X-RAY APPARATUS AND CLOSURE MECHANISM THEREFOR

An apparatus for inspecting various articles in connection with the present invention comprises a structure for operating a retractable door which includes a shaft member, a flexible door member carried by and windable on the shaft member, a motor structure for driving the shaft member, and a gear train mechanically linking the motor and shaft member. The gear train includes a drive gear and a driven gear with the driven gear being connected to the shaft member and the drive gear being connected to and driven by the motor. The drive gear and driven gear both comprise gear teeth about only a portion of the respective circumferences. A switch member for controlling the motor is provided, and an actuating control structure is provided with respect to the drive gear for controlling the switch member.