Screen printing machine with waste printing plate discharge means

A screen printing machine with printing means and waste printing-plate discharge means, said waste printing-plate discharge means including discharge rollers, a waste printing-plate container for receiving waste printing-plates peeled from a plate cylinder by said discharge rollers, a compression plate having a support shaft outwardly projecting from said compression plate and provided with a downwardly movable tendency for resting on and compressing said waste printing plates received in said waste printing-plate container, guide means for guiding said support shaft, and an operating member provided outside said waste printing-plate container for upwardly moving said compression plate against the downwardly movable tendency thereof, said operating member including a vertically rockable arm for causing upward movement of said compression plate to a position above a waste printing plate discharged into said waste printing-plate container by said discharge rollers, said waste printing-plate containers being removably received in a position to receive waste printing plates and wherein said arm is rockable downwardly to cause downward movement of said compression plate after discharge of a waste printing plate into said waste printing-plate container by said discharge rollers, said machine further comprising an actuator mounted on said support shaft, a switch provided in the path of movement of said actuator and operable when actuated by said actuator, and a control circuit for providing an alarm when said waste printing-plate container is full so that said actuator no longer actuates said switch when it is moved downwardly.