Plug connection for an ink supply

A plug connection for ink supply between an ink container having a supply connection, and an ink-consuming component that withdraws ink from said ink supply via said supply connection, said plug connection comprising:

• a connection holder configured for placement against said ink supply and around said ink supply connector;
• a coded rapid action cartridge coupling forming a part of said ink-consuming component, said coded rapid action cartridge coupling comprising a mechanical cartridge coupling coding;
• a guide in said ink connection holder that guides said coded rapid action cartridge coupling to produce a fluid connection with said ink supply connector, said guide comprising a guide mechanical coding that is coded with respect to said cartridge coupling mechanical coding to allow said guide to accept only a coded rapid action cartridge coupling having a cartridge coupling mechanical guide that corresponds to said guide mechanical coding;
• and
• an unlocking element in said ink connection holder being manually manipulable and being mounted for movement in said ink connection holder between a locked position that maintains said ink connection holder, said ink supply connector and said coded rapid action cartridge coupling in place relative to each other, and an unlocking position that allows removal of said coded rapid action cartridge coupling from said ink connection holder and removal of said ink connection holder from said ink supply connector.