Recorders – Performance of multiple functions of steam and gas engines – Pressure responsive element
Patent
1990-10-01
1992-06-30
Fuller, Benjamin R.
Recorders
Performance of multiple functions of steam and gas engines
Pressure responsive element
346140R, 346 75, G01D 1518
Patent
active
051267527
ABSTRACT:
To flush ink out of the ink gun 15 of an ink jet printer, it is connected to a suction source 23 (normally used for gutter suction) through a purge line 33, purge valve 35 and gutter valve 27, while the ink feed line 13 is connected to the solvent reservoir 17 through a feed valve 11 and a flush valve 37. This draws solvent from the solvent reservoir 29 into the feed line 13 and the ink gun 15. Then, the purge line 33 is isolated from the suction device 23, and the feed valve 11 connects the feed line 13 to a supply of ink pressurized by ink pump 5. The pressurized ink is driven into the feed line 13, driving some of the solvent already in the feed line and the ink gun 15 out through the nozzle of the ink gun 15. The ink flow is then stopped before fresh ink reaches the ink gun 15. This avoids ink drying in the ink gun 15, blocking the nozzle, while the jet is not running.
By delivering solvent along the ink feed line 13, and using the suction device 23 and the ink pump 5 to drive the solvent, instead of providing a solvent pump and a solvent line, the complexity, bulk and heat generation of the ink system are minimized.
REFERENCES:
patent: 4296418 (1981-10-01), Yamazaki
patent: 4577203 (1986-03-01), Kawamura
patent: 4862192 (1989-08-01), Slomianny
patent: 4910529 (1990-03-01), Regnault
Fuller Benjamin R.
Linx Printing Technologies Limited
Preston Gerald E.
LandOfFree
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