped with a gripping knob is inserted in the vent and the vent is so located that when the plug is so inserted, the ink reservoir cannot be inserted into and held by the clamp or clip, thus assuring that the vent is opened before the pen goes into use.

REFERENCES:
patent: 3140912 (1964-07-01), Davis et al.
patent: 3399019 (1968-08-01), Koelichen
patent: 3610765 (1971-10-01), Bok
patent: 3788753 (1974-01-01), Stewart
patent: 4048640 (1977-09-01), Caldwell
patent: 4100549 (1978-07-01), Hubbard
patent: 4188408 (1980-01-01), Pelensky et al.

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