An ink tank consists of a case body and a top lid. The case body consists of an inner case having an ink chamber and an outer case. The ink chamber is parted into an absorbent chamber containing ink absorbents, and a storage chamber storing ink. A space is provided as a heat insulating layer between...http://www.google.com.au/patents/US20060221154?utm_source=gb-gplus-sharePatent US20060221154 - Ink tank, ink-jet recording apparatus and method of manufacturing ink tank
