| 摘要 |
A plurality of finger-like dispensing arms are mounted for pivotal movement back and forth along a path over a slot in the bottom of a toner dispenser hopper. The degree of pivotal movement controls the amount of toner dispensed. A linkage including a cam follower arm is provided for driving the dispensing arms in one direction in response to rotation of a continuously rotating cam. Springs provide the force for driving the dispensing arms in the opposite direction and for holding the cam follower against the cam. A manually adjustable stop element is provided for limiting the movement of the cam follower arm as it attempts to follow the cam in response to the force exerted by the springs. By adjusting the stop element, the degree of pivotal motion of the dispensing arms may be adjusted to any value throughout a continuous range extending from no motion to some predetermined maximum degree of motion, thereby adjusting the dispensing rate.
|
