| 摘要 |
An inkjet printing head 100 comprises a nozzle assembly having a pair of nozzles 111A, 111B, each nozzle 111A, 111B being connected through a channel 112A, 112B with a separate liquid reservoir 116A, 116B for forming a primary drop 121A, 121B of liquid at the nozzle outlet 113A, 113B. The head 100 also has a means 131 for guiding the primary drops 121A, 121B within the printing head 100 from the nozzle outlet 113A, 113B to a connection point 132; and means 132 for restricting the freedom of combination of the primary drops 121A, 121B into a combined drop at the connection point 132. The head 100 may further comprise gas-supplying nozzles 119A, 119B for blowing gas towards the separator tip 132. The means for guiding the primary drops (221A, 221B, Fig.4A) may have a form of a primary enclosure (241, Fig.4A) surrounding the nozzle outlets (213A, 213B, Fig.4A) extending downstream and having a first section (243, Fig.4B) for restricting the freedom of combination of primary drops (221A, 221B, Fig.4A) with a diameter (D2, Fig.4B) not smaller than the diameter (D2, Fig.4B) of the combined drop (222, Fig.4A). |
