Apparatus and method for detecting and correcting for evaporation from recirculated unused ink drops in an ink jet printer. The specific gravity of the recirculating ink is compared with that of a standard by measuring the time of fall of heavy floats through reservoirs of circulated and uncirculated fluid. A significant difference in fall times is compensated by the replenishment of fluid in the recirculating ink supply.
申请公布号
US4130126(A)
申请公布日期
1978.12.19
申请号
US19770801689
申请日期
1977.05.31
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
CHOCHOLATY, WARREN L.;EVANS, ROBERT K.;PERRY, FRANCIS J.