Pump device for electrostatic plotter

Details Pump device for electrostatic plotter Pump device for electrostatic plotter

1991-09-25

1992-05-05

Grimley, A. T.

Coating apparatus

Control means responsive to a randomly occurring sensed...

3461531, 355256, G03G 1510

Patent

active

051097940

ABSTRACT:
A pump device for an electrostatic plotter discharges through a discharge passage a liquid toner drawn from a first suction passage to supply the liquid toner to a liquid toner supplier unit of the plotter. A restriction is provided to adjust the flow of the liquid toner through the first suction passage. A second suction passage joins the first suction passage downstream of the restriction. Negative pressure is generated in the first suction passage downstream of the restriction to suck the liquid toner from a suction port unit of the plotter through the second suction passage.

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patent: 4198923 (1980-04-01), Blumenthal
patent: 4290076 (1981-09-01), McFarland
patent: 4613226 (1986-09-01), Kimura et al.
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patent: 4793281 (1988-12-01), Dobbins et al.
patent: 4851317 (1989-07-01), Chuang et al.
patent: 4965597 (1990-10-01), Ohigashi et al.
patent: 5043756 (1991-08-01), Takabayashi et al.

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