Orifice band ink jet printer with ink confined by a counterpress

Recorders – Record receiver deforming

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Details

346 11, G01D 1518, G01D 900

Patent

active

044293160

ABSTRACT:
In an orifice band ink jet printer, an endless band having orifices therethrough moves in a separation between an air bearing and a source of liquid ink under high pressure which flows through the orifices to form jets. The ink also leaks from a gap between the orifice band and the source of ink with undesirable effects.
The invention confines the ink by a counterpressure of air at substantially the same pressure as the ink. In one embodiment, two adjacent air channels surround the gap. A first air channel adjacent to the gap contains air at a slightly lower pressure than the ink to preclude entry of air into the ink, but some ink may lead from the gap. A second air channel adjacent to the first contains air at a slightly higher pressure than the ink to confine the ink which may have leaked from the gap.

REFERENCES:
patent: 3971040 (1976-07-01), Skala
patent: 3972053 (1976-07-01), Skala
patent: 4064513 (1977-12-01), Skala
patent: 4117518 (1978-09-01), Skala

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