| 摘要 |
<p>Disclosed is a lockout mechanism (50) for preventing an operator from filling a toner hopper (11, 12, 13, 14) in an electrographic printing device until the hopper (11, 12, 13, 14) is at least empty enough to accept the entire contents of a toner cartridge (24). Interlock mechanism (50) takes advantage of the already existing selector shaft (21) to selectively de-activate lockout members (112) in response to a low toner level transducer (119). Each hopper (11, 12, 13, 14) is provided with a lockout member (112) which is pivotable between a locked out position and a refill position. The locked out position has the lockout members (112) interfering with a connection between toner cartridge (24) and the top of toner hoppers (11, 12, 13, 14). Lockout members (112) are held in their locked out positions by cam follower members (102), which are slidable between an upward locked out position and a downward refill position. A slider member (108) interacts with the cam follower members (102), via follower pins and notches (105, 109), to lock the cam follower members (102) in their upwards position or to allow them to move down against the selector cams (100). <IMAGE></p> |
