Continuous ink system
（重定向自Continuous Flow System）
![Continuous ink system in an HP Business Inkjet 1200n. The ink is transported from tanks through the black flexible band, which is rigid so it does not fall into the path of the printhead and cause a jam.](/Images/godic/202501/06/HP_Business_Inkjet_1200n_-_Continuous_Ink_System_-_Interior_overview1519.jpg")
![Close-up view of the above printer, showing the individual removable printheads and ink tanks for each color.](/Images/godic/202501/06/HP_Business_Inkjet_1200n_-_Continuous_Ink_System_-_Printhead_shown_removed1519.jpg")
![Disassembled view of the above printer. Metal needles insert into the ink tanks to collect ink. The liquid inlet is a notch cut into the side of the needle, with a spring-loaded sliding rubber cap (shown) that slides up over the notch when the tank is removed. This design retains moisture inside the ink supply tubing and prevents dry-out and clogging when ink tanks are either not installed, or are removed for replacement.](/Images/godic/202501/06/HP_Business_Inkjet_1200n_-_Continuous_Ink_System_-_Ink_feed_system_needle_overview1519.jpg")
![](/Images/godic/202501/06/Cis11519.jpg")
A continuous ink system (CIS), also known as a continuous ink supply system, a continuous flow system, an automatic ink refill system, a bulk feed ink system, or an off-axis ink delivery system is a method for delivering a large volume of liquid ink to a comparatively small inkjet printhead. Many business and professional grade printers incorporate a continuous ink system in their design to increase printing capacity.