Patent ID: 9302482
Filing Date: 2016-04-05
CPC Classification: B41J

Claim Text:
1. An inkjet printing device comprising: an ink container which stores ink; a nozzle which jets the ink for printing on a printing object; a feed pump for feeding the ink from the ink container to the nozzle through an ink supply passage; a gutter which draws the ink jetted from the nozzle and unused for the printing along with air; a print head which stores the nozzle and the gutter; a first collection pump which sends the ink drawn by the gutter along with air to the ink container for collection through an ink collection passage; an exhaust passage which discharges the air as exhaust gas from the ink container, which has been mixed with an ink solvent and collected into the ink container; a gas-liquid separator for separating the exhaust gas from liquefied ink solvent formed by liquefaction of the ink solvent contained in the exhaust gas in the exhaust passage using capillary action; a second collection pump which sends the liquefied ink solvent separated by the gas-liquid separator for collection into the ink container through an ink separation-collection passage; and a drip prevention unit provided at a rear stage where the exhaust air is discharged from the gas-liquid separator.