Fluid pump for a writing device having an air ejector feature

Details Fluid pump for a writing device having an air ejector feature Fluid pump for a writing device having an air ejector feature

1976-11-29

1977-10-11

Miller, Jr., George H.

Recorders

Markers and/or driving means therefor

With ink supply to marker

401145, 401150, 417435, G01D 1516, B43K 504, B43K 518, F04B 2100

Patent

active

040539016

ABSTRACT:
A pump mechanism for pumping ink or similar writing fluid from a fluid reservoir to a writing device. A piston is moved in a cylinder in one direction to draw ink into the cylinder from a reservoir through a capillary tube, and is moved in an opposite direction to discharge the ink to a writing device while at the same time, in cooperation with a flexible membrane located in the cylinder and connected to the piston, to discharge any air in the capillary tube back into the reservoir.

REFERENCES:
patent: 3614940 (1971-10-01), Abrams et al.

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