A tank base (12) is formed of a mount block (13) and a feed tube (16), and a first paint passage (17) is provided internally through the feed tube (16). A baggy tank (19) is composed of a support member (20) and a bag member (21) having opposite ends thereof securely fixed to the support member (20)...http://www.google.com.au/patents/US7931171?utm_source=gb-gplus-sharePatent US7931171 - Paint cartridge
