Patent ID: 7325492

Claim:
A stencil printer comprising a print drum, pressing means selectively movable into or out of contact with said print drum, and wrapping, in a duplex print mode, a duplex master formed with a first image and a second image in a lengthwise direction of said duplex master around said print drum or wrapping a simplex master formed with a third image around said print drum, said stencil printer being capable of selectively performing a duplex print mode operation, which consists of a front printing step and a rear printing step following said front printing step, or a simplex print mode operation having only one printing step, wherein a controller is provided and configured to be operated to place the stencil printer into the simplex print mode based upon an input from a simplex print mode selection input element or to be operated to place the stencil printer in the duplex print mode based upon an input from a duplex print mode selection input element, said controller being further configured to avoid conflicting print mode selection so that when, after the duplex print mode has been selected by the duplex print mode selection input element and the duplex master has been wrapped around said print drum, and said simplex print mode selection input element is operated, said stencil printer produces an alarm and inhibits the simplex print mode operation from being started.