Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1990-11-07
1992-12-01
Fuller, Benjamin R.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, G01D 1518
Patent
active
051682850
ABSTRACT:
An ink jet pen has two modes of operation, a normal speed mode and a high speed mode. In the normal speed mode, the pen's ink reservoir is maintained at a desired below-atmospheric pressure by a bubble generator orifice that introduces air from an atmospherically vented chamber into the reservoir to relieve the partial vacuum caused by ejection of ink. In the high speed mode, a heater heats air trapped in the ink reservoir. As the air tries to expand, it pressurizes the ink and causes it more quickly to refill the pen's ink-ejecting nozzle after firing. The pen can thus be fired at a faster rate. The bubble generator orifice is blocked during the high speed mode by the first droplet of ink expelled through the orifice, which acts to wet and seal a vent tube.
REFERENCES:
patent: 4503443 (1985-03-01), Dagna et al.
patent: 4620202 (1986-10-01), Koto et al.
Fuller Benjamin R.
Hewlett--Packard Company
Preston Gerald E.
LandOfFree
Modal ink jet printing system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modal ink jet printing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modal ink jet printing system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-505210