Patent ID: 7389728

Claim:
A printing machine, comprising: roller fittings constructed as quick-change devices or quick-acting closures; a hollow roller through which a temperature control liquid flows, said roller being mounted in said roller fittings; said roller fittings permitting said roller to be quickly removed from said roller fittings and the printing machine and permitting said roller to be quickly inserted into said roller fittings and the printing machine again, by an operator of the printing machine; a feed line for conducting the temperature control liquid into said roller; and a line coupling having a first coupling half being a first shutoff valve and a second coupling half being a second shutoff valve; said line coupling fluidically interconnecting said roller and said feed line when the roller is inserted into the printing machine, and fluidically separating said roller and said feed line from each other when said roller is removed from the printing machine; said first shutoff valve and said second shutoff valve being self-closing shutoff valves closing automatically when the roller is removed from the printing machine; and when the roller is removed from the printing machine: one of said shutoff valves substantially preventing the temperature control liquid from emerging from said feed line, and the other of said shutoff valves substantially preventing the temperature control liquid from emerging from said roller.