Balls to bubblejets

 作者:阮吱     |      日期:2019-03-08 04:11:01
By Barry Fox Vibrating ball-bearings could make inkjet printers cheaper and more efficient, according to Korean company Samsung. Rather than blasting jets of ink onto paper by heating it to create an air bubble, or by using piezo-electric injectors, Samsung uses a tiny ball controlled by an electromagnet (GB 2 330 799). The ink is stored in a cavity behind a fine nozzle and is backed by a silicone rubber membrane. The ball-bearing sits under the membrane near the electromagnet. When a current is pulsed through the magnet, the ball repeatedly hits the membrane,