04558326 is referenced by 255 patents and cites 4 patents.

In an ink jet recording apparatus of the ink-on demand type, the recording ink is forcibly sent from a pressure chamber in the recording head to nozzles which jet the recording ink onto a recording medium. An ink cartridge is a closed-up rigid body having an opening therein which permits gas to flow in and out of the rigid body. The rigid cartridge body contains a flexible ink container bag which contains recording ink. A pressurized gas supply is connected to the ink cartridge body in communication with the opening thereof for increasing the pressure inside the ink cartridge body and for thereby increasing the pressure of the ink in the flexible container bag due to flexing of the bag under increased pressure. A cap made of elastic material is coupled to the cartridge body so as to be connected to the ink container bag in a liquid-type manner to supply recording ink from inside the ink container bag to the recording head under pressure to purge the recording head of bubbles and of ink previously contained therein.

Title
Purging system for ink jet recording apparatus
Application Number
6/529611
Publication Number
4558326
Application Date
September 6, 1983
Publication Date
December 10, 1985
Inventor
Yasuhiko Tanaka
Kodaira
JP
Yoshiaki Kimura
Hachioji
JP
Agent
Frishauf Holtz Goodman & Woodward
Assignee
Konishiroku Photo
JP
IPC
G01D 15/16
G01D 9/00
View Original Source