Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1986-01-17
1987-10-13
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
222 55, 417 45, 417472, G01D 1516
Patent
active
047002050
ABSTRACT:
A hydraulic servomechanism for controlling the pressure of ink supplied to an ink jet printer head includes a bellows located between an ink source and the head and arranged for expansion and contraction to decrease and increase the pressure of ink in the bellows.
Pressure is sensed at the bellows output connected to the ink head and the sensed pressure is compared to a desired ink pressure to produce a driving signal which excites an electromagnetic driver coupled to the bellows. The driver applies a force to the bellows to adjust the pressure to the desired pressure. A position sensing switch is responsive to the volume of the bellows and controls a valve located between an ink source and the bellows input to maintain the volume of ink in the bellows within a predetermined volumetric range.
REFERENCES:
patent: 3787882 (1974-01-01), Fillmore
patent: 3950762 (1976-04-01), Anderka
patent: 4084165 (1978-04-01), Skafvenstedt
patent: 4314263 (1982-02-01), Carley
patent: 4475116 (1984-10-01), Sicking
patent: 4562445 (1985-12-01), Rich
patent: 4599626 (1986-07-01), Rich
patent: 4651161 (1987-03-01), Rich
Blake Dale G.
Rich Leonard G.
Hartary Joseph W.
Metromedia Company
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