Patent ID: 6846071

Claim:
An ink supply apparatus for large-scale inkjet printer, the apparatus comprising: a cartridge 300 having a storage pack 30 , which is installed in a rectangular parallelepiped case 301 , which contains ink, and which has, at front and rear ends, respectively, an ink outlet 31 and an ink inlet 32 , respectively, the ink outlet and inlet being integrally formed to the storage pack, and an operational switch 70 which is installed on one side under the case, and which is operated in on and off states by an operational plate 60 integrally formed on a surface of one face of the storage pack 30 ; an ink supply tank 400 storing a certain quantity of ink and connected with a supplying tube 41 through the ink inlet 32 of the storage pack 30 so as to continuously refill the storage pack 30 with ink by a head drop; and a solenoid valve 50 installed to the supplying tube 41 at proper position and connected with the operational switch 70 so as to open and close the supplying tube 41 using on/off operation of the operational switch.