Printer for printing on wrapping paper being fed to a cigarette making machine

A printing device for printing on wrapping paper fed to a cigarette manufacturing machine, comprising:

• a printing roller train for printing predetermined data on the wrapping paper, having a pair of inlet rollers at a starting end of said train and a printing roller at a terminal end of said train;
• an ink nozzle for ejecting ink between said pair of inlet rollers;
• and
• an ink supply unit for supplying ink to said ink nozzle, said ink supply unit including:
• an ink cartridge having an ink chamber defined by a movable wall therein and filled with ink, and an ink discharge port;
• a cartridge holder for detachably housing said ink cartridge, said cartridge holder being located near said ink nozzle and having a nozzle mount for attaching said ink nozzle thereto at an outside surface of said cartridge holder, said nozzle mount having a nozzle connecting opening adapted to connect with an inside of said ink nozzle, wherein said cartridge holder includes a cylinder that opens at both ends and has a containing chamber adapted to house said ink cartridge therein and an end wall for closing one of the open ends of said cylinder, said end wall having a cartridge connecting hole adapted to be detachably inserted into the ink discharge port of said ink cartridge when said ink cartridge is housed in said cylinder;
• an ink supply passage connecting the ink discharge port of said ink cartridge and said ink nozzle, said ink supply passage being defined in said cartridge holder and said cartridge connecting hole defining an end of said ink supply passage;
• a linear actuator for pushing said movable wall into said ink cartridge, and
• control means for controlling action of said linear actuator.

A printing device for printing on wrapping paper fed to a cigarette manufacturing machine, comprising:

• a printing roller train for printing predetermined data on the wrapping paper, having a pair of inlet rollers at a starting end of said train and a printing roller at a terminal end of said train;
• an ink nozzle for ejecting ink between said pair of inlet rollers;
• and
• an ink supply unit for supplying ink to said ink nozzle, wherein said ink supply unit includes:
• an ink cartridge having an ink chamber defined by a movable wall therein and filled with ink, and an ink discharge port,
• an ink supply passage connecting the ink discharge port of said ink cartridge and said ink nozzle,
• a linear actuator for pushing said movable wall into said ink cartridge, and
• wherein the ink supply passage extends from a discharge tap at a closed end of the ink cartridge to a nozzle passage of the ink nozzle, and therebetween, the ink supply passage includes an internal passage of an end disc facing the closed end of the ink cartridge, and an axial hole of a cylindrical cartridge holder.