Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1982-03-08
1983-09-13
Griffin, Donald A.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346 75, G01D 1518
Patent
active
044045662
ABSTRACT:
An ink jet fluid system and process of startup and shutdown is provided which includes a print head having a fluid manifold and at least one orifice for forming a jet drop printing stream. Inlet and outlet valves are connected to inlet and outlet openings of the print head. During shutdown, fluid is continuously circulated around the print head through a bypass line while the outlet of the print head is connected to a source of reduced pressure to prevent fluid from flowing through the orifice. At startup, the inlet and outlet valves are actuated to provide a continuous flow of fluid under pressure to the print head. In another embodiment of the invention, a fluid system is provided for a multiple print head device and provides for independent control of the fluid pressure in each print head.
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Ayers Scott D.
Clark Frederic L.
Griffin Donald A.
The Mead Corporation
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