Stencil printer

A stencil printer comprising:

• a first drum including a first flexible master support;
• a second drum including a second flexible master support and having a circumferential surface adjoining said first drum;
• first ink feeding means arranged in said first drum for feeding ink to said first drum, and including a first ink roller selectively movable between a first inoperative position preventing said first master support from contacting said second master support and a first operative position bulging said first master support into pressing contact with said second master support;
• second ink feeding means arranged in said second drum for feeding ink to said second drum, and including a second ink roller selectively movable between a second inoperative position preventing said second master support from contacting said first master support and a second operative position bulging said second master support into pressing contact with said first master support;
• first ink roller moving means for moving said first ink roller from said first inoperative position to said first operative position;
• second ink roller moving means for moving said second ink roller from said second inoperative position to said second operative position;
• a drum support member removably mounted to a casing of said stencil printer, and rotatably supporting said first and second drums while removably supporting at least one of said first and second drums, and allowing a press roller unit including a press roller to be loaded in place of the removable drum;
• print mode switching means for setting up a simplex print mode when said press roller unit is mounted to said drum support member, or setting up a duplex print mode when said first and second drums are mounted to said drum support member;
• and
• control means for causing, in said simplex print mode and when a paper is passed between said press roller and the other drum for printing, the ink roller moving means assigned to said other drum to move the ink roller of said other drum to the operative position assigned to said ink roller to thereby bulge the master support of said other drum to bulge into pressing contact with said press roller with the intermediary of the paper;
• said control means causing, in said duplex print mode and when a paper is passed between said first and second drums for printing, said first and second ink roller moving means to respectively move said first and second ink rollers to said first and second operative positions to thereby bulge said first and second master supports, whereby said first and second master supports are brought into pressing contact with each other with the intermediary of the paper.